Re: How much distortion is acceptable on residential utility power?



On Mar 16, 6:48 pm, "Phil Allison" <philalli...@xxxxxxxxxx> wrote:
"MooseFET"

The CFLs will tend to draw current over a wide part of the cycle.

**  100%  WRONG  !

The capacitor after the rectifier is small enough that the the ripple
is very large.

**  Means the charging time is very short  -  fool.

No it doesn't. Where did you get that idea. The capacitor will start
charging when the mains voltage has passed the voltage that the
capacitor has discharged down to and continue until some time after
the peak. Try reducing the capacitor to zero and consider what
fraction of the cycle the diodes will conduct for.



The transistor circuit makes no effort to regulate
anything. The inductor feeding the lamp controls the current.

** All got nothing to do with the actual charging time of that first
electro.

Actually it does effect it in a very important way. Consider the
capacitor equal to zero and the transistors trying to regulate case
and you will see why.

You are both wrong and rude.

.



Relevant Pages

  • Re: 4046 VCO
    ... The datasheet says 50% duty; but I want to make it variable; ... yield a 0..100% duty cycle.. ... Since each half cycle charges the timing capacitor with current supplied to its opposite end, while grounding the other one, you can replace the timing capacitor with two capacitors of different values, each connected between one of the timing pins and ground. ... That would imply that you could also modulate the VCO command voltage at the VCO output frequency -- with an analog multiplexer you could select the + and - times independently. ...
    (sci.electronics.basics)
  • Re: 4046 VCO
    ... The datasheet says 50% duty; but I want to make it variable; ... use that output ref to drive a simple PWM via ... yield a 0..100% duty cycle.. ... Since each half cycle charges the timing capacitor with current supplied to its opposite end, while grounding the other one, you can replace the timing capacitor with two capacitors of different values, each connected between one of the timing pins and ground. ...
    (sci.electronics.basics)
  • Re: How much distortion is acceptable on residential utility power?
    ... The CFLs will tend to draw current over a wide part of the cycle. ... The capacitor after the rectifier is small enough that the the ripple ... ** Means the charging time is very short - fool. ...
    (sci.electronics.design)
  • Re: Mains conditioners and power cables
    ... certainly try to increase the * initial charge current over the first few cycles as the power supply comes up, which if allowed, * may exceed the peak forward current capability of the rectifier diodes. ... This effectively means that the capacitor is a * bigger bucket, better able to supply the load's current requirements, which haven't changed ... As the bucket won't drain down as far during these pulse gaps, it will * take less energy to fill the bucket back up, not more. ... 2.However as the capacitance is higher, removing the same energy per cycle will produce a smaller voltage drop. ...
    (uk.rec.audio)
  • Re: How much distortion is acceptable on residential utility power?
    ... The CFLs will tend to draw current over a wide part of the cycle. ... The capacitor after the rectifier is small enough that the the ripple ...
    (sci.electronics.design)

Loading