Title :
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
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;
Conference_Titel :
Power Electronics and Variable-Speed Drives, 1994. Fifth International Conference on
Conference_Location :
London
DOI :
10.1049/cp:19940971
