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 includes power terminals and rotating masses whose mechanical rotation frequency is subjected to speed transients caused by power cut-off conditions. The method includes at least one step of applying a control voltage with predetermined amplitude and duration to the terminals after the transients, and one step of detecting the electric current induced by the control voltage, the current induced by the voltage having a harmonic spectrum variable according to the frequency differential between the frequency of the control voltage and the mechanical rotation frequency of the rotating masses, to restore power and synchronous rotation control of the machine.

主权项

1. A method of synchronizing a synchronous reluctance electric machine, wherein said electric machine (E) is speed and/or residual magnetization voltage sensorless and comprises power terminals (T) and rotating masses (M) whose mechanical rotation frequency (fM) is subjected to speed transients caused by power cut-off conditions, the method comprising:
applying a control voltage (VC) with predetermined amplitude (vC) and duration (TC) to the power terminals after the speed transients, for inducing an electric current (Ii), wherein said electric current has a harmonic spectrum (S) that is a function of a frequency differential between a frequency (fC) of said control voltage (VC) and a mechanical rotation frequency (fM) of the rotating masses; and detecting said induced electric current (Ii) to restore power and synchronous rotation control of the electric machine (E), wherein said harmonic spectrum (S) of said induced current (Ii) has substantially null or negligible harmonic components in an audible range, in response to the application of said control voltage (VC) to the power terminals (T).