NC (numerical control) adjustable power supply with low cost

Abstract

An NC (numerical control) adjustable power supply with low cost is widely applied to the fields of education, scientific research, electroplating, national defense, laboratories and the like, comprises a voltage control circuit, a current control circuit, a PWM (pulse-width modulation) generation circuit and a step-down type switching power supply circuit, and is structurally characterized in that an output end of a single chip microcomputer is connected with an input end of the current control circuit and an input end of the voltage control circuit, and a switching power supply is connected with the PWM generation circuit and controls the PWM generation circuit; an output end of the current control circuit and an output end of the voltage control circuit are further communicated with the PWM generation circuit, then an output end of the PWM generation circuit is connected with the step-down type switching power supply circuit, and finally, output voltage and current signals are fed back to the current control circuit and the voltage control circuit by the step-down type switching power supply circuit.

Description

technical field [0001] The invention is an improved technology of a direct current power supply, which is widely used in the fields of teaching, scientific research, electroplating, national defense, laboratories and the like, and in particular relates to a low-cost numerical control adjustable power supply. Background technique [0002] With the continuous improvement of the performance of the power supply, the requirements for the power supply are also getting higher and higher. In addition to electrical performance indicators, the quality of a power supply also has many other indicators, such as ambient temperature, external dimensions, EMI requirements, seismic requirements, reliability indicators, integration and aesthetics. All these indicators determine the market competition index rate of a power supply product. [0003] The research of some power electronic components, the research of power integration technology, the research of new raw materials and components al...

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the above problems, makes up for the deficiencies of the prior art, and provides a low-cost, easy-to-debug numerically controlled adjustable power supply based on a switching power supply scheme using extremely low-cost devices LM2575 and LM324, which solves the problem of traditional numerically controlled Adjustable switching power supply has problems such as high cost and difficult debugging, which can meet the needs of general industrial testing and laboratory applications

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