The inverter increases the voltage gain and maintains the operating state of the three-phase motor in the event of a power lock-up open circuit fault.

Abstract

The invention relates to an inverter device that maintains the operating state of a three-phase grid when there is an open circuit fault in the power switch (1), including: input power supply (DC power supply 13), two capacitors that divide the input voltage (14) and (15), power switches (1, 4, 5, 8, 9 and 12) switching on / off in DC and power switches (2, 3, 6, 7, 10 and 11) switching on / off in DC to create a three-step three-phase voltage at the output to control the three-phase grid, a central microprocessor (CPU (17)) including processing software to generate PWM (Pulse Width Modulation) control signals for the power switches in the inverter module to adjust the switching time of the DC current to AC current.

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