Modeling and simulation analysis of the hybrid excitation synchronous machine system utilizing tooth harmonic for excitation

2016 ◽  
Vol 35 (2) ◽  
pp. 540-555 ◽  
Author(s):  
Yonghong Xia ◽  
Junbo Liu ◽  
Bo Xu ◽  
Hongjian Wu
Keyword(s):  
Permanent Magnet ◽  
Operation Mode ◽  
Structural Features ◽  
Current Waveform ◽  
Standard State ◽  
State Equations ◽  
Permanent Magnet Machine ◽  
Content Type ◽  
Machine System ◽  
Hybrid Excitation

Purpose – The purpose of this paper is to propose a novel hybrid excitation permanent magnet synchronous generator (HEPMSG) utilizing tooth harmonic for excitation, the structural features and operation principle of which are also described. Design/methodology/approach – To obtain the operation performance quickly, this paper derives the mathematical model of the machine system represented by circuit, and analyzes the operation mode of rectifier circuit in the tooth harmonic excitation system, then the standard state equations for each operation mode are obtained. Combining the inductance parameter of this machine with the load resistance and inductance, the armature current waveform, the field current waveform and tooth harmonic winding current waveform are obtained by using the numerical method to solve the standard state equation. Findings – Comparing with the experimental results, the availability of the principle and the validity of the model of the machine system are verified. Practical implications – This HEPMSG is a new brushless self-excited and self-regulated generator, which is suitable for an independent power source. Originality/value – Unlike the existing hybrid excitation permanent magnet machine, this HEPMSG utilized the inherent tooth harmonic EMF of the rotor to adjust the air-gap magnetic field of the permanent magnet machine.

Comparison between induction machine and interior permanent magnet machine for electric vehicle application

2016 ◽  
Vol 35 (2) ◽  
pp. 572-585 ◽  
Author(s):  
Y. Guan ◽  
Z.Q. Zhu ◽  
I.A.A. Afinowi ◽  
J.C. Mipo ◽  
P. Farah
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicle ◽  
Induction Machine ◽  
Outer Diameter ◽  
Permanent Magnet Machine ◽  
Content Type ◽  
Electric Loading ◽  
Material Cost ◽  
Interior Permanent Magnet ◽  
Speed Characteristic

Purpose – The purpose of this paper is to make a quantitative comparison between induction machine (IM) and interior permanent magnet machine (IPM) for electric vehicle applications, in terms of electromagnetic performance and material cost. Design/methodology/approach – The analysis of IM is based on an analytical method, which has been validated by test. The analysis of IPM is based on finite element analysis. The popular Toyota Prius 2010 IPM is adopted directly, and the IM is designed with the same stator outer diameter and stack length as Prius 2010 IPM for a fair comparison. Findings – The torque capability of IM is lower than IPM for low electric loading and competitive to IPM for high electric loading. The maximum torque/power-speed characteristic of IM is competitive to IPM; while the rated torque/power-speed characteristic of IM is poorer than IPM. The power factor of IM is competitive and even better than IPM for high electric loading in low-speed region. The torque ripple of IM is comparable to IPM for high electric loading and much lower than IPM for low electric loading. The overall efficiency of IM is lower than IPM, and the maximum efficiency of copper squirrel cage IM is approximately 2-3 percent lower than IPM. The material cost of IM is about half of IPM when IM and IPM are designed with the same stator outer diameter and stack length. Originality/value – The electromagnetic performances and material costs of IM and IPM are quantitatively compared and discussed.

Analytical approach for spoke-type permanent magnet machine including finite permeability of iron core

2020 ◽  
Vol 39 (2) ◽  
pp. 333-352
Author(s):  
Brahim Ladghem Chikouche ◽  
Rachid Ibtiouen
Keyword(s):  
Permanent Magnet ◽  
Analytical Approach ◽  
Load Condition ◽  
Iron Core ◽  
Element Analysis ◽  
Permanent Magnet Machine ◽  
Content Type ◽  
Ferromagnetic Core ◽  
Analytical Results ◽  
Flux Density Distribution

Purpose The purpose of this study is the introduction of finite permeability of ferromagnetic core in analytical approach for slotted spoke-type permanent magnet machine. Design/methodology/approach A two-dimensional analytical approach of magnetic field distribution is established for spoke-type permanent magnet machine to calculate the flux density distribution in the middle of airgap. The paper presents an analytical subdomain model accounting for stator slotting effect. The governing equations are obtained from Maxwell’s equations by using vector potential in all regions of the machine, i.e. magnet, airgap, stator slots and rotor/stator yoke. The finite element analysis is used to validate the analytical results. Findings It is found that the developed subdomain model including finite permeability of ferromagnetic core is accurate and is applicable for spoke-type permanent magnet machine for no-load and on-load condition. The analytical results are in accurate agreement with the numerical simulation. Originality/value Some assumptions and conditions are presented to improve and simplify the analytical method for analyzing the global saturation for spoke-type permanent magnet machine.

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