ESC on fire MGM

[T.S.Davis]

I have 5 MGM 280 esc. They are in my scrap box with. Utterly unreliable. Only had one burn though. They didn't warranty that one.

That said, when your shaft failed it likely damaged the esc. Leaving the power too a damaged esc can go badly under the best of circumstances. Turning the switch off may have meant nothing to it as it was already injured so to speak.

[RaceMechaniX]

I know some of you guys have had bad experiences with the MGM's, but mine have been pretty reliable and I have yet to burn one up.
I did learn early on the MGM's are more finicky with certain motors compared to others.
Lehners and MGM's are very reliable combo's however MGM's are low wind 4-poles are not terribly reliable. This is particularly true for 0.5Y's and 1D motors from Neu and low wind number TP's and Leopards.

If you guys are running 4-poles I suggest modified Castle 200's.

In the OP's situation I agree with Terry, the damaged cable likely caused a massive current spike damaging the ESC before it could protect itself.
What wind 2250 are you running?

[vvviivvv]

This i something i experienced, my AS26-150 ran terrible with NEU motors, with Lehner's they are beautiful...

slightly annoying as i cant use a Tp4070 with one to save some costs...

[fweasel]

however MGM's and low wind 4-poles are not terribly reliable. This is particularly true for 0.5Y's and 1D motors from Neu and low wind number TP's and Leopards.

Terry, do you consider 3Y 4-poles a low wind? Not sure how that scale would progress.

[meangenesracing]

I unfortunately have submerged my MGM 400/63 twice for maybe 2 minutes and still going strong. Why you may ask lol. My T mono is so fast I'm having trouble keeping it on the water

[eXoNerated]

Half and quater turns in a fractionally slotted concentrated wound motor has lower induction then the Lehner. The sinus MGM drive needs more pwm to run the short coiled motor it does not have. A sinus alroth also take more processor speed so when you run high pole counts the commutation seqence runs out speed and performance quicly declines. The choice controller TODAY to run with a NEU is APD now. I showed Steve the prototype controllers he's tested them and then adopted it into their sales. Ask Gerben The F5D world champion won't go back to castle inverters after trying this. The brake and throttle response is all better and this is from the world champion pilots who pull in excess of 10kW often in their geared setups. You see the fets carry alot of copper with the high pin count. Naturally they are the most power dense inverters in the industry. A mil spec drive. Give me a chance and I'll show you a scope capture of how a sinus drives runs past it commutation speed and the pulse train begins to lose its definition. The 120 and 200 amp 12s APD drives are not a god awful in price either. You dont have to consider them but if you want the most current drive tech this is it. The other are the open source BLheli inverters . They are more capable than an marine specific controllers which the industry still hasnt got right for us. We really dont need sophistication . Boats need torque thus we need amps. The companies keep making 200 ampere drives but most of us are averaging 150-180 so a CHEAP 400 ampere drive thats not too huge would be a good place for heavy competitors. With the advent of SiC components drive technology should move ahead in leaps and bounds.

https://neumotors.cartloom.com/storefront/product/brushless-motor-controllers



Regards,
Hubert