The basic working principle of linear power supply

   The working process of the main circuit of the linear power supply is that the input power supply is firstly AC-regulated by the pre-regulation circuit, and then converted into a DC power supply by the main working transformer isolation and rectification, and then under the intelligent control of the control circuit and the single-chip microprocessor controller. The linear adjustment component is finely adjusted to output a high precision DC voltage source.

    1. Power transformer and rectification: convert 380V AC into the 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 maximum extent, thus ensuring 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 voltage value 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 the error voltage signal, performing amplification feedback and controlling the linear adjusting component to ensure the output voltage is stable.