CN212723054U

CN212723054U - Anti-interference Hall current sensor for vehicle

Info

Publication number: CN212723054U
Application number: CN202021136323.0U
Authority: CN
Inventors: 王玮亮; 陈婷; 刘冠仲; 邹丽君
Original assignee: NANJING ZHONGXU ELECTRONICS SCIENCE AND TECHNOLOGY CO LTD
Current assignee: NANJING ZHONGXU ELECTRONICS SCIENCE AND TECHNOLOGY CO LTD
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-16
Anticipated expiration: 2030-06-18

Abstract

An anti-interference Hall current sensor for a vehicle comprises a Hall sensor, a magnetic ring core, a signal amplifying circuit, a magnetic ring core shell and a lead-out wire; the magnetic ring core is a circular magnetic core, a gap is arranged on the circular ring, and a Hall sensor is arranged at the gap; a lead of the current to be measured penetrates through the ring; the hall sensor senses a magnetic field signal. The inner diameter of the circular magnetic core is 10-25 mm and is made of a Permalloy material. And concentrating a magnetic field generated by conducting current and blocking an interference magnetic field by adopting a permalloy magnetic ring core to obtain the anti-interference Hall current sensor. The practical application effect is good. The Hall sensor is not influenced by external interference, and signals output by the Hall sensor do not have interference peaks.

Description

Anti-interference Hall current sensor for vehicle

Technical Field

The utility model relates to a hall current sensor for detect current signal and change, especially an automobile-used anti-interference hall current sensor.

Background

A hall current sensor is a device for detecting current that is made using the hall effect principle. The Hall current sensor is a magnetic-sensing sensor utilizing the Hall effect principle, has the outstanding characteristics of capability of measuring current signals (deriving current values by measuring magnetic field intensity) under the conditions of non-contact and electric isolation, has the characteristics of high precision, low power consumption, firm structure, small volume, light weight, long service life and the like, and is vibration-resistant and not afraid of pollution or corrosion of dust, oil stain, water vapor, salt mist and the like.

The Hall current sensor is applied to current control of an automobile power management system. The working principle is that the Hall effect is utilized to convert the input current of the frequency converter and the time of the change of the working state into electric quantity for detection and control. The Hall current sensor outputs signals and has the advantages of no contact, no abrasion, clear output waveform, no jitter, no rebound and the like. When the magnetic field intensity of the input current changes, the output of the sensor changes accordingly. The existing Hall current sensor does not emphasize anti-interference, but the current detection of the automobile power supply needs the automobile Hall current sensor, and the anti-interference problem is a problem which needs to be solved in application. Because of the severe electromagnetic interference of units on the automobile due to ignition and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automobile-used anti-interference hall current sensor for automobile power supply's current detection, because the current vehicle-mounted inside security requires, need design out hall current sensor far away with control end interval of a section measuring terminal. The measuring end of the current sensor of the model is 45mm away from the output end.

The technical scheme of the utility model is that an anti-interference Hall current sensor for vehicle comprises a Hall sensor H, a magnetic ring core 1, a signal amplifying circuit 2, a magnetic ring core shell 3 and an outgoing line H1; the magnetic ring core is a circular magnetic core, a gap is arranged on the circular ring, and a Hall sensor H is arranged at the gap; a lead of the current to be measured penetrates through the ring; the sensor is small in size and large in current range by adopting an integrated scheme in structural design, a magnetic field generated by current gathered by the magnetic ring core is used, and a magnetic field signal is induced by the Hall element.

The inner diameter of the circular magnetic core is 10-25 mm and is made of a Permalloy material. The permalloy circular magnetic core induces the magnetic field generated by the current passing through the circular magnetic core to the Hall current sensor, and the permalloy magnetic conduction and magnetic isolation effect are added to obtain the anti-interference Hall current sensor.

Has the advantages that: and concentrating a magnetic field generated by conducting current and blocking an interference magnetic field by adopting a permalloy magnetic ring core to obtain the anti-interference Hall current sensor. The practical application effect is good. The Hall sensor is not influenced by external interference, and signals output by the Hall sensor do not have interference peaks.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a partial circuit diagram of FIG. 1;

fig. 3 is a schematic structural diagram of the hall sensor.

Detailed Description

As shown in the figure, hall current sensor includes the magnetic ring core as electromagnetic conversion device, and magnetoelectric conversion is hall sensor, and hall sensor is partial such as signal output behind the signal amplification circuit, and the schematic diagram is seen in fig. 1, and circuit design is seen in fig. 2:

schematic scheme diagram: in the schematic diagram of fig. 1, the scheme adopts the working principle of a hall direct-type current sensor; the line consists of three parts: the first part is a magnetic ring core and a Hall element, and a magnetic field generated by each phase of current on board is gathered by the magnetic ring core; in the second part, a magnetic field signal generated by detecting current by a Hall element passes through (the Hall sensor senses the magnetic field signal and is output by an operational amplifier), particularly a differential amplification circuit, and an anti-interference circuit can be added; the third part is signal output.

The magnetic ring comprises a Hall sensor H, a magnetic ring core 1, a signal amplifying circuit 2, a magnetic ring core shell 3 and an outgoing line H1; the sensor is small in size and large in current range by adopting an integrated scheme in structural design, a magnetic field generated by current gathered by the magnetic ring core is used, and a magnetic field signal is induced by the Hall element.

The sensor overall housing design is shown in fig. 3.

Claims

1. An anti-interference Hall current sensor for a vehicle is characterized by comprising a Hall sensor, a magnetic ring core, a signal amplification circuit, a magnetic ring core shell and a lead-out wire; the magnetic ring core is a circular magnetic core, a gap is arranged on the circular ring, and a Hall sensor is arranged at the gap; a lead of the current to be measured penetrates through the ring; the hall sensor senses a magnetic field signal.

2. The automotive anti-interference Hall current sensor according to claim 1, wherein the inner diameter of the circular magnetic core is 10-25 mm and is made of a Permalloy material.

3. The automotive anti-jamming hall current sensor according to claim 1, wherein the hall sensor sensing magnetic field signal is amplified and output by a differential amplifier.