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EV200 Conducted emissions

 
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nuckollsr(at)cox.net
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PostPosted: Sun Jan 22, 2006 9:20 pm    Post subject: EV200 Conducted emissions Reply with quote

At 08:46 PM 1/22/2006 -0800, you wrote:

Quote:

<jrichard(at)ccser.com>

Eric and Others..

The EV200 uses a pulsed coil energizer scheme to enable a low average
current draw to hold the coil in place. Normal aircraft contactors use DC
to close the coil then the same DC to hold the coil in place. I talked to
the Kilovac rep about the pulse circuit and he said they have had a few
complaints about interference from the pulsing. I'm not sure what kind of
interference, but I suspect conducted interference on the coil energizing
line spreading into other sensitive audio circuits.

Here's a web link to the EV200 PDF datasheet

http://relays.tycoelectronics.com/datasheets/ev200.pdf

Has anyone experienced this interference and does the normal filter scheme
for noisy loads published by 'lectric Bob take care of it?

Hmmmm . . . "noisy" isn't very definitive. I've been spending most of
my time for the past two weeks in the EMC lab (best duty at RAC . . .
if you need some thinking time. Dark, quiet, environmentally controlled,
nothing to do but watch the paint dry). I think I saw one of those
contactors in a junk box over in experimental flight test. If I can
put my hands on it, I'll see if I can take a quick peek at conducted
emissions for this critter. If I can't find it, maybe the Tyco guys
will sample me one.

In any case, never met a noise I couldn't filter . . . but I have
seen some filters that nobody wanted to put in their airplane.

Bob . . .


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Gilles.Thesee(at)ac-greno
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PostPosted: Mon Jan 23, 2006 10:49 am    Post subject: EV200 Conducted emissions Reply with quote

Quote:
>I'm not sure what kind of
>interference, but I suspect conducted interference on the coil energizing
>line spreading into other sensitive audio circuits.
>....
>
>
.... I'll see if I can take a quick peek at conducted
emissions for this critter. If I can't find it, maybe the Tyco guys
will sample me one.

In any case, never met a noise I couldn't filter . . . but I have
seen some filters that nobody wanted to put in their airplane.

Bob . . .




Hi Bob and all,

In the past few months, I believe I have run across some problems due to
the Tyco EV-200.
For unknown reasons, it seemed to inhibit my Low Voltage Warning Module.
You'll find the story in English at :

http://contrails.free.fr/elec_lvwm_en.php

Some may remember my postings on the subject during the last two years.
I found a workaround by changing the LVWM model. It seems some are
impervious to the EV-200, and some are not. The guys at Tyco never
answered my e-mails.

FWIW,
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr

P.S. Please feel free to help me correct my English Wink


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nuckollsr(at)cox.net
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PostPosted: Mon Jan 23, 2006 1:19 pm    Post subject: EV200 Conducted emissions Reply with quote

Interesting! I couldn't find the EV-200 relay I thought was
laying loose in the junk box. I'll see if I can get them
to sample me one.

Bob . . .

Quote:
Hi Bob and all,

In the past few months, I believe I have run across some problems due to
the Tyco EV-200.
For unknown reasons, it seemed to inhibit my Low Voltage Warning Module.
You'll find the story in English at :

http://contrails.free.fr/elec_lvwm_en.php

Some may remember my postings on the subject during the last two years.
I found a workaround by changing the LVWM model. It seems some are
impervious to the EV-200, and some are not. The guys at Tyco never
answered my e-mails.

FWIW,
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr

P.S. Please feel free to help me correct my English Wink

--



Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
http://www.aeroelectric.com


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