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| alexwai |
07-29-2004 10:07 PM |
Will it work on AC pump?
Hi guys
After spending time in searching several forums, I realize that DC pump can be adjusted its performacne by changing the supplying voltage. My question is: Can I do the same thing on AC pump. Will there be any damange on it? Can all of you tell me the Pros and Cons on doing that? I got my Iwaki MD-20RZ pump and want to try if it is possible to do that.
Thanks :)
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| DrMemory |
07-29-2004 10:24 PM |
You can't change the speed of an AC motor by changing the voltage. When the voltage gets low enough the motor will simply stop. I'm not sure at what percentage below normal operating voltage where this will happen but it's not a lot.
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| AngryAlpaca |
07-29-2004 10:39 PM |
You can lower the motor speed with a fan controller (ceiling fan) or some such thing. I'm not sure about increasing it, but you can lower it...
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| lolito_fr |
07-30-2004 03:36 AM |
Have you tried this AA?
AC pump motors and fan motors are not the same design! Mag drive pump motors are synchronous - ie they are locked in to mains frequency. Lower the voltage and they will stall, not slow down...
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| Butcher |
07-30-2004 05:38 AM |
How to slow down an AC pump - make your own AC. ;)
If it's something you really want to do you could hook up a variable frequency AC inverter and drive that off a DC source. It's not very efficient though - much easier to just get a DC pump.
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| funbun |
07-30-2004 06:46 AM |
or just buy a smaller pump;)
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| alexwai |
07-30-2004 06:49 AM |
Quote:
Originally Posted by Butcher
How to slow down an AC pump - make your own AC. ;)
If it's something you really want to do you could hook up a variable frequency AC inverter and drive that off a DC source. It's not very efficient though - much easier to just get a DC pump.
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Just hooking up the variable frequency AC inverter? Simple enough. My father-in-law got one spare frequency AC inverter. Think can get it with free. I guess it is now efficient, right. ;) |
| Butcher |
07-30-2004 07:06 AM |
AC->DC->AC is not very efficient at all, too many conversions.
Note, cost to buy/aquire has no bearing on efficiency.
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| funbun |
07-30-2004 07:26 AM |
Why is my sig so big? I've got it on the lowest size and it's bigger than everyone else's
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| Butcher |
07-30-2004 07:31 AM |
Quote:
Originally Posted by funbun
Why is my sig so big? I've got it on the lowest size and it's bigger than everyone else's
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Because it's full of crap? :p
Seriously though, use less lines if you want a smaller sig - really no one much cares about having system specs listed in minute detail, if at all. |
| alexwai |
07-30-2004 07:48 AM |
Quote:
Originally Posted by Butcher
AC->DC->AC is not very efficient at all, too many conversions.
Note, cost to buy/aquire has no bearing on efficiency.
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Sorry for different definition on term "efficiency" .
I thought at the very first that frequency AC inverter = frequency transformer. After talking with my father-in-law, it is different. BTW, Is it OK to use the frequency transformer to do that job? |
| Butcher |
07-30-2004 08:23 AM |
Quote:
Originally Posted by alexwai
I thought at the very first that frequency AC inverter = frequency transformer. After talking with my father-in-law, it is different. BTW, Is it OK to use the frequency transformer to do that job?
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Yes you can use a frequency converter. Also note that converting to frequencies much outside the 50-60Hz range (especially higher frequencies) may cause the pump to fail and will possibly invalidate your warranty. |
| funbun |
07-30-2004 08:40 AM |
I cut out a lot of stuff but the font size is still bigger than everyone else's. Maybe it's just the font size. I've got it set tp 120dpi in ATI cp.
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| redleader |
07-30-2004 10:46 AM |
This forum has sigs ? :confused:
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