scholarly journals Modular Rotor Single Phase Field Excited Flux Switching Machine with Non-Overlapped Windings

2018 ◽  
Author(s):  
Lutf Ur Rahman ◽  
Faisal Khan ◽  
Areej Fatima ◽  
Muhammad Afzal Khan ◽  
Naseer Ahmad ◽  
...  
Keyword(s):  
Phase Field ◽  
Single Phase ◽  
Optimization Technique ◽  
Stator Core ◽  
Element Analysis ◽  
Rotor Design ◽  
Iron Losses ◽  
Excitation Coil ◽  
Field Excitation ◽  
Copper Losses

In recent years, numerous topologies of single phase and three phase Field Excited Flux-Switching Machine (FEFSM) have been developed for several applications. Comparative study of three types of single-phase low-priced Field Excited Flux-Switching Machine (FEFSM) is presented in this paper. Both the conventional 8S/4P sub-part rotor design and 6S/3P salient rotor design have an overlapped winding arrangements between armature coil and field excitation coil that depicts high copper losses as well as  results in increased size of motor. Additionally, FEFSM with salient structure of the rotor have high flux strength in the stator-core that has much impact on high iron losses. Copper consumption and iron loss being a crucial proportion in total machine losses. Therefore a  novel topology of single phase modular rotor field excited FSM with 8S/6P configuration is proposed, which enable non-overlap arrangement between armature coil and FEC winding that facilitates devaluation in the copper losses. The proposed modular rotor design acquires reduced iron losses as well as reduced active rotor mass comparatively to conventional rotor design. It is very persuasive to analyze the best range of speed for these rotors to avoid cracks and deformation, the maximum tensile strength (can be measured with principal stress in research) of the rotor analysis is conducted using JMAG. A deterministic optimization technique is used to enhance the performance of 8S/6P modular rotor design. The electromagnetic performance of conventional sub-part rotor design, F1-A3-3P design and proposed novel-modular rotor design are analyzed by 3D-Finite Element Analysis (3D-FEA), includes flux linkage, flux distribution, flux strength, back-EMF, cogging torque, torque characteristics, iron losses and efficiency.

scholarly journals Modular Rotor Single Phase Field Excited Flux Switching Machine with Non-Overlapped Windings

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1576 ◽  
Author(s):  
Lutf Ur Rahman ◽  
Faisal Khan ◽  
Muhammad Afzal Khan ◽  
Naseer Ahmad ◽  
Hamid Ali Khan ◽  
...  
Keyword(s):  
Phase Field ◽  
Single Phase ◽  
Dead Zone ◽  
Optimization Technique ◽  
Rotor Design ◽  
Iron Losses ◽  
Excitation Coil ◽  
Electromagnetic Performance ◽  
Copper Losses ◽  
Single Phase Field

This paper aims to propose and compare three new structures of single-phase field excited flux switching machine for pedestal fan application. Conventional six-slot/three-pole salient rotor design has better performance in terms of torque, whilst also having a higher back-EMF and unbalanced electromagnetic forces. Due to the alignment position of the rotor pole with stator teeth, the salient rotor design could not generate torque (called dead zone torque). A new structure having sub-part rotor design has the capability to eliminate dead zone torque. Both the conventional eight-slot/four-pole sub-part rotor design and six-slot/three-pole salient rotor design have an overlapped winding arrangement between armature coil and field excitation coil that depicts high copper losses as well as results in increased size of motor. Additionally, a field excited flux switching machine with a salient structure of the rotor has high flux strength in the stator-core that has considerable impact on high iron losses. Therefore, a novel topology in terms of modular rotor of single-phase field excited flux switching machine with eight-slot/six-pole configuration is proposed, which enable non-overlap arrangement between armature coil and FEC winding that facilitates reduction in the copper losses. The proposed modular rotor design acquires reduced iron losses as well as reduced active rotor mass comparatively to conventional rotor design. It is very persuasive to analyze the range of speed for these rotors to avoid cracks and deformation, the maximum tensile strength (can be measured with principal stress in research) of the rotor analysis is conducted using JMAG. A deterministic optimization technique is implemented to enhance the electromagnetic performance of eight-slot/six-pole modular rotor design. The electromagnetic performance of the conventional sub-part rotor design, doubly salient rotor design, and proposed novel-modular rotor design is analyzed by 3D-finite element analysis (3D-FEA), including flux linkage, flux distribution, flux strength, back-EMF, cogging torque, torque characteristics, iron losses, and efficiency.

scholarly journals Optimization of Single Phase E-Core Hybrid Excitation Flux Switching Machine

2015 ◽  
Vol 773-774 ◽  
pp. 766-770
Author(s):  
Siti Nur Umira Zakaria ◽  
Erwan Sulaiman ◽  
Mohamed Mubin Aizat
Keyword(s):  
Single Phase ◽  
Phase System ◽  
Optimization Approach ◽  
Stator Core ◽  
Three Phase ◽  
Excitation Coil ◽  
Hybrid Excitation ◽  
Configuration Systems ◽  
Field Excitation ◽  
And Control

Research and development on hybrid excitation flux switching machines (HEFSM) for various applications have been carried out in the last years. The designed HEFSM consist of permanent magnet (PM) and DC field excitation coil (DC-FEC) which is located on the stator core as their main flux sources, while a single piece rotor gives the advantages of robust rotor structure. Since most of the designed HEFSMs utilize three-phase windings, more complicated design and control system are required to run the motor. Thus, a new design of single-phase E-Core HEFSM with several advantages of much simpler converter size and smaller battery package due to small voltage capacity when compared with conventional three-phase system is proposed. Consequently, the size of overall configuration systems will also be reduced resulting in reducing total weight and cost. In this paper, initial performances of 4S-4P, 4S-6P, 4S-8P and 4S-10P E-Core HEFSM topologies are analysed. Since 4S-10P design gives highest torque and power performances, deterministic design optimization approach is conducted to enhance much higher and optimum performances. As conclusion, the optimized E-core HEFSM with 4S-10P topology has achieved maximum torque and power of 208.857Nm and 47.31 kW, respectively.

