Numerical control constant current source device
A technology of constant current source and independent power supply, applied in the field of constant current source, can solve the problems of lack of stability and controllability of constant current source, and achieve the effect of broad market prospect and application value, constant current and simple circuit
Inactive Publication Date: 2017-06-16
江苏东方滤袋股份有限公司
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[0002] A constant current source is a power supply device that can provide constant current. With the development of technology, its use is becoming more and more extensive. An ideal constant current source should have the following characteristics: no change due to changes in load (output voltage); Changes due to changes in ambient temperature; the internal resistance is infinite (so that the current can flow out to the outside), and the constant current source circuit is due to the temperature performance of the load, the ripple size of the power supply, the adjustment control method and related control circuits Stability and other factors, the output will have different fluctuations in practical applications, and the existing constant current sources lack stability and controllability
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[0011] Below in conjunction with accompanying drawing, further illustrate the present invention.
[0012] Such as figure 1 The numerical control constant current source device shown includes single-chip microcomputer, ADC acquisition circuit, DAC control circuit, keyboard input circuit, liquid crystal display circuit, constant current source circuit, independent power supply; Input, output, the output end of the single-chip microcomputer is connected with the DAC control circuit, the output end of the DAC control circuit is connected with the constant current source circuit, the constant current source circuit is connected with the single-chip microcomputer feedback through the ADC acquisition circuit, the constant current source circuit is connected with the independent power supply and powered by it. The single-chip microcomputer adopts the single-chip microcomputer of the model PIC24HJ64GP504, the ADC acquisition circuit adopts the TLV2541 chip, and the DAC control circuit...
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The invention discloses a numerical control constant current source device. The numerical control constant current source device comprises a single chip microcomputer, an ADC acquisition circuit, a DAC control circuit, a keyboard input circuit, a liquid crystal display circuit, a constant current source circuit and an independent power supply; the keyboard input circuit and the liquid crystal display circuit are connected with the single chip microcomputer to be used for achieving input and output respectively, the output end of the single chip microcomputer is connected with the DAC control circuit, the output end of the DAC control circuit is connected with the constant current source circuit, the constant current source circuit is in feedback connection with the single chip microcomputer through the ADC acquisition circuit and in power supply connection with the independent power supply, and the independent power supply supplies power to the constant current source circuit. According to the numerical control constant current source device, the methods such as stable and reliable circuit and closed loop feedback and control are adopted, and therefore the output stability and controllability of the constant current source are improved.
Description
technical field [0001] The invention relates to a numerically controlled constant current source device, which belongs to the technical field of constant current sources. Background technique [0002] A constant current source is a power supply device that can provide constant current. With the development of technology, its use is becoming more and more extensive. An ideal constant current source should have the following characteristics: no change due to changes in load (output voltage); Changes due to changes in ambient temperature; the internal resistance is infinite (so that the current can flow out to the outside), and the constant current source circuit is due to the temperature performance of the load, the ripple size of the power supply, the adjustment control method and related control circuits Due to factors such as the stability of the constant current source, there will be different fluctuations in the output in practical applications, and the existing constant ...
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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 戴学树
Owner 江苏东方滤袋股份有限公司