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Homebrewed Electricity => Wind => Topic started by: Adriaan Kragten on November 23, 2017, 03:42:45 AM

Title: Report KD 645 about 10-pole PM-generator available
Post by: Adriaan Kragten on November 23, 2017, 03:42:45 AM
The title of this report is: "Ideas about a 10-pole, 3-phase permanent magnet generator with a stator without iron in the coils, using 20 neodymium magnets size 50 * 20 * 10 mm and a housing of an asynchronous motor with frame size 80". The most important difference in between this 10-pole PM-generator and the 8-pole PM-generator as described in report KD 644 is that the stator is provided with a simpler 1-layer winding. KD 645 can be copied for free from my website: www.kdwindturbines.nl at the menu KD-reports.
Title: Re: Report KD 645 about 10-pole PM-generator available
Post by: Adriaan Kragten on November 29, 2017, 04:40:46 AM
A new chapter 6 "Alternative" has been added to KD 645. In this chapter it has been investigated what effect has a thin iron stator ring on the flux density in the coils. The iron ring is made out of the original stator stamping by removing the spokes. The total air gap is now much smaller and the flux density is substantially increased. As the stator has no poles, the sticking torque still won't fluctuate. So no starting problems can be expected.
Title: Re: Report KD 645 about 10-pole PM-generator available
Post by: joestue on November 29, 2017, 02:15:05 PM
I wonder what the cost would be to wire edm cut the teeth out of a stamping.

They could be bored out on a lathe but finish grinding and acid etch is probably needed to prevent the laminations from shorting together.