Finite element analysis of a wind generator with two counter-rotating rotors

Melcescu, Leonard; Tudorache, Tiberiu; Craiu, Ovidiu; Popescu, Mihail

doi:10.1109/optim.2017.7975004

Cited by 10 publications

(7 citation statements)

References 10 publications

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“…With load variation, the voltage regulation factor is expressed as [6, 7]

\begin{equation}U\ = \left( {\frac{E}{{{V_o}}} - 1} \right)\ 100\% \end{equation}

…”

Section: Performance Analysismentioning

confidence: 99%

“…In regard to wind turbine energy conversion efficiency, different techniques have been investigated over decades, among which improvement in wind turbine power coefficient played a vital role; however, as per wind turbine theory, maximum power extracted from the wind turbine is limited by Bet'z law [6], which compels researcher to sort out alternate methods for enhancement in wind energy conversion efficiency, especially towards generator and turbine structure.…”

Section: Introductionmentioning

confidence: 99%

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Dual mechanical port power distribution in dual rotor permanent magnet flux switching generator for counter‐rotating wind turbine applications

Ullah

Khan

Hussain

2022

IET Renewable Power Gen

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In this paper, a novel dual mechanical port dual rotor counter-rotating permanent magnet flux switching generator (DMPDRCR-PMFSG) for wind turbine applications is proposed. Power distribution between the inner and outer rotors of the proposed DMPDRCR-PMFSG that contributes to the cumulative output power is investigated. The proposed DMPDRCR-PMFSG shares a stator connected back-to-back through flux bridge. The flux bridge physically isolates the armature winding of the inner and outer ports. Furthermore, the flux bridge provides a flux path to magnetic flux of the inner and outer ports that contributes to cumulative output power. Quantitative comparative analysis of the inner and outer ports illustrates that under static analysis 18.57% more flux, 23.95% highly induced back-EMF, 31.08% of enhanced average torque are obtained in the outer rotor at the cost of 64.01% and 22.7% increase in cogging and torque ripple ratio, respectively. Comparative analysis with a number of turns reveals that the outer port offers 41.17% higher output power and 7.09% improved efficiency at the cost of 42.52% increase in voltage regulation factor. Finally, coupled overload and over-speed analysis shows that despite a stable and low voltage drop ratio, the outer port offers 4.65% higher output voltage. Analysis shows that in the proposed DMPDRCR-PMFSG, the outer port has a dominant contribution to the cumulative power distribution.

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“…With load variation, the voltage regulation factor is expressed as [6, 7]

\begin{equation}U\ = \left( {\frac{E}{{{V_o}}} - 1} \right)\ 100\% \end{equation}

…”

Section: Performance Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual mechanical port power distribution in dual rotor permanent magnet flux switching generator for counter‐rotating wind turbine applications

Ullah

Khan

Hussain

2022

IET Renewable Power Gen

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“…The idea of counter rotation in three phase synchronous generator (SG) was proposed in [25] whereas wind turbine with counter rotation utilizing permanent magnet synchronous generator (PMSG) is developed in [26]. Furthermore, doubly-fed induction generator (DFIG) is proposed in [27] for wind turbine with counter rotation, whereas author in [28] investigates counter rotation by coupling three armatures with outer stator and two rotors however, the aforesaid SG, PMSG and DFIG suffer from production cost and bigger in size than usual for direct-drive wind turbine applications [29]. The afore-said demerits of DFIG, SG and PMSG are incorporated in double-stator PMFSG utilizing counter rotation wind power application [30][31].…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual Rotor Permanent Magnet Flux Switching Generator for Counter Rotating Wind Turbine Applications

2022

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In this paper counter rotating (CR) dual rotor permanent magnet flux switching generator (CR-DRPMFSG) is designed and relatively studied with co-rotating DRPMFSG (CoR-DRPMFSG) for wind turbine applications. The developed CR-DRPMFSG and CoR-DRPMFSG share same stator linked with flux bridge which provide flux route. A comprehensive relative assessment of both CR-DRPMFSG and CoR-DRPMFSG are presented with static attributes, over-load, and over-speed capability for generating output voltage, output current, output power, power density, losses, and efficiency. Comparative study with static characteristics illustrates that developed CR-DRPMFSG shows 34.34% elevated phase flux which improve output power, cumulative output torque is improved by 23.86%, and suppressed cogging torque by 66.87% at CoR-DRPMFSG that results lower pulsation in instantaneous torque. Furthermore, a detailed performance analysis is investigated with different number of armature winding turns per phase and combined over-load and over-speed capability. Study discloses that in contrast with CoR-DRPMFSG counterpart CR-DRPMFSG offer 27.17% higher output power that results 1.25 times power density at a good voltage regulation factor of 18.67%. In additional, despite of 2.27% improvement of efficiency in case of turns analysis and 4.81% increase in overload and overspeed capability, contour efficiency map unveils that CR-DRPMFSG offer wide range of higher efficiency operating region during over-load and over-speed conditions accompany with stable voltage with the varying load profile. INDEX TERMSFlux switching machines, Ferrite permanent magnet, counter rotation, wind turbines, Wind power generator, Wind power application I.

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“…Melcescu et al (2017) present a design of a wind generator with two counter-rotating rotors and estimated his behaviors using FE software package flux.…”

Section: Introductionmentioning

confidence: 99%

“…He succeeds in reducing the cost of the production and improving the structure. Melcescu et al (2017) present a design of a wind generator with two counter-rotating rotors and estimated his behaviors using FE software package flux.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of permanent magnet synchronous generator dedicated to direct-drive, high power wind turbine

et al. 2021

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This paper presents analysis, design, and optimization of a high-power permanent-magnet synchronous generator (PMSG). This generator is introduced in a large-scale wind turbine which can be used in a big wind farm. This generator is used in gearless configuration. The work focuses on the geometric sizing and the finite element analysis (FEA) of the PMSG. FEA is a good choice for analyzing problems over complicated domains. The flux, the electromotive force, the cogging torque, and the torque are calculated using analytical equations. Then, these parameters are obtained using finite element method (FEM) in the software FEMM and the compared with analytical results in order to validate our study. The second part presents the formulation of the optimization problem, including the optimization space, constraints, and objectives. The genetic algorithm (GA) is adopted in this design optimization in order to minimize the generator cost.

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Finite element analysis of a wind generator with two counter-rotating rotors

Cited by 10 publications

References 10 publications

Dual mechanical port power distribution in dual rotor permanent magnet flux switching generator for counter‐rotating wind turbine applications

Dual mechanical port power distribution in dual rotor permanent magnet flux switching generator for counter‐rotating wind turbine applications

A Novel Dual Rotor Permanent Magnet Flux Switching Generator for Counter Rotating Wind Turbine Applications

Design and optimization of permanent magnet synchronous generator dedicated to direct-drive, high power wind turbine

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