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Single-power-supply non-isolated adjustable constant-current source

A non-isolated, single power supply technology, applied in the field of constant current sources, can solve the problems of wasting energy and increasing costs, and achieve the effects of reducing costs, solving high costs, and stabilizing output voltage

Inactive Publication Date: 2012-08-01
AEROSPACE HI TECH HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing current source adopts the isolated output mode of the isolated power supply, the cost is increased and energy is wasted due to the use of multiple power supplies, thereby providing a non-isolated adjustable constant current source with a single power supply

Method used

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specific Embodiment approach 1

[0008] Specific implementation mode 1. Combination figure 1 Shown specifically illustrates this embodiment. The single power supply non-isolated adjustable constant current source described in this embodiment includes an adjustment unit 1, a power module 2, a central processing unit 3, a D / A conversion unit 4, and a voltage stabilizing circuit 5. Sampling unit 6, feedback unit 7 and output unit 8,

[0009] The adjustment unit 1 is used to output an adjustable voltage signal, the adjustment unit 1 outputs the voltage signal to the power module 2, the power module 2 outputs the corresponding voltage signal to the central processing unit 3, and the central processing unit 3 processes the voltage signal to obtain a digital voltage signal , and send the digital voltage signal to the D / A conversion unit 4, the D / A conversion unit 4 outputs the analog voltage signal to the voltage stabilizing circuit 5, the voltage stabilizing circuit 5 outputs the regulated voltage signal to the sam...

specific Embodiment approach 2

[0012] Embodiment 2. The difference between this embodiment and the single power supply non-isolated adjustable constant current source described in Embodiment 1 is that it also includes a display unit 9, and the display data input end of the display unit 9 is connected to the central processing unit 3 The display data output terminal is used to display the current output current value.

[0013] The voltage is collected by the sampling unit, the current value is calculated by the central processing unit, and the current current value is displayed on the display unit. The output current can be displayed intuitively through the display module.

specific Embodiment approach 3

[0014] Embodiment 3. The difference between this embodiment and the single-power non-isolated adjustable constant current source described in Embodiment 1 is that the central processing unit 3 is a 51 single-chip microcomputer.

[0015] The working principle of the present invention is: the output voltage can be changed by selecting the input voltage value through the adjustment unit, and the central processing unit corresponds to an output digital signal according to the voltage value, and transmits it to the digital-to-analog conversion chip to convert it into a voltage value, which is output and controlled by the stabilizing circuit To output the current signal, a feedback resistor is connected in series at the output current signal terminal. The feedback resistor is a sampling unit, and is transmitted to the central processing unit through the voltage processing of the feedback resistance. The central processing unit captures the The voltage at the feedback terminal changes...

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Abstract

The invention relates to a single-power-supply non-isolated adjustable constant-current source, which is used for solving the problems of increase in cost and waste of energy due to the adoption of a plurality of power supplies in an isolated output way in which an isolated power supply is adopted in the conventional current source. An input voltage value is selected through an adjusting unit, so that an output voltage can be changed; a central processor is used for outputting a digital signal according to a voltage value, and transmitting to a digital to analog conversion chip for converting into a voltage value; stabilizing circuit output is used for controlling an output current signal; an output current signal end is connected in series with a feedback resistor; the feedback resistor is a sampling unit; voltage processing of the feedback resistor is transmitted to a central processor, so that voltage change of a feedback end is captured by using the central processor under the condition that the voltage of an adjusting end is not changed; and a digital value output by the digital to analog conversion chip is adjusted, and an output voltage is adjusted, so that output current is constant. The single-power-supply non-isolated adjustable constant-current source is suitable for the fields of electronics, automation and the like.

Description

technical field [0001] The invention relates to a constant current source, in particular to a single power supply non-isolated adjustable constant current source. Background technique [0002] The application of constant current source is very wide, but generally the manufacturing process is complicated, which results in high cost. In many cases, the isolated power supply is used in the form of isolated ground. The existing current source adopts the isolated output mode of isolated power supply. Multiple power supplies increase costs and waste energy. Contents of the invention [0003] In order to solve the problem that the existing current source adopts the isolated output mode of the isolated power supply, the cost is increased and energy is wasted due to the use of multiple power supplies, thereby providing a non-isolated adjustable constant current source with a single power supply. [0004] The single power supply non-isolated adjustable constant current source of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
Inventor 胡伟王洋李春龙陈浩刘伟
Owner AEROSPACE HI TECH HLDG GROUP
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