Three-dimensional analytic model of permanent magnet axial flux machine

1998 ◽  
Vol 34 (6) ◽  
pp. 3897-3901 ◽  
Author(s):  
Yu.N. Zhilichev
Keyword(s):  
Permanent Magnet ◽  
Three Dimensional ◽  
Analytic Model ◽  
Axial Flux

A Nonlinear Magnetic Circuit Analysis of a Permanent Magnet Biased Homopolar Bearing

1999 ◽  
Author(s):  
Andrew Kenny ◽  
Alan Palazzolo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Analytical Methods ◽  
Magnetic Circuit ◽  
Three Dimensional ◽  
Magnetic Bearing ◽  
Axial Flux ◽  
Element Analysis ◽  
Good Agreement

Abstract A magnetic circuit model for a homopolar magnetic bearing is presented. This model connects the fore and aft circumferential flux paths with axial flux paths through the rotor and back iron. The bias flux is provided by a circumferential permanent magnet in the back iron. Results for an analysis using the nonlinear Hyperco50 B-H curve are presented. These results are compared to the results of a three dimensional magnetostatic finite element analysis. The two analytical methods are in good agreement and show that the control flux in this type of bearing follows both circumferential and axial paths.

An analytical approach and finite element evaluation of leakage fluxes of the PMs in a non-slotted axial flux permanent magnet machine

2018 ◽  
Vol 37 (3) ◽  
pp. 1085-1098
Author(s):  
Reza Mirzahosseini ◽  
Ahmad Darabi ◽  
Mohsen Assili
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Flux Density ◽  
Accurate Determination ◽  
Three Dimensional ◽  
Air Gap ◽  
Design Stage ◽  
Axial Flux ◽  
Content Type ◽  
Leakage Flux

Purpose Consideration of leakage fluxes in the preliminary design stage of a machine is important for accurate determination of machine dimensions and prediction of performance characteristics. This paper aims to obtain some equations for calculating the average air gap flux density, the flux density within the magnet and the air gap leakage flux factor. Design/methodology/approach A detailed magnetic equivalent circuit (MEC) is presented for a TORUS-type non-slotted axial flux permanent magnet (TORUS-NS AFPM) machine. In this MEC, the leakage flux occurring between two adjacent magnets and the leakage fluxes taking place between the magnet and rotor iron at the interpolar, inner and outer edges of the magnets are considered. According to the proposed MEC and by using flux division law, some equations are extracted. A three-dimensional finite element method (FEM) is used to evaluate the proposed analytical equations. The study machine is a 3.7 kW and 1,400 rpm TORUS-NS AFPM machine. Findings The air gap leakage flux factor, the average air gap flux density and the flux density within the magnet are calculated using the proposed equations and FEM. All the results of FEM confirm the excellent accuracy of the proposed analytical method. Originality/value The new equations presented in this paper can be applied for leakage flux evaluating purposes.

Design and analysis of an axial flux permanent magnet motor for the direct drive radial piston pump

2019 ◽  
Vol 233 (19-20) ◽  
pp. 7077-7088
Author(s):  
Jingxiang Li ◽  
Xingwang Meng ◽  
Peng Dong ◽  
Shengdun Zhao
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Three Dimensional ◽  
Piston Pump ◽  
Direct Drive ◽  
Axial Flux ◽  
Drive Motor ◽  
Dimensional Finite Element ◽  
New Type ◽  
Three Dimensional Finite Element

Direct drive motor-pumps have attracted a lot of attention from researchers because of high efficiency and compact structure. This paper presents a new type of direct drive motor-pump, which integrates the structure of the radial piston pump and axial-flux permanent-magnet machine. The rotor of the disc motor is fixedly connected to the pump rotor, and the new pump uses a new type of distribution shaft for oil distribution. This structure reduces the intermediate transmission mechanism, and the application of the disc motor further reduces the axial size, the overall volume, and heat dissipation. The efficiency of the entire system has been improved. The three-dimensional finite element method is used to dynamically analyze flow field in the flow channel, which is extracted and simplified. The flow and pressure of the pump meet the design requirements in the simulation. A disc motor was designed for the pump, and the theoretical formula of the disc motor was derived. The initial size of the motor was obtained. The response surface method and three-dimensional finite element are used to optimize the corresponding axial-flux permanent-magnet machine. Loading the torque condition of the pump to the load end of the motor, the response of the motor meets the requirements.

scholarly journals Analysis and Optimization of Axial Flux Permanent Magnet Machine for Cogging Torque Reduction

Mathematics ◽  
2021 ◽  
Vol 9 (15) ◽  
pp. 1738
Author(s):  
Hina Usman ◽  
Junaid Ikram ◽  
Khurram Saleem Alimgeer ◽  
Muhammad Yousuf ◽  
Syed Sabir Hussain Bukhari ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Three Dimensional ◽  
Latin Hypercube Sampling ◽  
Air Gap ◽  
Axial Flux ◽  
Element Analysis ◽  
Cogging Torque ◽  
Basic Source ◽  
Three Dimensional Finite Element ◽  
Torque Ripples

In this paper, a hexagonal magnet shape is proposed to have an arc profile capable of reducing torque ripples resulting from cogging torque in a single-sided axial flux permanent magnet (AFPM) machine. The arc-shaped permanent magnet increases the air-gap length effectively and makes the flux of the air-gap more sinusoidal, which decreases air-gap flux density and hence causes a reduction in cogging torque. Cogging torque is the basic source of vibration, along with the noise in PM machines, since it is the main cause of torque ripples. Cogging torque is independent of the load current and is proportional to the air-gap flux and the reluctance variation. Three-dimensional finite element analysis (FEA) is used in the JMAG-Designer to analyze the performance of the conventional and proposed hexagonal-shaped PM AFPM machines. The proposed shape is designed to reduce cogging torque, and the voltage remains the same as compared to the conventional hexagonal-shaped PM machine. Further, optimization is performed by utilizing an asymmetric overhang. Latin hypercube sampling (LHS) is used to create samples, the kriging method is applied to approximate the model, and a genetic algorithm is applied to obtain the optimum parameters of the machine.

scholarly journals Design of dual rotor axial flux permanent magnet generators with ferrite and rare-earth magnets

2020 ◽  
Vol 33 (4) ◽  
pp. 553-569
Author(s):  
Jawad Faiz ◽  
Tohid Asefi ◽  
Mohammad Khan
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Three Dimensional ◽  
Torque Ripple ◽  
Population Based ◽  
Axial Flux ◽  
Energy Applications ◽  
Rotor Pole ◽  
Mass Minimization ◽  
Population Based Algorithm

This article addresses dual rotor axial flux Ferrite permanent magnet (PM) generator, as an alternative to a surface mounted and spoke types Nd-Fe-B generator which have concentrated windings. The performance parameters of all generators, particularly the efficiency, are identical. The design objective function is the generators mass minimization using a population-based algorithm. To predict the performance of the generators a finite element (FE) technique is applied. Besides, the aims of the design include minimizing cogging torque, examining different rotor pole topologies and different pole arc to pole pitch ratios. Three-dimensional FE technique is employed. It is shown that the surface mounted Ferrite generator topology cannot develop the rated torque and also has high torque ripple. In addition, it is heavier than the spoke type generator. Furthermore, it is indicated that the spoke type Ferrite PM generator has favorable performance and could be an alternative to rare-earth PM generators, particularly in wind energy applications. Finally, the performance of the designed generators is experimentally verified.

Sign in / Sign up

Export Citation Format

Share Document