Nick Ridgway
If the feedback controller were to operate at 500Hz rather than being referenced to the mains at 50Hz, then there would be no problem with the smaller motor, as it could operate faster than the motor could change speed. However, not every modeller could cope with the sound of B above middle C coming out of models all day long.
Siemens experimented with variable frequency drive on DC traction in Germany recently. The variable frequency turned out to be the German national anthem… 😉
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This reply was modified 1 year, 9 months ago by
Nick Ridgway.