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An AC constant current source system

A technology of AC constant current source and DC bus, applied in control/regulation systems, conversion equipment without intermediate conversion to AC, conversion of DC power input to DC power output, etc., can solve the problem of insufficient design ability of low-voltage electrical products, low-voltage electrical Product function failure, affecting the performance of low-voltage electrical products, etc., to achieve the effect of compact structure, improve efficiency, and avoid connection and installation

Active Publication Date: 2020-02-18
镇江市产品质量监督检验中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the low-voltage electrical industry, low-voltage electrical product design capabilities are insufficient, and the production process lacks advanced technological equipment and necessary testing equipment. Production cannot be carried out strictly in accordance with technical specifications, parts and materials are changed at will, and inferior materials are used. Product structure and component selection have not taken effective measures, and the performance of low-voltage electrical products has frequently occurred, resulting in the failure or malfunction of low-voltage electrical products, and even causing major accidents and endangering personal safety.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038] The invention provides an AC constant current source system, such as Figure 1-3 As shown, it includes an AC / DC rectification module 1 , a DC / AC inverter module 2 , an energy conversion module 3 and a digital control module 6 .

[0039] The input end of the AC / DC rectification module 1 is connected to an AC power supply, and the input end of the AC / DC rectification module 1 is provided with a first voltage detection module 7 for detecting the input voltage; the input end of the DC / AC inverter module 2 is connected to The output end of the AC / DC rectification module 1 and the input end of the energy conversion module 3 are connected to the output end of the DC / AC inverter module 2, and the AC / DC rectification module 1 and the DC / AC inverter module 2 are rectified and reversed. The transformed power supply is input into the transduction module 3 for current conversion, and the output terminal of the transduction module 3 is used as the output terminal of the AC constant c...

Embodiment 2

[0047] On the basis of Example 1, as Figure 4 and 7 As shown, a buffer circuit 14 is provided at the input end of the AC / DC rectifier module 1, and the buffer circuit 14 includes a first inductor L1 connected in series to the first input phase of the three-phase AC power supply, and a first inductor L1 connected in series to the second input phase of the three-phase AC power supply. The second inductance L2 on the third input phase, the third inductance L3 in series on the third input phase, the first capacitor C1 in parallel between the first input phase and the second input phase, the parallel connection between the second input phase and the third input phase The second capacitor C2 between them and the third capacitor C3 connected in parallel between the third input phase and the first input phase, the first capacitor C1 to the third capacitor C3 are buffer capacitors, and the inductance in the buffer circuit 14 effectively suppresses the input power supply The capacitor...

Embodiment 3

[0051] On the basis of Example 2, such as Figure 6 and 7 As shown, an interleaved chopper circuit 16 is arranged between the DC buses at the output ends of the voltage stabilizing circuit 15, and the interleaved chopper circuit 16 includes an interleaved boost circuit, an interleaved step-down circuit and a fifth capacitor C5 arranged in parallel, so The interleaved boost circuit includes a first boost circuit and a second boost circuit arranged in parallel, the interleaved step-down circuit includes a first step-down circuit and a second step-down circuit arranged in parallel, and the fifth capacitor C5 is connected to between the DC buses at the output ends of the interleaving chopper circuit 16 .

[0052] The first boost circuit includes a fourth inductor L4, a fifth switching tube Q5, a fifth inductor L5, a second diode D2 and a sixth switching tube Q6, the fourth inductor L4, the fifth switching tube Q5 and The second diode D2 is serially connected to the positive end ...

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Abstract

The invention discloses an AC constant current source system, comprising: an AC / DC rectification module, a DC / AC inverter module, an energy conversion module, a current detection module, a voltage detection module, and a digital control module. The digital control module is based on the AC / DC The port voltage of the rectifier module, the port voltage and output current of the transducer module control the DC / AC inverter module, and the high-voltage and low-current power output by the DC / AC inverter module is converted into a low-voltage and high-current power supply by the transducer module. The module outputs AC constant current. The invention adjusts the output current of the transducer module through the error control method, keeps the output AC current consistent with the target current amplitude, frequency and phase, and the system has a short operating cycle, precise control, strong real-time performance, good reliability and high efficiency, and the AC constant The current source is multi-level adjustable, suitable for various occasions such as low-voltage electrical appliance testing and other AC constant current source power supply.

Description

technical field [0001] The present invention relates to the technical field of AC constant current source, more specifically, the present invention relates to an AC constant current source system. Background technique [0002] Low-voltage electrical products are devices or components that play the roles of switching, control, protection, detection, indication and alarm in low-voltage power distribution systems and control systems. It is the basis and important guarantee for the reliable operation of power systems. [0003] With the rapid development of the low-voltage electrical industry, low-voltage electrical product design capabilities are insufficient, and the production process lacks advanced technological equipment and necessary testing equipment. Production cannot be carried out strictly in accordance with technical specifications, parts and materials are changed at will, and inferior materials are used. Product structure and component selection have not taken effecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/42H02M1/34H02M3/07H02M3/155
CPCH02M1/34H02M3/07H02M3/155H02M5/42H02M1/0012H02M1/007
Inventor 丁志东陈坤华张钰孙平辉
Owner 镇江市产品质量监督检验中心
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