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(ET) novel motor use
- Subject: (ET) novel motor use
- From: James Leuba 937-767-9976 <leuba cncrepair com>
- Date: Mon, 28 Jun 1999 12:26:56 -0400
- Organization: http://www.cncrepair.com
- References: <199906211421.KAA28169@mailfw3.ford.com>
- Sender: owner-elec-trak cosmos5 phy tufts edu
Larry,
I assume you used the propulsion motor? What was the field current?
Larry Elie wrote:
>
> Scott, WHICH type of mower motor shell are you looking for? Most of the
> later ones are 4.5" dia, but
> one still needs to know which flange position (blade end of shell to
> flange). The "M" or mid-mount
> decks are at a different position than the front mounts.
>
> On the side, I tried a novel ET application over the weekend. My 3 HP,
> 2" centrifugal Jacuzzi
> irrigation pump threw a rod. The B&S engine was toast. Yep, you
> guessed it. I put a normal
> mower motor (3000 RPM @ ? torque) in the place of the B&S engine. I had
> to ream the coupling,
> the ET's shaft is 3/4" and the B&S was 5/8", and put some new holes on
> the bracket. Yes, the
> motor did drive the pump. I obviously exceed the torque rating by a
> fair amount; the thermal
> cutout was letting it engage for about 5 minutes, than disengaged for
> about 1 as it cooled. It
> was pumping about 60 gal/minute (the B&S is rated 140 at 3500 RPM).
> Unfortunately, the seal
> on the pump gave out after only about 6 hours (my fault, I didn't put
> the check valve back because
> I was trying to reduce the restriction and every 5 minutes the thing had
> to re-prime-- dry seals get
> HOT) from overheating. Oh, yes, the charger by itself at 20-22 amps was
> powering the pump, the
> motor draw was 25-30. Lets see; 30 amps at 36 V is 1080 watts, and 760
> would be 1 HP if the
> efficiency was perfect. My duty cycle was about 83 % so my guess is the
> motor is rated at about
> 1 HP.
>
> Larry Elie
>
> ----------
> From: Scott[SMTP:Ke4cua bellsouth net]
> Sent: Saturday, June 19, 1999 9:03 AM
> To: elec-trak cosmos5 phy tufts edu
> Subject: (ET) Schematics
>
> I have a full set of schematics and a couple sales brochures, if anyone
> is in need of a copy of a particular item let me know and I'll scan in a
> copy and email it out.
> I am in need of a motor case with magnets it tact of even just a magnet
> for a mower motor would be great.
>
> Scott
> Jax, Fl
> <<File: ATT00002.html>>
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