Stator output question
Seasoned HDF Member
Joined: Aug 2007
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From: NW AR
A&8 said:
You said:
volts x amps = watts. or ohms x amps = watts
Watts (power) is calculated as Volts * Current (Amps). That part is correct. However, using the formula helper that HVAC guy posted (E over IR), which is the standard way to learn this stuff for the past forever, E is equal to IR, which means Electromotive Force (Volts) = Current (Amps) * Resistance. Keeping it simple (using the units),
Volts * Amps = Watts
Volts = Amps * Resistance (Ohms)
Substituting for Volts gives:
Amps * Ohms * Amps = Watts,
or R * I^2 = Watts, or said differently, the resistance in ohms times current squared is Watts.
HVAC guy had it wrong in that watts is not amps divided by ohms, but amps squared times ohms. Note that Power (Watts) are not in the E over IR equation at all.
Seasoned HDF Member
Joined: Apr 2013
Posts: 32,851
Likes: 17,886
From: Newcastle, OK
I don't think so, A&8. You too, HVAC guy.
A&8 said:
You said:
volts x amps = watts. or ohms x amps = watts
Watts (power) is calculated as Volts * Current (Amps). That part is correct. However, using the formula helper that HVAC guy posted (E over IR), which is the standard way to learn this stuff for the past forever, E is equal to IR, which means Electromotive Force (Volts) = Current (Amps) * Resistance. Keeping it simple (using the units),
Volts * Amps = Watts
Volts = Amps * Resistance (Ohms)
Substituting for Volts gives:
Amps * Ohms * Amps = Watts,
or R * I^2 = Watts, or said differently, the resistance in ohms times current squared is Watts.
HVAC guy had it wrong in that watts is not amps divided by ohms, but amps squared times ohms. Note that Power (Watts) are not in the E over IR equation at all.
A&8 said:
You said:
volts x amps = watts. or ohms x amps = watts
Watts (power) is calculated as Volts * Current (Amps). That part is correct. However, using the formula helper that HVAC guy posted (E over IR), which is the standard way to learn this stuff for the past forever, E is equal to IR, which means Electromotive Force (Volts) = Current (Amps) * Resistance. Keeping it simple (using the units),
Volts * Amps = Watts
Volts = Amps * Resistance (Ohms)
Substituting for Volts gives:
Amps * Ohms * Amps = Watts,
or R * I^2 = Watts, or said differently, the resistance in ohms times current squared is Watts.
HVAC guy had it wrong in that watts is not amps divided by ohms, but amps squared times ohms. Note that Power (Watts) are not in the E over IR equation at all.
Last edited by hvacgaspiping; Jan 5, 2014 at 03:43 PM.
Seasoned HDF Member
Joined: Sep 2012
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From: almost there
Next question professor.
Seasoned HDF Member
Joined: Apr 2013
Posts: 32,851
Likes: 17,886
From: Newcastle, OK
That`s already been determined, and you`ve totally missed the point. I`m not going to waste any more time on this.
Seasoned HDF Member
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From: almost there
[QUOTE=hvacgaspiping;12164626]The second part is corrected as: amps DIVIDED by ohms. Remember the "pie" chart and you won`t go wrong:
E = volts, I = amps, R = ohms ; where E = I times R
R = E divided by I
and, I = E divided by R
---------------------------------------------------------------------------------------------------------
Still don't see your" amps divided by ohms "on any chart.?
E = volts, I = amps, R = ohms ; where E = I times R
R = E divided by I
and, I = E divided by R
---------------------------------------------------------------------------------------------------------
Still don't see your" amps divided by ohms "on any chart.?
Seasoned HDF Member
Joined: Apr 2013
Posts: 32,851
Likes: 17,886
From: Newcastle, OK
[quote=aces&8s;12165144]
Yeah, I don`t see it either, but I tried to post it. I guess the server won`t show it the way I tried to do so. Anyway, it`s the same chart you will find in any HVAC or electrician handbook or study textbook. It simplifies remembering each of the three formulae.
The second part is corrected as: amps DIVIDED by ohms. Remember the "pie" chart and you won`t go wrong:
E = volts, I = amps, R = ohms ; where E = I times R
R = E divided by I
and, I = E divided by R
---------------------------------------------------------------------------------------------------------
Still don't see your" amps divided by ohms "on any chart.?
E = volts, I = amps, R = ohms ; where E = I times R
R = E divided by I
and, I = E divided by R
---------------------------------------------------------------------------------------------------------
Still don't see your" amps divided by ohms "on any chart.?
Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
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Seasoned HDF Member
Joined: Apr 2013
Posts: 32,851
Likes: 17,886
From: Newcastle, OK
I didn`t say that. I said, " I = E divided by R". And look at the 7 `oclock position in your "pie" chart.