High-stability DC large current source

A high-current, constant-current source technology, applied in the direction of measuring electricity, measuring electrical variables, and components of electrical measuring instruments, can solve problems such as difficult to achieve high stability and precision, and reduce voltage references and sampling devices Affect, improve output stability, effect of improving stability

Active Publication Date: 2016-04-27
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the current of a general DC current source is large, it is difficult to achieve high stability and precision due to many factors such as sampling and heat dissipation. large power supply

Method used

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  • High-stability DC large current source
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  • High-stability DC large current source

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Embodiment Construction

[0015] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0016] see figure 1 , the structure diagram of the high-stability DC high-current source of the present invention, including adjustment tube, sampling circuit, current sampling resistor, reference voltage, amplifier and auxiliary power supply, load, power control and other main modules. Among them, the output current is converted into a voltage through the sampling resistor, and then compared with the amplified reference voltage, the compared error is adjusted by the adjustment tube to adjust the output current, and finally the output current is adjusted to the set value and remains unchanged. The power control module and the load dynamic adjustment circuit can dynamically adjust the tube pressure drop on the adjustment tube according to the load...

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Abstract

The invention provides a DC large current source which comprises a regulation tube, a sampling circuit, a current sampling resistor, a reference voltage, an amplifier, an auxiliary power supply and a load. The DC large current source is characterized by that the DC large current source also comprises a power control module, the tube voltage drop in the regulation tube is adjusted according to a load condition, the voltage drop is reduced when the load is small, and the regulation tube working voltage is gradually increased when the load resistance is large.

Description

technical field [0001] The technology described in this disclosure generally relates to the field of rechargeable battery technology. Background technique [0002] Many fields use DC current sources and have very high requirements for the stability of DC current sources, such as satellite zero magnetic test system, electrical measurement, etc. In the satellite zero magnetic test, the stability of the DC current source directly affects the performance of the test system. In the electrical measurement process using the DC current source, the stability of the applied DC current source directly affects the measurement results. Therefore, it is necessary to develop a DC current source with high stability. When the current of a general direct current source is large, it is difficult to achieve high stability and precision due to many factors such as sampling and heat dissipation. Great power. Contents of the invention [0003] The purpose of the present invention is to propos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 王书强宋佳赟潘攀刘碧野
Owner BEIJING DONGFANG MEASUREMENT & TEST INST
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