scholarly journals Preliminary Design Analysis of a New Field Excitation Flux Switching Machine with Segmental Rotor and Non-overlap Winding

2018 ◽  
Vol 7 (2.23) ◽  
pp. 157
Author(s):  
M F. Omar ◽  
E Sulaiman ◽  
H A. Soomro ◽  
G M. Romalan ◽  
S M. N. S. Othaman
Keyword(s):  
Magnetic Flux ◽  
High Speed ◽  
Flux Linkage ◽  
Element Analysis ◽  
Test Analysis ◽  
Field Excitation ◽  
Low Torque ◽  
Flux Path ◽  
Rotor Structure ◽  
Segmental Rotor

Recently, a three-phase Field Excitation Flux Switching Motor (FEFSM) with salient rotor structure has been introduced with their advantages of easy rotor temperature elimination and controllable FEC magnetic flux particularly meet for high torque, high power as well as high speed diverse performances. Nevertheless, the salient rotor structure is found to lead a longer magnetic flux path between stator and rotor producing weak flux linkage along with low torque performances. Therefore, a new structure of a single-phase FEFSM using segmental rotor with non-overlap windings is proposed. Segmental rotor and non-overlap windings are the clear advantages of these topologies as the copper losses gets reduce and rotor becomes less weight as well as more robust. Detailed analysis on winding arrangement test analysis, armature and FEC flux linkage, back-EMF and average torque characteristics have been performed by using 2D Finite Element Analysis (FEA) through JMAG version 15 software. The results show that the proposed motor with segmental rotor and non-overlap windings produce short flux path, high flux linkage and the highest torque capability achieved is 0.91 Nm.  

scholarly journals Performance Comparison between Salient and Segmental Rotors Single-Phase FEFSM Using Non-Overlap Windings for Home Appliances

2018 ◽  
Vol 7 (4.30) ◽  
pp. 189
Author(s):  
M. F. Omar ◽  
E. Sulaiman ◽  
H. A. Soomro ◽  
L. I. Jusoh
Keyword(s):  
High Speed ◽  
Single Phase ◽  
Flux Line ◽  
Performance Comparison ◽  
Flux Linkage ◽  
Element Analysis ◽  
Copper Loss ◽  
Field Excitation ◽  
Low Torque ◽  
Rotor Structure

Field excitation flux switching machines (FEFSMs) in which their torque performance produced by interaction between armature and field excitation (FE) coils have been widely designed for various applications. In this regard, three-phase salient rotor FEFSM with overlap windings is considered the most suitable candidate for high speed applications because of their advantages of flux controllability, and robust due to single piece of rotor structure. However, the overlap windings cause a high copper loss, hence efficiency of the motor becomes low and higher stack length. Besides, the salient rotor structure is found to produce low torque performance due to the longer flux path in stator and rotor yielding weak flux linkage. In this paper, a new single-phase FEFSM using non-overlap windings between armature coils and FE coils is proposed. Both non-overlap windings FEFSMs with salient and segmental rotors have been designed using JMAG Designer version 15 and the investigation process is conducted via 2D finite element analysis. The proposed motor performances verification has been done by comparing the results of flux linkage, flux line and distribution, flux strengthening, various torque capability, and torque-power versus speed characteristics. As a conclusion, single-phase non-overlap windings FEFSM using segmental rotor with power, torque and speed capabilities of 277.5 W, 0.91 Nm and 2,899 rpm, respectively considered as the best candidate for low torque high speed applications.

scholarly journals Optimal design of single-phase 12S-6P FEFSM using segmental rotor and non-overlap windings

2019 ◽  
Vol 14 (2) ◽  
pp. 735
Author(s):  
Mohd Fairoz Omar ◽  
Erwan Sulaiman ◽  
Hassan Ali Soomro ◽  
Faisal Amin ◽  
Laili Iwani Jusoh ◽  
...  
Keyword(s):  
Output Power ◽  
High Speed ◽  
Single Phase ◽  
Flux Linkage ◽  
Copper Loss ◽  
High Torque ◽  
Field Excitation ◽  
Flux Path ◽  
Rotor Structure ◽  
Segmental Rotor

<span>Recently, a three-phase Field Excitation Flux Switching Motor (FEFSM) using salient rotor has been introduced, suitable for high torque, high power as well as high speed diverse performances due to their advantages of easy rotor temperature elimination and controllable field excitation (FE) flux. However, existing FEFSMs are found to have low torque performance as the salient rotor structure has caused longer flux path, and consequently weak flux linkage. Therefore, a new structure of a single-phase FEFSM using segmental rotor and non-overlap windings is proposed. There are two valuable findings found in this topology, first is less copper loss due to the non-overlap windings between armature and FE coils, and secondly the segmental rotor structure has produces shorter flux path to produce high torque, less rotor weight as well as robust rotor at high speed condition. Flux linkage, back-emf, average torque and output power characteristics of the initial and optimized designs have been investigated and compared using 2D Finite Element Analysis (2D-FEA) through JMAG Designer version 15. Based on the 2D-FEA analysis, the average torque has increased by 81.3% to 1.65 Nm, while the output power of 466.5 W, increased of 68.2%. In conclusions, a FEFSM using segmental rotor and non-overlap windings is considered as the best single-phase motor due to their optimal performances and less copper loss.</span>

scholarly journals Slot Pole Study of Field Excitation Flux Switching Machines Using Segmental Rotor and Non-Overlap Windings

