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damper winding
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damper winding

electrical engineering
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Quick Summary

A damper winding, also known as an amortisseur, is a short-circuited squirrel-cage winding found in the pole faces of synchronous machines. Its primary function is to provide starting torque for synchronous motors, which are not self-starting.12

During startup, the damper winding allows the rotor to accelerate to near synchronous speed. Once the motor reaches synchronous speed, the main field winding is energized, and the rotor pulls into synchronism with the rotating magnetic field of the stator.2

Additionally, the damper winding has a crucial role in damping oscillations. If the rotor's speed changes suddenly due to load variations, currents are induced in the damper winding, creating a torque that opposes these speed fluctuations and stabilizes the motor. This winding is essential for both the starting and stable operation of synchronous motors.2

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2 Britannica Sources
  1. damper winding
  2. electric motor - Synchronous motors

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