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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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VFDs and line reactors questions
To all youse high speed spindle guys,
I have now a new 2.2KW VFD and matching 24000 RPM spindle motor. I am wondering how important line and load reactors are for this setup. Especially the line reactor because the motor/VFD combo is supposed to be matched and because the motor wires will be short, 6 feet or so. From looking online I have determined that a reactor rated at 12 amps, 2.5 mh, and 5% impedence is optimal. Can a reactor with a larger current rating be used? Also, since the VFD can be connected to single phase power and I want to use that option, I think I need to use a reactor with a higher current rating. 18 amps instead of 12, right? I haven't seen any single phase reactors yet on ebay which is why I am asking. On the output side I am concerned with noise making problems for the CNC mill (a Fadal 15XT) that the spindle will be installed in. Will a reactor help with this sitaution? Do I really need one with such a small (2.2 KW) motor? Thanks, Eric |
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