Analysis of Permanent Magnet Demagnetization Effect Outer-rotor Hybrid Excitation Flux Switching Motor

2017 ◽  
Vol 8 (1) ◽  
pp. 255
Author(s):  
M. Z. Ahmad ◽  
E. Sulaiman ◽  
S.K. Rahimi ◽  
G. M. Romalan ◽  
M. Jenal
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Permanent Magnet ◽  
Critical Issue ◽  
Operating Conditions ◽  
Outer Rotor ◽  
Hybrid Excitation ◽  
Final Design ◽  
Very High ◽  
Flux Switching Motor

This paper addresses the irreversible permanent magnet (PM) demagnetization analysis of hybrid excitation flux switching motor (HEFSM) with outer-rotor configuration. PM demagnetization cause the PM strength used in the motor significantly reduces and hence contributes less torque performance. The study is focused on thermal analysis and conducted at various temperature up to as high as 180 degrees Celsius which has a tendency to be demagnetized. Therefore, PM demagnetization is among a critical issue and influences the choice of the applied motor. The analysis is carried out based on finite element method (FEM) and percentage of PM demagnetization is then calculated. Finally, based on simulated and calculated results the final design outer-rotor HEFSM has only 0.85 percent PM demagnetization at very high temperature and obviously the is no PM demagnetization at normal operating conditions.

Design Optimization of Single-Phase Outer-Rotor 8S-8P Hybrid Excitation Flux Switching Motor for Electric Vehicle

2014 ◽  
Vol 695 ◽  
pp. 761-764
Author(s):  
Mohamed Mubin Aizat Mazlan ◽  
Erwan Sulaiman ◽  
Md Zarafi Ahmad ◽  
Zhafir Aizat Husin ◽  
Hassan Ali Soomro
Keyword(s):  
Design Optimization ◽  
Optimization Design ◽  
Single Phase ◽  
Direct Drive ◽  
Element Analysis ◽  
Outer Rotor ◽  
Hybrid Excitation ◽  
Final Design ◽  
Advance Research ◽  
Flux Switching Motor

Nowadays, in-wheel motors applied in pure electric vehicles (EVs) propulsion systems have attracted great attention in advance research and development. In-wheel direct drive provides quick torque response, higher efficiency, weight reduction, and increased vehicle space. As one of alternative, a new design of outer-rotor hybrid excitation flux switching motor (ORHEFSM) for in-wheel drive EV is proposed. In this paper, the optimization design of single-phase 8S-8P outer rotor HEFSM is analysed. Open and close circuit of initial and final design is compared based on 2-D finite element analysis (FEA). The design optimization has been made on the initial design machine shows that there is great enhancement on torque and power.

Model-based model predictive control for a direct-driven permanent magnet synchronous generator with internal and external disturbances

2019 ◽  
Vol 42 (3) ◽  
pp. 586-597 ◽  
Author(s):  
Li Shengquan ◽  
Li Juan ◽  
Tang Yongwei ◽  
Shi Yanqiu ◽  
Cao Wei
Keyword(s):  
Permanent Magnet ◽  
Control Method ◽  
Synchronous Generator ◽  
Critical Issue ◽  
Operating Conditions ◽  
Maximum Power ◽  
External Disturbances ◽  
Permanent Magnet Synchronous Generator ◽  
Model Based ◽  
Wide Range

This paper deals with the critical issue in a direct-driven permanent magnet synchronous generator (PMSG)-based wind energy conversion system (WECS): the rejection of internal and external disturbances, including the uncertainties of external environment, rapid wind speed changes in the original parameters of the generator caused by mutative operating conditions. To track the maximum power, a maximum power point tracking strategy based on model predictive controller (MPC) is proposed with extended state observer (ESO) to attenuate the disturbances and uncertainties. In real application, system inertia and the system parameters vary in a wide range with variations of wind speeds and disturbances, which substantially degrade the maximum power tracking performance of wind turbine. The MPC design should incorporate the available model information into the ESO to improve the control efficiency. Based on this principle, a model-based MPC with ESO control structure is proposed in this paper. Simulation study is conducted to evaluate the performance of the proposed control strategy. It is shown that the effect of internal and external disturbances is compensated in a more effective way compared with the ESO-based MPC approach and traditional proportional integral differential (PID) control method.

Optimization of 6S-14P E-Core Hybrid Excitation Flux Switching Motor for Hybrid Electric Vehicle

2014 ◽  
Vol 695 ◽  
pp. 770-773
Author(s):  
Siti Nur Umira Zakaria ◽  
Erwan Sulaiman
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicle ◽  
Electric Motor ◽  
Hybrid Electric Vehicle ◽  
Combustion Engine ◽  
Permanent Magnet Synchronous Motor ◽  
Excitation Coil ◽  
Hybrid Excitation ◽  
Hybrid Electric ◽  
Flux Switching Motor

Research on hybrid electric vehicle (HEV) which combined battery based electric motor and conventional internal combustion engine (ICE) have been intensively increased since the last decade due to their promising solution that can reduce global warming. Some examples of electric motors designed for HEV propulsion system at present are dc motor, induction motor (IM), interior permanent magnet synchronous motor (IPMSM) and switched reluctance motor (SRM). Although IPMSMs are considered to be one of the successful electric motor used in HEVs, several limitations such as distributed armature windings, un-control permanent magnet (PM) flux and higher rotor mechanical stress should be resolved. In this paper, design improvement of E-Core hybrid excitation flux switching motor (HEFSM) for hybrid electric vehicles (HEVs) applications are presented. With concentrated armature and field excitation coil (FEC) windings, variable flux capability and robust rotor structure, performances of initial and improved 6S-14PE-Core HEFSM are analyzed. The improved topology has achieved highest torque and power of 246.557Nm and 187.302 kW, respectively.

scholarly journals Permanent magnet flux switching motor technology as a solution for high torque clean electric vehicle drive

2019 ◽  
Vol 10 (2) ◽  
pp. 575
Author(s):  
Enwelum I. Mbadiwe ◽  
Erwan Sulaiman ◽  
Zarafi Md. Ahmad ◽  
M.F. Omar
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicle ◽  
Sheet Steel ◽  
Fea Model ◽  
Salient Pole ◽  
Outer Rotor ◽  
Rotor Pole ◽  
High Torque ◽  
Flux Path ◽  
Flux Switching Motor

<span lang="EN-US">A breakthrough in this century has been the development of electric vehicle which is propelled by electric motor powered by electricity. Already, many electric motors have been used for electric vehicle application but performances are low. In this paper, a permanent magnet motor technology using unconventional segmented rotor for high torque application is presented. Unlike conventional motors, this design, flux switching motor (FSM) is an advance form of synchronous machine with double rotating frequency. It accommodates both armature winding and flux source on the stator while the rotor is a simple passive laminated sheet steel. Conventionally, rotor of the maiden FSM and many emerging designs have focused on the salient pole, this design employs segmented rotor. Segmented rotor has advantages of short flux path more than salient rotor pole resulting in high flux linkage. Geometric topology of the proposed motor is introduced. It consists of 24Stator-14Pole using PM flux source with alternate stator tooth armature winding. The 2D-FEA model utilized JMAG Tool Solver to design and analyze motor’s performance in terms of torque with average torque output of 470Nm. The suitability of segmented outer-rotor FS motor as a high torque machine, using permanent magnet technology is a reliable candidate for electric vehicle.</span>

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