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Current sensor

A current sensor and resistor technology, applied in the field of sensors, can solve the problems of current sensor accuracy, linearity, temperature drift, etc., achieve the effects of small temperature changes, improve detection accuracy and linearity, and stabilize its own performance

Pending Publication Date: 2021-10-01
BYD SEMICON CO LTD
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Problems solved by technology

[0004] However, due to the shortcomings of the existing Hall element itself, it cannot meet the higher requirements for the accuracy, linearity, temperature drift and other parameters of current sensors in many fields.

Method used

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Embodiment Construction

[0042] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0043] In the present disclosure, the orientation words used such as "inner and outer" refer to "inner and outer" relative to the outline of the corresponding component itself, unless stated otherwise. In addition, the terms "first, second" and the like used in the present disclosure are for distinguishing one element from another element, and do not have sequence or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and shoul...

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Abstract

The invention relates to a current sensor, comprising an electromagnetic assembly (1), wherein the electromagnetic assembly (1) comprises a magnetic core (11) and a secondary coil (13), the secondary coil (13) winds around the magnetic core (11), the magnetic core (11) is configured to be annular and forms a cross-shaped air gap, the cross-shaped air gap comprises a longitudinal air gap (111) and a transverse air gap (112) perpendicular to each other, and the longitudinal air gap (111) extends in the radial direction of the magnetic core (11) to form a cut-off opening; and a circuit board assembly (2), wherein the circuit board assembly (2) comprises a magnetic sensitive element (23), the magnetic sensitive element (23) is located in the transverse air gap (112) and has an induction surface, and the induction surface is parallel to the direction of a magnetic field in the transverse air gap (112). Through the above technical scheme, the current sensor provided by the invention has higher detection precision, linearity and other parameters, and has the characteristic of low temperature drift.

Description

technical field [0001] The present disclosure relates to the technical field of sensors, and in particular, to a current sensor. Background technique [0002] A current sensor is a device that can sense the detected current and convert the detected current into a usable output signal, usually used for the detection of AC and DC currents. [0003] Among them, the existing current sensors are based on the Hall principle, and are mainly divided into open-loop Hall current sensors and closed-loop Hall current sensors. The Hall element senses the magnetic field around the measured current and converts it into an electrical signal, and After a series of processing circuits, the required analog signal is output to realize current detection. [0004] However, due to the shortcomings of the existing Hall element itself, it cannot meet the higher requirements for parameters such as accuracy, linearity, and temperature drift of current sensors in many fields. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 杨伟刘双高洪良
Owner BYD SEMICON CO LTD
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