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SUNGROW has obtained utility model patent authorization: "Slow start circuit and inverter system"

Article Source：Qichacha | Author：Securities Star | Issuing Time：2024.05.18
Securities Star News: According to data from Qichacha, SUNGROW (300274) has newly obtained a utility model patent authorization, titled "Slow Start Circuit and Converter System", with patent application number CN202322221177.9 and authorization date of May 14, 2024.

Patent abstract: This utility model provides a slow start circuit and an inverter system; Among them, the slow start circuit includes an AC voltage access terminal, a rectifier bridge, a slow start switch selection circuit, and multiple DC voltage output terminals; The AC voltage access terminal is connected to the AC power grid and connected to the input section of the rectifier bridge; The output terminal of the rectifier bridge is connected to multiple DC voltage output terminals through a slow start switch selection circuit; Multiple DC voltage output terminals are connected to multiple DC busbars of the inverter; When the slow start switch selection circuit receives the slow start control signal, it connects the rectifier bridge and the connection circuit with the target DC bus, so that the AC voltage connected to the AC power grid is converted into DC voltage through the rectifier bridge and output to the target DC bus, charging the DC bus capacitor connected to it. This method connects the connection circuit between the target DC bus and the rectifier bridge through a slow start switch selection circuit, achieving pre charging without the need for multiple slow start circuits, simplifying the circuit and reducing costs.


Attached drawings of patent abstract

Since the beginning of this year, SUNGROW has obtained 315 new patent authorizations, an increase of 89.76% compared to the same period last year. Based on the financial data of the company's 2023 annual report, the company invested 2.447 billion yuan in research and development, a year-on-year increase of 44.63%.
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