What Is the Best Way to Slow Down a Dc Electric Motor Like the One I've Linked Below?

There are 2 effective ways to slow down a motor like this. Just lowering the voltage will reduce the power available to the motor and it wo not run smoothly. You can use a gearing system or you can use a pulse width modulated control. PWM allows for smooth speed control and good power. The link below leads to an excellent PWM circuit tutorial. It's short and deals directly with controlling a motor speed.

1. Is it bad to spin an electric motor fast without the use of electricity.?

If the motor is powered, and if you force it to turn faster, slower or even the other way, you will induce opposite currents through the motor. You will not damage the motor, but if it is driven by an electronic drive, you could damage the driver... If the motor is not powered, and it has a permanent magnet, you just make it a generator! (And if it still connected to a driver, you could damage the driver again!)

2. Can an electric motor replace a jet engine in terms of performance on aeroplanes? As we are aiming to limit our CO2 emissions in future, what plans do aviation sector have to reduce their share of CO2?

It makes no sense to worry about aviation CO2.Assuming that CO2 is bad (can be debated, but I am unqualified to do so), transportation contributes less than 1/3rd.Of transportation's 29%, aircraft produce 9%The investment to try and reduce 2. 5% of overall CO2 emissions by perhaps 50% by transitioning aircraft to electric power is ludicrously out of proportion

3. need help for " diesel and electric motor "comparison to use in corn mill?

You've not really provided enough information on this one. You might compare them on all sorts of things, any of which might take a long while to answer. For example, they use different fuels, operate at different temperatures, come in diffrent configurations, have different controls, use energy with different efficiencies, are more or less available in idfferent markets, require different maintenance schedules, are different sizes for the same hp. These are some of the factors which one might compare them on. As an example, electric motors typically require less maintenance but reuire a reliable power supply to operate continuously (can not run them during a power outage) whereas the diesel motors need to have oil and water routinely changed, run hotter, have exhaust that needs to be handled, but they can be run anywhere that you can get fuel to (even in rural areas without electric available). Hope that helps

4. how can i determine amperage draw of an electric motor with specs plate missing?

Hello William. I remember you question from about a week ago. Good for you for building your new circuits according to NEC specs. It's not just the law, it's good sense and safe construction. If the ac cord to the compressor is 12 gauge, then the compressor has to draw less than 20 amps. If you are feeding it with a 20 amp circuit, it should be okay. The reason your 15 amp breaker tripped when the compressor motor kicked on was because of the voltage spike caused by the initial motor startup. This spike is generated by all ac motors when power is first applied. Apparently, it was more than your 15 amp breaker could handle. In engineeringspeak, the counter-emf generated by the motor tripped your breaker. I do not know how long it takes for your compressor to reach 100 psi. I am guessing 1 to 2 minutes. This is long enough for a 14 to 15 amp load to overheat the circuit breaker, causing it to trip. The other possibility is that your 15 amp circuit breaker could be weak. I do not know how old that breaker is, but over time, breakers will weaken and trip at less than their rated current. Try replacing that 15 amp breaker with a new one and see what happens. If the breaker does not trip, then you had a weak breaker and your compressor draws less than 14 amps, continuous current. I would still put the compressor on a new, 20 amp circuit for reliability. The last thing you need is a breaker tripping while you are in the middle of a job.

