Esc cutting out

[blindpew]

I have fitted a 3674 2200kv motor with 5s lipo,s and a 120amp hobbywing esc to my Miss Geico.Is
this esc to small for this set up because it keeps cutting out.When it cuts back in the boat runs at reduced speed until the esc is switched off and on again.I know nothing about electrics so any help would be much appreciated.

[Prodrvr]

You can try turning down the lvc to maybe 3.2v and test. I personally wouldn't run less than a 180 in a fe boat.

[R2315]

I don't know much about that boat but I would say the 120amp esc is not enough for 2200kv on 5s even on 4s it would be undersized. Sounds like you hitting the LVC, when you programed the esc what settings did you input? 2200kv motor is probably better suited for a 4s setup.

Motor%20KV_Batt.jpg

[Prodrvr]

You can run a 2200 on 6s all day, the esc is not enough for a 2200 on 5s. Ran a 2075 on 6s once with a 120 and would come in way too hot. Changed out to a 180 and all was good.

[blindpew]

Thanks for the replies I will upgrade to a 180 esc.

[CraigP]

You can try turning down the lvc to maybe 3.2v and test. I personally wouldn't run less than a 180 in a fe boat.

I'm running a 150A on a 34" hydro on 8s with a M445 to 645. I'm running under 100A, hitting high 50's to low 60's, turning laps. I think an ESC is closely linked to the overall setup. Although a 180 is safe, it's not always required. You should find out what is required for your hull. I use datalogging...

[Prodrvr]

I'm running a 150A on a 34" hydro on 8s with a M445 to 645. I'm running under 100A, hitting high 50's to low 60's, turning laps. I think an ESC is closely linked to the overall setup. Although a 180 is safe, it's not always required. You should find out what is required for your hull. I use datalogging...

Which esc? Which motor?

[Luck as a Constant]

Turn your lvc down. Simple.

[CraigP]

Which esc? Which motor?

It's got a SW 150A Pro+ HV ESC, the current motor (small motor) is a Leopard 4074 1050kv. I'm working on driver skills right now, Feeling better each time I go out. The next motor is Leopard 4082 1250kv, it's just waiting in a box... I'm going to try a 4s setup for possible PSport Hydro, and I have a TP 4050 2310kv and SW 220A Pro ESC. I use a Eagle Tree data logger on all the setups.

Currently, the 8s setup is four, 2s 7200mah batteries in series.

[CraigP]

Turn your lvc down. Simple.

Could be a sign of a batt going bad, dropping too many volts under load. If your LVC is 3.1V or less, it's probably a battery... Also, some have high temp cut-off too.

[Prodrvr]

It's got a SW 150A Pro+ HV ESC, the current motor (small motor) is a Leopard 4074 1050kv. I'm working on driver skills right now, Feeling better each time I go out. The next motor is Leopard 4082 1250kv, it's just waiting in a box... I'm going to try a 4s setup for possible PSport Hydro, and I have a TP 4050 2310kv and SW 220A Pro ESC. I use a Eagle Tree data logger on all the setups.

Currently, the 8s setup is four, 2s 7200mah batteries in series.

DF hydro?

[CraigP]

Yup, 34"... With new sponsons on it, it has proven to be a very stable boat. Handles the speed just fine. It's slow out of the corners, she's a thick one, weighing in at almost 11.5lbs. Now it needs more torque off the corners. The boat is just starting to feel slow to me, soon I'll step up the motor. Little motor, batts and ESC run nice and cool with M445. When I go to M545, batts and motor start to get pretty warm, about 125-130... Motor is only rated for 90A. With the 445, it's running 54mph top speed, running laps. I don't do just straight runs

[Prodrvr]

Cool. Been looking at that boat. I've just got way too much on the bench now. Maybe next year.

[Luck as a Constant]

Could be a sign of a batt going bad, dropping too many volts under load. If your LVC is 3.1V or less, it's probably a battery... Also, some have high temp cut-off too.

Yeah well, if dropping the lvc works then the batteries are probably ok. I always set those things to 2.8v. Under load voltage is slightly diffeeent from actual voltage, and won't really damage battery from over discharging considering the actual resting voltage will still be higher than load voltage after cutoff. If that makes any sense lol
Or just get an external lvc and do away with the built in one on those esc which are known to have issue.

[CraigP]

You're right on point! In the servo industry, we call it burden voltage, whether it's a battery or the load droop off a rectifier circuit. I think these LVC's have values that are too high. But here's the rub. Someone is going to run the boat slower, not punching the throttle or run wide open the whole time. So each boater has to understand how they are running on the batteries. If you run easy, then the values should be higher. If you're going all out, then drop them down, or disable and use your trusty timer.

The real test is how much mah your putting back in the battery when you recharge. For example, if you're running 5200mah battery, you want to discharge no more than 80%, unless you get batts for free (I don't). So you should be hitting about 4100-4200mah on recharge. The LVC just isn't as accurate as timing it, if you drive consistently.