# Hey do you know your car's alternator only outputs 7-10% while it's running? - Page 23

Posted by John Fields on August 14, 2009, 11:50 am

wrote:

Can you say: "Tongue in cheek?"
---

It's clear to me that if the motor load is resistive and draws 6 amperes
from 115VRMS mains, then the power delivered to a nonreactive mechanical
load cannot be greater than:

P = IE = 6A * 115V = 690 watts.

As a matter of fact, (so far) the three basic laws of thermodynamics
are:

1. You can't win.
2. You can't break even
3. You can't get out of the game

So, for 690 watts taken from a source, what will be delivered to the
eventual load will depend on the price exacted by the delivery system.
---

to form a power

True, but still utter nonsense since we draw power from a voltage source
which _is_ fixed at 120V.

That means that no matter how much power we ask the source to deliver,
it will deliver it into a load which is designed to drop 120V at its
required power
---

Sure, if the 12VDC source can supply 50 amperes into the load without
sagging, but so what?
---

I think what's been confirmed is that you're an idiot and, consequently,
that your opinions are irrelevant.

JF

Posted by You on August 14, 2009, 5:44 pm

Sonny, there is NO SUCH THING as a pure Resistive for a Motor.......

Posted by John Fields on August 14, 2009, 6:55 pm

Even if its inductance is tuned out?

JF

Posted by Archimedes' Lever on August 15, 2009, 1:14 am

Yes, there is.

A rail gun is a linear motor, and there is ZERO inductance involved.

Mag lev is resistive as well, since it is a DC  field on the levitation
coils.

There are other examples.  Piezo comes to mind.

Sonny?  Jeez, ya retarded fuck, get a clue.

Posted by harry on August 15, 2009, 6:40 pm

wrote:

All electric motors whether linear or rotating  have an associated
magnetic field an hence are inductors.
A rail gun is inductive, hugely so.  There is a single turn coil
(formed by the two rails and the projectile) and tens of thousands of
amps. It's only the magnetic field makes it work.
A linear motor is just an induction motor "cut" axially and laid out
flat.
Mag Lev is not a motor. No work is done. (Apart from the initial lift)
Neither is piezo a motor.  And even a piezo electric crystal has
inductance.

•
• Subject
• Author
• Date
 Re: Hey do you know your car's alternator only out... StickThatInYour... 08-08-2009
 Re: Hey do you know your car's alternator only out... Archimedes' Lev... 08-08-2009
 Re: Again power is not measured in AMP, but in WAT... Archimedes' Lev... 08-11-2009
 Re: Again power is not measured in AMP, but in WAT... Archimedes' Lev... 08-13-2009
 Re: Again power is not measured in AMP, but in WAT... Archimedes' Lev... 08-18-2009