number of poles on a 3phase motor?

[Noitoen]

The black part with the 3 screws/wires look like a half bridge rectifier used to power dc brakes to me. I think there is a label on the side

[Black Forest]

I just called the factory and the brake is 220v AC.

[Noitoen]

I just called the factory and the brake is 220v AC.

Yes, it's 220v AC powered, yes but it passes the little black device it changes to DC True AC motor brakes are 3 phase devices that look like flat motors.

[Noitoen]

AC rectified dc brake

[Peter.]

Umm - we use American RPM on this forum....

They say ignorance is bliss. You must be incredibly happy

[Black Forest]

For me it makes no difference what the brake actually uses for power. I only care about what I have to feed it!

[Black Forest]

They say ignorance is bliss. You must be incredibly happy

Now Peter stay nice. Those across the pond don't have our good looks and intelligence so we must stay tolerant of our neighbors. I am sure Skunkworks was poking fun at us.

[old mart]

Your best bet is to assume it is 4 pole, the commonest type, program that in and when the motor is started check the rpm. If it is 1500 approximately, at 50 Hz then you are good to go. Reprogramming is easy if the guess was wrong.
I would play safe with the brake and dissconnect it before setting up the VFD.

[Noitoen]

For me it makes no difference what the brake actually uses for power. I only care about what I have to feed it!

I just wanted you to know that you need that part and a relay to operate the brake case you have problems in future. I would still like a picture of the side to confirm if I'm right or wrong

[Black Forest]

I just wanted you to know that you need that part and a relay to operate the brake case you have problems in future. I would still like a picture of the side to confirm if I'm right or wrong

I will try to get a picture of the side.

[Black Forest]

The 220v holds the brake off. When no power is supplied to the brake it is on. So I assume it is an electromagnetic brake. The brakes for the 3 axis have 24v DC brakes.

[Noitoen]

Motor brakes are spring actuated and the electromagnet releases them. This is a fail safe so that the motor will brake when there is no power.

[Noitoen]

DC is used because you get a stable and silent magnetic field. AC will always vibrate at line frequency and that's why ac cores on relay coils have a little copper bar one turn short to reduce this vibration.

[skunkworks]

Lol - I guess I should have put a little smiley face on that...

RPM or seconds are pretty universal...

[Black Forest]

I damn sure knew you were kidding so don't worry about it.