The invention relates to the field of circuits, in particular to a power conversion circuit and a charging gun circuit. The invention discloses a power conversion circuit and a charging gun circuit, the power conversion circuit comprises a totem-pole PFC circuit, a synchronous rectifier tube of the totem-pole PFC circuit is realized by a transistor with a body diode, and the control strategy of the synchronous rectifier tube is as follows: when the power conversion circuit works in a light load state, the totem-pole PFC circuit works in the light load state; the synchronous rectifier tube is not controlled and is in a cut-off state; when the power conversion circuit works in a heavy load state, the synchronous rectifier tube is controlled to be correspondingly conducted along with the positive and negative of the input alternating current power supply. According to the invention, the heating loss of the synchronous rectifier tube can be effectively reduced, the overall working efficiency of the circuit is improved, and the safety and reliability of the circuit are improved.

    本发明涉及电路领域,特别地涉及一种电源转换电路及充电枪电路。本发明公开了一种电源转换电路及充电枪电路,其中,电源转换电路及包括图腾柱式PFC电路,图腾柱式PFC电路的同步整流管由具有体二极管的晶体管来实现,同步整流管的控制策略为:当该电源转换电路工作在轻载状态下时,同步整流管不做控制而处于截止状态;当该电源转换电路工作在重载状态下时,同步整流管被控制跟随输入的交流电源的正负进行相应导通。本发明可以有效减小同步整流管的发热损耗,提升电路整体的工作效率,并提高了电路的安全性和可靠性。


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    Title :

    Power switching circuit and charging gun circuit


    Additional title:

    一种电源转换电路及充电枪电路


    Contributors:
    LI WENHUI (author) / QIN SONG (author) / SONG PING (author)

    Publication date :

    2023-05-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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