New Topology of Single-Phase Segmented Rotor Field Excitation Flux Switching Machine for High Density Air-Condition

2014 ◽  
Vol 695 ◽  
pp. 783-786 ◽  
Author(s):  
Mohd Fairoz Omar ◽  
Erwan Sulaiman ◽  
Hassan Ali Soomro
Keyword(s):  
High Speed ◽  
Single Phase ◽  
High Density ◽  
Air Conditioner ◽  
Element Analysis ◽  
Power Characteristics ◽  
Copper Loss ◽  
Single Piece ◽  
Excitation Coil ◽  
Field Excitation

Various topologies of 3 phase and single phase Field Excitation Flux Switching Machines (FSMs) have been develop recently due to the advantages of veriable flux capability of DC Field Excitation coil located on the stator as well as robust single piece rotor structure suitable for high speed applications. However, the fundamantel principles of the develop machine with salient pole rotor, requires overlap winding between armature and FEC, creating the problems of high end coil, huge size of motor as well as high copper losses. Therefore, in this paper, a new topology of single phase segmented rotor FEFSM with 12S-6P configuration is presented with the advantage of non overlap armature and FEC windings, a smaller machine with low copper loss is designed. In this study, the principle of single phase 12S-6P with segmental is an investigated using 2D-FEA finite element analysis to validate the torque, speed and power characteristics. As conclusion, the proposed design is suitable for high density air-conditioner because 1kW power generated at 1.8Nm and the corresponding speed of 4977r/min.

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.

Preliminary studies of 12S-8P and 12S-14P Hybrid-Excited Flux Switching Machine with FEC in radial direction by using JMAG-designer software

2018 ◽  
Vol 7 (4.30) ◽  
pp. 479
Author(s):  
S. Khalidah Rahimi ◽  
Md. Zarafi Ahmad ◽  
Erwan Sulaiman ◽  
Syed M. Naufal Syed Othman ◽  
Hassan Ali Soomro
Keyword(s):  
Permanent Magnet ◽  
Radial Direction ◽  
High Efficiency ◽  
Synchronous Machines ◽  
Induced Voltage ◽  
Flux Linkage ◽  
Element Analysis ◽  
Excitation Coil ◽  
Field Excitation ◽  
Maximum Field

In this paper, design analysis of Hybrid- Excited Flux Switching Machine (H-EFSM) with 12Slot-8Pole (12S-8P) and 12Slot-14Pole (12S-14P) topologies are presented. H-EFSM  has  been introduced in which  the advantage  of  Permanent  Magnet  (PM)  machines  and  DC  Field Excitation Coil (FEC) synchronous machines is combined. H-EFSM  design proposed less permanent magnet consumption, high to torque/power density and high efficiency. In recent, most of H-EFSM having FEC arranged  in  theta  direction  that affect in flux production which cause less flux generation and machines performances.  Therefore, a design of 12S-8P and 12S-14P H-EFSM with FEC arranged in radial direction is proposed to prevent flux cancellation and produce high flux linkage. Performance analysis of 12S-8P and 12S-14 H-EFSM such as PM flux, induced voltage, cogging torque and flux distribution are investigated by 2-D Finite Element Analysis (2D-FEA). A design with 12S-14P configuration has achieved the higher torque and power with 220.15Nm and  92.45kW, respectively at maximum field and armature current density

Performance Analysis of 12Slot with Various Rotor Pole Numbers HE-FSM for HEV Application

2017 ◽  
Vol 8 (4) ◽  
pp. 1886
Author(s):  
Siti Khalidah Rahimi ◽  
Zarafi Ahmad ◽  
Erwan Sulaiman ◽  
Enwelum Mbadiwe I ◽  
Syed Muhammad Naufal Syed Othman
Keyword(s):  
Performance Analysis ◽  
Load Condition ◽  
Open Circuit ◽  
Induced Voltage ◽  
Element Analysis ◽  
Excitation Coil ◽  
Rotor Pole ◽  
Current Densities ◽  
Field Excitation ◽  
Open Circuit Condition

This paper presents performance analysis of 12Slot with various rotor pole numbers Hybrid Excitation Flux Switching Machine (HEFSM) for Hybrid Electric Vehicles (HEVs) application. HEFSM has carried out by combining the advantage of Permanent Magnet (PM) machines and DC Field Excitation Coil (FEC) synchronous machines. Previously, most of HEFSM structure having FEC windings in theta direction that create a problem of flux cancellation that will affect the performances of the machine.  Thus, a design of 12Slot HEFSM with FEC wounded in radial direction is proposed to eliminate the flux cancellation effect.  At first, armature coil arrangement test at no-load condition is conducted to analyze PM flux. Furthermore, induced voltage and cogging torque at open circuit condition are investigated based on 2D finite element analysis (FEA). Finally, torque and power performances are also examined at maximum FEC and armature current densities. The outcomes demonstrate that 12S-14P configuration has the highest PM flux linkage, torque, power and less distortion of back-emf waveform which are required to be used as a motor in HEVs. The highest torque and power achieved are 220.15Nm and 92.45kW, respectively.

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.

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).

Sign in / Sign up

Export Citation Format

Share Document