Wenting Liu, Xianzhong Sun, Xinyu Yan, Yinghui Gao, Xiong Zhang, Kai Wang, Yanwei Ma,
Capacitors exhibit exceptional power density, a vast operational temperature range, remarkable reliability, lightweight construction, and high efficiency, ... There exist two primary categories of energy storage capacitors: dielectric capacitors and supercapacitors. Dielectric capacitors encompass film capacitors, ceramic dielectric capacitors, and electrolytic ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2024 - Multidisciplinary Digital Publishing Institute | Batteries
Lifeng Zhu, Shiqing Deng, Lei Zhao, Gen Li, Qi Wang, Linhai Li, Yongke Yan, He Qi, Bo‐Ping Zhang, Jun Chen, Jing‐Feng Li,
Dielectric capacitors with high energy storage performance are highly desired for next-generation advanced high/pulsed power capacitors that demand miniaturization and integration. However, the poor ... the major challenge for practical applications of dielectric capacitors. Herein, we propose a heterovalent-doping-enabled atom- ... the energy-storage density for AgNbO3-based multilayer capacitors. An ultrahigh breakdown strength ~1450 kV·cm-1 ... in the Sm0.05Ag0.85Nb0.7Ta0.3O3 multilayer capacitors, especially with an ultrahigh Urec ~14 J·cm- ...
Tópico(s): Microwave Dielectric Ceramics Synthesis
2023 - Nature Portfolio | Nature Communications
... paper develops and tests a method for balancing capacitor voltages in 7-level flying-capacitor (FC) inverters, which are operated by the wavelet ... WM) technique. This multi-level inverter has two capacitors in each pole, whose voltages deviate due to ... and no circulating currents, the voltage across each capacitor has to be maintained very close to its reference value. The proposed method to balance the capacitor voltage is based on adjusting the scales of ... pulses produced by the WM technique. The proposed capacitor voltage method is structured using a proportional-integral ...
Tópico(s): Microgrid Control and Optimization
2023 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Industry Applications
Springer Link
Jami Torki, Charles Joubert, Ali Sarı,
Due to their high specific volumetric capacitance, electrolytic capacitors are used in many fields of power electronics, ... strongly with frequency, temperature and aging time. Electrolytic capacitors are among the components whose lifetime has the ... academic research have been devoted to improving reliability capacitor. Industrial applications require more reliable power electronic products. ... is in this context that the different electrolytic capacitors and their characteristics are discussed. The aging process ...
Tópico(s): Advancements in Battery Materials
2022 - Elsevier BV | Journal of Energy Storage
Fangming Han, Ou Qian, Guowen Meng, Dou Lin, Gan Chen, Shiping Zhang, Qijun Pan, Xiang Zhang, Xiaoguang Zhu, Bingqing Wei,
Filter capacitors play a critical role in ensuring the quality and reliability of electrical and electronic equipment. Aluminum electrolytic capacitors are the most commonly used but are the ... areal and volumetric capacitance of electric double-layer capacitors should make them ideal miniaturized filter capacitors, but they are hindered by their slow frequency ... integrated carbon tube grid-based electric double-layer capacitors with high areal capacitance and rapid frequency response. These capacitors exhibit excellent line filtering of 120-hertz voltage ...
Tópico(s): Dielectric materials and actuators
2022 - American Association for the Advancement of Science | Science
Jongouk Choi, Hyunwoo Joe, Changhee Jung,
... of battery, energy harvesting systems rely on a capacitor-backed checkpoint mechanism also known as just-in- ... outage occurs—using the energy buffered in the capacitor—and restores the checkpointed data from NVM in ... were nonvolatile, it turns out that due to capacitor degradation, energy harvesting systems can unexpectedly fail the ... CapOS. At a high level, CapOS diagnoses the capacitor in a reactive yet safe manner. When the JIT checkpoint failure occurs, CapOS detects the capacitor degradation without causing the data corruption. To recover ...
Tópico(s): Parallel Computing and Optimization Techniques
2022 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Zhuyu Xun, Hongfa Ding, Zhou He, Wentao Zhou, Yue Zheng,
A novel nine-level switched-capacitor multilevel inverter (SCMLI) with reduced capacitance and balanced capacitor voltage is proposed in this article. Utilizing only two capacitors, the proposed SCMLI can boost the input voltage ... under different kinds of load conditions. The controllable capacitor charging speed in the proposed SCMLI depends on ... of the devices in conventional topologies. The two capacitors can be charged or discharged independently by a ...
Tópico(s): Microgrid Control and Optimization
2022 - Institute of Electrical and Electronics Engineers | IEEE Journal of Emerging and Selected Topics in Power Electronics
Silpa Baburajan, Haoran Wang, Fabio Mandrile, Bo Yao, Qian Wang, Dinesh Kumar, Frede Blaabjerg,
... systems is the requirement for a bulky dc capacitor due to the presence of large dc-link ... the cost and volume of the dc-link capacitors but also decreases its lifetime, which must be ... aspect. This article proposes a new dc-bus capacitor design method for a multidrive system, focused on the capacitor sizing, cost reduction, and lifetime improvements. First, an analytical model to obtain the dc-link capacitor current in a multidrive system is proposed, which would aid the designers to configure the dc-capacitor current in systems having numerous multiple drives. Next, ...
