Characteristics and applications of AC positive voltage regulators, Basic characteristics and applications of AC negative voltage regulators, Basic characteristics and applications of AC power regulators, General principles of DC power sources, Voltage regulation and prevention, Transistor parallel and series voltage regulation,
The number of electronic devices we use in almost every aspect of our lives is increasing day by day. No matter what equipment we use (such as TV, telephone, computer, oven, refrigerator, etc. ), there is absolutely no need for a dc power supply or dc power supply.
Design of power supply or dc supply sources is done in various types depending on usage area and importance. DC power supplies in general; are classified in three main categories as unregulated, regulated and switched. In this chapter; we will develop our design capability by examining all aspects of linear dc power supplies.
DC POWER RESOURCES
All electronic devices require a DC power supply to operate. The most practical and economical way to achieve this tension is to convert the AC voltage, DC tension, in the city grid. The conversion is performed with devices called rectifiers .
Devices called rectifiers or DC power supplies can be designed in a few different ways from simple to complex. This section; The overall structure of a dc power supply consists of the following subjects.
• Basic dc Power Supply
• Rectifier and Filter circuits
• Regulation process
BASIC DC POWER SUPPLY (POWER SUPPLY)
As is known, all electronic devices (such as radio, tape, TV, computer, etc. ) require a DC power supply to operate. The dc energy is obtained practically from the battery or the pouch. This is a very expensive solution. Another alternative to getting dc energy is to use the ac voltage from the city network. The sinusoidal stress in the ac form received from the network is converted to dc stress. DC power supplies are used for this.
The block diagram of a basic dc power source is shown in Figure 1.1. System; rectifier, filter and regulator ( regulator ) is composed of circuits. The AC voltage applied to the system input ( usually city voltage ) is converted to the desired voltage value by means of a transformer.
This ac voltage from the transformer outlet is rectified using rectifier circuits. The rectified voltage is far from an ideal DC voltage, and at least it contains ripples . Filter circuits are used to obtain a full dc voltage and minimize the ripple factor. The final layer used to obtain an ideal dc voltage includes regulator assemblies. Let’s look briefly at the blocks that make up the system.