Filtering Characteristics of Parallel-Connected Fixed Capacitors in LCC-HVDC

Posted by doEEEt Media Group
On November 21, 2024
0

This paper proposed a tuning method for the parameter of parallel-connected fixed capacitors considering the system strength based on the novel filtering technique. The method enables the calculation of the range of required capacitance for filtering under varying power system strengths. By analyzing the filtering performance under various power system strengths, this paper reveals that the variation in power system strength affects the filtering performance of the novel filtering technique.

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Failure Mechanism of Metallized Film Capacitors under DC Field Superimposed AC Harmonic

Posted by doEEEt Media Group
On September 5, 2024
0

Researchers investigated the failure mechanisms of metallized film capacitors (MFCs) under DC/AC-superimposed conditions in HVDC systems. They found that capacitors aged under DC/AC fields experienced shorter lifespans, faster capacitance decay, and greater material degradation than those aged solely under DC fields due to electrode loss and molecular structure damage.

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Film Capacitor Technologies and Applications 2024

Posted by doEEEt Media Group
On September 5, 2024
0

Dennis Zogbi's article on TTI Market Eye analyzes AC and DC film capacitors, their technologies, and applications. It highlights key trends in renewable energy and industrial uses.

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Researchers Achieved Record High Energy Density on-chip Capacitors

Posted by doEEEt Media Group
On August 5, 2024
0

Scientists at Lawrence Berkeley National Laboratory and UC Berkeley have created micro-capacitors with record-breaking energy and power densities using hafnium and zirconium oxide thin films. These capacitors achieve nine times higher energy density and 170 times higher power density than current technologies, enabling more efficient on-chip energy storage for advanced electronics. This breakthrough could revolutionize miniaturized devices like IoT sensors and AI processors.

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Negative Capacitance in Action

Posted by doEEEt Media Group
On August 5, 2024
0

For the first time, researchers have imaged negative capacitance at the microscopic level, revealing how it could enhance energy efficiency in electronics. Led by UC Berkeley, the study published in Nature shows that negative capacitance, where voltage and charge change oppositely, can improve voltage and reduce power needs. This breakthrough, confirmed through advanced imaging and modeling, could significantly impact transistors, batteries, and other electronic devices.

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Negative Capacitor Enable Higher Voltage Systems

Posted by doEEEt Media Group
On August 5, 2024
0

Researchers at DOE's Argonne National Laboratory have created a permanent static negative capacitor, a concept once thought impossible. This new device, detailed in Communications Physics, operates steadily and reversibly, improving energy efficiency by enhancing local voltage in circuits. Using ferroelectric materials, the negative capacitor works in tandem with a positive capacitor to optimize power use. The research was supported by the DOE and HORIZON 2020.

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Comparative Evaluation of Wet Testing and Mechanical Testing for Quality Control of Tantalum Powder in Capacitor Production

Posted by doEEEt Media Group
On July 31, 2024
0

Since production conditions are determined by the consumer, powder evaluation based on the benchmark stress-strain curve remains an important method for the early detection of potential problems.

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Researchers Demonstrated High Energy Storage, High Strength Multilayer Ferroelectric Dielectric Material

Posted by doEEEt Media Group
On July 31, 2024
0

The researchers deduced design optimisation rules for the combination of materials they used. “These rules are expected also to be useful for optimizing other multilayer systems and are therefore very relevant for further increasing the energy storage density of capacitors”, they write in their publication. This paves the way for even better capacitors.

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Researchers Developed Flexible 2D Nanofiller Based Polymer Dielectric for High Energy Capacitors

Posted by doEEEt Media Group
On July 30, 2024
0

Dielectric capacitors are critical components in electronics and energy storage devices. The polymer-based dielectric capacitors have the advantages of device flexibility, fast charge–discharge rates, low loss, and graceful failure.

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Researchers Demonstrated Novel BTO Based Capacitor Heterostructures with 19x Higher Energy Density

Posted by doEEEt Media Group
On July 24, 2024
0

Electrostatic capacitors play a crucial role in modern electronics. They enable ultrafast charging and discharging, providing energy storage and power for devices ranging from smartphones, laptops and routers to medical devices, automotive electronics and industrial equipment. However, the ferroelectric dielectric materials used in ceramic capacitors have significant energy loss due to their material properties, making it difficult to provide high energy storage capability.

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