Power Supplies

RECTIFIER AND FILTER CIRCUITS SCHEMATIC CIRCUIT DIAGRAM

The AC voltage taken from the city network and adjusted to the desired level by means of a transformer is the first step to use a rectifier circuit to convert DC voltage. Rectifier circuits are two types, half wave and full wave. The half-wave rectifier circuit is not sufficient for a quality power supply design. Output voltage is low and pulsed. In designing a good power supply, the tamdalga rectifier circuit must be used. Two types of rectifier circuit can be designed as bridge type and mid point type. A typical bridge type rectifier rectifier circuit and the waveform taken from its output are given in Figure 1.2.

POWER SUPPLIES SCHEMATIC CIRCUIT DIAGRAM 3

The waveform of the signal received from the rectifier output is remote from the dc mark and contains various ripples. Filter circuits are used to minimize the fluctuations on the signal to a minimum dc voltage. There are various types of filter circuits (RC, C, LC, etc.).

The most practical and economical filtration process is done with condensers. In Figure 1.3, the sign and filter operation from the rectifier output are shown graphically. We will not overstate the operation and features of the rectifier and filter circuits. Just a reminder, assuming you know these things beforehand.

Finally, in figure 1.4 a complex dc power supply circuit, the waveform of the output signal and the dc value it can take are given. The capacity value of the condenser used for filtering at the outlet is important. Capacitor with large capacitance gives better results.

POWER SUPPLIES SCHEMATIC CIRCUIT DIAGRAM 5

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