The disclosure relates to a vehicle on-board charger with a snubber circuit. An on-board charger is provided with a bulk capacitor adapted to couple to a vehicle traction battery and a relay for receiving electrical power from an external power supply and to pre-charge the bulk capacitor. A power factor correction (PFC) circuit is connected between the bulk capacitor and the relay. The PFC circuit includes a switch that is adjustable between an on-position and an off-position. The switch enables current flow from the relay to the bulk capacitor in the off-position. The snubber circuit is coupled to the switch to damp a transient voltage present at the switch during a transition from the on-position to the off-position. A processor is programmed to control the switch.
本公开涉及具有缓冲电路的交通工具机载充电器。机载充电器设置有适合于耦合到交通工具牵引电池的大容量电容器和用于从外部电源接收电功率并对大容量电容器预充电的继电器。功率因数校正(PFC)电路连接在大容量电容器和继电器之间。PFC电路包括在接通位置和断开位置之间可调节的开关。开关在断开位置上允许从继电器到大容量电容器的电流流动。缓冲电路耦合到开关以在从接通位置到断开位置的转变期间降低存在于开关处的瞬态电压。处理器被编程来控制开关。
Vehicle on-board charger with snubber circuit
具有缓冲电路的交通工具机载充电器
2022-01-28
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
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