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PWM Controller
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dwells97504 Offline
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Post: #1
PWM Controller
I have been doing HHO for 6 years. I have been let down by PWM burnouts and failures. I had one built to my specifications and so far, I can't break it.

http://www.pwmcontroller.com

Daniel Wells
02-24-2010 04:45 PM
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umim Offline
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Post: #2
RE: PWM Controller
This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.
03-28-2010 08:21 AM
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dwells97504 Offline
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Post: #3
RE: PWM Controller
(03-28-2010 08:21 AM)umim Wrote:  This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.


I am not sure how using a pwm controller is the wrong way to go. Controlling the amount of amperage you allow your cell to have is the whole point of a pwm controller.
04-13-2010 08:38 PM
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thomasbala Offline
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Post: #4
RE: PWM Controller
(03-28-2010 08:21 AM)umim Wrote:  This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.
The amount of HHO produced is directly proportional to amps used. Thus if you need 3 lpm you're going to use 30 amps; there's no way around it. You're not going to produce 3 lpm HHO with 15 amps. The goal is to keep the ratio of amps to HHO @ 1 lpm per 10 amps used. If you're using any more amperage than that you're just producing excess heat. Problem is as a cell heats up it draws more amperage; thus the PWM to limit the amps.
04-14-2010 01:51 PM
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umim Offline
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Post: #5
RE: PWM Controller
Amen!
04-15-2010 06:19 AM
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jbalat Offline
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Post: #6
RE: PWM Controller
What about something like this ??

http://www.hobbycity.com/hobbyking/store...oduct=3730

Idea is to set one frequency. Run it at 99% duty and keep reducing the duty cycle as the temperature goes up, then ramp it up as it goes down using my propeller board
(This post was last modified: 04-20-2010 03:57 PM by jbalat.)
04-20-2010 03:54 PM
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thomasbala Offline
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RE: PWM Controller
(04-20-2010 03:54 PM)jbalat Wrote:  What about something like this ??

http://www.hobbycity.com/hobbyking/store...oduct=3730

Idea is to set one frequency. Run it at 99% duty and keep reducing the duty cycle as the temperature goes up, then ramp it up as it goes down using my propeller board
Your idea is excellent; you could use a thermistor or some type of temp sensor read by the chip which in turn would control the PWM. Problem with the PWM on the site is it's light duty for remote controlled planes, boats, etc. I think there's a 3 amp rating on the label.
04-20-2010 04:45 PM
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jbalat Offline
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Post: #8
RE: PWM Controller
5v and 3A is the rating for powering the receiver in the rc plane.

It will simultaneously pump out 60A to the Motor continuously until the battery runs out of power, but it will reserve a small amount of power to run the reciever so you can land
04-26-2010 01:17 AM
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thomasbala Offline
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RE: PWM Controller
(04-26-2010 01:17 AM)jbalat Wrote:  5v and 3A is the rating for powering the receiver in the rc plane.

It will simultaneously pump out 60A to the Motor continuously until the battery runs out of power, but it will reserve a small amount of power to run the reciever so you can land
From the prices I see quoted, $9.95 to $24.95, it would be worth the risk to see if it works.
04-26-2010 05:20 PM
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DC-Hybrids.com Offline
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Post: #10
RE: PWM Controller
(03-28-2010 08:21 AM)umim Wrote:  This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.

You are right, the more amps the more heat. Heat = wasted energy. I do recommend using a pwm thou, I have seen a few good pwm's out there.
(04-14-2010 01:51 PM)thomasbala Wrote:  
(03-28-2010 08:21 AM)umim Wrote:  This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.
The amount of HHO produced is directly proportional to amps used. Thus if you need 3 lpm you're going to use 30 amps; there's no way around it. You're not going to produce 3 lpm HHO with 15 amps. The goal is to keep the ratio of amps to HHO @ 1 lpm per 10 amps used. If you're using any more amperage than that you're just producing excess heat. Problem is as a cell heats up it draws more amperage; thus the PWM to limit the amps.

You need to use a PWM constant corrent controller so as the cell heats up the amps wont go up.
(03-28-2010 08:21 AM)umim Wrote:  This is WRONG WAY to go. The goal is to use LESS Amps to produce MORE HHO. 30Amps is more than enough to produce HHO you need. If not......your generator is poorly designed.

You are absolutely right, the more amps the more heat. Heat = wasted energy. I have seen a few good pwm's out there.

David Gibson
www.dc-hybrids.com
1-888-813-2492
(This post was last modified: 06-08-2010 10:34 AM by DC-Hybrids.com.)
06-08-2010 10:25 AM
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