koralia controller ...

[vince_otu]

somebody did look alreadyu how this 12V pump are working ? Is it voltage variation of frequency ?

It's look like the controller is too much expensive ... Maybe it will be interesting to do a diy one, no ?

I am electronic engineer and ready to have informations about it to make one !

Vincent

 

[Curtswearing]

Wavemakers are notorious for being very hard on powerheads. The sudden on/off causes them to wear out early and sometimes even to restart spinning in the wrong direction.

The way Hydor Korallia decided to fix this was two-fold;

1) Use DC motors in the powerheads vs AC powerheads
2) Never completely power down the powerhead (i.e., when the powerhead is "off" it isn't really, it's just only getting maybe a half volt vs 12 volts)

 

[lizardarm]

Welcome to Reef Frontiers Vincent.

 

[vince_otu]

so they never shut down the power head right ?

Again,is it frequency or voltage regulation ?

 

[braddo]

Curtswearing are you sure the motors are DC? Posts on other forums suggested they were low voltage AC motors.

 

[Curtswearing]

Curtswearing are you sure the motors are DC? Posts on other forums suggested they were low voltage AC motors.

No, I'm not sure. Nor do I know why it makes a difference. I'm merely telling you what their sales rep said.

I'm going to PM DonW and Scooterman.

 

[braddo]

A DC controller that just regulated the voltage would be relatively simple.

I'd like to hear from Don and Scooterman for a more difinitive answer. I also saw these new pumps and was considering making my own controller until I read a few posts suggesting the motors were actually AC.

Quoted from mabviper on RC in a thread that just seemed to die in mid july.

"Anyhow, for those EE guys and girls, you can control these pumps buy designing a controller that can adjust the frequency of the 12V AC as well as the amplitude of this signal. If for example, you only control the frequency without controlling the amplitude, you'll change the designed motor-torque characteristics of the pump, ie, the change of the speed of the motor isn't linear to the change in frequency. Probably make the motor fail prematurely.

For me, if I want to control these pumps, I'd get a DC adaptor rated somewhere at 15V 5A (laptop adapter works too). Put the DC through a DC-AC inverter driven by a PWM signal to adjust the frequency and amplitude AC output. There's alot of details you need to look at to make it work w/o risk of damage or overheating."

 

[Scooterman]

I've actually read somewhere from the manufacturer I think that these are in fact DC motors & probably voltage controlled but there is several ways to accomplish this, It actually could go either way If they wanted to get fancy.

Let me do some looking around to see, I know their ac PH's are awesome, I'd compare that to a Maxi-jet or Eheim & for the price unbeatable.

 

[Ed Hahn]

somebody did look alreadyu how this 12V pump are working ? Is it voltage variation of frequency ?

It's look like the controller is too much expensive ... Maybe it will be interesting to do a diy one, no ?

I am electronic engineer and ready to have informations about it to make one !

Vincent

Vincent,
How does 30 dollars sound? Look up a Chauvet 4005 on Ebay. I bet it will do what you want.

cheers! Happy Thanksgiving!
Ed

 

[Scooterman]

Koralia 4 12V
Low Voltage Controllable Pumps
Koralia 12V is a low voltage, Low consumption controllable pump ideal for water movement in marine aquariums

The Koralia 4 12V range is specifically designed for & can be used only with the Hydor Koralia Wavemaker system

It is controlled by voltage & assuming a max of 12VAC, doesn't specify but I'm almost certain it is.

 

[Scooterman]

Vincent,
How does 30 dollars sound? Look up a Chauvet 4005 on Ebay. I bet it will do what you want.

cheers! Happy Thanksgiving!
Ed

That is for lighting, you'd blow up the low voltage units but It may work on the regular Ph's but probably will burn it up over a short period of time.

 

[rlugo29]

Hey guys, the Seio Controller works the same way on the original Korilia pumps. It does not turn them off/on. It just slows them down to 50%, then speeds them back up to 100%.