The Study Of Dual Y Shift 30 Degree Permanent Magnet Synchronous Motor Drive System

With the advent of high performance permanent magnet, the study of PMSM drive system has been receiving increasing attention of cosmopolitan scholars. In the past 20 years, Multi-phase system has caused a wide interest of academic and engineering for its high reliability. In the application of motor drive system, multi-phase system can essentially satisfy the request of high-performance and large load changes rangeon high-power electric transmission system. Consequently multi-phase PMSM is usually used in situation of high reliability, military and high power transformation, such as circulation water motor in nuclear power station and warship propulsion system etc. However, there are still many problems which is worth to study and explore about its controlling method in theory and in practice. Accordingly it is very important to research and develope multi-phase PMSM drive system as well as prompt its application.In the first instance, this paper introduces the research background of multi-phase PMSM as well as the research history and development of multi-phase PMSM Variable Speed (VFVS) system. Based on the basic principles of coordinate conversion, the paper analyses the six-phase stationary coordinates to the two-phase static coordinates transformation (6s/2s), two-phase to two-phase rotation (2s/2r) and the six-phase stationary coordinates to the two-phase rotating coordinates transformation (6s / 2r), builds the mathematical model of dual Y shift 30 degree PMSM on the stationary coordinates. At the same time it has achieved the mathematical model of six-phase PMSM on six-phase stationary coordinates to based on synchronous reference frame system that permanent flux linkageψf is in d axis.Secondly, Details of the Vector Control(VC) of dual Y shift 30 degree PMSM is presented in the paper. Several Methods of the Vector Control in the dq coordinates has been introduced by the basic electromagnetic relations, which include the max torque/current control, flux weakening control and field oriented control(FOC) based on i d=0. The field oriented control(FOC) based on i d=0is Choosed as the driver system scheme of dual Y shift 30 degree PMSM. And the MATLAB / SIMULINK simulation is used for the field oriented control simulation.Lastly, the paper detailedly presents the hardware circuits, soft flow, and the experimental waveform of the dual Y shift 30 degree PMSM drive system; The experimental result indicates that this drive system has achieved the anticipated target for every performance.