20 amp ESC and battery compatibility?

[precious-2]

Hello. I am new to electrical motors and I am using them outside of the RC world. I have two brushless motors UAV Brushless Motor A2208/12 1800Kv, Two M20A 20 A Multicopter ESCs, One 4.8-6V RC Servo /ESC tester… all from the Robot Shop per email advice on what I would need to accomplish my intended goal.

I want to power the above with Two 6 volt golf cart batteries rated at 140 amp hours each. My thought is use one battery to provide 6 volt supply and parallel batteries to provide 12 volt supply. Obviously this is not a flying machine

Since I am using two motors and two ESCs, I learned that I should eliminate one of the positive wires from the battery eliminator circuit. Here come the questions.
If I connect a 140 amp hour 6 volt golf cart battery to the two 20S ESCs, am I going to cook the ESCs? would not suspect so but youtube says its a bad idea. Yes, I get advice from youtube sometimes. If yes, then I suspect I will need a power supply with 40 Amps maximum to serve the two ESCs.

Secondly, I want as many RPM to the motor which in my understanding means that 12 volts would be twice as fast as 6V. So naturally, I want to send 12 volts to the ESCs which then power the motor with 12V but I then fear 12V to the ESC would overpower the RC servo via the battery eliminator circuit wire which might have 12 volts going through it.

The RC Servo says input of 4.8 to 6 volts and I fear I dont want to connect 12 volts to the ESCs while using the battery eliminator circuit. So I suspect I need to disconnect the BEC and power the RC servo off the 6 volt battery.

If I connect a 12volt battery to the ESC, does the battery eliminator circuit to the Servo step the voltage down to 6 volts or will I cook the servo if I hook the ESC to 12 volts? I suspect it will and that the solution is to run a separate 6 volt power to the Servo and run 12 volts to the ESC/Motors.

I greatly appreciate your help. I am building an art project using the components above and dont have a lot of money in my budget for experiential learning from failure.

Thank you

[cbenson]

I have two brushless motors, two 20A Multicopter ESC, a 4.8-6V RC Servo and a 6 volt golf cart battery.

The RC servos are entirely unrelated to the ESCs; you should not use an ESC with a normal servo. You need an RC servo controller.

If I connect a 140 amp 6 volt golf cart battery to the two 20A ESCs, am I going to cook the ESCs?

A battery only provides as much current as is requested of it. If you see 140A, that is likely the maximum discharge rate which the battery can provide.

Secondly, I want as many RPM to the motor which in my understanding means that 12 volts would be twice as fast as 6V.

Apply 12V to a normal 4.8V to 6V motor will destroy it.

If I connect a 12volt battery to the ESC, does the battery eliminator circuit to the Servo step the voltage down to 6 volts or will I cook the servo if I hook the ESC to 12 volts?

The BEC provides 5V and normally around 1-2A which is used to power electronics. The ESC itself can likely be hooked up to 12V, but you should not be providing 12V to the servos.

I suspect it will and that the solution is to run a separate 6 volt power to the Servo and run 12 volts to the ESC/Motors.

Right now you seem all over the map, with parts which are not really compatible with one another, and making any connections at this point may destroy the products you have. Please provide as much information as you can about the project, what you want to do, what parts you have and what parts you are considering.

[precious-2]

I have a working model. Thank you for your input. It’s the beginning of something very cool. If I could post a video here, I would. I have discovered that the esc’s put out 5 volts through the battery eliminator circuits even though the input is 12 volts. Nothing got fried, score one for the new guy!

[cbenson]

You can upload a video to YouTube and post the link here (or embed it). Alternatively if it’s not too large, add it as an attachment.