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Filter Question! How to get rid of SPIKES!

V

Victor hyppolito

Jan 1, 1970
0
Hello,

I have a 60Hz AC voltage comming from a transformer 120/220V that
powers some cooling fans, but it's got some spikes at the output, and
Im having problems with that. The spikes are burning the fans.

Here is the link of the wave form: http://br.geocities.com/suellemtosi/
wave.jpg

What the main problem is at 2Khz, am I right?

I want to make a filter to attenuate those spikes, but I´ve never done
a filter for voltages above 12V. I know just how to use op-amps, but
for 220V Its got to be a passive filter.

Does anybody have an idea of what type of filter would be more
appropriate? Low pass, tuned filters....

I have JUST some 3,9mH inductors to make it, the other components can
be anything to match the configuration.

Anything will be helpful!!!
Thanks a lot!
Victor
 
P

Phil Allison

Jan 1, 1970
0
** Groper Alert


I have a 60Hz AC voltage comming from a transformer 120/220V that
powers some cooling fans, but it's got some spikes at the output, and
Im having problems with that. The spikes are burning the fans.


** What exactly is burning ?

The brushes in the fan motors ?



Here is the link of the wave form:

http://br.geocities.com/suellemtosi/wave.jpg


** Looks like commutation noise spikes from a brush ( AC/DC ) motor.

What the main problem is at 2Khz, am I right?


** Not even close.


I Does anybody have an idea of what type of filter would be more
appropriate? Low pass, tuned filters....


** Try using a capacitor wired across each motor.

Start with a 100nF, 250 volt AC rated cap and increase the value as
needed.

But that will not stop brushes burning.



....... Phil
 
T

Tam/WB2TT

Jan 1, 1970
0
Phil Allison said:
** Groper Alert


I have a 60Hz AC voltage comming from a transformer 120/220V that
powers some cooling fans, but it's got some spikes at the output, and
Im having problems with that. The spikes are burning the fans.


** What exactly is burning ?

The brushes in the fan motors ?



Here is the link of the wave form:

http://br.geocities.com/suellemtosi/wave.jpg


** Looks like commutation noise spikes from a brush ( AC/DC ) motor.




** Not even close.


I Does anybody have an idea of what type of filter would be more
appropriate? Low pass, tuned filters....


** Try using a capacitor wired across each motor.

Start with a 100nF, 250 volt AC rated cap and increase the value as
needed.

But that will not stop brushes burning.



...... Phil
Fix the problem that is causing the spikes, which may or may not be causing
the fans to burn out.

Tam
 
P

Phil Allison

Jan 1, 1970
0
"Tam/WB2TT"

Fix the problem that is causing the spikes, which may or may not be
causing the fans to burn out.



** Go tell the OP that one - not me.





........ Phil
 
W

Winfield Hill

Jan 1, 1970
0
Phil said:
Tam/WB2TT wrote,


** Go tell the OP that one - not me.

Phil, would you kindly just give it a rest? Since when
are _you_ representing the s.e.d. community?
 
P

Phil Allison

Jan 1, 1970
0
"Winfield Hill"
Phil, would you kindly just give it a rest?


** As usual - Win has totally misread the thread.

TAM carelessly posted his dopey remark to ME.

It should have been to the OP.


Since when
are _you_ representing the s.e.d. community?


** There is no " s.e.d community " and no-one represents a NG.

Clearly, YOU falsely imagine there is and YOU falsely imagine that YOU do.

How grandiose & delusional of you.

Got any more asinine fallacies you feel like getting off your chest today -
Win ??




........ Phil
 
W

Winfield Hill

Jan 1, 1970
0
Phil said:
Got any more asinine fallacies you feel like getting off your
chest today - Win ??

