Title :
Random PWM inverter drive systems: theory and practice
Author :
Boys, John T. ; Andrews, Mark
Author_Institution :
Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand
Abstract :
A three-phase PWM inverter system for AC motor control using a random switching strategy (RPWM) to reduce the perceived acoustic noise from the drive is described. It allows the use of low-resolution timers with simple microcontrollers and power switching devices, by incorporating a vector-integral feedback strategy within the actual PWM waveform generator thereby ensuring that errors cannot accumulate. A theoretical analysis of. The RPWM waveforms is shown to be in close agreement with experimental observations so that power spectra can be tailored for specific applications to produce a quiet general purpose drive with essentially no price premium over a conventional one
Keywords :
AC motors; acoustic noise; electric drives; feedback; invertors; microcontrollers; noise abatement; power engineering computing; pulse width modulation; switching circuits; AC motor control; PWM waveform generator; acoustic noise reduction; low-resolution timers; microcontrollers; power switching devices; random PWM inverter drive systems; three-phase; vector-integral feedback strategy; AC motors; Acoustic noise; Control systems; Feedback; Microcontrollers; Power generation; Power system reliability; Pulse width modulation; Pulse width modulation inverters; Signal generators;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1993. Proceedings of the IECON '93., International Conference on
Conference_Location :
Maui, HI
Print_ISBN :
0-7803-0891-3
DOI :
10.1109/IECON.1993.338996
