Abstract: Embodiments of the present application provide a resonant converter dynamic control system and a method thereof, the system comprising a resonant converter, a sampling circuit connected to the resonant converter, and a control circuit connecting the sampling circuit and the resonant converter; the sampling circuit is used for acquiring and transmitting an output voltage signal, an output current signal and a charge integration signal of the resonant converter to the control circuit; the control circuit is used for generating a control signal to control power transmission of the resonant converter according to the output voltage signal, the output current signal, an output current change rate and the charge integration signal, wherein the output current change rate is calculated by the output current signal. The present application can effectively improve the dynamic control performance of the resonant converter.

Abstract: Embodiments of the present application provide a resonant converter dynamic control system and a method thereof, the system comprising a resonant converter, a sampling circuit connected to the resonant converter, and a control circuit connected to the sampling circuit and the resonant converter respectively; the sampling circuit is used for acquiring and transmitting an output voltage signal, an output current signal and a charge integration signal of the resonant converter to the control circuit; the control circuit is used for generating a control signal to control power transmission of the resonant converter according to the output voltage signal, the output current signal, a benchmark reference value and the charge integration signal, wherein the benchmark reference value is calculated based on resonant frequency of the resonant converter. The present application can effectively improve the dynamic control performance of the resonant converter.

Abstract: The present disclosure discloses a composite switching circuit, including a plurality of first semiconductor devices connected in series; and at least one second semiconductor device each connected in parallel to one of the plurality of first semiconductor devices. The composite switching circuit is connected to an input source. The second semiconductor device is turned off during a preset period to transfer a current flowing through the second semiconductor device to the first semiconductor devices connected in parallel to the second semiconductor device.

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: in an entire load range, acquiring circuit parameter information of the AC-DC conversion circuit; limiting an actual switching frequency or an actual switching period of the AC-DC conversion circuit within a preset working range according to the circuit parameter information. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: in an entire load range, acquiring circuit parameter information of the AC-DC conversion circuit; limiting an actual switching frequency or an actual switching period of the AC-DC conversion circuit within a preset working range according to the circuit parameter information. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: calculating working information of an AC-DC conversion circuit according to at least one circuit parameter information of an input voltage, an input current, an output voltage, and an output current of the AC-DC conversion circuit; comparing the working information of the AC-DC conversion circuit with a preset working range to obtain an actual switching frequency or an actual switching period of the AC-DC conversion circuit. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.

Abstract: The present disclosure discloses a composite switching circuit, including a plurality of first semiconductor devices connected in series; and at least one second semiconductor device each connected in parallel to one of the plurality of first semiconductor devices. The composite switching circuit is connected to an input source. The second semiconductor device is turned off during a preset period to transfer a current flowing through the second semiconductor device to the first semiconductor devices connected in parallel to the second semiconductor device.

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method comprises: calculating working information of an AC-DC conversion circuit according to at least one circuit parameter information of an input voltage, an input current, an output voltage, and an output current of the AC-DC conversion circuit; comparing the working information of the AC-DC conversion circuit with a preset working range to obtain an actual switching frequency or an actual switching period of the AC-DC conversion circuit. The AC-DC conversion circuit can meet requirements of THD, PF, efficiency and EMI and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.