Puma Motor winding resistance

[rhubarb]

Just hooked up my puma motor to a crystallite controller and it immediately fried the controller

Measured the winding resistances which all seem to be about 0.2 ohms. Is this low? Could there be an internal short?

Motor to controller wiring was
Blue : Green,
Green : Yellow
Yellow : Blue
Hall effect wires to same colors
which I believe is correct.

Thanks for any advice!

 

[Jozzer]

Ahh, I see where your info came from now
This is the first 20A controller/puma blowout I've heard of...
Since my controller has survived 30A@84v for a long time now, i'm hoping the Puma wont upset it too much! The 408 i was running till now though sadly died of overheating I fear.....due to that damned handbrake mania! (takes rear brake of KMX and curses it!)

 

[Lowell]

0.2 ohms doesn't sound unusual. What let go inside the controller?

 

[fechter]

I'm not sure if the motor wiring is correct. I think Maytag figured it out at one point. The winding resistance is extremely low.

With the controller disconnected, the motor should turn backward with minimal resistance. If a winding was shorted, it would be very hard to turn backwards.

 

[rhubarb]

Hi Jozzer... I also curse my KMX's rear brake- I had no trouble before I fitted it, but since then I've fried four controllers and mangled a puma.

 

[The7]

Just hooked up my puma motor to a crystallite controller and it immediately fried the controller

Measured the winding resistances which all seem to be about 0.2 ohms. Is this low? Could there be an internal short?

Motor to controller wiring was
Blue : Green,
Green : Yellow
Yellow : Blue
Hall effect wires to same colors
which I believe is correct.

Thanks for any advice!

It seems that the color code and phase sequence and phase relationship are not consistant agmonst manufacturors.
What a shame!