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Magnetic induction current sensor for electric vehicle controller

A current sensor and electric vehicle technology, applied in voltage/current isolation, vehicle components, circuits or fluid pipelines, etc., can solve problems such as the influence of current detection accuracy, low production requirements, and brittle magnetic ring materials, making it difficult to purchase And cost reduction, solve the effect of magnetic permeability and linearity, good linearity

Inactive Publication Date: 2011-04-06
TIANJIN SANTROLL ELECTRIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of the magnetic ring material are very brittle, and the magnetic permeability is very low; after the magnetic gap of the magnetic ring is molded and customized, the size is fixed; the shock resistance is poor, and it is easy to be damaged during transportation and assembly
If an ordinary iron powder core or ferrite material with high magnetic permeability is used, a large magnetic gap needs to be opened, so that the linearity of the current sensor will decrease due to the edge effect of the magnetic flux, which will have a negative impact on the accuracy of current detection. greater impact
[0003] So far, there is no magnetic induction current sensor with lower material cost, lower production requirements, good shock resistance, convenient installation, easy adjustment, better linearity and higher precision in the market.

Method used

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  • Magnetic induction current sensor for electric vehicle controller
  • Magnetic induction current sensor for electric vehicle controller
  • Magnetic induction current sensor for electric vehicle controller

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0015] Such as Figure 1-4 : 1 is the magnetic ring segment, 2 is the magnetic gap, 3 is the external wire, and 4 is the magnetic sensor.

[0016] The present invention solves the above-mentioned technical problems by adopting the following scheme: the magnetic induction current sensor for the electric vehicle controller of the present invention is composed of a ferrite magnetic ring segment 1 and a magnetic sensor 4 to form a closed magnetic circuit, and the magnetic ring segment 1 is at least There are two, the magnetic sensor 4 is set in the magnetic gap 2 formed between the magnetic ring segments 1 , and the external wire 3 passes through the closed magnetic circuit formed by the magnetic ring segment 1 and the magnetic sensor 4 .

[0017] The technical solution of the present invention may also include: the cross section of the magnetic ri...

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Abstract

The invention relates to a magnetic induction current sensor for an electric vehicle controller, wherein a closed magnetic circuit is formed by a magnetic sensor, at least two magnetic ring sections are comprised, the magnetic sensor is arranged in a magnetic gap between the two magnetic ring sections, and an external lead wire passes through the closed magnetic circuit formed by the magnetic ring sections and the magnetic sensor. The invention provides the magnetic induction current sensor, which has the advantages of lower material cost, lower manufacturing requirements, better seismic resistance, better linearity and higher precision, and is more convenient to install and easier to regulate.

Description

Technical field: [0001] The invention relates to a current sensor, in particular to a magnetic induction current sensor used in an electric vehicle controller. Background technique: [0002] Currently, electric vehicles on the market use magnetic induction current sensors to measure large currents in wires, such as figure 1 Shown: The current of the measured wire passes through the magnetic ring with an opening, and the linear Hall chip is placed in the magnetic gap of the magnetic ring. The Hall chip requires that the magnetic induction generated by the magnetic ring varies with the measured current passing through the magnetic ring. Increase linearly, which requires the magnetic permeability of the magnetic ring to be very low, about ten times that of the air magnetic permeability, so the magnetic ring generally adopts a specially customized iron powder core material with a very low magnetic permeability. The characteristics of the magnetic ring material are very brittle,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/20B60R16/02
Inventor 孔昭松陈鹏曹广平
Owner TIANJIN SANTROLL ELECTRIC SCI & TECH
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