Voltage controller?

rr RRauscher at nni.com
Sat Mar 6 13:55:08 GMT 1999


OK, finally got into this site (it can be reeeaaallll slow). This is
an interesting pump. Basically, it is a solenoid driven pump. Figure
a bicycle pump with a magnetic solenoid pulling back the rod, then a
powerful spring returning the rod to the original position to pump.
The pump stroke is run at about 50Hz.

There are electronics built into the pump itself, no separate
controller.
According to the schematic, the input siganl is just an on/off as the
water is required. They use a pressure switch.

Bottom line,  Dan, I don't think that you need anything else to drive
this pump. It's all self-contained...

BobR.

Daniel Houlton wrote:
> 
> rr wrote:
> >
> > I'm having some trouble following what you are saying. Can you post the
> > URL for the Aqua-mist site?
> 
> Sorry, I meant to include that but forgot.
> 
> http://www.aquamist.co.uk/cp/sys1/sys1a.html#pump
> 
> That's the paragraph where they say it's controlled by frequency.  Follow
> the "TECH-LINK" link at the end of the paragraph to get to the pump specs.
> 
> > It sounds like the pump itself has some sort of controller built in,
> > that needs another controller to run?
> 
> That's the way it sounds.  Reading the paragraph more closely, it does
> state that it uses an on-board electronic controller.
> 
> The "TECH" page says "pressure and delivery rate is regulated by internal
> hi-tech electronic circuitry".  Then the specs at the bottom say it takes
> a 14V, 8A power source and a 0-12V, 5mA digital signal.  Maybe it does
> just take a 0-12V voltage signal and convert it to PWM internally?  That's
> kinda what it's starting to look like again.
> 
> The word "digital" on the spec for the signal input is what made me think
> is used a PWM signal.  Maybe it's just a buzz-word or marketing thing to
> make it sound fancier and it just uses a plain analog voltage signal?
> 
> thanks
> --Dan





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