Low Speed Directly Driven Permanent Magnet Synchronous Generators for Wind Energy Applications

Popesci, M.; Cistelecan, Mihail V.; Melcescu, Leonard; Covrig, Mircea

doi:10.1109/iccep.2007.384303

Cited by 24 publications

(9 citation statements)

References 1 publication

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“…This research focuses on the performance evaluation of a double-layer SM-PMSG. This configuration is advantageous for direct-drive wind generators in terms of weight, cost, and torque ripple [19][20][21][22]. To minimize the 5th and 7th harmonics, the pitch factor is chosen as 5/6.…”

Section: Methodology 21 Pmsg Configurationmentioning

confidence: 99%

Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator

Hoang

Nguyen

2022

UD-JST

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This article investigates the structural optimization of a 20-MW offshore wind generator to minimize the torque ripple and mass. The surface-mounted permanent magnet topology will be chosen for the generator. In addition, the double-layer armature winding configuration will be utilized. The direct-drive technology will be adopted to increase the reliability of the offshore wind energy conversion system. The multi-objective optimization of the generator is carried out based on the particle swarm algorithm. Results show that the torque ripple of the optimal model is significantly reduced to as much as 0.41% at full-load conditions making the configuration suitable for the high-power offshore wind generator.

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Section: Methodology 21 Pmsg Configurationmentioning

confidence: 99%

Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator

Hoang

Nguyen

2022

UD-JST

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“…The rotor is divided into several cylindrical segments of equal length. When adjacent segments are rotated on their axis by a constant angle [3,[27][28][29], the period of the cogging torque can be determined from Equation (5). If the machine has a two-segment rotor structure, the skew angle displacement of one-half cogging torque period is the best angle to reduce the cogging torque [28].…”

Section: Finite Element Methods Of Hmpp In Cogging Torque Analysismentioning

confidence: 99%

“…But in some cases cogging torque appears due to the spatial periodicity of the magnetic structure [5].…”

Section: Open Accessmentioning

confidence: 99%

A Novel Cogging Torque Simulation Method for Permanent-Magnet Synchronous Machines

2011

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Abstract:Cogging torque exists between rotor mounted permanent magnets and stator teeth due to magnetic attraction and this is an undesired phenomenon which produces output ripple, vibration and noise in machines. The purpose of this paper is to study the existence and effects of cogging torque, and to present a novel, rapid, half magnet pole pair technique for forecasting and evaluating cogging torque. The technique uses the finite element method as well as Matlab research and development oriented software tools to reduce numerous computing jobs and simulation time. An example of a rotor-skewed structure used to reduce cogging torque of permanent magnet synchronous machines is evaluated and compared with a conventional analysis method for the same motor to verify the effectiveness of the proposed approach. The novel method is proved valuable and suitable for large-capacity machine design.

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“…The generator is designed with multi-pole for low speed operation and thus has a relatively large diameter [18]. The advantages include high overall system efficiency, compact structure, reduced rotor loss because of the permanent magnet, and low maintenance due to the elimination of the gear box.…”

Section: Variable Speed Wecs With Full Power Convertersmentioning

confidence: 99%

A novel configuration and control of CSI wind energy system with diode rectifier and buck converter

Tan¹

2021

Preprint

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This thesis is dedicated to the research of a new converter configuration and control scheme development for direct drive permanent magnet synchronous generator (PMSG) based high power wind energy conversion system (WECS). The proposed converter consists of a diode rectifier, a buck converter and a pulse-width modulated (PWM) current source inverter (CSI). Detailed feasibility study of the proposed configuration is conducted based on the theoretical analysis. A suitable control scheme is designed to optimize the system performance. The maximum power point tracking (MPPT) is achieved through duty cycle adjustment of the buck converter, while the reactive power delivery and the DC current regulation are realized by the CSI controller through manipulating modulation index and delay angle. More importantly, the DC current is evaluated and controlled to the minimum value at various operating conditions. Simulation of a 2 MW WECS is carried out in Matlab/Simulink to verity the control objectives of MPPT, power factor adjustment and DC current minimization. The simulation results prove the feasibility of the proposed system that serves as an attracting alternative for high power WECS.

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Low Speed Directly Driven Permanent Magnet Synchronous Generators for Wind Energy Applications

Cited by 24 publications

References 1 publication

Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator

Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator

A Novel Cogging Torque Simulation Method for Permanent-Magnet Synchronous Machines

A novel configuration and control of CSI wind energy system with diode rectifier and buck converter

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