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Five Formula 1 Cars for the Road
The fastest men on four wheels are preparing to start the 2013 Formula One championship at Albert Park in Melbourne this weekend. The mega-million dollar circus not only attracts the top tier of racing drivers, it's also a testbed for the fastest cars to wear numberplates.So even if you're not one of the elite group of 22 F1 drivers, you can still experience some of F1's technological thrills on the road. Although you'll have to be among a pretty elite group of people who can afford our Top Five F1 cars for the Road.Revealed just last week at the Geneva motor show, the Italian car maker's oddly self-titled hypercar is the closest machine to an F1 car that's ever been produced.Its carbon fibre construction is based on the same principles as an F1 machine, its body panels feature active aerodynamics that were developed in the team's high-tech wind tunnel to produce maximum downforce and its 588kW V12 engine is assisted by a 120kW electric motor and battery pack that borrows technology from the Kinetic Energy Recovery System (KERS) that Ferrari has developed since it was introduced to F1 racing in 2009.The net result is that the LaFerrari can rocket from 0-100km/h in less than three seconds and reach a top speed of more than 300km/h - both of which are line-ball with an F1 car in terms of performance.Ferrari even claims that both its current grand prix drivers, Fernando Alonso and Felipe Massa, have been heavily involved in the development of the car As with its superseded F1 cars, Ferrari is only planning to sell the LaFerrari to a select group of its wealthy car collectors - including up to seven Australians - with a pricetag of about $2 million each.As far as Formula One rivalries are concerned, McLaren and Ferrari is the F1 equivalent to our tribal Ford-versus-Holden stoush. And the automotive arm of the British-based grand prix outfit was never going to back away from a roadgoing battle with the Prancing Horse.It trumped its Italian rival when it revealed its P1 hypercar at the Paris motor show last year, and the final production version was unveiled the day before the LaFerrari in Geneva last week Apart from their polar opposite appearances - the McLaren's space-age curvy style is in stark contrast to the Ferrari's sharp-edged angles - both claim to the offer similar levels of eye-popping performance by borrowing the latest F1 technology.The McLaren has a twin-turbo V8 engine and electric motor to produce a total of 674kW and uses the secondary powerplant to assist in acceleration much like an F1 car with a push-button on the steering wheel. Its massive rear wing also tilts backwards at high speeds while in a straight line to reduce drag and increase top speed, much like the Drag Reduction Systems (DRS) currently used by F1 cars on the main straights.Unlike the Ferrari, the P1's battery pack can recharged via a household power and the car can run on the electric motor only at city speeds for up to 10km.As with Ferrari, McLaren says that both former champions Jenson Button and Lewis Hamilton, who has switched to Mercedes this season, were involved in the car's development. It also plans to build a limited run of its P1 in left-hand drive only with each costing over $2 million, and is currently vetting more than 800 potential owners.With 182 Grand Prix victory trophies in its cabinet, McLaren has long been a technological pioneer in Formula One.In 1981, it was the first team to build an F1 car with the now ubiquitous lightweight, high-strength carbon fibre monocoque. A decade later it became the first company to transfer that technology to the road with its first road car, the aptly-named F1.The radical three-seat supercar - which featured a central driving position with a staggered passenger seat on each side - was the epitome of lightweight automotive engineering that included a specially-crafted set of titanium tools and tailor-made luggage to fit in its side-mounted compartments.Powered by a 6.0-litre BMW -built V12 that featured pure gold leaf insulation in the engine bay, it also held the mantle of being the fastest car in the world for more than a decade with its 390km/h top speed only beaten when the Bugatti Veyron arrived in 2005.McLaren produced only 106 of its F1 road cars between 1992 and 1998, 72 of which were able to be road registered and still command more than $1million at auctions today. Only one McLaren F1 is believed to exist in Australia.Okay, you don't need to spend a squillion bucks to taste F1 technology.BMW's last-generation M5 featured a V10 engine that it claimed directly borrowed lessons learnt through its involvement as an engine supplier to the Sauber and Williams F1 teams.Although it arrived the year after Formula One mandated that all grand prix cars would be powered by V8 engines, the M5's V10 featured a number of F1-style technologies that helped it produce 373kW and become the world's fastest four-door sedan at the time. The engine had eight individual throttle bodies, a lightweight engine block and a two-stage engine mapping computer that allowed it be driven around town without its full potential, or full-blast on a race track.Even though it was clunky, it also had seven-speed robotised manual gearbox that featured a launch control function and allowed to sprint from 0-100km/h in 4.4sec.If you're looking for an F1-inspired bargain, Honda's NS-X is a great place to start With prices for original, mint-condition models now commanding less than $40,000, Japan's original Ferrari fighter still offers F1 thrills for the same price as a modern hot hatch.It was the first production car to be built around a lightweight all-aluminium monocoque - helping it achieve a benchmark kerb weight of 1350kg at the time of its launch in 1990 - and its mid-mounted 3.0-litre V6 featured titanium conrods, forged pistons and Honda's VTEC variable valve timing system, all of which were a result of technologies developed through its F1 engines that helped power McLaren to its championship-winning ways in the mid-to-late 1980s.Its suspension also featured F1-style double wishbones with lightweight forged control arms.A number of F1 drivers also played a part in its development, including Japan's Satoru Nakajima and legendary Brazilian Ayrton Senna.
