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Time delay must be inserted in the switching signals to prevent the simultaneous conduction of two switching devices in the same leg of the inverter, however, this results in a decrease of the fundamental component and an increase of the odd-order except the triple-n harmonics of the output voltage of the inverter. The distortion of output voltage further distorts the output current in turn. This...
This paper focuses on method of three-level inverter. A system of three-level Space-Vector PWM (SVPWM) based on one chip DSP and CPLD is proposed. Neutral-point balance is achieved by adjusting the output voltage vectors based on the neutral-point current judging. This method simplify the digital control of three-level inverters and improved the reliability of system. The paper mainly focuses on the...
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