Power supply device for electric vehicle

• Main Authors: KONO YUSUKE, MINAMI TAKAHIKO
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2021
• 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

The invention provides a power supply device for an electric vehicle, which can estimate the loss of each structure of a high-frequency insulation circuit through a simple structure. A power supply device for an electric vehicle according to an embodiment is provided with a high-frequency transformer, a rectifier, a step-up chopper, an inverter, and a control circuit. The rectifier converts an alternating current supplied from the high-frequency transformer into a direct current. The boost chopper boosts the DC voltage supplied from the DC power supply. The inverter has a resonant capacitor and supplies an alternating current to the high-frequency transformer using the direct current voltage supplied from the step-up chopper. The control circuit calculates a total loss based on an input voltage to the inverter and an output voltage and an output current of the rectifier, calculates the effective value of the alternating current output from the inverter and the loss of each of the inverter, the high-frequency