Quote:
Originally Posted by MPS1982
Target speed is 25mph. I am using sprockets and chain to drive a jack shaft which will have a 2in friction drive roller contacting the tire. I had considered pulleys and belt driving the rear wheel, but the ratio was too difficult to achieve. For reference, my rear wheel is 24in dia.
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Is it 24" rim diameter or 24" tire height?
If it is a 24" tire height being driven by a 2" diameter friction roller, you have a 12:1 gear ratio if the tooth count on the sprockets are the same.
That should give you 25 MPH when the motor is spinning at a whisper over 4200 RPM and standard speed series motors used in golf carts typically max out at about 3200 RPM with a 36V battery pack, so it might be a good idea to look for a high speed series motor if you are going to run at 36V, which is the max voltage for the 1204-009 controller.
Quote:
Originally Posted by MPS1982
Here's what I've come up with to run a shaft out of the open end of the motor. Currently this is a plastic 3d printed part but I have plans to make a mold of it and cast it in aluminum.
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Might want to look for a hybrid front bearing (Ceramic balls) since it will be within the magnetic fields produced by motor. (It will work fine with steel balls, just won't last as long due to eddy current erosion.)
Elegant solution for the blue thingy.