In which type of motor a fly wheel is used during heavy loads?

Question

Question

This question was previously asked in

ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 2

Answer 1

A flywheel is a big wheel that is mounted on the same shaft of the motor, if the speed of the motor is not to be reversed. It is used in the load equalization process.
To operate flywheel efficiently, the driving motor should have drooping characteristics
The flywheel is not used with motors having constant speed motors. Hence, we can’t use flywheel along with synchronous motor as it is a constant speed motor.
However, DC shunt motor is sometimes considered as a constant speed motor but is has slightly drooping characteristics. So flywheels may be used with DC shunt motor during heavy loads.
Hence from the given options, DC shunt motor is the best suitable option as DC series & Ac series motors have raising characteristics.

Note:

For fluctuating loads, flywheels can’t be used with DC shunt, synchronous, DC & AC series motors.
It can use it along with DC cumulative compound motors and three-phase induction motors.