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Application of Permanent Magnet Synchronous Motor (PMSM) has been increasingly popular in Electric Vehicle (EV) area since cost-effective magnetic materials were recently discovered. This paper mainly presents numerical calculation and experimental measurement of core loss of PMSM at various frequencies among 50Hz, 100Hz, 200Hz and 400Hz. A novel design strategy of PMSM will be described. The motor...
This paper focuses on the measurement of magnetic properties of soft magnetic composite(SMC) materials at high frequencies and high flux densities. Since SMC materials are very promising in the design of high-frequency and high power density motor, the losses at a very high frequency are needed to be measured and then the calculation of the performance of the machine will be accurate. In this study,...
The efficiency of motor can be increased by optimizing stator, rotor slot design and using more materials, but there is limit within the narrow space of motor frame. Because of limited dimension, high quality material can be adapted, such as copper bar instead of aluminum bar, or low core loss Si-steel. However, adapting low core loss electrical steel does not always mean reduction of core loss. Because...
Nowadays, rotating machines are widely used in most industries. Because of that, magnetic properties of soft magnetic material are actively studied under 1-D and 2-D magnetic flux excitations in order to estimate the total core loss produced by the material during the magnetization. SOMALOY 700 material, a soft magnetic composite material, is considered in this paper. 2-D magnetic measurement has...
Core losses of nanocrystalline alloy high frequency transformer (HFT) are calculated by adopting the finite element method with magnetic hysteresis effects considered. A normal Preisach model is used to represent the magnetic hysteresis during the numerical simulation. The normal Preisach model features with simple formulations and easy parameters identification. A dynamic circuit model of laminated...
A two-dimensional (2-D) field-circuit coupled finite element model of induction motor (IM) is built. The equivalent circuit of three-phase squirrel cage rotor is modeled. Based on time-stepping finite elements analysis (T-S FEA), core loss in the stator of a no-load IM under sinusoidal and Sinusoidal Pulse Width Modulation (SPWM) excitations is studied. The rotating flux density distributions with...
In this paper, a 5kW novel multistage axial-flux permanent magnet machine (M-AFPM) is analyzed. As a key part of the machine, stator core of silicon steel and SMC are studied by 3D finite element method (FEM) respectively. No-load, full-load, magnetic field distribution, core loss, etc. are calculated. FEM result indicates that SMC-materials have almost equal influence on EMF, magnetic field distribution...
For the motorized spindle applications, the interior permanent magnet (IPM) machines is preferred to be chosen than surface mounted permanent magnet (SPM) machines, since it has better magnet protection ability, easier magnet installation, and less magnet loss. However, IPM machines usually has higher stator core loss, higher torque ripple, etc. Especially, when the machine is working under over loading...
This paper presents a method to calculate the core losses in SiFe laminations under magnetizations with DC bias and harmonics. DC bias is usually generated by the ground return current of high voltage direct current (HVDC) system intrude into the windings of neutral-grounded transformers, which leads to increase of harmonics and core loss. For accurate calculation of core losses under DC bias, the...
Modern developments in advanced material technology have produced new magnetic materials capable of dealing with high frequencies. However, such metals typically have low mechanical strength and they are found to be brittle. In order to manufacture electromechanical devices with such new materials, it has to be reinforced with a mechanically strong structure. One option is to incorporate stronger...
Spoke type is one of the most popular rotor configurations in ferrite interior permanent magnet synchronous machines. In such configuration, the focusing factor of permanent magnet flux is of essential importance to achieve high performance. Large number of rotor poles is usually preferred to boost the air-gap flux density from the low-energy ferrite permanent magnets. Besides, multi-layer magnet...
The eddy current loss (ECL) impacts the stability of high speed permanent magnet synchronous motor (HSPMSM), the high efficiency and temperature of it. This paper analyzes the ECL in rotor by calculation method and separates it by experiment. In all kinds of losses, core loss and coil loss can be separated by traditional calculation method with related parameters being tested actually. Besides, Windage...
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