A survey of mechanical and electromagnetic design techniques for permanent-magnet motor flux-weakening enhancement

2012 ◽  
Author(s):  
R. Menis ◽  
M. Mezzarobba ◽  
A. Tessarolo
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motor ◽  
Electromagnetic Design ◽  
Design Techniques ◽  
Flux Weakening

scholarly journals Electromagnetic Design and Loss Calculations of a 1.12-MW High-Speed Permanent-Magnet Motor for Compressor Applications

2016 ◽  
Vol 31 (1) ◽  
pp. 132-140 ◽  
Author(s):  
Fengge Zhang ◽  
Guanghui Du ◽  
Tianyu Wang ◽  
Fengxiang Wang ◽  
Wenping Cao ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Motor ◽  
Electromagnetic Design

A Novel Flux-Weakening Structure of High-Speed Permanent Magnet Motor Based on the Soft Ferrite

2013 ◽  
Vol 694-697 ◽  
pp. 1508-1511
Author(s):  
Xing Hua Wang ◽  
Xue Yuan Lin ◽  
Ming Hui Li ◽  
Yu Chen ◽  
Cheng Hui Zhang
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Resistivity ◽  
Permanent Magnet Motor ◽  
Soft Magnetic ◽  
Low Loss ◽  
Magnetic Resistance ◽  
The Magnetic Field ◽  
Soft Ferrite ◽  
Flux Weakening

Soft ferrite has the characteristics of high permeability, high resistivity, low loss. Based on this, a new flux-weakening structure of high-speed permanent magnet motor was presented. The structure relies on changing the saturation of soft magnetic ferrite to change the equivalent magnetic resistance of permanent magnet magnetic circuit in the motor, so the main flux of the permanent magnet motor can be reduced. By the 3D Finite Element analyses, the magnetic field distribution characters in the air gap can be pointed out. The analysis results prove the flux-weakening method is presented in this paper is correct and feasible. It can provide a practical flux-weakening method of the high-speed PM motor.

A Two-Phase Framework for Linear Permanent-Magnet Machines and Multi-Axis Stages With Magnetic Levitation

2014 ◽  
Author(s):  
Vu Huy Nguyen ◽  
Won-jong Kim
Keyword(s):  
Permanent Magnet ◽  
Controller Design ◽  
Magnetic Levitation ◽  
Moving Frame ◽  
Permanent Magnet Machines ◽  
Permanent Magnet Motor ◽  
Two Phase ◽  
Electromagnetic Design ◽  
Force Components ◽  
Force Calculation

This paper presents the electromagnetic design and experimental validation of a new framework for linear permanent-magnet (PM) machines with magnetic levitation. In this framework, a single forcer, which can generate two force components in two perpendicular directions, consists of a stationary Halbach magnet array and two Lorentz coils with a phase difference of 90° or 270°. Any number of coil pairs can be attached on the same moving frame to work with a common magnet array or matrix, forming a linear or planar permanent-magnet motor. Key advantages of this framework are simple force calculation, linear force, and a reduced number of coils for force generation and allocation in multi-axis positioners. The proposed framework effectively allows for decoupled dynamics of multi-axis stages, simplifying their linear controller design and real-time implementation. This framework is experimentally verified by a high-precision 6-degree-of-freedom (6-DOF) magnetically–levitated (maglev) stage.

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