2018 ◽  
Vol 7 (2.23) ◽  
pp. 459 ◽  
Author(s):  
M F. Omar ◽  
E Sulaiman ◽  
H A. Soomro ◽  
L I. Jusoh ◽  
F Amin
Keyword(s):  
High Speed ◽  
Flux Line ◽  
Flux Linkage ◽  
Element Analysis ◽  
Copper Loss ◽  
Single Piece ◽  
Field Excitation ◽  
Rotor Structure ◽  
Power Densities ◽  
Segmental Rotor

Field excitation flux switching machines (FEFSMs) in which their torque performance generated by interaction between armature and field excitation (FE) coils have been widely designed and developed for various applications. In this regard, FEFSM with salient rotor is considered the most suitable candidate for high speed applications because of their advantages of flux controllability, and robust due to single piece of rotor structure. However, the existing FEFSM with overlapped armature and FEC windings lead to increment of copper loss, motor size and material cost. In addition, the declination of torque and power densities due to high rotor weight needs to be improved. In this paper, performance comparisons of four FEFSM topologies particularly emphasis on non-overlap armature coil and FEC windings placed on the stator with segmental rotor are investigated. The performances, including flux linkage, back-emf, flux strengthening, flux line, flux distribution, cogging torque, torque and power of the proposed motor are analysed and compared using 2D finite element analysis (FEA) thru JMAG Designer version 15. As a result, segmental rotor has produced shorter flux paths, while non-overlapping windings has reduced the copper consumption. Finally, the best combination of stator slot-pole configurations is 12S-6P which provide high flux linkage, high torque and power of 0.0412 Wb, 0.77 Nm and 0.26 kW, respectively. 

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.

scholarly journals Comparative Performance of FE-FSM, PM-FSM and HE-FSM with Segmental Rotor

2015 ◽  
Vol 773-774 ◽  
pp. 776-780
Author(s):  
Hassan Ali Soomro ◽  
Erwan Sulaiman ◽  
Faisal Khan
Keyword(s):  
Induced Voltage ◽  
Element Analysis ◽  
Comparative Performance ◽  
Power Characteristics ◽  
Salient Pole ◽  
New Type ◽  
Field Excitation ◽  
Flux Path ◽  
Rotor Structure ◽  
Segmental Rotor

Flux switching machines (FSMs), new type of electric machines with unique operating principles have been introduced and published recently. FSMs contain armature and excitation sources on the stator with robust rotor structure. According to rotor structure FSMs can be classified into two types namely salient pole rotor and segmental pole rotor. Various topologies have been studied and published using both rotor structures, however salient pole rotor has a demerit of less torque generation due to longer flux path resulting flux leakage surrounding the rotor. In this paper a new structure of hybrid excitation FSM (HEFSM) with segmental rotor is proposed and a comparative analysis with the invented field excitation FSM (FEFSM) and permanent magnet FSM (PMFSM) is presented. Initially, coil arrangement tests are examined to confirm the operating principle of HEFSM with segmental rotor. Moreover, the cogging torque, induced voltage, magnetic flux, torque at various armature current densities and power characteristics are observed based on 2D-finite element analysis (FEA).

Improved Design of Three Phase Hybrid Excitation Flux Switching Motor with Segmental Rotor

2015 ◽  
Vol 785 ◽  
pp. 295-299
Author(s):  
Erwan Sulaiman ◽  
Hassan Ali ◽  
Mubin Aizat ◽  
Zhafir Aizat
Keyword(s):  
Induced Voltage ◽  
Element Analysis ◽  
Test Analysis ◽  
Excitation Coil ◽  
Hybrid Excitation ◽  
Field Excitation ◽  
Improved Design ◽  
Rotor Structure ◽  
Segmental Rotor ◽  
Flux Switching Motor

This paper presents the new design of Hybrid Excitation Flux Switching Motor (HEFSM) using segmental rotor structure. HEFSMs are those that consist all the excitation flux sources at their stator with robust rotor structure. The rotor is designed as segmental due to the reason that segmental rotor has ability to yield the magnetic path for conveying the field flux to nearby stator armature coil with respect to the rotation of the rotor. This design gives the clear advantage of shorter end winding compared to the toothed rotor as there is no overlap winding between field excitation coil (FEC) and armature coil. In this paper the initial design of HEFSM with segmental rotor has been improved by changing segment span, FEC slot area and armature slot area until maximum torque and power of 33.633 Nm and 8.17 KW respectively have been achieved. Moreover coil test analysis, induced voltage, cogging torque, magnetic flux characteristics, torque vs. field current density and torque vs. power speed characteristics are examined on the basis of 2-D finite element analysis (FEA).

