If you do use the ferrites in the outputs let us know how much heat they produce. I would guess it will be a function of the quality of the VFD's output stage, but have never tried power ferrites.
The filters used in theatrical dimmers can get pretty hot, and those frequencies are low compared to a VFD. Since ferrites are more lossy at high frequencies I'm curious about it. Thanks, Javid ----- Original Message ----- From: "Kirk Wallace" <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Sunday, October 28, 2007 6:24 PM Subject: Re: [Emc-users] Threading Hickups > Jon gets a gold star. I believe his is line filter suggestion solved my > noisy spindle encoder index problem. I got a couple of PREO filters: > > http://www.eastek-intl.com/images/PreoSeriesER.pdf > > One for the spindle VFD input (30 A) and another for the coolant VFD > input (20 A). I also got a few large ferrite beads, for the outputs, but > I am not sure how much they help. Thanks everyone for the help. I'll get > some pictures posted soon. I looks like these will be standard for all > my VFD's. > -- > Kirk Wallace (California, USA > http://www.wallacecompany.com/machine_shop/ > Hardinge HNC lathe > Bridgeport mill conversion pending > Zubal lathe conversion pending) > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
