The invention belongs to the technical field of converter control, and discloses a control method of a high-efficiency bidirectional direct-current converter for a hybrid electric vehicle, which adopts a high-voltage side voltage and low-voltage side current double-closed-loop control branch to realize high-voltage side voltage regulation and energy bidirectional flow control by changing the duty ratio; meanwhile, a current margin single closed-loop control branch is adopted, and the current peak-to-peak values of the first inductor L1 and the second inductor L2 are changed by adjusting the switching frequency, so that the current margin delta I is kept basically unchanged under the whole operation condition, reliable implementation of zero-voltage soft switching of the switching tube is ensured, on-state loss is reduced, and the switching efficiency is improved. Therefore, the system can efficiently operate in the whole low-voltage side voltage and load change range, and has the advantages of being easy to implement, low in cost, high in efficiency and the like.
本发明属于变换器控制技术领域,公开了一种用于混合动力汽车的高效率双向直流变换器的控制方法,采用高压侧电压、低压侧电流双闭环控制支路,通过改变占空比,实现高压侧电压调节和能量的双向流动控制;同时,采用电流裕度单闭环控制支路,通过调整开关频率,来改变第一电感L1和第二电感L2的电流峰峰值,以使电流裕度ΔI在整个运行条件下保持基本不变,既确保了开关管零电压软开关的可靠实现,又减小了通态损耗,从而使系统在整个低压侧电压和负载变化范围内均能高效运行,具有易于实现、成本较低、效率较高等优点。
Control method of high-efficiency bidirectional direct-current converter for hybrid electric vehicle
用于混合动力汽车的高效率双向直流变换器的控制方法
2022-06-03
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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