Joined
·
239 Posts
Hi,
I've torn down motors big enough to push my station wagon and was wondering what percentage of their weight could be lost with composite outside shell for the stator core and composite end bells to hold the bearings?
A pair of metal rings laid-up in the glass can hold the bearings with the added side benefit of eliminating stray shaft currents generated by the AC drive. For a given speed motor there must be a nominal magnetic circuit weight per N.M. of torque. The motor no doubt would be a little bulkier in order to accommodate generous cooling air ducting. I've cast aluminum before but for one-offing composite layup would be easier.
I've torn down motors big enough to push my station wagon and was wondering what percentage of their weight could be lost with composite outside shell for the stator core and composite end bells to hold the bearings?
A pair of metal rings laid-up in the glass can hold the bearings with the added side benefit of eliminating stray shaft currents generated by the AC drive. For a given speed motor there must be a nominal magnetic circuit weight per N.M. of torque. The motor no doubt would be a little bulkier in order to accommodate generous cooling air ducting. I've cast aluminum before but for one-offing composite layup would be easier.