Well, that was interesting......

[secrtwpn1]

A short time ago, I proudly hooked up my system. It constists of 2 Lipo 11.4v 1300A, batteries in a Y connector, connected to my Mtronics speed control. I turned it on. There was a flash of sparks, and the speed control caught on fire. Sooooooo, what happened????????????? My speed controller was brand new!!!! :-(

Farlan

[eckloss]

Y-connector..... it wasn't set up for series, was it?

[secrtwpn1]

How does one do that??????????? Wow! This is a steep (and pricey) learning curve........My shop is off the kitchen. Consequently, the light show did not go over well with the management (the wife)......................

[apa-228]

Not trying to be a smart-ss, but did you have the wiring correct into and out of the speed control?
Both battery feed wires went to the red and black on the Mtroniks and both motor leads went to the blue and yellow from the unit?

The only things I can think of that might have done that is a faulty Mtronik unit or a cross connection mixing battery feed wires to motor feed wires causing a short through the unit.

[secrtwpn1]

Yes, it was wired correctly. In testing with my Nimh battery, all was well........

[subdude]

I'm with Erich. Series connected lipos would be putting 22.8 volts to a 12 volt esc.....

[salmon]

I will also agree with Erich and Jim. Batteries run in parallel extend run time. Batteries run in series increases voltage. So, that would be the first thing that comes to mind especially if your ESC ran fine on NiMh. Use a voltmeter to check the output of your LiPos.

[secrtwpn1]

So what's the difference between parallel and series????

[apa-228]

In parallel connections both batteries negative and positive leads connect together and are then connect to the load - voltage remains the same but current is doubled. In series connections the one battery's positive lead connects to the other battery's negative lead, then the positive lead from the first battery and the negative from the second battery connect to the load - voltage is doubled but current remains the same..

[Ralph --- SSBN 598]

[secrtwpn1]

Thx for the info! I won't let that happen again!

[chips]

Series = more Speed
Parallel = more Play time