Output power improvement of a vernier motor using field winding configuration

In this paper, a field winding vernier (FWV) machine is proposed to get higher back electromotive force (EMF) than surface permanent magnet vernier (SPMV) machine. First, the magneto motive force (MMF) equation of FWV machine is derived to obtain the requisite field current to produce the same back EMF as SPMV machine. Using the derived equation, the surface current density is also estimated and compared with the maximum allowable current density to examine the possibility of improving the back EMF of the FWV machine and find the slot-pole combination that is advantageous for the FWV structure. Using the obtained information, three models of SPMV and FWV machines are designed, finite element analysis are performed, and it is verified that proposed FWV machine has the capability of producing higher back EMF than SPMV machine.

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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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