1/5-1/2 hp perm magnet motor
1/5-1/2 hp perm magnet motor
(OP)
We are using 24VDC solar power to pump 50/50 glycol-water at remote well locations. We could increase the source voltage to 48V but I'm trying to stay away from anything higher and do not want to go to AC inverters. The calc hp requirements vary from 1/5 to 1/2 hp. They run in a fairly harsh environment, mostly in the winter (-38 deg F last week). We're testing a 24V Bodine motor/controller driving an Oberdorfer gear pump currently, but apparently will have to go to another supplier for anything above 1/4 hp. I'm looking to capitalize on others' experience or a suggestion where I might find the larger motors, preferably 48V to lower line losses. I tried a keyword search to no avail, so thanks in advance for any suggestions.





RE: 1/5-1/2 hp perm magnet motor
AO Smith
Baldor
Leeson
MicroMo
Moog
to name a few. Also http://www.globalspec.com/
Good luck....
RE: 1/5-1/2 hp perm magnet motor
Wouldn't an inverter let you use way cheaper and more efficient motors and to do other things like speed control and use cheaper wire?
Can you say more about what you're doing?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 1/5-1/2 hp perm magnet motor
The DC motor we're testing does have speed control that can be monitored and adjusted via a DCS system without any other equipment.
The glycol-water is heated by a production unit, then used as heat trace to keep lines thawed out.
RE: 1/5-1/2 hp perm magnet motor
http://www.pacsci.com/products/pmdc/index.html
RE: 1/5-1/2 hp perm magnet motor
But I don't think that DC motor+velocity amp+AC/48VDC converter would be cheaper vs AC motor+Inverter.
RE: 1/5-1/2 hp perm magnet motor
RE: 1/5-1/2 hp perm magnet motor
RE: 1/5-1/2 hp perm magnet motor
$99 bucks.. Of course you need 120VAC in, so you would still need to use an inverter. But they are dirt cheap these days.
Perhaps if they are packaged in a safe manner the electrician aspect could be minimized.
While I could build exactly what you're after - If I were faced with the same task, I would try to "off-the-self" the package as then you can learn about the application further.
It would still seem to me that using a small OTS 3ph motor would really save a lot of $$. I could be wrong as perhaps small BLDCM might cost less, though I somehow doubt it.
If the equipment really has to run at -40C you will need to design what you want from the ground up. ouch!
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 1/5-1/2 hp perm magnet motor
That might be a source for your motor.
RE: 1/5-1/2 hp perm magnet motor
We've got two science projects going now, one more won't hurt--especially when considering we'll eventually be doing this to 450 locations.
You've been very helpful, thanks a lot.
RE: 1/5-1/2 hp perm magnet motor
Please keep us informed of your results.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 1/5-1/2 hp perm magnet motor
If you want to use a brushless servo motor, you will need feedback -- probably hall commutation sensors -- and a drive that can use this. An induction motor would not need any feedback.
I have seen several applications for cold ambient conditions where the enclosure for the drive contains a heating element (sometimes a motor shunt resistor is used for this purpose) that warms up the enclosure to start -- then the drive's own heat can keep things warm enough after that.
Curt Wilson
Delta Tau Data Systems
RE: 1/5-1/2 hp perm magnet motor
Was that thing you saw a manual thing?
Turn on box power. Wait 2 hours... ?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com