Cogging Torque Reduction Based on a New Pre-Slot Technique for a Small Wind Generator

García-Gracia, M.; Romero, Ángel Jiménez; Ciudad, Jorge Herrero; Arroyo, Susana Martín

doi:10.3390/en11113219

Cited by 23 publications

(22 citation statements)

References 23 publications

(32 reference statements)

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“…This trend can be seen in this special issue as a majority of the papers deals with PM motors with an emphasis on motor control. Five of the fifteen contributions target renewable energy sources [2][3][4]9,10], whereas the rest are focused on electric motors, with most examining electric vehicles [1,[5][6][7][8][11][12][13][14][15]. Three of the papers address brushless DC (BLDC) motors [7,11,12].…”

Section: Research Presented In This Special Issuementioning

confidence: 99%

“…However, alternatives exist and novel magnets have been heavily researched. Almost all the papers in this special issue are based on NdFeB-magnets, as stated by the authors in references [10][11][12][13] or as assumed from the contents in references [1,[4][5][6][7][8][9]14,15]. However, paper [3] investigates a span of magnetic properties, which could fit any magnet material.…”

Section: Research Presented In This Special Issuementioning

confidence: 99%

“…Design and modeling of PM generators for wind turbines is the subject of [9,10] and reference [3]. The reduction of cogging torque for a surface mounted PM generator is addressed in reference [10]. A pre-slot technique is presented, where a stator slot wedge consisting of both magnetic and non-magnetic material is inserted in the front of each slot.…”

Section: Review Of the Contributions On Machine Design And Modelingmentioning

confidence: 99%

“…This special issue contains the successful invited submissions [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] to a Special Issue of Energies on the subject area of "Permanent Magnet Synchronous Machines". Interest in permanent magnet (PM) synchronous machines is continuously increasing worldwide.…”

Section: Introductionmentioning

confidence: 99%

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Permanent Magnet Synchronous Machines

Eriksson¹

2019

Energies

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Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and electrification of transports. This special issue contains the successful invited submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.

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Section: Research Presented In This Special Issuementioning

confidence: 99%

Section: Research Presented In This Special Issuementioning

confidence: 99%

Section: Review Of the Contributions On Machine Design And Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Permanent Magnet Synchronous Machines

Eriksson¹

2019

Energies

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“…This phenomenon is also common in rotary machines, where the reduction of cogging torque is investigated to maximize the energy performances [44][45][46]. In this case, geometric parameters are usually investigated, such us the introduction of a skewing angle for the stator slots along the main axis or permanent magnets on the rotor [47], the adoption of particular numbers for the realization of stator and rotor teeth [48], and the optimization of the shape of stator teeth [45].…”

mentioning

confidence: 99%

A New Solution for Sea Wave Energy Harvesting, the Proposal of an Ironless Linear Generator

Curto¹,

Viola²,

Franzitta³

et al. 2020

JMSE

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The paper investigates an innovative ironless linear generator, installable inside a wave energy converter, in order to produce electricity from sea waves. This energy source is considered strategic for the future, especially in small islands; however, this technology is still far from the commercial phase. Considering the wave energy potential of the Mediterranean Sea, a first prototype of the electrical linear generator was realized at the Department of Engineering of Palermo University. This machine can be run by a two-floating buoys system, able to produce a linear vertical motion. The main goal of this paper is the investigation of the advantages and the disadvantages of the utilization of steel materials to realize the stator of linear generators. Thus, starting from the prototype, the authors analyzed the effects produced by the replacement of steel in the stator with a non-magnetic material. For comparison, the authors evaluated the amplitude of no-load voltages, using a three-phase connection scheme, and the amplitude of the magnetic force produced by the interaction of magnets with the stator. Both aspects were evaluated through numerical simulations and mathematical models.

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Investigation Cogging Torque of PMM with rotor and Stator optimization for renewable energy application

Sirait

Siregar

Nur

et al. 2022

J. Phys.: Conf. Ser.

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This paper proposes the cogging torque reduction by using the optimization of the slotting method on the stator and the cutting edge of the rotor side magnet of the Permanent Magnet Machiene (PMM), of the Synchrounous Generator (PMSG). Here, the effect on the cross-sectional area of the magnetic poles and the additional width of the slot opening will lead to an improvement in the reduction of cogging torque for the investigated of the machine. The proposed machine has 6 poles and 18 slots with a fixed slot opening widths on the stator and modified magnetic poles on the rotor. The software used to investigate and analyze the saturation of the induced cores in the stator and rotor of machine is the magnetic finite element method (FEMM 4.2). The most cost-effective method to minimize the presence of cogging torque of any PMSG is to conduct the modification of the rotor where the magnets are located and modify the stator structure despite the complexity and cost of manufacturing the stator. Here, the cutting of magnetic edge structure using a simple cutting method is implemented. This is a different method from that already widely implemented for cutting the edge of the magnet surface. The simulation results show that the PMSG cogging torque by cutting the magnetic edge and adding a dummy slot can significantly minimize the cogging torque. It is found that the cogging torque reduction is 99.47 percent. This condition as the low cogging torque and low PMG speed can be used for reference design and PMSG construction for renewable energy plants such as in geothermal power plants.

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Cogging Torque Reduction Based on a New Pre-Slot Technique for a Small Wind Generator

Cited by 23 publications

References 23 publications

Permanent Magnet Synchronous Machines

Permanent Magnet Synchronous Machines

A New Solution for Sea Wave Energy Harvesting, the Proposal of an Ironless Linear Generator

Investigation Cogging Torque of PMM with rotor and Stator optimization for renewable energy application

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