Numerical-control direct-current power source

A DC power supply and circuit technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of low intelligence, complex structure, unfavorable maintenance and maintenance, etc.

Active Publication Date: 2013-07-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the process of realizing the present invention, the applicant found that the existing numerical control power supply has the following technical defects: its intelligenc

Method used

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  • Numerical-control direct-current power source
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  • Numerical-control direct-current power source

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. While illustrations of parameters including particular values ​​may be provided herein, it should be understood that parameters need not be exactly equal to the corresponding values, but rather may approximate the values ​​within acceptable error margins or design constraints.

[0023] The present invention proposes a digitally controlled voltage / current source system. The parameters and operations of the power supply are all set in the control interface on the PC. The control chip of the power supply controls other parts of the circuit to work together according to the settings to obtain a power supply that meets the requirements. . It should be noted that the present invention takes a PC and a programmable logic chip FPGA...

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Abstract

The invention discloses a numerical-control direct-current power source. Reference voltage is provided by a D/A (digital to analog) module, and is outputted by a power operational amplifying module, the output is sampled and fed back to the input end of the power operational amplifying module for closed loop control, the outputted voltage can range from several millivolts to several dozens of volts, the current can range from several milliamperes to several amperes, the accuracy can reach 1 per mill, and the bidirectional voltage output and the bidirectional current output can be realized without an output polar reversing circuit. In addition, the numerical-control direct-current power source also has an overvoltage/overcurrent protection function and an outputted voltage and current measuring and displaying function.

Description

technical field [0001] The invention relates to the technical field of power supplies in the electronic information industry, in particular to a digitally controlled DC power supply that uses digital signal input to control output. Background technique [0002] The voltage and current source is one of the key designs in the development of many instruments and equipment. The error generated when the power supply is working will affect the accuracy of the entire system, and the use of the power supply will cause many adverse consequences. [0003] There are many varieties of ordinary DC regulated power supplies, but they all have the following problems: ①The output voltage or current is adjusted by coarse adjustment (band switch) and fine adjustment (potentiometer). In this way, when the output voltage or current needs to be accurately output, or needs to be changed in a small range (such as 1.01-1.02V or 1.01-1.02mA), the difficulty is greater. In addition, as the use time i...

Claims

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Application Information

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IPC IPC(8): G05F1/46
Inventor 徐春雨杨海钢胡凯曾宪理王德利
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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