Design and Implementation of a Self-Starting Permanent Magnet Hysteresis Synchronous Motor for Pump Applications

Abstract

A Permanent Magnet Hysteresis Synchronous Motor (PMHSM) is designed and implemented in this paper. The designed motor is analyzed by using simulation and experimental studies. The torque, torque ripple, speed and flux density are also analyzed by using Finite Element Analysis (FEA) method. A standard commercial stator geometry is preferred for easy installation. A new rotor structure is designed for the motor. A submersible pump turbine is connected to the prototype motor in order to test under a real pump load condition by a pump test stand. The same pump used in the experiment was also tested with a commercial induction motor (IM) submersible pump motor with same power. Thus, the commercial and proposed motor are compared in terms of static head value, which is an important value in pump applications. The performance of the motor is better than the IM because it can operate at synchronous speed without slip. In addition, the proposed motor does not require any auxiliary system to achieve starting with grid. The proposed PMHSM can be used to obtain high performance and efficiency for pump applications.

A Review on Analysis Methods and Research Status of Hysteresis Motor

“…Insert PMs in the rotor of hysteresis motor, or replace the rotor core of PM motor with hysteresis material, and then the permanent magnet hysteresis motor (PMHM) is obtained. PMHM has the advantages of high power density and high efficiency similar to the PM motor, and has a self-starting ability using the characteristics of hysteresis torque, usually suitable for industrial occasions, such as fans and pumps [10,11]. The typical structure of PMHM is shown in Figure 5.…”

“…The benchmark of PMHM is usually an induction motor, both of which can be started at constant frequency and can work without a position sensor. Compared with the induction motor, PMHM has a higher torque density and lower noise, can run synchronously and more stably [10,12]. In addition, the reluctance effect can also be used to improve the output torque of the hysteresis motor, that is, adding a magnetic barrier on the hysteresis ring, so that the magnetic resistance of the d-axis and the q-axis is different, thus producing a reluctance torque; its typical structure is shown in Figure 6 [13,14].…”

“…As shown in Figure 17, a structure is designed for pump applications [10], whose PMs are between the inner and outer layers of the hysteresis material. Simulated and experimental results show that the volume is reduced by half, and the operating noise is lower, while its performance is on par with the induction motor.…”

“…Simulated and experimental results show that the volume is reduced by half, and the operating noise is lower, while its performance is on par with the induction motor. For pump applications in [10], the stator/rotor lengths of the induction motor are about 170 mm, while the lamination length of the PMHM is only 70 mm. The cost of the PMHM is USD 160, less than that of the induction motor, USD 175.…”

Advances in Power Quality Analysis Techniques for Electrical Machines and Drives: A Review

“…Moreover, the rapid development of new induction machines and the emerging of power drive technologies in the past few decades, ranging from a few watts to many megawatts [17], enables them to be used in many fields involving conversion processes [18], whether in the generation, transmission, or electrical energy consumption [19]. Therefore, the electrical motors and drives are used in industrial, commercial, and domestic applications such as transportation systems [20,21], rolling mills [22], paper machines [23], textile mills [24], machine tools [25], pumps [26], robots [27], fans [28], and vehicle propulsion [29], among others [30].…”