Electrical, Electronics, and Avionics

High voltage systems

Stories

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Briefs: Power
All-in-One, High-Power Microwave System
A device was developed that uses composite-based nonlinear transmission lines (NLTLs) for a complete high-power microwave system, eliminating the need for multiple auxiliary systems. Read on to learn more.
Briefs: Materials
Electrodynamic dust shields (EDSs) are a key method to actively clean surfaces by running high voltages (but low currents) through electrodes on the surface. The forces generated by the voltage efficiently remove built-up, electrically charged dust particles. Innovators have developed a new transparent EDS for removing dust from space and lunar solar cells among other transparent surfaces.
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Briefs: Materials
The work could lead to improvements in the energy density of lithium batteries that power electric vehicles.
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Briefs: Energy
Two-dimensional MXene has become popular in the energy world because of its fast energy storage capability. But unstable voltage output limits applications.
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Briefs: Energy
The work could lead to improvements in the energy density of lithium batteries that power electric vehicles.
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Q&A: Electronics & Computers
Dr. Israel Owens and his team at Sandia National Laboratories have used a crystal smaller than a dime and a laser smaller than a shoebox to safely measure 20 million volts without making physical contact to the electrode.
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Briefs: Energy
Two-dimensional MXene provides fast redox and high-rate energy storage.
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Briefs: Robotics, Automation & Control
A new fabrication technique helps improve the performance of flying micro-robots.
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Q&A: Semiconductors & ICs
Kristin Sampayan from the Lawrence Livermore National Laboratory found a fast way to switch high voltages.
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Briefs: Semiconductors & ICs
The switch has uses in circuit protection systems in the electric power grid, high-power military applications, and power for materials processing.
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Articles: Electronics & Computers
As the vehicle platform size decreases, the pulse power discharge rates of the Energy Storage System (ESS) increase.
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Briefs: Transportation
These are important traits in electronics and electrical systems including electric cars, industrial drills, and electric grids.
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Briefs: Sensors/Data Acquisition
Microscale Electro-Hydrodynamic (EHD) Modular Cartridge Pump
The EHD pump uses electric fields to move a dielectric fluid coolant in a thermal loop to dissipate heat generated by electrical components with a low-power system. The pump has only a few key components and no moving parts, increasing the simplicity and robustness of the system. In...
Briefs: Propulsion
Green Electric Monopropellant (GEM)-Fueled Pulsed Plasma Thruster
NASA required a rocket thruster able to produce a number of pulses at high specific impulse at a relatively low voltage (~300 to 400V). The key problem was that existing propellants for liquid-fueled pulsed plasma thrusters (LPPTs) required high voltages to ablate and accelerate the...
Briefs: Electronics & Computers
Government infrastructure facilities such as water treatment facilities, power plants, laboratories, and the like may be targets for terrorist attacks. Similarly, oil pipelines, power grids,...
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Briefs: Data Acquisition
The Department of Energy's Oak Ridge National Laboratory has developed a direct-current detector technology to help emergency responders safely detect high voltages, which they have...
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Technology Leaders: Energy
Photovoltaic systems are continually evolving to improve their efficiency and financial viability. One trend is to move to larger strings of cells giving higher dc voltages to be...
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Briefs: Sensors/Data Acquisition
Ultra-Thin Capacitive Sensor Has the Least Possible Resistance to Motion
A thin and flexible sensor was developed for sensing sounds, since it can move with the airflow made by even the softest noises. With the least possible resistance to motion, the sensor addresses issues with accelerometers, microphones, and many other similar sensors. The goal...
Briefs: Energy
Power electronics used for routing, control, and conversion of electrical power traditionally utilize silicon semiconductors. These systems tend to be bulky, require active cooling, and are inadequate for...
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Briefs: Semiconductors & ICs
Surface-Field-Enhanced Detection of Deep UV Photons in Silicon Carbide Avalanche Photodetectors
While silicon carbide (SiC) is an ideal material for building ultraviolet (UV) photodetectors, the absorbed photons get recombined in the first few nanometers at the surface due to a large absorption coefficient in the 200- to 250-nm wavelength band....
Articles: Electronics & Computers
The market for higher-voltage automotive systems is expanding. The number of electric vehicles that use battery-powered drive systems having voltage equal to or higher than 48V is...
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Briefs: Energy
High-Energy Lithium Flow Cells with Sulfur Anodes
Li-ion batteries offer considerable advantages such as high gravimetric and volumetric energy densities, and good calendar life and shelf life compared to aqueous systems such as Pb-acid, Ni-Cd, and Ni-MH. Various Li-ion chemistries with different Li-intercalating cathodes have attained significant...
NASA Spinoff: Mechanical & Fluid Systems
Initially designed for use on the Moon, the Electro-Hydraulic Fracturing system — developed at Auburn University with NASA funding — relies upon short, high-pulse power created by...
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Briefs: Aerospace
Innovators at NASA’s Glenn Research Center have developed a variable-frequency, alternating current (AC) power system to enable turbo-electric and hybrid electric propulsion....
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Application Briefs: Photonics/Optics
Advanced driver assistance systems (ADAS) are improving driver and pedestrian safety, providing vehicle capabilities such as pedestrian detection, lane departure warnings, collision avoidance, and...
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Articles: Motion Control
For most electrical engineers, the simple term “motor” means one thing: an electromagnetic rotary-motion unit. Engineers who need linear rather than rotary motion consider adding a mechanical linkage...
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Briefs: Test & Measurement
External Diagnostic Method to Detect Electrical Charging in Complex Ion Trapping Systems
Electron-ionized atom trapping technology is widely used in mass spectrometry and atomic clocks. The complexity of the trapping configuration operating in an ultra-high vacuum system is driven by demands for ultimate sensitivity, performance, and fundamental...
Briefs: Energy
Servo control systems require accurate control of motion parameters such as acceleration, velocity, and position. This requires a controller that can apply current (torque) to...
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Briefs: Mechanical & Fluid Systems
Soft robots are made from soft materials that react to applied voltage with a wide range of motions. Such soft robots contain tremendous potential for future applications, as they adapt to dynamic environments...
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