Suitable design of a PMSG for a large-scale wind power generator

Direct drive generator is favorable in wind energy conversion system (WECS), as it eliminates the vibration, noise, and losses from the gear used in geared-drive wind generators.However, the direct drive wind generator suffers from the large size and heavy weight problem.The purpose of this research project is to design a generator with improved performance for the direct drive WECS.A new concept segmented permanent magnet (PM) machine was introduced, whose proposed features show that it is very suitable for the application of direct drive wind generator.The analytical models for both single-airgap and double-aigap segmented PM machines were built for initial design. Then finite element models were created to further investigate the characteristics and performance of this type of machine.To optimize the segmented PM machine, a finite element analysis based machine design optimization program was developed. This program use differential evolution, a powerful optimization algorithm, to provide outer shell, leading to fast convergence. And the adoption of FE analysis guarantees the accuracy of results. Compared to initial designs, the optimized segmented PM machine' torque density has been significantly improved, along with reduction in total active material cost.ii

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“…changing from semi-closed slot to open slot, replacing magnet banding with inset PM configuration [29,30], increasing airgap thickness.…”

Section: Comparison Of Srss Topologiesmentioning

confidence: 99%

Segmented permanent magnet synchronous machines for wind energy conversion system

Jiang

Reddy

Jahns

et al. 2014

2014 IEEE Symposium on Power Electronics and Machines for Wind and Water Applications

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“…The inset PMSM is superior in performance to the surface-mounted type as it has a strong rotor structure, low eddy current loss, and wide flux-weakening capability [1][2][3]. The inset PMSM is currently used in electric vehicles [4], wind power generation [5], and flywheel energy storage systems [6]. However, the inset PMSM is mainly utilized for medium to large size applications rather than small size ones due to the difficulty of manufacturing it.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an Inset Micro Permanent Magnet Synchronous Motor Using Soft Magnetic Composite Material

Pang¹,

Shi²,

Xie³

et al. 2020

Energies

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This paper presents the world’s smallest inset permanent magnet synchronous motor (PMSM) with a soft magnetic composite (SMC) core, providing ease of manufacturing for micromachine applications without silicon steel laminations. The inset motor can offer an additional reluctance torque and higher torque density with a lower usage amount of permanent magnet. A 15 mm diameter inset motor was developed with the thickness of a tile-type permanent magnet which is limited to 1 mm by the manufacturer. The motor was designed with high torque density and low torque ripple by varying the interpole iron width for the rotor. Two inset motors were made using both SMC and silicon steel materials for comparison. The performance of the SMC motor was inferior to the silicon steel motor, but it still meets the specifications of the commercial market. If the thickness of the tile-type permanent magnet is further reduced, the micro inset motor with a SMC core can be easily mass-manufactured using powder sintering.

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“…With advancements in power electronics and permanent magnet materials (such as neodymium–iron–boron), rapid growth in PMSGs has been realised [7]. Thus, much research on WPGSs using PMSGs has been conducted on both large‐ [8] and small‐scale [9, 10] systems.…”

Section: Introductionmentioning

confidence: 99%

Sensorless fuzzy‐logic‐based maximum power point tracking control for a small‐scale wind power generation systems with a switched‐mode rectifier

Lee

Kim

2016

IET Renewable Power Generation

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A fuzzy inference system (FIS) based sensor less maximum power point tracking (MPPT) algorithm has been proposed. The Fuzzy based controller has the ability to track the maximum power point (MPP) and the corresponding rotor speed of the wind generator by estimating wind speed with very little error compared to the conventional MPPT techniques. The algorithm developed is based on two series fuzzy networks, one for wind speed estimation and the other to determine the maximum power point and the corresponding rotor speed. The method demonstrates remarkable performance in estimating wind speed and to predict MPP accurately without undesired oscillations around maximum power point. The algorithm does not require any mechanical sensor for wind speed measurement. Nonlinear time domain simulations have been carried out to validate the effectiveness of the proposed controllers under different operating conditions. Simulation results confirm the effectiveness of the proposed MPPT controller in tracking the maximum power point under rapidly changing wind conditions.

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Suitable design of a PMSG for a large-scale wind power generator

Cited by 24 publications

References 12 publications

Segmented permanent magnet synchronous machines for wind energy conversion system

Segmented permanent magnet synchronous machines for wind energy conversion system

Investigation of an Inset Micro Permanent Magnet Synchronous Motor Using Soft Magnetic Composite Material

Sensorless fuzzy‐logic‐based maximum power point tracking control for a small‐scale wind power generation systems with a switched‐mode rectifier

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