Principles of Stator DC Winding Excited Vernier Reluctance Machines

Jia, Shaofeng; Qu, Ronghai; Li, Jian; Li, Dawei

doi:10.1109/tec.2016.2538773

Cited by 87 publications

(20 citation statements)

References 19 publications

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“…1, the stator/rotor slots of the 1/10 model is 12/11, which is the unit motor, and for the unit motor, the number of armature pole pairs is 5, and the winding factor is 0.933. The working principles of this machine is based on magnetic gear effect, and can be found in [3]. …”

Section: B Machine Parameters and Principlementioning

confidence: 99%

“…In this paper, based on the magnetic geared effect of vernier reluctance machines (VRMs) with DC field winding in the stator [3], a novel fully superconducting synchronous generator (FSCSG) with low temperature superconductors (LTS) for wind power application is proposed. Compared with the existing FSCSGs, the biggest characteristic of this topology is that both the LTS field windings and the armature windings are located in the stationary inner stator, and the external rotating rotor doesn't have any windings or PMs.…”

Section: Introductionmentioning

confidence: 99%

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Design and analysis of a novel vernier reluctance fully superconducting synchronous generator with LTS windings for wind power generation

Jia

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

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In this paper, a novel vernier reluctance fully superconducting synchronous generator (FSCSG) with low temperature superconductors (LTS) for wind power application is proposed. The feature of this superconducting generator is an external rotor structure, and both the superconducting armature windings and DC field windings are in the inner stationary stator. Thus, compared with the existing FSCSFGs, the cryostat and related refrigerate system of the proposed generator is greatly simplified. Besides, the results shows that the torque density is about 37% higher and the torque ripple is as low as 6.9% without any optimization and skewed.

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Section: B Machine Parameters and Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and analysis of a novel vernier reluctance fully superconducting synchronous generator with LTS windings for wind power generation

Jia

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

Self Cite

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“…However, they are more time consuming and cannot really predict the contributions of each inductance harmonic to on-load torque. Other common analytical methods such as Maxwell stress tensor [16]- [17], Virtual work [18]- [19] and Lorentz force law [20]- [21] could be employed. However, due to the doubly salient structure, these methods become extremely complex and hard to implement.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

Zhang

Zhu

et al. 2019

IEEE Trans. Magn.

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including the URL of the record and the reason for the withdrawal request.Abstract-This paper investigates the contribution of each order inductance harmonic to the torque (both average torque and torque ripple) of multiphase doubly salient synchronous reluctance machines (DS-SRMs). Such machines are similar to switched reluctance machines but supplied with sinewave currents. The investigations in this paper are as follows: first, a general analytical torque model based on Fourier Series analysis of inductances has been built for machines with different phase numbers, slot/pole number combinations and also winding configurations. The instantaneous torque for DS-SRMs with any given phase number can then be accurately predicted. Using such model, contribution of each order inductance harmonic to torque can be investigated separately. It is found that the torque ripple frequency of the DS-SRM only depends on phase number. For example, for a m-phase machine, there will be m×k th order torque ripple if , where m is phase number and k is a natural number. This study also explains why certain phase numbers inherently produce lower torque ripple than others. The findings in this paper provide a future direction for potential torque ripple reduction methods either from machine design or advanced control. The simulations have been validated by experiments using a 6-phase DS-SRMs.Index Terms-Doubly-salient, multiphase machine, synchronous reluctance machine, torque harmonic.

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“…However, two sets of concentrated windings, i.e., AC-excited armature winding and DC-excited field winding, are located in the stator. It is proved by the torque production mechanism analysis in [7] [8] that VFRMs are actually one kind of stator-wound-field synchronous machines. In [9], the electromagnetic performance of VFRMs is comprehensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

Feng

Huang

Zhu

et al. 2019

IEEE Trans. Energy Convers.

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Article:Feng, J., Huang, L., Zhu, Z.Q. orcid.org/0000-0001-7175-3307 et al. (2 more authors) (2019) Torque density enhancement of 6/4 variable flux reluctance machine with 2nd harmonic current injection. IEEE Transactions on Energy Conversion, 34 (2). pp.Abstract-Variable flux reluctance machines (VFRMs) are developed as magnetless electrical machines. To extend the application of VFRMs, the enhancement of torque density is a key during machine design. In this paper, a novel 2 nd harmonic current injection method is developed for torque density enhancement for 6-stator-slot/4-rotor-tooth (6/4) VFRM. By using the analytical method, the optimal current profile with injected 2 nd harmonic current is obtained. The average torque of 6/4 VFRM is improved by 20% with the proposed method under all load conditions. Moreover, the proposed current profile has fixed harmonic proportions and is easily applicable to machines with different specifications. All the conclusions are confirmed by both finite element analyses and experimental results.Index Terms-Harmonic current injection method, reluctance machine, torque density. J.H. Feng (S'06) received his B.S. and M.S.

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Principles of Stator DC Winding Excited Vernier Reluctance Machines

Cited by 87 publications

References 19 publications

Design and analysis of a novel vernier reluctance fully superconducting synchronous generator with LTS windings for wind power generation

Design and analysis of a novel vernier reluctance fully superconducting synchronous generator with LTS windings for wind power generation

Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines

Torque Density Enhancement of 6/4 Variable Flux Reluctance Machine With Second-Harmonic Current Injection

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