Comparison Research of Hybrid Excitation Synchronous Generator between Uniform and Nonuniform Rotor Structure

Yu, Junyue; Cao, Yu; Zhu, Shushu; Liu, Chuang

doi:10.1109/iecon.2019.8927161

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Nevertheless, they hardly achieve perfect performances in the EV system that requires both high power density and a wide flux-weakening range [6]. Moreover, conventional CPM has two major drawbacks: clawto-claw flux leakage leads to low efficiency and the use of a slip-ring system leads to low reliability [7][8][9][10][11]. A permanent magnet claw pole machine (PM-CPM) can address the slip-ring system problem and the permanent magnet (PM) excitation method can reduce the volume of the machine and improve the power density and efficiency [12].…”

Section: Introductionmentioning

confidence: 99%

Optimization Design and Performance Evaluation of a Hybrid Excitation Claw Pole Machine

Cao

Zhu

et al. 2022

Processes

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Claw pole machines (CPMs) have the advantages of a simple structure and low cost; therefore, they are commonly used in electric vehicles (EV). However, the methods to improve reliability and efficiency should be studied. So, a new type of hybrid excitation claw pole machine (HE-CPM) for EV is proposed. The permanent magnet (PM) is inserted in the rotor, and the field winding is placed on the front and back ending cover. Because the hybrid flux path of the proposed machine is three-dimensional (3D) and 3D finite element analysis (FEA) is time-consuming, a 3D magnet equivalent circuit (MEC) method considering rotor position is proposed and results between 3D MEC and FEA are compared. Particle swarm optimization (PSO) and 3D MEC are combined in the optimization design of HE-CPM. The optimized results prove the effectiveness of the optimization method. Finally, the flux density distribution, electromagnetic characteristics of HE-CPM are evaluated. The thermal analysis and mechanical stress analysis are carried out. The HE-CPM prototype was manufactured. The direct current (DC) bus voltages under different excitation currents and load currents are measured and compared with those of FEA. When the armature current and the excitation current are 7 A and 4 A, respectively, the rated power and rated speed of HE-CPM are 10.28 kW and 3000 rpm, respectively. The maximum efficiency is 89%. FEA results are basically consistent with the experimental results. Accurate results and time savings can be achieved by combining PSO and 3D MEC.

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Section: Introductionmentioning

confidence: 99%

Optimization Design and Performance Evaluation of a Hybrid Excitation Claw Pole Machine

Cao

Zhu

et al. 2022

Processes

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Analysis of an Axial Field Hybrid Excitation Synchronous Generator

Yu,

Zhu,

Liu

2024

Energies

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An axial field hybrid excitation synchronous generator (AF-HESG) is proposed for an independent power supply system, and its electromagnetic performance is studied in this paper. The distinguishing feature of the proposed generator is the addition of static magnetic bridges at both ends to place the field windings and the use of a sloping surface to increase the additional air-gap cross-sectional area. The advantage of the structure is that it achieves brushless excitation and improves the flux-regulation range. The structure and magnetic circuit characteristics are introduced in detail. Theoretical analysis of the flux-regulation principle is conducted by studying the relationship between field magnetomotive force, rotor reluctance, and air-gap flux density. Quantitative calculation is performed using a magnetomotive force (MMF)-specific permeance model, and the influence of the main parameters on the air-gap flux density and flux-regulation range is analyzed. Subsequently, magnetic field, no-load, and load characteristics are investigated through three-dimensional finite element analysis. The loss distribution is analyzed, and the temperature of the generator under rated conditions is simulated. Finally, a 30 kW, 1500 r/min prototype is developed and tested. The test results show good flux-regulation capability and stable voltage output performance of the proposed generator.

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Comparison Research of Hybrid Excitation Synchronous Generator between Uniform and Nonuniform Rotor Structure

Cited by 2 publications

References 14 publications

Optimization Design and Performance Evaluation of a Hybrid Excitation Claw Pole Machine

Optimization Design and Performance Evaluation of a Hybrid Excitation Claw Pole Machine

Analysis of an Axial Field Hybrid Excitation Synchronous Generator

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