Using a 230V VFD with 120V


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    Default Using a 230V VFD with 120V

    I recently got an X3 mill for cheap because the spindle motor is not working. I am doing a CNC conversion and I think I will replace both the spindle motor and controller board with something I can control from my motion controller board.

    I have a big pile of parts in the garage, and one of them looks to be a pretty nice VFD. It is a Siemens Micromaster Vector 6SE3215-2CB40. I am including an image of the specs printed on the VFD.

    It is rated for 1.5HP/1100W output, which seems like a useful range for the X3 mill spindle motor, but it is rated for a 230V input, and the house I am renting only has 120V available in the garage. I don't think I have the option of changing the garage wiring, so I am wondering if I can make this VFD work.

    Three options:

    1. Use a 120-240V transformer (it will have to be very big...) to supply the VFD

    2. Try running the VFD with an input voltage of 120v

    3. Sell the VFD and buy one designed for a 120V input.

    I don't have a lot of experience with VFD's, so I am not sure if #2 is even an option. I also don't know for sure that this VFD even works (I think it was removed from working equipment, but it has been sitting for 3-4 years), so I will also need to learn how to get it setup.

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    Default Re: Using a 230V VFD with 120V

    you can wire a 1KW 120v:120v isolation transformer as a voltage doubler, it will be good for 2KW worth of 240vac which will be enough for your vfd and spindle.

    another option is buying a diode block and some 200 volt electrolytic capacitors to build a voltage doubler (4000 uF worth perhaps, two of them), feed that voltage into your vfd.



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    Default Re: Using a 230V VFD with 120V

    Quote Originally Posted by ravix View Post
    I recently got an X3 mill for cheap because the spindle motor is not working. I am doing a CNC conversion and I think I will replace both the spindle motor and controller board with something I can control from my motion controller board.

    I have a big pile of parts in the garage, and one of them looks to be a pretty nice VFD. It is a Siemens Micromaster Vector 6SE3215-2CB40. I am including an image of the specs printed on the VFD.

    It is rated for 1.5HP/1100W output, which seems like a useful range for the X3 mill spindle motor, but it is rated for a 230V input, and the house I am renting only has 120V available in the garage. I don't think I have the option of changing the garage wiring, so I am wondering if I can make this VFD work.

    Three options:

    1. Use a 120-240V transformer (it will have to be very big...) to supply the VFD

    2. Try running the VFD with an input voltage of 120v

    3. Sell the VFD and buy one designed for a 120V input.

    I don't have a lot of experience with VFD's, so I am not sure if #2 is even an option. I also don't know for sure that this VFD even works (I think it was removed from working equipment, but it has been sitting for 3-4 years), so I will also need to learn how to get it setup.
    Of your choices the Transformer is your best why to go as many have done, something like this is all you need, you could run your whole machine from this one source, having a 120v and 240v output

    https://www.amazon.com/2000-Voltage-...ansformer+2000

    Mactec54


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    Quote Originally Posted by mactec54 View Post
    Of your choices the Transformer is your best why to go as many have done, something like this is all you need, you could run your whole machine from this one source, having a 120v and 240v output

    https://www.amazon.com/2000-Voltage-...ansformer+2000
    Thanks! I bought that exact transformer and will try using it.



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Using a 230V VFD with 120V

Using a 230V VFD with 120V