Tesla Patent #464666

[clone477]

Has anyone looked over this patent of Tesla"electro magnetic motor". He says in there that by using a capacitor he totaly eliminates self induction making the motor more effiecient. Is this the same as BEMF being eliminated, or does that only apply to a DC motor??

[RotogenRay]

What he means is that by adjusting the capacitance (for whatever frequency AC) you're tuning it to a state of semi-resonance.

If you have an inductor, in an AC circuit, the reactance (which is frequency dependant) will make the current want to lead the voltage (or the voltage lag the current)

Its the opposite if you're putting AC through a capacitor. The voltage leads the current.

This has to do with the inherent differences in these two devices- inductors store or pass energy through a magnetic field, making the current want to stay low when its rising and stay high when its falling- the magnetic field that is built up resists a change in the current flow. Its the opposite in a capacitor, because the dielectric field works on voltage.

Reactive power is sort of wasting power- because you get the greatest effects when the voltage and current are in phase- thats real energy transfer. Like how you get the greatest effects when you throw a punch if you actually hit someone

So a capacitor is said to produce reactive power, and inductors are said to eat it up... but they're just two different types of reactances, and since most of our circuits work on magnetic induction and not capacative/dielectric attraction, we use capacitors on motors (in paralell with them on the line, or in parallel with one winding) to negate the inductive reactance, therfore your current goes down, and thus, your electricity bill.

As well, tesla devised ways to start these motors with capacitors. It basically drags the field to one side, instead of just having it stand there in the motor. If you have maybe a 3/4 or 1/2 hp motor and connect it up with no cap, you'll see what I mean, you have to turn it in some direction for it to start.

Its also a point of interest for me to mention that you can connect the circuit as "series resonant"- though the Q is so low I just call it "tuning"- so that it will draw maximum current. In the paralell resonant, voltage is maximized and current is minimized, but with a capacitor in series with an inductor on an AC line, current is maximized...

I point now to my small documentary- know your microwave transformer:

YouTube - Know your MOT

[lighty]

If you have an inductor, in an AC circuit, the reactance (which is frequency dependant) will make the current want to lead the voltage (or the voltage lag the current)

Its the opposite if you're putting AC through a capacitor. The voltage leads the current.

It's just the opposite. In capacitor current leads voltage 90° and in inductor current lags voltage 90°.

[amigo]

Funny I was reading about it just few days ago, here's on site I thought had nice graphs about it

INDUCTIVE AND CAPACITIVE REACTANCE

[darkwizard]

Hi, anybody has read Gabriel Kron, the negative resistance, the cap with the inductance?

[RotogenRay]

It's just the opposite. In capacitor current leads voltage 90° and in inductor current lags voltage 90°.

Ok, yeah, whatever it is

I should know these things

But one is complimentary to the other, thats the only point... I knew when I wrote it I was wrong about something... hoped nobody would notice

[RotogenRay]

Hi, anybody has read Gabriel Kron, the negative resistance, the cap with the inductance?

kron, yes

what you're talking about- I don't know

please clarify