Articles tagged with Voltage
Paul Ohodnicki leads a team at Pitt developing medium frequency magnetics for high voltage grid applications, aiming to reduce cost and footprint by three-fold. The project uses $1.9 million in federal funds to design and manufacture transformers.
Researchers at Virginia Tech have developed a new method for removing frost from surfaces using electrostatic defrosting (EDF), which can remove up to 75% of the frost without the need for heat or chemicals. The approach uses high voltage to polarize the frost, creating an electric field that detaches microscopic ice crystals.
Researchers at NIT Puducherry unveiled an energy-efficient model predictive current control (MPCC) method that enhances induction motor drive performance in electric vehicles. The CSVVV-based MPCC introduces a novel way to synthesize voltage vectors, reducing switching losses and current ripple.
Researchers proposed a four-level modulation strategy for dual three-phase open-winding PMSM drives, achieving higher efficiency and lower current harmonics. The proposed strategy reduces average current THD by more than 29% and switching frequencies by up to 90%.
Fraunhofer IAF presents a bidirectional 1200 V GaN switch with integrated free-wheeling diodes, enabling more efficient power electronics for energy generation and mobility. The switch can be used in grid-connected power converters and electric drive systems.
Researchers developed ZTE materials that nearly restore voltage recovery in aging lithium-ion batteries, doubling battery lifespan. The innovation also sheds light on self-healing function design of high-performance devices.
A study published in Heart Rhythm has found that handheld electro-shockers can interact with cardiac implantable electronic devices (CIEDs) such as pacemakers, posing a risk to individuals. The risk is primarily based on the applied voltage, but also on the manufacturer and type of implanted CIED.
A recent study identified a quasi-conversion reaction on the cathode surface during discharging, leading to accelerated battery degradation. High nickel content exacerbates this effect.
A Colorado State University team has achieved a new milestone in 3D X-ray imaging technology by capturing high-resolution CT scans of the interior of a large, dense object using a compact, laser-driven X-ray source. This breakthrough offers a fast and non-destructive way to obtain detailed views inside dense structures.
Physicists at Brown University have observed a novel class of quantum particles called fractional excitons, which behave in unexpected ways. The discovery unlocks a range of novel quantum phases of matter, presenting a new frontier for future research.
Researchers demonstrate transverse thermoelectric conversion in WSi2 for the first time, using mixed-dimensional Fermi surfaces to enable TTE effect. The study paves the way for developing new sensors and efficient thermoelectric materials.
Researchers developed an optimized model for defibrillation that reduces energy consumption by 1,000 times, minimizing cardiac tissue damage and pain. The new approach exploits the sensitivity of fibrillation to small changes in electrical field profiles.
The Department of Energy awarded nearly $1 million to researchers at the University of Arkansas to develop a prototype for high-voltage power modules that can handle higher voltages and temperatures. The goal is to create smaller, more efficient, and more reliable fast-charging stations for electric vehicles.
Researchers at North Carolina State University developed a new method to visualize interfaces in organic solar cells, revealing design rules to improve efficiency. The study found that sharp donor-acceptor interfaces are key to reducing voltage losses.
A team of researchers from Tokyo Institute of Technology elucidated the mechanisms of electron transfer in upconversion organic light-emitting diodes, resulting in improved efficiency. They discovered a novel donor-acceptor combination that led to the fabrication of an efficient blue UC-OLED with an extremely low turn-on voltage.
Researchers develop a modular approach to scaling quantum processors using semiconductor technology and long-distance entangling links. This enables the creation of small arrays of qubits that can be connected to form larger systems, overcoming challenges in controlling individual qubits and maintaining coherence.
A recent study by Harvard University researchers compares the effectiveness of one-photon (1P) versus two-photon (2P) voltage imaging in neural circuits. The study found that 2P excitation requires approximately 10,000 times more illumination power per cell compared to 1P excitation, posing significant challenges for 2P voltage imaging.
Researchers design Na0.6[Ni0.3Ru0.3Mn0.4]O2 and vacancy-introduced Na0.7[Ni0.2V0.1Ru0.3Mn0.4]O2 compounds to enhance sodium-ion battery performance. The V-NRM compound exhibits improved capacity and rate performance, with an additional short voltage plateau at 3.9V during charging.
A new study reveals that metallic minerals on the deep-ocean floor can produce oxygen, even in complete darkness. This discovery challenges long-held assumptions that only photosynthetic organisms generate Earth's oxygen and has significant implications for our understanding of the origin of life.
Researchers successfully controlled Andreev bound states in bilayer graphene-based Josephson junctions using gate voltage, observing changes in real-time and confirming theoretical predictions. The discovery enables adjustment of energy levels, opening potential for diverse applications.
