VFD and line reactor
I have a small VFD, Huanyang model HY02D223B that is powering a sub
spindle that I added to a CNC lathe. I have not interfaced the VFD with the CNC control and don't plan to. The manual says a line reactor should be used for power factor correction. It should be capable of handling 12 amps at 250 volts, have 2.5 mH inductance, and 5% impedence. Besides power factor correction does the line reactor do anything else that might prevent any problems? Such as stopping any noise that might interfere with and CNC machines that are wired into the same circuit breaker panel? I don't really care much about the power factor correction right now. My power company won't charge me less if the power factor is corrected, I just don't use that much juice. Virtually all the line reactors I see for sale are 3 phase models. I am powering the VFD with single phase but could use 3 phase. Do all lines running to the VFD need to go through a line reactor for proper operation? I could use 3 phase to power the VFD or maybe I could just use 2 of the three windings in a 3 phase reactor. I dont know if that would work so I am asking here. Thanks, Eric |
VFD and line reactor
|
VFD and line reactor
On Fri, 15 Mar 2019 10:09:03 -0700, etpm wrote:
Besides power factor correction does the line reactor do anything else that might prevent any problems? Such as stopping any noise that might interfere with and CNC machines that are wired into the same circuit breaker panel? Yes, I had a few pieces of computer-type gear that were affected by a VFD on my CNC mill. I put a heavy-duty commercial line filter box on it, and all the interference went away. This is an LC filter, not just a reactor. I found a suitable filter in my junk. Jon |
VFD and line reactor
On Fri, 15 Mar 2019 13:32:31 -0500, Jon Elson
wrote: On Fri, 15 Mar 2019 10:09:03 -0700, etpm wrote: Besides power factor correction does the line reactor do anything else that might prevent any problems? Such as stopping any noise that might interfere with and CNC machines that are wired into the same circuit breaker panel? Yes, I had a few pieces of computer-type gear that were affected by a VFD on my CNC mill. I put a heavy-duty commercial line filter box on it, and all the interference went away. This is an LC filter, not just a reactor. I found a suitable filter in my junk. Jon Thanks Jon. As it happens I have an LC filter I removed from an old CNC mill. Made by RK Electric. There is a schematic on the front that shows three 220 ohm resistors all connected together at one end in a star formation. The other end of each resistor is connected to a .47 mfd cap. From the other end of each cap is a wire. The device is rated at 600 volts. I don't know how to use it but I imagine it is just connected across the three incoming power wires. With single phase can just any two wires be used? Thanks again, Eric |
VFD and line reactor
|
VFD and line reactor
On Fri, 15 Mar 2019 13:32:31 -0500, Jon Elson
wrote: On Fri, 15 Mar 2019 10:09:03 -0700, etpm wrote: Besides power factor correction does the line reactor do anything else that might prevent any problems? Such as stopping any noise that might interfere with and CNC machines that are wired into the same circuit breaker panel? Yes, I had a few pieces of computer-type gear that were affected by a VFD on my CNC mill. I put a heavy-duty commercial line filter box on it, and all the interference went away. This is an LC filter, not just a reactor. I found a suitable filter in my junk. Jon Ditto here. It's difficult to see the filters, there are 6 Corcom line filters in this mess that isolate the servo driver boxes from the power line. Two filters are partially visible under the tangle of cables between the upper two boxes. There's also a power line filter going to the controller: http://www.learnbydestroying.com/jeffl/pics/CNC-conversion/slides/CNC-conversion-02-001.html Mo http://www.learnbydestroying.com/jeffl/pics/CNC-conversion/ I have no idea if they were really necessary because I insisted that they be included in the initial build and never tried to run any jobs without them. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
VFD and line reactor
|
All times are GMT +1. The time now is 04:11 AM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 DIYbanter