Design and Optimization of a Brushless Wound-Rotor Vernier Machine

Ali, Qasim; Hussain, Asif; Baloch, Noman; Kwon, Byung-il

doi:10.3390/en11020317

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…Figure 1 shows the schematic representation of the conventional dualinverter Bl-WRVM. This is the brushless sub-harmonic topology introduced in [13] and also used for BL-WRVM in [14]. In this topology, 2 separate inverters supply currents to the distributed windings in the stator.…”

Section: Conventional Dual-inverter Bl-wrvm Topologymentioning

confidence: 99%

“…However, its field winding is on the rotor, which avoids the issues of DC-VRM. In [14], a brushless wound-rotor vernier machine (BL-WRVM) was proposed for variable-speed applications. The speed of the machine was controlled by controlling the field flux.…”

Section: Introductionmentioning

confidence: 99%

“…The rest of the paper is organized as follows. In the second section, the conventional brushless WRVM [14] and the proposed WRVM configurations are discussed. In the third section, 2D finite element analysis (2D-FEA) simulation results for the conventional brushless WRVM and proposed brushless WRVM model are discussed.…”

Section: Introductionmentioning

confidence: 99%

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Design and Analysis of Single Inverter-Fed Brushless Wound Rotor Vernier Machine

et al. 2022

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Section: Conventional Dual-inverter Bl-wrvm Topologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Analysis of Single Inverter-Fed Brushless Wound Rotor Vernier Machine

et al. 2022

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“…In principle, the harmonic field excitation method involves developing a supplementary harmonic MMF component in the airgap besides the fundamental component [15]- [18]. In the case of WFVMs, the only successful attempt in this regard is recently made in which a brush-less WFVM topology for electric vehicle and washing machine applications while considering the sub-harmonic field excitation method is developed [19]. This topology is based on a dual-inverteroutline.…”

Section: Introductionmentioning

confidence: 99%

Novel Self-Excited Brush-Less Wound Field Vernier Machine Topology

et al. 2022

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To realize the brush-less operation for wound field vernier machines (WFVMs), a novel selfexcited topology is proposed in this paper which involves a four-pole main armature winding and a twopole excitation winding connected in series using an uncontrolled rectifier. Upon supplying current from a single current-controlled voltage source inverter (VSI), this procedure results in four-pole and two-pole magnetomotive force (MMF) components in the airgap. The four-pole MMF produces the main stator field while the two-pole MMF component develops a sub-harmonic field in the airgap. The rotor is altered to house a forty-four-pole rotor field and two-pole harmonic windings. The two-pole harmonic field is employed to induce a current in the harmonic winding, which is rectified by means of a full-bridge diode rectifier to energize the rotor field winding and realize brush-less operation for WFVM. Two-dimensional finite element analysis (2-D FEA) is implemented in JMAG-Designer to confirm the operation of the proposed WFVM topology and attain the electromagnetic performance for a four-pole, twenty-four-slot outer-rotor vernier machine.INDEX TERMS Wound field vernier machine; harmonic field excitation; self-excited machines; wound rotor.

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Brushless field‐excitation method for wound‐rotor synchronous machines

Bukhari

Ahmad

Akhtar

et al. 2021

Int Trans Electr Energ Syst

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Summary This paper proposes a simplified harmonic field‐excitation scheme for the brushless operation of wound‐rotor synchronous machines (WRSMs). The proposed scheme involves two inverters that are operating at different frequencies to provide an input current to the armature winding of the machine. One of these two inverters works at a frequency of 60 Hz and provides the regular three‐phase fundamental current, whereas the second inverter works at 180 Hz frequency to supply the single‐phase third‐harmonic to the common point of the start‐connected stator winding of the machine. The proposed method has the advantage that a conventional single‐phase inverter can be used for generating the third‐harmonic current which only needs to be operated at three times the frequency of the first inverter supplying the three‐phase fundamental current. The fundamental three‐phase current generates the main armature field, and the single‐phase third‐harmonic current produces a pulsating magnetomotive force, that induces electromotive force (EMF) in the harmonic winding of the rotor. The induced EMF is rectified to supply field current to the rotor and generates the rotor field. This field, when interacts with the main armature field, produces torque. The proposed brushless field‐excitation scheme for WRSMs is implemented in JMAG‐Designer version 19.1 using 2‐D finite element analysis to realize its operation and analyze its performance.

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Design and Optimization of a Brushless Wound-Rotor Vernier Machine

Cited by 8 publications

References 14 publications

Design and Analysis of Single Inverter-Fed Brushless Wound Rotor Vernier Machine

Design and Analysis of Single Inverter-Fed Brushless Wound Rotor Vernier Machine

Novel Self-Excited Brush-Less Wound Field Vernier Machine Topology

Brushless field‐excitation method for wound‐rotor synchronous machines

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