INNOVATION IN CAPACITOR TECHNOLOGY lowest impedance at moderate  frequencies.

INNOVATION IN CAPACITOR TECHNOLOGY lowest impedance at moderate frequencies.

AC capacitor industry has seen almost a complete change in dielectrics, electrodes, and impregnates. Innovation in the capacitor technology is being d...

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Yoshiaki Inayama, MD of Toshiba JSW Power System

AC capacitor industry has seen almost a complete change in dielectrics, electrodes, and impregnates.

Innovation in the capacitor technology is being driven by the shrinking size and low height profile needs of high frequency power converters. While physical sizes of capacitor are reducing, higher ripple and load currents in the power train are also emphasizing the need for the efficiency improvements in capacitors under application stress. With this dichotomy of needs, it has proven that it difficult to meet the dual function of low impedance (high capacitance) and high ripple current capability (low ESR) within only one capacitor technology. Electrolytic capacitors offer the highest capacitance values, therefore the lowest impedance at moderate frequencies below 100 kilohertz, and would appear to be the likeliest choice for low voltage-high current circuits. They are however limited in use due to the power inefficiencies. The key to their increased use would be a marked improvement in AC loss factor and a significant increase in the operating frequency.

In other words better ESR and ESL than is currently available. Since  the electrostatic capacitors (ceramic and polymer film) offer extremely low ESR and ESL and have very low impedance at higher resonance frequencies (into the megahertz range), they would appear to be the logical choice for all high-speed circuits. They are limited in the use because electrostatic capacitors are only available in relatively “low” capacitance values, usually below 10 microfarads. If the capacitance values might be increased, electrostatic capacitors could be used in more extensively in high load current applications, like as output filtering. Because of the inherent stability of electrostatics at high frequency compared to the electrolytic.

Replacing electrolytic with electrostatic capacitors would improve the performance and reliability of the output filter sections.

Capacitor is a key passive electrical component used to store energy in electrical and electronic equipment. In India, demand for electrical capacitor is expected to increase primarily because of rising demand for consumer durables, IT hardware coupled with the use of electrical circuitry in various applications. Various types of capacitors which are available in the market include electrolytic, ceramic, film, solid double layer, carbon, dielectric and paper & plastics. Despite of significant demand for capacitors, India lags behinds in capacitor manufacturing due to lack of the manufacturing base for the same. Although India majorly relies on the import of numerous electronics products, equipments and components from other countries, primarily China, Japan & Taiwan, the country’s Electronic System Design & Manufacturing (ESDM) market has witnessed of the significant transformation over the past few years. In addition, the government’s support of allowing 100% Foreign direct investment in the electronics hardware manufacturing sector has provided an automatic route for increasing electronic component manufacturing, including electrical capacitors in the country.

Capacitor is an impassive dual-terminal electrical component that is used to store energy electrostatic ally in an electronic field. The arrangements of capacitors differ in widely, but each one of them contain at the least two electrical conductors detached by a dielectric, which is commonly known as an insulator. The conductors can comprised of foils, thin films, sintered beads or electrolytes that are all conductive.

The analysts forecast global high-voltage capacitors market to grow at a CAGR of 15.34% over the period 2016-2020.

Capacitors are in most electronic systems and are used to store and release electrical charge, but are different from other batteries in that they cannot themselves produce electrical energy. Capacitors consist of conductors – materials that are capable of passing the electrical charge – separated by the material with low electrical conductivity known as an insulator. Differences in charge can stored on one side of the insulator and rapidly dispersed through the conductor at the other side. Unlike batteries they can be charged quickly and degrade less with use over time.

While the past few years the AC capacitor industry has seen almost a complete change in dielectrics, electrodes, and impregnates. The dielectric has changed from paper to poly-propylene film, the electrode from plain foil to metalized film, metalized papers, or embossed foils, and the fluids have changed from polychlorinated biphenyls (PCB) to those based on hydrocarbon or phthalate ester chemistry. This discusses the rationale behind the changing technology, the improved performance aspects of these new designs, and some of the degradation mechanisms that have accompanied the changes.

According to the latest industry trend and forecasts on the high voltage capacitor market, high-priced components like ceramic and mica are being replaced by cost-effective alternatives in the high-voltage capacitor market. Vendors are expected to introduce many innovative and efficient high-voltage capacitors in the forecast period. The capacitor’s ability is to hold an electric charge is determined by its dielectric components. Miniaturization of components and innovations related to dielectrics are positively impacting the high-voltage capacitor market.

Furthermore, the new high voltage capacitor market also emphasizes vendor strategies in regards to product differentiation through R&D. Vendors are making concentrated efforts to provide superior-quality and highly customized products aimed to fulfilling specific customer requirements. This new research covers the present scenario and the growth prospects of the global high-voltage capacitor market from 2016-2020. To calculate the market size revenue generated by vendors in the market through the sale of high voltage capacitors like plastic films, ceramics, and mica etc.