ABB High Voltage Induction AC Motor

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Q:Why are AC motors the most commonly used motor in industry, and not DC motors?
AC motors are commonly used in the industry because AC supply is readily available . AC motors are very rugged and easier to maintain. They don't need armatures and carbon brushes.
Q:Please define the Synchronous & Asynchronous Generators?
The most general definition is that the speed of rotation of synchronous machines is directly a function of the frequency of the system on which they are applied. By contrast, the speed of rotation of asynchronous machines is not directly a function of system frequency, but is more nearly a function of load.
Q:can a AC motor be made to DC?
Not really, get yourself a permanent magnet motor. To convert an AC motor to DC would require a major rework of the motor.
Q:How to connect an AC brushless motor to a transformer?
I don't think this motor will work very well as a generator. .
Q:What is the difference between these two motors.?
An electric motor turns because of magnetic force exerted between a stationary electromagnet called the stator and a rotating electromagnet called the rotor. Different types of electric motors are distinguished by how electric current is supplied to the moving rotor. In a DC motor and a slip-ring AC motor, current is provided to the rotor directly through sliding electrical contacts called commutators and slip rings. In an induction motor, by contrast, the current is induced in the rotor without contacts by the magnetic field of the stator, through electromagnetic induction. An induction motor is sometimes called a rotating transformer because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Unlike the normal transformer which changes the current by using time varying flux, induction motors use rotating magnetic fields to transform the voltage. The current in the primary side creates an electromagnetic field which interacts with the electromagnetic field of the secondary side to produce a resultant torque, thereby transforming the electrical energy into mechanical energy. Induction motors are widely used, especially polyphase induction motors, which are frequently used in industrial drives. In Tesla's motor, the field generator was spinning and the magnets were static
Q:Question about motors??? (please help)?
1) DC motors have a commutator whilst AC motors do not. 2). The torque generated by current in the stator winding reacting with the magnetic field produced by current in the rotor. In the induction motor the rotor current is driven by voltage induced by the field produced by the stator winding currents - hence the name induction motor.
Q:what is the ac blower motor resister for.?
Keep in mind even with a bad resistor you should ALWAYS have HI mode......because HI bypasses the resistor and supplies battery voltage to the blower. Unplug resistor and check for power from the fan speed switch if you don't see any action you need a switch or have a bad fuse.
Q:My oscillating fan starts up super slow then after a few minutes starts working normally?
There may be a large amount of dust inside the motor keeping the shaft from spinning freely. It also may be that the motor does have a problem. Is the humming noise much louder than normal? Usually this is a sign the motor is failing. Note that when the blades are spinning slowly, there is a chance the motor could overheat and possibly catch fire. Just to be on the safe side I would replace the fan. It also could be a problem with the oscillating mechanism. The fan motor also powers the oscillating mechanism. This mechanism could be bound up keeping the motor from spinning at its normal speed. Usually there is a knob or lever that disengages the oscillating feature. Try disengaging this and see if the problem goes away.
Q:what is the amps of a normal ac motor?
Depends which motor. Bigger ones will draw more.
Q:what are the applications of ac dynamic braking?
Do you mean vehicle braking? Not as good as DC dynamic braking, which for vehicles, means you can recover the energy and store it in a battery. AC, you have to dissipate it in a resistor or in the generator itself.

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