Munich, Germany EPCOS has developed the MKK440-D-56-01 type in the PhaseCap® HD series of capacitors for power factor correction. The type is rated at 56 kvar for a supply voltage of 440 V at 50 Hz and makes it possible to implement a 50 kvar stage with just one capacitor. Up till now, two 28 kvar capacitors were needed to obtain a 50 kvar stage in a PFC system with a detuning level of 7% in a 400 V grid. The new power capacitors from EPCOS are used not only for power factor correction, but also to reduce distortion and harmonics in the grid, thus improving and stabilizing power quality. Special customer benefits include a lower space requirement in switching cabinets and simplified logistics. Installation time and costs are also cut. The capacitor is rated at 3 x 307 µF for a rated current of 74 A. Like all PFC capacitors from EPCOS, this new product is self-healing and PCB-free. The mean life expectancy is 115 000 hours at 5000 switching operations per year. EPCOS , Munich, Germany. www.epcos.com.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.