Running Induction Motors on frequencies other than their Design Frequency.

Induction motors use an iron core and require flux in the iron tooperate. In order to achieve the commercial goals of smallest size andlowest price at best efficiency, induction motors are designed tooperate at a high level of flux in the iron. The flux is determined bythe turns, voltage and frequency. In a modern motor, if the flux isincreased by a small amount, the iron losses increase and the