Alloys for magnetic and electrical components of automotive electric machines

Nowadays, there are different kind of electrical machines which used in the vehicles for different purposes. The state of art of electric machines, associated components and contemporary trends of their development improved according to the demands expecting from electric machines. Recently new topologies of high torque density motors, high speed motors, integrated motor drives and special motors have been developed. Progress in electrical motors is stimulated amongst others by new materials, new areas of applications, impact of power electronics, need for energy saving and new technology challenges. In the market, the development of electric machines also are developing by computer software. In the last years, the car makers are used different kind of machine. In this thesis, the most common ones which are Lundell Alternator(Machine), Induction Machine(IM), Permanent Magnet Synchronous Machine(PMSM), Axial Flux Permanent Magnet Synchronous Machine(AFPMSM), Switched Reluctance Machine(SRM) and Synchronous Reluctance Machine(SYR) are discussed by explaining their properties and duties in the vehicle. The one of the most critical factor together with the design of the machine is also to use proper material in the electrical machines. By considering the material properties , different kind of electrical steels are used to obtain targeted performances. In addition, rising energy costs have created the need for low loss, high permeability, low residual and high efficiency electrical steels to produce energy efficient devices. In the light of new technologies, the permanent magnets are used in the electrical machines. In this thesis, the most common electrical steels and alloys which are Pure Iron(Fe), Iron-Silicon(Fe-Si), Neodymium-Iron-Boron(Nd-Fe-Br) and Iron-Cobalt-Vanadium(Fe-Co-V) are defined as most effective one in the market by explaining their magnetic properties, compositions, phases and processes