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Forum Index : Windmills : review report KD 747

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Adriaan Kragten
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Joined: 14/10/2015
Location: Netherlands
Posts: 32

Posted: 11:38am 24 Oct 2026

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My public report KD 747, in which it is described how a 6-pole asynchronous motor can be transformed into a PM-generator, has been reviewed. A new picture 5 of a 42-pole PM armature turning into a stator housing with 54 slots and so 54 mechanical poles, has been added to chapter 7. Because of this combination of number of armature and stator poles, the generator has 378 very small preference positions per revolution. Therefore it has a very small peak on the cogging torque which results in a low starting wind speed if the generator is used in combination with a wind turbine rotor with a diameter of 5 m and a design tip speed ratio of 6 or 6.5. KD 747 can be copied for free from my website: www.kdwindturbines.nl at the menu KD-reports.

https://www.kdwindturbines.nl

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