Fanuc Motor Voltage Question

[Dave3891]

I am going to be driving some red top Fanuc motors and I have a question about the drive supply voltage.

The motor nameplate voltage section varies on all the motors I am using (48V - 127V) but the "PERM. MAG. FIELD" section on the nameplate all say 200V Inverter

Does this mean I can just use a 200V power supply for all the motors? Or will I need a separate voltage for each motor?


Attached it an example nameplate

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[Jim Dawson]

The max voltage is set in the inverter. You would run them with a 200 volt class inverter. The real question is: How do you plan on commutating them? Are you using the Fanuc inverters? I went through this a few months ago and gave up trying to untangle the commutation issues and just repowered the machine with DMM servos.

[Dave3891]

I have a test motor running already, I used a mesa card to talk to the serial encoder and it can retrieve the commutation data from that.
I am using a mesa 8i20 to drive the motor, but just with a 48V power supply until I can figure out what the correct voltage to use is.

So I am still not sure if I should just run 200V to the drives and then limit the current to the nameplate?

[Jim Dawson]

OK, you have the commutation figured out I couldn't use a Mesa card in my system.

What you propose might work.