Miniature inverter with power grid voltage sampling circuit

• Main Authors: YI MEIYU, WANG CAN, ZHU CHUANMEI
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The utility model relates to a miniature inverter with a power grid voltage sampling circuit, and belongs to the technical field of circuit structures. The micro inverter with the power grid voltage sampling circuit comprises a DC/AC module, an MCU module and an output module, wherein the output module comprises the power grid voltage sampling circuit. The power grid voltage sampling circuit comprises a first sub-circuit L1F, a second sub-circuit L2F and a third sub-circuit L12, the first sub-circuit L1F is connected with a power grid live wire L and is provided with a first signal VG1 output end, and the second sub-circuit L2F is connected with a power grid zero wire N and is provided with a second signal VG2 output end, so that timely, accurate and safe voltage sampling is realized; and the MCU module controls the DC/AC module according to the first signal VG1 and the second signal VG2, so that power generation is stopped when the voltage of the power grid is too high, and the inverter is protected from bei