Burnt up 180A v3 hobbywing ESC?

[mihelone]

Good evening everybody. since I do not want to open a new thread, I continue on this one.
I have an osprey running on a leo 4082 1800 kv,seaking 180a v3 esc, 2x5000 mah pararel 40c lipos and an octura m445prop.
Yesterday I test run the boat the motor kept cutting for small periods, ie for 0.5 second.
After returning home I removed the esc and I saw that the diode in the cap bank on the power cables was cut horizantally in 2 pieces (diode data can be seen in the attached photo).
I think that this was the cause of the motor interupting.
The question is if I can run the esc without the diode .
Thank you in advance,
Demosthenis

[Mxkid261]

I was running a 40mm 3 blade CNC from the OSE store, maybe this was too much prop?

[Mxkid261]

Which type of capacitor do I need? How is a 1000uF 35V 20% radial-lead electrolytic capacitor from radioshack?

[ray schrauwen]

I didn't know there was a diode in there???

Now, I'm not sure how to advise.

Are you sure it's a diode and not a capacitor or resistor?

Mxkid, you can us that capacitor only for a quick test. We need to find out exactly what that extra component is. We should ask Dr. Wayne.

[mihelone]

I didn't know there was a diode in there???

Now, I'm not sure how to advise.

Are you sure it's a diode and not a capacitor or resistor?

Mxkid, you can us that capacitor only for a quick test. We need to find out exactly what that extra component is. We should ask Dr. Wayne.

Good morning.
Its a diode, what is writen on it is PJ4196 SX34. Asearch in wikipedia showed that its a Schottky diode.
I removed it and the esc works fine. I am going to test on water later today and report the results....

[tlandauer]

The V3 has this diode, that is part of the bulge on the wires. Replace the whole thing with a cap bank, the stock ones will need any help they can get.

Sent from my D6708 using Tapatalk

[Mxkid261]

Ok so thats a diode soldered to the capacitors on the wires?? I removed the capacitors from the ESC body and they were puffed and one had a crack. Im just trying to find something from radio shack to just test this ESC quick before I go wasting money on a nice cap bank. This is what I was looking at but Im not sure if it will work? Thanks http://comingsoon.radioshack.com/100...r/2721032.html

[mihelone]

The V3 has this diode, that is part of the bulge on the wires. Replace the whole thing with a cap bank, the stock ones will need any help they can get.

Sent from my D6708 using Tapatalk

After the test 'flight' I have all the replies I needed.
The small cuts in the motor's operation occurred due to a defective receiver antenna, almost cut from the receiver's pcb. I replaced the receiver and all went smooth.
I continued testing after the replacement and what I noticed was that the ESC cut after 2 or 3 minutes of mild game. After cutting it began nipping. I assumed that something was going on with the esc's bec so I put an external bec with a 2s 800 man lipo. Tested again with a pair of fresh lipos and everything was fine and the ESC ran cooler too. So what I can say is similar to what is written in previous posts: do not use the esc's bec.....and I don't think that the diode has a serious job to do there.
Please the most experienced comment on this so as we become better and more wise...
PS: I have already replaced the 2x370 uf caps on the power wires with 2x1000 uf ones....if this means something.

[ray schrauwen]

Ok so thats a diode soldered to the capacitors on the wires?? I removed the capacitors from the ESC body and they were puffed and one had a crack. Im just trying to find something from radio shack to just test this ESC quick before I go wasting money on a nice cap bank. This is what I was looking at but Im not sure if it will work? Thanks http://comingsoon.radioshack.com/100...r/2721032.html

That will work for a quick test. Make sure the capacitor is wired in correctly with white negative side on black wire or it will pop in a bad way as soon as you plug in a lipo.

[kfxguy]

After the test 'flight' I have all the replies I needed.
The small cuts in the motor's operation occurred due to a defective receiver antenna, almost cut from the receiver's pcb. I replaced the receiver and all went smooth.
I continued testing after the replacement and what I noticed was that the ESC cut after 2 or 3 minutes of mild game. After cutting it began nipping. I assumed that something was going on with the esc's bec so I put an external bec with a 2s 800 man lipo. Tested again with a pair of fresh lipos and everything was fine and the ESC ran cooler too. So what I can say is similar to what is written in previous posts: do not use the esc's bec.....and I don't think that the diode has a serious job to do there.
Please the most experienced comment on this so as we become better and more wise...
PS: I have already replaced the 2x370 uf caps on the power wires with 2x1000 uf ones....if this means something.

1) I always replace that dinky little cap bank on the wires with a real cap bank.
2) I don't use the built in bec for the same reason you experienced. It's easier on the Esc to not use it.

[Mxkid261]

Awesome I will give that a try and report back later when I bench test it. What size lipo do you recommend for an external BEC?

[mihelone]

Awesome I will give that a try and report back later when I bench test it. What size lipo do you recommend for an external BEC?

I use a 2s 800 mah lipo, its just a receiver and a servo to power...its ok for a rc boat.

[mihelone]

Or you can either attach 2 cables on your main power cables which will go to the external bec, so no aditional battery this way. This method is ok if i.e your received is near your esc's main power cables...Your choice.

[Mxkid261]

What do you mean by "near" my ESC's main power cables? Like in close proximity to them? Thanks for the replies

[mihelone]

Yes, in proximity, as you don't have to have a long cable from the ESC cables to the bec and the receiver.