Advanced Materials for Electric Motor and Generator Windings
Carbon nanotube fibers and yarns have gained the attention of the electric motor and power generation industries due to the incredible combination of properties offered by CNT materials. Carbon nanotube fibers and yarns offer a highly flexible, strong, and lightweight option for motor winding constructions. Carbon nanotubes also offer higher conductivity than copper at the molecular level, although it has not yet been demonstrated that CNT yarns can achieve this level of conductivity on the scale of macroscopic fibers.Why do people say the ford 400m 6.6 v8 was a bad motor?So you are saying its not to late for a recall guys!!!!!!!!!!!!!!!!!!What is the downside of synthetic motor oil...?Synthetic oils are typically more expensive than 'conventional' motor oils, but then you can go longer between oil changes, so I am not sure that's a really bad thingIs it okay to use 10-30 Diesel motor oil in my Gasoline Car?No. Diesel motor oil is meant for diesel engines. If you have not opened the containers, take them back and exchange them for an oil rated for gasoline enginesWhat kind of mods does a turbo motor need to run more boost?well for a start your insurance will go through the roof. then the best option is a twin turbo with a gate valve.fuel leak behind motor.F-350 6.0?check your fuel lineHow to determine the pole number or synchronous speed of an AC motor from its rated RPM?Here is a table that has been useful to me in the past: -Please also note that the motor you have linked is a standard induction motor and wo not run at synchronous speed. It's likely to be a 6 pole machine running at 50Hz that would produce a synchronous speed of 1000 RPM. However there are a few other options that could be close but, as 50Hz is a standard frequency I suggest it is a 6 pole machine.What is your favorite brand of motor oil and why?Whatever is on sale. I like to save money. I do like the looks of pennzoil's ad pack. In my 77 IH Scout I usually run Shell Rotella, Cheveron Delo, or Mobil Delvac.What is the highest rpm for a home furnace blower motor?Good I want I would see this furnace. I would like to grasp if the quilt somehow restricts the intake aspect of the blower. It must not . However, if the filter is clogged or if there's every other restriction, the air is using the gap formerly occupied via the quilt as another route to get to the blowerhow would the mechanic tighten the choke so it doesn't keep coming on and making the motor cut out?check to make sure there isnt any lose nuts, but a choke shouldnt be lose enough to come on on itw own. usually the take alittle force to get them on. is the motor cutting out at the topend, off idle or where? you might need to check plugs, clean carb, or adjust floats.just put Chevy 350 motor in 1996 dodge neon?I put a 2.4 in mine. Its running but still need to set up new alt and power steering brackets. A 350 in a neon would be amazing. I want a rideHow much would it cost to rebuild a 350 Chevy motor?I can assure you that rebuilding your 350 will not cost you $4000.00, only if you put some high performance parts in that motor will it cost you that much, but a standard rebuild for that motor should cost around $1200.00, providing you do all the work1986 johnson gt 150 tilt stuck up motor on t&t work both ways? but makes noise trying to come down?you dont specify if it does come down or not is the tilt LOCK on? if not you may have to cycle it up and down a few times to get any trapped air out this is why you should NEVER store a trim and tilt motor in the up position for long periods of time they can hydro lock and get fluid trapped on both sides of the trim/tilt pistons. this happens from leaks and or thermal expansion you can also open the manual release valve and lower it and then try to cycle it a few times to see if it comes out of it. you can also check the fluid for level or contaminents.
