High-voltage direct-current power distribution unit and control method thereof
A high-voltage DC and power distribution device technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problems of contactor arc extinguishing, burning power distribution switches, etc., to achieve the effect of improving working life and improving reliability
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[0025] The technical scheme of the invention will be described in detail below in conjunction with the drawings:
[0026] The circuit of the present invention is Figure 4 As shown, the high-voltage DC power distribution device includes a DC power supply V DC And load, it also includes electromechanical hybrid switch unit A, pre-charging unit B and discharge freewheeling circuit unit C. The electromechanical hybrid switch unit A and the pre-charging unit B are connected in parallel between the positive output terminal of the DC power supply and the positive input terminal of the load. The discharge freewheeling circuit unit C is connected in parallel with the load, and the negative input terminal of the load is connected to the DC power supply Ground the negative output terminal of the power supply.
[0027] Among them, the electromechanical hybrid switch unit A consists of a contactor T and an insulated gate bipolar transistor K 1 Composition; the input end of the contactor T is ...
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