Permanent-Magnet Flux-Switching Synchronous Motor Employing a Segmental Rotor

Zulu, Ackim; Mecrow, B.C.; Armstrong, Matthew

doi:10.1109/tia.2012.2226922

Cited by 69 publications

(45 citation statements)

References 26 publications

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“…Already, some segmented rotor geometries have been considered as illustrated in figure 5. The shape in (a) shows an earliest circumferential extending pole applied in inner rotor synchronous reluctance machine [26]. Though circumferential extending pole is ideal in terms of performance in inner rotor configuration, it needs notable modifications for in-wheel/outer rotor application.…”

Section: Design Motor Parameters/rotor Segmentmentioning

confidence: 99%

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

Mbadiwe

Sulaiman

Zarafi

2018

MATEC Web of Conferences

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Abstract. Electric scooters also known as electric motorcycle are viable and personal means of road transportation have been making their ways into the world markets now because in them, combustion engine with the use of fuel oil for propulsion have been completely eliminated for economic and environmental imperatives. Electric motor which converts electrical energy into mechanical energy is used to overcome the complication of combustion engine. As it is, everyone is opting for combustion engine free and fuel-less type of vehicle. For this reason, manufacturers have exhibited interest, making research on electric motor very attractive. Meanwhile, surface permanent magnet synchronous motor (SPMSM) has been successfully developed having output torque of 110 Nm, the assembly of motor lacked mechanical strength between the rotor yoke and the mounted permanent magnet (PM) which heats up during speed operation, resulting to poor performance. To overcome the challenges laced with SPMSM, this paper presents a novel design of 24 stator 14 pole outer rotor-permanent magnet flux switching motor (SOR-PMFSM) capable of high torque and high performance. It employs an unconventional segmented rotor which has short flux path flow. It also embraces alternate stator tooth windings to reduce material cost. Design specifications and restriction with input DC current are the same with SPMSM. The 2D-FEA by JMAG, version 14 is used to examine the performance of the proposed motor in terms of cogging torque, back-emf, average torque, power and efficiency. Preliminary results showed that torque, power output and efficiency of the proposed motor are 1.9Nm times, 5.8kW times more than SPMSM and efficiency of 84% thus, can sustain acceleration for long distance travel.

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Section: Design Motor Parameters/rotor Segmentmentioning

confidence: 99%

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

Mbadiwe

Sulaiman

Zarafi

2018

MATEC Web of Conferences

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“…Moreover, the middle E-stator teeth can be removed to enlarge the slot area and consequently the new C-core PMSFM is introduced [16]. Another class of PMSFM applying segmental rotor has been published in [17] but its rotor structure has cause doubtful and nonrobust operation while rotating at high speed. On top of these topologies, the main constraints are magnetic flux leakage at the utmost tips of PM which limits the distribution of flux and also their separated stator from one segment to another that is hardly to manufacture and assemble.…”

Section: Introductionmentioning

confidence: 99%

A New Switched Flux Machine Employing Alternate Circumferential and Radial Flux (AlCiRaF) Permanent Magnet for Light Weight EV

Jenal¹,

Sulaiman²,

Kumar³

2016

Journal of Magnetics

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Currently, an interest in electric vehicles (EVs) exhibited by automakers, government agencies and customers make it as more attractive research. This is due to carbon dioxide emitted by conventional combustion engine that worsens the greenhouse effect nowadays. Since electric motors are the core of EVs, it is a pressing need for researchers to develop advanced electric motors. As one of the candidates, switched flux machine (SFM) is initiated in order to cope with the requirement. This paper proposes a new alternate circumferential and radial flux (AlCiRaF) of permanent magnet switched flux machines (PMSFM) for light weight electric vehicles. Firstly, AlCiRaF PMSFM is compared with the conventional PMSFM based on some design restrictions and specifications. Then the design refinements techniques are conducted by using deterministic optimization method in order to improve preliminary performance of machine. Finally the optimized machine design has achieved maximum torque and power of 47.43 Nm and 12.85 kW, respectively, slightly better than that of conventional PMSFM.

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“…Stator permanent magnet (PM) machines have attracted considerable attention due to their compact and robust rotor structure, concentrated armature windings, and favorable thermal dissipation conditions by locating both magnets and armature windings on stator [1][2][3][4]. Among stator-PM brushless machines, the flux-switching permanent magnet (FSPM) machines exhibit the specific merits of large torque capability, essentially sinusoidal phase PM flux-linkage [5], and consequently phase back electro-motive-force (back-EMF) waveforms with straight rotor and concentrated windings, as well as high power density and high efficiency [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

2015

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Abstract:Since the air-gap field of flux-switching permanent magnet (FSPM) machines is difficult to regulate as it is produced by the stator-magnets alone, a type of hybrid-excited flux-switching (HEFS) machine is obtained by reducing the magnet length of an original FSPM machine and introducing a set of field windings into the saved space. In this paper, the steady-state characteristics, especially for the loaded performances of four prototyped HEFS machines, namely, PM-top, PM-middle-1, PM-middle-2, and PM-bottom, are comprehensively compared and evaluated based on both 2D and 3D finite element analysis. Also, the influences of PM materials including ferrite and NdFeB, respectively, on the characteristics of HEFS machines are covered. Particularly, the impacts of magnet movement in the corresponding slot on flux-regulating performances are studied in depth. The best overall performances employing NdFeB can be obtained when magnets are located near the air-gap. The FEA predictions are validated by experimental measurements on corresponding machine prototypes.

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Permanent-Magnet Flux-Switching Synchronous Motor Employing a Segmental Rotor

Cited by 69 publications

References 26 publications

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

A New Switched Flux Machine Employing Alternate Circumferential and Radial Flux (AlCiRaF) Permanent Magnet for Light Weight EV

Steady-State Characteristics Analysis of Hybrid-Excited Flux-Switching Machines with Identical Iron Laminations

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