The invention discloses an electric vehicle double-battery alternating current and direct current integrated charging circuit and a control strategy thereof, the circuit comprises an alternating current charging mode based on a single-phase alternating current power grid and a direct current charging mode based on a direct current source, and the circuit comprises an open winding permanent magnet synchronous motor with an N-phase winding, double N-phase inverters, double high-voltage power batteries and a filter capacitor Cf; when the electric vehicle runs in a driving mode, direct current output by the double high-voltage power battery is inverted into three-phase alternating current through the double three-phase inverters to drive the open-winding permanent magnet synchronous motor, and when the electric vehicle runs in a direct-current charging mode, the double N-phase inverters are reconstructed into a Boost converter and a parallel bidirectional Buck/Boost converter. And in an alternating current charging mode, the double-N-phase inverter is reconstructed into a single-phase PWM rectifier with active filtering and a Buck type active filtering circuit. The integrated charging circuit is compatible with an alternating current charging mode and a direct current charging mode, unbalanced charging of the double-high-voltage power battery can be achieved only through single charging equipment, electromagnetic torque caused by multiplexing of a motor winding is effectively restrained in combination with control strategies in different charging modes, and vibration and noise generated when an automobile is charged are further reduced.
本发明公开了一种电动汽车双电池交直流集成充电电路及其控制策略,包括基于单相交流电网的交流充电模式和基于直流源的直流充电模式,所述电路包括具有N相绕组的开绕组永磁同步电机、双N相逆变器、双高压动力电池、滤波电容Cf;当电动汽车运行于驱动模式时双高压动力电池输出的直流电通过双三相逆变器逆变为三相交流电驱动开绕组永磁同步电机,直流充电模式时双N相逆变器重构为Boost变换器和并联双向Buck/Boost变换器,交流充电模式时双N相逆变器重构为带有源滤波的单相PWM整流器和Buck型有源滤波电路。该集成充电电路兼容交、直流充电模式,并且仅需单个充电设备即可实现对双高压动力电池的不平衡充电,结合不同充电模式下的控制策略,有效抑制电机绕组复用带来的电磁转矩,进一步降低了汽车充电时的振动与噪声。
Electric vehicle double-battery alternating current and direct current integrated charging circuit and control strategy thereof
一种电动汽车双电池交直流集成充电电路及其控制策略
2024-09-06
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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