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Electric angle and mechanical angle

Latest Updated:08/01/2007

Question:

Electric angle and mechanical angle

Answer:

The angle of the current that a driver for a stepper motor causes to flow through the coil of a stepper motor is called an electric angle, and the angle the motor actually revolves is called a mechanical angle.
ake a stepper motor having eight poles, two phases, and 36 teeth, for example. If an AC current flows through a pole for one period (360° of electric angle), the motor actually revolves 10 degrees (mechanical angle) (= 360 degrees ÷ 36 teeth).
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