EL wire and high voltage AC switching question

U

UK Pete

Guest
Hi all,
I need to switch high voltage (1kV at 2kHz AC), low current to
sequence some electro luminescent wires. I'm working on the trigger
sequencer and I have the high voltage/ high frequency PSU but I'm not
sure what kind of device/technique to use for the actual switching
between 5 channels. Any suggestions greatfully received.
Thanks in advance,
UK Pete
 
UK Pete wrote:
Hi all,
I need to switch high voltage (1kV at 2kHz AC), low current to
sequence some electro luminescent wires. I'm working on the trigger
sequencer and I have the high voltage/ high frequency PSU but I'm not
sure what kind of device/technique to use for the actual switching
between 5 channels. Any suggestions greatfully received.
Thanks in advance,
UK Pete
Click to expand...
... Ooops Make that 200V AC @ 2kHz...
 
"UK Pete" <kuntore@hotmail.com> wrote in message
news:1138718431.541826.305400@g47g2000cwa.googlegroups.com...
UK Pete wrote:
Hi all,
I need to switch high voltage (1kV at 2kHz AC), low current to
sequence some electro luminescent wires. I'm working on the trigger
sequencer and I have the high voltage/ high frequency PSU but I'm not
sure what kind of device/technique to use for the actual switching
between 5 channels. Any suggestions greatfully received.
Thanks in advance,
UK Pete

.. Ooops Make that 200V AC @ 2kHz...
Click to expand...
Is the switching rate 2kHz or is the AC frequency 2kHz?


--
Dan Hollands
1120 S Creek Dr
Webster NY 14580
585-872-2606
dan.hollands@gmail.com
www.QuickScoreRace.com
 
On 31 Jan 2006 12:51:08 -0800, "UK Pete" <kuntore@hotmail.com>
wrote:

Sorry Dan, I should have made that clear. The AC is 2 kHz but the
switching speed is only up to 20Hz and it looks like John has found the
ideal component. The only problem is I can't find a supplier that
doesn't sell them by the dozen or so. I can't even find a price on
them. I want to ideally keep the cost low as possible.
Thanks for the replies!
Click to expand...
---
In the UK, Clare lists their distributors as:

Mr Tom Paul
AX Distribution
Unit 22 Lawson Hunt Ind. Park
Broadbridge Heath
Horsham RH12 3JR,
United Kingdom
CountryCode: 44
Phone: (01) 403-240055
Fax: (01) 403-255657
mailto:axdist@wolseley.com
http://www.axdistribution.com

Future Electronics - United Kingdom
Future House, Poyle Road
Colnbrook
Berks SL3 OEZ,
United Kingdom
CountryCode: 44
Phone: (01) 753-763000
Fax: (01) 753-689100
mailto:neil.robinson@futureelectronics.com
http://www.futureelectronics.com

---
In the US, Mouser:

http://www.mouser.com/

Sells them with no mimimum quantity, and they're less than a couple
of dollars apiece, I think. Check their catalog at:

http://www.mouser.com/catalog/625/1308.pdf


--
John Fields
Professional Circuit Designer
 
On 2006-01-31, UK Pete <kuntore@hotmail.com> wrote:
UK Pete wrote:
Hi all,
I need to switch high voltage (1kV at 2kHz AC), low current to
sequence some electro luminescent wires. I'm working on the trigger
sequencer and I have the high voltage/ high frequency PSU but I'm not
sure what kind of device/technique to use for the actual switching
between 5 channels. Any suggestions greatfully received.
Thanks in advance,
UK Pete

.. Ooops Make that 200V AC @ 2kHz...
Click to expand...
MOC3021 (upto 100mA) If you're in the UK that part (or similar) should be readily
available, it's an optocoupler used to drive triacs but also seems suitable to
switching 200VAC at low currents.

Bye.
Jasen
 
On Wed, 01 Feb 2006 09:04:18 -0000, Jasen Betts <jasen@free.net.nz>
wrote:

On 2006-01-31, UK Pete <kuntore@hotmail.com> wrote:

UK Pete wrote:
Hi all,
I need to switch high voltage (1kV at 2kHz AC), low current to
sequence some electro luminescent wires. I'm working on the trigger
sequencer and I have the high voltage/ high frequency PSU but I'm not
sure what kind of device/technique to use for the actual switching
between 5 channels. Any suggestions greatfully received.
Thanks in advance,
UK Pete

.. Ooops Make that 200V AC @ 2kHz...

MOC3021 (upto 100mA) If you're in the UK that part (or similar) should be readily
available, it's an optocoupler used to drive triacs but also seems suitable to
switching 200VAC at low currents.
Click to expand...
---
I don't think so.

His 200V drive is almost for sure going to be coming from an
inverter with a rectangular output waveform.

Take a look at pages 4 and 5 of:

http://www.fairchildsemi.com/ds/MO%2FMOC3021-M.pdf


--
John Fields
Professional Circuit Designer
 
Wow. Thanks for all the thought and time taken to post replies!
I looked at the waveform from the inverter on a 'scope and found it to
be nearer 130V and around 5kHz which wasn not as it was specified to
me. The waveform appeared not too far off sinusoidal which I was
surprised at. I also found some MOC 3020s on Ebay and paid just 18
pence each for them so I'll give them a go anyway.
Let me know if you want a couple of them to play with and I'll stick
'em in the post for free.
Thanks again,

UK Pete
 
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