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Capacitor Engineering Bulletins
Engineering Bulletins addressing specific subjects related to capacitor characterisitics or applications
- Capacitors - ESR Characterization
An overview of ESR and how it affects the life and operation of a pulsing capacitor
- Capacitors - Polarization and Leakage Currents
An overview of the mechanisms and impact of polarization and leakage currents in film capacitors
- Capacitors - Comparison of Metallized Electrode vs Discreet Foil Capacitors
Compares the operation, pros and cons of metallized electrode vs discreet foil capacitors for pulsed power applications
- The Effect of Reversal on Capacitor Life
Reversal is a critical parameter in the selection or design of DC and energy discharge capacitors
- High Energy Capacitors
Overview of large energy storage pulse discharge capacitor capability and technology and the resulting applications
Capacitor Conference Proceedings/Research Publications
Conference proceedings/research publications presenting the status or summary of a specific research project related to capacitor development or performance
- Recent
Advances in High Voltage, High Energy Capacitor Technology
On-going research in film capacitor technology and dielectric
materials has resulted in increased energy density, longer life,
lower temperature operation, faster discharge and higher reliability.
- Large
High Energy Density Pulse Discharge Capacitor Characterization
The performance issues of limited life pulsed discharge capacitors
operating at better than 2 J/cc (2MJ/m3) in the 5kV to 20kV range
- High
Energy Density Capacitor Characterization
How film capacitors with energy densities greater than 1 J/cc
and suitable for millisecond discharge applications requiring limited
life are characterized
- Repetitive
Pulse Application of Self-Healing High Voltage Capacitors
Use of self-healing capacitors for repetitive pulse
power systems using today's technology and future performance
improvements
- Modeling
Energy Storage Capacitors or When A Capacitor Is Not A Capacitor
Methods used to model energy storage capacitors for predicting performance in
large pulsed power systems
- High
Voltage Capacitors Designed to Avoid Catastrophic Failure
Modes
Discussion of capacitor failure modes, capacitor designs and
a solution to catastrophic high voltage capacitor failures
- Performance
and Safety of Large Energy Discharge Capacitors
Discussion of large capacitors under normal, fault and failure
conditions and the safe operation of large capacitors
- Progress
in the Reduction of Inductance in the Standard 100 kV Energy
Storage Capacitor
The inductance of existing designs is compared with new prototype
configurations with a goal of reducing inductance up to 50%
- Recent
Developments in Pulse Power Capacitors
Examples of pulse power capacitors with several styles of packaging
and a variety of dielectric/electrode systems
- Capacitor
Technology for Combat Hybrid Power Systems (CHPS)
The National Research Council's Committee on the Assessment
of Combat Hybrid Power Systems evaluated and addressed capacitors as
one of the emerging technologies required for further development
of hybrid power systems for advanced combat
systems. Chapter 6 describes the types of capacitors most relevant
to CHPS and was co-authored by GA-ESI, Fred MacDougall.
- Design
Optimization Of Linear Transformer Driver (LTD) Stage Cell
Capacitors
The characterization and analysis of Linear Transformer
Driver (LTD) cell capacitors in pulsed power generators using both
an analytical equivalent circuit model and a SPICE simulation mode
- ZR
Marx Capacitor Life Test And Production Statistics
Reviews the life data and compares the Weibull distribution of
P/N 32896 with a distribution derived from combining the life
data from two similar designs.
- ZR
Marx Capacitor Vendor Evaluation Results and Procurement
Strategy
A summary of how the Scyllac-style 2.6 uF,
30 nH, 100 kV, 35% voltage reversal capacitor lifetime
specifications were determined,
the test results of the most successful candidates, and
the procurement strategy by Sandia
National Laboratories
- ZR
Marx Capacitor Lifetime Test Results
A summary of the results of lifetime testing of General Atomics 2.65 uF, 100
kV, 30 nH, 35% voltage reversal capacitors being used in the Z machine at Sandia
National Laboratories
- Development
of Low Inductance High Power Plastic Case Capacitors For
The SNS
Polyphase Resonant Converter-Modulator
The converter-modulator system requires seven unique, low inductance plastic
case capacitors with applications ranging from 2 to 120kV, with voltage and
current reversals up to 100%
- 100
kV Capacitor Development for Fast Marx Generators
Two 1.35 µF, 100 kV, 2.6x24x38” plastic case capacitors
with rail terminals along each end resulted in Marx stage inductance < 100nH
- Energy
Density of Film Capacitors for ETC Gun Applications
Review of the basic properties of wound film capacitors & projections of
PVdF capacitors using today’s manufacturing techniques
- High
Energy, Low Inductance, High Current Fiberglass Energy Storage
Capacitor
For The Atlas Machine Marx Modules
34.1 µF, 60 kV, 650kA, 13 x 29 x27" double
ended plastic case energy storage capacitor with an inductance
of ~22nH
- Self-Healing
Pulse Capacitors for the National Ignition Facility (NIF)
83.5 kJ, 24 kV capacitor designs with lifetimes > 20,000 shots and energy
densities as high as 0.84 J/cc
Power Supply Engineering Bulletins
Engineering Bulletins addressing specific subjects related to power supply characterisitics or applications
- Using Switching Power Supplies with Diode Isolated Capacitor Banks
Charging multiple capacitor banks with one or more power supplies and isolating with diodes to allow the banks to fire at different times
Power Supply Conference Proceedings/Research Publications
Conference proceedings/research publications presenting the status or summary of a specific research project related to power supply development or performance
- Custom Design of Components and Power Supplies for Pulsed Power Systems
Various custom design criteria for energy storage capacitors, energy-absorbing resistors, high current fuses, and capacitor charging power supplies are described
- Interfacing
Pulsed Power Systems to Switching Power Supplies
Simple protection networks can be used to avoid damage to power
supplies in normal operation and in fault situations
- Precision
Capacitor Charging Switching Power Supplies
Power supply and pulsed power interaction at repetition rates in the kilohertz
range with precision charge voltage control
- Practical
Design and Control of a ZVS 3-Level DC-DC Converter with
Minimum Circulating Current
Zero-voltage-switching (ZVS) converter is designed with
ZVS soft-switching techniques to achieve high efficiency
- A
Three-Level DC-DC Converter with Wide-Input Voltage Operations
for Ship-Electric-Power-Distribution Systems
Newly developed converter with zero-voltage-switching (ZVS)
techniques achieved ~95% efficiency over wide 7kW load conditions
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