Volt to Get 100 Km Per Litre, Gm Says
DETROIT-General Motors Corp. said its Chevrolet Volt rechargeable electric car should get 230 miles per gallon (U.S.) of gasoline (100 kilometres per litre) in city driving, more than four times the mileage of the current champion, the Toyota Prius.GM came up with the figure in early tests using draft guidelines from the U.S. Environmental Protection Agency for calculating the mileage of extended range electric vehicles, said Tony Posawatz, GM's vehicle line director for the Volt.If the figure is confirmed by the EPA, which does the tests for the mileage posted on new car door stickers, the Volt would be the first car to exceed triple-digit gas mileage, Posawatz said.The Volt is powered by an electric motor and a battery pack with a 40-mile range. After that, a small internal combustion engine kicks in to generate electricity for a total range of 300 miles. The battery pack can be recharged from a standard home outlet.Most automakers are working similar plug-in designs, but GM could be the leader with the Volt, which is due in showrooms late in 2010.Toyota's Prius, the most efficient car now sold in the U.S., gets 48 miles per gallon. It is a gas-electric hybrid that runs on a small internal combustion engine assisted by a battery-powered electric motor to save gasoline.The first-generation Volt is expected to cost near $40,000, making it cost-prohibitive to many people even if gasoline returns to $4 per gallon. The price is expected to drop with future generations of the Volt, but GM has said government tax credits and the savings on fuel could make it cost-effective, especially at 230 miles per gallon."We get a little cautious about trying to forecast what fuel prices will do," Posawatz said. "We achieved this number and if fuel prices go up, it certainly does get more attractive even in the near-term generation," he said.GM was to present details of the mileage figure on Tuesday morning at an event at its technical center in the Detroit suburb of Warren.Figures for the Volt's highway and combined city/highway mileage have not yet been calculated, Posawatz said. The combined mileage will be in the triple digits as well, he said, but both combined and highway will be worse than city because the engine runs more on longer highway trips.The EPA guidelines, developed with input from automakers, figure that cars like the Volt will travel more on straight electricity in the city than on the highway. If a person drives the Volt less than 40 miles, in theory they could go without using gasoline.The mileage figure could vary as the guidelines are refined and the Volt gets further along in the manufacturing process, Posawatz said.GM is about halfway through building about 80 Volts that will look and behave like the production model, and testing is running on schedule, Posawatz said.Two critical areas, battery life and the electronic switching between battery and engine power, are still being refined, but the car is on schedule to reach showrooms late in 2010, he said.GM is simulating tests to make sure the new lithium-ion batteries last 10 years, Posawatz said."We're further along, but we're still quite a ways from home,'' he said. "We're developing quite a knowledge base on all this stuff. Our confidence is growing.'' The other area of new technology, switching between battery and engine power, is proceeding well, he said, with engineers just fine-tuning the operations."We're very pleased with the transition from when it's driving EV (electric vehicle) to when the engine and generator kick in,'' he said, GM also is finishing work on the power cord, which will be durable enough that it can survive being run over by the car. The Volt, he said, will have software on board so it can be programmed to begin and end charging during off-peak electrical use hours.Chrysler LLC, Ford Motor Co. and Daimler AG are all developing plug-ins and electric cars, and Toyota Motor Corp. is working on a plug-in version of its gas-electric hybrid system. Nissan Motor Co. announced last month that it would begin selling an electric vehicle in Japan and the U.S. next year.
How an Atkinson Cycle Engine Works
The Atkinson Cycle and Hybrid Cars So, you've got an engine that's really efficient, but it lacks in power, especially of the torque variety, the kind of power that the fire-breathing drag car has in spades. But, if you're a hybrid powertrain engineer, you also have an electric motor that has all torque all the time, from 0 rpm. The problem with the electric motor is that it doesn't sustain a high speed very well, not as well as a gasoline engine does, with its higher horsepower. What to do, hybrid powertrain engineer?Well, if you're Gilbert Portalatin, who happens to be a hybrid powertrain engineer with Ford, or any other engineer at almost any other car company building full hybrids, you bring these two systems together like chocolate and peanut butter. At low speeds, the electric motors kick in with their torque and move the car forward. Unless you're one of those super careful hypermilers who press the accelerator as gently as if a kitten were hiding underneath it, the gasoline engine will come online pretty quickly, though the electric motor is doing quite a bit of work. At about 40 mph or so, the Atkinson cycle engine will take over almost completely, with a bit of assist from the electric motor.As long as you've got this kind of combo, you can engineer the Atkinson cycle engine to mesh precisely with the electric motor for optimal efficiency. If you insist on taking on the fire-breather in the next lane, you won't be left completely in the dust. "Smash the pedal, and you'll get what you're asking for -- all of both powerplants," said Lee at Toyota.This load leveling is why a full hybrid like the Toyota Prius or Ford Escape get better mileage around town than they do on the highway -- exactly the opposite of, like, every other vehicle on the road. The non-fire-breathers among us drive pretty slowly around town. We start and stop a lot, and we don't get up to 75 mph, so the electric motor takes a lot of the burden. On the highway, though, the gasoline engine is pretty much working alone.Hardly anyone in 1887 could have predicted the happy peanut butter-and-chocolate marriage between Atkinson's engine and electric motors -- cars didn't even have permanent roofs then.
What Is the Best Placement of an Electric Motor for Power Assist Vs .power Replacement.?
