Design and Finite Element Analysis of a Novel Permanent Magnet Assisted Reluctance Synchronous Motor

In this paper, a permanent magnet assisted synchronous reluctance machine (PMASRM) with optimized permanent magnet width and asymmetric rotor structure is proposed. A typical PMASRM is selected as the reference motor (Pre-optimized PMASRM). In order to reduce the large torque ripple of conventional PMASRM, an optimization method to design the permanent magnet width is investigated and the Optimized Magnet-width PMASRM is proposed. On this basis, an asymmetric flux barriers structure is proposed to further reduce the torque ripple. Some electromagnetic characteristics including air-gap flux density, no-load back EMF and motor efficiency are examined by Finite Element Analysis (FEA). The simulation results show that the proposed PMASRM can not only decrease the harmonic component of no-load back EMF obviously, but also reduce the torque ripple in steady-state operation, which proves the rationality of the motor structure.

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Design and analysis of a PM-assisted brushless WRSM for improving torque characteristics

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209429 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 1127-1134

Author(s):

Ghulam Jawad Sirewal ◽

Muhammad Ayub ◽

Byung-il Kwon

Keyword(s):

Finite Element ◽

Permanent Magnet ◽

Permanent Magnets ◽

Harmonic Component ◽

Torque Ripple ◽

Analysis Tool ◽

Element Analysis ◽

Third Harmonic ◽

Machine Structure ◽

Starting Torque

This paper proposes a permanent magnet assisted brushless wound rotor synchronous machine (PMa–BL–WRSM) design. The proposed machine has the advantage of a high starting torque compared to existing BL–WRSM topologies. Additionally, the average torque increases and the torque ripple is reduced when the permanent magnet assisted machine structure is used. PMa–BL–WRSM operates on the principle of brushless excitation using zero-sequence, third-harmonic current generation in the stator windings. The third harmonic component is harnessed to induce a voltage in the harmonic winding which is mounted on the rotor. As there is no flux generated from filed winding in the starting, the starting torque of the machine is also zero. To overcome the problem, permanent magnets (PMs) are inserted in each field tooth to provide the initial source of flux on the rotor. Finite element analysis is performed with the PM–BL–WRSM, and the elicited results are compared with the basic machine structure. The proposed machine operation is verified using 2-D finite element analyses using the ANSYS Maxwell analysis tool.

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Design and Analysis of a Dual Airgap Radial Flux Permanent Magnet Vernier Machine with Yokeless Rotor

Energies ◽

10.3390/en14082311 ◽

2021 ◽

Vol 14 (8) ◽

pp. 2311

Author(s):

Mudassir Raza Siddiqi ◽

Tanveer Yazdan ◽

Jun-Hyuk Im ◽

Muhammad Humza ◽

Jin Hur

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Permanent Magnet ◽

Flux Linkage ◽

Element Analysis ◽

Cogging Torque ◽

Torque Density ◽

Stator Windings ◽

Radial Flux ◽

Torque Ripples

This paper presents a novel topology of dual airgap radial flux permanent magnet vernier machine (PMVM) in order to obtain a higher torque per magnet volume and similar average torque compared to a conventional PMVM machine. The proposed machine contains two stators and a sandwiched yokeless rotor. The yokeless rotor helps to reduce the magnet volume by providing an effective flux linkage in the stator windings. This effective flux linkage improved the average torque of the proposed machine. The competitiveness of the proposed vernier machine was validated using 2D finite element analysis under the same machine volume as that of conventional vernier machine. Moreover, cogging torque, torque ripples, torque density, losses, and efficiency performances also favored the proposed topology.

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Time Resolution Dependency of Core Loss Accuracy in Finite Element Analysis of a Permanent Magnet Synchronous Machine

2020 International Conference on Electrical Machines (ICEM) ◽

10.1109/icem49940.2020.9271030 ◽

2020 ◽

Author(s):

Elisabet Jansson ◽

Torbjorn Thiringer ◽

Emma Grunditz

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Permanent Magnet ◽

Time Resolution ◽

Core Loss ◽

Synchronous Machine ◽

Permanent Magnet Synchronous Machine ◽

Element Analysis

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Design and Analysis of Dual Mover Multi-Tooth Permanent Magnet Flux Switching Machine for Ropeless Elevator Applications

Actuators ◽

10.3390/act10040081 ◽

2021 ◽

Vol 10 (4) ◽

pp. 81

Author(s):

Atif Zahid ◽

Faisal Khan ◽

Naseer Ahmad ◽

Irfan Sami ◽

Wasiq Ullah ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Permanent Magnet ◽

Iron Core ◽

Analytical Prediction ◽

Element Analysis ◽

Design Structure ◽

Finite Element Analysis Simulation ◽

Analysis Package ◽

Flux Switching Motor

A dual mover yokeless multi-tooth (DMYMT) permanent magnet flux switching motor (PM-FSM) design is presented in this article for ropeless elevator applications. The excitation sources, including a field winding and permanent magnet, are on the short mover in the proposed design structure, whereas the stator is a simple slotted iron core, thus reducing the vertical transportation system cost. The operational principle of the proposed DMYMT in PM-FSM is introduced. The proposed dual mover yokeless multi-tooth Permanent Magnet Flux Switching Motor is analyzed and compared for various performance parameters in a Finite Element Analysis package. The proposed machine has high thrust force and cost-effectiveness compared to conventional dual permanent magnet motor. Finally, this paper also develops an analytical model for the proposed structure, validated by comparing it with Finite Element Analysis simulation results. Results show good agreement between analytical prediction and Finite Element Analysis results.

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