Alternative winding for K645 stator

Adriaan writes: “I have added a new chapter 6 to report KD 645 in which a 10-pole PM-generator is described using the housing and shaft of an asynchronous motor frame size 80. This generator has a stator with no iron in the coils. The tittle of this new chapter is: “Alternative winding with 15 coils”. The original winding is a 1-layer winding with six coils which are laid in twelve outside grooves milled in the Delrin stator bush. The alternative winding has fifteen coils which are laid in thirty, 8 mm holes which are drilled in the Delrin stator bush but this requires a totally different way to lay the winding. De Delrin bush is much stiffer for holes than for grooves so it can be pressed in the aluminium motor housing. I think that more copper can be laid in 30 holes than in 12 grooves and so the winding is more effective. I picture of the original winding is given in figure 1 of KD 645. A picture of the alternative winding is given in figure 3 of KD 645.

KD 645 can be copied for free from my website: at the menu KD-reports.”

Adriaan would be delighted to hear from anyone who wishes to build prototypes. He has a lifetime of experience in the field of small wind turbine design but lacks facilities to do this practical testing at present.

About hugh

I live off-grid in NW Scotland and have spent my life playing with wind turbines. I also love small hydros. Hands on renewable energy is my thing and I like to learn and to share my experiences.
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