| 1. | This allows the variation of the rotor speed independent of generator speed.
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| 2. | Varying the rotor speed may induce severe vibrations at specific resonance frequencies.
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| 3. | It can also be seen from considering the torque-rotor speed diagram.
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| 4. | Here, the relative wind does not decrease; rather, it increases with rotor speed.
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| 5. | This type of aerodynamic noise is mostly low frequency determined by the rotor speed.
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| 6. | The rotor speed can either be increased or decreased by an appropriately designed controller.
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| 7. | To obtain higher frequencies, higher rotor speeds were required, up to 20, 000 RPM.
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| 8. | However, as the rotor speed increases, the noise levels increase.
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| 9. | In many piston engine-powered helicopters, the pilot manipulates the throttle to maintain rotor speed.
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| 10. | From the above equation, we can construct a torque-rotor speed diagram for a wind turbine.
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मोबाइल