Single-phase to 3-phase AC motor conversion

Sputnik

1 mW
Joined
Mar 12, 2008
Messages
13
Location
South Africa
We had this old electric lawnmower. I don't remember what went wrong with it, but it was given to me to destroy. I want to use it as a motor for a potential e-bike conversion, and figured three-phase would give me more power and speed control. So I decided I'd attempt to rewind this motor for 3-phase power since it would also prove to be an intriguing endeavour.

This is the 1800W single-phase AC motor from the lawnmower.
Image491.jpg


Here's the stator.
IMG_6566.jpg


Here you can see there are 24 slots so it will be possible.
IMG_6567.jpg


Currently all the windings have been removed and I'm on the look out for new copper. My options are quite limited :(. The original primary winding was 0.8mm and the auxiliary winding was 0.7mm. I'm thinking I should use 1mm diameter wire if I am to use a voltage lower than 220V to drive it. Any opinions?

Also, should I wind for four poles or eight poles? I know eight poles will be half the speed of four poles for a given drive frequency, but will it have more torque?

Thanks,
Sputnik :idea:
 
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