Newbie
Joined: 14/10/2015
Location: NetherlandsPosts: 31
| Posted: 03:51pm 26 Feb 2026 |
If you wan to start with a VAWT lift machine, I advise you first to read my report KD 215 and KD 601. These reports can be copied for free from my website: www.kdwindturbines.nl at the menu KD-reports. I don't know exactly what generator you want to use but I suppose that originally it is a direct drive motor. This is a 3-phase AC motor but in the washing machine an inverter is used which suplies a 3-phase current with a varying frequency. These kind of motors can be used as generator for a wind turbine but they have a large disadvantage. If it has 36 armature poles, I expect that it has 27 stator steel poles and that a coil is wound around each stator pole. The coil sequence is U1, V1, W1, U2, V2, W2 and so on. If one armature pole is just opposite a stator pole, you will get a preference position. You wil get 108 rather strong preference position per revolution and this results in a rather large peak on the cogging torque. The rotor starts only at the wind speed for which it can supply this peak. It depends on the type and diameter of the rotor if the starting wind speed is acceptable. I have designed a rotor for a wind turbine which makes use of a bicycle front wheel motor which also has a large peak on the cogging torque (see KD 745). For such a large peak, you need a rotor with a low design tip speed ratio and very wide blades with a large blade angle.