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    • 2. 发明公开
    • Power Supply Circuit Without Charging Loop, and Power Management System
    • US20230283098A1
    • 2023-09-07
    • US18016387
    • 2021-07-12
    • Gree Electric Appliances, Inc. of Zhuhai
    • Jing WangMeng HuangShangxian FengMingzhao FangChenghao CuiMingqiang Sheng
    • H02J7/06H02J7/35H02J7/34
    • H02J7/06H02J7/35H02J7/345
    • The present disclosure provides a power supply circuit without a charging loop, and a power management system. The power supply circuit comprises an alternating current switch component, a photovoltaic switching component and a direct-current bus capacitor. The alternating current switch component is configured to electrically connect a live wire of a three-phase alternating current to a direct-current bus, and cause, when an alternating current is selected to charge the direct-current bus capacitor, a voltage across two ends of a direct-current bus capacitor to steadily rise to a target voltage. The photovoltaic switching component is configured to electrically connect a photovoltaic power supply to the direct-current bus, and cause, when the photovoltaic power supply is selected to charge the direct-current bus capacitor, the voltage across the two ends of the direct-current bus capacitor to steadily rise to the target voltage. The direct-current bus capacitor is electrically connected between a positive electrode and a negative electrode of the direct-current bus. When the alternating current or the photovoltaic power supply is electrically connected to the direct-current bus, the alternating current switch component or the photovoltaic switching component can control the voltage across the two ends of the direct-current bus capacitor to stably rise to the target voltage, thereby preventing causing damage to components on the direct-current bus by a large impact current generated by a rapid rise of the voltage across the two ends of the direct-current capacitor.