www.dynexsemi.com Pulsed Power Pulsed Power defined electric
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Pulsed Power
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Pulsed Power
Pulsed Power defined electrical energy that delivered single repeated pulses relatively short duration, such that peak power delivered high average power low. characteristic narrow pulsed power waveforms rate rise current. semiconductor element used switch, this defining parameter. Dynex Semiconductor addressed these problems introducing range products specifically applications pulsed power. These devices based standard catalogue products share many their well proven processes materials have their characteristics enhanced modified give optimum performance pulsed circuits. diversity pulsed power applications, ranging from pulse widths microseconds 100s several milliseconds means that datasheets produced using industry standard methods provide information required complete pulsed power design. choice semiconductor easy. Using over-specified thyristor means wasted emitter area consequent higher cost. additional complication that pulsed power applications mean that semiconductor switch experiences many temperature excursions current pulse heats silicon then cools down between each successive pulse. There trade between magnitude temperature excursion number operations switch shot life. Dynex Power Electronics Group (PEG) able take essential parameters application determine best choice semiconductor. Often this involves actual measurements
Pulse power assembly featuring: liquid cooled thyristors snubber resistors, pulse transformer firing series connected devices with optical interface
extensively equipped reproduce reallife waveforms collection data. capabilities extend peak currents region 500kA voltages 40kV. High repetition rates achieved total
dissipation 50kW. Most applications will require assembly devices series and/or parallel achieve required voltage, peak current, di/dt shot life. Power Assembly
Examples Dynex's Pulsed Power Technology
Application Plasma Initiation Thyratron Replacement Sterilization Power Supply Crowbar Laser Megajoule Voltage 17kV 25kV forward 35kV reverse 15kV 26kV Peak Current (kA) Waveform Half sine 2.5µs Trapezoidal Damped half sine 400µs Exponential discharge Damped half sine di/dt (A/µs) 7500 1200 5000 3200 Frequency Single shot 300Hz 30Hz Single shot Single shot Semiconductor Device Type DCR1673 Phase control thyristor ACR300 Asymmetric thyristor MTN939 Phase control thyristor PT40 Pulse power thyristor PT859 Pulse power thyristor
www.dynexsemi.com
Pulsed Power
Complete Solutions (PACS) group within Dynex over years experience design construction assemblies devices. this time developed flexible range heatsinks clamping systems suitable Dynex Pulsed Power devices. Working closely with PEG, PACS engineers take design concept device type, gate driver, protection thermal management components design finished assembly tailored customer's exact requirements. By-passing protecting load: Crowbar
General Thyratron Ignitron replacement: Advantages over other Switching Technologies (Ignitron, Thyratron) very low) standby power heaters grid bias required toxic materials such mercury used physical orientation Better shock vibration potential Long shot life with proper design easily fitted "high side" switch High average current rating maintenance required
Pulsed power assembly five series connected thyristors with snubber resistors capacitors. assembly designed restricted height.
Typical Applications
Connection energy storage medium inductance load: Pulsed laser power supplies Paint stripping Rock crushers Sterilisers foods, liquids medicines Virus inactivation De-fouling ships hulls Metal forming Rail guns Aircraft launchers De-scaling pipes High-current electron beams modification materials Purification water gases X-ray flash technology
further information PACS capabilities please website http:// www.dynexsemi.com/ products/power_assembly/ index.htm request copy Power Assembly Complete Solutions flier from your nearest representative, distributor sales office. discuss your pulsed power application please E-mail your contact application information power_solutions@dynexsemi.com contact your nearest representative, distributor sales office.
inductance co-axial assembly single shot duty. D.C. voltage sharing resistors fitted between each level.
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Contact
Benelux, Italy Switzerland: Tel: (0)1 Fax: (0)1 France: Tel: (01) (02) Fax: (01) (02) Germany, Northern Europe: Tel: (0)1522 Fax: (0)1522 North America: Eastern Region, Tel: (440) 259-2060. Fax: (440) 259-2059 Western Region, Tel: (949) 733-3005. Fax: (949) 733-2986
Dynex Semiconductor, October 2003, LF5661-1. Replaces March 2001 LF5431-1. PRINTED UNITED KINGDOM.
Rest World: Tel: 1522 Fax: 1522 e-mail: power_solutions@dynexsemi.com website: www.dynexsemi.com
These offices supported representatives distributors world-wide.
(See Dynex website Contact section details).
www.dynexsemi.com
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