Building a Simple DC Motor

Read the battery datasheet. Those little 9 V consumer batteries with the snap on leads are not good for delivering this kind of power.Measure the battery voltage when connected to your motor, and you will probably find it is close to 0. This may be the case even if the battery measures about right when open circuit. Use a benchtop power supply. Something that can put out a few amps at 12 V should be good. Do not use a car battery because those are not current-limited. If you cause a short, the car battery will deliver enough current to melt or explode something. A benchtop supply with current limiting at a couple of amps should provide enough power, but be safe when the inevitable short happens.It is amazing that thing worked at all. Obvious problems:

1. What is magnetic interlocking in a synchronous motor?

The word interlock usually means to prevent something from happening. In this application I suspect it is describing a circuit that prevents application of the main field winding until the rotor has reached about 95% of synchronous speed. Recall that most synchronous machines start as induction motors using amortisseur windings. The damper windings get the motor started but they are not designed to operate the motor at full power for any length of time. Consequently, the interlock may also time out if the motor does not achieve synchronous speed within a certain amount of time.On the other hand, the word interlock means to join together. In a synchronous machine the rotor's magnetic field moves in lockstep with the stator's field. They are interlocked. Personally, I like to think of this a a rubber band. There is always a small torque dependent angle between the two fields. Don't overload a synchronous motor of this torque angle will be excessive and the motor will stall - the rubber band will break...FUN FACT: Programmable Logic Controllers (PLC) should be programmed with software interlocks to ensure the proper motor starting sequence and to prevent the motor from other damage such as an excessive number of start without time for the amortisseur winding to cool.Regards,APDahlenWhat is magnetic interlocking in a synchronous motor?

2. Do you need an outboard motor if you have an Inboard motor?

LISTEN TO TRUNORTH! Run do not walk away from this deal. Sounds like the seller has removed the outdrive and is selling the boat as is. There are straight inboards - with a prop shaft and prop in a direct drive or through a v-drive or other transmission; they will steer with a rudder. There are inboard/outboard - an inboard motor and an outdrive unit with the prop that is connected to the drive through the transom; they steer by the outdrive moving to change the direction of the prop. And there are Outboard motors. Do not buy a used boat with out try it out! If you do not know about boating and boats take someone with you. There are many great deals on boats right now and there will be one that will meet your needs if you shop around. Good Luck - Boat Safe!

3. Controlling brushed motor speed with variable load with a PWM

Your idea is wrong and wo not work. But there is a very similar idea that will work."a brushed motor with a constant-voltage power supply, it will always rotate at about the same speed" No. If you load it a lot, it will slow down a lot. Your idea is to basically monitor the average voltage across the motor terminals and adjust the PWM so that a constant average voltage is applied to the motor in order to maintain constant speed with torque (this would also require monitoring the battery voltage as well). But this wo not maintain constant speed with torque. It will just maintain an ratio between battery voltage and average voltage applied to the motor as the battery voltage decreases as it is drained. Also, if this is your goal it's easier to just to measure the battery voltage directly and adjust the PWM accordingly. No need to measure the messy voltage across motor terminals. But motor speed will still change as torque changes. What you really want is to measure the motor's back-EMF (BEMF) and adjust the PWM to keep the BEMF constant. The BEMF is the voltage a motor generates when it is coasting. In other words, this is the voltage the motor generates when it is being back driven and acting as a generator. But now the question is, how do you measure the voltage across the motor while it is coasting coasting if you are driving it with a PWM waveform so it is not coasting?Well, first, you do not want to continuously being sampling the motor terminal voltage in an uncontrolled manner while PWM is happening because the drive voltage (when the switches are closed and sending current through the motor) are mixed in with the BEMF voltage (when the switches are open and current is not going through the motor)If you want to sample the BEMF while PWMing the motor you need to do the sampling when you know both HI side switches are open so that the motor is not being driven, but you want one LO side switch to be closed so that you are measuring with respect to GND.Your MCU may allow your PWM timer to trigger ADC samples so you can sample it directly and ignoring it when the motor current is not being forced through the motor and ignore it at all other times. Might need some RC filtering but not something like an LC. If you can not do this, there are less elegant work arounds like having the PWM signal drive interrupts that cause the ADC to take a sample. At worst, you could directly feed the PWM signal from an output pin directly back into an interrupt pin

