The reason is on the attached picture....
I need small motor with some short term grunt. Hate all types of air motors in my garage, if I can avoid them.
Need a small spotting drill motor, 90W would do, marginally, but everything else should be spot on.
These motors are not exactly similar in usable continuous power rating, but I have these at hand.
1) AC motor 0,25kW 220V 1,5A 1400rpm 6kg B3
2) PM DC-motor, Proxon BFW 40/E 250W/10min 40VDC 900-6000rpm 4,2kg
3) AC servo motor, 200W 92V 1,6A rated freq. 200Hz, rated speed 3000rpm, 0,91kg
Good old AC motor would do the work with all propability beyond WW3 and beyond but is a bit of BEHEMOTH . Would need some wrestling to set and is too big.
Brushed PM DC motor would be closer to size and bit smaller. Limited brush life and limited duty cycle probably would never come to haunt me. It's still not very elegant to fit one motor with a collet to a spindle with a belt drive.
This Panasonic AC servo is smaller and with less than kilo it would make a perfect canditate. I know that for that output this servo should have it's own drive and attached a big lump of metal, but even with encoder this screams "take me to the QCTP"
I did some reading of my old inverter manual and I think I should have a good chance to get it working with some fudge factors. I'm mainly toying with the idea of faking V/F to 400Hz/full, and to limit max F to 200 Hz to produce closer to 92V at 200 Hz RMS, Also probably will have to toy with "boost" to give enough voltage and limit the current conservatively.
Pekka