DocumentCode :
3188413
Title :
Pulse based dead time compensator for PWM voltage inverters
Author :
Leggate, David ; Kerkman, Russel J.
Author_Institution :
Allen-Bradley Co., Mequon, WI, USA
Volume :
1
fYear :
1995
fDate :
6-10 Nov 1995
Firstpage :
474
Abstract :
The dead time necessary to prevent the short circuit of the power supply in pulse width modulated (PWM) voltage inverters for AC drives results in output voltage deviations. Although individually small, when accumulated over an operating cycle, the voltage deviations are sufficient to distort the applied PWM signal. This paper presents a new method to correct for the dead time deviations. The pulse based compensator is less hardware and software intensive than other dead time compensation methods providing a low cost solution. The pulse based technique is developed by analyzing the effects of dead time on a pulse by pulse basis and correcting each pulse accordingly. The technique is evaluated through simulation and experimental results. Other compensation methods are evaluated and the results compared with the pulse based technique. This comparison indicates previous methods can produce magnitude and phase errors in the applied terminal voltage, whereas the proposed method compensates for the dead time without significant magnitude and phase errors in the terminal voltage of PWM voltage source inverters
Keywords :
AC motor drives; PWM invertors; compensation; feedback; power supplies to apparatus; AC drives; PWM voltage inverters; compensation methods; current feedback compensation; magnitude errors; phase errors; power supply; pulse based dead time compensator; pulse width modulated voltage inverters; short circuit prevention; terminal voltage; voltage compensation; Costs; Distortion; Hardware; Pulse circuits; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Pulsed power supplies; Space vector pulse width modulation; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1995., Proceedings of the 1995 IEEE IECON 21st International Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3026-9
Type :
conf
DOI :
10.1109/IECON.1995.483455
Filename :
483455
Link To Document :
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