Body
Warren,
Perhaps you could use this motor as a motor/gen in one. Just throw on a
PWM speed control and tune for load. But more likely just use two of
them, one with the motor and one for the gen with the PWM and a
transmission between the two so you can define the differential you
would need for the sweet spot.
Not sure the type of motor Hector is referring to a DC with DELTA...
On 1/22/2019 11:17 PM, Warren Keillor [email protected]
[EVGRAY] wrote:
>
>
> Hector
>
> Just before you again, skip off, into silence, I have asked you
> questions regarding this, you never responded to.
> I have some interesting dc motors that have double commutators, and
> brushes. The commutators have a lot of segments on each.
> They share the same set of four magnets, but there are brushes coming
> out either end.
> I have been able to wire them in series and also parallel for more
> amperage or more voltage.
> You are suggesting a whole new game with using these motors.
> I'll fish one out, and take some pictures, to see what you can make of
> it. This might be a ready made magical motor.
> Cheers Warren
> Sent 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>
>
> On Tue, 22 Jan 2019 at 11:14 AM, [email protected] [EVGRAY]
> <[email protected]> wrote:
>
>
> PM dc motors can be rewired to WYE from its customary DELTA wiring
> and a second set of brushes used to Recover the reverse pulse into
> a capacitor across a diode bridge. simply you cut one wire
> segments from the brushes that have 2 wires in delta in one
> direction and solder into a wire ring ( any number of brushes )
>
> with no self shunting will work ou ..... at X speed (sweet spot)
>
> not the first time i post this , and still no one had commented on
> it ....
>
> its so fucking simple to experiment with a dc 12v car PM dc motor .
>
> the hardest part will be to place extra set of collector brushes
> but is not so hard as building
>
> a wachumacallit little school brat toy motor !
>
> (H)
>
> PS why not stop going back to the bullshit toys ?
>
>
>
> ---In [email protected], <schoonersolsticemoon@...> wrote :
>
> Doug
> If we are experimenting to find a speed, nothing is easier than a
> dc motor run by a variac.
> Once the magic sweet rpm is found, it is fairly simple to note
> that rpm and then with pulleys and belts use a fixed rpm ac motor.
> Now my question concerns the RV running as a motor. It takes a
> certain horse power to turn the generator shaft at a speed, even
> without a load on the generator, and friction with belts and pulleys.
> What I am curious about is delivering that specific load, with
> whatever device, and comparing an RV driving that load at a
> certain draw, and for instance a permanent magnet motor draw for
> that same load, comparing them with numbers indicating relative
> efficiencies.
> I told you how I have run my drill press on the boat using 12
> volts and a weenie 300 watt inverter that I have never blown the
> breaker on, even drilling 1" holes in stainless plate! The little
> belt on the drill press may slip, but that motor doesn't even know
> there is a load , hardly.
> It is a very practical system to use involving a 5 amp Variac run
> by the 300 watt inverter (120 v 60hz) and a bridge rectifier, a
> double pole, double throw, switch, and to the motor.
> I change the speeds with either the belt, or the knob on the
> Variac, using the drill press for everything from router, using
> carbide cutters, for aluminium, or teak, using vertical milling
> cutters, and cross slide vise for cast iron machining, high speeds
> with wire brushes for polishing metal, or grinding with grind
> stones, rotary files etc.
> Oh, and I also drill holes with it.
> 300 watts does it just fine for everything, using a cheap
> Taiwanese cast iron drill press, that was under $100, with the ac
> motor changed for a permanent magnet Dayton 5/8" shaft ordinary dc
> motor of perhaps 90 volts nominal used for computer tape drives,
> and bought for scrap.
> I have lots of unemployed RV motors too.
> I am curious to get this right, and sort out what is making the magic.
> Cheers Warren
>
>
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>
> On Tue, 22 Jan 2019 at 7:34 AM, konehead@... [EVGRAY]
> <[email protected]> wrote:
>
>
> Hi Warren
> Not trying to confuse., just saying any sort of prime
> mover motor could be used IF your generators are no lenz.....
> Rotovertor is stuck in its sinewave speed so would need a
> VFD to test the generators at specific rpms that will give
> the delayed Lenz effect.
> Why this design loops and with power left over is the
> generators are turned by belts and pulleys that put them
> into that delayed Lenz effect rpm window.
> To find that rpm window you need to run the generators
> through wide rpm range until you find through the testing
> where amps drop low while generator is under load noe.keep
> rpm steady there, and loop it...msybe rpms drops some when
> you try and loop it, so if so, go for higher rpm initially
> and let the rpms drop into the delayed Lenz effect window
> zone...this I believe why the flywheel. As Gary said
> original builder said he looped it without flywheel and
> flywheel only makes it easier to ":introduce" the load.
> As for rotovertor shsft power, you must increase run cap
> uf to give the shaft some decent torque....the original
> lowest draw run cap value at idle with no load on shaft
> will stall the shaft very easy with just light load on
> shaft so you need to increase run cap uf when turning
> loads...i found about 30uf gave me good power not so much
> extra draw with 7.5hp baldor as example. Be careful
> introducing large caps while motor runs!!! You might/will
> need to shut down motor and restart with new larger uf run
> cap in place
> already, so use start cap to get it going from stop, and
> pull off start cap leaving just the new larger size if run
> cap.....try putting a 30uf cap on your rv motor as it runs
> very very briefly you will see lots of magnetic braking
> manifest...
> Kone
>
>