Aug 04, 2017, 01:39 PM
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Harryw007 | |
Harryw007 Harryw007 Thread OP | Discussion Hello. Im wondering if my rc car that has a 3215kv motor is fine to use with a 60 amp esc. Im going to be using a 3S 5500mah battery with a 35C discharge rate and Im going to be using my dragster a lot (60 mph passes with lots of braking until the battery goes flat). My old ESC just recently smoked out on me, almost taking my battery with it so Im wondering if 60 amps is enough or if I should get a 120 amp esc instead. Thanks in advance! P.S: here is the old ESC I had: http://www.amerang.co.uk/Replacement...shless-esc-set |
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Aug 05, 2017, 05:21 AM
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Jym73 | |
Jym73 Car Bashing | Hi and wlecome here, I would put a 80a esc to use a 3215Kv motor on 3s. |
Aug 05, 2017, 08:24 AM
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Jim85IROC | |
Jim85IROC Registered User | Unless you have a real heavy vehicle or a real high kv motor, it should be fine, especially if you gear appropriately. Running higher voltage won't draw more current, and in fact since you're going to use less throttle for a given speed, you will actually use less current under most conditions than you would with 2s. |
Aug 05, 2017, 11:01 AM
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Jym73 | |
Jym73 Car Bashing | If we talk about a 60A-sl esc, then 3215kv on 3s is too much imo. |
Aug 06, 2017, 11:30 AM
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RustyUs | |
RustyUs User Registered | A quality 60A ESC will be fine on 3S...within reason, and as stated above with weight/motor kv concerns. |
Aug 06, 2017, 03:17 PM
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Jym73 | |
Jym73 Car Bashing | For me, i prefer have more margin, even with a quality esc |
Aug 06, 2017, 04:15 PM
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Bige4u | |
Bige4u Digital Ripper | For 1/10th scale motors, i use only one ESC... Link - http://www.ebay.com/itm/Hobbywing-EZ...id=p5731.m3795 Best to get the esc and program card together.... cheaper than buying seperately. |
Aug 13, 2017, 07:02 AM
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Kaiserchief | |
Kaiserchief Going berzerk | More is always better in this regard. A 120 Amp ESC will also heat up less, and waste less power in heat, meaning you'll gain some speed. |
Mar 25, 2018, 01:24 PM
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Kendo 1 | |
Kendo 1 Registered User | I have a 3800kv motor and I think esc is 60amp could I run a 3s battery instead of 2s if not what amp esc would I need to run 3s lipo battery.Thanks |
Mar 25, 2018, 03:26 PM
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nowinaminute | |
nowinaminute Dave | A lot of it depends on the motor, vehicle weight, driving conditions etc. More voltage alone won't necessarily mean more current and can mean less in some circ*mstances but not's not a hard and fast rule. A light 2wd buggy with a 3000kv motor on 3s will draw less current than a monster truck with a 5000KV motor. To achieve a given RPM, you can use current or voltage. The lower the voltage the more current is needed and vice versa. Many people with larger vehicles run very low KV motors at high voltages because it's more efficient and thermally manageable compared to a motor that runs at a low voltage but draws massive currents. For what it's worth, I often hear of people running circa 3000KV motors on 3s with 60a controllers. From a personal perspective, I have run a 3300KV on 3s in a Grasshopper and a 3000KV on 3s in an HSP Monster truck both using a 60A hobbywing. Those cheap GoolRC units seem to work ok on 3S too. But again, a lot of it depends on the load it will be put under. |
| | Last edited by nowinaminute; Mar 25, 2018 at 03:36 PM. |
May 03, 2020, 11:35 PM
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funcentric | |
funcentric RC Dad here. | Let's do the math. A 5500mah 35C rated battery will be good for 192.5 amps (5500 x 0.001 x 35). So you're plenty good there. The higher the mah rating, the lower the C rating and visa versa. The higher the C rating, the lower mah of a battery you can get away with to support the same amperage. With 5500mah, you can go as low as a 20C which would still offer you over 100amps. If you're set on a 35C rated battery, you can go as low as 2200mah, but no less than that b/c the amperage would be too low and it would stress the battery. You didn't specify the amp rating of your 3215kv motor, but I'm guessing it's 60amps. From my data a 3900kv motor runs 69amps, a 3300kv at 66amps. You'll want some space, maybe 20% for burst, so something that can handle 72amps (60x1.20). So 60amp ESC is too small. You'll want something closer to 80amps. 120amps may be overkill but I know 80amp ESC's are more rare. |
May 05, 2020, 07:32 AM
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JerryRigged | |
JerryRigged Have you seen my LVC? | What size motor are we talking here ? I have a 2838 motor that runs 3s all day on a 45a ESC... I have a 3660 motor that cooks a 80a ESC to 160f-180f every run (cheap china ESC). Yeah, I saw the 3215KV, that is kind of the middle zone were it could be a small motor or a big motor or even a outrunner... What kind of motor are we dealing with here? |
May 07, 2020, 10:54 AM
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pdooley | |
pdooley rc user | Quote: Originally Posted by Bige4u For 1/10th scale motors, i use only one ESC... Link - http://www.ebay.com/itm/Hobbywing-EZ...id=p5731.m3795 I use that same ESC. |
Sep 16, 2020, 07:18 AM
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Dandare76 | |
Dandare76 Registered User | I have a 1/14 buggy with a 60a ESC and a 5200kv motor, I will say, I am new to this ..like this month new. I've read all the jargon on what this, what that and my head's spinning...lol |
Sep 17, 2020, 02:25 AM
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funcentric | |
funcentric RC Dad here. | LiPo is lithium polymer, the battery type. As opposed to Lithium Ion or NiMH these days. Your buggy since it has a 60amp ESC most likely runs on a LiPo. Budget RC's typically come with Lithium Ions and their ESC's are that big. S means how the cells of the battery are connected, generally in series. So 2S means 2 cells connected in series. 3 is 3 cells connected in series. When cells are connected in series, you add the voltage. When cells are connected in parallel, you add the mah. Think of voltage as power and mah as juice. As far as your ESC. I assume it's the stock setup which you should be fine with. Just don't use more cells than it was designed for originally. I don't know the size of your motor, but a 3650 sized 5200kv motor can draw about 95 amps. If you have a 60 amp ESC, it may be one of those combo units that are being sold by manufacturers that have a much lower amp rated ESC than safely required. Either that or you have a much smaller sized motor that somehow manages to pull less than 60amps even though it's rated at 5200kv. If you're really running a motor that can draw 95 amps, you need a battery that can support that much amperage. The formula to calculate is mah x c rating x 0.001. So a 1000mah 100c battery (doesn't matter the voltage) has an amp rating of 100amps. A 5000mah 20C battery also can support 100amps. |
