Coherent Power

Coherent Power has developed and patented technology which integrates modern power factor correction techniques with modern switchmode power supplies. In higher power applications, it can be integrated into existing products, or be used as an add-on. For multiple low power devices, such as the typical office full of computers, monitors, printers, s... canners, and copiers, etc., an add-on device which can operate from 20 to 60 computer systems has been designed and a demonstration unit constructed. This device can power all the office equipment and LED lighting in a typical small to medium office, requires no internal changes to existing equipment, and reduces the power otherwise consumed from the grid by at least 35% to 45% by operating at near unity power factor. This is much more cost effective than trying to integrate power factor correction into each individual computer or peripheral device. Output connection and distribution to computers with standard IEC cords and distribution strips simplifies retrofitting existing offices, and provides maximum versatility. As an additional benefit, this design can function as a superior UPS (Uninterruptable Power Supply), by being able to switch over to standard 48V battery systems as a backup source if the main power source is interrupted, without any change in output to the equipment, and waiting 10 seconds after return of main power to switch back. When operating from the main supply it provides the charging function to reach and maintain the proper float level for the battery system. Since DC is being supplied to the equipment at all times, at least 35% to 45% less energy (55% to 60% less for the LED lighting) is consumed from the batteries as well. In UPS systems for computers and their peripherals, the conventional method of inverting from batteries to AC (so that they then waste at least 35% to 45% due to their poor power factor) makes no sense whatsoever. By correcting power factor to unity when operating from the grid, and eliminating a needless inversion to AC ...Read More