The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform

Erwan Sulaiman - One of the best experts on this subject based on the ideXlab platform.

  • three phase segmental rotor hybrid excitation flux switching motors for various applications
    Student Conference on Research and Development, 2015
    Co-Authors: Erwan Sulaiman, Mahyuzie Jenal, Mohd Fairoz Omar
    Abstract:

    Research and development on flux switching machines (FSM) for several applications have been carried out by the researchers in recent years. According to excitation source the FSMs are classified in three types' permanent magnet PM FSM, field excitation FE FSM and hybrid excitation HE FSM. In recent development of research has been with toothed rotor structures which exploits changes of paths for the stator teeth but this structure produces less torque and power due to longer flux cycles. Hence, the use of a segmental rotor structure has been developed, which gives significant gains. The primary function of the segments is to provide a defined magnetic path for conveying the flux to adjacent Armature Coil in stator as rotor rotates. Therefore in this paper new structure of hybrid excitation have been presented and the performances of initial HEFSM I, improved HEFSM II and enhanced HEFSM II has been analyzed on the basis of 2D FEA using JMAG ver.13 designer released by japan. As conclusion enhanced structure HEFSM III achieved better performances in terms of torque and power with smooth flux distribution over the stator.

  • Investigative study of a novel permanent magnet flux switching machine employing alternate circumferential and radial permanent magnet
    2015
    Co-Authors: Mahyuzie Jenal, Erwan Sulaiman
    Abstract:

    Flux switching machines (FSMs) which employing all flux sources in the stator body have been lately developed all over the world due to their undisputed advantage of single piece robust rotor structure suitable for high speed applications. Furthermore, they can be broken down into three clusters namely permanent magnet (PM) FSM, field excitation (FE) FSM, and hybrid excitation (HE) FSM. Both PMFSM and FEFSM has only permanent magnet (PM) and field excitation Coil (FEC), respectively as their main flux sources, while HEFSM unites both PM and FECs. Among these, PMFSM presents benefits of low cost, simple construction and FEC-free winding that gains low copper losses- suitable for various performances. In this paper, design study and investigative analysis of a new alternate circumferential and radial magnetization flux (AlCiRaf) of 12S-10P PMFSM with salient rotor (SalR) is presented. The proposed design is then compared to the conventional PMFSM and segmental rotor PMFSM (SegR PMFSM). Initially, design procedures of the AlCiRaF PMFSM including topology development, materials and conditions setting and properties setting are described. Subsequently, Coil arrangement tests are examined to validate machine operating principle and position of each Armature Coil phase. Moreover, the flux interaction between PM and Armature Coil, induced voltage, cogging torque at various rotor position, initial output power and torque performances are also investigated using 2D-FEA . The simulated result shows that the proposed AlCiRaF PMFSM achieves its highest output power performances of 8.1kW at maximum Ja=30Arms/mm2 significantly 15.2% higher than that of conventional PMFSM and 12.9% better than SegR PMFSM in terms of initial output torque.

  • Comparative study on a new permanent magnet flux switching machine configuration over segmental and salient rotor structure
    2015
    Co-Authors: Mahyuzie Jenal, Erwan Sulaiman
    Abstract:

    In this paper, an investigation of a new structure of alternate circumferential and radial magnetization permanent magnet flux (AlCiRaF) permanent magnet flux switching machine (PMFSM) with different rotor configurations namely segmental rotor (SegR) and salient rotor (SalR) is presented. The proposed designs are briefly compared in regards to topology development, materials and conditions setting as well as properties setting. Consequently, Coil arrangement tests are carried out to legalize the machine operating principle including position of each Armature Coil phase. Furthermore, the flux interaction between PM and Armature Coil, back emf, cogging torque at various rotor position, initial output power and torque performances are also investigated using 2D finite-element analysis (2D-FEA). The simulated result shows that the proposed 12S-10P AlCiRaF PMFSM with SalR rotor attains its highest output torque performances of 25.5 Nm at maximum Ja of 30Arms/mm2 significantly over 60% greater than that of 12S-8P AlCiRaF PMFSM with SegR configuration.

