Preset voltage type high voltage frequency transformer power unit by-pass circuit for electric relay
A technology of preset voltage and bypass circuit, applied in electrical components, output power conversion devices, etc., can solve the problems of increased bypass circuit volume, low qualification rate, and reduced model selection, so as to ensure safety and reliability. sexual effect
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0020] Such as image 3 As shown, the power unit includes a bypass circuit for the H inverter bridge 1 composed of a diode rectifier bridge 2 , a thyristor 3 and a preset voltage circuit 4 . Wherein the diode rectifier bridge 2 and the silicon controlled rectifier 3 are prior art, and will not be described in detail here. The preset voltage circuit 4 includes: current limiting resistors R2, R3, relays KC1, KC2, fuses FU1, FU2, charging resistor R1, and charging capacitor C1.
[0021] Wherein, the current-limiting resistor R2, the relay KC1, and the fuse FU1 are sequentially connected in series between the DC positive bus of the H inverter bridge 1 and the thyristor 3 . The current limiting resistor R3, the relay KC2, and the fuse FU2 are sequentially connected in series between the DC negative bus of the H inverter bridge 1 and the thyristor 3. The r...
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