The Saga that is my Conquest mini-lathe re-furb.

[Make Everything]

Steve,
Thanks, been doing a lot of that BUT it seems AC 3 phase is very well covered but DC 3 phase is non-existent except as you say for sub 50 volts.

Although I gather that treadmills run at 80 V but again i can find no new cct for those only cannibalize ones and most of the electronic /technical info is at best "patchy" and not really enough to start a controller from scratch.

I may have to buy a "toy" controller with the biggest ratings available and reverse engineer it with higher voltage/wattage (if those exist ) semi-conductors etc


The motor in question is :-MOTION CONTROL PRODUCTS LTD.
PART NUMBER:- M57BLR95-220-4200AL-1

220V 4200RPM

The company were VERY unhelpful except to tell me the motor was now obsolete and refused to furnish any tech spec/use/ control info except that it is 3 phase (and that was after I said i was puzzled by the fact that it had 3 wires instead of two for the usual DC motor. Which left me a bit puzzled as 3 phase AC usually has 4 wires if my creaking brain is remembering right.



as you see its' body is just about 4" /100mm long

may be as one of our members says that "all of us are smarter than just one of us " and someone here knows some thing about these beasties?


PS STEVE just banged up a copy & paste of your suggested phrase and i found some leads, My Google Fu it seems is not upto par of late Thank You.

Y-Geo，

the motor is a 57mm 3 phase Brushless Motor，If there are only three lines, he is not a Hall element version.the
the M57BLR95-220-4200AL-1 Is the old number，According to the new naming rules, it is 57BS95R-##-2242-T-S,the##is watt
sorry I did not find the data for this model, I think it is custom product for mini lathe，
If his label is correct, you can use the No Hall 310v300-500w Universal Brushless Motor Controller, but there is a high risk. At the same time the cost will increase。your chinese speed controller is a Brush motor controller ，can not be used with this motor！
My advice is to temporarily give up this motor, with a conventional DC motor.
good luck(I am very poor in English, the above content from Google translation, may not be accurate)