The invention discloses a charging device based on a four-phase open-loop winding machine driving system, which is characterized in that a three-phase power supply is connected with a midpoint of a stator winding in a motor winding, the stator winding is connected with bridge arms which are connected in parallel in a power converter, and finally the bridge arms are connected with a battery. Power grid current can be divided into two equal parts and flows in opposite directions, total zero balance of the charging device is achieved, a total zero average rotating magnetic field generates zero net electromagnetic torque in the charging period, then the rotor is kept at the static position, and when a zero line of a three-phase power source is connected to the center of a stator winding, the zero net electromagnetic torque is generated. According to the invention, the zero line current can be controlled to be zero by using the two parallel branches of the power converter, a three-phase balance system is realized, and the stability of the power grid charging device is improved.
本发明公开了一种基于四相开环绕组机驱动系统的充电装置,包括:将三相电源与电机绕组中的定子绕组的中点进行连接,并将定子绕组与功率转换器中相互并联的桥臂进行连接,最后桥臂与电池进行连接。本发明能够将电网电流分成两个相等的部分并沿相反方向流动,实现了充电装置的总零平衡,总零平均旋转磁场在充电期间产生零净电磁扭矩,继而使转子保持静止位置,且当三相电源的零线连接至定子绕组的中心时,本发明能够利用功率变换器的两个并联支路将零线电流控制为零,实现了三相平衡系统,提高了电网充电装置的稳定性。
Charging device based on four-phase open-loop winding machine driving system
基于四相开环绕组机驱动系统的充电装置
2025-01-07
Patent
Electronic Resource
Chinese
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