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The single-phase line-start synchronous reluctance motor (LSSynRM) is suitable for household appliances, but an optimized design of rotor, crucially influences the performance of motor, is hard to obtain. This paper optimizes the rotor design of LSSynRM to make a higher saliency ratio with the trade-off between saliency ratio and synchronizing ability. The mechanical-field-circuit coupled Finite element...
This paper proposes an end-effect equivalent 2D model to analyze back-EMF of high speed permanent magnet synchronous motor(PMSM) in order to consider a leakage flux in the end region of stator and air-gap. Since 2D FEA does not provide a precise analyzing result of back-EMF calculation due to the long airgap, an equivalent back-EMF simulation method is proposed. The proposed model of back-EMF analysis...
Most torque ripple reduction strategies for rotating motor are not suitable for long stator linear synchronous motor (LSLSM). In this paper, the electromagnetic force ripple reduction method for LSLSM based on the structure that the pole pitch of the mover (τm) is different from the pole pitch of the stator (τs) is analyzed. Both mathematical derivation and 2-D finite element method (FEM) are adopted...
In order to increase the output power density and maintainability of the conventional driving system in electric vehicle, the research on magnetic gears is being carried out variously all over the world. In this paper, the design technique of the magnetic-geared permanent magnet synchronous motor(MG-PMSM) is first studied for the application of the MG-PMSM structurally integrated with magnetic gear...
This paper investigates methods of magnet mass reduction in linear flux switching permanent magnet (LFSPM) machines by introducing tapered consequent poles. Based on the finite element analysis (FEA) three different models are designed, investigated and compared. The obtained results indicate that by adopting the proposed tapered ferromagnetic poles a considerable saving of material cost and weight...
The evaporative cooling technology has high cooling efficiency and high reliability and it is a promising cooling method which can be applied to switching mode power supply (SMPS). Thermal simulation is an effective way to analyze the performance of the cooling system, and can provide guidance for the optimization of SMPS. In this paper, thermal simulation models of fully-immersed evaporative cooling...
In this paper, a new single-phase flux switching axial flux permanent magnet motor (FS AFPM) is presented. It has a double stator and single rotor (DSSR) disc-type structure. The rotor disc is a simple salient pole rotor, and it is sandwiched between the two stator discs. The permanent magnets (PMs) are embedded in the stator discs, which also contain the single-phase windings. To enhance the self-starting...
Ia this paper, a Halbach arc linear permanent magnet machine (ALPMM) for large telescope application is analyzed by finite element method. The ALPMM consists of one rotor and three segmental stators in which the stator core and windings are characterized by “C” shape. A 3-D air-gap, which can significantly increase the torque density, is formed between the C-shape stator and the rotor. The key electromagnetic...
Electric model based in the duality between the electric and magnetic circuit taking into account the misalignment characteristic of transformer of a Wireless Power Transfer, WPT, is proposed. Being a model based in the constructive characteristic of the transformer the model, it represents better the misalignment effect and the simulation values are more accurate in comparison with the T model that...
This paper presents the design of an Interior permanent magnet (IPM) synchronous machine to improve machine performance by increasing saliency ratio and minimizing the leakage flux through the ribs and air barriers of an IPM machine. A bar-type IPM basic model is taken and two variables, variable 1 as factor-A and variable 2 as factor-B are analyzed. Factor-A is the radial distance of the rotor air...
Linear oscillating motor can produce linear reciprocating movement directly. Due to its special topology and motion type, segmented laminations are generally used as the stator core with coils wound inside. Though it contributes to eddy current elimination and air-forced cooling, the magnetic field suffers from severe saturation in the stator and affects the thrust output severely. In other words,...
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