The Strength Analysis And Electromagnetic Check Of High Speed IPMSM

Interior permanent magnet synchronous motor (IPMSM) is characterized byreliable operation, simple structure, high efficiency, high energy density, etc. In recentyears, IPMSM is widely applied in high-speed high-power situations, such as airconditioning drive, hybrid cars, ships and aerospace and other fields. Rotor mechanicalstructure of IPMSM is very complex. The bridge on the rotor’s stress is very high, andthe thickness of the bridge affects IPMSM’s magnetic and electrical properties. So howto take the structural strength of the rotor and magnetic properties into account is aproblem deserving of research.Firstly, this thesis introduces the basic theory and structure of permanent magnetmotor, and highlights the rotor structure of three common mechanical and magneticcharacteristics in IPMSM. On this basis, thesis introduces the elastic-plastic finiteelement mechanics and basic theory, using Ansoft maxwell establishes three kinds ofcommon interior permanent magnet rotor’s geometry model and a brief introduces theproblem of simulation setup.Secondly, this thesis simulates the three kinds of common interior permanentmagnet rotor’s structure of maximum stress and electromagnetic properties, andresearches its mechanical strength characteristics, and studies the effect of differentkinds of thickness of the bridge of on mechanical strength, and checks the motors’electromagnetic properties.Then, for the characteristics of V-shaped rotor structure, this thesis optimizes thebridge’s mechanical strength in order to the main and the auxiliary bridge are fullyutilized.Finally, in order to improve the structural strength’s margin, this thesis proposes aribbed rotor structure, and studies its mechanical strength and electromagneticproperties.The results show that the interior permanent magnet rotor’s ribbed mechanicalstructural can demand the requirements and its’s electromagnetic properties are betterthan others. So,the rotor of ribbed mechanical structural is more suitable for higherspeed applications.