scholarly journals Optimal Stator Design of Doubly Salient Permanent Magnet Generator for Enhancing the Electromagnetic Performance

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3201
Author(s):  
Vannakone Lounthavong ◽  
Warat Sriwannarat ◽  
Apirat Siritaratiwat ◽  
Pirat Khunkitti
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Distribution ◽  
Voltage Regulation ◽  
Design Technique ◽  
Flux Linkage ◽  
Cogging Torque ◽  
Doubly Salient ◽  
Electromagnetic Performance ◽  
Stator Design

An optimal stator design technique of a three-phase doubly salient permanent magnet generator (DSPMG) for improving the output power is proposed. The stator configuration was optimally designed by adjusting the stator pole depth and stator pole arc. The trapezoid outer stator tip was also designed. Then, the output characteristics of the designed DSPMG including the flux linkage, electromotive force (EMF), harmonic, cogging torque, efficiency, magnetic flux distribution and voltage regulation were characterized by using the finite element method. Results were compared to the original structure in the literature. It was found that the flux linkage, EMF, cogging torque, and efficiency of the proposed DSPMG were significantly improved after the stator pole depth and stator pole arc were suitably modified. Further details of optimal stator pole depth and stator pole arc are presented. The EMF produced by the optimal proposed structure was 47% higher than that of the conventional structure, while 56% cogging torque improvement and 20% increased efficiency were achieved. The EMF generated by the proposed structure was classified in the high-range scale compared to the other existing models. The symmetrical magnetic flux distribution of all structures was indicated. The voltage regulation of the modified structure was also significantly improved from the conventional model. The proposed design technique can be utilized to maximize the electromagnetic performance of this particular generator type.

Magnetic Flux Analysis of E-Core Hybrid Excited FSM with Various Rotor-Pole Topologies

2014 ◽  
Vol 695 ◽  
pp. 774-777
Author(s):  
Siti Nur Umira Zakaria ◽  
Erwan Sulaiman
Keyword(s):  
Magnetic Flux ◽  
High Speed ◽  
Flux Distribution ◽  
Flux Analysis ◽  
Flux Linkage ◽  
Cogging Torque ◽  
Excitation Coil ◽  
Rotor Pole ◽  
Field Excitation ◽  
Flux Path

This paper presents magnetic flux analysis of E-Core Hybrid Excited FSM with various rotor pole topologies. The stator consists of three active fluxes sources namely armature coil, field excitation coil and permanent magnet, while the rotor consists of only stack of iron which is greatly reliable for high speed operation. Initially, coil arrangement tests are examined to validate the operating principle of the motor and to identify the zero rotor position. Then, performances of 6S-4P, 6S-5P, 6S-7P and 6S-8P E-Core HEFSMs such as flux path, flux linkage, cogging torque and flux distribution are observed. As conclusion, 6S-5P and 6S-7P designs have purely sinusoidal flux waveform and less cogging torque suitable for high torque and power motor.

Optimal Stator Design to Improve the Output Voltage of the Novel Three-Phase Doubly Salient Permanent Magnet Generator

2020 ◽  
Vol 8 (4) ◽  
pp. 118
Author(s):  
Vannakone Lounthavong ◽  
Warat Sriwannarat ◽  
Pattasad Seangwong ◽  
Apirat Siritaratiwat ◽  
Pirat Khunkitti
Keyword(s):  
Permanent Magnet ◽  
Output Voltage ◽  
The Novel ◽  
Three Phase ◽  
Doubly Salient ◽  
Stator Design ◽  
Permanent Magnet Generator

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

Energies ◽  
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.

scholarly journals An Improvement of Output Power in Doubly Salient Permanent Magnet Generator Using Pole Configuration Adjustment

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4588
Author(s):  
Warat Sriwannarat ◽  
Pattasad Seangwong ◽  
Vannakone Lounthavong ◽  
Sirote Khunkitti ◽  
Apirat Siritaratiwat ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
Output Voltage ◽  
Design Technique ◽  
Element Analysis ◽  
Split Ratio ◽  
Doubly Salient ◽  
Rotor Poles ◽  
Conventional Structure ◽  
Pole Configuration

