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1. Principle of DC stabilized power supply-introduction

　　 DC stabilized power supply is an electronic device that can provide stable DC power to the load. Most of the power supply of the DC stabilized power supply is an AC power supply. When the voltage of the AC power supply or the load resistance changes, the DC output voltage of the voltage stabilizer will remain stable. With the development of electronic equipment in the direction of high precision, high stability and high reliability, DC stabilized power supply puts forward high requirements on the power supply of electronic equipment.

2. Principle of DC stabilized power supply

　　 DC stabilized power supply is a device that converts 220V power frequency AC power into a regulated output DC voltage. It needs four steps of voltage transformation, rectification, filtering, and voltage stabilization to complete. The working principles of the four links are as follows:

　　(1) Power transformer: It is a step-down transformer, which converts the 220V AC voltage of the grid into an AC voltage that meets the needs and sends it to the rectifier circuit. The transformation ratio of the transformer is determined by the secondary voltage of the transformer.

　　 (2) Rectifier filter circuit: The rectifier circuit transforms the AC voltage Ui into a pulsating DC voltage. Then filter the larger ripple component through the filter circuit, and output the DC voltage U1 with smaller ripple.

　　(3) Filter circuit: It can filter out most of the AC components in the output voltage of the rectifier circuit to obtain a relatively smooth DC voltage. Each filter capacitor C satisfies RL-C=(3~5)T/2,

　　(4) Voltage stabilizing circuit: The function of the stabilizing circuit is to stabilize the output DC voltage, which does not change with the change of AC grid voltage and load.

3. Principle of DC stabilized power supply-application

　　 DC stabilized power supply can be widely used in national defense, scientific research, universities, laboratories, industrial and mining enterprises, electrolysis, electroplating, DC motors, charging equipment, etc. In addition, it can also be applied to:

(1) It can be used for aging of various electronic equipment, such as PCB board aging, home appliance aging, various IT products aging, CCFL aging, lamp aging;

(2) It is suitable for the aging and testing of electronic components that need to be automatically turned on and off, and the number of cycles is automatically counted; (3) Electrolytic capacitor pulse aging;

(4) Experienced testing of resistors, relays, motors, etc.;

(5) The whole machine is sophisticated; the performance test of electronic components and routine tests.