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phase representation

In opposition of the electronics device, the FCMA in serie with the motor control the amplitude of the signal, the FCMA design is done to be all time in the none saturated zone, the result is a perfect sinosoïdal current signal with zero harmonic.

The zero harmonic garranty to have the lowest starting current and no warming motor problem.

At start the equivalent impedance of the FCMA is constant and maximum, done by the Main winding and the motor current through it.

When the motor speed increase, the cemf of the motor increase the flux in the feedback winding, as this winding is in opposition with the Main winding the total flux, so the total equivalent impedance in the module, is decreasing with the motor speed.

The design of our module, fonction of the motor data, is such as the starting current is keeping constant and the voltage at the motor terminal is continiously increasing during the motor start .

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