The doubly salient permanent magnet (DSPM) machines are very attractive for low-speed power generation. In this work, we propose a design technique to improve the output power of the DSPM generator by an adjustment of pole configuration. The number of stator and rotor poles, split ratio, as well as the stator pole arc of the generator, were proposedly adjusted and optimized. The output characteristics of the generator including the magnetic flux linkage, electromotive force, harmonic, cogging torque, electromagnetic torque, output voltage and output power were analyzed through finite element analysis. The symmetrical magnetic field distribution of all generators was firstly verified. Then, the results indicated that this particular generator was optimized at 18 stator poles and 12 rotor poles, while the split ratio and the stator pole arc should be set as 0.78 and 6.15 degrees, respectively. The proposed optimal generator could provide a significant improvement in the output voltage and the output power compared to the conventional structure. The output power of 1.28 kW can be reached by the optimal structure, which was two times higher than that of the conventional structure. The physical explanation regarding to the structural modification was also given. The proposed design technique can be applied for improving the output power of the DSPM machines.

scholarly journals An Improvement of Magnetic Flux Linkage in Electrical Generator using the novel Permanent Magnet Arrangement

2018 ◽  
Vol 133 (3) ◽  
pp. 642-644 ◽  
Author(s):  
W. Sriwannarat ◽  
P. Khunkitti ◽  
A. Janon ◽  
A. Siritaratiwat
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
The Novel ◽  
Flux Linkage ◽  
Electrical Generator

scholarly journals Structural Design of Partitioned Stator Doubly Salient Permanent Magnet Generator for Power Output Improvement

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Warat Sriwannarat ◽  
Apirat Siritaratiwat ◽  
Pirat Khunkitti
Keyword(s):  
Permanent Magnet ◽  
Output Power ◽  
Power Output ◽  
High Reliability ◽  
Voltage Regulation ◽  
Air Gap ◽  
Doubly Salient ◽  
Pole Structure ◽  
Conventional Structure ◽  
Electrical Generation

Partitioned stator doubly salient permanent magnet generators (PS-DSPGs) have been extensively used for electrical generation mainly due to their high reliability, high electromotive force (EMF), and high-power output. Therefore, we aim to improve the output power of a PS-DSPG by designing the optimal configuration of generator pole structure. Electrical characteristics including the magnetic flux linkage distribution, phase EMF, cogging torque, voltage regulation, and power output profile were characterized by using the finite element method. After optimizing the generator pole structure including the angle of air gap arc width, it was found that the proposed PS-DSPG with 18/15 (stator/rotor) pole structure with optimized air gap arc width could produce higher EMF of about 23.24% than a conventional structure because this structure has the suitable number of pole structures. Also, an analysis of voltage regulation and power output profiles under the loaded condition were carried out, and it was indicated that the PS-DSPG based on the suitable 18/15-pole structure could provide the best machine performance where the output power is 11.63% higher than the conventional structure. Hence, the proposed PS-DSPG with 18/15-pole structure can appropriately be utilized for electrical generation, especially in low-speed operated generator applications.

Design and Modelling of a Portable Pico Linear Generator for Wave Energy Conversion System

2015 ◽  
Vol 785 ◽  
pp. 300-304
Author(s):  
Muhammad Faris Mohammad Naafi ◽  
Taib Ibrahim ◽  
Nursyarizal Mohd Noor ◽  
Muhammad Aizuddin Firdaus bin Mohamad Hamim
Keyword(s):  
Permanent Magnet ◽  
Wave Energy ◽  
Flux Distribution ◽  
Thrust Force ◽  
Wave Energy Conversion ◽  
Flux Linkage ◽  
Energy Converter ◽  
Linear Generator ◽  
Software Comparison ◽  
Energy Conversion System

This paper will focus on designing and modelling the portable pico linear generator for the wave energy converter application. The aim for this research is to develop a permanent magnet linear generator which has the weight less than 20 kg and can produce up to 80 W. A thorough literature review has been done on type of configurations, stator structure, magnetization and type of cored to select the best features of the linear generator. Three proposed designs of the permanent magnet linear generator is presented and each of the proposed design performance is simulated using the Ansys Maxwell software. Comparison on the preliminary result such as the air gap flux distribution, back-emf, flux linkage and thrust force of the three proposed designs will be shown and discussed.

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