Power supply circuit without charging loop, and power management system

• Main Authors: CUI, Chenghao, WANG, Jing, HUANG, Meng, FANG, Mingzhao, FENG, Shangxian, SHENG, Mingqiang
• Format: Patent
• Language: English
• Published: 16.02.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

Provided are 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 switch component and a direct-current bus capacitor, wherein the alternating-current switch component is used for connecting a live wire of a three-phase alternating current to a direct-current bus, and controlling, when the alternating current is selected to charge the direct-current bus capacitor, the voltage across the two ends of the direct-current bus capacitor to gradually rise to a target voltage; the photovoltaic switch component is used for connecting a photovoltaic power supply to the direct-current bus, and controlling, 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 gradually rise to the target voltage; and the direct-current bus capacitor is connected between a positive electrode and a negative electrode of the direct-current bus. When an alternating current or a photovoltaic power supply is connected to a direct-current bus, an alternating-current switch component or a photovoltaic switch component can control the voltage across two ends of a direct-current bus capacitor to stably rise to a target voltage, thereby preventing damage to components on the direct-current bus caused by a large impact current generated by a rapid rise of the voltage across the two ends of the direct-current capacitor.