  • Improved Design of Three Phase Hybrid Excitation Flux Switching Motor with Segmental Rotor
    Applied Mechanics and Materials, 2015
    Co-Authors: Erwan Sulaiman, Mazlan, Mohamed Mubin Aizat, Hassan Ali, Zhafir Aizat
    Abstract:

    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).

  • Initial design of 12S-10P outer-rotor field excitation flux switching motor with different rotor width
    2015
    Co-Authors: Syed Muhammad Naufal Syed Othman, Erwan Sulaiman, Faisal Khan, Zhafir Aizat Husin, Mohamed Mubin Aizat Mazlan
    Abstract:

    This paper proposes an initial design of 12 slot, 10 pole outer-rotor field-excitation flux switching motor (FEFSM) with two different rotor width based from 2 different formula to design the rotor width. Hence, initial design include the three Coil test to determine the U, W, V-phase, the flux strengthening and weakening, flux at various Armature Coil and field-excitation Coil current, and finally the torque at various JA and JE. As for the materials, the stator and rotor consists of steel sheets made of electromagnetic steels, copper for Armature Coils and field excitation Coils as the only field for magnetic flux source. There will be some design specification and restriction on outer-rotor FEFSM based on 2D-Finite Element Analysis will be applied to design the proposed machine.

Takashi Kosaka - One of the best experts on this subject based on the ideXlab platform.

  • design study of single phase outer rotor hybrid excitation flux switching motor for hybrid electric vehicles
    IEEE International Power Engineering and Optimization Conference, 2014
    Co-Authors: Mubin Aizat Mazlan, Erwan Sulaiman, Takashi Kosaka
    Abstract:

    In electric machine, there are several types that are practical for EVs. However, most of commercial EV including these types of motors used single motor and transmission gears coupled to the wheels. This system leads to the transmission losses and reduce the efficiency and reliability of the motor. Therefore, in-wheel direct drive mechanism is introduced to overcome this problem. In-wheel direct drive eliminates the mechanical transmission, differential gears and drive belts. Thus, in-wheel direct drive provides quick torque response, higher efficiency, weight reduction, and increased vehicle space. As one of alternative, a new design of hybrid excitation flux switching motor (ORHEFSM) for in-wheel drive EV is proposed. In this paper, the design optimization of single-phase 8S-4P outer-rotor HEFSM is presented. Initially, design procedures of the HEFSM including parts drawing, materials and conditions setting, and properties setting are explained. Then, Coil arrangement tests are examined to confirm the machine operating principle and position of each Armature Coil phase. Finally, flux comparison of PM, DC FEC and PM with DC FEC, flux linkage at various FEC current densities, J E , flux distribution and flux line of PM with FEC, cogging torque, Induced voltage/ back EMF of PM, DC FEC and PM with DC FEC, Combination of FEC and Armature Coil Flux Characteristic (FEC + Armature Coil), and torque and power versus FEC current density, J E at various Armature Coil current densities, J A are also analyzed. As a result, the performance of the improved design motor shows that the maximum torque achieved is 96.8% of the target performance, whereas the maximum power has achieved 56.3 kW which is greater than the target value. Thus, by further design refinement and optimization it is expected that the motor will successfully achieve the target performances.

  • performance comparison of 24s 10p and 24s 14p field excitation flux switching machine with single dc Coil polarity
    IEEE International Power Engineering and Optimization Conference, 2013
    Co-Authors: Erwan Sulaiman, M Z Ahmad, M F M Teridi, Zhafir Aizat Husin, Takashi Kosaka
    Abstract:

    Flux switching machines (FSMs) that consist of all flux sources in the stator have been developed in recent years due to their advantages of single piece and robust rotor structure suitable for various speed applications. They can be categorized into three groups that are permanent magnet (PM) FSM, field excitation (FE) FSM, and hybrid excitation (HE) FSM. Both PMFSM and FEFSM has only PM and field excitation Coil (FEC), respectively as their main flux sources, while HEFSM combines both PM and FECs. Among these FSMs, the FEFSM offers advantages of low cost, simple construction and variable flux control capabilities suitable for various performances. In this paper, design study and flux interaction analysis of a new 12S10P and 12S-14P FEFSM with single direction of DC FEC winding are presented. Initially, design procedures of the FEFSM including parts drawing, materials and conditions setting, and properties setting are explained. Then, Coil arrangement tests are examined to confirm the machine operating principle and position of each Armature Coil phase. Finally, flux interaction between DC FEC and Armature Coil, FEC flux capabilities at various current condition, induced voltage and initial torque are also analyzed.

