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#33284 - 06/21/22 10:08 PM Single phase traction machine  
Joined: Mar 2017
Posts: 49
ashley Offline
newbie
ashley  Offline
newbie

Joined: Mar 2017
Posts: 49
Has anyone ever ran across a single phase MRL traction machine for a 1500# car? Torin and Hollister only make 3 phase.

#33287 - 06/22/22 12:37 AM Re: Single phase traction machine [Re: ashley]  
Joined: Dec 2015
Posts: 1,318
Indirtwetrust Offline
ElevatorPractitioner
Indirtwetrust  Offline
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,318
Local 18
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.

#33288 - 06/22/22 12:37 AM Re: Single phase traction machine [Re: ashley]  
Joined: Aug 2017
Posts: 139
EElevator Offline
member
EElevator  Offline
member

Joined: Aug 2017
Posts: 139
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.

#33423 - 07/18/22 02:48 AM Re: Single phase traction machine [Re: ashley]  
Joined: Aug 2019
Posts: 3
Up&Downer Offline
stranger
Up&Downer  Offline
stranger

Joined: Aug 2019
Posts: 3
I just got a 1965 Dover/Turnbull geared unit running on 208 single phase. But has a MR.


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