Bus active discharging method, charging system and three-port vehicle-mounted charger
Bus active discharging method, charging system and three-port vehicle-mounted charger
- Neue Suche nach: GAO LONG
- Neue Suche nach: WANG LEI
- Neue Suche nach: ZHANG ZHEN
- Neue Suche nach: GAO LONG
- Neue Suche nach: WANG LEI
- Neue Suche nach: ZHANG ZHEN
The invention discloses a bus active discharging method, a charging system and a three-port vehicle-mounted charger, and belongs to the technical field of power electronics. The charging system comprises a transformer, a primary side conversion circuit, a secondary side conversion circuit and a bus capacitor, the secondary side conversion circuit comprises a synchronous rectification circuit and a step-down circuit, and the output end of the step-down circuit is electrically connected with the energy storage unit. The bus active discharge method comprises the following steps: determining a voltage threshold required to be reached when the discharge of a bus capacitor is finished and the actual voltage of the bus capacitor; when the voltage threshold value is smaller than the reference voltage and the actual voltage is smaller than or equal to the reference voltage, the switching tube of the rectification circuit and the primary side conversion circuit are controlled to be switched on and off, the conduction loss and the switching loss of the primary side conversion circuit and the conduction loss of the synchronous rectification circuit are utilized, the discharging time is short, no extra hardware circuit needs to be added, and the cost is reduced. The system cost is reduced, and the system power is improved.
本申请公开了一种母线主动放电方法、充电系统及三端口车载充电机，属于电力电子技术领域。充电系统包括变压器、原边转换电路、副边转换电路以及母线电容，副边转换电路包括同步整流电路和降压电路，降压电路的输出端与储能单元电连接。母线主动放电方法包括：确定母线电容放电结束时需要达到的电压阈值和母线电容的实际电压；在电压阈值小于参考电压，且实际电压小于或等于参考电压时，通过控制整流电路的开关管和原边转换电路导通关断，利用原边转换电路导通损耗、开关损耗以及同步整流电路的导通损耗，放电时间短，不用增加额外的硬件电路，便于降低系统成本，提高系统的功率。
Dokumentinformationen
Bus active discharging method, charging system and three-port vehicle-mounted charger
母线主动放电方法、充电系统及三端口车载充电机
2024-01-12
Patent
Elektronische Ressource
Chinesisch
| 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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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