  • Investigation on Flux Characteristics of Field Excitation Flux Switching Machine with Single FEC Polarity
    Procedia Technology, 2013
    Co-Authors: Erwan Sulaiman, M Z Ahmad, M F M Teridi, Zhafir Aizat Husin, Takashi Kosaka
    Abstract:

    Flux switching machines (FSMs) that consist of all flux sources in the stator have been developed in recent years due to their definite advantage of single piece robust rotor structure suitable for high speed applications. They can be categorized into three groups that are permanent magnet (PM) FSM, field excitation (FE) FSM, and hybrid excitation (HE) FSM. Both PMFSM and FEFSM has only PM and field excitation Coil (FEC), respectively as their main flux sources, while HEFSM combines both PM and FECs. Among these FSMs, the FEFSM offers advantages of low cost, simple construction and variable flux control capabilities suitable for various performances. In this paper, design study and flux interaction analysis of 24S-10P FEFSM with single direction of FEC winding is presented. Initially, design procedures of the FEFSM including parts drawing, materials and conditions setting, and properties setting are explained. Then, Coil arrangement tests are examined to confirm the machine operating principle and position of each Armature Coil phase. Finally, the flux interaction between DC FEC and Armature Coil, FEC flux capabilities at various current condition, and initial torque are also investigated.

  • impact of rotor pole number on the characteristics of outer rotor hybrid excitation flux switching motor for in wheel drive ev
    Procedia Technology, 2013
    Co-Authors: M Z Ahmad, Erwan Sulaiman, Zainal Alam Haron, Takashi Kosaka
    Abstract:

    This paper present the impact of rotor pole number on the characteristics of outer-rotor hybrid excitation flux switching motor (ORHEFSM) for in-wheel drive electric vehicle (EV) applications. In recent years, researches on in-wheel motor for EV drivetrain system become more popular due to their several advantages of independent wheel controllability and higher efficiency. In addition, it provides more cabin space caused by elimination of mechanical transmission gears as conventionally use in the most of existing EV with single motor propulsion system configuration. Moreover, the proposed motor has single piece of rotor making the motor more robust and suitable for high speed applications. Under some design restrictions and specifications, design principles and initial performances of the proposed motor at various rotor pole numbers with 12 stator slots are demonstrated. Initially, the Coil arrangement tests are examined to confirm the operating principle and polarity of each Armature Coil phase of the proposed motor. Furthermore, the profile of flux linkage, induced voltage, cogging torque and torque characteristics at various field excitation current density conditions are analyzed based on 2D- finite element analysis (FEA). The results obtained show that the appropriate combination of stator slot-rotor pole configurations are 12S-10P which initially provide highest torque and power density. Thus, by further design refinement and optimization it is expected that the motor will successfully achieved the target performances.

  • A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles
    Proceedings of the 2011 14th European Conference on Power Electronics and Applications, 2011
    Co-Authors: Erwan Sulaiman, Takashi Kosaka, Nobuyuki Matsui
    Abstract:

    This paper presents a new structure of 12Slot-10Pole field-excitation flux switching synchronous machine (FEFSSM) with all active parts namely field excitation Coil (FEC) and Armature Coil are located on the stator, applied for hybrid electric vehicles (HEVs). The rotor part consists of single piece iron makes it more robust and becoming more suitable to apply for high speed motor drive system application coupled with reduction gear. The design target is the motor with a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20, 000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization approach is used to treat design parameters defined in rotor, Armature and FEC repeatedly until the target performances are achieved, under maximum current density 21A/mm2 for both Armature and FEC. A result shows that the proposed design enables to keep the same power density in existing IPMSM installed on a commercial SUV-HEV.

