Emerson AC servo driving

[triag]

I bought nice AC servo motor Emerson MGW-208-CONS-0000. I plan to put it to my Taig mill as spindle motor. I bought it because it was cheap ($60 used) and it has nice specs for Taig.

Rating: Intermittent, 3 Ph, S9 Class F
240 VAC, 2.6 A, 0.46 kW 5000 rpm and 3/8 shaft. Almost perfect for Taig spindle motor replacement.

Just that how to drive it, no Emerson driver was available in that shop and it can be difficult to find in Thailand. Can somebody suggest how to drive this motor example without encoder and with some other brand AC Servo driver. Yaskawa, Mitsubishi and Panasonic are atleast easily available.

Also can it be drive with 1-phase in 3 phase out VFD. I understand output voltage is 400 V in those.

[Al_The_Man]

Does it have any kind of commutation feedback as far as you can tell?
This is the deciding factor as to how you can drive it.
VFD's do not work well with P.M. motors.
Al.

[triag]

It looks like this http://www.lektronix.net/images/equi...n_DXE-316C.jpg
but both two connectors are at the end part (encoder I think) of that servo motor. And it is actually MGE-208-CONS-0000, not MGW-..

As said, I don't really need the encoder function if it can be driven without easier.

[Al_The_Man]

If you can find out the encoder specs and pin out, you may be able to use an Advance Motion BLDC drive on it if it has the 3 simulated hall commutation outputs.
Al.

[triag]

Thank you.

It is maybe easier to find Emerson EN series driver and cables than studying all that.

I thin it can be also drive with sensorless BLDC driver as well, I will not have possibility to try that.

[triag]

I found this kind of statement in Glentek Omega series webpage.

However, in some cost sensitive applications where slight motor movement is acceptable upon power up, the amplifier can perform a power-on phase finding algorithm which eliminates the need for Hall sensors or Commutation tracks.

Now the interesting question is can Yaskawa or Mitsubishi drivers provide this kind of functionality as well. I would like to use those readily available servo drivers to run my motor in open loop mode, basically as brushless motor.

I can see that Servopack or Mitsubishi MR-J2-A drivers manual does not mention them having U,V,W commutation inputs at all.

[mike_Kilroy]

i think the answer is no; i have never seen wake and shake routines for them. u dont see hall input terminals for them as they generally use proprietary serial absolute encoders that dont need halls. glentek obviously has w&s routines as does our Kollmorgen drives. but this does NOT mean you dont need feedback still! sensorless drive is different than hall-less but still needs encoder drives. i doubt u will make a sensorless drive work anywhere near well enough for a machine tool. sensorless is starting to be used on PM brushless motors in washing machines and such since they do not need to go below a few hundred rpm and do NO positioning. the day may come 15 years from now but the technology is not there today for no feedback on a positioning servo slide drive motor- ok, in my opinion.

i think ur idea of googling and studying the EN motor drive specs is really good - will tell u what the internal feedback device is and that will tell what other brand drives u might use.