damcard wrote:I ran mine at 72v for a little, but smoked it after pushing it for 5 miles. If I had been monitoring temps and backed off, I am sure it would have kept running fine. I guess I wanted to destroy it though because I was never happy with its performance. -Damcard
boostjuice wrote:The Cyclone planetary geared motors are wound for around 150Kv so at 48V they are already spinning at 7200RPM no load. Thats already pretty fast for their diameter class unless the core is balanced to a high level of accuracy (doubtful for the price they cost). One way to ballpark guess its longevity at higher voltages/RPM on the quick and easy would be to power it up in your hand with a variable voltage power supply without the gearbox attached and feel for increasing vibration. If vibration doesnt increase drastically at higher voltages then your probably alright.
the magnets in the core are held well via captive cutouts in the laminations, thus reducing the chance of centrifugal force causing magnet breakaway compared with a glued magnet core.
boostjuice wrote:Hi Ricky,
As for more voltage, I say go for it. Your set-up to test these better than anyone.
I've also thought about filling mine with light oil for cooling purposes. My thoughts are you'd want to fill the channels in the lamination stacks with epoxy and turn it down to a smooth cylinder to reduce unwanted drag. However, that brings up balancing issues as well as the epoxy detaching under centrifugal force long before the magnets break through their captive lamination cutouts.
It's a real shame there is no solid thermal path between the windings and casing on these motors. If the coils were vacuum filled with thermal epoxy like an Astro, ill bet they would handle considerably more power.
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