考虑指令电流的变环宽准恒频电流滞环控制方法

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Abstract Based on the half-bridge voltage-fed PWM converter, the relationship among tracking current, neutral-point voltage of DC capacitor and source voltage are analyzed. A transformation approach of neutral-point voltage of DC capacitor, source voltage and reference current is proposed. A reference current can be transformed into an additional component of source voltage, and a new voltage which is the sum of the additional voltage and original source voltage is obtained. We can get an improved variable hysteresis-band and quasi-constant current-tracking method using the new voltage within PWM current control for voltage converter. Using the new method, the instability of switching frequency led by the changes of reference current can be overcome. The simulation result shows the correctness of the proposed method.

Key words： Voltage-fed PWM converter reference current current control switching frequency quasi-constant hysteretic

Received: 01 November 2010 Published: 20 March 2014

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TM46

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	Xu Yonghai
	Liu Xiaobo

Cite this article:

Xu Yonghai,Liu Xiaobo. A Variable Hysteresis-Band and Quasi-Constant Current Controller with Reference Current[J]. Transactions of China Electrotechnical Society, 2012, 27(6): 90-95.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I6/90

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