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.

Analytical Calculation of Slotless Permanent Magnet Motor Based on Soft Ferrite

2013 ◽  
Vol 397-400 ◽  
pp. 501-504
Author(s):  
Xin Yi Zhang ◽  
Xing Hua Wang ◽  
Ming Hui Li ◽  
Xue Qin Zhang
Keyword(s):  
Finite Elements ◽  
Permanent Magnet ◽  
High Speed ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Motor ◽  
Leakage Flux ◽  
Brushless Motor ◽  
Prototype Test ◽  
Soft Ferrite

High-speed slotless permanent magnet brushless motor based on soft ferrite adopts a large effective air gap structure. For the large effective air-gap, the air-gap flux distribution becomes uneven and the end leakage flux significantly increases. Thus, the traditional analytical method of the phase EMF is inapplicable. This paper deduces the analytical expression of the phase EMF based on the analytical calculation of the air-gap field and analyzes the distribution of the end leakage flux by 3D finite elements methods. Then the end leakage flux is considered by a correction factor of the core length. Finally the analytical calculation method is proved to be feasible by the comparison between the finite elements results and the prototype test results.

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

Thermal and Stress Analysis for a High-speed Permanent Magnet Motor with Solid Rotor

2021 ◽  
Author(s):  
Zhenning Qi ◽  
Yue Zhang ◽  
He Zhang ◽  
Xiuhe Wang ◽  
Huijun Wang ◽  
...  
Keyword(s):  
Stress Analysis ◽  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Motor

scholarly journals Simulation of the dynamic behaviour of a permanent magnet linear actuator

2010 ◽  
Vol 23 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Ivan Yatchev ◽  
Vultchan Gueorgiev ◽  
Racho Ivanov ◽  
Krastio Hinov
Keyword(s):  
Permanent Magnet ◽  
Dynamic Behaviour ◽  
Electric Circuit ◽  
Linear Actuator ◽  
Soft Magnetic ◽  
Mechanical Motion ◽  
Field Problem ◽  
Motion Problems ◽  
Long Stroke ◽  
The Magnetic Field

The paper presents simulation of the dynamics of a permanent magnet linear actuator with soft magnetic mover and relatively long stroke 60 mm. The simulation is carried out using decoupled approach where the magnetic field problem is solved separately from the electric circuit and mechanical motion problems. The obtained results are compared with experiment. .

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