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Average Current Control of a Buck+Boost PFC Rectifier for Low Cost Motor Drives
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| Author(s) |
Gert Karmisholt Andersen |
| Abstract |
This paper analyses a two switch buck+boost
Power-Factor-Correction (pfc) recti er used in a low cost Pulse-
Amplitude-Modulated (PAM) induction motor drive. Emphasis
is placed on the control structure of the current shaping loop of
the recti er part of the motor drive. The buck+boost converter
operates either as a buck converter or as a boost converter. By
introducing simple feed forward of duty cycles and introducing
online gain scheduling, only one current shaping controller with
constant controller parameters is needed in both converter op-
erating modes. These modi cations decrease the demands to
the current controller signi cantly and they yield better current
shaping performance than a conventional current control. This
new control structure is simple and easy to implement in a low
cost motor drive. The analysis is performed analytical and is
documented by simulations. |
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| Filename: | Unnamed file |
| Filesize: | 876.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-20 by System |
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