scholarly journals Analytical Calculation for Predicting the Air Gap Flux Density in Surface-Mounted Permanent Magnet Synchronous Machine

2017 ◽  
Vol 12 (2) ◽  
pp. 769-777 ◽  
Author(s):  
Yan-li Feng ◽  
Cheng-ning Zhang
Keyword(s):  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Calculation ◽  
Synchronous Machine ◽  
Air Gap ◽  
Permanent Magnet Synchronous Machine

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

Study of Magnetics Performance of Inset Permanent Magnet Synchronous Machine (Inset - PMSM) Using Finite Element Method

2012 ◽  
Vol 260-261 ◽  
pp. 554-558 ◽  
Author(s):  
Jeeng Min Ling ◽  
Tajuddin Nur
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
Mechanical Energy ◽  
Synchronous Machine ◽  
Air Gap ◽  
Electrical Machine ◽  
Permanent Magnet Synchronous Machine ◽  
Pole Structure ◽  
Rotor Core ◽  
Rotor Structure

Inset Permanent Magnet synchronous machine (Inset - PMSM) is a specific kind of permanent magnet synchronous machine. The magnetic flux in air gap of electrical machine is one of the important parameters and it imply to the electric or mechanical energy of machine. Using radial pole structure, the characteristics of magnetic field in air gap of an Inset PMSM with 6 poles and 36 slots are simulated. In this paper, we simulated and observed the influence of axial channel rotor core of Inset-PMSM to the value/quantity of magnetic flux in air gap. Magnetic flux quality is also considered in this simulation. The simulations were compared with the conventional rotor structure. The flux density per pole in the air gap was measured with three different angles, 00, 250 and 400.

scholarly journals Fast analytical calculation of the air-gap flux density in an outer-rotor permanent-magnet brushless motor

2018 ◽  
Vol 189 ◽  
pp. 06008
Author(s):  
Shuaichen Ye ◽  
Xiaoxian Yao
Keyword(s):  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Analytical Calculation ◽  
Air Gap ◽  
Element Analysis ◽  
Design And Optimization ◽  
Brushless Motor ◽  
Practical Engineering ◽  
Analytical Result

The air-gap flux density must be considered in the design and optimization of the structure parameters of permanent-magnet brushless motors (PMBMs). Existing methods for calculating the air-gap flux density are complex and thus cannot be easily applied in practical engineering. This paper presents a fast analytical method for calculating the air-gap flux density that is more efficient and practicable than existing methods. A lumped magnetic circuit model is presented to illustrate the proposed method. Then, the analytical result and finite element analysis (FEA) results obtained for a PMBM prototype are compared. The results indicate that the error between the two methods does not exceed 5%. Therefore, the proposed analytical method is highly efficient and accurate, which may be applied in the motor pro-design process of many engineering instruments.

Sign in / Sign up

Export Citation Format

Share Document