Faisal Khan - One of the best experts on this subject based on the ideXlab platform.

  • Modular Rotor Single Phase Field Excited Flux Switching Machine with Non-Overlapped Windings
    MDPI AG, 2019
    Co-Authors: Lutf Ur Rahman, Faisal Khan, Muhammad Afzal Khan, Naseer Ahmad, Hamid Ali Khan, Mohsin Shahzad, Siddique Ali, Hazrat Ali
    Abstract:

    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

  • Novel Modular Rotor Single Phase Wound Field Flux Switching Machine
    2018 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET), 2018
    Co-Authors: Lutf Ur Rahman, Faisal Khan, Areej Fatima, Muhammad Afzal Khan
    Abstract:

    In recent years, numerous topologies of single phase and three phase Field Excited Flux-Switching Machine (FEFSM) have been developed for several application such as flux weakening capability and high speed because of robust structure of rotor. However, conventional 8S-4P sub-part rotor design has higher iron losses in stator and rotor core. Overlapped winding configuration between Field Excitation Coil (FEC) and Armature Coil of conventional design has a problem of high copper consumption. This paper presents novel topology of single phase modular rotor field excited FSM with 8s-6p configuration, which enable non-overlap arrangement between Armature Coil and FEC winding that facilitates devaluation in the copper losses. The proposed rotor design acquires reduced iron losses comparatively to conventional design. The electromagnetic performance of conventional sub-part rotor design and proposed novel-modular rotor design is analyzed by 3D-Finite Element Analysis (3D-FEA), includes flux linkage, flux strength, back-EMF, cogging torque, torque characteristics and iron losses.

  • Initial design of 12S-10P outer-rotor field excitation flux switching motor with different rotor width
    2015
    Co-Authors: Syed Muhammad Naufal Syed Othman, Erwan Sulaiman, Faisal Khan, Zhafir Aizat Husin, Mohamed Mubin Aizat Mazlan
    Abstract:

    This paper proposes an initial design of 12 slot, 10 pole outer-rotor field-excitation flux switching motor (FEFSM) with two different rotor width based from 2 different formula to design the rotor width. Hence, initial design include the three Coil test to determine the U, W, V-phase, the flux strengthening and weakening, flux at various Armature Coil and field-excitation Coil current, and finally the torque at various JA and JE. As for the materials, the stator and rotor consists of steel sheets made of electromagnetic steels, copper for Armature Coils and field excitation Coils as the only field for magnetic flux source. There will be some design specification and restriction on outer-rotor FEFSM based on 2D-Finite Element Analysis will be applied to design the proposed machine.

  • electromagnetic flux analysis on a new outer rotor hybrid excitation flux switching machine
    Asia-Pacific Conference on Applied Electromagnetics, 2014
    Co-Authors: M Z Ahmad, Erwan Sulaiman, Faisal Khan, Zainal Alam Haron
    Abstract:

    This paper presents an analysis of electromagnetic flux capability on a new 12Slot-14Pole outer-rotor hybrid excitation flux switching machine (ORHEFSM). In this proposed machine, all the magnetic flux sources are placed on the stator resulting for robust machine and suitable for high speed application. Moreover, Coil test analysis, permanent magnet (PM) and DC field excitation Coil (FEC) flux characteristic, flux interaction between DC FEC and Armature Coil, flux distribution, and torque characteristics are also investigated. The results show that the torque performance of the proposed machine is proportional to the change of flux linkage. Therefore, a flux control capability of the machine gives additional advantage for variable speed condition application.

