Patent ID: 9473062
Filing Date: 2016-10-18
CPC Classification: H02P

Claim Text:
1. A method for controlling a controlled switch operating a power supply of an electric motor from an AC voltage source, the method comprising: determining a characteristic of a variation of a voltage value across terminals of the controlled switch, the characteristic of the variation of the voltage value being a constant period of voltage value variations; determining a first time range based on the constant period of the voltage value variations, the first time range being less than the constant period of the voltage value variations; outputting a control signal to actuate closure of the controlled switch during the first time range; and using a triggering time value defining a second time range, the second time range being the constant period of the voltage value variations, and the second time range being divided by a determined controlled switch closing commutation angle, wherein said outputting the control signal to actuate closure of the controlled switch takes place as soon as a time common to the first time range and to the second time range occurs.