steve@cs.UAlberta.CA (Steve Sutphen) (12/03/90)
Is there a standard for electric motor connections? I have a 1HP syncronous A/C motor (GE 5KC47PG1207EX) that I retrieved from an old disk drive. I would like to turn this into the drive motor for my table saw, but I do not have any wiring diagrams for it (it does say that it requires 187-253V at 9.0A). The problem is that the way it was hooked up used more than 3 wires (it is a single phase motor so I would expect 2 current carrying wires and a safety ground). There are 5 wires (plus safety ground) comming into the motor. I traced out where all the wires went, but that didn't help much as 3 went to the field windings, one went directly to the motor start capacitors (two in series). Here is a schematic of what I have reverse engineered so far. 4-------------------------------------- to field winding `A' V--------||---||-------->| | | 2_________________H______|------------- to field winding `A' 3-------------------------------------- to field winding `B' 1-------------------------------------- to field winding `B' The numbers are the Faston terminal numbers, the `V' is a violet wire that goes to the motor start caps, the `->|' is the contact that opens when the motor is up to speed, and the `H' is the thermal protection. There is a sticker on the motor indicating that it is wired for CW and low voltage. What I would like to do is figure out how to wire this up for 220 (or is it 208V). I may need to change the rotation direction too (actually I have another motor that runs off of 110V that I would like to change the direction on if anyone knows how). Any help would be appreciated. steve@cs.ualberta.ca
grege@gold.gvg.tek.com (Greg Ebert) (12/04/90)
In article <1990Dec2.220920.14435@cs.UAlberta.CA> steve@cs.UAlberta.CA (Steve Sutphen) writes: > [...] > >4-------------------------------------- to field winding `A' > >V--------||---||-------->| > | > | >2_________________H______|------------- to field winding `A' > >3-------------------------------------- to field winding `B' > >1-------------------------------------- to field winding `B' > I havn't worked with the exact motor you have, but I've tinkered with a similar one. Hope this helps. These guys look like a (from a circuit-sense) as : AC line -----------*------ switch --| |----- | | Stator Start Coil Coil | | | | AC line -----------*------------------------- The switch is closed when the RPM is low (~75% rated speed). The direction of rotation is determined at power-on. If you disconnect the starter winding, you can manually start a motor in either direction. Better yet, just switch the 'polarity' of the stator winding with respect to the start winding to reverse the direction. To get your motor to run: Connect terminal 2 to AC line. Connect terminal V to terminal 1 Connect terminal 4 to AC neutral Connect terminal 1 to AC neutral To reverse direction, interchange 1 and 3.