In modern times, the application of everlasting magnet (PM) synchronous motors in electrical vehicles provides increased rapidly. This is especially because PMSMs can achieve higher speeds than regular AC induction motors. Nonetheless, the high speed operation of PMSMs poses more challenges in electromagnetic style, thermal management and kinetic structure. In order to improve the efficiency and strength density of PMSMs, a lot of techniques have been designed. These include optimizing the particular iron core loss, improving the magnetic induction intensity and harmonic components of different positions while in the iron core, reducing the actual copper consumption by taking on the toroidal winding shape, and minimizing the availablility of turns on the conclusion winding.

The most important challenge in the development of high-speed PMSMs is to lessen the rotor iron core loss. For this intent, various measures such when adjusting the stator slot opening width, optimizing your pole-slot fit, using a slant slot as well as a magnetic slot wedge are already proposed [1]. However, these methods can merely weaken the eddy current losses inside rotor but cannot entirely reduce them. In accessory, they require complex plus expensive control systems.

Another important issue is always to improve the stability with PMSMs at high rates of speed. For this purpose, using non-contact bearings is a highly effective solution. Among these, air bearings and magnetic levitation bearings include the most promising. In evaluation to ball bearings, these non-contact bearings can support the rotor for a much lower mass that will operate under higher connections. Nevertheless, their cost continues to prohibitive.

To further reduce the rotor iron loss of PMSMs, it is essential to optimize the installation parameters in the permanent magnets. This is often achieved by applying a different method for analyzing in addition to optimizing the eddy current distribution of the magnetic circuits. This method uses a combination of the finite element model and also a simplified physical model. The resulting model works for calculating the temperature field of an double-layer V-type HSPMM under many different conditions.

In contrast in order to previous research, which is targeted on changing the rotor along with stator structures or the particular cooling mode to reduce the operating temperature belonging to the HSPMM, this method won't require any structural changes. It also focuses about reducing the copper as well as iron loss by changing the installation parameters in the permanent magnets. Moreover, the outcomes of this method have been verified by comparing the electromagnetic models on the HSPMM with those belonging to the ETCM. As shown throughout Fig. 7, the converge accuracy and reliability between FEA and MEC can be above 0. 95, so that this method can save numerous times in the electromagnetic calculation means of HSPMMs. Additionally, the converged accuracy in addition has been verified with the experimental results of a test model. These results indicate the ETCM method and that temperature field optimization method proposed within this paper are reliable and efficient.