Re: [EVGRAY] Re: Repulsion/induction motor

Body

Michael,
Thanks for your input on the IR motor.  I didn't know how good they were.
George

    On Saturday, 8 December 2018, 8:41:17 pm AEDT, Michael Cardiff [email protected] [EVGRAY] <[email protected]> wrote:  
 
     

I know a little about I R motors I about installing a switch to isolate the  brushes from the circuit to see if it would work as a generator but I never got around to it .  Anyway  IR motors  were still available in the late 70's but if I remember correctly the 5hp that we needed at time for a conveyor was close to 3000$ and was special order which was a hell of a lot coin at the time.My boss  said no way when he could buy  a 5 cap start motor for a few hundred $ We installed the new motor but it would only start with out a load ,we replaced that with a 7.5hp still no start we ended using a 10hp which still started hard but it worked ,but it was probably half the physical size and the price was less than a  1/3  of a 3hp R I.       I like to put them on compressors, In my opinion A 3hp IR will replace a 7.5 hp cap start any day of the week in hard start applications and the energy costs are way less. (eg:compressors) I have rescued lots of them from our local scrap yard and I only had a couple that were actually burned up and  could not repair with new brushes and bearings . The compressor I have in my shop was the largest head the Princess Auto sold and at 600 rpm  required a 5 hp.and at 800 a 7.5 hp. I run it with a 3 hp at 850rpm 120 psi on 140 off Draws 16 amps.