VOLTAGE COMPENSATING METHOD FOR CONVERTER

摘要

A voltage compensating method is applied to a converter for converting a DC voltage into an AC voltage. The converter includes a first switch module, a second switch module, and an inductor. In a first dead time period, detect a first current value related to the inductor. According to the first current value, calculate a second current value and a third current value related to the inductor. According to polarities of the first, second and third current values, determine an output mode of the converter indicating a voltage compensation model after the first dead time period. According to the voltage compensation model, the first current value, and the second current value or the third current value, calculate a voltage compensation value. In a second dead time period, adjust a switching time for the first switch module and the second switch module according to the voltage compensation value.

主权项

1. A voltage compensating method applied to a converter that converts a DC voltage into an AC voltage, outputs the AC voltage to an external AC power source, and comprises a first switch module, a second switch module, and an inductor, the voltage compensating method comprising:
detecting a first current value related to the inductor during a first dead time period; calculating a second current value and a third current value related to the inductor, according to the first current value; determining an output mode of the converter after the first dead time period according to polarities of the first current value, the second current value and the third current value, the output mode of the converter indicating a voltage compensation model; calculating a voltage compensation value according to the voltage compensation model, the first current value, and the second current value or the third current value; and adjusting a switching time for the first switch module and the second switch module according to the voltage compensation value during a second dead time period.