Activity The Principles Of Half Wave Rectification

Half wave rectification is the simpler of the two basic forms of rectification; however it is also at best half as efficient as compared to full wave rectification. A half-wave rectifier circuit generally consists of two passive components, a diode and a resistive load, plus a source of alternating current as illustrated in Figure 5-2. Notice that the DC output across the load resistor consists of only the positive part of the AC input. This is because the diode only conducts the positive portion of the AC wave from A to B. In addition, only the portion of the AC positive wave above 0.6 volts gets through the diode due to its inherent voltage breakdown condition. Again, this is called the forward-biased condition.

During the negative portion of the AC input the diode is said to be "reversed-biased" since current is trying to flow in the opposite direction from B to A. However, no current can flow due to the diode's one-way valve operation, so the resulting DC output across the load resistor is zero during the negative portion of the wave. Therefore in a half wave rectifier circuit, only the positive portion of the AC input above the 0.6-volt silicon diode breakdown voltage gets distributed across the load resistor. While this is not true DC as yet, the diode and resistor form the beginning of a simple half-wave rectifier power supply circuit.

Forward Biased

Forward Biased

AC Input

Figure 5-2: Example Half Wave Rectifier Circuit

AC Input

Figure 5-2: Example Half Wave Rectifier Circuit

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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