Novel Control Method for Higher Output Power of Synchronous Reluctance Motors Not Used Rare-earth Metal

近年来，永磁同步电动机以其高效率得到了广泛的应用。pmms需要稀土金属。然而，拥有稀土变得越来越困难。因此，本研究提出用不含稀土磁体的同步磁阻电机代替永磁同步电动机。同步磁阻电动机的功率小于一个永磁同步电动机。研究同步磁阻电机无位置传感器控制的实现。无位置传感器控制有望带来更高的输出功率。本文提出了一种基于高频电流的同步磁阻电机低速负载无位置传感器控制方法。实验结果表明，在低速和极低负载条件下，不需要位置传感器的同步磁阻电机控制是可行的。

Recently, the permanent magnet synchronous motors(PMSMs) which are high efficiency have been widely used. The PMSMs needs the rare-earth metal. However, it has become difficult to take possession of the rare earth.Therefore, this study proposes to apply the synchronous reluctance motors which have no the rare earth magnets instead of the PMSMs. The power of the synchronous reluctance motors is less than one of the PMSMs. The purpose of study is the realization of the position sensorless control of the synchronous reluctance motors. The position sensorless control is expected to bring higher output power.In this study, a novel position sensorless control method of the synchronous reluctance motors using the high frequency currents is proposed under very low speeds and loaded conditions. The experimental results show that it is possible to control the synchronous reluctance motors without the position sensors under very low speeds and loaded conditions.