Tópico(s): Microgrid Control and Optimization
2022 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Electronics
Springer Link
Mohammad Ali Hosseinzadeh, Maryam Sarebanzadeh, Cristian García, Ebrahim Babaei, José Rodríguez, Ralph Kennel,
Multisource switched-capacitor multilevel inverters are proper topologies when multiple dc sources are available as renewable energy sources. However, these multilevel ... requiring a large number of power semiconductors and capacitors and a low boost factor to achieve a ... This article presents two configurations for multisource switched-capacitor multilevel inverters. First, a basic multisource switched-capacitor topology is proposed with a small number of capacitors and semiconductors that produce a zero voltage level ...
Tópico(s): Silicon Carbide Semiconductor Technologies
2022 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Electronics
Jiale Sun, Bingcheng Luo, Huanxin Li,
... EES) devices with high‐power density such as capacitors, supercapacitors, and hybrid ion capacitors arouse intensive research passion. Recently, there are many ... the electrode and electrolyte for supercapacitors and hybrid capacitors (HCs), though these reviews always focus on individual supercapacitors or single HCs. Herein, the conventional capacitor, supercapacitor, and hybrid ion capacitor are incorporated, as the detailed description of conventional capacitors is very fundamental and necessary for the better ...
Tópico(s): Conducting polymers and applications
2022 - Wiley | Advanced Energy and Sustainability Research
Springer Link
Rajeev Gupta, Adesh Kumar, A. Biswas, Rajesh Kumar Singh, Anita Gehlot, Shaik Vaseem Akram, Ajay Singh Verma,
... recent developments, applications, and the analysis for different capacitors on distinct dielectric materials namely: Tantalum Oxide Capacitors; Interlayer Dielectric Capacitors; Voltage Tunable Perovskites, and Non-ferroelectric microwave capacitors; High Dielectric Constant Polymer Based Pastes; High Dielectric ... Ferroelectric Polymer-Based Composites for Thin Film Flexible Capacitors and Electrochemical Double Layer Capacitors. Moreover, the overview of the status and trends ... addressed. Finally, the future directions for developing viable capacitor technologies for advanced miniature electronic devices.
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2022 - Elsevier BV | Journal of Energy Storage
Capacitors, as the basic building block of power electronics and electrical systems, are the major constraint of ... knowledge basis for converting polymeric films to functioning capacitors desired in actual applications. The authors tackled the ... film de-wrinkling, optimal metallization, static elimination, and capacitor fabrication improvement. The authors discovered various fabrication challenges ... disconnects. To fabricate a high yield of PEI capacitor bobbins, it is necessary to utilize static eliminators ( ...
Tópico(s): High voltage insulation and dielectric phenomena
2022 - Elsevier BV | Materials Today Energy
Moein Ghadrdan, Saeed Peyghami, Hossein Mokhtari, Huai Wang, Frede Blaabjerg,
Capacitors are one of the most critical components in power electronic converters, yet they are notoriously susceptible to failure. Avoiding unforeseen outages caused by capacitor failures is one of the most effective approaches ... of methods have been proposed to monitor a capacitor health condition based on different degradation indicators. This ... based on the accurate measurement of an electrolytic capacitor dissipation factor (DF) to detect its end-of- ... Since the DF is affected by both the capacitor resistance and capacitance simultaneously, it can provide more ...
Tópico(s): Electromagnetic Compatibility and Noise Suppression
2022 - Institute of Electrical and Electronics Engineers | IEEE Journal of Emerging and Selected Topics in Power Electronics
IEEE Xplore
AL-Wesabi Ibrahim, Zhijian Fang, Zhiguo Wei, Hanlin Dong,
Large electrolytic capacitors used in grid-connected and stand-alone photovoltaic (PV) applications for power decoupling purposes are unreliable because of their short lifetime. Film capacitors can be used instead of electrolytic capacitors if the energy storage requirement of the power ... better reliability and have a longer lifetime. Film capacitors have a lower capacitance than electrolytic capacitors, causing enormous frequency ripples on the DC-link ... sliding mode controllers (DSMCs) for minimizing DC-link capacitor, regulating various components of the PV/BES system ...
Tópico(s): Advanced Battery Technologies Research
2022 - Multidisciplinary Digital Publishing Institute | Electronics
Lixia Wang, Lingyu Zhao, Meirong Song, Xie Lixia, Xiaopeng Wang, Xin Li, Yanjie Huang, Min Wei, Jin Qiu, Xianglong Meng, Yang Zhao,
Filtering capacitor with compact configuration and a wide range of operating voltage has been attracting increasing attention for the ... electric signal in modern circuits. Lossless integration of capacitor units can be regarded as one of the ... to conveniently fabricate compact aqueous hybrid integrated filtering capacitors on a large scale, in which a unit ... components, and morphological characteristics of PEDOT:PSS, the capacitor unit exhibits outstanding AC line filtering with a ... at 120 Hz. After rational integration, the assembled capacitors present compact/lightweight configuration and lossless frequency response, ...
Tópico(s): Supercapacitor Materials and Fabrication
2022 - Elsevier BV | Journal of Energy Chemistry