| 摘要 |
A power supply converter comprises: a power input circuit, for generating and outputting a first alternating current voltage; a transformer, for transforming the first alternating current voltage into a second alternating current voltage; a power output circuit, for transforming the second alternating current voltage into an output voltage and outputting the output voltage; a resonant circuit, for resonation when the frequency of the first alternating current voltage is equal to the resonant frequency of the resonant circuit, in order to realize a zero current switch for the power input circuit and a zero voltage switch for the transformer; and a correcting circuit, for sensing the first alternating current voltage to obtain a detection signal, detecting the value of a ringing signal in the detection signal, and sending a control signal to the power input circuit on the basis of the value of the ringing signal, so that the frequency of the first alternating current voltage is adjusted to become equal to the resonant frequency of the resonant circuit or to be around the resonant frequency, and also to adjust the value of the ringing signal to a minimal value. The power supply converter can improve the conversion efficiency of power supply converters. |
