2postlifthelp
Plastic
- Joined
- Jul 15, 2019
Hi, i'm new to this forum but i've read a lot of threads on here and some of the replies are from really clued up people so I would like to ask for some help.
I have brought a 3 phase 3 tonne 2 post car lift and would like to know the best way to go about powering it from a single phase input. I have been thinking of a few ways but my knowledge is limited. I have a motor on each lift and the motors are stamped with plates with the following details:
50hz - delta/star 230v/400v - 3kw - 14.3/8.3a
60hz - delta/star 275v/480v - 3.6kw - 14/8.1a
1370/1670 rpm
So i wanted to know what is the best way to power these 2 motors and from reading i see there are a few pro's/con's and some people having issues with the various methods. The 3 methods below are what I have thought about can someone shed any light on the best route:
1) A 7.5kw 1 phase in/3 phase out VFD and rewire both the motors to delta and send out 230v 3 phase from the VFD - the only issue is my lift system has a control unit and I have read this can cause issues with the VFD can this be negated by setting up the VFD properly to have a constant voltage out from the VFD or is this an issue?
2) If the above control unit is an issue can I wire up both of the motors direct to the VFD and then use a forward/reverse switch wired into the VFD? At 50hz and 3kw x2 would the 7.5kw VFD be able to support this?
3) I have seen a diesel generator it is a Powertech PT6500w with a 3 phase 6500w output however the manual says it has 6500w split equally over the 3 phase and 1 phase outputs. It also only goes up to 380v is this a big issue? Also would i be able to draw 6000w from the 3 phase output alone?
4) Will a static converter like the clarke pc-60 be able to generate enough power to run the motors. It is rated at 5.5hp
I am honestly lost on what the best way to go about this is and I have read stories of people buying a VFD and then the motors or VFD tripping out when trying to lift under load. It is a 3 tonne rated post system and I would be lifting about 2.5 tonnes so near max capacity.
Any help is greatly appreciated. I want to avoid having to buy new motors for it if possible and I want to learn more about using VFD's for 3 phase power.
I have brought a 3 phase 3 tonne 2 post car lift and would like to know the best way to go about powering it from a single phase input. I have been thinking of a few ways but my knowledge is limited. I have a motor on each lift and the motors are stamped with plates with the following details:
50hz - delta/star 230v/400v - 3kw - 14.3/8.3a
60hz - delta/star 275v/480v - 3.6kw - 14/8.1a
1370/1670 rpm
So i wanted to know what is the best way to power these 2 motors and from reading i see there are a few pro's/con's and some people having issues with the various methods. The 3 methods below are what I have thought about can someone shed any light on the best route:
1) A 7.5kw 1 phase in/3 phase out VFD and rewire both the motors to delta and send out 230v 3 phase from the VFD - the only issue is my lift system has a control unit and I have read this can cause issues with the VFD can this be negated by setting up the VFD properly to have a constant voltage out from the VFD or is this an issue?
2) If the above control unit is an issue can I wire up both of the motors direct to the VFD and then use a forward/reverse switch wired into the VFD? At 50hz and 3kw x2 would the 7.5kw VFD be able to support this?
3) I have seen a diesel generator it is a Powertech PT6500w with a 3 phase 6500w output however the manual says it has 6500w split equally over the 3 phase and 1 phase outputs. It also only goes up to 380v is this a big issue? Also would i be able to draw 6000w from the 3 phase output alone?
4) Will a static converter like the clarke pc-60 be able to generate enough power to run the motors. It is rated at 5.5hp
I am honestly lost on what the best way to go about this is and I have read stories of people buying a VFD and then the motors or VFD tripping out when trying to lift under load. It is a 3 tonne rated post system and I would be lifting about 2.5 tonnes so near max capacity.
Any help is greatly appreciated. I want to avoid having to buy new motors for it if possible and I want to learn more about using VFD's for 3 phase power.