DC regulated power supply

What is a DC regulated power supply:
A DC regulated power supply is an electronic device that provides DC power to a load device.

The working principle of DC stabilized power supply:
The working process of the main circuit of the DC stabilized power supply is that the input power supply is firstly AC-regulated by the pre-regulated circuit, and then converted into a DC power supply by the main working transformer, and then controlled by the control circuit and the single-chip microprocessor controller. The linear adjustment component is finely adjusted to output a high precision DC voltage source. The details are as shown below:

1. Power transformer and rectification: convert 220V/380V AC power into required DC power.
2. Pre-regulation circuit: Pre-adjust and initial voltage regulation of the input AC or DC voltage by using relay components or thyristor components, thereby reducing the power consumption of linear adjustment components, improving work efficiency, and ensuring high precision of output voltage source. And high stability.
3. Linear adjustment component: Finely adjust the filtered DC voltage to make the input voltage meet the required value and accuracy requirements.
4. Filter circuit: The pulse wave, interference and noise of the DC power supply are blocked and absorbed to the utmost, so as to ensure the output voltage of the DC power supply is low ripple, low noise and low interference.
5. Single-chip microcomputer control system: After the single-chip micro-processing controller compares, judges, calculates, analyzes, etc. the various signals detected, the corresponding control commands are issued to make the overall voltage-stabilizing system of the DC stabilized power supply work normally and reliably. ,coordination.
6. Auxiliary power supply and reference voltage source: Provide high-precision reference voltage source and power supply for electronic circuit operation for DC voltage regulator system.
7. Voltage sampling and voltage regulation: Detect the output voltage value of the DC stabilized power supply and set the output of the regulated DC power supply.
8. Comparing the amplifying circuit: comparing the output voltage value of the DC stabilized power supply with the voltage of the reference source to obtain an error voltage signal, performing amplification feedback and controlling the linear adjusting component to ensure the output voltage is stable.
9. Current detection circuit: obtain the output current value of the DC stabilized power supply for information of current limiting or protection control.
10. Drive circuit: A power amplifier circuit that is provided to drive an executable component.
11. Display: Display of output voltage value and output current value of DC stabilized power supply.

 

The role of DC regulated power supply:
1, power regulator equipment. The function of the power supply voltage regulator is to change the voltage of the AC 220V to the required voltage value, and then the voltage of the sample also changes with the fluctuation of the grid voltage and the temperature of the load.

2. Filter circuit. The filter circuit is used to filter out the ripple in the output voltage, and is generally composed of reactance components. Since the reactance component has energy storage in the circuit, the capacitor C connected in parallel with sd6_1we can store part of the energy when the voltage supplied by the power supply rises, and when the voltage is lowered, the energy can be released to make the load voltage smoother. , that is, C has a flat wave effect

3. Voltage regulator circuit. The function of the voltage regulator circuit is to maintain the output DC voltage stable when the grid voltage fluctuates and the load changes temperature.

DC regulated power supply classification:
1. Chemical DC regulated power supply. The dry batteries, lead-acid batteries, nickel-cadmium, nickel-metal hydride, and lithium-ion batteries that we usually use belong to this category, each with its own advantages and disadvantages. With the development of science and technology, intelligent batteries have been produced; in terms of rechargeable battery materials, American developers have discovered an iodide of manganese, which can be used to make cheap, compact, and discharge time, and maintain performance after repeated charging. Good environmentally friendly rechargeable battery.

2. Linear DC power supply. A common feature of the stable power supply is that its power device adjustment tube operates in the linear region and stabilizes the output by adjusting the voltage drop between the tubes. It has the advantages of high stability, small ripple, high reliability, easy to make multiple channels, and continuous output adjustment.
3. Switching type DC regulated power supply. Its circuit types are mainly single-ended flyback, single-ended forward, half-bridge, push-pull and full-bridge. The fundamental difference between it and the linear power supply is that it does not work at the power frequency but works at tens of kilohertz to several megahertz. The function tube does not work in the saturation and cut-off area, that is, the switch state; it has the advantages of small size, light weight, stability and reliability.