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Got My First Machine!
- Thread starter Izzy
- Start date
Lol that video XD they did another one of those videos but with a transmission, kills me everytime XD.
If I went with an rpc instead of a VFD would I still need to re configure the control voltage?
If it ran on 460 3phase before why would I need to change things if it still has the original voltage? Just trying to understand how this all works
If I went with an rpc instead of a VFD would I still need to re configure the control voltage?
If it ran on 460 3phase before why would I need to change things if it still has the original voltage? Just trying to understand how this all works
- Joined
- Feb 2, 2013
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if it ran before on 460 volts 3 phase and you hooked it up to 460v 3 phase again, logic would tell you that it should run exactly as it is.
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- Feb 8, 2014
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The RPC/transformer would work fine. An RPC outputs 3 phase but has no other control functionality.
Or so would the VFD. The VFD outputs 3 phase also and is a variable frequency motor controller which is kinda handy.
I would take your motor over to the motor shop and see what it would take for them to get it to run on 230V. I really don't think it needs a rewind to do that. And I'm pretty sure they can get that pulley off also.
Or so would the VFD. The VFD outputs 3 phase also and is a variable frequency motor controller which is kinda handy.
I would take your motor over to the motor shop and see what it would take for them to get it to run on 230V. I really don't think it needs a rewind to do that. And I'm pretty sure they can get that pulley off also.
I haven't had time to mess around with the motor but I should be able to get it off.
Going back to what Ted said about the vfd only powering the spindle motor why is that? Like wouldnt I just run the 3 phase wires out of the vfd to L1, L2, and L3 at the top of these fuses and be good to go? Doesn't the machine have a step down transformer that converts from 460vac-120vdc? I feel like I'm missing something and that's why I'm.not getting it :/
Going back to what Ted said about the vfd only powering the spindle motor why is that? Like wouldnt I just run the 3 phase wires out of the vfd to L1, L2, and L3 at the top of these fuses and be good to go? Doesn't the machine have a step down transformer that converts from 460vac-120vdc? I feel like I'm missing something and that's why I'm.not getting it :/
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- Feb 8, 2014
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The reason is that the VFD output must be connected directly to the motor. No fuses, overloads, switches, etc. The VFD takes care of all of the safety stuff and switching. The VFD is not a 3 phase power source like a RPC, it is a 3 phase motor controller. It will convert single phase to 3 phase, but can only work correctly when connected to a motor, or maybe to the motor through a 3 phase transformer.
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- Joined
- Apr 4, 2016
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What Jim said plus, VFD's provide "variable" voltage and frequency. You don't want anything other than the proper "constant" voltage and frequency going to those electronic components as well as things like the coils on the mag starters, relays, etc.
Ted
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- Apr 4, 2016
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Zactly !!
Ok ok I think I understand, so since the vfd doesn't put out a consistent voltage and frequency it would mess with the rest of the electrical components as they need one constant voltage to work correct? So that means that I could just run 3 phase power from a rpc to those fuses in that picture then I wouldn't have to touch anything correct?