In class A chopper supplying a DC motor, if the back emf of the motor increases then the motor current increases the motor current decreases the load current will remain constant None of the above

Q: The O smaller O larger the number of poles used in a stepper motor, the better the resolution

A: here we have to give relation between the number of poles and resolution.

Q: 8. Find the counter-EMF voltage of a permanent magnet DC motor when it runs at 2080 rpm. The…

A: The solution is given below

Q: A short composite  motor  draw or pulls stream a current of 50 A at a voltage of 220 V it rotates at…

A: A short composite motor is nothing but a short shunt compound motor.  The given parameters for a…

Q: how does the rotor of a 3-phase induction motor get power a-  through brushes and commutador…

A: In this question we need to choose a correct option.

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.