I would like to add a comment to Breath On The Wind, when saying about the following in relation to the ICE engine;; "at a steady rpm can reach a high efficiency of around 30% will fall around 15% through a drive train.". WOW, that is a peak efficiency of 30 % BEFORE drive train loses. I wonder what the average efficiency would be for real world driving conditions. 15 % drive train loses does not sound like much, but when you look at it this way; 100 percent, divided by the 30% means that at least 3.3 times energy is required due to engine inefficiencies, and then add 15 % to that. 15% drive train loss effectively means 50% as much as energy if one had 100% efficiency. Of course no car has 100%, and that is merely to illustrate how the extremity of the ICE inefficiency as sort of amplified. From software simulation data, I calculated from average pressures over each cycle, that 30% of the pressure in the cylinder compressing, is fighting against the cylinder in its combustion. That is for my 4 cylinder car, and is before considering that a large portion of the energy is focused at angles of low leverage, meaning a low percentage of transfer. Some further things i would like to add about ICE - We have catalytic converters to burn the unburnt fuel and dump that heat (ie energy) out the tail pipe. - we have a radiator to cool and get rid of that excess heat, and that is more wasted heat yet again. Essentially, what all of that means, is that if one still wants to keep using the precious boat anchor to get around with, there is a HUGE room for improvement in the ICE engine.1. im replacing an electric motor on an industrial gas dryer and dont know how much to charge any ideas?I would say about 2402. SERIOUS ANSWERS ONLY PLEASE! On an electric motor, what's the difference between volts and watts?Picture electricity as water. Volts are the water's pressure. Amps are the water's volume. Watts are the water's power or ability to do something like put out a fire using its volts and amps. Like a water hose with an adjustable nozzle, when you make the nozzle smaller, the water comes out with more pressure (volts). When you make the nozzle bigger, the water comes out with more volume (amps). Electricity is the same. High voltage will arc through the air but unless it has some current too, it is harmless like static electricity. High current will melt a wire but without some voltage it's harmless, like your car battery. The formula for figuring power is P (in watts) = Volts X Amps. A 12 volt battery that puts out 5 amps can make 60 watts of power. Take the battery voltage up to 24 volts and you can get 120 watts of power. That's why portable drills with higher voltage batteries can make more power.3. How do you change the horsepower in an electric motor?by changing the pulley or gear on output shaft smaller gear will make more power4. how can i determine amperage draw of an electric motor with specs plate missing?most compressors need 20 amp service to run full throttle . I would switch it to a 20 amp service5. How do you increase the horsepower of an electric motor?A Tesla battery is made from many cells, there is a max current rating for each cell, a larger battery has more cells and therefore give out a larger peak current. (Ian ringrose)It is also linked to the naximum output of the electric motor. Which produces the rotation6. what is the best electric motor to put on a 16' canoe?Any trolling motor will do. Be sure to balance out the weight of the battery by making sure to put it on the center line.If it's not even, the canoe will turn in that direction7. How can I increase the power of a small electric motor?Whats the voltage ??? Double it..of course your lifetime is reduced to 1/4 its original. Short of that compressing the spring will take the same amount of time...in the decision of what a horsepower is, time is a key element and is inverse to the horsepower ,,So 1/2 the time twice the horsepower needed. . there ya go from the E.
Why Does My Electric Motor still Not Work!?
Your inverter makes a square wave that motors do not like. In other words, it gives you a peak plus value of voltage, and then it gives you a peak negative value. In regular AC current the wave is a nice smooth sine wave that is generated with a rotating generator so the voltage rises gradually to a peak and then gradually goes down to a negative peak. The magnets on your motor need this gradual rise and fall of voltage. With a square wave your magnets on your motor get a peak value and just when they start to rotate , the voltage is reversed so the magnets do not have time to get momentum going. You need an inverter that makes a true sine wave. I suspect you think you have a sine wave inverter, but is actually a square wave. You might need to put it on an oscilloscope to verify the wave form Also, grainboy is right. A swamp cooler uses very little current to run. It probably does not give many watts back out when inverted. But with no load on the motor it will not use anywhere near the 7.8 amps your motor is rated at. If you have a load on your motor from the start (like an air compressor or water pump scenario, then grainboy is right, there just is not enough juice to get the motor going. If you have a true sine wave inverter, then start the motor with no load on it at all. If you help by giving the shaft a turn with your hand and it runs....then you know for sure it is just way to low of power available to run the motor properly1. How do I grow up the speed of an electric motor?Increase the frequency of the electrical input. I.E. VSD.Adjustable-speed drive - Wikipedia2. building an electric motor for my science fair project?try searching for BOSAK's motor. It's easy to make. I made it in my high school project. It really explains how motor works and you can try your hypothesis too.3. Could an electric vehicle be be designed with a transmission for more torque with a smaller electric motor?You have to think of it as Power at the wheels. To accelerate a given mass, or keep it moving at speed against air drag, needs power,whether you measure it in watts or horsepower. Whatever drive system you use, it will take