Performance Investigation of a five-phase Multi-segment primary PMLSM for Ropeless Elevator

With the increasing advance of construction engineering, there are higher and higher buildings across the city at present, so the high performance elevator becomes very important. Normally they are mostly driven by a rotate motor with cable. However, if the buildings exceeding to 300m, the cable consumes a lot of power and causes some fluctuations in the process of moving. In order to overcome this problem, the elevator driven by multi-segment primary permanent magnet linear synchronous motor (MP-PMLSM) is adopted, which also has many other many obvious advantages, such as high efficiency, simple structure, save space occupancy, etc. Its key technologies are high thrust density PMLSMs and control system. Several PMLSMs have been proposed [1]-[3], mostly focusing on the motor structure and the switching control of primary section. The segment winding power feeding method is studied [4], [5]. which adopting sectional winding permanent magnet linear synchronous motor. The primary is divided into sections, but the iron corn is continuous, so they are not segment primary PMLSM in some ways. This paper proposed a 2t vertical hoist system driven by novel five-phase PMLSM with segment winding power supply. Compared to three-phase PMLSM, the five-phase PMLSM can reduce the thrust force ripple and noise during operation. Moreover, it has higher fault tolerance and thrust force when supplied with same voltage or current resource. Therefore, the five-phase PMLSM is the better candidate. In order to facilitate the installation, the primary and iron core are divided into sections.