Quote:
Originally Posted by mechman600
I cannot justify buying a new, bigger motor. So I will install forced cooling. I am thinking of using a marine bilge blower like this: Bilge Blower Buy 1 Get The Second 1 Free 12VDC 3" Opening | eBay
It is 12V, 3A, 90 CFM. EVSource has a similar one that puts out 105 CFM but for a lot more money. But I can't decide how I will switch this fan on/off. Two options I am throwing around are:
1. Epoxy a 165F (or so) thermal switch to a brush. The cooling fan will turn on once the brush reaches 165F and turn off if it drops to 15F below that.
2. Switch the fan on/off with my [currently unused] pot box idle microswitch. The fan will turn on as soon as the accelerator is depressed. This is a much simpler solution, and the one I am leaning towards |
36 Watts is an awful lot just to move 90 CFM. Any
120mm PC cooling fan will put out more CFM at 1/10 the power and half the cost. You would have to construct the method of ducting.
What about external ducts that draw air in while moving and direct it over the motor?
#2 switch solution sounds ideal, since simple often means better. With a more efficient cooling fan, it wouldn't matter if it runs a little more than it needs to.