Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
The direction of rotation of the synchronous motor can be reversed by reversing
The polarity of the rotor poles
Field winding
Supply phase sequence
None of these
Supply phase sequence
Quick Trick: To quickly determine the direction of rotation change in synchronous motors, remember that reversing the supply phase sequence alters the motor's magnetic field direction.
To quickly determine the direction of rotation change in synchronous motors, remember that reversing the supply phase sequence alters the motor's magnetic field direction.
Understand Synchronous Motor Basics
In a synchronous motor, the direction of rotation is determined by the phase sequence of the AC supply voltage applied to its stator.
Recognize Importance of Supply Phase
The sequence in which the supply phases arrive at the motor affects the magnetic field's rotation direction.
Identify Correct Option
Reversing the supply phase sequence alters the magnetic field direction, thereby reversing the motor's rotation.
A: Reversing rotor pole polarity is not a method for most synchronous motors; B: Field winding direction does not affect phase sequence; D: There is a correct option.
C is correct because reversing the supply phase sequence changes the direction of the magnetic field, which in turn reverses the rotation of the synchronous motor.
In electrical engineering, always consider the role of phase sequence in AC machines, as it frequently appears in various questions related to motor operation.