Here is an invitation from Adriann Kragten to test his design ideas and develop a pumping wind turbine project. Please note that Adriaan has never built an axial flux generator, so these instructions are not like my Recipes which are based on decades of experience, but the document is very rigorous and mathematical, and covers every theoretical detail. Adriaan has a designed many successful wind turbines based on induction motors as can be seen on his site. This is a great opportunity to work with an expert.
“Up to now, 17 public KD reports about different aspects of small windmills can be copied for free from my page on the website of Bidnetwork: http://www.bidnetwork.org/en/member/adriaankragten. The most recent report is KD 531: “Ideas about a 16-pole, 3-phase axial flux permanent magnet generator for the VIRYA-3D2 windmill using 16 neodymium magnets size 50 * 15 * 15 mm”.
In KD 531, a new idea is described how water can be pumped by a windmill. The windmill has a multi pole direct drive axial flux PM-generator and a fast running steel rotor with only two blades. The pump has a standard 3-phase asynchronous motor. For the VIRYA-3D2, the windmill has a 16-pole generator and the pump has a 0.75 kW motor. The same idea is described in report KD 529 for the bigger VIRYA-3.9 windmill which has a 22-pole generator and is meant for a pump with a 1.1 kW pump motor.
Although the multi pole generator is specially designed for connection to the 3-phase motor of a centrifugal pump, it can also be used for battery charging if it is provided with a low voltage winding and if the 3-phase current is rectified.
Public report KD 490: “Water pumping with a windmill” has been modified such that this new idea is now incorporated in chapter 5.
At this moment I have no intention to build and test a windmill with a multi-pole axial flux generator but I will support someone who is willing to test this new idea of water pumping.