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Home » Industrial » Vicor Introduces Ultra-High-Voltage Bus Converters

Vicor Introduces Ultra-High-Voltage Bus Converters

September 26, 2017 Vicor

Vicor today introduced a new fixed-ratio, ultra-high-voltage bus converter (UHV BCM) to its bus converter module (BCM) portfolio. The 700V K of 1/16 BCM offers a power level of 1.75 kW and a peak efficiency of 97%, with a power density of 700W/in³. The device is available in the thermally adept 4414 (111mm x 36mm x 9.3mm) VIA package, with either a chassis-mount or board-mount option and 4.3 kV of galvanic isolation. The VIA package also provides integrated PMBus™ communication, EMI filtering, and voltage transient protection. These modules can be paralleled into higher power arrays. In addition, the BCM outputs can be connected in series for higher output voltages.

BCMs are targeted for a broad range of applications such as tethered unmanned vehicles, power distribution systems, and 3-Phase front ends. BCMs can also be used as isolated unregulated front ends, which can then feed a multiplicity of ZVS PoL Buck and Buck-Boost regulators or PRMs and VTMs in a factorized power architecture.

The  higher voltage BCMs are available in either “T-Grade” (-40˚C to 100˚C) or “C-Grade” (-20˚C to 100˚C) temperature grades. A Mil-Grade rating (-55˚C to 100˚C) is scheduled for release by the end of 2017.

Providing DC-DC conversion after AC rectification and PFC, the 700V BCM provides a small, efficient, power component for power system designers to develop very compact 3-Phase systems with an SELV output. The 400V – 700V input capable device addresses nominal 380VRMS and 400VRMS input AC-DC conversion needs, commonly found in industrial applications.

The 1:16 transformation ratio and bidirectional operation also make the UHV BCM a well suited solution for remote unmanned vehicles used in air, sea, or underground exploration. Bidirectional operation enables systems to step up then step down line voltage to take advantage of reduced I2R losses, which improves power distribution cable size, weight, and costs, with significant system efficiency improvements. By using higher voltages for transmission, the tether cross sectional area and thus the weight can be reduced to allow for greater operating range of the UAV.



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