Lecture Notes 9_Reactive

Values 10 pf to 1 nf ceramic alternate layers of

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Unformatted text preview: • Current/Voltage Continuity • Average Current/Voltage • Buck Converter • Power and Energy • Summary Capacitor symbol represents the two separated plates. Capacitor types are distinguished by the material used as the insulator. Polystyrene: Two sheets of foil separated by a thin plastic film and rolled up to save space. Values: 10 pF to 1 nF. Ceramic: Alternate layers of metal and ceramic (a few µm thick). Values: 1 nF to 1 µF. Electrolytic: Two sheets of aluminium foil separated by paper soaked in conducting electrolyte. The insulator is a thin oxide layer on one of the foils. Values: 1 µF to 10 mF. Electrolytic capacitors are polarised: the foil with the oxide layer must always be at a positive voltage relative to the other (else explosion). Negative terminal indicated by a curved plate in symbol. E1.1 Analysis of Circuits (2013-3717) Capacitors and Inductors: 9 – 3 / 12 Inductors 9: Capacitors and Inductors • Capacitors • Types of Capacitor • Inductors • Passive Components • Series and Parallel Inductors are formed from coils of wire, often around a steel or ferrite core. Inductors • Series and Parallel Capacitors • Current/Voltage Continuity • Average Current/Voltage • Buck Converter • Power and Energy • Summary E1.1 Analysis of Circuits (2013-3717) Capacitors an...
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