Precharge Path using Deans connectors.

[Huthy]

Hi guys,

I will be using Deans Connectors on my 10S Razor setup and I had a couple of questions regarding a Precharge Path to arrest the spark on connection to the ESC.

http://www.ausrc.com/forum/members/images/AUSRC/precharge.jpg

Figure 1 shows the way in which I understand it needs to be wired for Deans, ie you need to parallel both leads. Obviously in the lighter weight lead (probably in the +ve on the ESC side) there will be the 100ohm resistor.

Is this correct?

My question regarding figure 2 is this. If I plug my data logger in line as shown, and the precharge goes "around" the data logger, how much leakage would we expect to escape around the data logger and therefore not be captured. Given the resistor in the precharge path, I can't imagine it would be huge, and therefore I would think it would be acceptable.

Thoughts?

Thanks in advance.

Regards,

Chris

[kgfly]

G'Day Chris,

Just came across this thread. I hope you got it sorted out OK. I am not an expert on 10S setups but I am an electrical engineer :wink:

Yes, you need to use a two-wire/two-pin pre-charge setup with Deans connectors.

Yes, a 100Ohm resistor in the positive wire on the ESC side makes sense. I have not done the calculations but at a guess a 2W resistor should be safe.

Yes, the data logger will be fine like that. It has a very low resistance shunt (typically a milliohm or two) so the 100Ohm parallel path will get about 1/100,000 of the current that passes through the logger's shunt, nothing to worry about.

Hope that us some help. Post some photos of you solution if you get a chance.