C1.3 LOSSES C 1.3.1 Impedance and ESR A capacitor creates in AC circuits a resistance, the capacitive reactance (Formula C1-3). There is also certain inductance in the capacitor. In AC circuits it produces an inductive reactance that tries to neutralize the capacitive one. Finally the capacitor has resistive losses. Together these three elements produce the impedance, Z. If we apply an AC voltage over...
C1.2 INSULATION RESISTANCE, IR Figure C1-10. Schematic of the Insulation Resistance IR in a capacitor The dielectric of a capacitor has a large area and a short length. Even if the material is a good isolator there always flows a certain current between the charged electrodes (the current increases exponentially with the temperature). This leakage can be described as a parallel resistance with a...
C1.1 CAPACITANCE The Capacitance is determined by, among other things, the characteristics of the dielectric material. International standards speak of the Dielectric Constant or permittivity, designated by the symbol ε. C1.1.1 Description A capacitor serves as a reservoir for electric charges. The size of the ”reservoir” is called capacitance and is expressed in the quantity F(arad) or As/V. The principle Figure C1-1 shows how...
L.1 Basic principles of inductive components Magnetism The basis for understanding inductors is provided by magnetism and a few fundamental electromagnetic field laws, revealing clear and fundamental knowledge of inductorsand ferrites. The most important phenomena and laws will still perhaps be there from physics lessons: Featured Image Fig. 1.1: Bar magnet Every magnet has a north and south pole (The earth is an enormous...
The aim of this survey is to collect and summarise mounting recommendations of publicly available information from capacitor and resistor commercial component manufacturers. The survey aim is to collect the manufacturer’s recommendations and good tips for capacitors and resistor mounting BEYOND the industry standards. The survey doesn’t aim to provide a complete mounting procedure guidelines as part of specific industrial requirement and standards. Capacitor...
