Amp draw of a Neu 1515 - 1Y - RC-Monster Forums

gramey · **Amp draw of a Neu 1515 - 1Y -** 08.11.2008, 04:34 PM

Is anyone able to tell me what amps a Neu 1515- 1Y draws, I tried looking on the Neu website but I couldn't find a list of tech specs for their motors.

BrianG · 04:45 PM

From what I can tell from most motor manufacturers, they seem to rate it using the following procedure:

1: Get the max continuous rpm. The 1515 is good for 60k rpm.

2: Get the motor kv. The 1515/1y kv is 2200.

3: Get the working voltage using the max rpm (step 1) and motor kv (step 2). 60,000 / 2200 = 27.27v.

4: Get the motors max continuous power rating. The 1515 is rated 1500w IIRC.

5: Figure out the max continuous current using the working voltage (step 3) and max power (step 4): 1500w / 27.27v = 55A.

Don't forget, this is a continuous rating. Depending on a lot of factors, the current can be more or less. No matter what, the motor will pull at least twice that value for initial bursts (starts and accleration), and pull less than that to maintain speed.

gramey · 08.11.2008, 06:19 PM

Thanks for taking the time to put in such a detailed reply, I ordered an MGM 16018 esc which as the model suggests is rated at 160 amp continuous draw and I was just wondering if I should have ordered the 224?

mxracer · 08.11.2008, 08:18 PM

160 amper will be fine , im running 1y on a mamba max on 5s , thats only rated at 100amps

GriffinRU · 08.11.2008, 09:54 PM

Quote:

Originally Posted by BrianG

From what I can tell from most motor manufacturers, they seem to rate it using the following procedure:

1: Get the max continuous rpm. The 1515 is good for 60k rpm.

2: Get the motor kv. The 1515/1y kv is 2200.

3: Get the working voltage using the max rpm (step 1) and motor kv (step 2). 60,000 / 2200 = 27.27v.

4: Get the motors max continuous power rating. The 1515 is rated 1500w IIRC.

5: Figure out the max continuous current using the working voltage (step 3) and max power (step 4): 1500w / 27.27v = 55A.

Don't forget, this is a continuous rating. Depending on a lot of factors, the current can be more or less. No matter what, the motor will pull at least twice that value for initial bursts (starts and accleration), and pull less than that to maintain speed.

I will disagree,
Maximum current is at stand still or lowest RPM not at max RPM. You will never see 55A at 60000RPM with 1515/1y running at 27V.

Maximum current for Neu 1515/1y is 110A
Running current with rated load should be around 40-55Amps.

Better picture can be obtained from motorcalc or my program.

I can publish rated current for all motors if required.

BrianG · 10:28 PM

You can't disagree!

Just kidding.

Without knowing what load the user is placing on the motor, numbers are meaningless. Nor did I say the max current will be 55A. I derived the voltage by the kv and max rated rpm. Then, I derived the current by the power rating and the calculated voltage. This was just to meet the rpm and power limits. With the proper load, the current could very well be 55A @ 27v @ 60,000 rpm. You even said so yourself; "Running current with rated load should be around 40-55Amps.".

I then went on to state that the max current will be at least twice the 55A, which is 110A, which is the max rated current that you pointed out. I also stated the normal running current will be far less. Both these max and running currents will probably not be at 60,000 rpm and 27v... I guess I forgot to make that distinction. My bad.

What's_nitro? · 08.11.2008, 10:33 PM

Whoa whoa whoa- Did GriffinRU just get pwned by BrianG? I think we have a new brushless heavyweight champion!

Just kidding around, you were both right. Of course...

BrianG · 08.11.2008, 10:36 PM

No no no, you can't look at it that way. It's just clarification!

And BTW, I think Griffin could "pwn" me anytime he wanted to. His level of knowledge exceeds mine by a substantial margin...

And I resent the "heavyweight" remark. I'm not overweight, just undertall...

What's_nitro? · 08.11.2008, 10:42 PM

LOL Brian, I've never seen a pic of you.... You mean to say "big-boned"?

BrianG · 08.11.2008, 10:44 PM

Yeah, big boned, that's it! Let's just say it doesn't appear that I miss too many meals.

What's_nitro? · 08.11.2008, 10:50 PM

So- call you BrianG, but don't call you late for dinner?

I put away more than my fair share as well. It's only my youthful metabolism that keeps me in shape!

GriffinRU · 08.11.2008, 11:52 PM

:)
You get Amps or RPMs not both, that is what I was trying to say...

I can be wrong as well, but it is alright to have support from the rest!

BrianG · 08.11.2008, 11:57 PM

lol, two ways of saying similar things and each not knowing what the other is trying to say.

What's_nitro? · 08.11.2008, 11:57 PM

^

GriffinRU · 08.12.2008, 12:20 AM

Quote:

Originally Posted by BrianG

lol, two ways of saying similar things and each not knowing what the other is trying to say.

Just want to make sure that motor is rated by voltage, current and power. You can get the same power playing with volts and amps across efficiency curve, but you cannot exceed rated current. That is what I was trying to point out.

And numbers are not meaningless they just hard to interpret with out testing or knowledge of what to expect.

My program plots motor curves at full load.