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Current automatic tracking control strategy of PWM rectifier

Published:2015-06-10 author:ZHOU Qing-gang1，LI You-xin1，GUO Ning-ning2 Browse: 2629 Check PDF documents

Current automatic tracking control strategy of PWM rectifier

ZHOU Qing-gang1，LI You-xin1，GUO Ning-ning2

（1. Information Engineering College of Guangdong University of Technology，Guangzhou 510006，China；

2. Jiangxi thermal power construction company，Nanchang 330001，China）

Abstract：Aiming at the problem which was the fixed width of the PWM control method of hysteresis current，which had cause several

problems，such as the switch's frequency changing greatly，the real current could not fast track the given current when the frequency was

low、the switch would consume a lot of power when the frequency was high，and so on. The rectifier's topology、the principle of current

loop and voltage loop，which under the control method of hysteresis current and the principle of three phase locked loop had been

studied. the control procedure also had been distilled. A new PWM control method of current automatic tracking was proposed，then the

mechanism of this control strategy being detailed explanation. So not only the software-Matlab being used to simulate the control process，

but also the digital signal processor-DSP28035 also being used to verify it. The results indicate that the input current and the input

voltage has the same phase，the real current can fast track the current which was given，it can realize power factor correction.

Furthermore，it proves the effectiveness and the feasibility of this control strategy.

Key words：rectifier of pulse width modulation；current automatic tracking；control strategy

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