Optimal design of dual stator spoke type vernier machine considering armature winding placement

Siddiqi, Mudassir Raza; Khaliq, Salman; Kwon, Jung-Woo; Kwon, Byung-il

doi:10.3233/jae-171072

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The operation principle of the PMVMs is based flux modulation effect as mentioned in [16]. The stator windings produce a low-order harmonic field and the rotor poles generate a high-order harmonic field.…”

Section: Pmvm Model Topology Specifications and Working Principlementioning

confidence: 99%

“…Consequently results in an increased volume as well as the overall cost increase of PMVM manufacturing as compared to other machines [12]. Furthermore, many dual airgap PMVM models have been presented in [13], [14], [15], [16], and [17] to improve the torque density of the machine as compared to single airgap models. The comparison between dual airgap and single airgap PMVM is presented in [18] which shows that the torque density and other performances of the single air gap model are poor as compared to the dual airgap models.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Verification of Dual Airgap PMVM Having Yokeless Rotor for Extended Speed Application

Siddiqi

Yazdan

et al. 2022

IEEE Access

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Permanent magnet vernier machines (PMVM) are recently proven to be a good candidate for extended-speed operation in the constant power region. In this paper, a dual-airgap PMVM having a yokeless rotor has been presented for extended-speed operation. The PMVM model is designed with two stators and a sandwiched rotor without an iron yoke. To achieve the extended speed operation, the yokeless structure of dual airgap PMVM benefits from the increased inductance which makes it possible to operate at higher speeds. For this purpose, the prototype of this machine is built, and experimental testing is performed to verify its performance in a constant power region. Electromagnetic performance such as back EMF and output torque at high speeds are analyzed. The experimental results are compared with those obtained using finite element analysis which confirms the ability of dual airgap PMVM having a yokeless rotor to perform well at higher speeds in a constant power region.INDEX TERMS Dual airgap PMVM, radial type, yokeless rotor, extended speed operation, finite element method, experimental verification.

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Section: Pmvm Model Topology Specifications and Working Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Verification of Dual Airgap PMVM Having Yokeless Rotor for Extended Speed Application

Siddiqi

Yazdan

et al. 2022

IEEE Access

Self Cite

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“…Consequently, various PMVM topologies have been introduced to further increase the torque density. Some major topologies include consequent-pole [15], dual-stator [16][17][18][19], and multipole dual-stator designs [20], [21]. Although these designs significantly improve the torque density they have very complex structures and weak mechanical support, particularly, the dual rotor and dual stator.…”

Section: Introductionmentioning

confidence: 99%

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Ullah

Siddiqi

Ahmed

2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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As the topologies of permanent magnet vernier machines (PMVM) is getting more complex such as dual rotor and its variants. The thermal, mechanical, and especially demagnetization concern increasing. In this paper, the demagnetization risk evaluation of three similar topologies of dual stator radial type PMVM is presented. Three recently published topologies: dual winding with rotor-yoke, dual winding without rotor-yoke, and single winding without yoke are selected. This design highly improved the torque density and reduced the overall volume. However, the permanent magnets (PMs) in these topologies are at huge risk of irreversible demagnetization. Furthermore, the overall performance of PMtype machines is incomprehensible without a detailed demagnetization analysis. Therefore, a comprehensive mechanical, thermal, and demagnetization analysis considering various operating points and temperatures is conducted to evaluate the risk of demagnetization in these topologies. Finally, some modification are made to optimize of these designs. All analyses are carried out using finite element analysis and cosimulation in ANSYS maxwell and mechanical.

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“…Compared with other IPM machines, the spoke-type FSCW machine can achieve high torque density due to the flux concentration (Carraro et al , 2018). However, the spoke-type machine exhibits some drawbacks which are summarized as limited flux weakening capability, low reluctance torque and high torque ripple (Siddiqi et al , 2019). To improve the performance of spoke-type FSCW IPM machine, some of novel spoke-type IPM machines are proposed (Zhang et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of a spoke-type permanent magnet motor with fractional-slot concentrated windings for EVs

Liu

Huang

2021

COMPEL

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Purpose This paper aims to propose a spoke-type fractional-slot concentrated windings (FSCW) PM machine for EVs driving system to improve torque density. To further improve electromagnetic performance, the multi-objective optimization design is processed based on response surface (RS) model and simulated annealing cuckoo search (SA-CS) algorithm. Design/methodology/approach The spoke-type FSCW PM machine is designed and optimized to meet the requirement of EVs driving system. First, a spoke-type FSCW PM machine is designed and some of key parameters are obtained based on equivalent magnetic circuit (EMC) method. Then, the RS model and modified SA-CS algorithm are proposed to obtain higher torque, lower torque ripple and higher efficiency. Findings After verification by finite element method for no-load and load performance, the optimal machine has higher torque density, lower torque ripple and higher efficiency compared with initial machine. Finally, a 20 kW prototype is manufactured and tested to verify the validity of the proposed optimization design method. Originality/value This paper designs a high torque density spoke-type FSCW PM machine, which is superior for EVs driving system. Meanwhile, a novel modified SA-CS algorithm is applied to the field of electrical machine multi-objective optimal design.

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Optimal design of dual stator spoke type vernier machine considering armature winding placement

Cited by 4 publications

References 12 publications

Experimental Verification of Dual Airgap PMVM Having Yokeless Rotor for Extended Speed Application

Experimental Verification of Dual Airgap PMVM Having Yokeless Rotor for Extended Speed Application

Demagnetization Risk Assessment in a Dual Stator Permanent Magnet Vernier Machines

Multi-objective optimization of a spoke-type permanent magnet motor with fractional-slot concentrated windings for EVs

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