Patent ID: 9680397
Date: 2017-06-13
CPC Classifications: H02M

Claim:
1. A control method of three-phase inverter, configured for controlling a three-phase inverter having switch sets, a first inductor, a second inductor and a third inductor, wherein the control method comprises: obtaining a DC bus voltage, a first phase voltage, a second phase voltage and a third phase voltage, and a first phase current, a second phase current and a third phase current respectively flowing through the first inductor, the second inductor and the third inductor; obtaining inductances of the first inductor, the second inductor and the third inductor, wherein the inductances respectively vary with the first phase current, the second phase current and the third phase current; calculating switch duty ratios by a division-summation control means according to the DC bus voltage, the phase voltages, current variations of the phase currents, the inductances, and a switching cycle based on a sinusoidal pulse width modulation; and generating corresponding control signals based on the switch duty ratios so as to control a switching of the switch sets, wherein the step of obtaining the inductances of the first inductor, the second inductor, and the third inductor comprises: