Permanent Magnet Synchronous-Motor`s structure and design
Abstract:Magnetic field is the indispensable media for electromechanical energy conversion, synchronous motor which using permanent magnet to produce magnetic is short for Permanent Magnet synchronous motor or PM motor. Because of the magnetic field is produced by permanent magnet, it doesn't need sliping and magnetic excitation device. As a new kind of motor, in comparison with electricity excitation motor, it with the advantage of simple structure, no excitation coil、no sliping、no commutator,、no brush、high power factor、high efficiency、low inertia of rotor、reliable running ,etc.
This paper introduced Permanent Magnet Synchronous Motor(PMSM)’s basic characteristics、working principle、structure and application briefly,and take rare earth Permanent Magnet Synchronous Motor as the research object. Specifically,this article is carried on around electromagnetic design and scheme analysis of a Line-Start Permanent Magnet Synchronous Motor(LSPMSM) . The whole design process mainly include: motor’s steady-state analysis and calculation;magnetic circuit analysis and calculation;electromagnetic structure design for three-phase LSPMSM which including stator rotor structure design;air-gap magnetic field distribution;analysis and design of permanent magnet size; structure design and analysis of magnet pole,etc.
Since ACPMSM have a series of advantages like the as small volume、 light weight,、high efficiency and energy saving and so on. With the new permanent magnetism materials’ discovery and application, especially the advent of high-performance rare earth permanent magnet, In additon, the rapid development and continuous improvement of power electronic and computer technology have made it’s control technology mature gradually and even controller has productization.We can foresee that on occasion of stepless drive,the PMSM’s application prospect will be very optimistic.
Keyworlds: rare earth permanent magnet material Permanent Magnet SynchronousMator(PMSM) Line-Start electromagnetic design