Digital direct tuning DC voltage stabilizing and regulating power source

Abstract

The invention discloses a digital direct regulation direct current voltage stabilizing and regulating power supply. The digital direct regulation direct current voltage stabilizing and regulating power supply is a PWM switch power supply and controlled by a single chip microcomputer, and central voltage digital quantity is taken as a voltage stabilizing and regulating comparison reference. A main control signal is a high-frequency pulse signal with the peak analog-digital conversion and the gradual pulse instantaneous control. The digital direct regulation direct current voltage stabilizing and regulating power supply comprises a plurality of high-frequency controllable rectifier circuits, the output voltage is gradually decreased by the same rate, the gating is decided by the output voltage, the main control signal is taken out from the endpoint of a rectifier coil with the maximum number of turns, and the control precision is ensured by using large file size to simulate the control of small file size. A secondary control signal is taken out from the direct current of an output end, the timely inspection of A / D is carried out, the output voltage is compared with the central voltage, and the difference of the output voltage and the central voltage is used for determining the frequency of a micro-movement switch and slightly changing pulse duty cycle to further correct the systematic errors. The power supply has small size, light weight, great power, high efficiency, stable voltage, small ripple, high quality, integrated stabilization and regulation and arbitrary regulation within a wide range and at the different places, thereby being the ideal power supply in the digital information age.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a digital direct-current stabilized voltage-regulated power supply controlled by a single-chip microcomputer. Background technique [0002] With the development of science and technology, the requirements for power supply are getting higher and higher. At present, there are known linear DC regulated power supplies and switching DC regulated power supplies. The linear DC regulated power supply uses a power frequency transformer to step down, power frequency rectification and filtering, and then adjust the output voltage with a regulator tube. Its output voltage always follows the reference voltage and has little to do with circuit control, so the output voltage is stable, the ripple is small, and the quality is high. However, its voltage adjustment tube works in the linear region and flows the same current as the load. The greater the adjusted voltage, the greater the ...

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Problems solved by technology

But its control signal is taken from the rear side of high-frequency rectification and filtering. Because the detection is in the front and the control is in the back, the abnormal voltage can only return to normal after a period of time (depending on the filter time constant), and the output voltage has relatively large ripples. Both power supplies have imperfections

In addition, regardless of the kind of regulated power supply, they still have a common problem, that is, they all rely on a reference voltage component, and use its voltage analog as a comparison reference for voltage regulation and regulation. It not only limits the voltage regulation range of the power supply, In addition, the voltage adjustment must be manually pasted to the machine, and the purpose of voltage adjustment can only be achieved by changing the size of the voltage dividing resistor. This is for occasions that require remote voltage adjustment (for example, when the moon probe satellite cannot get sunlight, it needs to lower part of the voltage to make it sleep) , is undoubtedly a big flaw

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