Current-sharing bypass circuit of power unit of high-voltage inverter
A high-voltage frequency converter and power unit technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of limited conduction capacity of a single thyristor, high cost, and the conduction capacity of a single thyristor is lower than the actual demand.
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0022] figure 2 It is the circuit principle diagram of the bypass circuit of the power unit of the current equalizing high-voltage frequency converter disclosed by the present invention. As shown in the figure, the bypass circuit of the power unit of the current equalizing high-voltage frequency converter disclosed by the present invention includes a single-phase full-wave diode rectifier bridge 20 arranged beside the H inverter bridge 10, a first thyristor, and a first pre-charging resistor and a first buffer circuit connected in parallel with the first thyristor T1, further comprising: a second thyristor T2, a second pre-charging resistor, and a second buffer circuit connected in parallel with the second thyristor T2;
[0023] The single-phase full-wave diode rectifier bridge 20 includes four diodes D1-D4, and the cathodes of the two diode...
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