What is a linear DC power supply? What is the working principle of a linear DC regulated power supply?
DC power supply is a device that converts alternating current with positive and negative voltage and current directions into constant DC current through rectification and filtering devices, and maintains a stable current in the circuit.
DC power supply is a device that converts alternating current with positive and negative voltage and current directions into constant DC current through rectification and filtering devices, and maintains a stable current in the circuit.
A DC power supply has two electrodes, positive and negative. The positive electrode has a high potential and the negative electrode has a low potential. When the two electrodes are connected to the circuit, a constant potential difference can be maintained between the two ends of the circuit, thereby forming a current from the positive electrode to the negative electrode in the external circuit. The mainstream DC power supplies on the market are divided into three categories: linear DC power supplies, thyristor DC power supplies, and switch mode DC power supplies.
The advantages of linear power supply are: small ripple, high accuracy, low harmonic interference to the power grid, stable output voltage, and good anti-interference performance. But the power of DC power supply is generally not too high, because the output current of the power supply cannot be too large;
The advantages of thyristor power supply are that it can achieve high power and high current.
The mainstream power supply in the market now is switch mode power supply, which has the advantages of high power factor and small size.
The purpose of DC system: It is widely used in hydraulic and thermal power plants, various substations, and other users who use DC equipment (such as power plants, substations, distribution stations, petrochemicals, steel, electrified railways, real estate, etc.), providing DC power for signal equipment, protection, automatic devices, accident lighting, and circuit breaker opening and closing operations. It is also widely used as a reliable emergency power source in communication departments, computer rooms, hospitals, mines, hotels, and high-rise buildings, with a wide range of applications. The heart of the DC system is the battery, and scientific maintenance of the battery is the core work of the DC system.
