What am I doing wrong - RC-Monster Forums

MetalMan · 08.31.2009, 02:35 AM

starscream is referring to the undergeared condition, which, IMO, seems to be the case. Typically in these setups the ESC should heat up pretty comparably to the motor, so low ESC temp/high motor temp is often indicative of too little load.

Too little load means that efficiency won't be in the "sweet spot", so more energy will be wasted as heat.

starscream · 08.31.2009, 04:29 AM

Thanks for clarifying metalman, sorry my description was not very helpful

Brushless configurations can be a bit of juggling act. In order to configure an efficient BL system there are several factors to consider such as proper voltage/motor kv/gear ratio etc.

Brushless motors require a certain amount of load to run efficiently. If your setup does not provide adaquate load you may experience an increase in motor heat.
In turn, if you are over geared (demanding more power from the system) you will experience higher ESC and battery temps.

In general
If your ESC/Batts are hot but the motor temps are OK then gear down or descrease the ESC motor timing to reduce the motor load
If the Motor is hot but the ESC/Batt temps are OK then gear up or increase the ESC timing to increase the motor load.
If the ESC/Batts & Motor temps are hot then you got major problems

You can always try gearing down but watch the temps. (as a burned up motor is no fun)
Let us know how it goes

Ryu James · 08.31.2009, 05:30 AM

since there is already a thread on it i figured i should ask. i have been having some issues in the heat dept. also. well, not completely but i want to get my temps a little lower if possible. i was running a Neu 1515 1y on 5s in my 8b. gearing is 16/46. when racing temps were always around 130 on motor, 130-140 on esc and 100 on batts. which is where i like everything. now i have switched to a hacker c50 7xl 1973 kv. i ran the same gearing and have just been running on the street so far. today temps got to 135 on the motor. so i am concerned on race night its gonna get closer to like 150 or more. which i really like to see my motor temps around 130 and not much hotter than that. is there anything i can do to get my temps down a bit with this new hacker motor? i am using the Neu for a truggy so i only have the hacker to run in my buggy.

also, if anyone can help with this. i like to use a clutch but when i do temps shoot up 20-30 degrees making me uncomfortable. i can drive with clutch or pinion but if i had a way to use a clutch and get temps around 130 i would. anyone out there using a clutch and seeing these temps on a buggy/truggy? what is your setup? i have only 5s packs too so my setup has to be configured for 5s.

starscream · 08.31.2009, 01:55 PM

Quote:

Originally Posted by Ryu James

since there is already a thread on it i figured i should ask. i have been having some issues in the heat dept. also. well, not completely but i want to get my temps a little lower if possible. i was running a Neu 1515 1y on 5s in my 8b. gearing is 16/46. when racing temps were always around 130 on motor, 130-140 on esc and 100 on batts. which is where i like everything. now i have switched to a hacker c50 7xl 1973 kv. i ran the same gearing and have just been running on the street so far. today temps got to 135 on the motor. so i am concerned on race night its gonna get closer to like 150 or more. which i really like to see my motor temps around 130 and not much hotter than that. is there anything i can do to get my temps down a bit with this new hacker motor? i am using the Neu for a truggy so i only have the hacker to run in my buggy.

also, if anyone can help with this. i like to use a clutch but when i do temps shoot up 20-30 degrees making me uncomfortable. i can drive with clutch or pinion but if i had a way to use a clutch and get temps around 130 i would. anyone out there using a clutch and seeing these temps on a buggy/truggy? what is your setup? i have only 5s packs too so my setup has to be configured for 5s.

What ESC are you running?
Did the temps of the ESC and batts change after you switched to the Hacker?
I would presume the ESC temps went down so I would recommend trying a 17T pinion

brushlessboy16 · 08.31.2009, 10:24 PM

Quote:

Originally Posted by starscream

Thanks for clarifying metalman, sorry my description was not very helpful

Brushless configurations can be a bit of juggling act. In order to configure an efficient BL system there are several factors to consider such as proper voltage/motor kv/gear ratio etc.

Brushless motors require a certain amount of load to run efficiently. If your setup does not provide adaquate load you may experience an increase in motor heat.
In turn, if you are over geared (demanding more power from the system) you will experience higher ESC and battery temps.

In general
If your ESC/Batts are hot but the motor temps are OK then gear down or descrease the ESC motor timing to reduce the motor load
If the Motor is hot but the ESC/Batt temps are OK then gear up or increase the ESC timing to increase the motor load.
If the ESC/Batts & Motor temps are hot then you got major problems

You can always try gearing down but watch the temps. (as a burned up motor is no fun)
Let us know how it goes

Ill try gearing down, and bumping timing up. or different combonations of the two