The invention relates to an electric vehicle three-port bidirectional direct-current converter with a partial power conversion function. The electric vehicle three-port bidirectional direct-current converter mainly comprises a power factor correction full-bridge circuit, a main power full-bridge circuit, a partial power full-bridge circuit, a partial power post-stage voltage regulation circuit, a low-voltage full-bridge circuit and a high-frequency transformer, the high-frequency transformer is used for connecting the power factor correction full-bridge circuit, the main power full-bridge circuit, the partial power full-bridge circuit and the low-voltage full-bridge circuit, and the partial power full-bridge circuit is cascaded with the partial power post-stage voltage regulation circuit; a port formed by connecting an output port of the partial power post-stage voltage regulation circuit and an output port of the main power full-bridge circuit in series is used as a high-voltage port and is connected with a power battery; an output port of the low-voltage full-bridge circuit serves as a low-voltage port and is connected with the storage battery; and the partial power full-bridge circuit and the partial power post-stage voltage regulation circuit form a partial power conversion circuit which is used for transmitting partial power in the total power range, so that the port voltage of the converter is matched with the turn ratio of the high-frequency transformer, and the soft switching operation of the converter in the full working voltage range is realized.
本发明为一种具有部分功率变换功能的电动汽车三端口双向直流变换器,主要包括功率因数校正全桥电路、主要功率全桥电路、部分功率全桥电路、部分功率后级电压调节电路、低压全桥电路和高频变压器;高频变压器用于连接功率因数校正全桥电路、主要功率全桥电路、部分功率全桥电路和低压全桥电路,部分功率全桥电路与部分功率后级电压调节电路级联,部分功率后级电压调节电路的输出端口与主要功率全桥电路的输出端口串联形成的端口作为高压端口,与动力电池连接;低压全桥电路的输出端口作为低压端口,与蓄电池连接;部分功率全桥电路和部分功率后级电压调节电路构成部分功率变换电路,用于传输总功率范围中的部分功率,使得变换器的端口电压与高频变压器匝数比匹配,实现变换器在全工作电压范围内的软开关运行。
Electric vehicle three-port bidirectional direct current converter with partial power conversion function
具有部分功率变换功能的电动汽车三端口双向直流变换器
2023-03-14
Patent
Electronic Resource
Chinese
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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