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Yendor
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Joined: 26/02/2026
Location: Australia
Posts: 1

Posted: 01:18am 26 Feb 2026

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Thank for letting me join the forum. I have just had a 50kw battery installed which has 3 extra MPPT inputs on the inverter and my solar is only 5kw and struggles to charge it. Conveniently my LG washing machine broke last week which provided me with a 36 pole DC motor and joined your group to ask advice.
I wanted to rewire the stator, build a vertical wind turbine using 6 x 150mm PVC pipe halves and plug it into the MPPT inputs to help charge the battery.

Firstly, vertical wind turbine is the easiest to build and apparently quieter but unsure of measurements and potential RPM?

Secondly, which wiring configuration would be best suited for the turbine design?

I am possibly going down the wrong track but happy to receive any advice, recommendations or criticism .

Thankyou in advance.

Adriaan Kragten
Newbie

Joined: 14/10/2015
Location: Netherlands
Posts: 15

Posted: 03:51pm 26 Feb 2026

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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.

Adriaan Kragten
Newbie

Joined: 14/10/2015
Location: Netherlands
Posts: 15

Posted: 04:09pm 26 Feb 2026

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I have looked about what I could find about such motors and I found pictures of a motor with 36 stator poles. One curved magnet is opposed to three stator poles but this magnet must be magnetized such that it has four poles. There are totally twelve of those magnets. So the armature has totally 12 * 4 = 48 poles. As the armature pole number determines the pole number of the motor, this is a 48-pole motor and not a 36-pole motor. The number of preference positions for this motor is 3 * 4 * 12 = 144.
Edited 2026-02-27 02:13 by Adriaan Kragten

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