In a wound rotor motor, what is the function of brushes?

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Prepare for the Michelin ECT Exam. Study with comprehensive flashcards and multiple choice questions, each with detailed hints and explanations. Get ready to excel in your exam!

Multiple Choice

In a wound rotor motor, what is the function of brushes?

Explanation:
In a wound rotor motor, brushes maintain contact with the slip rings to carry current into the rotor windings. The rotor windings are connected through slip rings, which rotate with the rotor, and the stationary brushes press on these rings to provide a continuous electrical path from an external circuit (often via resistors) into the rotor. This setup lets you control rotor resistance and starting torque. The brushes don’t support bearings or isolate the rotor; their job is to keep that electrical connection intact.

In a wound rotor motor, brushes maintain contact with the slip rings to carry current into the rotor windings. The rotor windings are connected through slip rings, which rotate with the rotor, and the stationary brushes press on these rings to provide a continuous electrical path from an external circuit (often via resistors) into the rotor. This setup lets you control rotor resistance and starting torque. The brushes don’t support bearings or isolate the rotor; their job is to keep that electrical connection intact.

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