Field weakening control of pm generator used for small wind turbine application

Milivojevic, T. V.; Schofield, N.; Stamenkovic, I.; Gürkaynak, Yusuf

doi:10.1049/cp.2011.0174

Cited by 11 publications

(9 citation statements)

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“…Since the induced voltage of the generator increases with the speed, the use of flux weakening control restricts the AFPMSG output voltage at high speed. This consequently increases the maximum operation speed and should be fully investigated to determine its impact on any change in properties of the generator [36][37][38]. These investigations will form part of the future work.…”

Section: Resultsmentioning

confidence: 99%

Axial‐flux permanent‐magnet synchronous generator with coreless armature and non‐integral coil–pole ratio

Yang

Chan

et al. 2018

IET Renewable Power Generation

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This article presents a study on an axial-flux permanent-magnet synchronous generator (AFPMSG) with a doublesided rotor, coreless armature. The armature winding consists of non-overlapping concentrated coils and has a non-integral coil-pole ratio. It is shown that, with an appropriate choice of armature coil number to pole number, the fundamental winding factor of the AFPMSG can be made close to that of a full-pitched integral slot winding. The field distribution and load performance are computed for a prototype machine based on a two-dimensional, time-stepping finite element method. A study of the armature reaction effect of the coreless armature winding and the origin of torque ripple is also carried out. The computed voltage and current waveforms, as well as the load characteristics, are verified by practical experiments.

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Section: Resultsmentioning

confidence: 99%

Axial‐flux permanent‐magnet synchronous generator with coreless armature and non‐integral coil–pole ratio

Yang

Chan

et al. 2018

IET Renewable Power Generation

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“…The disadvantage of speed stall control is that the generator torque must increase to reduce the rotor speed above the rated wind speed. Therefore, the generator must provide a higher torque than the torque produced at rated power, which means the generator must be overrated [16] [17]. For the 10 kW wind turbine running up to a cut-out wind speed of 25 m/s, a generator and a converter with a rated power of 14.8 kW are needed to limit the power in high winds.…”

Section: B High Wind Speeds (Region Iii)mentioning

confidence: 99%

Performance and Structural Load Analysis of Small and Medium Wind Turbines Operating with Active Speed Stall Control versus Pitch Control

Samani

Kayedpour

Kooning

et al. 2019

2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE)

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The objective of this paper is to investigate the performance of pitch and active speed stall control, and their impact on the structural loads of small and medium wind turbines (SMWTs). Large wind turbines use blade pitching to limit the power at high wind speeds. For SMWTs, the cost and complexity of a blade pitching system are not justified, so that passive yaw, stall control, or a furling tail mechanism is used instead. However, the choice of a proper control concept is not straightforward for SMWTs. In this regard, it is important to take into account that the control strategy has a significant impact on the structural loads. Reducing the structural loads results in a longer lifespan and ensures the safe operation of the wind turbine in stormy wind gusts or fierce winds. In this study, a 10 kW wind turbine is operated with different control strategies to investigate the corresponding loads, both in uniform and turbulent winds. The simulation results show that controlling power around the rated value is feasible and stable for both control strategies. However, active speed stall control increases the bending moments at the blade root, while it lightens the tower base moments, in contrast to the pitch control.

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“…While the MPPT problem has been studied in depth [9–12], a few works have been reported on development of an overall control strategy which is applicable to both Region I and Region II [6–8, 13–19].…”

Section: Introductionmentioning

confidence: 99%

“…When the generator power reaches its rated limit at point B, the captured power should be limited to the rated value. Toward this end, there are two approaches [6, 17]: (a) reduction of the rotational speed while maintaining the power to the rated value (compare the path BC in Fig. 1 b ); (b) increase of the rotational speed while maintaining the power to the rated value (compare the path BC in Fig.…”

Section: Introductionmentioning

confidence: 99%

Overall power control strategy for small‐scale WECS incorporating flux weakening operation

Shafiei

Dehkordi

Farhangi

et al. 2016

IET Renewable Power Generation

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Field weakening control of pm generator used for small wind turbine application

Cited by 11 publications

References 0 publications

Axial‐flux permanent‐magnet synchronous generator with coreless armature and non‐integral coil–pole ratio

Axial‐flux permanent‐magnet synchronous generator with coreless armature and non‐integral coil–pole ratio

Performance and Structural Load Analysis of Small and Medium Wind Turbines Operating with Active Speed Stall Control versus Pitch Control

Overall power control strategy for small‐scale WECS incorporating flux weakening operation

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