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AC constant-current source of power amplifier

A technology of AC constant current source and power amplifier, which is applied in the direction of instruments, electric variable adjustment, control/regulation system, etc. It can solve the problems of poor reliability, low precision of steady current, low efficiency, etc.

Inactive Publication Date: 2019-12-31
中绿新材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an AC constant current source for a power amplifier. The purpose of the present invention is to solve the domestic shortcomings of low steady current accuracy, low efficiency, poor reliability, and large output ripple.

Method used

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Embodiment Construction

[0007] The present invention provides following technology and comprises following processing step:

[0008] An AC constant 1) voltage and current adjustment circuit for a power amplifier. The voltage adjustment module is mainly composed of a transformer and a DS1267 digital potentiometer. The maximum adjustable precision of a single DS1267 can reach 16 bits. It can be seen that the minimum single change is 1 / 512. For The 220V voltage can basically be regarded as a linear relationship, which is in line with the voltage regulation accuracy of the constant current source. The current regulation module is mainly composed of TDA2030 chip and high-power transistors 2SA1302 and 2SC3281. Among them, 2SA1302 and 2SC3281 form a push-pull power amplifier structure. 2) For the step-up transformer, the contact resistance of the circuit breaker contact is 15mΩ, so the power consumed on the load should be: P =I2R=1002×0.015=150W. The power consumption of the load is 150W. Considering the ...

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Abstract

The invention discloses an AC constant-current source of a power amplifier. The AC constant-current source comprises a main circuit, wherein the main circuit comprises a voltage and current adjustmentcircuit, a boost transformer, a current detection feedback circuit, an input control circuit and a display circuit, wherein each module is controlled by AT89C51. A digital potentiometer and an operational amplifier are used as pre-stage voltage control, and the effects of accuracy and high interference resistance can be achieved; and by combining the AT89C51, the combination of a logic judgment function of a singlechip microcomputer and a PID algorithm is achieved, the control is more flexible, and various requirements of the constant-current system are met very well.

Description

technical field [0001] The invention relates to a power amplifier in the voltage range, in particular to an AC constant current source of the power amplifier. Background technique [0002] In circuit breaker reliability equipment, the stability and accuracy of power supply is the basis for ensuring reliability. Otherwise, when the circuit breaker leaves the factory, due to the fluctuation of the power supply, the qualified products after verification may be judged as unqualified, and the unqualified products may be judged as qualified, which will seriously affect the quality of the product. The production of traditional constant current sources is to make use of the characteristics of diodes, triodes, and integrated voltage stabilizers to produce parametric current stabilizers, series feedback adjustment type constant current power supplies, switching constant current sources, etc., but there are often problems with small output current ranges and constant current There are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46
CPCG05F1/461
Inventor 詹浩
Owner 中绿新材料(江苏)有限公司