motor/kv/ system question

[_paralyzed_]

Originally Posted by _paralyzed_

why?

you simply wouldn't want to run a brushless setup with your epa turned down. As stated before it's rough on the esc and causes heat. You wouldn't buy a corvette and unplug 2 spark plugs, it just doesn't make sense.

[lincpimp]

Originally Posted by _paralyzed_

You wouldn't buy a corvette and unplug 2 spark plugs

Yeah, they barely run as it is!

[littlegiant]

Originally Posted by _paralyzed_

you simply wouldn't want to run a brushless setup with your epa turned down. As stated before it's rough on the esc and causes heat. You wouldn't buy a corvette and unplug 2 spark plugs, it just doesn't make sense.

Is the EPA setting relative to the kv rating of the motor?

case 1: A 4000 kv motor at 4S EPA 100%. Motor has max efficiency at 40k rpm. The rotor will be turning at 59.2K rpm which obviously is going to heat up the motor and possibly over work the esc.

case 2: The same motor at 4S at EPA 67.5%. Assume that the motor is running at 40K rpm which is at the max efficiency rpm. Motor will be running cooler and not overloading the esc.

Will the above be true?

[_paralyzed_]

Originally Posted by littlegiant

Is the EPA setting relative to the kv rating of the motor?

case 1: A 4000 kv motor at 4S EPA 100%. Motor has max efficiency at 40k rpm. The rotor will be turning at 59.2K rpm which obviously is going to heat up the motor and possibly over work the esc.

case 2: The same motor at 4S at EPA 67.5%. Assume that the motor is running at 40K rpm which is at the max efficiency rpm. Motor will be running cooler and not overloading the esc.

Will the above be true?

its just a silly backwards way of doing things. you first figure out what batteries you will run, then match your motor kv to that. If you're overvolted get a smaller battery, don't turn your epa down to compensate.

[littlegiant]

Originally Posted by _paralyzed_

its just a silly backwards way of doing things. you first figure out what batteries you will run, then match your motor kv to that. If you're overvolted get a smaller battery, don't turn your epa down to compensate.

Now that u mentioned it, will it work well by compensating with EPA values down?

Will it cause any damage to the system? Will the esc work harder with a lowered EPA setting to meet a specific range of motor rpm? I mean as compared to the same rpm range of a system with 100 EPA but with lower cell count. If the motor to be used is identical in both setups.

I was thinking that as long as the motor is being operated at its recommended range of RPM for good efficiency, the cell count or epa value doesn't matter. Please correct me on this. Thanks.

Any explaination as to y it is not recommended to compensate by reducing EPA values other than that the esc could be working harder?

[_paralyzed_]

I can't give you a technical explanation, but partial loads on the esc are what heat it up. Allowing the esc to be "wide open" and just flow power is less stressful on it. Turning down your epa effectively makes your esc a partial load at alll times and isn't good for it. I wish I could give you technical terms and what not, but this is my farmboy answer.