scholarly journals Electromagnetic Performances Evaluation of an Outer-Rotor Flux-Switching Permanent Magnet Motor Based on Electrical-Thermal Two-Way Coupling Method

2017 ◽  
Author(s):  
Zhengming Shu ◽  
Xiaoyong Zhu ◽  
Li Quan ◽  
Yi Du ◽  
Chang Liu
Keyword(s):  
Permanent Magnet ◽  
High Efficiency ◽  
Design Method ◽  
Coupling Method ◽  
Heat Sources ◽  
Permanent Magnet Motor ◽  
Output Torque ◽  
Outer Rotor ◽  
Different Temperatures ◽  
Rotor Flux

Flux-switching permanent magnet (FSPM) motors have gained increasing attention in the electric vehicles (EVs) applications due to the advantages of high power density, high efficiency. However, the heat sources of both permanent magnet (PM) and armature winding are located on the limited stator space in the FSPM motors, which may result in the PM overheated and irreversible demagnetization caused by temperature rise and it is often ignored in the conventional thermal analysis. In this paper, a new electrical-thermal two-way coupling design method is proposed to analyze the electromagnetic performances, where the change of PM material characteristics under different temperatures is taken into consideration. Firstly, the motor topology and design equations are introduced. Secondly, the demagnetization curves of PM materials under different temperatures are modeled due to PM materials are sensitive to the temperature. And based on the electrical-thermal two-way coupling method, the motor performances are evaluated in details, such as the load PM flux linkage and output torque. Then, the motor is optimized, and the electromagnetic performances between initial and improved motors are compared. Finally, a prototype motor is manufactured, and the results are validated by experimental measurements.

scholarly journals A Novel Modular-Stator Outer-Rotor Flux-Switching Permanent-Magnet Motor

Energies ◽  
2017 ◽  
Vol 10 (7) ◽  
pp. 937 ◽  
Author(s):  
Jing Zhao ◽  
Yun Zheng ◽  
Congcong Zhu ◽  
Xiangdong Liu ◽  
Bin Li
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motor ◽  
Outer Rotor ◽  
Rotor Flux

scholarly journals Electromagnetic-Thermal Integration Design of Permanent Magnet Motor for Vehicles

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Shijun Chen ◽  
Qi Zhang ◽  
Surong Huang
Keyword(s):  
Permanent Magnet ◽  
High Performance ◽  
Design Method ◽  
Electromagnetic Properties ◽  
Permanent Magnet Motor ◽  
Element Analysis ◽  
Experiment Platform ◽  
Motor Design ◽  
Dimensional Parameters ◽  
Thermal Integration

To more efficiently design high performance vehicular permanent magnet motor, an electromagnetic-thermal integration design method is presented, which considers both the electromagnetic properties and the temperature rise of motor winding when determining the main dimensional parameters of the motor. Then a 48-slot and 8-pole vehicular permanent magnet motor is designed with this method. The thermomagnetic coupling design is simulated and validated on the basis of multiphysical domain on finite element analysis. Then the prototype is analyzed and tested on a newly built motor experiment platform. It is shown that the simulation results and experimental results are consistent, which validate the accuracy and effectiveness of the new design method. Also this method is proved to well improve the efficiency of permanent magnet motor design.

On the Performances Investigation of Different Surface Mounted Permanent Magnet Machines

2015 ◽  
Vol 6 (3) ◽  
pp. 509
Author(s):  
Mansouri Ali ◽  
Msaddek Hejra ◽  
Trabelsi Hafedh
Keyword(s):  
Permanent Magnet ◽  
Main Idea ◽  
Industrial Applications ◽  
Permanent Magnet Machines ◽  
Element Analysis ◽  
Advantages And Disadvantages ◽  
Output Torque ◽  
Iron Losses ◽  
Outer Rotor ◽  
Current Loading

<table border="1" cellspacing="0" cellpadding="0" width="593"><tbody><tr><td width="387" valign="top"><p>In recent years, permanent magnet machines have become a common choice in many industrial applications. Therefore, several structures have been developed, and the choice of a topology designed for a specified application requires the knowledge of the advantages and disadvantages of different topologies. The present work deals with the evaluation of the performances of different radial flux surface-mounted permanent magnet motors designed for an electric vehicle motor application. The objective of this survey is to show the effect of the rotor position (inner or outer) and the magnets segmentation on the machine output torque and iron losses. In this context, four machines with: (i) inner rotor, (ii) inner rotor segmented magnets, (iii) outer rotor and (iv) outer rotor segmented magnets have been designed and studied. All these machines have the same geometrical dimensions and current loading. The main idea is to develop a machine with smoothness torque, lower torque ondulation, lower iron losses, and which is mechanically robust. Firstly, the output torque of the different structure is computed. Secondly, by means of an improved analytical model coupled with 2 dimensional transient finite element analysis (FEA), the machines iron losses are predicted.</p></td></tr></tbody></table>

scholarly journals A new self-propelled magnetic bearing with helical windings

2016 ◽  
Vol 472 (2196) ◽  
pp. 20160579
Author(s):  
B. Shayak
Keyword(s):  
Permanent Magnet ◽  
Stiffness Matrix ◽  
Control Algorithm ◽  
High Efficiency ◽  
Permanent Magnet Synchronous Motor ◽  
Magnetic Bearing ◽  
High Load ◽  
Output Torque ◽  
Three Phase ◽  
Torque Angle

In this work, a design is proposed for an active, permanent magnet based, self-propelled magnetic bearing, i.e. levitating motor having the following features: (i) simple winding structure, (ii) high load supporting capacity, (iii) no eccentricity sensors, (iv) stable confinement in all translational dimensions, (v) stable confinement in all rotational dimensions, and (vi) high efficiency. This design uses an architecture consisting of a helically wound three-phase stator, and a rotor with the magnets also arranged in a helical manner. Active control is used to excite the rotor at a torque angle lying in the second quadrant. This torque angle is independent of the rotor's position inside the stator cavity; hence the control algorithm is similar to that of a conventional permanent magnet synchronous motor. It is motivated through a physical argument that the bearing rotor develops a lift force proportional to the output torque and that it remains stably confined in space. These assertions are then proved rigorously through a calculation of the magnetic fields, forces and torques. The stiffness matrix of the system is presented and a discussion of stable and unstable operating regions is given.

In-Wheel Traction Motor: a Case Study for Formula SAE Electric

2020 ◽  
Author(s):  
Abraão Regis Guia ◽  
Rafael A. Silva ◽  
Igor A. Pires ◽  
Thales A. C. Maia
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
High Power ◽  
Design Method ◽  
Permanent Magnet Synchronous Machine ◽  
High Power Density ◽  
Formula Sae ◽  
Output Torque ◽  
Wheel Drive

This paper discusses in-wheel electric tractive systems, bringing as a case study the finite element design of a Fractional Slot Permanent Magnet Synchronous Machine with non-Overlaping Winding (FSPMSM) for an all-wheel drive Formula Student powertrain. The goal is to obtain a system that fits a 10” rim wheel, with a high power density that enables a 280 kg vehicle to accelerate over 75 meters in less than 4 seconds. Iterating the design method to maximize the output torque, the simulations indicate that a single 12,000 rpm machine can provide continuous 17.7 kW at the 600 Vdc system.

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