I have a 2208 gimbal motor. I measure 20R resistance between any two terminals.
How do I work out if it is delta or star? This is important for the phase resistance value determination.
Thank you.
As far as I know, the only ways to tell if the wiring is delta or star is to learn it from the datasheet, ask the manufacturer, or cut the motor open. Would be glad to be wrong, though.
Who’s the manufacturer?
It’s this one:
I’d rather not dismantle it as last time I did that it was the end of the motor!
Try it one way, and if it doesn’t act right, try the other.
With such high resistance, my money’s on star. If you can see the tail where the 3 wires are joined (usually covered with a short piece of heat shrink) through the gaps in the base, then it’s definitely star.
You may be able to get away with not knowing the resistance. If you have an encoder and use voltage/torque or voltage/velocity control, you don’t need it. Likewise if you have a current sensor and use full FOC control, you won’t need to know the phase resistance then either.
Yes, I am using FOC with the ACS712 current sensor and magnetic encoder.