that amount of power from the batteries. The optimisation part can only be designing for efficiency, so the minimum possible power is lost in the drive chain. That generally means keeping gearing simple, to keep frictional losses and inertial mass down. Internal combustion engines cannot run at 'zero speed' as electric motors can. They also have problems at high revs due to balancing, stress on the con rods and valve bounce. Electric motors can easily run at high speeds without problems. An Engine probably has a usable speed ratio of about 5:1 where an electric motor has virtually no ratio limit. A gearchange simply is not needed.4. Can an electric motor replace a jet engine in terms of performance on aeroplanes? As we are aiming to limit our CO2 emissions in future, what plans do aviation sector have to reduce their share of CO2?That would be the logical choice going forward.In fact there already have been multiple test airplanes designed and flown using electric motors. There are couple issues that need sorting out before that happens commercially. These are listed below. Batteries : Battery Technology needs to improve to give Very High Density light battery holding charge for a significant period of time and charge really quick. Modern day batteries lack here. Case in Example the electric cars. You have a limited range to travel before the battery charge depletes. Same applies to Airplanes too. Also the modern day airplane refuels with Jet Fuel in 30 - 60 minutes (depending on airplane size) and give you a good 6-13 hrs flight time. Same is not possible with modern day Batteries.Power to Weight Ratio of the Electric motors: the modern day Electric motors get limited by the power to weight ratio. That is the amount of power they produce to the weight of the motor itself. The modern Jet engine scores better here. Example a B737 produces close to 46000 HP (actual thrust is measured in pounds of Thrust) for its weight. To generate similar power an electric motor gets too big and heavy (power to weight ratio). Having said all this Technology is moving exponentially. We get limited my Hardware. Once the technology and hardware both get there we will have it.Let's see what happens in the future. The answer maybe be sooner than we think. Can an electric motor replace a jet engine in terms of performance on aeroplanes? As we are aiming to limit our CO2 emissions in future, what plans do aviation sector have to reduce their share of CO2?
What Makes a Electric Motor Better ? What Motor Design Should I Take a Look at. Plz Help 10 Points?
To make an electric powered motor more desirable helpful ought to require a lot of work. genuinely, you should make it draw more desirable cutting-edge meaning utilising thicker cord for the windings. So take out all the former windings and wind new ones. you could also use a more desirable voltage, even if it ought to shorten the motor existence because the brushes and windings would no longer take care of the further warmth1. If the torque of an electric motor is so great, why don't pickup trucks start using them?When in an empty truck, there is not much difference compared to a car. But when using an electric motor in a pickup which is fully loaded is a while different situation.The motor has to product that much energy to move the load and the truck. You would be able to move the truck, maybe even drive it, but the battery power will surely not last for long.Consider the worst case, driving a fully loaded pickup truck, uphill at a speed of 50kmph. The battery will never last long and the life will surely reduce.2. How do you choose an electric motor?If you can use belts and pulleys than any standard speed will work. 1140, 1750, and 3450 rpm's. The other things you have to specify are Voltage, frequency,Horsepower, Single or three phase, and capacitor start if high starting torque is needed on single phase. Frame size. Motor enviroment such as requires open drip proof, totally enclosed, expolsion proof, air over, etc. bearing type, service factor, thermal protection, type of base, cradle mount, rigid mount, face mount, etc. Efficiency standard or high, You do not seem to have near enough informaiton.3. Necessary to lubricate old electric motor? [closed]If there were a problem with lubrication, we would expect that it would be slower when cold, and up to speed after warming up (and making the lubricant more fluid). Because your symptoms are the opposite, it may not be a simple matter of lubrication. There may be some electrical problem that only appears after components warm up.4. When an electric motor, such as an electric drill, is being used, does it act as a generator? If so, what is the consequence of this?No. When it is being used It is not acting as a generator as it is consuming energy not producing it.Now, if you get that electric drill motor and make it spin by wind, water or pedal force, the motor will generate electricity. It's efficiency will depend on several factors but you could generate electricity if, for instance, you are stuck with your bike and your drill on some remote area and there is running water nearby or is windy.5. Which type of DC electric motor is the best suited for driving a mechanical clock?A stepper motor typically gives you 200 steps per revolution. You could gear that to give the second hand a step per second or half-second. You can precisely control it by microcontroller (so you will have an accurate clock) and you still have all the gearing to play with between the second, minute and hour hands. The stepper wo not be cheating. It will be a sensible solution to the problem6. What is more energy efficient Hydraulic pump or electric motor?It depends on the application. For instance, how is the hydraulic pressure obtained? A hydraulic cylinder seems more appropriate for a lifting platform than the gears and levers that would be required for an electric lift7. can you run an alternator with an electric motor?easily, definite. Your alternator is truthfully a three section generator with all 3 stages joined by way of an entire wave rectifier gadget. in case you are taking an alternator and placed all 3 stages in sequence, get rid of the rectifier diodes, you have an output on the threshold of one hundred ten volts. this may be used to run a ac/dc rated motor. Alternator speed would be certain the output considering the fact which you will additionally be tricking the sector regulator to supply an entire field. many ordinary circuts are accessible with ordinary plans yet you would be able to desire to have an alternator which you will cope with to pay for to burn out. The waveform is not what you are able to call a sine wave and a few issues wo not be in a position to run on it. in the journey that your motor has an digital speed administration, beware. additionally, many automobiles have a intense ampere commencing requirement which could appear like a quick circuit temporarily
