Where are these New Power ESCs people are talking about?

[Jahay]

Hi everyone...

Im a little worried that my MMM ESC may blow very soon... i have heard things about these new ESC that can handle more volts... I would like to mate one with a neu 1520 1600kv. Are these due for release soon? And could anyone share some specs of them?

THANKS


Josh

[Arct1k]

Don't know why it would suddenly blow but understand that the HV ESCs have been in beta testing and doing very well.

I don't believe they are rated for any more current just higher voltage.

[Jahay]

the reason i say that is because it seems to be running hotter than usual lately. I am monitoring temps very closely......
These HV ESCs should then easily be able to handle the 1520 with 6s correct without getting to hot like the MMM??? Is that how it works? or am i missing something

Thanks

[BrianG]

ESC heat is a function of current, FET switching losses (from the non-perfect switching action), the FET's Rdson value, and any PCB copper losses. The voltage applied only indirectly affects heat (more voltage on the same system will increase current, and therefore heat).

So, for an ESC to run cooler when using the same vehicle, voltage, motor, gearing, etc, the ESC would have to use better (faster switching action and lower Rdson) and/or more numerous FETs.

If you want to reap the benefits of a HV ESC, you'd have to use higher voltage on a lower kv motor (or gear down if using the same motor). The idea is the produce the same power with higher voltage (which means lower current).

Simply changing one ESC to another (HV or not) while not changing anything else will likely not help your heat issues unless the ESC is designed better and/or with better components.

[MikeW]

I believe you are correct.

Writing a electric machines exam today, my last one for my third year.

[suicideneil]

Believe?

Tis the truth dear boy

[MikeW]

[Jahay]

hmmm thanks for all the help.. i just about understood all the technical jargon! Appreciate it!

An other thing you may be noticing is the fact that batteries can better flow the juice when warmer. Your batteries may be warmer now then over winter due to warmer ambient temps. Sometimes if the temp change is drastic enough, it may even require a gearing change. In your case dropping a tooth might make sense depending on the situation.