Power Assemblies Applications

Power Assemblies Applications

Dynex provide power assemblies products for those customers that require more than the basic semiconductor components. We are able to design power assemblies with tailored semiconductors.



Our Offerings

Specialising in the design and manufacture of assemblies such as rectifiers and converters, Dynex has an established supply chain for all components of power assemblies, resistors and capacitors for snubber networks and control circuits.

Our highly skilled power electronics, mechanical and electrical engineering experts have direct access to the company’s wider application, test and product design groups.

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Active Front End IGBT rectifiers

Hydrogen Production by Electrolysis

Dynex power converter technology is ideally suited for power supplies needed for hydrogen electrolysis applications.

  • Active Front End IGBT rectifiers for high efficiency, unity power factor and low harmonic DC supply
  • High power SCR and Diode rectifiers designed for Hydrogen Electrolysis

Dynex is uniquiely able to design power converters with its own tailored semiconductors, as well as benefiting from expert knowledge of wear out mechanisms and capability outside of the common operation. Using the latest IGBT AFE (Active Front End) technology our supplies are optimised in terms of efficiency, size, power factor correction and harmonic distortion.

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Tokamak Energy provided with a Merging Compression Power Supply

Fusion Energy

Dynex have provided converter designs to support Fusion Energy research efforts around the globe.

Our vertically integrated supply chain enables us to understand our semiconductors and their performance, as well as tailor our devices to the specific requirements of the application. This is especially relevant for Fusion research, where often the best possible device is not available on the market. 

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Air Cooled Power Assembly

Grid linked Power Equipment

  • Excitation Systems
  • Power Conditioning
  • Hydrogen Production

Dynex engineers are engaged in providing tailored power assemblies for hydro dam excitation, power factor correction and rail traction. Dynex are also part of several hydrogen production projects powered from grid distribution.

Collaborating with renewable generation partners and electrolysis system providers, Dynex are working towards topologies and system architectures that provide a power source bespoke to the generation of Hydrogen from a stochastic source, improving the efficiency of production, as well as preventing premature degradation of electrodes due to fluctuations in power.

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Laboratory and Pulsed Power Equipment

Laboratory and Pulsed Power Equipment

Highly customised test equipment made to end user exact specifications

High Power Rectifier

  • 210kVac / 40kAdc (Short period) rectifier
  • Device health monitoring
  • Unique tray design

High Current/Voltage Rectifier

  • High current configuration (220kAdc, 1.9kVac)
  • High Voltage configuration (100kAdc, 3.3kVac)
  • Constructed in 9 cabinets

GTO Pulse Power Fuse Tester

  • 38kJ of energy delivery, up to 4kVdc
  • Up to 5kA/us di/dt

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Standardised Products

Standardised Products

Rectifiers, AC Switches and Gate Drives

  • A selection of standardised outlines in proven natural convection, forced air and water cooled designs.
  • A range of standard clamps matched to our devices with options on mounting and isolation
  • Options for Gate Drives for high isolation
  • Snubbers designed to suit application
  • Options for resistance to corrosive environments

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Traction Repair and Maintenance

Railway Converter Maintenance, Repair, Obsolescence Management and Repowering.

  • Converter for mid-life upgrade/overhaul
  • Reliability improvements
  • Spares and Repairs
  • Propulsion modernisation and upgrade
  • Obsolescence management
  • Support for track side applications such as rectification circuits

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- Power Assemblies Fequently Asked Questions

Does Dynex include safety features in power supplies for hydrogen production electrolysis?

Dynex recognise that with the production of hydrogen, safety is paramount due to the flammable nature of hydrogen gas. The power supply should have safety features such as overcurrent protection, overvoltage protection and temperature monitoring to prevent accidents

This is why Dynex power supplies feature an MCCB on the input side that has a trip that can be customer controlled to instantly cut power in the case of an emergency shutdown.

What is the role of power converter technology in hydrogen electrolysis applications?

Power conversion is essential in hydrogen production to reduce energy consumption and lower operational costs.

Power converters play an important role in hydrogen electrolysis by facilitating the efficient and controlled supply of electrical energy. They are designed to allow for the precise control of voltage and current which is crucial for controlling the rate of electrolysis reaction and optimising efficiency. Power converters enable adjustments to meet the specified process conditions. 

Dynex application engineers have a wealth of experience in designing power converters and are able to match and refine a power supply to meet the customers needs, whether that be DC ripple requirements, space limitations or differing incoming supply voltages.

What is an active front end (AFE) IGBT rectifier and how does it differ from a diode rectifier?

An AFE IGBT is an electrical power conversion system used to convert AC into DC with presice control, efficiency and reduced harmonic distortion. This technology is used  in applications such as industrial motor drives and renewable energy systems offering improved power quality, energy savings and energy recovery mechanisms.

The difference between an AFE IGBT rectifier and a traditional rectifier (which are passive and provide limited control), is that it converts AC into DC voltage with significantly reduced harmonic distortion and improved power factor achieved by actively controlling the switching of the IGBTs to shape the output waveform and minimise distortions.


What are semiconductor power assemblies?

They are systems that integrate semiconductor devices, such as IGBT's, diodes and thyristors into a single package - a power assembly. 

Power Assemblies are designed and configured for specific applications to control and convert electrical energy efficiently. They are often modular in design to allow easy installation, simplify maintenance and reduce downtime. They also typically incorporate cooling mechanisms such as heatsinks or liquid cooling systems to dissipate excess heat.

Dynex power assemblies can be fully customised to meet the unique requirements of a particular application. 

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If you need to talk to us about any of our products or services, get in touch.

+44 (0)1522 502 901

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Product & Capability Brochure

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