The invention discloses a bus voltage control method and system of a PFC side conversion circuit, a vehicle and a medium, the bus voltage control method is applied to a three-port vehicle-mounted charger, and the method comprises the following steps: judging the working mode of the three-port vehicle-mounted charger; if the working mode is an OBC + DCDC mode, a switching tube in the PFC side conversion circuit is controlled to work at a preset first duty ratio D1; if the working mode is a DCAC + DCDC mode, a switching tube in the PFC side conversion circuit is controlled to work at a preset second duty ratio D2; and if the working mode is a DCDC mode, determining a safe duty ratio according to the input voltage U of the high-voltage side conversion circuit and the output power P of the low-voltage side conversion circuit, and controlling a switching tube in the PFC side conversion circuit to work at the safe duty ratio. According to the invention, the device damage caused by ultrahigh bus voltage of the PFC side conversion circuit can be avoided, and the cost is reduced at the same time.
本发明公开了一种PFC侧转换电路的母线电压控制方法、系统、车辆及介质,所述母线电压控制方法应用于三端口车载充电机,包括:判断三端口车载充电机的工作模式;若工作模式为OBC+DCDC模式,则控制PFC侧转换电路中的开关管以预设的第一占空比D1工作;若工作模式为DCAC+DCDC模式,则控制PFC侧转换电路中的开关管以预设的第二占空比D2工作;若工作模式为DCDC模式,则根据高压侧转换电路的输入电压U、低压侧转换电路的输出功率P确定安全占空比,并控制PFC侧转换电路中的开关管以该安全占空比工作。采用本发明能避免PFC侧转换电路的母线电压超高而损坏器件,同时降低成本。
Bus voltage control method and system of PFC side conversion circuit, vehicle and medium
PFC侧转换电路的母线电压控制方法、系统、车辆及介质
2023-08-22
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 / 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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