Note there was a small addendum to the Feb 91 QEX article.
See the August 1991 issue, page 21.
73, Harry, W3IIT
At 10:36 PM 6/16/99 +0200, Carsten Groen wrote:
>
>Hi Marv et all.....
>
>The QEX article about the SMPS, uses a very simple "controller"
>a CMOS 4001 coupled as a square wave oscillator, driving a couple
>of MJE200/MJE210, which then drives 4 small transformers
>(to get some galvanic isolation). The 4 transformers (some
>small FB-77-6301 toroids) then drives each a FET. The FETS
>suggested by the author is IXYS IXFH21N45, ie 21 Amps 450 Volts.
>The FETS are running the output transformer in a H configuration.
>The output transformer is made of 10 FT193 toroids, with the
>primary made of some copper pipes, 3/8 " inside diameter, the
>secondary are wound thru the pipes, and is made of some #12
>PTFE insulated wire.
>
>There are no PWM regulating/no feedback, just a simple switcher !
>The author, W9QQ, has had the design running for "several" months,
>(that was in feb 1991) in a dual 3CX800 HF amp. He says in the article
>that the output voltage stays within 50 V going from 50 mA to 1 Amp.
>Ripple is less than 1 Vpp.... he says.
>He uses a FWB and 5100 uF at the input, and some schottky diodes
>at the output, and a 6.8 nF/10KV capacitor at the output.
>
>This was a short extract of the article.
>
>This is a VERY easy and simple construction !
>
>Carsten OZ9AAR
>http://www.magicio.com/cgroen
>mailto:cgroen@image.dk
>
>
>> -----Original Message-----
>> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
>> Behalf Of Radio WC6W
>> Sent: 16. juni 1999 18:46
>> To: amps@contesting.com
>> Subject: Re: [AMPS] SMPS a la QEX
>>
>>
>>
>>
>> On Tue, 15 Jun 1999 22:09:24 +0200 "Carsten Groen" <<cgroen@image.dk>
>> writes:
>> >
>> >Hi.
>> >With all this talk about SMPS designs, have any of
>> >you seen/tried the design from QEX Feb/1991 ?
>> >
>> >I have now gathered the parts, Transformer, IXYS FET's
>> >FET drivers, and a appropriate controller IC (unitrode)
>> >for a "prototype", up to 3KW. The thing will be 3 phase
>> >instead of the original 1 phase design. Because of
>> >the 3 phase, I'am using only 1100 uF on the input side.
>> >
>> >Any comments ?
>> >
>>
>> Hi Carsten,
>> I haven't seen that QEX article...
>>
>> Just curious... which controller chip and Power FET's does it use?
>> at what frequency?? and what topology???
>>
>> 73,
>> Marv WC6W
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *
>>
>> ___________________________________________________________________
>> Get the Internet just the way you want it.
>> Free software, free e-mail, and free Internet access for a month!
>> Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
>>
>> --
>> FAQ on WWW: http://www.contesting.com/ampfaq.html
>> Submissions: amps@contesting.com
>> Administrative requests: amps-REQUEST@contesting.com
>> Problems: owner-amps@contesting.com
>> Search: http://www.contesting.com/km9p/search.htm
>>
>>
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
>
<center>Visit the Mt. Airy VHF Radio Club at:
<underline><color><param>0000,0000,fefe</param>http://www.ij.net/packrats/
</color></underline>Info on VHF/Microwave Nets, Beacons & Subscription to
Cheesebits
Currently running a series on 24 GHz Transverters
Beacons at 50.080, 144.284, 222.065, 432.295, 903.071, 1,296.251,
2,304.037, 3456.220, 5,760.200 and 10,368.200 MHz from FM29JW </center>
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|