Recent content by AlexK

I strayed from SLA and bought a NiCd pack from ebikes.ca. It has always heated up when charging more than once per day and now one or more cells are going bad and I'm getting about 3AH out of the 8AH pack. It was supposed to last longer than SLA but my SLAs lasted 1700 miles, these NiCds only...

It is a high resistance path from the windings to the outside air. The hub motor relies on convection and conduction to get the heat from the windings to the outside surface. Since the only conduction path is through the bearings and axle, most if it probably happens through convection of the...

Hi guys, I have a few comments. I don't think a poor connection outside the motor would heat up a brushless DC permanent magnet motor. An AC induction motor maybe but that's not what we have here. A black surface will tend to both absorb more and emit more radiation than a silvery surface...

I got 1500 miles out of my no-name 36V, 12AH SLA pack. Now I am at 1200 miles on my 36V 8AH NiCd pack from ebikes.ca and its starting to dump after about 8 miles. I think NiCd/NiMH packs with so many cells do not work well without some kind of balancing or individual cell monitoring. I am...