What is FCMA Soft Starter?

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 .