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A compact, high efficiency contra-rotating generator suitable for wind turbines in the urban environment

Author

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  • Booker, J.D.
  • Mellor, P.H.
  • Wrobel, R.
  • Drury, D.

Abstract

This paper is concerned with the design, development and performance testing of a permanent magnet (PM) generator for wind turbine applications in urban areas. The radially interacting armature windings and magnet array are carried on direct drive, contra-rotating rotors, resulting in a high torque density and efficiency. This topology also provides improved physical and mechanical characteristics such as compactness, low starting torque, elimination of gearboxes, low maintenance, low noise and vibration, and the potential for modular construction. The design brief required a 50kW continuous rated prototype generator, with a relative speed at the air-gap of 500rpm. A test rig has been instrumented to give measurements of the mechanical input (torque and speed) and electrical output (voltage, current and power) of the generator, as well as temperature readings from inside the generator using a wireless telemetry device. Peak power output was found to be 48kW at a contra-rotating speed of 500rpm, close to the design target, with an efficiency of 94%. It is anticipated that the generator will find application in a wide range of wind turbine designs suited to the urban environment, e.g. types sited on the top of buildings, as there is growing interest in providing quiet, low cost, clean electricity at point of use.

Suggested Citation

  • Booker, J.D. & Mellor, P.H. & Wrobel, R. & Drury, D., 2010. "A compact, high efficiency contra-rotating generator suitable for wind turbines in the urban environment," Renewable Energy, Elsevier, vol. 35(9), pages 2027-2033.
    • Handle: RePEc:eee:renene:v:35:y:2010:i:9:p:2027-2033
    DOI: 10.1016/j.renene.2010.02.003
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    References listed on IDEAS

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    1. Jung, Sung Nam & No, Tae-Soo & Ryu, Ki-Wahn, 2005. "Aerodynamic performance prediction of a 30kW counter-rotating wind turbine system," Renewable Energy, Elsevier, vol. 30(5), pages 631-644.
    2. Baroudi, Jamal A. & Dinavahi, Venkata & Knight, Andrew M., 2007. "A review of power converter topologies for wind generators," Renewable Energy, Elsevier, vol. 32(14), pages 2369-2385.
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    Cited by:

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    2. Radu Saulescu & Mircea Neagoe & Codruta Jaliu, 2018. "Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems," Energies, MDPI, vol. 11(9), pages 1-33, August.
    3. Mircea Neagoe & Radu Saulescu & Codruta Jaliu, 2019. "Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators," Energies, MDPI, vol. 12(9), pages 1-19, May.
    4. Nikolić, Vlastimir & Petković, Dalibor & Shamshirband, Shahaboddin & Ćojbašić, Žarko, 2015. "Adaptive neuro-fuzzy estimation of diffuser effects on wind turbine performance," Energy, Elsevier, vol. 89(C), pages 324-333.
    5. Michał Pacholczyk & Dariusz Karkosiński, 2020. "Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine," Energies, MDPI, vol. 13(15), pages 1-17, July.
    6. Mircea Neagoe & Radu Saulescu & Codruta Jaliu & Petru A. Simionescu, 2020. "A Generalized Approach to the Steady-State Efficiency Analysis of Torque-Adding Transmissions Used in Renewable Energy Systems," Energies, MDPI, vol. 13(17), pages 1-18, September.
    7. Alnasir, Zuher & Kazerani, Mehrdad, 2013. "An analytical literature review of stand-alone wind energy conversion systems from generator viewpoint," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 597-615.
    8. Lidong Zhang & Kaiqi Zhu & Junwei Zhong & Ling Zhang & Tieliu Jiang & Shaohua Li & Zhongbin Zhang, 2018. "Numerical Investigations of the Effects of the Rotating Shaft and Optimization of Urban Vertical Axis Wind Turbines," Energies, MDPI, vol. 11(7), pages 1-25, July.
    9. Manganhar, Abdul Latif & Rajpar, Altaf Hussain & Luhur, Muhammad Ramzan & Samo, Saleem Raza & Manganhar, Mehtab, 2019. "Performance analysis of a savonius vertical axis wind turbine integrated with wind accelerating and guiding rotor house," Renewable Energy, Elsevier, vol. 136(C), pages 512-520.

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