In a message dated 98-11-30 12:58:20 EST, plaw...@west.net writes: << > Hello Colleagues, > I have recently learned of a technology whereby harmonic disturbances may be > reduced via APFC (Active Power Factor Correction). This is apparently a > device that injects cancellation harmonics back onto the line under closed > loop control. > > Is anyone able to point me to any resources where I can learn more? >>
Hi, active power factor correction has several guises. The two I'm familier with are where a pre-switcher is used, and where active circuits null harmonics at the point where power enters to box. For Technique 1, I suggest you go to the Linear Tech site, they have devices specifically for this, I believe Cherry do too. I'm playing with a LT 1509CN at the moment, it's quite good. For Technique 2, the work I did was to reduce the weight in aircraft solid state power convertors back in 1986. It was never made commercially available, though I believe a company from Israel called Actil has a filter based on this concept. They are at www.actil.com. Best regards. Derek Walton. Owner L F Research EMC Design and Test Facility. NARTE Engineer 438. --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
