The main requirements for a rotating electric machine are the torque/power density and the energy efficiency. Producing an efficient electric machine required not only studying and analysing the electromagnetic properties but also deeper thermal analysis. It has been found that attention to the thermal design can be improve the total machine performance. In this paper a thermal model of the two-layer and spoke-type ferrite interior permanent magnet (IPM) machines is developed. FEA models are built to run the thermal studies and temperature distribution of the machine under different operating conditions. A prototype machine is built and tested for the experimental validations of the FEA. A prototype machine is tested under various working conditions. The testing results validate analytical model and the FEA methods.
Frozen permeability approach (FP) is employed to separate the average torque components (reluctance and permanent magnet torque) and for the inductance calculation for a Unique Ferrite Multi-Layer Spoke-type Interior Permanent Magnet Motor. Finite element analyses (FEA) models are built to provide many results help to offer more insight analysis. Three factors are taking in account to analyse their effects: permanent magnetism, armature currents of stator and angular rotor position. Also, different saturation levels are analysed, to reveal the influence of magnetic saturation and crosscoupling. These detailed analyses are providing valuable insights for permanent machine design and optimization.
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