Like I said, would you kindly just give it a rest? We're tired
of reading your gratuitous outbursts. When making a simple
conversation in these threads, it's certainly not necessary
to make every comment exactly under and in response to the
person being commented to, get it? We could all see that
Tam was responding to Victor suggesting he fix the problem
that was causing the spikes, and we didn't need to see your
lecture about exactly where in the thread he should have
made his innocent post. In fact, it appears to me Tam was
seconding to Victor your suggestion of placing a capacitor
across the motor, and if so, his comment after your post was
a good place for it. This is just usenet, after all, so
please do kindly give it a rest. Sheesh!
 
P

Phil Allison

Jan 1, 1970
0
"Winfield Hill - Blowing Smoke Out His Arse "

Like I said,


** Go straight to hell, you posturing pommy ass.

We're tired of reading your gratuitous outbursts.


** Yawn - speak only for yourself, you posturing pommy ass.

There is no " s.e.d community " and no-one represents a NG.

Clearly, YOU falsely imagine there is and YOU falsely imagine that YOU do.

How grandiose & delusional of you.

Go straight into hell.



When making a simple
conversation in these threads,


** NG posting is not a conversation.

Yet another of your asinine fallacies.

it's certainly not necessary
to make every comment exactly under and in response to the
person being commented to, get it?


** Yawn - yet another asinine fallacy.

We could all see ....


** Not again !!!!!

Speak only for yourself, you posturing pommy ass !!!!


and we didn't need to see .....


** And another one !!!!!

Speak only for yourself, you posturing pommy ass !!!

There is no " s.e.d community " and no-one represents a NG.

Clearly, YOU falsely imagine there is and YOU falsely imagine that YOU do.

How grandiose & delusional of you.


your lecture about exactly where in the thread he should have
made his innocent post.


** The phrase: " Go tell the OP that one - not me. " simply aint any
kind of a lecture.

How grandiose & delusional of you to pretend it is.

Go straight into hell.


In fact, it appears to me ....


** Yawn - who the hell cares what a grandiose, delusional pommy wanker
imagines ?

Until the OP returns and says exactly what kind of motors he has, commenting
further on his post is a waste of time.



Mr Hill:

Berating me over one simple and quite fair comment is

UTTERLY INSANE !!!!!

**** OFF you boring old Wind Bag !!




........ Phil
 
T

Tam/WB2TT

Jan 1, 1970
0
Phil Allison said:
"Winfield Hill"



** As usual - Win has totally misread the thread.

TAM carelessly posted his dopey remark to ME.

It should have been to the OP.
I know that, but you are the only poster that shows up on this subject. I
hoped that the OP would look at your response, and see my comment. It is not
dopey; if the spikes are actually causing the fans to blow, they are causing
other problems also.

Tam
 
P

Phil Allison

Jan 1, 1970
0
"Tam/WB2TT"


I know that,


** Thankyou for your most honest reply.

Which ** alone ** justifies my comment in response.

" Go tell the OP that one - not me."


but you are the only poster that shows up on this subject.


** OK - so the only horse in sight must carry the load .....

Which third word fucking shit hole is that philosophy from ??


I hoped that the OP would look at your response, and see my comment.


** Hoping is just not good enough.

Be aware of WHO you are addressing in future -

lest your fuckwit remarks get you in the poo again.

It is not dopey;


** It was as dopey as all hell.

if the spikes are actually causing the fans to blow, they are causing
other problems also.


** What do you do for a living ?

Collect bus tickets maybe ??

Piss off.




....... Phil
 
R

Rich Grise

Jan 1, 1970
0
Like I said, would you kindly just give it a rest? We're tired
of reading your gratuitous outbursts. When making a simple
conversation in these threads, it's certainly not necessary
to make every comment exactly under and in response to the
person being commented to, get it? We could all see that
Tam was responding to Victor suggesting he fix the problem
that was causing the spikes, and we didn't need to see your
lecture about exactly where in the thread he should have
made his innocent post. In fact, it appears to me Tam was
seconding to Victor your suggestion of placing a capacitor
across the motor, and if so, his comment after your post was
a good place for it. This is just usenet, after all, so
please do kindly give it a rest. Sheesh!

Win, you need to get out more. ;-)

Cheers!
Rich
 
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