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what are the applications of ac dynamic braking?
- I assume that you are asking about dynamic braking of an AC motor. The term “dynamic braking” is usually applied where braking energy is dissipated as heat in resistors. Where braking energy is returned to the power supply, the term “regenerative braking” is usually used. “DC braking” of an AC induction motor refers to braking by applying DC current to the motor windings. Dynamic and regenerative braking can only be implemented when the motor is controlled by a variable frequency drive (VFD). Because the braking energy can not be reused, dynamic braking is used in applications that do not generate a lot of braking energy or do not have a means for storing braking energy or using it elsewhere. A relatively simple control unit is used to connect the braking resistors and modulate the braking current when braking is required. Regenerative braking requires a more complicated control unit unless the VFD is DC powered.s
Can I rotate an AC motor spindle manually? When the power supply not given.?
- Yes. In fact, when the motor is driven manually, it becomes an electric generator.s
AC versus DC motors.?
How do you decrease the rpm of a AC motor that has a heavy load?.?
- Could I put a dimmer switch in series with the motor until it puts out 60VAC? it depends on the exact type of motor. universal or ac/dc motors can be speed controlled, but synchronous motors spin at a rate determined by the supply FREQUENCY so changing the voltage would do no good. Could I put a dimmer switch in series with the motor? no, dimmer switches produce spikes which would do your motor lots of no good, and produce catastrophic interference. And since its an inductive load you would also blow the dimmer.s
Why is it that on Ebay, most AC motors are rated for more voltage than DC motors?
- You need some sort of power source to power the motor. The most common AC voltages (in households at least) are 120V and 240V, so it makes sense that many AC motors will be designed to run off of those voltages. Most DC sources are batteries, so not surprisingly, DC motors will be designed to run off of typical battery voltages (i.e. 9V, 12V, 24V, 48V).s
anybody know how to generate 353kw of electric power for a motor that will run a car?
- nope, ain't gonna happen. first you would have your own class with no one to race or they will say internal combustion engines only. second what you gain in power you will lose in battery weight and finally like putting a jet engine in a car, it will be an oddity at best.s
What does permanent magnet brushless motor and brushless DC motor mean?
- Speed control system composed of permanent magnet synchronous motor used to be called the sinusoidal permanent magnet synchronous motor (PMSM) speed control system; and the trapezoidal wave (Fang Bo) speed control system composed of permanent magnet synchronous motor, the principle and control methods of DC motor and similar, so this system for brushless DC motor (BLDCM) synchronous motor speed control system, Fang Bo is also known as the brushless DC motor (or square wave motor).s
How did they convert ac to dc current on electric train transformer when they didnt have transistors then?
- Electric Train Transformers
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