Universiti Teknologi Malaysia
Question
Asked 16th Aug, 2015
How can a magnetic field force be built around the blades of wind turbine to increase their spinning when wind speed drops?
I am working on effects of magnetic field on the speed of wind turbines. The initial starting torque requires high wind speed but when this is lacking, performance characteristics of turbine becomes minimal. I hope to minimize this problem in my research by inducing magnetic field around the blades. I need help on how this can be set up for optimum blade performance at lower wind speeds.
Most recent answer
Thank you immensely, Dr. Marek. I will look into that "maglev" and read more about it. I will get back to you after.
Popular answers (1)
Indian Institute of Technology Roorkee
D.C magnetic field in the same direction of rotation of metal blades, could enhanced the torque to be produced by turbine, and could be achieved series/shunt field winding in case of dynamo, or rectification would be needed if induction generator is supplying the load.
3 Recommendations
All Answers (8)
Indian Institute of Technology Roorkee
D.C magnetic field in the same direction of rotation of metal blades, could enhanced the torque to be produced by turbine, and could be achieved series/shunt field winding in case of dynamo, or rectification would be needed if induction generator is supplying the load.
3 Recommendations
Vestas Wind Systems A/S
If you want the blades to rotate in no-wind condition you simply use the generator as a motor. This is generally good for the main bearings life time and will only cost very little power from the grid. Using the earth's magnetic field or external coils would probably never work so don't spend your time on that subject.
Institute of Physics of the Polish Academy of Sciences
The movement of turbine's blades (I think they are metallic i.e. conductive) in fixed magnetic field may only be decelerated due to eddy currents, never accelerated. If the opposite were true than you wouldn't need the wind at all to generate electricity, isn't it?
Universiti Teknologi Malaysia
Thanks Dr. Gutowski. Your contribution is quite imminent. However, do you think a magnetic flux couldn't be arranged to influence the starting torque of a wind or water turbine? Is it not worthwhile investigating its effects if any? Please your advise will really help.Thank you sir, for your imminent submission.
Universiti Teknologi Malaysia
Thanks Dr. Gutowski. Your contribution is quite imminent. However, do you think a magnetic flux couldn't be arranged to influence the starting torque of a wind or water turbine? Is it not worthwhile investigating its effects if any? Please your advise will really help.Thank you sir, for your imminent submission.
Institute of Physics of the Polish Academy of Sciences
When turbine starting torque is a problem then, perhaps, magnetic bearings might be of some help. Unfortunately, I have no experience with such bearings and thus I cannot be more specific. You may also think about magnetic levitiation (aka maglev), but it seems impractical in relatively small devices, especially if superconducting materials are used.
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