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A Simple Method to Improve the Dynamic Response of Single-Phase PWM Rectifiers

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2 Author(s)
Rajesh Ghosh ; R & D Div., American Power Conversion, Bangalore ; G. Narayanan

A single-phase boost rectifier system with conventional low-bandwidth voltage loop exhibits poor dynamic response. A simple method is presented to improve the dynamic response of the rectifier without affecting its steady-state performance. A fast voltage controller is used to improve the dynamic response of the rectifier. The increased low-frequency ripple at the output of the voltage controller is filtered out using a new filter. Design methodology for the voltage loop is presented. The filter is simple enough for analog and digital implementations. Low input current distortion, fast voltage-loop response, and improved dynamic response against line and load disturbances are demonstrated experimentally on a 300-W digitally controlled boost rectifier operating at a switching frequency of 100 kHz.

Published in:

IEEE Transactions on Industrial Electronics  (Volume:55 ,  Issue: 10 )