Re: [opensuse] [OT] How much power does a PC really consume?

On Thursday 14 February 2008 10:07, James Knott wrote:
Randall R Schulz wrote:
On Thursday 14 February 2008 08:52, Per Jessen wrote:
Carlos E. R. wrote:

...

I'm pretty certain it won't be able to measure any spikes. As for
the type of load, it's almost 99% resistive. I.e. the load
doesn't vary with the phase of the AC.

"Resistive" means the current and the voltage are in phase with
each other.

But I don't see how a transformer primary, which is an inductor,
can be anything _but_ reactive.

An unloaded transformer is inductive, which limits the current to a
low value and lagging voltage by 90 degrees. As the load increases,
the voltage and current come closer into phase. When the transformer
is at maximum load, the phase angle will be 0, assuming a resistive
load on the transformer.

Ah, right. Well, my EE courses were a very long time ago. (Programming
rots the brain, it appears...)


Randall Schulz
--
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx

Relevant Pages

  • Re: Tranny tests
    ... The current rating of a power transformer is, necessarily, based ... regulation at load and/or the temperature rise. ... the voltage will drop and the temperature ... You also *must* determine the estimated power requirements for the load ...
    (alt.guitar.amps)
  • Re: Tranny tests
    ... The current rating of a power transformer is, necessarily, based ... regulation at load and/or the temperature rise. ... the voltage will drop and the temperature ... You also *must* determine the estimated power requirements for the load ...
    (alt.guitar.amps)
  • Re: Transformers
    ... >>sit at a considerable higher voltage than 10 volts if it is not under load. ... I was thinking that a high wattage transformer, ... The manufacturers want cheap, so they design for it. ...
    (sci.electronics.basics)
  • Re: Filter capacitor in power supply is increasing the voltage
    ... In what way would an inductor be applied to reduce the ... is to connect a choke to the output of the main capacitor, ... yet another capacitor that supplies the load. ... It doesn't 'drop' the voltage ...
    (sci.electronics.basics)
  • Re: Voltage Regulator Design
    ... Once I realized that my feedback was connected to the switched output ... load, the voltage did not drop like a rock, it stayed very steady, just ... very very quickly under load. ... An interesting thing that I tried, was to remove the inductor ...
    (sci.electronics.design)
Loading