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Published byLuke Lang Modified over 9 years ago
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Rectification
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AC to DC Electricity distribution –Power stations –Transformers –Transmission lines AC Electronics DC –Smooth –Stable
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Process of rectification Conversion of AC to DC Half-wave Full-wave Dedicated circuits –Contain diodes Semiconductor Thermionic –Power rating Supply current to circuits
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Half-wave rectification Only the positive half- cycle of the AC supply is allowed to pass
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Half-wave rectifier circuit Simple! Single diode ‘Load’ –DC circuit…not really getting DC! V ac Load
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Full-wave rectification Positive AND negative half-cycles converted to ALL positive
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V ac Load Full-wave rectifier circuit Bridge circuit Load –Circuit requiring DC
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Bridge as two potential dividers V out V ac
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Capacitative smoothing V out V ac
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Smoothed output Un-smoothed –Large ripple voltage –Not true DC Low-value smoothing capacitor –R load C small High-value smoothing capacitor –R load C big
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www.search for... Capacitors Rectification PSU Electronic power supplies Bridge rectifiers
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