Researchers proposed an active equalization strategy to minimize cell inconsistencies in series-connected lithium-ion battery packs. The strategy utilizes a dual threshold trigger mechanism and energy transfer path optimization, significantly reducing cell inconsistencies and enhancing pack performance.
A research team at Pohang University of Science & Technology has developed a new type of hafnia-based ferroelectric memory device that can store 16 levels of data per unit transistor. The device operates at low voltages, high speeds and exhibits stable characteristics.
Researchers found that plants produce electric potential in sync with their daily cycles, which can be harnessed as a renewable energy source. The study discovered that the electric streaming potential increases with decreased ion concentration and increased pH.
Researchers from Pohang University of Science & Technology have developed a high-energy, high-efficiency all-solid-state sodium-air battery that can reversibly utilize sodium and air without additional equipment. The breakthrough overcomes the challenge of carbonate formation, increasing energy density and reducing voltage gap.
Researchers have identified a class of materials called antiferroelectrics that produce an electromechanical response up to five times greater than conventional piezoelectric materials, even in films as thin as 100 nanometers. This breakthrough could enable the development of next-generation electronics and devices.
A team from Pohang University of Science & Technology has developed a memory transistor that can adjust its threshold voltage through photocrosslinking. The innovation combines two molecules with a polymeric semiconductor to form a stable bond, enabling precise control of the semiconductor layer's structure.
A new DC-DC power converter designed by Kobe University team offers superior voltage ratio, system stability, and simplicity, achieving an impressive efficiency of up to 98.3%. The device can efficiently interface with various energy sources, making it suitable for renewable energy integration and electric vehicle applications.
Researchers visualize chiral interface state at atomic scale for the first time, allowing on-demand creation of conducting channels. The technique has promise for building tunable networks of electron channels and advancing quantum computing.
A semiconductor device called a Z-source inverter can rapidly reduce voltage and current in the case of a short-circuit or open-circuit fault, protecting against power surges and fires. This innovation can be used to retrofit existing infrastructure and create a safer energy grid.
Researchers have discovered a way to stick hard and soft materials together using electricity, forming chemical bonds that can be easily reversed. This electroadhesion effect could enable the creation of biohybrid robots and improve biomedical implants.
Researchers at KTH Royal Institute of Technology developed an open-source AI solution to address voltage fluctuations in power grids caused by renewable energy and electric vehicles. The DRL algorithms optimize large-scale coordination of energy sources safely under fast fluctuations.
Scientists at Shanghai Institute of Microsystem and Information Technology enhance the photon-number-resolving capability of single-photon detectors by widening superconducting strips. This results in better dynamic range and fidelity, enabling true-photon-number resolution up to 10.
Researchers develop electrochemical method to release hydrogen stored in hydrogen boride sheets, achieving high Faradaic efficiency. The process is expected to contribute to the development of safe and lightweight hydrogen carriers with low energy consumption.
A research team found that voltage hysteresis in Li2RuO3 is attributed to different intermediate crystalline phases formed during charge and discharge processes, not irreversible structure changes. This discovery challenges conventional theory and has implications for developing high-energy-density lithium-ion batteries.
Researchers at UNIST have achieved a significant breakthrough in organic semiconductor synthesis by synthesizing a novel molecule called BNBN anthracene. This derivative exhibits unique properties, including precise modulation of electronic properties without structural changes.
Researchers from Nagoya University found that electric eel discharges can genetically modify small fish larvae, demonstrating the potential for electroporation in nature. The study's findings suggest that electric fields can affect gene transfer in organisms, leading to new insights into genetic modification.
Electric current in certain materials flows as a continuum rather than with discrete quasi-electrons, according to new research. This challenges the traditional picture of electrons and quasiparticles.
Researchers developed a wireless, leadless pacemaker that can partially recharge its battery by converting mechanical energy into electrical energy. The device harvested approximately 10% of the energy necessary to pace the next beat, paving the way for longer battery life and reduced procedures for younger patients.
Researchers at Stockholm University have discovered a unique ion transporter, SLC9C1, that activates in response to chemo-attractants, triggering increased sperm motility. This finding provides new insights into the intricate mechanisms governing fertilization.
Researchers propose analysis protocol to evaluate feasibility of silicon-containing batteries with reduced particle size and uniform dispersion. The study finds promising results from innovative synthesis technology and initial efficiencies exceeding 90% with improved lifespan characteristics.
