Open-circuit fault detection method of three-phase inverter power tube
A three-phase inverter, open-circuit fault technology, applied in the fault location, instrument, measuring electricity and other directions, can solve the problems of high diagnosis cost, affect the diagnosis result, misdiagnosis, etc., achieve accurate fault diagnosis function, reduce fault diagnosis cost , The effect of improving work reliability
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[0025] See figure 1 , The detection device for realizing the open circuit fault detection method of a three-phase inverter power tube of the present invention includes a control board 3, a rectifier 4, a phase voltage acquisition board 5 and a host computer 6. The rectifier 4 rectifies the 220V alternating current into the three-phase inverter 2 in the motor drive system, and converts the 220V alternating current into 100V direct current u dc Used to drive the reverse three-phase inverter 2. The control board 3 and the host computer 6 are bidirectionally connected to realize mutual communication, and perform related algorithm processing of motor drive. The control board 3 is also bidirectionally connected with the three-phase inverter 2, the output end of the three-phase inverter 2 is connected to the permanent magnet synchronous motor 1, and the switch tube control signal sent by the control board 3 is used to drive the permanent magnet synchronous motor 1. Lead wires from t...
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