Filtering the phase voltages of the frequency converter in the identification of the parameters of three-phase asynchronous motor

Abstract

The expediency of application of active filters Butterworth third order to highlight the basic harmonic of the phase voltages of a two-level frequency converter in the identification of the parameters of three-phase asynchronous motor is shown. For the implementation of the identification algorithm it is necessary to convert the output voltages of the filters in the voltage phases of the stator winding of the generalized electric machine. It is experimentally determined that the presence offilters low frequency does not introduce significant distortion and allows to obtain the necessary shape of the phase voltages of the generalized electric machine.

Keywords

• identification of parameters
• generalised electric machine
• coordinate transformation
• frequency converter
• asynchronous three-phase motor
• the butterworth filter
• pulse width modulation