A low cost reversible rectifier

Author

Gosbell, V.J. ; Cugaly, P.P.

Author_Institution

Dept. of Electr. & Comput. Eng., Wollongong Univ., NSW, Australia

Volume

1

fYear

1996

fDate

17-20 Jun 1996

Firstpage

508

Abstract

A study is made of a circuit which offers a cheap, efficient four quadrant rectifier such as required for the line side of an AC motor drive. The circuit consists of a normal capacitor-filtered rectifier with SCRs connected in antiparallel with the diodes. The circuit has been described previously, but the experimental efficiency for regeneration did not exceed 40%. A mathematical model is derived for important electrical quantities by neglecting their harmonic components. The model is confirmed by both simulation and experimental work on a low power prototype. The model allows a determination of the optimum operating point for the circuit with the aim of maximizing efficiency and meeting practical constraints on the SCR extinction angle, the capacitor voltage and line current harmonics. Efficiencies of 75-80% are suggested by the model and verified experimentally. It is shown that line resistance is important in allowing the circuit to regenerate at practicable values of DC-side voltage

Keywords

AC-DC power convertors; harmonic distortion; power semiconductor diodes; power semiconductor switches; power system harmonics; rectifying circuits; switching circuits; thyristor convertors; 75 to 80 percent; AC motor drive; SCRs; capacitor voltage; capacitor-filtered rectifier; extinction angle; four quadrant rectifier; harmonic components; line current harmonics; mathematical model; optimum operating point; reversible rectifier; AC motors; Capacitors; Circuit simulation; Costs; Diodes; Mathematical model; Rectifiers; Thyristors; Virtual prototyping; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 1996. ISIE '96., Proceedings of the IEEE International Symposium on

Conference_Location

Warsaw

Print_ISBN

0-7803-3334-9

Type

conf

DOI

10.1109/ISIE.1996.548541

Filename

548541