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Measuring PWM current?

** Can I remind you this IS usenet you know ?

Where no good post ever goes unpunished.

** Particularly if folk misspell my name ;-)

** Normally I am polite and slow to anger, as anyone who knows me would tell you. But there is only so much BS this Koala can bear, I then leave the other party in no doubt about what I think of them.

** The Chirping Cricket is a long time poster on "aus.electronics" and lives here in Australia. That NG has virtually disappeared, through no fault of mine or his. Fas as I know, he is purely a hobbiest.

** I suspect he makes it a more easily than I do.

** I learned the art while writing numerous construction articles for "Electronics Australia" magazine. My aim was to leave nothing for the editor to mess with.
** It is tempting for a well informed person to talk over others heads and amaze them with their knowledge. But beware, charlatans do exactly the same with almost no knowledge.

Readers may not be able to tell the difference.

.... Phil

Reply to
pallison49
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useful.

Too true,

Oops. Sorry about that.

ell you. But there is only so much BS this Koala can bear, I then leave the other party in no doubt about what I think of them.

We've noticed.

ves here in Australia. That NG has virtually disappeared, through no fault of mine or his. Fas as I know, he is purely a hobbiest.

Don't knock "The Art of Electronics". It contains lots of good stuff. Luck always plays a part in the way you get to earn your living, and he does see m to have been in the right place at the right time to be able to sell his skills into a market that seems to pay well, but they aren't inconsiderable skills.

ectronics Australia" magazine. My aim was to leave nothing for the editor t o mess with.

d amaze them with their knowledge.

Total waste of time, though.

Too true, which is another reason for keeping the message clear and easily comprehensible.

And don't seem to pay much attention even when the difference is spelled ou t in some detail.

--
Bill Sloman, Sydney
Reply to
bill.sloman

Ok smart-arse. Which was the first word I clipped? You want to make a claim, you have to defend it.

You are the liar here, as anyone can check.

You have no clue why I found Win's response helpful? I'm not qualified to comment on your mental incapacities, but his writing seemed clear enough to me.

On reflection I'm not sure he was right, but I'll say why on another post.

It's true I admire Win for being a gentleman and never "playing the man" the way you (and sometimes, I) do. In this group, only PhilH and Joerg join him in having that level of maturity. Thanks, guys.

Clifford Heath

Reply to
Clifford Heath

Win,

Are you describing a servo loop here, that produces a servo current to cancel the average field at the Hall sensor? If so, how does the averaging preserve RMS measurement? If not, can you explain more clearly what you mean? Because I think Phil is right here, even though he expresses himself unpleasantly.

Clifford Heath.

Reply to
Clifford Heath

Clifford the Fuckwit Cricket puked:

** Fuck you.

** Read you own post, f*****ad, see how much of my post to Win is missing.
** Shame you do not follow that same principle.
** You have completely lost it.

You in love with Win or something ?

** Read you own post - that is not the question.
** Again, an uninformative comment about YOURSELF.

** The Chirping Cricket certainly has lost it.
** I never play the man, ever.

It only looks that way to folk who cannot follow a thread or do not read ALL the words in ALL the posts. Like you.

** In order to judge maturity, you have to have some yourself.

Counts you straight out.

In order to judge an argument, you must know who is wrong and who is not. Counts you straight out again.

Though one party may appear to be more polite, that proves NOTHING.

Charlatans and bullshit artists often EXCELL at playing the polite game.

Only fools fall for it.

FYI:

Closing up the text of a thread makes it damn hard to read.

The blank lines are there to facilitate reading and replying.

.... Phil

Reply to
pallison49

It doesn't, whence the line

"A Hall effect current sensor followed by a true RMS meter - both with adequate bandwidth which must be several times the PWM frequency."

In reality the PWM frequency isn't the crucial variable - the current sensor and the meter have to be able to follow the narrowest current peak in the waveform.

A train of 1usec spikes repeating at 100Hz won't be correctly evaluated by a current sensor and RMS meter with a bandwidth of only several hundred Hz.

Reply to
bill.sloman

** Huh ? How the hell did you get that from my post ?
** Charlatans appeal to people's emotions, which in most cases are much stronger that their thoughts. Old saying:

" You cannot reason a person out of a position that reason never got them into in the first place. "

.... Phil

Reply to
pallison49

s

The implication that I had in mind was that you might have thought that it could have been easier to write "The Art of Electronics" than it was to ma ke money whatever way you do. That strikes me as representing an imperfect appreciation of the quality of "The Art of Electronics" - more along the li nes of insufficient adulation rather than actual criticism.

tronger that their thoughts.

into in the first place. "

Good point. Charlatans frequently use a lot of flattery to lubricate their message.

--
Bill Sloman, Sydney
Reply to
bill.sloman

** Fact is, it never occurred to me the royalties on a technical book was Win's only income. Does he not hold an academic position ?

** I was thinking more of making appeals to common prejudices, myths and false assumptions. A well manufactured lie is often much easier to believe than a confronting truth.

.... Phil

Reply to
pallison49

Win's only income.

It clearly isn't, but successful textbooks can provide a very useful income stream.

The Rowland Institute for Science merged with Harvard University in 2003 (a ccording to the biographical data in the front of AoE3). So he is now a uni versity employee, but probably not in an academic position. Paul Horowitz i s a professor at Harvard, and thus definitely an academic

ch stronger that their thoughts.

false assumptions.

g truth.

Too true, and it's easy to fiddle with a lie to make it really easy to swal low. The truth is less flexible.

--
Bill Sloman, Sydney
Reply to
bill.sloman

Spare Change wrote in news: snipped-for-privacy@news.eternal-september.org:

A shunt is the best way. Then a scope probe will reveal all.

The RMS clamp will yield RMS averaged current usage if the pulses are fast enough for it to resolve the average.

Reply to
DecadentLinuxUserNumeroUno

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