What are the components of a DC regulated power supply?
The composition of DC regulated power supply
The DC stabilized power supply is mainly composed of four parts: power transformer, rectifier circuit, filter circuit and voltage stabilizer circuit.
1. Power transformer
Power transformer is a kind of soft magnetic electromagnetic component, whose functions are power transmission, voltage conversion and insulation isolation, and is widely used in power supply technology and power electronics technology.
2. Rectifier circuit
A "rectifying circuit" is a circuit that converts alternating current electrical energy into direct current electrical energy. Most rectifier circuits are composed of transformers, rectifier main circuits and filters. It is widely used in DC motor speed regulation, generator excitation regulation, electrolysis, electroplating and other fields. The rectifier circuit usually consists of the main circuit, filter and transformer. After the 1970s, the main circuit is mostly composed of silicon rectifier diodes and thyristors. The filter is connected between the main circuit and the load to filter out the AC components in the pulsating DC voltage. The transformer setting depends on the specific situation. The function of the transformer is to achieve the matching between the AC input voltage and the DC output voltage and the electrical isolation between the AC grid and the rectifier circuit.
The function of the rectifier circuit is to convert the alternating current with lower voltage output by the AC step-down circuit into one-way pulsating direct current, which is the rectification process of the alternating current. The rectifier circuit is mainly composed of rectifier diodes. The voltage after going through the rectifier circuit is no longer AC voltage, but a mixed voltage containing DC voltage and AC voltage. It is customarily called unidirectional pulsating DC voltage.
3. Filter circuit
The filter circuit is often used to filter the ripple in the rectified output voltage, and is generally composed of reactive components, such as a capacitor C in parallel with the load resistance, or an inductor L in series with the load, and various complexes composed of capacitors and inductors. filter circuit.
4. Regulator circuit
A voltage regulator circuit refers to a circuit that can keep the output voltage constant when the input voltage, load, ambient temperature, circuit parameters, etc. change. This circuit can provide stable DC power and is widely used in various electronic equipment.
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