Author Topic: When the volts in your house go up will watts go up to.  (Read 9128 times)

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Online ejeffrey

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Re: When the volts in your house go up will watts go up to.
« Reply #25 on: July 31, 2012, 10:14:46 am »
agree with digsys. pretty much everything will go up, no matter inductive, resistive or capacitive.

OK, but that is wrong for exactly the reasons everyone else has explained.  Also, almost no loads in a typical house are simple passive linear loads.  Almost every home load except for incandescent lamps have feedback loops of some sort to regulate their power draw.  Efficiency will change slightly, but it can go either up or down -- it depends entirely on the device.
 

Offline tom66

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Re: When the volts in your house go up will watts go up to.
« Reply #26 on: July 31, 2012, 02:40:59 pm »
CFLs typically use simple self-oscillating Royer converters, only two transistors. Brightness will vary with voltage for most of these.
 

Offline saturation

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Re: When the volts in your house go up will watts go up to.
« Reply #27 on: July 31, 2012, 06:31:28 pm »
for other readers, If you have a variac with a killawatt or similar device, you can easily prove this to yourselves via experimentation.  A variac can adjust VAC from zero to +110% typically, and you can watch the response of your devices and the power draw.  Many modern SMPS have variable input ranging from 100VAC-230VAC and multifrequency capability.  Try such devices and other plug in devices you have around [ CFL or incandescent lightbulbs, powertools etc.,] and see what happens.


agree with digsys. pretty much everything will go up, no matter inductive, resistive or capacitive.

OK, but that is wrong for exactly the reasons everyone else has explained.  Also, almost no loads in a typical house are simple passive linear loads.  Almost every home load except for incandescent lamps have feedback loops of some sort to regulate their power draw.  Efficiency will change slightly, but it can go either up or down -- it depends entirely on the device.
Best Wishes,

 Saturation
 

Offline tom66

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Re: When the volts in your house go up will watts go up to.
« Reply #28 on: July 31, 2012, 06:56:17 pm »
I own a variac, but no power meter yet...
 


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