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Copper bar current sensor

A current sensor and sensor technology, applied in the direction of only measuring current, voltage/current isolation, measuring current/voltage, etc., can solve the problem of low current detection accuracy, and achieve the solution of low detection accuracy, improve accuracy, and position optimization. Effect

Pending Publication Date: 2020-09-22
NING BO SINOMAGS ELECTRONICS TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a copper bar current sensor to solve the problem of low current detection accuracy due to the high-frequency adhesion effect of the copper bar in the prior art

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0040]The inventors found that the current sensor using the magnetic sensor chip usually adopts the ring array scheme, and its volume is relatively large, and due to the adhesion effect of the copper bar, the high-frequency frequency characteristics of the existing copper bar current detection are poor, which leads to The detection accuracy is low.

[0041] ...

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Abstract

The invention relates to the technical field of current sensors, in particular to a copper bar current sensor, which comprises a first group of magnetic sensing chips distributed in a first side of acopper bar to be measured; a second group of magnetic sensing chips distributed in the second side of the copper bar to be detected; and a programmable gain amplifier which comprises a non-inverting input end and an inverting input end. The second side is opposite to the first side, the second group of magnetic sensing chips and the first group of magnetic sensing chips comprise the same number ofmagnetic sensing chips, and each magnetic sensing chip comprises a first voltage end and a second voltage end; the first voltage ends of the first group of magnetic sensing chips are connected to thenon-inverting input end, and the second voltage ends of the first group of magnetic sensing chips is connected to the inverting input end; the first voltage ends of the second group of magnetic sensing chips are connected to the inverting input end, and the second voltage ends of the second group of magnetic sensing chips are connected to the non-inverting input end. The copper bar current sensorprovided by the invention is compact in structure and has a good frequency response characteristic.

Description

technical field [0001] The invention relates to the technical field of current sensors, in particular to a copper bar current sensor. Background technique [0002] In recent years, power electronic systems such as new energy vehicles, photovoltaic power stations, communication base stations, and energy storage are gradually developing towards modularization, integration, high power density, and small size. Due to its small size and strong current flow capacity, copper bars meet the development needs of power electronic systems. [0003] Traditional current sensors usually use an iron core, or a ring array composed of multiple Hall elements as a copper bar current detection solution. On the other hand, a current sensor that uses a ring-shaped magnetic sensor chip to detect the current of the copper bar has also appeared. For example, a current measuring device disclosed in Chinese patent application CN109374940A, however, the inventor found that the existing copper bar curr...

Claims

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Application Information

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IPC IPC(8): G01R15/20G01R19/00G01R1/04G01R1/30
CPCG01R1/04G01R1/30G01R15/205G01R19/0092
Inventor 王建国白建民徐晓鹏诸敏谈侃
Owner NING BO SINOMAGS ELECTRONICS TECH CO LTD