HELP! Dual voltage AND dual speed
HELP! Dual voltage AND dual speed
(OP)
Hi I need to fill a strange application. Application is for a piece of mobile equipment that is capable of operating at any speed. It is currently running with a dual voltage single phase capacitor 115/230 motor running 1800 rpm synchronous induction motor approx 1.6HP continuous duty rated. Draws approx 15A at 115V, and 7.5A at 230V. We need to take full advantage of the 230V line when available. So what we want to do is get a dual voltage/dual speed motor that can be reconfigured on the fly (contactors). So desired result when running on 115V would be 1800rpm at 15A load, when running on 230V motor will run 3600rpm and produce the SAME torque as running at 115V, double power output (~3HP?). How do I go about this?
My first thought was exactly what I said, single phase induction motor with multiple windings and contactors, preferably no variable frequency drive. Second thought was a 3 phase motor with VFD, but without using 2 VFD's or step up/down transformer, not sure best way to handle dual voltage without making it really complicated.
Any help greatly appreciated.
Thanks
Brian
My first thought was exactly what I said, single phase induction motor with multiple windings and contactors, preferably no variable frequency drive. Second thought was a 3 phase motor with VFD, but without using 2 VFD's or step up/down transformer, not sure best way to handle dual voltage without making it really complicated.
Any help greatly appreciated.
Thanks
Brian





RE: HELP! Dual voltage AND dual speed
Or you could forgo that and just have a 120-240V transformer for the 120V input and have the selector switch put the 240V input direct to the VFD.
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RE: HELP! Dual voltage AND dual speed
RE: HELP! Dual voltage AND dual speed
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RE: HELP! Dual voltage AND dual speed
Is there some amperage limit on the supply? 15 amps at either voltage? Why is this? Could you get 30 amps at 115 volts? Are you trying to ensure that you can connect to any 120 volt receptacle anywhere and not trip a breaker?
RE: HELP! Dual voltage AND dual speed
RE: HELP! Dual voltage AND dual speed
There are many manufacturers and you need to ask for a double-voltage version. As an example you see:
ht
2 - It seems to me that such an motor, according to your requirements, can be made, but I doubt someone will try if it's just one motor.
Zlatkodo
RE: HELP! Dual voltage AND dual speed
RE: HELP! Dual voltage AND dual speed
RE: HELP! Dual voltage AND dual speed