Abstract

A comparison of various synchronous reluctance machines is performed in terms of the electromechanical conversion efficiency. The efficiency criteria are as the specific electromagnetic torque, active and total power consumed, and power factor. A generalized mathematical model is proposed, which is based on the principle of electromechanical transformation, being a change in the magnetic energy of all windings, as a function of the rotor rotation angle. The assumptions of the model are that the electric machine is not saturated, the magnetic conductivity of steel is infinity, and there are no scattering fluxes. This model made it possible to obtain performance indicators of electric machines with an established error under any control actions and for various configurations of magnetic systems of the active part up to the nominal values of speeds and torques. Calculation of the efficiency indicators of a synchronous reluctance (reactive) machine with a toothed rotor is carried out under the assumption that the current of the stator winding is distributed along the air gap according to the harmonic law, the stator serration is not taken into account, and the average rotor conductivity is taken to be unity. It is shown that it is appropriate to operate a gearless electric drive on the basis of a synchronous reluctance machine with a double serration, which is due to the high specific torque, but the range of regulation of such an electric drive in terms of speed in the second zone is limited due to the small power factor.

中文翻译：

---

同步磁阻电机机电转换效率的评估

摘要

在机电转换效率方面对各种同步磁阻电机进行了比较。效率标准是特定的电磁转矩、消耗的有功功率和总功率以及功率因数。提出了一种广义数学模型，该模型基于机电变换原理，即所有绕组的磁能随转子旋转角度的变化。模型假设电机未饱和，钢的导磁率无穷大，不存在散射通量。该模型可以在任何控制动作下获得具有既定误差的电机的性能指标，并且对于活动部件的磁系统的各种配置，直到速度和扭矩的标称值。带齿转子同步磁阻（无功）电机效率指标的计算，假设定子绕组电流按谐波规律沿气隙分布，不考虑定子锯齿，并且平均转子电导率被认为是统一的。结果表明，在双锯齿同步磁阻电机的基础上运行无齿轮电驱动是合适的，这是由于高比转矩，