10. PM motors used in power windows, mirrors, and seats can be reversed by

A. using a relay and a two-way clutch.
B. grounding the motor to the body of the vehicle.
C. reversing the polarity of the current to the motor.
D. sending current to a reversed field coil.



Answer :

Final answer:

Reversing the direction of a PM motor is achieved by reversing the current polarity using a DPDT switch, crucial for various applications like automatic car gates.


Explanation:

Reversing the direction of a PM motor like those used in power windows, mirrors, and seats is accomplished by reversing the polarity of the current to the motor. This change in current direction alters the motor's rotation, making it move in the desired direction.

The direction of current in the motor can be controlled using a double-pole, double-throw (DPDT) switch. When the current flows in one direction through the motor, it rotates in one direction, and when the current is reversed, the motor turns in the opposite direction.

This process of reversing the current direction is essential for various applications, including automatic car gates powered by electric motors, where changing the motor's rotation direction is necessary for specific functions.


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