Abstract

A magnetic reducer with a three-phase stator winding supplied by a static frequency converter with sinusoidal current, which is in phase or opposite phase with the EMF of the no-load winding, will have in this mode the maximum values of the electromagnetic moments of the shafts, proportional to the stator current. Rotors of such a reducer will not “stall” as long as the frequency converter is able to increase its current with the load increase. The electromagnetic moments of the rotors of the magnetic reducer exist due to the presence of the electromagnetic moment of the stator. The electromagnetic moments of the rotors are rigidly bound with the electromagnetic moment of the stator through constant coefficients. In a magnetic reducer with a frequency converter, all three electromagnetic moments are directly proportional to the active current of the stator winding. In the absence of active current in the stator, the electromagnetic moments of the stator and rotors are zero. In such a reducer, the electric channel can work in the motor and generator modes and convey the properties of a synchronous compensator to the reducer. A mathematical model of a magnetic reducer with a three-phase stator winding focused on the functional mode of a wind farm is proposed: the slow-speed shaft takes the external torque from the wind wheel, and the high-speed shaft transfers the torque to the generator. The model contains four equations of state.

中文翻译：

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具有三相定子绕组的可调电磁减速器

摘要

由静态变频器提供的三相定子绕组的磁减速器具有与空载绕组的EMF同相或反相的正弦电流，在这种模式下，该磁减速器的最大电磁力矩为与定子电流成比例的轴。只要变频器能够随着负载的增加而增加其电流，这种减速器的转子就不会“失速”。由于定子的电磁力矩的存在，所以存在磁减速器的转子的电磁力矩。转子的电磁力矩通过恒定系数与定子的电磁力矩刚性结合。在带有变频器的电磁减速器中，这三个电磁力矩都与定子绕组的有功电流成正比。在定子中没有有效电流的情况下，定子和转子的电磁矩为零。在这种减速器中，电通道可在电动机和发电机模式下工作，并将同步补偿器的特性传递给减速器。提出了一种以三相定子绕组为中心的风力发电机的数学模型，该模型着重于风电场的功能模式：低速轴从风轮获取外部转矩，而高速轴将转矩传递至风轮。发电机。该模型包含四个状态方程。电气通道可以在电动机和发电机模式下工作，并将同步补偿器的特性传达给减速器。提出了一种以三相定子绕组为中心的风力发电机的数学模型，该模型着重于风电场的功能模式：低速轴从风轮获取外部转矩，而高速轴将转矩传递至风轮。发电机。该模型包含四个状态方程。电气通道可以在电动机和发电机模式下工作，并将同步补偿器的特性传达给减速器。提出了一种以三相定子绕组为中心的风力发电机的数学模型，该模型着重于风电场的功能模式：低速轴从风轮获取外部转矩，而高速轴将转矩传递至风轮。发电机。该模型包含四个状态方程。