Which motor Cannot be started on no load?

A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage. The motor can be damaged by overspeed.

Which motor Cannot be started on no load Mcq?

Therefore if the DC Series Motor is started at No Load then the speed of DC Series Motor will become dangerously high which will definitely damage the DC Series Motor.

Which motor should be started only with load?

But practically the motor will accelerate to very high speed , which will damage the motor. But if you start the motor with the load, you are actually reducing the starting speed hence the motor runs safely. Since series motors has this property it is used in trains to pull high load.

Which can be started on no load Unlike DC series motor?

Unlike DC series motor, DC compound motor can be started on no-load. Explanation: Cumulative motor takes best from shunt motor and series motor as well. Due to shunt field flux component, DC cumulative motor can be started on no load.

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Which motor has highest no load speed?

Explanation: At no load, armature current tends to zero, flux φ tends to zero, where speed is inversely proportional to the flux, speed will tend to infinity. Thus, no load speed of DC series motor is highest.

Can you start a series motor without load if no why?

A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage.

What will happen when DC shunt motor is started with load?

Answer : Starting current will be very high so motor will take more current from supply. It may damage the armature winding.

Why DC series motor develops a high starting torque?

Why DC series motor produce high starting torque? The torque of the DC series motor is proportional to the square of the armature current. That is why DC series motor has high starting torque. The DC series motor produces the highest torque among all kinds of motors.

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