在PWM变流器的逆变输出控制上采用跟踪效果好、精度高的滞环比较控制策略；

To control output of the PWM inverter, a improved hysteresis control strategy to control APF inverter is given, which can ameliorate t dynamic response and precision of compensation;

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本文还详细分析了滞环比较控制方式以及三角波比较控制方式，并进行了仿真比较。

The hysteretic loop comparator control method and the triangular wave comparison control method have been analyzed in detail. The simulation and comparison is made.

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从滞环控制方式的特点入手，详细分析了单相滞环比较控制方式的原理并计算得出了实际的器件开关频率计算式。

Starting from the characteristics of hysreresis comparison control, the principle of hysreresis comparison control and the formula of actual switch frequency are gotten.

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