The invention provides a quasi-differential lock sum-difference rate control system and method, and the method comprises the steps: enabling all windings of n three-phase AC motors to be in end-to-endconnection according to the phase sequence and the motor sequence, and obtaining three sides belonging to three phases, and then carrying out the end-to-end connection to form a large triangle; taking the end-to-end connection points of the adjacent windings on each side of the large triangle as n equal division points of the side, and connecting the three n equal division points on the three sides with three control ends of the control switch K; connecting three vertexes of the large triangle with a three-phase alternating-current power supply; when the control switch K is switched off, connecting the motors running in the large triangle in series to realize a differential function of reverse load inductive voltage distribution; when the control switch K is switched on, dividing the motors in the large triangle into two groups of power supplies connected in parallel, adopting a new Y-shaped connection method for independent power supply between the two groups of motors, realizing aninter-group quasi-differential lock function, and calling the phase sequence connection relationship as a vertical line theorem of a three-phase alternating-current motor system; and modulating the difference rate gamma by controlling the conduction rate Cy of the switch K.
本发明提供一种准差速锁和差速率控制系统及控制方法,将n个三相交流电机所有绕组依相序和电机次序首尾连接,得到分属三个相位的三条边再首尾连接构成大三角形的接法;大三角形每条边相邻绕组首尾接点为所在边的一个n等分点,三条边上的三个n等分点连接控制开关K的三个控制端;大三角形三个顶点接通三相交流电源;当控制开关K断开时,大三角形内运行时的电机相串联实现反载感电压分配的差速功能;控制开关K接通时,大三角形内的电机被分割为电源并联的两组,两组电机之间变为独立供电新的Y型接法并实现组间准差速锁功能,这种相序连接关系称为三相交流电机系统的垂线定理;通过控制开关K的导通率Cy还可对差速率γ进行调制。
Quasi-differential lock sum-difference rate control system and control method
一种准差速锁和差速率控制系统及控制方法
2020-11-03
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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