A charging circuit and its control method
A charging circuit and inductance technology, which is applied to battery circuit devices, circuit devices, collectors, etc., can solve the problems of PFC positive and negative half cycle power input asymmetry, positive and negative bus load asymmetry, negative bus no energy input, etc., to achieve The effect of reducing device cost, avoiding harmonic pollution, and small step-down ratio
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] Such as image 3 As shown, a charging circuit, the circuit includes:
[0025] The anode of the first thyristor SCR1 is connected to the cathode of the second thyristor SCR2 and connected to the live wire of the mains input, the cathode of the first thyristor SCR1 is connected to the first end of the first inductor L1, and the other end of the first inductor L1 is connected to the first end of the first thyristor L1. The anode of the diode D1 is connected to one end of the first switching device Q1, and the cathode of the first diode D1 is connected to the anode of the first polarity capacitor C1 and the first branch selection end of the first selection unit S1,
[0026] The other end of the first switching device Q1, one end of the second switching device Q2, the negative pole of the first polarity capacitor C1, the positive pole of the second p...
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