1515 2200kv heat issues in buggy - RC-Monster Forums

Manne · 10.11.2010, 07:13 AM

Check your solderings and connectors, a connector that is old and worn will work like a resistor. Maybe you are undergeared? My Erbe were running hot when it was geared for 40, geared up to 45 and problem solved... These 4pole motors don´t like to rev high they like to work with the torque. I hope you will solve the problem.

nuz69 · 10.11.2010, 07:30 AM

Quote:

Originally Posted by Manne

My Erbe were running hot when it was geared for 40, geared up to 45 and problem solved... These 4pole motors don´t like to rev high they like to work with the torque. I hope you will solve the problem.

I do not agree with this statement

. To really sense the effect of an undergeared motor, you need to gear it very very low (15-20mph), and be constantly on full throttle, like a motor pushed full throlle with no load. All the vehicle I see are running cooler with a lower top speed.

sikeston34m · 10.11.2010, 08:16 AM

Quote:

Originally Posted by nuz69

I do not agree with this statement

. To really sense the effect of an undergeared motor, you need to gear it very very low (15-20mph), and be constantly on full throttle, like a motor pushed full throlle with no load. All the vehicle I see are running cooler with a lower top speed.

I agree with Nuz69.

Higher gearing means more load, and usually means more heat.

KniteWulfe · 10.11.2010, 08:21 AM

i was wondering about my connectors too, especially the esc battery connector. Its possible I had a bad joint somewhere and it got worse with usage causing the low voltage issues and the cogging. I really don't think my gearing could cause cogging on this motor in a buggy.

I don't see how that could be the source of the heat issues though, but certainly should be investigated. It would be more probable than having 2 bad 4s packs and 4 bad 2s packs.

Still going to order some high quality packs, any recommendations between hyperion 5000 30c, polyquest 4500 42C or polyquest 5050 35C?

nuz69 · 10.11.2010, 08:46 AM

+1 on hyperion, 5000mAh 25C G3 is well enough for a 4S buggy ;) You said earlier that you have done the test with 2 different ESC + motor combos with same problem ? You should definitly check the batteries or the motor mount.

KniteWulfe · 10.11.2010, 09:15 AM

Quote:

Originally Posted by nuz69

+1 on hyperion, 5000mAh 25C G3 is well enough for a 4S buggy ;) You said earlier that you have done the test with 2 different ESC + motor combos with same problem ? You should definitly check the batteries or the motor mount.

Could you be more specific about checking the motor mount? I don't see anything out of the ordinary.

pinkpanda3310 · 10.11.2010, 09:26 AM

Quote:

Originally Posted by KniteWulfe

Could you be more specific about checking the motor mount? I don't see anything out of the ordinary.

A motor mount can flex under load. If it heats up enough it might flex more than usual. What is it made of?

KniteWulfe · 09:51 AM

Quote:

Originally Posted by pinkpanda3310

A motor mount can flex under load. If it heats up enough it might flex more than usual. What is it made of?

Ummm metal... Lol I am not sure it looks like cast aluminum. I put a brace under the motor and set the mesh a little loose and it didn't change anything. I doubt it's the mount but I'll find out for sure next weekend when I try it in my converted mbx buggy.

I was thinking, don't those temps on my 1800 seem a bit high too? I am pushing that motor a little on 17t but 16t is only about 36 mph.

Still doesn't make sense, I'm often getting higher maximum amps from the 1800 and less heat... But my friend who geared for the same speed in his xray with his 1800 had his spur smashed against the pinion and binding in his front diff and had about the same temps.

pinkpanda3310 · 10.11.2010, 09:23 AM

Quote:

Originally Posted by KniteWulfe

i was wondering about my connectors too, especially the esc battery connector. Its possible I had a bad joint somewhere and it got worse with usage causing the low voltage issues and the cogging. I really don't think my gearing could cause cogging on this motor in a buggy.

I don't see how that could be the source of the heat issues though, but certainly should be investigated. It would be more probable than having 2 bad 4s packs and 4 bad 2s packs.

If it was a bad connector then you would have more than one. It is the same problem with 2 different esc's and a number of batteries.