Spellman High Voltage Electronics GmbH of Bochum at MEDICA 2018 in Düsseldorf -- MEDICA - World Forum for Medicine

Spellman High Voltage Electronics GmbH

Josef-Baumann-Str. 23, 44805 Bochum
Telephone +49 234 87906-0
Fax +49 234 87906-11

Hall map

MEDICA 2018 hall map (Hall 10): stand A71

Fairground map

MEDICA 2018 fairground map: Hall 10

Our range of products

Product categories

  • 01  Electromedical Equipment / Medical Technology
  • 01.02  Imaging supplies
  • 01.02.03  X-ray devices and accessories

X-ray devices and accessories

Our products

Product category: X-ray devices and accessories



Form, Fit and Function Design:
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. 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.

Advanced Power Conversion Topology:
UM converters use a proprietary zero voltage switching power conversion topology providing exceptional efficiency and inherent low noise and ripple. Radiated emissions are reduced compared to conventional switching topologies, minimizing or even eliminating the need to shield the unit from adjacent circuitry.

The high voltage output is generated using a ferrite core high voltage step up transformer which feeds the output circuitry. 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.

Due to the fixed, high frequency conversion rate the output capacitance is small resulting in minimal stored energy. Through the use of generously rated surge limiting resistors and a fast acting current loop, all units are fully arc and short circuit protected.

Control and Regulation:
The actual output voltage generated is sampled via a high impedance divider to create a voltage feedback signal. A current feedback signal is created via a current sense resistor in the low end return of the high voltage output circuitry. These two accurate ground referenced feedback signals are used to precisely regulate and control the units in addition to external monitoring purposes.

Due to the UM’s unique converter topology it can provide full current into low impedance loads or even a short circuit. Standard units limit at 103% of maximum rated output current.

Standard Interface:

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). A voltage programming input is provided where 0 to +4.64Vdc equals 0 to 100% of rated voltage. Current programmability allows the user to set where the unit will current limit, anywhere from 0 to 100% of maximum rated current. This feature is beneficial where less than full output current is desired, like in the case of protecting a sensitive load.

The buffered low impedance voltage and current monitor signals can drive external circuitry directly, while minimizing loading and pickup effects. These features save the user the expense and implementation of external interface buffering circuitry while improving overall signal integrity. This standard interface is made available via a row of 13 pins with 0.1. pin spacing. A legacy interface (7 pins on a 0.2. spacing) that is compatible with presently available commercially made units can be provided by ordering the “L” option.

Mechanical and Environmental Considerations:
The UM Series are solid encapsulated, printed circuit board mountable, plastic cased converters measuring only 2.97. X 1.5. X 0.83. (75.4mm X 38.1mm X 21.1mm). All units are encapsulated using a silicon based potting material which is considerably lighter in weight than epoxy. Two isolated, non grounded 2-56 machine screws thread into the module to securely mount it to the printed circuit board, relieving any stress on the interface pins. Mounting plates, brackets and flanged mounting options are also available.

Regulatory Approvals:
Compliant to 2004/108/EC, the EMC Directive and Compliant to EEC EMC Directive. Compliant to EEC Low Voltage Directive. UL/CUL recognized, File E227588. RoHS Compliant.

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Product category: X-ray devices and accessories


The XMPG is a modular 10kV @ 10W X-Ray generator designed to drive a grounded filament X-Ray tube via closed loop filamentary control of the 0 to 1mA emission current. The grounded filament supply is rated at 0-5 amps @ 3Vdc. The filament supply features an internally adjustable 0.5 to 2.5 amp filament preheat and a internally adjustable 0 to 5 amp filament limit.

The high voltage program and emission current program have internal preset capability simplify interfacing to this X-Ray generator. Or a customer provided 0 to 10Vdc signal can be used to remotely control these two signals. A high voltage monitor signal and emission current monitor signal is provided. A High Voltage Enable input provides control of the high voltage output and a Filament Stable output indicates the filament current is stable and the X-Ray tube is producing X-Rays.

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About us

Company details


Who We Are
Spellman, a family owned and managed company established in 1947, is the world's leading independent supplier of precision DC high voltage power supplies, X-Ray generators and Monoblock® X-Ray sources for medical, industrial and scientific applications. While we offer the broadest and most advanced range of standard and platform products in the industry, we specialize in partnering with OEM’s to develop, produce and support the optimum solution for each system and market segment.  We currently have five design centers, six production centers, eight repair locations and over 1600 employees in North America, Europe and Asia.

Our Mission
Spellman advances medical care, industrial processes, quality control, scientific research, security and telecommunications by providing innovative high voltage power conversion solutions that enable equipment manufacturers to achieve their systems’ performance, reliability, and cost goals.

Our guiding principle is to Understand and Provide What Each Customer Values.  We start by working closely with our customer’s design teams to develop the right solution for each system and market requirement, and we continue by providing world-class production flexibility, quality and service throughout product life-cycles.

To help our customers succeed, we continuously improve three core capabilities that, together, provide unique advantages to our OEM partners.

High Voltage Expertise
Spellman's design teams in North America, Europe and Asia form the world’s largest, and most experienced group of technical specialists dedicated to the development and production of advanced HV power conversion products.  Driven by customer requirements for precision power used in a broad range of high-tech applications, our engineers constantly push performance and reliability limits while optimizing cost and size.  We also partner with select critical technology providers to develop proprietary HV materials and components that enable us to achieve these goals.

Global Presence
Becoming a best in class partner to our customers is not a “once and done” project at Spellman.  We are continuously evaluating, optimizing and upgrading our world class production centers to maximize flexibility and process control and drive out cost.

In addition to investing in global resources such as low-cost manufacturing centers, and in providing the skills, resilience and competitive costs our customers need, we are also dedicated to providing superior local support. With best in class manufacturing facilities and service centers located strategically around the world, Spellman stands ready to support your needs when and where you need it.

Build for Tomorrow
Spellman is about the future. By investing now to develop our people, plants, processes and technology, we ensure that we can support your needs today, and will be ready to help you succeed for years to come. Our goal is long-term, responsible and sustainable growth.  Thus, we strive to operate in an environmentally and socially responsible manner, and are proud of being one of the first companies in our field to receive ISO14001 certification.

Our Commitment: To Understand and Provide What Each Customer Values. 
We invite you to explore the many advantages of partnering with Spellman. We look forward to working with you to provide the high voltage technology that your next generation systems demand. We hope you will challenge us to provide the best solutions for your requirements.

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