Current source based on zero flux current closed loop feedback

A technology of current source and zero magnetic flux, applied in the field of power supply, can solve the problem that the stability and accuracy of high-power current source cannot meet the calibration requirements of batch DCCT accuracy, so as to ensure output accuracy, simple control method and ensure accuracy Effect

Active Publication Date: 2019-10-11
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0003] In view of the above analysis, the present invention aims to provide a current source based on zero-flux current closed-loop feedback to solve the problem that the stability and accuracy of existing high-power current sources cannot meet the calibration requirements of batch DCCT accuracy

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  • Current source based on zero flux current closed loop feedback
  • Current source based on zero flux current closed loop feedback
  • Current source based on zero flux current closed loop feedback

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Embodiment Construction

[0036] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0037] This embodiment discloses a current source based on zero-flux current closed-loop feedback, which is used to generate high-power adjustable high-precision direct current. It can be used for DCCT calibration with a range of DCCT within 400A, and the accuracy after calibration is better than 20ppm.

[0038] Such as figure 1 As shown, the current source includes an input circuit, a regulation circuit, an output circuit and a ring core;

[0039] The input loop includes a current reference source and a first coil; the first coil is wound on the annular magnetic core and connected to the current reference source to form an input loop. Driven by the in...

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Abstract

The invention relates to a current source based on zero flux current closed loop feedback, and belongs to the technical field of power sources, solving the problem that the stability and accuracy of the existing high-power current source cannot meet requirements. The power source comprises an input loop, an adjustment loop, an output loop and an annular magnetic core; magnetic flow in the annularmagnetic core is adjusted via the adjustment loop, so that the input magnetic flow generated by the input loop and the feedback magnetic flow generated by the output loop are balanced, the current ofthe output loop is kept constant, and the size of the output current in the output loop can be controlled through controlling the number of ampere turns in the input loop. According to the current source provided by the invention, the current adjustment control method is relatively simple, the high-power current accuracy can be ensured, and the output accuracy of the power source is improved.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a current source based on zero-flux current closed-loop feedback. Background technique [0002] With the construction of accelerators, the demand for calibration technology for batch DC current sensor (Direct Current-Current Transformer, DCCT) accuracy is also becoming more and more obvious. At present, only the standard current output by the mA-level current source can reach the stability of the ppm level (parts per million, usually indicating the relative size of the error, the smaller the ppm value, the smaller the error and the higher the accuracy) and accuracy; and for DCCT, usually the detection standard current should be at least 100 A level, so at least a high-precision 100 A level standard current is required to calibrate it. For a high-power current source, since it requires a sensor as a sampling element, and the entire system requires extremely high temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/565
CPCG05F1/565
Inventor 韩超龙锋利郜垚陈素颖
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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