Modified hysteresis control with minor loops for single-phase full-bridge inverters

Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting Pub Date : 1988-10-02 DOI:10.1109/IAS.1988.25137

T. Kato, K. Miyao

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引用次数: 42

Abstract

An efficient online PWM (pulsewidth modulation) control method for single-phase full-bridge inverters is proposed. The conventional hysteresis control method has good dynamic responses, but the switching frequencies are high because it does not optimize switching patterns. Full-bridge inverters can generate +E, -E, and 0 (zero) levels where E is an input DC voltage level. The hysteresis control method does not utilize maximum freedom and it selects the output only among two levels (+E and -E). The method selects the optimum output among the three levels (+E, -E, and 0) instantaneously. The control circuit of the proposed method is very simple. Whereas the conventional hysteresis control has only one hysteresis comparator, the proposed method has two hysteresis comparators (wide and narrow loops). When a reference signal goes up, the wide-loop output becomes high and the inverter output is +E, or 0 according to the narrow-loop output. When a reference signal goes down, the wide-loop output becomes low and the inverter output is -E or 0. The method is validated to optimize the output level instantaneously and to reduce the switching times.<>

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改进的单相全桥逆变器小回路滞回控制

提出了一种有效的单相全桥逆变器脉宽调制在线控制方法。传统的迟滞控制方法具有良好的动态响应，但由于没有优化开关模式，导致开关频率过高。全桥逆变器可以产生+E、-E和0(零)电平，其中E为输入直流电压电平。迟滞控制方法不利用最大自由度，它只选择两个电平(+E和-E)之间的输出。该方法在三个级别(+E、-E和0)中即时选择最优输出。该方法的控制电路非常简单。传统的滞回控制只有一个滞回比较器，而该方法有两个滞回比较器(宽回路和窄回路)。当参考信号上升时，宽环输出变高，逆变器输出为+E，根据窄环输出为0。当参考信号下降时，宽环输出变低，逆变器输出为-E或0。实验结果表明，该方法能快速优化输出电平，减少开关次数。

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Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting

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