December, 2017
Bedford, NH — Powerbox has released a new range of high-voltage- input DC-DC (HVDC-DC) converters for data centers, microgrids and industrial applications. Part of its industrial line, the PRBX PQB-PHB-
www.us-tech.com
rapidly expanding. Data centers, microgrids and industrial systems that use HVDC bus voltages to reduce power losses require ready-to- use, board-mounted power convert- ers. They are built around a high effi- ciency topology, have a layout opti- mized for thermal conduction, an input/output isolation of 3,000 VAC minimum and deliver output volt- ages from 3.3 to 48 VDC.
Energy network managers and systems architects who are develop- ing electronic equipment connected to microgrids are concerned about energy efficiency and using direct conversion from the 350 VDC bus for specific applications. In many cases
PRBX PQB-PHB-PFB300S power supplies.
PFB300S series of HVDC-DC con- verters operates with an input volt- age range of 180 to 425 VDC, and outputs 150 to 750W of power. The range of applications pow- ered by high-voltage DC supplies is
ARC Develops Electrically Tuned
Polymers
Amesbury, MA — ARC Technologies has teamed with Composite Techs, LLC, to develop a new series of elec- trically tuned polymer formulations for the plastics and composites industries. These general formula- tions can be customized to meet the processing and performance specifi- cation requirements for extrusion, injection molding, thermoforming, and composite processes.
The materials include formula- tions with a wide variety of electrical properties and a focus on four gener- al areas: low dielectric, conductive, magnetic absorption, and electrical absorption. They have been tailored to be included in a variety of matrices for use in different functional envi- ronments and processes.
The low dielectric, low-loss ther- moplastic compounds exhibit good resistance to moisture and most chemicals. They are suitable for applications at 24 and 77 GHz, including radomes for automotive radar, and can be used as an imped- ance-matching material or as a dielectric spacer.
The highly conductive formula- tions provide excellent shielding over a wide frequency range. They are used for molding electronic covers and enclosures that benefit from low cost and design flexibility. The magnetic- absorbing formulations provide a bal- ance of mechanical and electrical properties and are excellent for sur- face current reduction, cavity mode suppression, and attenuating near- field emissions from 1 to 18 GHz. The electrical absorption com- pounds are designed for attenuation in the 10+ GHz range, and can be used for lossy enclosures and hous- ings to reduce/eliminate antenna pattern side lobes and improve per- formance. All of the materials are halogen-free and compliant with RoHS and REACH. Contact: ARC Technologies, 37 South Hunt Road, Amesbury, MA 01913 978-388-2993 fax: 978-388- 6866 E-mail:
sales@arc-tech.com Web:
www.arc-tech.com
the voltage conversion is achieved using single-stage, modular HVDC- DC converters that step down the bus voltage to the load.
The same is now happening in the latest generation of data centers, increasing energy utilization by the reduction of power losses by migrat- ing from AC distribution to HVDC. High-voltage DC distribution is also common in industrial electrical vehi- cles, such as those in the mining and tunnel industries. These require fully-encapsulated power modules that are able to operate within a wide temperature range, and down to –40°F (–40°C).
The series includes under-volt-
Page 77 Powerbox Releases DC-DC Converters for Data Centers
age, over-voltage protection and lock- out, continuous short circuit protec- tion, current limiting, and over-tem- perature protection. Both positive and negative remote on/off types are avail- able. The output voltage can be adjust- ed by the trim pin and all products come with voltage sensing and com- pensation pins. The power supplies meet the requirements of UL60950-1, EN60950-1, and IEC60950-1, as well as CE 2014/30/EU. Contact: Powerbox USA, Inc., 15 Constitution Drive, Suite 1A, Bedford, NH 03110 603-310-5200 fax: 603-310-5001
E-mail:
info.us@
prbx.com Web:
www.prbx.com
www.vitechnology.com
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