Hello group, As a clarification, I am fully aware of PFC using a boost converter on the input of a power supply with MicroLinear or Unitrode devices. I am also familiar with line reactors, delta-wye transformers, zig-zig transformers, resonant traps and so on.
All of these technologies will give you incremental improvements and usually some serious draw backs. The end result is that with enough hardware power factors may theoretically approach 0.96 or 0.98. Practical application does not often reach these levels unless in a very stable operating environment, like a computer supply that sees nearly the same load for its entire life. The products I have heard about are apparently different from PFC in that they actually operate in parallel with other equipment, not in-line as with a traditional PFC. Theoretically reaching 100% correction??? Rightly named or not, this has been called Active PFC or APFC. I am interested in learning more about any successful applications and how a system like this works. Especially if they are for 3 phase systems and power levels to 300 kVA. My hopes are for reduction of harmonic disturbances for equipment with inputs >16A (IEC 61000-3-6 ??). =================================== Doug Powell, Compliance Engineer Advanced Energy Industries, Inc. 1625 Sharp Point Drive m/s 2018 Fort Collins, Colorado 80525 USA Phone: 970-407-6410 eFax: 970-407-5410 email: [email protected] (new address) =================================== --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
