Roberts Warr Electronics News & Resources

Today, February 26, 2007 - The Green Grid consortium announced the completion of its formation, membership structure, technical charter, and made available three white papers.

The consortium also announced its Board of Directors, comprised of AMD, APC, Dell, HP, IBM, Intel, Microsoft, Rackable Systems, SprayCool, Sun Microsystems, and VMware.

Who seems to be missing at this time from the Green Grid consortium:

- Google, who presented a white paper in September 2006, “High-efficiency power supplies for home computers and servers”.
- Power supplies manufacturers, such as Delta, Astec/Artesyn, Lite On, etc. should be also interested in joining the efforts to reduce energy losses.
- 80PLUS organization that did a very good job in promoting highly efficient power supplies.

West Coast Magnetics is pleased announce a new inductor technology which achieves a major improvement in cost and efficiency over existing inductor technology. This new technology combines the low DC resistance of a foil wound inductor with the low AC resistance of a litz wire wound inductor. For high current, high ripple applications at frequencies of 10 kHz and up loss reductions in the range of 25% to 50% compared to conventional wire wound devices are typical. The technology fits very well with the newer classes of silicon devices such as IGBTs designed to operate at current levels of 100 amps and up and at frequencies over 10 Khz.

Sunnyvale, California - February 20, 2007 - Magic Power Technology Inc. introduced the new 400-watt MPM-842P medical grade certified AC-DC power supply. The MPM-842P is an idea power source for a wide variety of medical equipment devices that demand higher operating power.

The MPM-842P is compliant with UL 60601-1 and IEC 60601-1, meets EMI IEC 60601-1-2 Class B, operates over a wide 90 to 264VAC input range, and provide short-circuit, over voltage and thermal protection. This MPM-842P not only has high current on its 12V rail, which is an excellent choice for today’s medical applications with the demand of high operating power but also offers competitive densities without performance deratings from 0 to 50°C.

Easton, PA - February 15, 2007 - Acopian modular linear power systems eliminate the hassle associated with combining power supply outputs for redundancy; all you need to do is plug in the two umbilical cables and connect AC input power and the load. Input switches and fuses, ‘output present’ indicators, isolation diodes and failure alarm circuits are included in the system integration module. It and the two power supplies (which are hot-swappable) may be easily mounted to a DIN rail, wall, chassis or cabinet frame.

Input voltage ranges from 105-125 VAC, 50-40 Hz, single phase. Output ratings from 5 to 125 Vdc, to 425 watts. Other redundant output systems are available in rack-and wall-mounting configurations.

February 13, 2007 - Ashland, MA - Schaefer, Inc’s line of pure sine wave inverter products now boast the only 2KVA product in the market that is packaged in a slim, 1U rackmount design. Highly efficient and reliable, the pure sine wave output of the AEP-A2000R Series offers benefits over modified or quasi-sine wave units by delivering “clean” output power for powering sensitive loads and for improving AC equipment performance.

The AEP-A2000R Series is available in three standard input configurations of 12VDC, 24VDC and 48VDC. Outputs are available in 115 or 230VAC (50/60Hz) versions, which are regulated to +/-3% or better. A built-in, 4-6ms automatic bypass switch allows for redundant operation from utility power if the DC supply drops out.