How the Toyota Prius Works
Toyota Prius Specs There are generally two types of hybrid cars available on the market. There are parallel hybrids, where there are several power options -- the electric motor can operate by itself to power the car, the gasoline engine can operate by itself or both the electric motor and the gasoline engine can work together. There's also the option of the series hybrid, where the gasoline engine, instead of directly powering the wheels, serves only to charge the vehicle's battery to provide power to the electric motor.The Toyota Prius is somewhat unique among hybrids. It's a combination of both of the previous types and is known as a series-parallel hybrid. This is possible because of the Prius' power split device, a special gearbox that connects the gasoline engine, electric motor and generator together into one unit. The device, which was introduced in the second generation Prius, contains a planetary gear set, and it allows the car's various power technologies to work together to move the vehicle. The electric motor is attached to a ring gear, which transfers the power of the motor to a reduction gear unit that's connected to the final drive. The planetary gear set also contains a smaller sun gear and a series of planet gears. All of these gears moving together not only provide power for the car, but they also provide power for the vehicle's generator. When the sun gear simply can't spin any faster, this is the limit of the car's fully-electric operation and the vehicle's internal combustion engine is switched on. This setup allows for increased efficiency since the electric motor and generator run as long as possible before the gasoline engine starts up and begins to burn fuel.The engine in the third generation Prius grew from 1.5 to 1.8 liters, giving the hybrid a boost in horsepower from 110 to 160, an important factor for those wary of the supposed weakness of hybrid cars. Also, the Prius doesn't have to be recharged, since its generator constantly supplies power to the battery. With all of this, the third generation of the Toyota Prius aims to get 50 miles per gallon (21.3 kilometers per liter) in combined city and highway driving, compared to 46 miles per gallon (19.6 kilometers per liter) for the 2009 Prius and 41 miles per gallon (17.4 kilometers per liter) for previous models.For more information about hybrid cars and other related topics, follow the links the next page.
Business Technology; New Life for an Old Idea
APRIL 27, 1988 This is a digitized version of an article from The Times's print archive, before the start of online publication in 1996. To preserve these articles as they originally appeared, The Times does not alter, edit or update them. Occasionally the digitization process introduces transcription errors or other problems. Please send reports of such problems to . Traditional electric motors can spin a shaft at speeds up to 10,000 revolutions a minute. At higher speeds, the motor rotors, which include the metal shaft and an assembly of laminations, wire windings or magnets, are torn apart by centrifugal force. The problem plagues both rotors for induction-type motors and synchronous motors, above left, and is particularly troublesome for high-power motors. REM Technologies, a new company started in Albany by several former General Electric employees, has developed an electric motor with a solid rotor that has no windings or laminations and is capable of reaching 50,000 r.p.m., the burst strength of the steel rotor itself, designers said.Electric motors turn a rotor by sending current through coils of wire, or windings, which create magnetic forces in both the stator, or outer part of the motor, and the rotor. The magnetic forces oppose each other, and this opposition makes the rotor turn. Stator windings are positioned in slots surrounded by metal, which can cause inefficiency at high speeds or high power. REM Technologies designed the stator so that windings are separated by an air gap, creating more efficiency.Electric motors tend to turn at a constant speed, so gears, transmissions, belts, pulleys or other devices are necessary to obtain the speed desired to run a piece of equipment. Using proprietary electronics, REM Technologies' motor varies the frequency of the electricity reaching the motor and the timing of the pulses so that additional efficiency is achieved and the speed of rotation can be precisely controlled.High-power, high-speed industrial motors have many applications in manufacturing, where speed and power are needed to make metal parts. Current technology can cut aluminum, a relatively soft metal, at high speeds, but more powerful motors are needed for high-speed cutting of cast iron and steel. Engineers at REM Technologies said the machine tool industry can make use of 30-horsepower motors that would turn as fast as 50,000 r.p.m.The new motor is known technically as a homopolar inductor drive motor. Its design was first described more than a century ago, but only in recent years has the concept attracted sufficient attention to interest engineers in adapting it with high-tech components.A version of this article appears in print on April 27, 1988, on Page D00007 of the National edition with the headline: BUSINESS TECHNOLOGY; New Life for an Old Idea. Order Reprints| Today's Paper|Subscribe
Which Electric Motor Should Be Used for Making Bike?
