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High voltage & high power servo drive design
Since our upcoming servo drive VSD-E will be 12-80 VDC drive and there is a clear market for high voltage drive that can be operated directly from mains voltages (115/230VAC), I'm creating this poll to gather user opinions about preferred servo drive constructions.
I have 3 different drive types in mind that would allow such operation:
- VSD-E without on-board power stage. It would just have connector for external power stage.
- Small sized control card with pin headers. This could be plugged on "mother board" containing the power stage.
- Monolithic design. Everything on one board and possibly a metal enclosure for it.
Options 1-2 allows controlling virtually any power and option 3 would be the easiest to use.
Attached picture shows VSD-E drive if one isn't already familiar with it. Option 1 would look much like, but 1/2 of this size.
to Xerxes - Thanks for the advice for ServoDisk motors
I invested in 3 FC15030 30A filters from Advanced Motion Controls which can handle 400V and adds 300 microhenries.
I've built a PWM motor tester using a couple of medium sized lead acid batteries, and run the pot up and down. The motors are strong - gripping the shaft harder and harder by hand doesn't seem to slow them down much at all.
I did have a frown during testing - The smaller normal DC brushed motors could be slowed and well controlled at slower speeds. The ServoMotors didn't ever come to a complete stop, so I figured my low power waveform was still plenty of energy for them.
I appreciated your comments.
I took a look at your thread, the products are awesome and priced well.
I wish there was an interactive DC servo motor calculator where I could put it what I know, and get out accelerations, and running speeds.
Last question - anyone know where to find the amount of energy needed for the cut (for steel, aluminum, brass, polyurethane). I figure the axis move is proceeding along a a minimal power budget until it encounters the object to be milled. Then the amps go up, depending in size of cutter, depth of cut, speed of motion, etc. Are there any guestimates for torque needed for certain cutting depths, assuming standardized cutter sizes?
Thanks everyone for your posts. I'm reading everything I can find here.
Aloha
Bill