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22/06/2022 6:08 am
Has anyone ever ran across a single phase MRL traction machine for a 1500# car? Torin and Hollister only make 3 phase.
22/06/2022 8:37 am
I kind of doubt that exists. And you’d have just as much trouble finding an elevator drive to run a single phase motor. But if single phase power is the issue you should be able to find a drive that will run a 3 phase motor with single phase power. The incoming power is just charging a DC bus, the drive creates the 3 phase for the motor.
22/06/2022 8:37 am
I'm not sure what advantage you'd get. If the building has single phase power a vvvf drive will output three phase power anyhow, enabling you to use a 3 phase motor. Are you trying to use contactors (single or two speed motor)? I haven't seen anyone use a single phase motor for any traction or winding drums in anything recent. It's much simpler to use a three phase motor with a vvvf drive.
18/07/2022 10:48 am
I just got a 1965 Dover/Turnbull geared unit running on 208 single phase. But has a MR.