Theoretical and experimental analysis of a three-phase permanent magnet claw-pole synchronous generator

Jurca, Florin Nicolae; Marțiș, Claudia

doi:10.1049/iet-epa.2012.0075

Cited by 20 publications

(15 citation statements)

References 11 publications

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“…Due to fault tolerance consideration and the fractional number of slots per pole and phase (q = 1.5), a single-layer fractional winding was chosen. The rms value of the phase electromotive force (emf) is given by [6]:…”

Section: Design Of Pmcpsgmentioning

confidence: 99%

Design of a Low‐Cost Permanent Synchronous Machine for Isolated Wind Conversion Systems

Jurca¹

2016

Wind Turbines - Design, Control and Applications

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The chapter deals with the theoretical analysis of two configurations of low-cost permanent synchronous generator (PMSG), suitable for small rating, direct driven applications, such as small-and microscale wind power plants. The first structure is a permanent magnet claw-pole synchronous generator (PMCPSG) to be used in an isolated microwind power plants with installed power around few hundred Watts. A permanent magnet synchronous machine with outer rotor (PMSMOR) is the second presented structure, suitable for small wind system with installed power between 2 and 5 kW. In order to obtain the optimal value of the main geometric dimensions of the generators, an optimization procedure, based on Hooke-Jeeves method, was implemented for all the considered structures.

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Section: Design Of Pmcpsgmentioning

confidence: 99%

Design of a Low‐Cost Permanent Synchronous Machine for Isolated Wind Conversion Systems

Jurca¹

2016

Wind Turbines - Design, Control and Applications

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“…The claw pole is a necessary component of a synchronous generator with direct-current (DC) excitation, which is commonly used in the automobile industry because of its low cost and ease of regulation [1]. Claw poles are mainly manufactured by hot forging: common forging schemes include closed-die forging [2], casting-forging [3], single forging with a spring-controlled die [4], and radial forging with forward extrusion [5].…”

Section: Introductionmentioning

confidence: 99%

“…Addition of boron caused undesirable deterioration of the magnetic properties of a permalloy, while the effects of magnesium and calcium on its magnetic properties were small [10]. A ring sample can easily form a closed magnetic circuit, but the disadvantages of this method include: (1) considering the thermal effect, it is not possible to apply very large circumferential fields [11]; (2) for a real part like a claw pole, the measured results are closely related to the sampling position; (3) it can be time-consuming because primary and secondary windings must be applied to each sample.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive Measurement of Magnetic Properties of Claw Pole

Bai

Tang³

et al. 2019

Chin. J. Mech. Eng.

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The magnetic properties of the claw pole have a direct effect on the output power of a generator. Many methods can be used to measure these magnetic properties, each with its own advantages, but an important shortcoming is that all are destructive. In this study, a new non-destructive method to measure the magnetic properties of claw pole was proposed and a corresponding testing setup was designed. A finite-element model was constructed to simulate the measurement process. Results proved that the measured magnetization-like curves had good agreement with the trend of the input magnetic curves and the effect of the positioning error in the measuring process could be neglected. To further validate the new method, seven types of claw poles of different materials subjected to different heat-treatment processes were forged and tested by both the new method and the conventional ring-sample method. Compared with the latter, the new method showed better consistency, relatively higher accuracy, and much stronger stability of measurement results; however, its sensitivity needs to be improved. The effects of material compositions and heat-treatment parameters on the magnetic properties of the claw pole were briefly analyzed.

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“…Brushless excitation generators exhibit several key features, such as high reliability, easy maintenance and so on [1][2][3][4][5]. Many methods have been studied to realise brushless excitation, such as doubly salient generators, claw-pole generator and so on [6][7][8][9][10][11][12][13][14][15]. Most of the above-mentioned generators are still at the research stage.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental analyses of a hybrid excitation synchronous generator with integrated brushless excitation

Zhu

Liu

Wang

et al. 2016

IET Electric Power Applications

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This paper proposes a novel integrated brushless excitation method (IBEM) for a rotor-excited generator. IBEM is applied to a rotor-excited hybrid excitation synchronous generator (HESG) to realise brushless excitation while the key features of the rotor-excited generator are maintained. The new generator is referred as IBE HESG here. The stator excitation windings are buried in the stator slots. The static excitation field is established in the air gap when there is dc excitation current in the stator excitation windings. The three-phase armature coils of the rotor induce the static excitation field and provide the dc excitation current for the rotor excitation windings via a rotating rectifier. The operating principles are discussed theoretically. The magnetic field distribution and the operating characteristics are studied by finite-element analysis. The no-load, external, regulation and excitation characteristics are analysed. Compared with the brush excitation HESG, the rotor excitation current is able to meet the requirement and the output voltage is conveniently regulated by the stator excitation current. Finally, a 1.5 kVA prototype is fabricated to test the operating characteristics of IBE HESG. It demonstrates that the brushless excitation is realised and the output voltage is regulated by the stator excitation current.

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Theoretical and experimental analysis of a three-phase permanent magnet claw-pole synchronous generator

Cited by 20 publications

References 11 publications

Design of a Low‐Cost Permanent Synchronous Machine for Isolated Wind Conversion Systems

Design of a Low‐Cost Permanent Synchronous Machine for Isolated Wind Conversion Systems

Non-destructive Measurement of Magnetic Properties of Claw Pole

Theoretical and experimental analyses of a hybrid excitation synchronous generator with integrated brushless excitation

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