Title :
A novel line synchronisation method for PWM rectifiers-theory and application
Author_Institution :
Control Techniques, UK
Abstract :
A control method has been described that allows a standard AC motor drive to be used as a PWM rectifier without additional hardware. By using the PWM modulator output voltage to give indirect supply voltage sensing, phase information is available at every sample. When used with a PLL, this gives robust line synchronisation as has been demonstrated. Pre-start tests, required to pre-load various parts of the control system when starting, have been described and proven to give excellent supply synchronisation. Field experience with systems up to 1 MW has shown the method to be very reliable
Keywords :
AC motor drives; AC-DC power convertors; PWM power convertors; control system synthesis; machine control; machine testing; machine theory; phase locked loops; rectifying circuits; robust control; synchronisation; voltage control; AC motor drive; PLL; PWM modulator output voltage; PWM rectifiers; control system; field experience; indirect supply voltage sensing; line synchronisation method; phase information; robust line synchronisation;
Conference_Titel :
Power Electronics and Variable Speed Drives, 2000. Eighth International Conference on (IEE Conf. Publ. No. 475)
Conference_Location :
London
Print_ISBN :
0-85296-729-2
DOI :
10.1049/cp:20000284
