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The net torque developed by a single-phase induction motor at starting is – (a) Pulsating (b) Uniform (c) Zero (d) None of these
By BYJU'S Exam Prep
Updated on: September 25th, 2023
The net torque developed by a single-phase induction motor at starting is zero. We only have one winding for single-phase induction motors (main winding). As a result, the magnetic field pulses, increase to a maximum value before decreasing to zero and then increasing to a maximum in the negative cycle. Because it became zero twice in a cycle, the net torque generated is zero. As a result, the starting torque of a single-phase motor is zero. that a single-phase induction motor does not self-start.
Table of content
Types of Torque
The two types of torque are static and dynamic. A torque that does not result in an angular acceleration is called static. Here are a few instances of static torque:
Static torque can be applied in a number of ways, like pushing a closed door while it is still in place and pedaling a bicycle at a constant speed when there is no acceleration.
Applications of Torque
- Any item that is subject to torque has a pivot point. The following applications are offered:
- Wrenches and Seesaws
- Gyroscopes
- When it swings, a pendulum or a parachute produces torque.
- a bicycle-riding individual
- Flying a flag atop a mast
Summary:
The net torque developed by a single-phase induction motor at starting is – (a) Pulsating (b) Uniform (c) Zero (d) None of these
A single-phase induction motor starts with zero net torque generated. For single-phase induction motors, there is just one winding available (main winding).