Direct current (DC) power supply is primarily composed of four main components: power transformer, rectification circuit, filtering circuit, and voltage stabilization circuit.
1. Power Transformer: A power transformer is a soft magnetic electromagnetic component that serves the functions of power transmission, voltage transformation, and insulation isolation. It is widely applied in power technology and power electronics.
2. Rectifier Circuit "A rectifier circuit" is an electrical circuit that converts alternating current (AC) electrical energy into direct current (DC) power. Most rectifier circuits consist of a transformer, a rectifying main circuit, and a filter. It is widely used in various applications such as speed control of DC power motors, excitation regulation of generators, electrolysis, electroplating, and more. Typically, rectifier circuits are composed of the main circuit, filter, and transformer. Since the 1970s, the main circuit has commonly used silicon rectifier diodes and thyristors. The filter is connected between the main circuit and the load, serving to filter out the alternating component from the pulsating DC power supply. The transformer is installed depending on the specific situation. The transformer's role is to match the input AC voltage with the output DC voltage and to provide electrical isolation between the AC power grid and the rectifier circuit. The function of the rectifier circuit is to convert the lower AC voltage output from the AC voltage reduction circuit into a unidirectional pulsating DC power supply, which is the rectification process of AC power. The rectifier circuit is mainly composed of rectifier diodes. The voltage after passing through the rectifier circuit is no longer AC voltage but a mixed voltage containing both DC and AC components. It is conventionally referred to as unidirectional pulsating DC power. Aviation ground power: 2, 36V aviation power supply; 1, 400HZ variable frequency power supply; 7, 115/200V power supply; 2, 27V DC power supply; 5, 400HZ power supply; 12, aviation power supply.
3. Filter Circuit - Filter circuits are commonly used to remove ripple from the rectified DC power supply, typically composed of inductive components. This can include, for instance, connecting a capacitor C in parallel with the load resistor, or a coil L in series with the load, as well as various complex filter circuits composed of capacitors and inductors.
4. Voltage Stabilization Circuit A voltage stabilization circuit is a circuit that maintains a constant output voltage despite changes in input voltage, load, environmental temperature, and circuit parameters. This type of circuit provides a stable DC power supply and is widely used in various electronic devices.
