DC regulated power supply is a kind of power supply equipment that outputs a fixed DC voltage, which can maintain the stability of the output voltage in the case of load change and input voltage fluctuation. High-power DC regulated power supply is mainly designed for some application scenarios that require high current power supply and high voltage stability. This article will introduce the principle of high-power DC regulated power supply and its use in detail.
First, the working principle of high-power DC regulated power supply
Constant current source
High-power DC regulated power supply usually uses a constant current source to ensure the stability of the output current when the load changes. Constant current source generally consists of a three-terminal current stabilizing diode and a high-power resistor, by controlling the resistance value of the resistor to adjust the output current.
Power amplifier circuit
In order to output large current, high-power DC regulated power supplies usually use power amplification circuit. The power amplifier circuit will amplify the small current output from the control circuit into a large current output to the load. Common power amplifier circuits include triode power amplifier circuits and MOS tube power amplifier circuits.
Feedback Control Circuit
In order to maintain the stability of the output voltage, high-power DC regulated power supply needs a feedback control circuit to monitor the output voltage and regulate it. The feedback control circuit usually consists of a differential amplifier and a comparator. The differential amplifier will compare the output voltage with the reference voltage, get the difference and amplify it through the amplifier, then compare it through the comparator, and finally adjust the control voltage according to the comparison result to control the stability of the output voltage.
Voltage regulator
In order to protect the load from over-voltage damage, high-power DC regulated power supply will also use a voltage regulator. The regulator maintains the stability of the output voltage by consuming the excess voltage on itself.
Second, the use of high-power DC regulated power supply
High-power DC regulated power supplies are widely used in many fields, especially those devices that require high current and high stability. Here are a few common use scenarios:
Electronic equipment laboratory
Electronic equipment laboratories often need to test and experiment on different electronic devices. High-power DC regulated power supplies can provide stable power for these devices. For example, testing of integrated circuits requires an accurate and stable power supply to ensure the accuracy of test results.
Communication equipment
Communication equipment has very high power requirements, especially for high-power equipment such as base stations. High-power DC regulated power supply can not only provide stable power supply, but also maintain the stability of output voltage when the load changes.
Industrial Automation
Industrial automation equipment usually requires high power supply to drive various motors, servo systems and so on. High-power DC regulated power supplies can provide efficient power supply for these equipments and ensure the stability of output voltage.
Medical Equipment
Medical equipment requires high stability and safety of power supply. High-power DC regulated power supply can provide high stability power supply to ensure the normal operation of medical equipment.
Summary:
High power DC regulated power supply is a kind of power supply equipment designed for equipment that requires high current power supply and has high requirements for voltage stability. Its working principle mainly includes constant current source, power amplifier circuit, feedback control circuit and voltage regulator. High-power DC regulated power supplies are widely used in electronic equipment laboratories, communication equipment, industrial automation and medical equipment and other fields. By providing a stable power supply, the high power DC regulated power supply helps these equipments to operate normally and improve their performance and reliability.