  • Preliminary Design of Field Excitation Flux Switching Motor on the Impact of Various Rotor Pole Number for Hybrid Electric Vehicles
    2014
    Co-Authors: Zhafir Aizat Husin, Erwan Sulaiman, Faisal Khan, Mohd Fairoz Omar
    Abstract:

    This paper presents a new structure of field excitation flux switching motor (FEFSM) as an alternative candidate of non-permanent magnet (PM) machine for hybrid electric vehicles (HEVs) drives. The effect and performances of rotor pole number with similar Armature Coil slot configurations on the stator of the proposed FEFSM is analyzed for HEV applications. The stator of projected machine consists of iron core made of electromagnetic steels, Armature Coils and field excitation Coils as the only field mmf source. The rotor is consisted of only stack of iron and hence, it is reliable and appropriate for high speed operation. Under some design restrictions and specifications, design principles and initial performances of the proposed motor at various rotor pole numbers with 8 stator slots are demonstrated. 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 and torque characteristics are observed based on 2D finite element analysis (FEA). The results obtained show that the appropriate combination of stator slot-rotor pole configurations are 8S-12P and 8S-4P with lowest cogging torque as well as sinusoidal flux waveforms and 8S-8P with highest average torque and power, respectively. Thus, by further design modification and optimization, it is expected that the motor will successfully achieved the target performances for HEV application.

Sulaiman Erwan - One of the best experts on this subject based on the ideXlab platform.

  • Performance Analysis of 12Slot with Various Rotor Pole Numbers HE-FSM for HEV Application
    Institute of Advanced Engineering and Science, 2017
    Co-Authors: Rahimi, Siti Khalidah, Sulaiman Erwan, Ahmad Zarafi, Mbadiwe I Enwelum, Othman, Syed Muhammad Naufal Syed
    Abstract:

    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 and Performance of 8Slot-12Pole Permanent Magnet Flux Switching Machines for Electric Bicycle Application
    Institute of Advanced Engineering and Science, 2017
    Co-Authors: Jusoh, Laili Iwani, Sulaiman Erwan, Kumar Rajesh, Bahrim, Fatihah Shafiqah
    Abstract:

    This paper presents a new design and performance of single phase permanent magnet flux-switching machine (PMFSM) for electric bicycle application. 8Slot-12Pole design machine were choose by analyzing the highest power density value. All active parts such as permanent magnet and Armature Coil are located on the stator, while the rotor part consists of only single piece iron. PMFSM have a great advantage with robust rotor structure that make it much higher power and applicable for EV application compared to SRM and IPMSM. The design, operating principles, characteristics of torque, and power of this new topology are investigated by JMAG-Designer via a 2D-FEA. Size of motor and volume of PM is designed at 75mm and 80g, respectively. Based on the investigation, it can be concluded that the proposed topology of single phase 8Slot 12Pole PMFSM achieved the target of highest performance of power density, approximately at 0.113W/mm3 with reduced permanent magnet and size of design motor. Due to the low torque performance of this initial design, further works is ongoing to improve the torque performance. In future work, outer rotor PMFSM structure design will be presented and compared with the “Deterministic Optimization Method” to improve the initial design

  • Design and characteristic investigations of 12slot-8pole and 12slot-10pole wound field three-phase switched-flux machines
    2015
    Co-Authors: Khan Faisal, Sulaiman Erwan, Omar M. F.
    Abstract:

    In this paper, a new wound field salient rotor (WFSalR) switched-flux machine (SFM) with 12 stator poles and 10 rotor poles is designed, investigated, and compared with the same stator but 8 rotor poles WFSalR SFM. The main advantage of these SFMs when compared with induction machines, direct current (DC) machines etc is that, all the active parts such that Armature Coil and field excitation Coil (FEC) are located on the stator while the rotor part consists of only single piece iron. This makes the machine more robust, simple structure and more suitable to be used for high speed applications. Concentrated windings at the stator reduce the copper consumption and also the copper losses. Initially, the general construction of WFSalR SFMs and design specifications are outlined. Then, finite element analysis (FEA) is used to investigate and compare the flux linkage, induced emf, cogging torque, average torque and torque speed characteristics of proposed WFSalR SFM

  • Improved design of three phase hybrid excitation flux switching motor (HEFSM) with segmental rotor
    2015
    Co-Authors: Sulaiman Erwan, Ali Hassan, Aizat Mubin, Aizat Zhafir
    Abstract:

    This paper presents the new design of Hybrid Excitation Flux Switching Motor (HEFSM) using segmental rotor structure. HEFSMs are those that consists 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