Articles recommandés
I Bought a Motorbike (TVS) Recently and Observed That the Engine Heats Up a Lot. Is It Because the B
The engine gets hot when you ride more in low gears. Once u start riding good in top gears you wo not heat your engine that much as before.And also check wheather the engine oil level is at maximum. Low level of engine oil also heatsup more. As its new bike everything will be right but then too just check oil level.And if the cooling systerm of bike is water cooled or oil cooled just check the water and oil level too.1. What type of engine oil is used in a Suzuki Swift /Geo?Suzuki Swift 20002. TVS Apache Engine Oil Leakage ?I have purchased apache bike RTR 160 just before four month and i am facing a extreme problem of its gearbox i also given for service once. but the problem is again created after just a few kilometer drive so please provide me solution for that or any instruction i will very thankful to you3. What kind of engine oil should one use in a diesel?call your local toyota dealership and ask them. Over the years, they may have changed their recommended fluid types4. If i flood my engine with oil will that will help free up the pistons?No. Instead, remove the spark plugs and put a glug (like an ounce or so) of oil in each cylinder and let it sit at least 15 minutes. Put oil in the crankcase - three quarts is about right for this. Try cranking the engine. If it does not crank you will have to use a socket on the crank bolt to break the rings loose. Continue cranking for 30 seconds to get the oil flowing. Put the plugs back in and start the engine, then let it idle for a minute or so. Drain the oil (it will be really nasty) and replace the filter. Refill the oil and see how it goes. Hopefully the engine will have survived okay because it was not running when it seized. If you hear a tap that becomes a louder banging in a week or so you will have to get the rod bearings replaced before the crankshaft is ruined.5. Can I use 2-stroke engine oil for a 4-stroke engine?That is not really a good idea. First off, two stroke oil is a bit different than ordinary four stroke oil, as it is designed to mix with gasoline and lubricate all the moving parts that a four stroke engine does with splash or pressurized oiling. Quite often the two stroke oil is designed to mix one part of oil with up to fifty parts of gasoline, so it is going to be rather thick to splash around, or to pump easily to all the bearing surfaces and such6. Will SAE 10w-40 Engine Oil work in a John Deere LX172 Mower?Here is the rule of thumb for JD mower engines. On non-pressurized systems use a straight 30 weight in the summer. On motors that have full pressure systems you can run 10/30 or 10/40 in the summer. Any engine with an oil filter is a full pressure system by the way. Some of the early Kawasaki JD engines did not have filters but were full pressure systems anyhow. They just skimped on the parts!7. are engine oil and motor oil the same thing?Yessir, they are the same thing. Make sure though that you are using the correct wieght of motor oil. 10W-30 is usually a good bet8. What kind of engine oil?no just a good brand name9. Help!! Water poured in Engine Oil?blown head gasget...get compression test and leak down test...its gona cost u....800 plus10. Engine Oil for my Honda Accord 87?use Valvoline 30 Waite oil and if it smokes use Valvoline20-50 racing oil. my brother has a 95 Acura legion that has over 200,000 miles on it and he used 30 waite untill it started to smoke then he used the 20-50 and now it does not smoke11. What color is engine oil leak?1. Trannie Fluid is Transmision Oil - RED 2. Engine Oil if new - LIGHT IN COLOUR ALMOST CLEAR YELLOWISH depending on brand 3. Old Engine oil is Black 4. If the engine oil become tooo old it goes black like your is now & when its syrup like its very ancient *As for the leak, have them check your "Sump Drain plug washer", it might be worn & would needs a new copper washer. That might resolve your oil leak problem YOU'VE BEEN RIPPED OFF - BESIDES YOUR ENGINE OIL IS OLD NEEDS TO BE REPLACE
The Oldest Womens Motorcycle Club Is Strictly Feminine and also Badass
What Is the Best Starter Cruiser Motorcycle?
Hooking Up a Desk-top Pc in a Motor Home, Is It Possible?
Maximum Value of Back Emf in Dc Motor?
The Brushless Motor of Coffee Machine Can Solve the Difficulties of Traditional Motor
Design of DC Motor Speed Regulation with PIC16F874 Single Chip Microcomputer As the Central Processo
Strongest DC Motor I Can Find in the 500-750 Gram Range?
Will Anything Go Wrong If I Put to Much Oil in My Motorcycle?
How to Die Down Motorcycle Saddle Bags That Are a Little too Big and Move Around a Little too Much?
related searches
General Motors Gives the Iconic Chevy Blazer a Reboot with Help From This Young, Black Aerodynamics
Identifying American (Mercury) Mariner Outboard
Wiring a 3 Phase Motor?
Problems with Central Heat and Air.?
Yes, That Elephant Can Dance: General Motors Chief Talent Officer on Innovation at Scale
What Is a Disable Input for on a Motor Controller For?
Advanced Materials for Electric Motor and Generator Windings
How to Use a Trolling Motor with a Foot Pedal Like a Pro
Whats the Difference Beetween a Motor and an Engine?

Copyright © 2020  Shandong Abusair Agricultural Machinery Co,. Ltd- |  Sitemap

Multifunctional farm Abusair machinery  |  Tea Professional Cultivator farm machinery