RDay
Member
I am helping out a friend that recently purchased a piece of old wood working equipment. I was told that the motors on this piece of equipment were connected to a Frequency Converted that provided speed selection. Well, I had envisioned an old VFD. Once I went to look at the system I found that the frequency converter was what appeared to be 2 motors coupled together shaft to shaft. Both motors are 3 Phase AC motors. One is 30 HP and the other is 15 HP. Both motors are wired to a set of contactors that switch between the two and then to another contactor that switches to a knife box labeled LOW OFF HIGH. An output from this box appears to feed four motors of various HPs on the machine. Has any one seen this kind of set up before? If so, how does it work? Any help would be grately appeciated.
Thanks,
Thanks,