Title :
Filter design method for a PWM feedback inverter system
Author :
Karybakas, C.A. ; Kosmatopoulos, C.A.
Author_Institution :
Dept. of Phys., Aristotelian Univ. of Thessaloniki, Greece
fDate :
6/1/1993 12:00:00 AM
Abstract :
A novel approach to filter design for a closed-loop, pulse-width-modulated (PWM) DC-AC inverter system driving an RL load is investigated. The system has a rectangular hysteresis in the forward path and it is closed by current feedback. When it is excited by a sinusoidal input reference, it provides square pulses that produce a nearly sinusoidal current in the load. Using a describing function technique, design equations for the filter are derived. The data needed for the filter evaluation are the amplitude of current ripple and the frequency of square pulses delivered by the power bridge. System simulation and experimental results show that the design of the filter can be based on the method proposed and that the filter can provide a significant reduction of current ripple, or otherwise a significant reduction of switching frequency
Keywords :
feedback; filters; invertors; network synthesis; pulse width modulation; PWM feedback inverter; RL load; amplitude; current ripple; describing function technique; filter design; network synthesis; rectangular hysteresis; square pulses; switching frequency; Bridges; Design methodology; Equations; Feedback; Filters; Frequency; Hysteresis; Pulse inverters; Pulse width modulation inverters; Space vector pulse width modulation;
Journal_Title :
Industrial Electronics, IEEE Transactions on