Performance Comparison and Analysis of (HEFSM) and (FEFSM) Using Segmental Rotor Structure

2014 ◽  
Vol 695 ◽  
pp. 778-782 ◽  
Author(s):  
Hassan Ali Soomro ◽  
Erwan Sulaiman ◽  
Mohd Fairoz Omar
Keyword(s):  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Performance Comparison ◽  
Flux Linkage ◽  
Element Analysis ◽  
Cogging Torque ◽  
Hybrid Excitation ◽  
Current Densities ◽  
Rotor Structure ◽  
Segmental Rotor

This paper presents a new structure of hybrid excitation flux switching motor (HEFSM) using segmental rotor and the comparison of HEFSM and FEFSM using segmental rotor is performed to find the best candidate for hybrid electric vehicles (HEV). (HEFSM) using segmental rotor contains both the FEC and PM on the stator to produce maximum flux linkages. Initially, the coil arrangement tests are examined to validate the operating principle of the (HEFSM) using segmental rotor. Moreover the profile of flux linkage, cogging torque, and torque characteristics at various armature current densities of both the (HEFSM) and (FEFSM) using segmental rotor are observed based on 2D-finite element analysis (FEA). Initially performances show that HEFSM using segmental rotor produces torque of 18 Nm with low cogging torque and sinusoidal flux waveform. Thus by further design optimization the proposed motor will effectively achieve the target performances.

Design Studies and Analysis of Single Phase 8S-12P Field Excitation Flux Switching Motor

2014 ◽  
Vol 695 ◽  
pp. 601-604
Author(s):  
Zhafir Aizat Husin ◽  
Erwan Sulaiman ◽  
Faisal Khan ◽  
Mohamed Mubin Aizat Mazlan ◽  
Mohd Fairoz Omar
Keyword(s):  
High Speed ◽  
Single Phase ◽  
Induced Voltage ◽  
Flux Linkage ◽  
Element Analysis ◽  
Design Studies ◽  
Cogging Torque ◽  
Power Characteristics ◽  
Field Excitation ◽  
Flux Switching Motor

This paper presents a new structure of field excitation flux switching motor (FEFSM) as an alternative candidate of non-permanent magnet (PM) machine. The rotor is consisted of only stack of iron and hence, it is reliable and appropriate for high speed operation. Initially, the coil arrangement tests are examined to validate the operating principle of the motor and to identify the zero rotor position. Furthermore, the profile of flux linkage, induced voltage, cogging torque, torque and power characteristics are observed based on 2D finite element analysis (FEA). Initial performances show that 8S-12P FEFSM produce torque and power of 8.79Nm and 1.5kW, respectively with low cogging torque and sinusoidal flux waveform. Further design refinement and optimization will be conducted to improve the performances of the motor.

Finite-Element Analysis of the Magnetostatic Field of a Coaxial Magnetic Gear Device

2015 ◽  
Vol 764-765 ◽  
pp. 289-293
Author(s):  
Yi Chang Wu ◽  
Han Ting Hsu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnetic Flux ◽  
High Speed ◽  
Field Analysis ◽  
Element Analysis ◽  
Magnetostatic Field ◽  
Speed Reduction ◽  
Dimensional Finite Element ◽  
Magnetic Gear

This paper presents the magnetostatic field analysis of a coaxial magnetic gear device proposed by Atallah and Howe. The structural configuration and speed reduction ratio of this magnetic gear device are introduced. The 2-dimensional finite-element analysis (2-D FEA), conducted by applying commercial FEA software Ansoft/Maxwell, is performed to evaluate the magnetostatic field distribution, especially for the magnetic flux densities within the outer air-gap. Once the number of steel pole-pieces equals the sum of the pole-pair numbers of the high-speed rotor and the low-speed rotor, the coaxial magnetic gear device possesses higher magnetic flux densities, thereby generating greater transmitted torque.

Analysis and Design of High-Speed Flywheel on Satellite Energy Storage/Attitude Control System

2009 ◽  
Vol 610-613 ◽  
pp. 408-413
Author(s):  
Jian Yu Zhang ◽  
Yue Fu ◽  
Li Bin Zhao ◽  
Jian Cheng Fang
Keyword(s):  
Attitude Control ◽  
High Speed ◽  
Outer Radius ◽  
Design Parameters ◽  
Analysis Model ◽  
Attitude Control System ◽  
Element Analysis ◽  
Analysis And Design ◽  
Rotor Structure ◽  
Flywheel Rotor

Flywheel rotor structure is one of essential assemblies of the flywheel system used in IPACS. It is significant to ensure the safety of metallic hub and the composite rim under high centrifugal loading induced by the rotation field and the surface pressure produced by the interface misfits. In this paper a 3-D stress analysis model of the flywheel rotor is presented with the finite element analysis software ANSYS and the failure criteria of the materials are discussed to assess the structural strength. Moreover, the key design parameters are investigated briefly to disclose their influences on the stress distribution of rotor structure. At last, an optimum mathematics model with the outer radius of metallic hub, the thickness of each composite ring and the interface misfits as the design variables is presented. Based on the optimum design platform, the series of flywheel rotor structures can be designed systematically.

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