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Development of a load current multiplier on a ten-stage linear-transformer-driver module
Chuangsi Cheng1, Hao Wei2, Hanyu Wu2
1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
The Review of Scientific Instruments
|July 1, 2025
Summary
Load current multipliers (LCMs) significantly boosted pulsed power efficiency. Testing an LCM on a linear transformer driver (LTD) module increased short-circuit current by 1.69 times, demonstrating its effectiveness for low-impedance loads.
Area of Science:
- Pulsed Power Engineering
- Plasma Physics
- High Energy Density Physics
Background:
- Pulsed power drivers require efficient energy transfer to low-impedance loads.
- Load current multipliers (LCMs) offer a potential solution for enhancing current coupling efficiency.
- Modifications to existing pulsed power drivers are often complex and costly.
Purpose of the Study:
- To design and experimentally validate a Load Current Multiplier (LCM) for pulsed power applications.
- To investigate the performance enhancement of a linear transformer driver (LTD) module with an integrated LCM.
- To analyze the factors influencing the LCM's current multiplication coefficient.
Main Methods:
- An LCM was designed and integrated with a ten-stage linear transformer driver (LTD) module.
- Experimental measurements of short-circuit current were performed with and without the LCM.
- The influence of load inductance, post-hole convolute parameters, and LTD output power on LCM performance was systematically studied.
- The LTD-LCM system was tested with planar wire array loads.
Main Results:
- Implementation of the LCM increased the LTD module's short-circuit current from 512 kA to 866 kA, achieving a current multiplication gain of 1.69.
- The LCM's current multiplication coefficient was found to be primarily dependent on the load inductance.
- A current multiplication gain of 1.25 was achieved when the LTD-LCM system drove planar wire array loads.
Conclusions:
- Load current multipliers effectively enhance current coupling efficiency in pulsed power systems.
- The LCM design demonstrated significant performance improvement for a ten-stage LTD module.
- Load inductance is the dominant factor affecting the LCM's current multiplication capability, providing crucial insights for future optimization.
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