Magnetic Field Analysis of Surface-Mounted Permanent-Magnet Motors

2011 ◽  
Vol 52-54 ◽  
pp. 285-290
Author(s):  
Yi Chang Wu ◽  
Feng Ming Ou ◽  
Bo Wei Lin
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Circuit Model ◽  
Field Analysis ◽  
Permanent Magnet Motors ◽  
Element Analysis ◽  
Magnetic Field Analysis ◽  
Field Estimation ◽  
The Magnetic Field

The prediction of the magnetic field is a prerequisite to investigate the motor performance. This paper focuses on the magnetic field estimation of surface-mounted permanent-magnet (SMPM) motors based on two approximations, i.e., the magnetic circuit analysis and the finite-element analysis (FEA). An equivalent magnetic circuit model is applied to analytically evaluate the magnetic field of a SMPM motor with exterior-rotor configuration. The two-dimensional FEA is then applied to numerically calculate the magnetic field and to verify the validity of the magnetic circuit model. The results show that the errors between the analytical predictions and FEA results are less than 6%. It is of benefit to further design purposes and optimization of SMPM motors.

Magnetostatic Field Analysis of Disk-Type Permanent-Magnet Motors

2013 ◽  
Vol 479-480 ◽  
pp. 390-395
Author(s):  
Yi Chang Wu ◽  
Yi Cheng Hong
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Computing Time ◽  
Circuit Model ◽  
Field Analysis ◽  
Permanent Magnet Motors ◽  
Element Analysis ◽  
Magnetostatic Field ◽  
Acceptable Error

The aim of this paper is to analyze the magnetostatic field of disk-type permanent-magnet motors by utilizing the 1-D equivalent magnetic circuit approach and the finite-element method. A 1-D equivalent magnetic circuit model, which is analogous to an electric circuit model, of the disk-type permanent-magnet motor is proposed. The accuracy of the analytical model is verified by a commercial 3-D finite-element analysis (FEA) package. The result shows that the air-gap flux density is in good agreement with an acceptable error of about 1.66%. The presented magnetic circuit approach is not only an accurate technique in predicting the magnetostatic field of disk-type permanent-magnet motors, but also effectively reduces the computing time. It is especially suitable for the preliminary design and optimization of permanent-magnet motors with axial-flux topologies.

Magnetic Field Analysis of Surface-Mounted Permanent Magnet Motors Using Schwarz-Christoffel Mapping

2012 ◽  
Vol 466-467 ◽  
pp. 940-945
Author(s):  
Xiao Hui Lu ◽  
Jian Hong Liang
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Field Analysis ◽  
The Finite Element Method ◽  
Permanent Magnet Motors ◽  
Basic Tool ◽  
Magnetic Field Analysis ◽  
Optimizing Design ◽  
And Performance ◽  
The Magnetic Field

The paper presents the magnetic field distribution from the armature winding currents in the slotted air gap of surface-mounted permanent magnet (SMPM) motors using the Schwarz- Christoffel(SC) mapping. With the method, a slotted structure of SMPM motors is transformed into a geometrically simpler domain. Compared with the result from the finite element method, the accuracy of the method is verified. The presented work can be a basic tool for optimizing design and performance analysis of permanent magnet motors.

2-D Magnetic Field Analysis of Air Cylinder with MR Sensor

2011 ◽  
Vol 121-126 ◽  
pp. 2706-2709
Author(s):  
Dan Jiang ◽  
Ping Yang ◽  
Kun Jiang
Keyword(s):  
Magnetic Field ◽  
Field Analysis ◽  
Magnetic Flux Density ◽  
Piston Motion ◽  
Element Analysis ◽  
Pneumatic Control ◽  
Magnetoresistive Sensor ◽  
Magnetic Field Analysis ◽  
Working Principle ◽  
The Magnetic Field

As a type of solid state switch, MR (magnetoresistive) sensor detects the air cylinder piston’s position in pneumatic control system. The construction and working principle of the air cylinder with MR sensor are introduced. Using 2-D magnetic field finite element analysis (FEA) method, the magnetic field distribution of air cylinder with piston motion is analyzed. Simulation results are given. The magnetic flux density characteristics are compared between piston wear or not.

scholarly journals Dynamic characteristics of a bitable linear actuator with moving permanent magnet

2004 ◽  
Vol 1 (2) ◽  
pp. 207-214 ◽  
Author(s):  
Ivan Yatchev ◽  
Krastio Hinov ◽  
Vultchan Gueorgiev
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Dynamic Characteristics ◽  
Electromagnetic Force ◽  
Electrical Circuit ◽  
Field Analysis ◽  
Linear Actuator ◽  
Grid Data ◽  
Magnetic Field Analysis ◽  
The Magnetic Field

The dynamic characteristics of an ax symmetrical linear actuator with axially magnetized moving permanent magnet are obtained using combined field and circuit approach. The magnetic field of the actuator has been analyzed using the finite element method over a current-displacement sampling grid. Two field analyses are carried out for each point of the grid - one for the real system and one for the system where the permanent magnet is considered as a soft magnetic body. For each point of the grid, data for the total flux linkage, electromagnetic force and the coil inductance are extracted from the magnetic field analysis. These data are approximated by bicubic spline functions, which are employed in the solution of the system of ordinary differential equations of the electrical circuit and the mechanical motion. Results are obtained for the time variations of the coil current, mover displacement, mover velocity and electromagnetic force. The results for the current and displacement are verified experimentally.

Hybrid Synchronous Motor Magnetic Field Analysis

2015 ◽  
Vol 792 ◽  
pp. 26-32
Author(s):  
Elena E. Suvorkova ◽  
Yuriy N. Dementiev ◽  
Lev K. Burulko
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
Field Analysis ◽  
Permanent Magnet Motor ◽  
Magnetic Field Analysis ◽  
Hybrid Motor ◽  
The Magnetic Field ◽  
Starting Torque ◽  
Made In

This paper introduces researching results of hybrid synchronous motor rotor permanent-magnet part magnets’ magnetization influence on its starting torque. The magnetic field analysis is made in reluctance synchronous motor and synchronous permanent-magnet motor, as main parts of the hybrid motor.

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