ESC Recommendations, help needed

[Alfa Spirit]

Hi,

I need two HV esc' s for outrunner motors. Stator poles = 12 and Motor poles = 8.

8S batteries and 1250kV motors, so 37000 RPM Max.


ROTORSTAR 21.jpg

[willy43]

2 Hobby Wing SeaKing 130A High Voltage v3

[Alfa Spirit]

2 Hobby Wing SeaKing 130A High Voltage v3

Can a Seaking 130 drive a 8 poles motor at 37000 RPM ?

[Fluid]

The HW specs don’t say the maximum switching rate and an 8-pole motor at 37,000 rpm requires a high rate. But the problem I see is the motor Kv choice - that is excessive rpm for a large outrunner. The case will be under too much stress; I don’t know any motor maker who condones such a high rpm.

BTW, why do we never see any of Alfa’s builds running? The build pics usually look great. Enquiring minds want to know...


.

[Alfa Spirit]

The HobbyKing YEP 180A HV (4 ~ 14S) Marine Brushless Speed Controller can drive a 2 pole motor at 240 000 RPM, I don' t know this esc.

[willy43]

I am running a Scorpion 4035/800 Kv on 10 S very reliable !!Water cooled on the mounting side and blower on top, and is all in the green even, in south Florida !!

[Fluid]

I am running a Scorpion 4035/800 Kv on 10 S very reliable....

I?m very happy for you, but that is only 23,000 rpm. The OP wants to turn 37,000 rpm, 60% more rpm than your motor. Apples and oranges.


.

[Alfa Spirit]

No, 30 000 RPM (37 x 800) and the Scorpion 4035 is 10 poles. I will send an e-mail to Hobby Wing.

[Fluid]

Ooops. Yes, so you’re only running 25% higher rpm than he is - still way too high. But you know what you know...



.