METHOD FOR SYNCHRONIZING A SYNCHRONOUS RELUCTANCE ELECTRIC MACHINE

摘要

A method of synchronizing a synchronous reluctance electric machine wherein the machine has no speed and/or residual magnetization voltage sensor and comprises power terminals and rotating masses whose mechanical rotation frequency (f&Mgr;) is subjected to speed transients caused by power cut-off conditions. The method comprises at least one step of a) applying a control voltage (Vc) with predetermined amplitude (vc) and duration (Tc) to the terminals after the transients and one step of b) detecting the electric current induced (Ii) by the control voltage (Vc), the current induced (Ii) by the voltage (Vc) having a harmonic spectrum (S) variable according to the frequency differential between the frequency of the control voltage (fc) and the mechanical rotation frequency (f&Mgr;) of the rotating masses, to restore power and synchronous rotation control of the machine (E).