All you see the reason is Air pollution coming out from a bike/car from it's Mechanical Engine which rotates a shaft further connected to a bike or car's wheel.While electrical motors in running do not make any type of pollution. So these are the best alternatives to use in the bikes or cars. It should not be alternative, rather it would be primary for all bikes. This also save Petrol/Diesel which are limited in nature1. how does a diving hookah work?There are two air supply systems that are used for underwater diving activities. One system, known as Self Contained Underwater Breathing Apparatus (SCUBA), involves the use of high pressure metal tanks which are worn on the diver's back while diving. The equipment used in SCUBA diving is quite technical in nature, and SCUBA gear should not be used by persons who have not become a certified diver involving expensive, specialized instruction. Without a certification card indicating completion of such a course, you cannot purchase compressed air. Of course, the SCUBA air system has its advantages as well. A diver using SCUBA gear is literally "an entity unto himself," since he carries his life giving air supply on his back at all times. He can go anywhere he chooses, completely free of any ties with the world topside. There are many times when an underwater diver does not need the total freedom that is afforded by the SCUBA air system, particularly in cases in which the diver is submerged in a limited area for long periods of time. For these applications, the "Hookah" (Surface Air Supply) was invented. The Hookah air system uses no high pressure air tanks of the type worn on a diver's back. Instead, it uses a small air compressor which is located at the surface. It is commonly powered by a portable gasoline engine or electric motor, and the air is delivered to the diver via a floating air hose. With the Hookah system, the diver has an unlimited and nearly "cost free" air supply which will only stop flowing when the engine or motor that powers the compressor ceases to operate. This makes for a truly economical air system, which will quickly pay for itself when compared to the cost of refilling a SCUBA tanks every hour or so. The only operating cost for a Hookah system is fuel, since the vast majority of Hookah compressor units are gasoline powered. It is not uncommon to get two hours diving time on a single gallon of gas, which shows just how economical the Hookah air system can be. Most Hookah divers will have a partner working "topside" as a safety man, and he can refill the engine's gas tank as it starts getting low. This will enable the diver to stay submerged so long as he desires.2. Whats a "quick" and "cheap" way to find the frictional torque load on an electric motor?If you attach a wrench or other lever arm to the shaft and slowly add weight, a little at a time, until the shaft begins to turn, the weight multiplied by the distance from the center of the shaft will be the static friction. Once the shaft begins to turn, the friction will drop to the "running friction" value, and the remainder of the applied torque will be used to accelerate the flywheel. If you can determine the speed of the flywheel after a measured increment of time, you can calculate the torque used for acceleration. You will need to calculate the inertia of the flywheel, shaft, coupling, motor shaft and motor rotor. The motor inertia data may be available from the manufacturer. Rather than using a wrench for a lever arm, it would be better to attach a flexible cord or strap to the surface of the flywheel. That will give you more time to get speed vs. time data. It might be possible to get the data with a stopwatch and a hand-held tachometer, but a tachometer generator and a chart recorder, oscilloscope or computer data acquisition interface would be better. Another way to do this would be to accelerate the system to a known speed and then de-energize the motor and let it coast to a stop. The friction can then be calculated from speed vs. time data. If the starting speed is significant, there will be windage torque in addition to the friction. Windage torque is proportional to the square of speed and thus will decrease as speed decreases.3. How do you change the horsepower in an electric motor?by changing the pulley or gear on output shaft smaller gear will make more power
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