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| Power Assemblies | Clamps | Heatsinks | Technical Enquiry Form |
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Dynex offer a design, build and refurbishment service for power
assemblies through our Power Assembly Complete Solutions (PACS)
group. The PACS group provides support for those customers requiring
more than the basic semiconductor and utilises the skills of our
power electronics, mechanical and electronic engineers. The team has
direct access to the company’s application, test and product design
personnel to bring you the optimum solution for your needs. Dynex have developed a flexible range of air and liquid cooled heatsink / clamping systems in line with advances in the voltage and current capability of our semiconductors and covering the full range of circuit designs in general use today. Typical applications for Dynex power assemblies include: - High power rectification - Pulse power - Inverters - Soft starts - Battery chargers - Magnet supplies - Resistance welding switches - Variable speed drives - GTO gate drive units - Static compensation |   | |
| Assemblies | ||
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Dynex power electronics, mechanical and electronic engineers are
experts in designing high quality and high reliability power
assemblies for applications where optimised performance is required
in the harshest of environments. There are many factors that need to be taken into consideration to maximise semiconductor performance in the assembly. These are; type of heatsink, transient conditions, overloads, ambient temperature, surface finish (e.g. black anodised), and the method of cooling on which the application relies, (air, liquid or phase change). With a wealth of experience behind them and using CAD software and the vast range of bipolar and IGBT power semiconductor devices and components available, the PACS design team are able to provide customers with a solution which best suits their needs. When water or oil are acceptable as cooling media, single phase and 3-phase bridge assemblies can be made much more compact using our ‘stick stack’ units. These are a very effective method of providing low voltage high current rectifiers, for example, for the Electro Chemical industry. For air cooled assemblies the dual benefit of improving thermal performance and protecting against oxidisation can be gained by specifying aluminium fin with a black anodised finish. Specialist applications such as pulsed power where assemblies are required for use at high voltage, high di/dt and very fast turn on, (e.g., magnet power supplies, crowbar ignitron replacements etc. where many thousands of amps flow for microseconds) are also catered for. |    | |
| Heatsinks | ||
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Dynex has its own proprietary range of extruded aluminium heatsinks
designed to optimise the performance of our semiconductors. We also
have access to a vast range of aluminium extrusions from independent
manufacturers giving our design team the best options available. Water cooled heatsinks (coolers) are available and are compatible with devices up to 100mm silicon diameter. They are designed for use in high current, high power assemblies such as single, three or six phase bridges or A.C. controllers. Complete bridges of up to six devices may be constructed and two coolers per device may be used for double side cooling. |  Heatsink outlines | |
| Clamps | ||
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A line of pre-loaded clamps is offered, from cube clamps for single
side cooling up to 30mm discs and bar clamps up to 83kN for our
100mm disc devices. Bar clamps are suitable for single and double
side cooling, with high insulation versions available for high
voltage assemblies. Clamps can also be supplied separately as a kit of parts. |  Clamp outlines | |
| A.C. Switches | ||
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Dynex offer a comprehensive range of standard water and air cooled
A.C. switch assemblies. This includes isolated heatsink types and
modules with an integral water cooled base plate. (Please see
Thyristor/Diode Module section for datasheets). The water cooled A.C. controllers (discrete device type) range from 300A to 3200A rms welding rating. (Water 40˚C, 4.5 ltrs./min., 5% duty cycle, 20 cycles.) Natural air cooled types range from 400A to 3270A rms. (Tamb. 45˚C, 5% duty cycle, 10 cycles.) Ignitron replacement solid state assemblies are also within this product group and are easily fitted as a direct substitute for a pair of Ignitrons. |  | |
| Sub-Contract Partnership | ||
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Our experienced engineers and assemblers have worked closely with
customers throughout the world to manufacture assemblies to their
requirements. Typically this work has included marine propulsion,
rail traction and power utility applications. The PACS group has
encouraged the philosophy of joint design and build to customer’s
specifications. In addition to new design and build work Dynex also undertake refurbishment of assemblies. This process involves the stripping down of an existing assembly into its component parts and cleaning, replacing, rebuilding and testing the assembly before it is handed back to the customer. This service has proved especially beneficial to railway traction operating companies who do not have the facilites or the skilled engineering staff to undertake this type of work. To discuss ‘partnership’ projects contact your nearest distributor or represenative or e-mail us at: power_solutions@dynexsemi.co | ||
| Copyright © 2008 Dynex Semiconductor Copyright © 1995-2008 I-Next Ltd |
We welcome your comments about this service, please send them to: power_solutions@dynexsemi.com |