Re: [EVGRAY] help!

Body

Hi @lamaisonpescara

"...and does not have the strength that a 5.5 
 horsepower should have..."
The motor has to be derated when running in rotoverter mode according to Hector. It is probably overloaded if trying to run at nominal power.

Check if the rotor is damaged. Is the insulation between the laminated steel sheets in working order? The current has to run in the squirrel cage and not in the metal sheets.

Regards
Ole
 

---In [email protected], <info@...> wrote :

 Thanks Warren for the availability, ... I hope that Doug can help me, 
 the problem is that the engine runs at full speed, even with only 2 
 phases once it starts, without capacitors, and without load it absorbs 
 very little, 0.2 AMP, however, turning the rotor very warm (not the 
 stator with the windings), and does not have the strength that a 5.5 
 horsepower should have.
 
 
 
 
 
 "James Glinski jglinski01@... mailto:jglinski01@... [EVGRAY]" <[email protected] mailto:[email protected]> 
 ha scritto:
 
 > Send some pics of your set up .i t may help .
 >
 > On Thursday, June 27, 2019, Warren Keillor schoonersolsticemoon@... mailto:schoonersolsticemoon@...
 > [EVGRAY] <[email protected] mailto:[email protected]> wrote:
 >
 >>
 >>
 >> Hi Info
 >> Something is wrong.
 >> My WEG, once up to speed, will run
 >> even without capacitors in the circuit.
 >> I never ran it long like that, because I was always trying to get the
 >> current draw as low as possible.
 >> Now , I had better dig one of my Roroverters out of storage, and test that
 >> to see if if might, in that condition, heat up.
 >> I use a 140, or 120 uf motor start capacitor to get my motors turning at
 >> full 60 hz speed, before I begin my play with them, using my capacitor
 >> tuning boxes.
 >> As I said, I had difficulty finding oil filled high voltage, low value uf
 >> capacitors, which are what I have been using. I have not tried other types,
 >> as I scored a whole bin of these oil filled kind, in an old electronics
 >> surplus store in downtown Toronto, ( which has since moved to some suburban
 >> industrial area miles out of downtown) The oil filled, are not common, but
 >> are not perhaps the only kind that work. They are only my experience, as I
 >> was new to Roto Verters, and trying to get my first one going, just to test
 >> this voodoo crazy thing Hector, and Doug, were doing.
 >> My emotions were high when the big lump of cast iron motor ran full speed,
 >> just as they said it would.
 >> I found myself running this mass on a tiny speaker wire of 26 gauge, just
 >> to prove to myself, I was not hallucinating- and my amp meters were
 >> mis-reading the draw of 200ma. at 110 volts 60hz AC.
 >> Once the magic full speed rotation happens with that 140uf cap, it was
 >> taken out of the start circuit, and the motors keep running, whether with
 >> grease, and seals or not.
 >> The one with seals, and grease uses 400ma of current, while removing the
 >> seals the other motor uses 200 ma.
 >> Both motors were brand new,, when I got them as surplus movie props from
 >> Del Toro's "Pacific Rim"
 >> It was cheaper to buy these real ones from China, than to have me make
 >> fake ones out of foam plastic, for a giant industrial scene in the movie.
 >> After the movie, I bought a pallet of these motors at the props sale. No
 >> one else wanted them as they were 480 volt three phase, and no one has that
 >> voltage in their homes and ordinary workshops here in Canada. They are in
 >> the realm of heavy industries only, outside the core of major cities, in
 >> industrial zones, with their special electrical sub stations pulling power
 >> from the main transmission grid. People buying at film prop sales don't
 >> buy for such heavy industries, or is it usual for film companies to buy the
 >> real thing new. I was just lucky to be working on this giant 200 million
 >> dollar budget film, with a director who likes the real stuff when possible.
 >> They bought containers of stuff from China, for scenes in the film.
 >> It was less trouble than shooting in China.
 >> That's the only reason I got my curious little hands on new motors, that
 >> never had to do anything except look pretty, as part of some giant robot.
 >> I don't spend a lot of money on my experiments. Hundreds have ended in
 >> failures, or miserable complicated contraptions that barely show any
 >> promise of running themselves.
 >> Hector, in spite of his flamboyant language sometimes, redeemed himself
 >> with this device, his Rotoverter. It works magic.
 >> At least, in my tests,1.614 times over unity. (Hector claims 1.618. I have
 >> more to improve)
 >> You are having a problem with yours, I have never experienced
 >> Ask others in this group. Doug is reliable, and has a lot more experience,
 >> than I have, with this device.
 >> Cheers Warren
 >>
 >> ent from Yahoo Mail on Android
 >> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
 >>
 >> On Thu., 27 Jun. 2019 at 2:41 a.m., info@... mailto:info@... [EVGRAY]
 >> <[email protected] mailto:[email protected]> wrote:
 >>
 >>
 >>
 >> Hi, I wanted to thank all the guys who answered me to try to help me
 >> solve problems with a rotoverter. The variac has arrived, but even if
 >> placed at 1/4 of the current foreseen in connection to Y, the thing
 >> does not change, the rotor turning without load heats up, the current
 >> consumption is low, about 0.5 amp. which increases if the capacitor
 >> microfarads increase, and the power is low .... the only doubt I have
 >> left is the capacitors ... they are the normal ones for AC that they
 >> sell in electronics stores, and not the old ones in oil bath ...
 >> that's the problem ...? Has anyone ever done the same?
 >>
 >> info@... mailto:info@... ha scritto:
 >>
 >> > Hi everyone, I'm new to the group and first of all I wanted to thank
 >> > everyone for their kindness. I have a problem with a rotoverter. The
 >> > motor is a three-phase 5,5horse, 50 hertz (I am in Italy), 4
 >> > windings. 690v star connection. 1440rpm per minute (the engine can
 >> > even go up to 60 hertz with 830V and 1730 revolutions is shown on
 >> > the plate) Now I am testing it with the 220v 50herz rotoverter
 >> > system, but I saw that it has little force and the rotor (cage)
 >> > squirrel) warms up a lot ..... how come? ... I bought a variac to
 >> > bring the voltage to 1/4 (172 volts) and I'm waiting for it to
 >> > arrive, but is that just the problem or else? ...... Thank you so
 >> > much for helping me out.
 >>
 >>
 >>