Kinetic/Ballistic Systems

[NovakTwo]

We have never claimed that this current rating applied to the speed control, itself.

This transistor info, (that we have been posting for decades in our BL esc spec chart,) is the transistor rating taken from the technical info sheets provided by the MOSFET manufacturers.

We have never claimed it to be anything other than that. But, I will forward these comments to Bob and Adnan.

[lutach]

Originally Posted by NovakTwo

We have never claimed that this current rating applied to the speed control, itself.

This transistor info, (that we have been posting for decades in our BL esc spec chart,) is the transistor rating taken from the technical info sheets provided by the MOSFET manufacturers.

We have never claimed it to be anything other than that. But, I will forward these comments to Bob and Adnan.

Ok, I have attached 2 datasheets that shows the 2 most powerful PolarPAK MOSFETs that I know of and the Vishay shows a 52A rating at 25°C. So lets try going with 6 FETs per phase, that's only 312A (But divide that by 2 since it's a H bridge config). Now here is the thing, if you go by the datasheet it clearly says the package is only limited to 60A, so lets go with that and multiply it by 6 and still only 360A. Now the silicon is limited to 258A, but that really doesn't mean anything if the package is only limited to 60A. Novak still uses the PolarPAK style MOSFET correct? Please have Mr. Novak and Adnan provide some input on why use such a rating if it doesn't apply to the ESC itself. At the moment, I think the Futaba brushless ESC has the most ridiculous rating of all brushless ESCs.

[NovakTwo]

The historical, ridiculous current ratings were why Adnan decided to only publish the objective transistor ratings and not make any claims about the controller itself.

[lutach]

Originally Posted by NovakTwo

The historical, ridiculous current ratings were why Adnan decided to only publish the objective transistor ratings and not make any claims about the controller itself.

Putting it like that is somewhat more ridiculous if it has nothing to do with the ESC. If you want to put a transistor rating, add the datasheet of it to the website and how the 540A rating came to be. It really doesn't make any sense by putting a number out and not explain it to a simple guy like myself.