Homemade brushless motors

Here’s some cool looking homemade brushless motors made using some PC Hard drive parts and
power tools…. wow!

My first home-built outrunner motor from hard drive stators (Western Digital Caviar). Motor designation is 280-10-6 as it has a 28dia x 10mm long stator. I used 6 windings of 3-strand 0.35mm wire with a delta connection and a distributed winding pattern. It spins 12,300 RPM @ 23.3A with a 8×4 Graupner SLIM prop.

This 350-20 is the biggest motor I’ve built so far. The 12-tooth, 35mm stator is from a power tool and the 14 magnets are 20x6x2mm. This motor has a nominal rating of 600w, but can safely be pushed to 750W for short durations. A similar motor powers a friend’s Smith Miniplane built to the original SIG plans and gives it vertical performance.

2 Responses to Homemade brushless motors

1. Izl says:

   August 29, 2007 at 5:59 am

   How strong are they
2. girrrrrrr2 says:

   September 11, 2007 at 5:43 pm

   yes… what is the torque???