Efficiency Repot OKR 10 Amp/50 Watt Converter

[Todd Mulske]

I tested a Joye 2.3 standard atomizer on the new mod I just did to see what kind of efficiency I was getting. This converter is rated at being 92% efficient, but my results made me very happy. The atomizer was tested with an ohms meter before testing to make sure the results would be accurate. The calculations were done with Breakthu Software because I am too lazy to get a pencil and piece of paper out, lol; why go through that when a program like that is available. Here are the results: I will post new results with different resistances as I start my venture into higher resistance atomizers. I am assuming the results will only get better with higher resistance because lower Current or Amperage is used; Amperage causes heat in the wire; not voltage; heat is dissipated causing energy to be lost therefor causing lower performance; the less amperage; the less heat ; means less energy dissipated through the wires; meaning higher performance.

The mod this is referring to can be found at the following link:

http://www.e-cigarette-forum.com/fo...ally-finished-okr-10-amp-50-watt-powered.html

 

[CraigHB]

I don't think you're understanding efficiency correctly. What you are measuring is output voltage drop under load which is a part of efficiency, but it's not the whole story.

To measure the efficiency of your converter, you need to take a reading on input voltage and input current to calculate input power. Then you need to measure output voltage and output current to obtain output power. Divide output power by input power to calculate efficiency. You'll probably find it is fairly close to the numbers stated in the data sheet.

To calculate output power, you can just measure output voltage and do V²/R if you have a good reading on atty resistance.

You can find input power with a good DMM by connecting it in-line with the battery to measure current. Since current meters have some power less themselves, you need another meter to measure input voltage at the converter simultaneously. Measuring input voltage without the current meter in-line will yield an inaccurate result.

 

[Todd Mulske]

ok, I understand now, thanks for the heads up. appreciate it. still happy with the results though.

I don't think you're understanding efficiency correctly. What you are measuring is output voltage drop under load which is a part of efficiency, but it's not the whole story.

To measure the efficiency of your converter, you need to take a reading on input voltage and input current to calculate input power. Then you need to measure output voltage and output current to obtain output power. Divide output power by input power to calculate efficiency. You'll probably find it is fairly close to the numbers stated in the data sheet.

To calculate output power, you can just measure output voltage and do V²/R if you have a good reading on atty resistance.

You can find input power with a good DMM by connecting it in-line with the battery to measure current. Since current meters have some power less themselves, you need another meter to measure input voltage at the converter simultaneously. Measuring input voltage without the current meter in-line will yield an inaccurate result.

 

[Quigsworth]

Find your watts (volts x current)...watts out divided by watts in x 100 = eff

 

[Todd Mulske]

Find your watts (volts x current)...watts out divided by watts in x 100 = eff

It is easy to figure out output watts because my meter on the box tells me output voltage and I can measure the resistance of the atty and just square the voltage and divide the resistance of the atty, but input watts would be a little harder to do since I only have an electricians multi meter that only measures amperes for ac current. Never fooled around much with dc before this, but with the electrical wiring I do the ac multimeter is a must, electricians best friend, but you now that. I am not going to go out and buy a dc meter just to do this; I will settle with just knowing that it works great. When I pull the trigger on this OKR, it is sooooo smooth, I can tell the difference between it and the ego battery, okr slaughters it.

 

[Quigsworth]

And that's all that really matters Todd....Mmmm, vapolishiousness, lol

I just finished a pt with an OKR 6 in it, I plan on taking some readings on it (if only to compare it to my Madvapes reg)...will let you know what I get as far as eff.

 

[CraigHB]

Yea, it's nice to know efficiency, but if you're getting good run times and you're happy with how it vapes than no need to run out and get a DMM just to measure it. My wife uses the eGos. I don't like them much and there's a huge difference between those and a good regulated mod. The eGos seem weak to me.