Electronic Principles Essay example
Engineering and Construction
Pages 20 (5020 words)
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I. Semi-conductor Devices and Circuits There are two types of rectification, the half-wave and full-wave rectification. I.1 Half-wave rectification The simplest rectification is the half-wave rectifier circuit with a single-phase diode. This circuit has only one diode, a resistor load and a capacitor.


The other terminal of the secondary transformer provides the negative. The load is cut across by the resistor. Figure 2 Voltage and current waveform of a half-wave rectifier Voltage relationship The half-wave rectifier states that the load voltage vL is Vdc and expressed in the following diagram. The load voltage is equal to 0 and the angular frequency of the source is w = 2? = T. This is expressed in the following diagram. From the diagram above, we can get the half-wave: Half-wave Vdc = Vm = 0.318Vm ? I.2 Full-wave rectification The full-wave rectification can be produced in two types: the center-tapped and the bridge rectification. I.2.1 The full-wave center-tapped The full-wave with center-tapped transformer has two diodes acting as half-wave rectifiers and whose negative ends are connected to the two terminals of the transformer secondary. The two diodes provide a full-wave output. The DC currents of the two half-wave rectifier diodes are equal and opposite. (Lee & Chow 2011, p. 150) Figure 3 Schematic diagram of full-wave rectification with center-tapped transformer secondary I.2.2 The bridge rectifier The bridge rectification uses four diodes to provide full-wave rectification, and this does not use a center-tapped transformer. ...
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