Making an esc better?

[mustbnitro]

WOW, I am impressed with the knowledge on this site. I am a hardcore newb with BL, but have ben in the hobby for years yet in has been a decade since I have had an electric (no such thing as BL back then). I am buying a Mamba Max and doing the stage one mod myself. I am an engineer and cannot leave anything alone, I was planning on adding better caps, but it is great with the step by step information on here on help you with disassemby and reassembly. This is great to see people not going out and trying to fix it with more money, but with knowledge and research.

[kingiggy262]

Just ordered a Mamba Max now i'm going to do the stage 1 mod! I ordered everything except for the Zener TVS diode because I couldn't find any singles and didn't want to pay $6 + shipping at Digikey for 10 when I only need 1.

So does anyone have any extra Zener TVS diodes that they would be willing to sell to me? Is there somewhere else that I could get one for a reasonable price?

These are surface mount 1500W and 27V. Link to Digikey: http://www.digikey.com/scripts/DkSea...C27AT3GOSCT-ND

Thanks!

What is the point of these Zener diodes? What is there function, and exactly how do you solder these things to the board? Thx!

[GriffinRU]

Originally Posted by cadima

What is the point of these Zener diodes? What is there function, and exactly how do you solder these things to the board? Thx!

I believe suicideniel is correct about the "clamp" function. I just soldered mine to the back side of the power board where the battery leads poke out.

- Just to add for the comments above
Zeners/Transorbs voltage was selected to protect FET's from voltage spikes, running at 4-5S close to FET's rated voltage and for caps. With temp going up caps rated voltage goes down as well over the time, so to keep them happy I installed zener.

And as bonus reverse polarity protection for FET's, not for wires and bad soldering :)
DO NOT CHECK it!

[suicideneil]

I believe they are refered to as 'voltage clamps', and the purpose is to absorb transient voltage spikes that might harm the cap or batteries... something like that I think i read a while back...

They are surface mounted normally, so good soldering skills and a good iron are required.

[DrKnow65]

I believe suicideniel is correct about the "clamp" function. I just soldered mine to the back side of the power board where the battery leads poke out.

Are these diodes polarized? I have some and there's no indicators on them to suggest there's a positive and negative side. Thanks!

[GriffinRU]

Originally Posted by cadima

Are these diodes polarized? I have some and there's no indicators on them to suggest there's a positive and negative side. Thanks!

[rchippie]

ARTUR do you have any plans on putting 2 Monter mamba's to make a super controller .

[GriffinRU]

Originally Posted by rchippie

ARTUR do you have any plans on putting 2 Monter mamba's to make a super controller .

Always

Does having the booster cap on those long leads decrease the effectiveness? Or is it ok so long as the wire guage is low enough to keep inductance down (something like that)?

[GriffinRU]

Originally Posted by cadima

Does having the booster cap on those long leads decrease the effectiveness? Or is it ok so long as the wire guage is low enough to keep inductance down (something like that)?

Yes,
The shorter the current loop the better, but you need to find a good place for cap as well. It is a trade off, but still improvement over long leads, connectors and such

[DrKnow65]

Yes they are, I'll have to remember which way to put it on but thewre is a little C shaped notch in one side of the top of the diode...

[DrKnow65]

Notch goes to the positive side.

cool, thx