A voltage programming input is provided where 0 to +4.64Vdc equals 0 to 100% of rated voltage.
#HIGH VOLTAGE DC DC CONVERTER FULL#
The Spellman UM Series interface provides current programming capability and positive polarity, buffered, low output impedance voltage and current monitor signals (zero to +4.64Vdc equals zero to full scale rated). Standard units limit at 103% of maximum rated output current. These two accurate ground referenced feedback signals are used to precisely regulate and control the units in addition to external monitoring purposes.ĭue to the UM’s unique converter topology it can provide full current into low impedance loads or even a short circuit. A current feedback signal is created via a current sense resistor in the low end return of the high voltage output circuitry. The actual output voltage generated is sampled via a high impedance divider to create a voltage feedback signal. Through the use of generously rated surge limiting resistors and a fast acting current loop, all units are fully arc and short circuit protected. Units at 1kV or higher utilize an arrangement of half wave Cockcroft-Walton voltage multiplier stages to obtain the specified high voltage output, while lower voltage units use a robust rectification and filter circuit.ĭue to the fixed, high frequency conversion rate the output capacitance is small resulting in minimal stored energy. The high voltage output is generated using a ferrite core high voltage step up transformer which feeds the output circuitry.
Radiated emissions are reduced compared to conventional switching topologies, minimizing or even eliminating the need to shield the unit from adjacent circuitry. UM converters use a proprietary zero voltage switching power conversion topology providing exceptional efficiency and inherent low noise and ripple. Utilizing proprietary power conversion technology and Spellman's six decades of high voltage experience, these SMT based high voltage modules provide improved performance/reliability and easier system integration at a lower cost when compared to the competition. Spellman’s UM Series of printed circuit board mountable, high voltage modules offer a form, fit and function replacement for presently available commercially made units, while providing additional features and benefits at competitive pricing.
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