SMA Solar Technology has been granted a patent for a circuit arrangement designed to balance a split DC link. The system includes multiple semiconductor switches, resonant components, and a countervoltage source, facilitating efficient energy management between the DC-voltage terminals. GlobalData’s report on SMA Solar Technology gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on SMA Solar Technology, Smart energy mgmt systems was a key innovation area identified from patents. SMA Solar Technology's grant share as of July 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Circuit arrangement for balancing a split dc link
The patent US12074521B2 describes a circuit arrangement designed for balancing a split DC link, which includes a series circuit of two DC-link capacitors connected between two DC-voltage terminals. This arrangement features a DC-link center point and incorporates multiple semiconductor switches, each paired with antiparallel diodes. Additionally, the circuit includes a resonant circuit comprising a resonant capacitor and inductor, which facilitates energy transfer to a countervoltage source through an additional winding. The configuration allows for efficient energy management and balancing of voltages across the capacitors, enhancing the performance of the DC link.
The claims further detail the structure and functionality of the circuit, including the arrangement of the semiconductor switches and the resonant inductor. The drive circuit is pivotal, utilizing PWM signals to control the switches while preventing simultaneous activation that could lead to short circuits. The design also includes mechanisms for enabling and synchronizing the PWM signals based on voltage differences across the capacitors, ensuring optimal operation. The coupling coefficient between the resonant inductor and the additional winding is specified, indicating a focus on maximizing energy transfer efficiency. Overall, the patent outlines a sophisticated approach to managing split DC links, which could have significant implications for power electronics applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
