Current sensor

A current sensor and electrical connection technology, which is applied in voltage/current isolation, instruments, and measurement of electrical variables, etc., can solve the problems of sensor magnetic circuit influence, measurement accuracy, and silicon steel sheet magnetic permeability, etc., to achieve convenient assembly and guarantee The effect of measurement accuracy

Inactive Publication Date: 2020-05-29
LEADRIVE TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typical grounding methods include magnetic core welding conductors, magnetic core slotted riveting conductors, magnetic core perforated crimping conductors, etc. However, these grounding methods will affect the magnetic permeability of the silicon steel sheet, and thus affect the magnetic circuit of the sensor , thus affecting the measurement accuracy

Method used

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Embodiment Construction

[0017] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Such as Figure 1~3 As shown, the current sensor of the present invention includes a magnetic core 10, a Hall chip 30, a printed circuit board 20 and a crimping shrapnel 40, the magnetic core 10 is provided with an air gap 11, and the Hall chip 30 is placed in the In the air gap 11, the Hall chip 30 is welded and fixed on the printed circuit board 20, and the printed circuit board 20 is used to provide power to the Hall chip 30 and to output the power of the Hall chip 30. Measure the signal. The power of the Hall chip 30 is provided by an external power source through the printed circuit board 20 , and the output voltage of the Hall chip 30 is fed back to the external signal receiving circuit through the printed circuit board 20 .

[0019] The printed circuit board 20 is provided with a grounding terminal (not shown in the figure), and ...

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Abstract

The invention discloses a current sensor which comprises a magnetic core, a Hall chip, a printed circuit board and a crimping elastic sheet. The magnetic core is provided with an air gap, the Hall chip is arranged in the air gap, and the Hall chip is welded and fixed on the printed circuit board; a grounding terminal is arranged on the printed circuit board, the crimping elastic sheet is arrangedbetween the magnetic core and the printed circuit board and is respectively connected with the magnetic core and the printed circuit board, and the crimping elastic sheet is electrically connected with the grounding terminal. According to the current sensor, effective grounding of the magnetic core is realized, the measurement precision is ensured and the current sensor is convenient to assemble.

Description

technical field [0001] The invention relates to the technical field of current detection, in particular to a current sensor. Background technique [0002] With the development of power electronics technology, the power level and voltage and current level of new energy vehicle motor controllers are gradually increasing. In new energy vehicle motor controllers, current measurement and control, as a key function, not only put forward higher requirements for the consistency and reliability of the current sensor, but also require the current sensor to maintain a higher measurement in a wider temperature range precision. [0003] The Hall current sensor can realize the isolation of the primary current and the test circuit, and has the advantages of wide measurement range, high precision, good linearity, short response time, strong overload capacity, etc., and is widely used in motor controllers. The Hall current sensor is mainly composed of a Hall chip, a magnetic core with an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/20
CPCG01R15/202
Inventor 董耀文史经奎任康乐
Owner LEADRIVE TECH (SHANGHAI) CO LTD
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