The invention relates to the technical field of circuit design, in particular to a constant-current and constant-voltage device applied to a wireless charging system of an electric vehicle, which comprises a constant-current/constant-voltage wireless charging topology circuit, the phase difference between an alternating-current input voltage UAB and an alternating-current output voltage Uab is 90 degrees in a constant-current mode, an inverter can realize an approximate zero phase angle, and the constant-current/constant-voltage wireless charging topology circuit is applied to the wireless charging system of the electric vehicle. The load is changed from 6 ohms to 9 ohms, the output voltage of the battery end is increased from 140 V to 210 V, and the output current is kept at 23 A. In the constant-voltage charging mode, alternating-current input voltage UAB and alternating-current output voltage Uab are in the same phase, the inverter can also achieve ZPA, when the load is changed from 17 ohm to 20 ohm, the current of the battery end is reduced from 15 A to 13 A, in the constant-current/constant-voltage charging mode, the maximum charging efficiency of the system is 94% in the constant-voltage charging state, the maximum charging efficiency of constant-current charging is 92.3%, and the maximum charging efficiency of constant-current charging is 92.3%. And the output power range is from 1.5 KW to 6 KW.

    本发明涉及电路设计技术领域,具体为一种应用于电动汽车无线充电系统恒流恒压装置,包括恒流/恒压无线充电拓扑电路,恒流模式下交流输入电压UAB和交流输出电压Uab相位差为90°,并且逆变器可以实现近似零相位角,负载从6Ω变化到9Ω电池端输出电压从140V增加到210V,输出电流保持在23A。恒压充电模态下交流输入电压UAB和交流输出电压Uab同相位并且逆变器同样可以实现ZPA,负载从17Ω变化到20Ω时电池端电流从15A减小到13A,恒流/恒压充电模式下系统最大充电效率出现在恒压充电状态为94%,恒流充电最大充电效率为92.3%,输出功率范围为1.5‑KW到6‑KW。


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    Title :

    Constant-current and constant-voltage device applied to wireless charging system of electric vehicle


    Additional title:

    一种应用于电动汽车无线充电系统恒流恒压装置


    Contributors:
    ZHANG HAILONG (author) / LIN XUMEI (author) / LI ZHEN (author) / CHEN YAFEI (author)

    Publication date :

    2022-12-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




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