Abstract: The invention is a drive system comprising an inverter comprising N arms, each arm including an upper half-arm and a lower half-arm each comprising at least one switching module, a rotary machine connected to the inverter, including a rotor having at least one magnetic element made from a modular magnetization material and a control device which, during magnetization controls the inverter to simultaneously for each one of m arms, set each switching module of the upper half-arm and turned on and each switching module of the lower half-arm is turned off, for each one of k other arms, set each switching module of the upper half-arm to be off and each switching module of the lower half arm to be on, and for each of the remaining arms, set each switching module to be off.

Abstract: In an inverter system (1) associated with an electric machine (2), a control device (9) involves a pulse width modulation technique with a variable frequency in order to optimize the efficiency of the system. According to the invention, the current switching frequency values are limited according to other criteria, among which noise or the torque deformations of machine (2) or the electrical loads imposed on a capacitor (8) of the filter stage (4).

Abstract: The present invention is a method of determining at least two equivalent insulation resistances for an electric system including a power source (2), an inverter (11), an electric load (3) and a measurement circuit (5). Measurements are performed during operation of the electric system, when the controlled switches of inverter (11) are in a zero sequence. The present invention also relates to a control system implementing same.