A breakthrough in battery technology has been achieved by City University of Hong Kong, overcoming the persistent challenge of voltage decay in lithium-ion batteries. The new development stabilises a unique honeycomb-like structure within the cathode material, resulting in longer-lasting and more efficient batteries.
A new strategy optimizes optical and electrical characteristics of thin c-Si solar cells, improving conversion efficiency by 28% compared to industrial thick counterparts. The proposed design uses a layer transfer method and metal nanofilms for enhanced light absorption and surface passivation.
The project aims to assess the operational resilience of microgrids on DoD installations and ships, using new operational resilience indexes developed by Lehigh University researcher Javad Khazaei. The team will develop a dashboard to monitor resilience indexes in real-time, providing recommendations for improving the systems.
A new study by Edith Cowan University has discovered zinc-air batteries as a superior alternative to lithium-ion, offering low costs, environmental benefits, and high theoretical energy density. The breakthrough redesigns the batteries using natural resources like zinc from Australia and air, enhancing their viability for sustainable e...
Researchers at NTU Singapore have developed a method to read data stored in antiferromagnets, allowing for potential energy-efficient and high-speed computing. This breakthrough could lead to the creation of new memory chips with improved performance and capacity.
A team of researchers has discovered a way to harness random telegraph noises in semiconductors, generating high-amplitude signals and manifesting inherent quantum states. By introducing vanadium into tungsten diselenide, they created a device that can switch between two stable states using voltage polarity.
Researchers found that nematode worm larvae can leap through the air and attach themselves to passing insects when exposed to certain electric fields. They observed dauer larvae consistently moving towards the lid of a petri dish, some reaching it in a fraction of a second.
A KAUST-led team has developed a proton-mediated approach that produces multiple phase transitions in ferroelectric materials, potentially leading to high-performance memory devices. The method enables the creation of multilevel memory devices with substantial storage capacity, operating below 0.4 volts.
Scientists identified structural origin of voltage hysteresis in manganese-rich NASICON-type cathodes and developed Mo-doping strategy to decrease defect concentration. This led to improved Coulombic efficiency and reversible capacity in Na-ion batteries.
Researchers at Queen Mary University of London have created a new type of electric variable-stiffness artificial muscle with self-sensing capabilities, revolutionizing soft robotics and medical applications. The innovative technology enables rapid reactions and force sensing, making it ideal for integration into intricate robotic systems.
A team of SUTD researchers discovered a novel intrinsic nonlinear planar Hall effect, proposing a mechanism to characterize novel materials and their complex behaviors. This effect could lead to new designs in nonlinear rectifiers or terahertz detectors for long-range communications.
Researchers at KAUST developed smart digital image sensors that can recognize images with high accuracy, using a charge-trapping 'in-memory' sensor sensitive to visible light. The devices have an extremely long-lived retention time of up to 10 years and can perform optical sensing, storage, and computation.
Scientists have successfully engineered multi-layered nanostructures of transition metal dichalcogenides to form junctions, enabling the creation of tunnel field-effect transistors (TFETs) with ultra-low power consumption. The method is scalable over large areas, making it suitable for implementation in modern electronics.
Researchers at Texas A&M University have identified a new circuit element called the meminductor, which exhibits memory-like properties. The discovery was made using a two-terminal passive system and proved the existence of meminductance in an inductor circuit element.
Researchers from Chinese Academy of Sciences have doubled lithium storage capacity in hard carbon anodes by exploring lithiation boundary parameters. The study reveals the dual effect of lithium intercalation and reversible lithium film as key to high-reversible capacities.
Texas A&M researchers have found a significant increase in energy storage capacity of water-based battery electrodes, paving the way for safer and more stable batteries. The discovery could provide an alternative to lithium-ion batteries, which are facing material shortages and price increases.
Researchers at IISc have developed a novel ultramicro supercapacitor with enhanced electrochemical capacitance, exceeding 3000% increase in capacitance under certain conditions. The device uses Field Effect Transistors as charge collectors and solid gel electrolyte for improved electron mobility.
Scientists at Kyoto University have established a new experimental method to examine ultra-light dark matter, addressing the challenging problem of detection. By applying millimeter-wave sensing technology in cryogenic conditions, they were able to detect dark photons with a mass range previously unexplored.
Brazilian researchers used a high-speed camera to capture an image of lightning rods trying to connect to nearby buildings, revealing details of the connections. The image shows that even with multiple lightning rods in place, the strike connected to a smokestack on top of one building, highlighting the importance of proper installation.
Researchers have developed a smart contact lens capable of implementing AR-based navigation using a novel electrochromic display technology. The device uses Prussian blue to display directions to the user in real-time, overcame limitations of existing AR devices.