Design and Analysis of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

Lu, Binglin; Xu, Yanliang; Ma, Xin

doi:10.1109/tasc.2016.2594868

Cited by 19 publications

(9 citation statements)

References 8 publications

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“…where Im is the amplitude of the phase current, and δ is the torque angle [19]. The energy stored in the magnetic field can be expressed as Supposing that m is the number of phases, p is the number of stator poles per phase, n is the number of PMs, and Z r is the number of rotor teeth, the motor topologies can be expressed as follows:…”

Section: Topologies and Operational Principlementioning

confidence: 99%

“…where Im is the amplitude of the phase current, and δ is the torque angle [19]. The energy stored in the magnetic field can be expressed as The energy stored in the magnetic field can be expressed as…”

Section: Topologies and Operational Principlementioning

confidence: 99%

“…The magnetic leakage factor σ can be defined as σ = ϕm/ϕδ [23]. Assuming that Rpm, Rδ, and ϕδ of the two motors are designed to be the same [19], ϕm can be thus obtained as …”

Section: Pm Grade Pm Flux Leakage and Pm Utilization Ratementioning

confidence: 99%

“…The detailed specifications and main design parameters of the prototype machine are listed in Table 1. Assuming that R pm , R δ , and φ δ of the two motors are designed to be the same [19], φ m can be thus obtained as…”

Section: Experimental and Fea Verificationmentioning

confidence: 99%

“…where k and j are positive integers which include the motor topologies in [18,19]. The proposed SHSM has the same operational principle as that of the HSM, due to structure equivalent transformation.…”

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confidence: 99%

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Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

2017

Energies

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Abstract:In this paper, a new type of hybrid stepping motor (HSM) with permanent magnets (PMs) embedded in the stator, namely the stator-permanent-magnet hybrid stepping motor (SHSM), is presented. It has the same operation principles as the traditional HSM, with a 2-D distributed magnetic field nature and superiorities such as simpler rotor structure, easier PM cooling, higher torque and power density, and higher power grade. Its structural topology and operation principles are initially presented. Then an investigation on the performance comparison between the HSM and the SHSM, in terms of PM flux density, PM torque, detent torque, positional holding accuracy, stator core saturation issue, PM flux leakage, and PM utilization rate is carried out theoretically to make an assessment of the performance superiorities of the SHSM. A prototype of a 2-phase 8-pole 50-rotor-tooth SHSM is fabricated and experimentally compared with the HSM by using finite element analysis (FEA) to verify the motor's operational feasibility and the theoretical analysis. The FEA and experimental results show that the proposed SHSM has performance advantages such as higher torque density, higher power grade, and higher pull-out torque, holding torque, and torque-speed property, although it has performance defects such as higher torque ripple and relatively lower positional holding accuracy in the open-loop operation than the conventional HSM. Consequently, this novel SHSM is more suitable for electromechanical energy conversion applications rather than positioning mechanisms, especially taking into account the open-loop control advantage.

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Section: Topologies and Operational Principlementioning

confidence: 99%

Section: Topologies and Operational Principlementioning

confidence: 99%

“…The magnetic leakage factor σ can be defined as σ = ϕm/ϕδ [23]. Assuming that Rpm, Rδ, and ϕδ of the two motors are designed to be the same [19], ϕm can be thus obtained as …”

Section: Pm Grade Pm Flux Leakage and Pm Utilization Ratementioning

confidence: 99%

Section: Experimental and Fea Verificationmentioning

confidence: 99%

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