Patent ID: 9509241
Filing Date: 2016-11-29
CPC Classification: H02P

Claim Text:
1. A control method used in a control unit of a power converter connected by three output phases to a synchronous electric motor, said control unit being configured to implement a main control law for controlling the synchronous electric motor, wherein said control method is configured to replace said main control law upon starting of the synchronous electric motor and wherein said control method comprises: a first step of determining the voltages to be applied to the output phases depending on a reference current, said reference current having a value at least higher than a first threshold value necessary for starting the synchronous electric motor; a second step of determining a frequency to be applied to the stator depending on a stator frequency, said stator frequency being chosen higher than a second given threshold value; applying the first step and the second step for a given duration, at least equal to the reciprocal of the stator frequency, so as to allow the rotor of the synchronous electric motor to rotate at the stator frequency applied; a step of switching the synchronous electric motor to the main control law once the rotor rotates at a speed corresponding to said stator frequency.