Re: [CAD_CAM_EDM_DRO] Re: LARGE DC MOTOR speed control question

on 2000-07-17 20:13:47 UTC

Virtually all computer power supplies today are power factor corrected/mac

-----Original Message-----
From: Mariss Freimanis <geckohall@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Monday, July 17, 2000 5:05 PM
Subject: [CAD_CAM_EDM_DRO] Re: LARGE DC MOTOR speed control question

>Jon, I wasn't aware of that and I stand corrected. However, the
>prolifiration of non-corrected power supplies in computers and other
>electronic devices is begining to have an impact on the power grid
>regards to reactive loads. I recently read that standards may be
>instituted requiring power supplies be power factor corrected to .98
>sometime in the near future. Witness the number of new switching
>power supply ICs that include power factor correction circuitry.
>
>Mariss
>
>> Standard home meters do NOT do that. they read real power draw, by
>> magnetically multiplying the instantaneous voltage times the
>> instantaneous
>> current. So, poor power factor, either due to reactive current or
>> non-linear
>> loads, do not affect power meters ability to read real power only.
>
>
>
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