DocumentCode :
1913378
Title :
Modelling and control of a high power pulse width modulated synchronous rectifier
Author :
Singh, Tejinder ; Dewan, S.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fYear :
1993
fDate :
2-8 Oct 1993
Firstpage :
957
Abstract :
The authors present a detailed analysis of a high-power pulse-width-modulated (PWM) synchronous rectifier, operated at low switching frequency. A low-frequency PWM technique is used to control the high power rectifier. Synchronous pulse width modulation based on precalculated and stored optimized pulse patterns is used. The proposed configuration provides DC voltage equal to that of a conventional rectifier. This eliminates the use of a transformer at the input of the rectifier. A general model for the overall system is obtained. The derived low-frequency model presents a time-variant and nonlinear system. Using transformation of the reference frame and small-signal linearization around the steady-state operating point, a linear system is obtained. Various transfer functions are derived from the resultant linear, time-invariant system. The transfer functions derived are utilized in the design of the feedback regulators. Using the proposed model, a phase and amplitude control strategy is used to control the input power factor and DC link voltage. Predicted results are verified by computer simulation and PECAN
Keywords :
circuit analysis computing; control system analysis computing; digital simulation; feedback; optimal control; phase control; pulse width modulation; rectifying circuits; switching circuits; transfer functions; voltage control; DC link; DC voltage; PECAN; PWM; amplitude control; computer simulation; design; feedback regulators; input power factor; linear system; model; nonlinear system; optimized pulse patterns; phase control; reference frame; small-signal linearization; steady-state operating point; switching frequency; synchronous rectifier; time variant system; transfer functions; transformation; voltage control; Nonlinear systems; Power system modeling; Pulse transformers; Pulse width modulation; Rectifiers; Space vector pulse width modulation; Steady-state; Switching frequency; Transfer functions; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
Type :
conf
DOI :
10.1109/IAS.1993.299014
Filename :
299014
Link To Document :
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