  • Design study of single phaseinner-rotor hybrid excitation flux switching motor for hybrid electric vehicles
    2014
    Co-Authors: Mazlan, Mohamed Mubin Aizat, Husin Zhafir Aizat, Syed Othman Syed Muhammad Naufal, Sulaiman Erwan
    Abstract:

    In hybrid excitation machines (HEMs), there are two main flux sources which are permanent magnet (PM) and field excitation Coil (FEC). These HEMs have better features when compared with interior permanent magnet synchronous machines (IPMSM) used in conventional hybrid electric vehicles (HEVs). Since all flux sources including PM, FEC and Armature Coils are located on stator core, the rotor becomes a single piece structure similar with switch reluctance machine (SRM). The combined flux generated by PM and FEC established more excitation fluxes that are required to produce much higher torque of the motor. In addition, variable DC FEC can control the flux capabilities of the motor, thus the machine can be applied for high-speed motor drive system.In this paper, the initial design of single-phase 8S-4P inner-rotor HEFSM is presented. InitiallyCoil arrangement tests are examined to confirm the machine operating principle and position of each Armature Coil phase. Finally, flux comparison of PM, DC FEC and PM with DC FEC, flux linkage at various FEC current densities, JE, flux distribution and flux line of PM with FEC, cogging torque, induced voltage/ back EMF of PM, DC FEC and PM with DC FEC, combination of FEC and Armature Coil flux characteristic and torque and power versus FEC current density, JE at various Armature Coil current densities, JA are also analyzed. As a result, the performance of the initial design motor shows that the maximum torque achieved is 81.6% of the target performance, whereas the maximum power achieved 47.4 kW, 15.6% is greater than the target value. Thus, by further design refinement and optimization it is expected that the motor will successfully achieve the target performances

Mahyuzie Jenal - One of the best experts on this subject based on the ideXlab platform.

  • three phase segmental rotor hybrid excitation flux switching motors for various applications
    Student Conference on Research and Development, 2015
    Co-Authors: Erwan Sulaiman, Mahyuzie Jenal, Mohd Fairoz Omar
    Abstract:

    Research and development on flux switching machines (FSM) for several applications have been carried out by the researchers in recent years. According to excitation source the FSMs are classified in three types' permanent magnet PM FSM, field excitation FE FSM and hybrid excitation HE FSM. In recent development of research has been with toothed rotor structures which exploits changes of paths for the stator teeth but this structure produces less torque and power due to longer flux cycles. Hence, the use of a segmental rotor structure has been developed, which gives significant gains. The primary function of the segments is to provide a defined magnetic path for conveying the flux to adjacent Armature Coil in stator as rotor rotates. Therefore in this paper new structure of hybrid excitation have been presented and the performances of initial HEFSM I, improved HEFSM II and enhanced HEFSM II has been analyzed on the basis of 2D FEA using JMAG ver.13 designer released by japan. As conclusion enhanced structure HEFSM III achieved better performances in terms of torque and power with smooth flux distribution over the stator.

  • Comparative study on a new permanent magnet flux switching machine configuration over segmental and salient rotor structure
    2015
    Co-Authors: Mahyuzie Jenal, Erwan Sulaiman
    Abstract:

    In this paper, an investigation of a new structure of alternate circumferential and radial magnetization permanent magnet flux (AlCiRaF) permanent magnet flux switching machine (PMFSM) with different rotor configurations namely segmental rotor (SegR) and salient rotor (SalR) is presented. The proposed designs are briefly compared in regards to topology development, materials and conditions setting as well as properties setting. Consequently, Coil arrangement tests are carried out to legalize the machine operating principle including position of each Armature Coil phase. Furthermore, the flux interaction between PM and Armature Coil, back emf, cogging torque at various rotor position, initial output power and torque performances are also investigated using 2D finite-element analysis (2D-FEA). The simulated result shows that the proposed 12S-10P AlCiRaF PMFSM with SalR rotor attains its highest output torque performances of 25.5 Nm at maximum Ja of 30Arms/mm2 significantly over 60% greater than that of 12S-8P AlCiRaF PMFSM with SegR configuration.

