12 Volt Ball Bearing Fan With Some Oomph (link)

I have to watch my left hand especially with the space bar and left side of the keyboard*. Thanks for correcting the error wa8yxm. The motor in question is a Pabst ball bearing type.

*Holding things, soldering, knife & fork it makes for an interesting life :)

wa8yxm wrote:

MEXICOWANDERER wrote:

Permanent magnet no brushes

That would be an oxymoron, PM motors ALWAYS have brushes.

This is not a PM motor.

It's brush less permanent mag. I have broken them open before. We would use 2 12 inch diameter fans like that to blow down on the batteries in electric fork trucks to aid in cooling. We used what they called Rapid Charge at 500 amps so there was always heat. The drivers didn't like hearing the fans so they would jab a pencil or plastic fork in them to stop them and usually you could remove it and they would take off. I know they dont like power washers. Many things like starter motors have permanent magnets and brushes.

At the end of my career we were working on electric fork lifts that ran a 48 volt 4500 pound battery powering a GE controller that changed dc to ac and ran a brushless 3 phase ac drive motor. It eliminated the high armature current draw when the drivers would try to bulldoze loads instead of lifting the load. More short cuts/more newspaper time.

On the dc drive trucks previous to that they ran brushes and excited the field with 10 gauge wire. 3/0 to the armature and 10 gauge to the field because the GE controller pulsed the field current, non series motor. Problem was that when stalled the armature amperage skyrocketed and would swell the armature resulting in raised commutator segments the brushes would click like crazy. It sucked bad changing 600 pound drive motors.

They were supposed to be an improvement over series dc motors powered by scr systems but the weakest link was the GE SEM separately Excited Motor controller. They were $1,700 and we had a couple pallets of them waiting to be shipped out all the time. Probably 30 per pallet. I referred to them as the $1,700 fuseable link.

That style fan is also available in ac brushless

MEXICOWANDERER wrote:

Permanent magnet no brushes

That would be an oxymoron, PM motors ALWAYS have brushes.

This is not a PM motor.

MEXICOWANDERER wrote:
A medical grade defibrillator used to be heartbreakingly expensive. The ones they have now are for the general public to use. Connect the leads, press a button and wait. I resist looking at the price. It is beyond the ability of my social security budget, I'm sure. Rather than weep, I do what I can.
b

my HOA bought one to store at the central shelter. don't remember the cost but it was within reason.
bumpy

A medical grade defibrillator used to be heartbreakingly expensive. The ones they have now are for the general public to use. Connect the leads, press a button and wait. I resist looking at the price. It is beyond the ability of my social security budget, I'm sure. Rather than weep, I do what I can.

Don't chuckle, capacitors, any capacitors are treasured around here. The bigger the better. What am I saying? KEPS nuts, GOOP adhesive, 20M 1/2 watt resistors, they are all impossible dreams. BTW the MINIMUM cost of a tiny envelope worth of stuff is like ninety dollars via DHL. I have to rely on friends who go north once in awhile. The converter would have cost 380+ dollars to ship only to start a massive squabble with Mexican Customs duty.

When I hobble down the street and a person not well known to me comes up, grabs my hand and shakes it and pats me on the back then says "We want you to come to our little fiesta on Saturday" I get little attacks of allergy. Damned eyes...

I sent seenyore rjxj a private message.

MEXICOWANDERER wrote:
Absolutely rjxj. The heat and humidity make things miserable for the patient and the doctor. It's only a single room with the north wall lined with shelves. I need to scrounge up a plastic base for a fan motor that went to heaven then affix the new 12 volt fan atop the pedestal where the old fan used to be. It'll come on with the lights.

I ordered a 12 volt motion detector eyeball and am going to fit a 10 watt LED chip and heatsink up high (actually someone else has to do the work) so late night arrivals will have outside door lighting. Having that PD donation changes things. I am going to save up for a 2nd group 27 ciclo profundo and add another 30 watt LED inside. A dream is getting a defibrillator. One thing at a time.

Where do you want me to send the fan? What's the shipping address?

Defibrillator? I have one of those oval capacitors from a battery charger that I used to charge up and leave laying around for one of the ties to pick up and touch. :)

Heck you can build yer own!!!!

How much is defib?

63 db, isn't that about what the generators run that are fussed at for being too loud?
bumpy

Absolutely rjxj. The heat and humidity make things miserable for the patient and the doctor. It's only a single room with the north wall lined with shelves. I need to scrounge up a plastic base for a fan motor that went to heaven then affix the new 12 volt fan atop the pedestal where the old fan used to be. It'll come on with the lights.

I ordered a 12 volt motion detector eyeball and am going to fit a 10 watt LED chip and heatsink up high (actually someone else has to do the work) so late night arrivals will have outside door lighting. Having that PD donation changes things. I am going to save up for a 2nd group 27 ciclo profundo and add another 30 watt LED inside. A dream is getting a defibrillator. One thing at a time.

So this fan is for something in the hospital?

Hard to beat a Pabst fan for durability.