| Author |
Message |
aym_qunibi
Joined: 05 Mar 2005
Posts: 78
Helped: 2
|
 05 Jun 2005 15:28 proportional valve controller |
|
|
|
|
hi there
i want to design a proportional valve controller that when i give a signal 0-10volt or 4-20ma it outputs a high currrent 0-24volt to a proportional valve.
any one has any useful ideas, a tech document,... or website ?
|
|
| Back to top |
|
 |
Btrend
Joined: 26 Dec 2003
Posts: 424
Helped: 55
|
06 Jun 2005 3:51 Re: proportional valve controller |
|
|
|
|
| aym_qunibi wrote: |
hi there
i want to design a proportional valve controller that when i give a signal 0-10volt or 4-20ma it outputs a high currrent 0-24volt to a proportional valve.
any one has any useful ideas, a tech document,... or website ?
|
hi,
u must elaborate on ur spec.
what is ur input ? "a signal 0-10volt or 4-20ma" ??
what is ur output ? "it outputs a high currrent 0-24volt " ?????
what is ur application ?
if possible, try to draw the block diagram with spec. , such that others can know what's ur imagination.
|
|
| Back to top |
|
|
IanP
Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast
|
06 Jun 2005 4:00 Re: proportional valve controller |
|
|
|
|
You haven't specified what current is required.
If you don't need more than 3A then you can employ switchmode voltage regulator, such as LM2756 ( http://www.national.com/ds/LM/LM2576.pdf ) and connect your control voltage (through an opamp, to give you full range 0-24V) to the ADJ pin.
To achieve 0-24V range you will need small negative voltage ≈ -3Vdc and normal unregulated ≈+30V.
If this is what you are after let us know..
Regards,
IanP
|
|
| Back to top |
|
|
Google
AdSense
|
06 Jun 2005 4:00 Ads |
|
|
|
|
|
|
| Back to top |
|
|
aym_qunibi
Joined: 05 Mar 2005
Posts: 78
Helped: 2
|
06 Jun 2005 8:36 Re: proportional valve controller |
|
|
|
|
thanx for your replies
my valve is 2amps with control signal of 0-10volts,but some valves which i saw also have a control signal of 4-20mA. 
|
|
| Back to top |
|
|
