Minimisation of reactive component values in back-to-back converters

Author

Wheeler, N.J. ; Zhang, H. ; Grant, D.A.

Author_Institution

Ind. Electron. Group, Bristol Univ., UK

fYear

1994

fDate

26-28 Oct 1994

Firstpage

240

Lastpage

245

Abstract

The back-to-back AC-AC power converter, consisting of two PWM inverter bridges with a common DC link, is considered as a future replacement for the conventional inverter drive. The topology offers the advantages of high power factor and regenerative capability. The factors determining the size of the reactive components are discussed. Guidelines for selecting components are derived from consideration of the required DC link voltage, the input current quality, the stability of the DC link voltage control loop, and the transient response of the system. Simulation shows the feasibility of implementing a 7.5 kW converter with a DC link capacitance of 50 μF. This result suggests that it may be possible to use nonelectrolytic capacitors in the DC link

Keywords

AC-AC power convertors; PWM invertors; PWM power convertors; bridge circuits; control system analysis; power capacitors; power factor; stability; transient response; voltage control; 50 muF; 7.5 kW; AC-AC power converter; DC link; PWM inverter bridges; back-to-back converters; capacitance; input current quality; link voltage; power factor; reactive component; regenerative capability; selection guidelines; simulation; size; stability; topology; transient response; voltage control loop;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics and Variable-Speed Drives, 1994. Fifth International Conference on

Conference_Location

London

Type

conf

DOI

10.1049/cp:19940971

Filename

341576