anyone tried to using Jebo WP40? - Page 31

dartier · 03/08/2013, 06:07 PM

Quote:

Originally Posted by jedidog1

Are we even sure that these pump can be controlled by pwm it being s brushless dc motor

Sort of. Floyd earlier in the thread has already demonstrated that you can insert a PWM module in between the power output from the controller and the pump while maintaining the VA signal from the controller. The VA line is assumed to be the method the controller is using to control the pump.

We are assuming the VA signal to be a +5V PWM signal based on the pin it is connected to on the uC, but no one has been able to confirm that yet. Hopefully Roberto from Reefangel will be able to confirm or deny this possibility in the none too distant future.

Dennis

dartier · 03/08/2013, 06:36 PM

Quote:

Originally Posted by Skinnysloth

I will, however, pose a question to anyone with more expertise than myself to answer. Isn't the switching power supply (the power adapter) using the same on/off switching to regulate the voltage that gets supplied to the controller?

Sort of but with a different outcome in mind. A Switch Mode Power Supply is providing a regulated output voltage. It is true that it does this by switching the source on and off to maintain the output voltage and current. However ample filters are provided to make sure that the output is as smooth and clean as possible.

A PWM signal on the other hand is all about the duty cycle, the ratio of time the signal is on to the time the signal is off. The net result of this when only the voltage is considered is that a PWM signal appears to be a variable voltage between 0V and the +V and given sufficient switching frequency can appear to be provide variable voltage output. This style of voltage regulation works well with LEDs as they can switch at high frequency without being damaged and our eyes are not able to detect the high frequency pulsing.

As to whether or not this device would damage the pump controller, it depends. The higher the frequency of the PWM output the less chance the uC will be affected. You can minimize this by not turning the output down too much. You would want to keep the output high enough that the +5V regulator in the controller is able to provide a steady +5V output. What that level is is open to discussion. My guess would be about 7 - 8V

Dennis

bishop777 · 03/08/2013, 06:55 PM

I finally received mine after a week and a half. I hook up both of them at full speed. Very quiet I put my ears to it and still quiet which is a plus for me. My tank is on the last leg of the cycle. So I can't really give any further test. But for the person who mention it was loud,mine are really quiet.

rrasco · 03/08/2013, 07:37 PM

Are we sure the motors are DC? They are not switching AC are they? Like the 'DC' Koralias?

bhazard451 · 03/08/2013, 07:45 PM

Quote:

Originally Posted by rrasco

Are we sure the motors are DC? They are not switching AC are they? Like the 'DC' Koralias?

The power supplies feed 24V DC to the pump. A few of us have bought universal power supplies with 12-24v sliders, and the pump slows down/speeds up according to the voltage provided.

jedidog1 · 03/08/2013, 07:49 PM

Im sure thier dc but being brushless with three wires it could be alternating current 3 phase with I dont thank can be controlled by pwm but by electronic speed control but thats just a guess, if they can be controlled by pwm then they could be hooked up to ardunio pwn and you could write your own programs for wave and speeds that would be nice

dartier · 03/08/2013, 08:31 PM

Quote:

Originally Posted by jedidog1

Im sure thier dc but being brushless with three wires it could be alternating current 3 phase with I dont thank can be controlled by pwm but by electronic speed control but thats just a guess, if they can be controlled by pwm then they could be hooked up to ardunio pwn and you could write your own programs for wave and speeds that would be nice

Pretty sure it is not 3 phase. Appears to be +24V, ground and the (VA) control signal. My bet is on +5V PWM for the VA line. I don't have a pump, but based on the photos posted of the controller board, the PIN on the microcontroller the VA trace connects to, and what I am was able to find in the datasheets of that chip family, that is my best guess.

Dennis

SeedlessOne · 03/08/2013, 08:56 PM

Quote:

Originally Posted by dartier

Pretty sure it is not 3 phase. Appears to be +24V, ground and the (VA) control signal. My bet is on +5V PWM for the VA line. I don't have a pump, but based on the photos posted of the controller board, the PIN on the microcontroller the VA trace connects to, and what I am was able to find in the datasheets of that chip family, that is my best guess.

Dennis

Just received my pump today. Is there any thing I can try...any fresh ideas? Feel free to pm me here or on reefangel.

Skinnysloth · 03/08/2013, 09:11 PM

Quote:

Originally Posted by dartier

Sort of but with a different outcome in mind. A Switch Mode Power Supply is providing a regulated output voltage. It is true that it does this by switching the source on and off to maintain the output voltage and current. However ample filters are provided to make sure that the output is as smooth and clean as possible.

A PWM signal on the other hand is all about the duty cycle, the ratio of time the signal is on to the time the signal is off. The net result of this when only the voltage is considered is that a PWM signal appears to be a variable voltage between 0V and the +V and given sufficient switching frequency can appear to be provide variable voltage output. This style of voltage regulation works well with LEDs as they can switch at high frequency without being damaged and our eyes are not able to detect the high frequency pulsing.

As to whether or not this device would damage the pump controller, it depends. The higher the frequency of the PWM output the less chance the uC will be affected. You can minimize this by not turning the output down too much. You would want to keep the output high enough that the +5V regulator in the controller is able to provide a steady +5V output. What that level is is open to discussion. My guess would be about 7 - 8V

Dennis

Thanks for the explanation. So, I'm hearing, it's probably fine to use at the higher voltages, but use at your own risk.

SeedlessOne · 03/08/2013, 09:31 PM

http://youtu.be/kyjGzXI7YpU

Made this video for my stepdad showing him new pump so ignore my dorky commentary.

jedidog1 · 03/08/2013, 09:55 PM

When I get time ill try to run the pwm throught my ardunio see if I can get it going

Izek · 03/09/2013, 02:19 AM

Awesome came home to my new WP-40 after a weeks wait can't wait to start up my new 75g and try this bad boy this pump has gotten so much attention in the last three weeks it's crazy I don't think I even got this excited when the mp-40s came out

ctlegacy · 03/09/2013, 08:06 AM

Quote:

Originally Posted by SimonSKL

I am going to insert the 3-page user manual of the WP40 here in English. L is about 1/3 of full power.

Thank you!!!

DavidinGA · 03/09/2013, 11:52 AM

Wow talk about fast shipping my pump left Hong Kong on the 7th and it arrived today the 9th! That or the date it left HK was wrong lol...

Sent by Samsung Galaxy Note 2 and Tapatalk 2

takayan · 03/09/2013, 11:55 AM

When did u order? Mine has not shipped yet

SimonSKL · 03/09/2013, 12:01 PM

Quote:

Originally Posted by DavidinGA

Wow talk about fast shipping my pump left Hong Kong on the 7th and it arrived today the 9th! That or the date it left HK was wrong lol...

Sent by Samsung Galaxy Note 2 and Tapatalk 2

That's great! I know some people are complaining about the $26 shipping cost but when you compare the domestic shipping cost say by UPS for such a package, it is not really that bad for international shipping.

amutti · 03/09/2013, 12:59 PM