| CPC H05B 45/3575 (2020.01) [H02M 1/0085 (2021.05); H05B 45/345 (2020.01)] | 9 Claims |
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1. A bleeder current control method for processing an input signal input into a power system, the method comprising:
providing a post-bridge input signal to the power system;
shaping the post-bridge input signal into a bleeder current reference signal, wherein the bleeder current reference signal is inversely correlated with the post-bridge input signal;
obtaining a current sampling signal representing a bleeder current, and comparing the current sampling signal with the bleeder current reference signal to obtain an error signal;
controlling the current sampling signal according to the error signal, so that the current sampling signal follows waveform of the bleeder current reference signal, and wherein
the current sampling signal is at a first current value when the post-bridge input signal is higher than a first voltage, and the first current value is maintained at a stable current value;
the current sampling signal is at a second current value when the post-bridge input signal is lower than a second voltage, wherein the first voltage is higher than the second voltage, and wherein the first current value is smaller than the second current value.
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