POWER CONVERSION DEVICE

• Main Authors: ZHAN, Jinxiang, GAO, Kai, GAO, Yongbing, WANG, Juncan
• Format: Patent
• Language: English; French; German
• Published: 04.09.2024
• 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; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

This application provides a power conversion device. The power conversion device includes a positive direct current bus, a negative direct current bus, a first capacitor, a second capacitor, a first inductor, a first discharge unit, and an inverter circuit. An input terminal of the inverter circuit is connected to an input terminal of the power conversion device separately by using the positive direct current bus and the negative direct current bus, and an output terminal of the inverter circuit is connected to an output terminal of the power conversion device. The first capacitor is connected between the positive direct current bus and the negative direct current bus. The second capacitor is connected in series to the first inductor and then connected in parallel to the first capacitor, where a capacitance value of the second capacitor is greater than a capacitance value of the first capacitor. The first discharge unit is connected in parallel to the first inductor, and is configured to be in a conducted state when a voltage of the first inductor is greater than a first action voltage threshold. According to this application, a case in which a semiconductor device in the power conversion device has a risk of voltage overstress caused by a differential mode lightning strike current can be avoided.