  • Investigative study of a novel permanent magnet flux switching machine employing alternate circumferential and radial permanent magnet
    2015
    Co-Authors: Mahyuzie Jenal, Erwan Sulaiman
    Abstract:

    Flux switching machines (FSMs) which employing all flux sources in the stator body have been lately developed all over the world due to their undisputed advantage of single piece robust rotor structure suitable for high speed applications. Furthermore, they can be broken down into three clusters namely permanent magnet (PM) FSM, field excitation (FE) FSM, and hybrid excitation (HE) FSM. Both PMFSM and FEFSM has only permanent magnet (PM) and field excitation Coil (FEC), respectively as their main flux sources, while HEFSM unites both PM and FECs. Among these, PMFSM presents benefits of low cost, simple construction and FEC-free winding that gains low copper losses- suitable for various performances. In this paper, design study and investigative analysis of a new alternate circumferential and radial magnetization flux (AlCiRaf) of 12S-10P PMFSM with salient rotor (SalR) is presented. The proposed design is then compared to the conventional PMFSM and segmental rotor PMFSM (SegR PMFSM). Initially, design procedures of the AlCiRaF PMFSM including topology development, materials and conditions setting and properties setting are described. Subsequently, Coil arrangement tests are examined to validate machine operating principle and position of each Armature Coil phase. Moreover, the flux interaction between PM and Armature Coil, induced voltage, cogging torque at various rotor position, initial output power and torque performances are also investigated using 2D-FEA . The simulated result shows that the proposed AlCiRaF PMFSM achieves its highest output power performances of 8.1kW at maximum Ja=30Arms/mm2 significantly 15.2% higher than that of conventional PMFSM and 12.9% better than SegR PMFSM in terms of initial output torque.

  • Comparison of Three Phase and Single Phase FE-FSM with Segmental Rotor
    2014
    Co-Authors: Hassan Ali Soomro, Erwan Sulaiman, Muhammad Fairoz Omer, Mahyuzie Jenal
    Abstract:

    A new machine Switching Flux machine (SFM) has been highlighted during recent research, having all the active parts on the stator with robust structure of rotor. SFM has three major types with respect to their excitation source. Permanent Magnet Switching Flux Motor (PM-SFM) Field Excitation Switching Flux Motor (FE-SFM) and Hybrid Excitation Switching Flux Motor (HE-SFM). PM and FE Coil are the main sources of flux generation in the stator of (PM-SFM) and (FE-SFM) respectively. While in HE-SFM both PM and FE Coil are combined to produce flux linkage in the Armature Coil. This paper presents the comparison between single phase FE-SFM and three phase FE-SFM with segmental rotor. By the use of segmental rotor flux is switched in the Armature circuit as rotor rotates. Initially, the Coil arrangement tests are examined to confirm the operating principle of the motor. Furthermore, the profile of flux linkage, induced voltage, cogging torque, flux strengthening, and torque characteristics at various Armature current densities are observed based on 2D- finite element analysis (FEA).

  • investigation of field excitation switched flux motor with segmental rotor
    2013 IEEE Conference on Clean Energy and Technology (CEAT), 2013
    Co-Authors: Erwan Sulaiman, Mahyuzie Jenal, Faisal Khan, M Z Ahmad, Shamsul Aizam Zulkifli, A A Bakar
    Abstract:

    In this paper a three-phase field excitation switched flux (FESF) motor where both Armature Coil and field excitation (FE) Coil placed on the stator is investigated. The rotor is design with separately segmental pole so that flux generated from FE Coil can be fundamentally placed in adjacent with flux of Armature Coil. Thus, the Coil end length of both FE Coil and Armature Coil are reduced, hence increasing the motor efficiency when compared with FESF motor with single piece rotor, and overlapped FE Coil and Armature Coil windings. In this paper design investigation and analysis of 12S-8P and 24S-10P FESF motor with segmental rotor are investigated. Moreover, Coil test analysis, FE Coil flux characteristics, flux interaction between FE Coil and Armature Coil, flux distribution, and torque characteristics are also compared. As conclusion, the 24S-10P FESF motor with segmental rotor gives much higher performance when compared with 12S-8P FESF motor.