Bypass module for power unit of high-voltage frequency converter
A high-voltage inverter and power unit technology, applied in the field of inverters, can solve the problems of complex design, large volume, high cost, etc., and achieve the effect of preventing the reduction of power supply voltage, improving stability and reliability, and stable working voltage
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[0049]Embodiment 1: A bypass module for a high-voltage frequency converter power unit, including a bypass drive circuit for driving a bypass contactor (bypass contactor is prior art) switch of the power unit, the bypass module Also includes:
[0050] The bypass state detection circuit is used to detect whether the bypass contactor is driven successfully;
[0051] The bypass failure feedback circuit is used to feed back the bypass failure signal detected by the bypass state detection circuit to the main control system of the high-voltage inverter;
[0052] The communication failure feedback circuit is used to timely feed back the signal of the bypass optical fiber communication failure to the main control system of the frequency converter.
[0053] In addition, the bypass module also includes a DC power supply circuit, which is used to provide low-voltage DC power for each circuit in the bypass module, for example: +48V, +24V, +5V and / or +3.3V.
[0054] Preferably, the bypass...
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