Method for inhibiting overvoltage and overcurrent of resonant transformation circuit and resonant transformation circuit
A technology of resonant conversion and resonant circuit, applied in the direction of converting DC power input to DC power output, electrical components, adjusting electrical variables, etc., can solve the current stress and voltage stress rise, increase the output impedance of the resonant conversion circuit, and damage circuit devices. and other problems to achieve the effect of reducing voltage stress and current stress, suppressing overvoltage and overcurrent stress, and improving reliability
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[0029] in figure 2 The asymmetric half-bridge resonant conversion circuit of the embodiment 1 of the present invention shown includes an inverter half-bridge composed of switch tubes Q1 and Q2, a transformer T1, a resonant capacitor Cr, a resonant inductor Lr, and a resonant in parallel with the resonant capacitor Cr The branch circuit, the series circuit of the resonant capacitor Cr, the resonant inductor Lr and the primary winding of the transformer T1 is connected to the output end of the inverter half bridge of the inverter bridge. The resonant branch includes auxiliary resonant capacitor Ca, varistor Rv and bleeder resistor R1 , The auxiliary resonance capacitor Ca and the varistor Rv are connected in series, and the bleeder resistor R1 is connected in parallel with the auxiliary resonance capacitor Ca. The circuit also includes a parallel resonant inductor Lm, which is connected in parallel with the primary side of the transformer.
[0030] During normal operation, the vol...
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