The working principle of linear power supply!

The working process of the main loop of the linear power supply is that the input power is firstly subjected to pre-stabilization circuit for preliminary AC voltage stabilization, and then converted to DC power by the main working transformer isolation rectification, and then controlled by the control circuit and the single-chip microprocessor controller The linear adjustment element performs fine adjustment to make it output a high-precision DC voltage source,
1. Power transformer and rectification: transform the 380V AC into the required DC;
2. Pre-regulation circuit: use relay components or thyristor components to pre-adjust and pre-regulate the input AC or DC voltage, thereby reducing the power consumption of linear adjustment components and improving work efficiency. And ensuring the high accuracy of the 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: to prevent and absorb the pulsation wave, interference and noise of the DC power supply to the maximum extent, so as to ensure that the output voltage of the DC power supply has low ripple, low noise and low interference;
5. Single-chip microcomputer control system: the single-chip micro-processing controller compares, judges, calculates and analyzes the various signals detected, and then sends out corresponding control instructions 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 a high-precision reference voltage source and power supply required for the work of electronic circuits for the DC voltage stabilization system;
7. Voltage sampling and voltage regulation: detect the output voltage value of the DC stabilized power supply and set the output voltage value of the regulated DC stabilized power supply;

8. Comparison and amplifying circuit: compare the output voltage value of the DC stabilized power supply with the voltage of the reference source to obtain the error voltage signal, then amplify the feedback and control the linear adjustment component to ensure the stability of the output voltage;
9. Current detection circuit: Obtain the output current value of the DC stabilized power supply for current limiting or protection control information;
10. Drive circuit: a power amplifier circuit provided for driving executable components;
11. Display: display of output voltage value and output current value of DC stabilized power supply.