It's a drum chipper. The drum has the inertia. Jamming a log in it takes 5 seconds "inertia" to stop. The motor is IEC and likely N design. They prefer off the shelve motors.
I agree a VFD start then DOL on both would be optimal. But it's not a design which they have maintenance experience (the...
Application is wood chipper. Lots of load swings. But nothing special.
The whys for VFD:
Motors are identical, but if one fails or needs maintenance, they will replace with whatever is in the shelf.
The chipper may have a heavy or jammed start every now and then. They will not care how many...
Two 300kW motors on same shaft. One with soft-stater. Another with VFD. The intention is to start #1 with VFD and then #2 with soft-starter.
Questions:
Are there any issues flying start a soft-starter? It can ramp voltage and/or current.
Load share will be done by limiting current or torque on...
