Fast controller for a unity-power-factor PWM rectifier |
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| Authors: | Eissa M.O. Leeb S.B. Verghese G.C. Stankovic A.M. |
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| Affiliation: | Lab. for Electromagn. & Electron. Syst., MIT, Cambridge, MA; |
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| Abstract: | This paper presents an analog implementation of a fast controller for a unity-power-factor (UPF) PWM rectifier. The best settling times of many popular controllers for this type of power converter are on the order of a few line cycles, corresponding to bandwidths under 20 Hz. The fast controller demonstrated in this paper can exercise control action at a rate comparable to the switching frequency rather than the line frequency. In order to accomplish this while maintaining unity power factor during steady-state operation, the fast controller employs a ripple-feedback cancellation scheme |
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