Synchronous motor drives-a forgotten option

Lipo, T.Α.; Du, Zhentao S.

doi:10.1109/optim.2015.7426740

Cited by 33 publications

(12 citation statements)

References 3 publications

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“…Generally, for PM machines to achieve high-speed operation, a negative d-axis current is provided to weaken the rotor flux, which requires an extra control strategy. In [14], the advantages of using wound-rotor synchronous machine for high-speed applications are discussed in comparison with PM machines. For the proposed machine, the high-speed operation is discussed in the following section.…”

Section: Wide-speed Operation and Performance Comparisonmentioning

confidence: 99%

Design and Optimization of a Brushless Wound-Rotor Vernier Machine

et al. 2018

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Abstract:In this paper, a permanent magnet (PM)-less, brushless, wound-rotor vernier machine (BL-WRVM) is proposed for variable speed applications such as electric vehicles and washing machines. The wound rotor is excited through an already existing brushless topology, which requires a dual inverter configuration to generate an additional subharmonic component in the stator magnetomotive force (MMF). Different from permanent magnet vernier machines (PMVMs), the proposed BL-WRVM provides easy regulation of the rotor flux for variable speed operation. A 24-slot, 4-pole stator, and 44-pole outer rotor were designed, and 2D finite element analysis (FEA) was carried out to determine the performance of the proposed machine. To improve the performance of the proposed machine, optimization of the rotor and stator winding turns was done. The optimized model was further analyzed for wide-speed operation, and its performance was then compared with that of an equivalent permanent magnet vernier machine (PMVM). The proposed machine has the advantage of low cost due to its PM-less structure and is suitable for variable speed applications.

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Section: Wide-speed Operation and Performance Comparisonmentioning

confidence: 99%

Design and Optimization of a Brushless Wound-Rotor Vernier Machine

et al. 2018

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“…Moreover, a comparative study on the hybrid excitation topologies has also been covered [7]. Furthermore, an additional single-phase DC excitation winding is placed with the 3-phase stator winding to obtain brushless operation for a hybrid PM assisted synchronous motor [8].…”

Section: Introductionmentioning

confidence: 99%

A Novel Sub-Harmonic Synchronous Machine Using Three-Layer Winding Topology

Rafin

Ali

Lipo

2022

WEVJ

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This paper proposes a novel brushless synchronous machine topology that utilizes stator sub-harmonic magnetomotive force (MMF) for desirable brushless operation. The sub-harmonic MMF component that is used in this novel topology is one fourth of the fundamental MMF component, whereas, in previous practices, it was half. To achieve the brushless operation, the novel machine uses a unique stator winding configuration of two sets of balanced 3-phase winding wound in 3 layers. For the rotor, additional winding is placed to induce the sub-harmonic component to achieve the brushless excitation. Unlike its predecessors, it utilizes maximum allowable space in the stator to house conductors in all of its slots. To implement the topology, 8-pole, 48-slot sub-harmonic brushless synchronous machine model has been designed. A 2-D finite element analysis (FEA) is used to simulate and validate the performance of the novel machine as a motor. The proposed topology shows better average torque than the existing sub-harmonic wound rotor brushless synchronous machine topologies.

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“…Electric machines, one of the core components of the electrified transportation system, and its technologies have been broadly researched particularly in machine topologies, characteristics, control strategies, and performance evaluations [1][2][3][4][5]. Although induction machines have been in the electrified transportation market for a long time, permanent magnet synchronous machines (PMSMs) have taken their place because of higher torque density and efficiency [1,3].…”

Section: Introductionmentioning

confidence: 99%

A novel two-layer winding topology for sub-harmonic synchronous machines

et al. 2022

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With optimized design and modern brushless operation, wound rotor synchronous machines are resurrecting as a strong contender in many applications presently dominated by permanent magnet machines. Considering the notion, this paper introduces a novel brushless synchronous machine topology that utilizes sub-harmonic magnetomotive force (MMF) of its stator winding for desirable brushless operation. It is significant to state that the sub-harmonic MMF component that is used in this novel topology is one-fourth of the fundamental MMF component, whereas, in previous practices, it was half. Moreover, the stator of the machine uses a new winding arrangement of two sets of balanced three-phase windings wound in two layers to produce the fundamental and the sub-harmonic MMF. To achieve the brushless excitation, the rotor utilizes an additional winding that is used to induce the electromotive force (EMF) by the sub-harmonic MMF component of the stator. This novel two-layer stator winding topology permits the utilization of maximum allowable space in the stator to house conductors in all of its 48 slots, which was not the case in previous papers. To validate the performance, and feasibility, an 8-pole 48-slot brushless wound rotor synchronous motor is designed, and a 2-D finite element analysis simulation is conducted, where the topology shows immense potential in terms of better torque performance.

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Synchronous motor drives-a forgotten option

Cited by 33 publications

References 3 publications

Design and Optimization of a Brushless Wound-Rotor Vernier Machine

Design and Optimization of a Brushless Wound-Rotor Vernier Machine

A Novel Sub-Harmonic Synchronous Machine Using Three-Layer Winding Topology

A novel two-layer winding topology for sub-harmonic synchronous machines

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