Review of Switched Flux Wound-Field Machines Technology

Khan, Faisal; Sulaiman, Erwan; Ahmad, Zaki

doi:10.1080/02564602.2016.1190304

Cited by 33 publications

(14 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…21 shows the average torque versus current density for IPM and 6-slot/7-pole WFFSM machine [13]. The average electromagnetic torque, T e , generally consist of an excitation torque, T ex , and reluctance torque, T rl, and expressed for multiphase arrangement as [19].…”

Section: Torque Comparisonmentioning

confidence: 99%

“…23 shows the copper losses analysis of 12‐slot/13‐pole outer rotor FEFSM. The outer rotor FEFSM at the armature current density of 20 A/mm 2 and field current density of 20 A/mm 2 has 6.5 percent less copper losses as compared to 6‐slot/7‐pole WFFSM [19]. It is observed the increasing armature current density increases in copper losses too.…”

Section: Efficiency and Loss Analysismentioning

confidence: 99%

“…The average electromagnetic torque, T e , generally consist of an excitation torque, T ex , and reluctance torque, T rl, and expressed for multiphase arrangement as [19].

T_{e} = \sum_{W} T_{rl, W} + \sum_{W} T_{ex, W}

T_{e} = \frac{1}{2} \sum_{W} i_{W}^{2} \frac{d L_{W}}{d θ} + \sum_{W} i_{W} \frac{normald Ψ_{ex}}{normald θ}

…”

Section: Torque Comparisonmentioning

confidence: 99%

See 2 more Smart Citations

Outer rotor wound field flux switching machine for In‐wheel direct drive application

Ahmad

Khan

Ali

et al. 2019

IET Electric Power Applications

Self Cite

View full text Add to dashboard Cite

Nowadays the flux switching machines offer pivotal role in high speed applications. The flux sources (field excitation coil and armature winding or permanent magnet) are confined to the stator leaving rotor completely passive, and thus making the flux switching machine (FSM) more suitable for industrial applications. This paper emphasizes salient rotor pole and nonoverlapping windings embedded in electrical machine design possess some pertinent features such as reduced copper losses, low-cost, and usage in high speed applications. The proposed design is analyzed for coil test analysis and flux linkage and torque. On the basis of the analysis performed, it is clear that 12-slot/13-pole has low cogging torque, high flux linkage, and maximum torque, compared with other topologies of outer rotor field excitation FSM. A deterministic optimization technique is adopted to enhance the performance of 12-slot/13-pole design. Further, finite element analysis (FEA) results are verified through Global Reluctance Network (GRN) methodology, which show close resemblance with error less than 1.2%. Hence, it validates the proposed design for outer rotor field excitation FSM direct drive application. The proposed design for hybrid electric vehicle torque characteristic is compared with existing interior permanent magnet synchronous machine (IPMSM) and 6slot/7-pole wound field flux switching machine (WFFSM).

show abstract

Section: Torque Comparisonmentioning

confidence: 99%

Section: Efficiency and Loss Analysismentioning

confidence: 99%

See 1 more Smart Citation

Outer rotor wound field flux switching machine for In‐wheel direct drive application

Ahmad

Khan

Ali

et al. 2019

IET Electric Power Applications

Self Cite

View full text Add to dashboard Cite

show abstract

“…The toroidal winding has short end connection. The advantages of toroidal winding are to reduce copper losses, increase the efficiency, reduce volume and weight of the machine and is applicable for high-speed applications [ 21 ]. Performance analysis is carried out in this section in terms of electromagnetic torque, flux linkage and cogging torque of toroidal winding and is summarized in Table 1 .…”

Section: Design Of Different Winding Configurationsmentioning

confidence: 99%

Partitioned Stator Switched Flux Machine: Novel Winding Configurations

Irfan

Rehman

Khan

et al. 2020

Entropy

Self Cite

View full text Add to dashboard Cite

Torque density is one of the major limiting factors in machine design. In this paper, we propose the hybrid excited partitioned stator switched flux machine3 (HE-PSSFM3). In HE-PSSFM3, armature winding is positioned on the outer stator whereas the permanent magnet (PM) and field winding are placed at the inner stator, while the rotor is free from excitation sources and armature winding. Moreover, concentrated field winding is replaced by toroidal winding. The power splitting ratio between two stators/rotor pole combinations is analytically optimized and are validated through genetic algorithm (GA) in order to enhance average torque and flux regulation capability. The electromagnetic characteristics of the improved and initial design are evaluated and compared with existing designs, i.e., HE-PSSFM1 and HE-PSSFM2. The proposed HE-PSSFM3 has achieved high average torque, i.e., 2.0015 Nm, at same armature and field current densities of 5 A/mm2. The results show that the average torques of the proposed design are 35% and 15% greater than HE-PSSFM1 and HE-PSSFM2, respectively. Furthermore, the analysis of various parameters such as flux linkage, flux regulation, electromagnetic performances, cogging torque, back EMF, electromagnetic torque, and torque ripples are investigated using two dimensional (2D) finite element analysis (FEA). Moreover, the simulation results of the proposed design are validated through GA and analytical modeling.

show abstract

“…Moreover, the final FEFS motor design has high torque density compared to 12S-8P segmental rotor FEFS motor due to saturation of rotor segments as well as high torque density than 12S-14P FEFS motor with toroidal DC winding due to limited torque generation as the field flux produced by FE coil close to outer surface of stator goes through outside of the stator instead of the rotor. The final FEFS motor design has 67% high torque density compared to outer rotor FEFS motor [41].…”

Section: Torque and Power Versus Speed Curvesmentioning

confidence: 99%

Field-Excited Flux Switching Motor Design, Optimization and Analysis for Future Hybrid Electric Vehicle Using Finite Element Analysis

Sulaiman¹,

Khan²,

Kosaka³

2016

PIER B

Self Cite

View full text Add to dashboard Cite

Design, optimization, and performance analysis of a three-phase field-excited flux switching (FEFS) motor to be employed for the future hybrid electric vehicle (HEV) drive applications is investigated in this paper. The stator of designed motor made of electromagnetic steels is composed of unique field mmf source and armature coils while a rotor is made of iron stack. This design has been evaluated in order to achieve power and torque density higher than 3.50 kW/kg and 210 Nm, respectively, so as to compete with the interior permanent magnet synchronous (IPMS) motor commonly installed in HEV. Given its robust rotor structure, the maximum achievable motor speed went up to 20,000 rpm. To perfect the motor design, a deterministic optimization approach was applied to meet the stringent performance requirements. In addition, experimental analyses were carried out to confirm the effectiveness of the proposed motor. Positively, the proposed FEFS motor has proved to be a suitable candidate of non-permanent magnet motor for efficient and safe HEV drive.

show abstract

Review of Switched Flux Wound-Field Machines Technology

Cited by 33 publications

References 51 publications

Outer rotor wound field flux switching machine for In‐wheel direct drive application

Outer rotor wound field flux switching machine for In‐wheel direct drive application

Partitioned Stator Switched Flux Machine: Novel Winding Configurations

Field-Excited Flux Switching Motor Design, Optimization and Analysis for Future Hybrid Electric Vehicle Using Finite Element Analysis

Contact Info

Product

Resources

About