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Open-loop current sensor

A sensor and ring current technology, applied in the field of sensors, can solve the problems of poor heat dissipation, the size of the wire constrained space, and temperature rise, and achieve the effects of simplifying the manufacturing process, improving the current detection range, and reducing the output delay

Pending Publication Date: 2020-06-30
赛卓电子科技(上海)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages are also obvious: 1) The packaged wires are limited by the size of the space and cannot pass large currents, which limits the detection range of the current sensor. Generally, it can only detect currents below 10 amperes; The high current causes the temperature in the body to rise, which is easy to cause damage to the Hall element and the processing circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] as attached Figure 1-4 A novel open loop current sensor is shown, comprising: a first printed circuit board module 1 comprising:

[0046] The first excitation wire 9 is connected to an external current source through a third pad 10 for passing current and generating a magnetic field around it;

[0047] The first storage space 12 is used to place the first sensing circuit module 7;

[0048] The first through-hole component 4, which is used for the electrical connection of the signal wire between the layers of the multilayer printed circuit board module;

[0049] The first pad component 5 is used for the electrical connection between the sensing circuit module and the printed circuit board module 7;

[0050] The second pad component 8 is used for electrical connection of wires such as power supply, ground and output signal with the outside;

[0051]An electrical connection is made between the pad component 4 and the first pad component 5 through the first signal wire ...

Embodiment 2

[0066] as attached Figure 5-8 Demonstrated a new type of current sensor consisting of:

[0067] The second printed circuit board module 13 includes:

[0068] The second excitation wire 20, which is connected to an external current source through the sixth pad assembly 21, is used to pass current and generate a magnetic field around it;

[0069] The second storage space 22 is used to place the second sensing circuit module 18;

[0070] The second through-hole component 15 is used for the electrical connection of the signal wire between the layers of the multilayer printed circuit board module;

[0071] The fourth pad component 16 is used for electrical connection between the sensing circuit module and the first printed circuit board module 13;

[0072] The fifth pad component 19 is used for electrical connection of wires such as power supply, ground and output signal with the outside;

[0073] The fourth pad component 16 and the fifth pad component 19 are electrically conn...

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Abstract

The invention provides an open-loop current sensor. The open-loop current sensor comprises a printed circuit board module, a sensing circuit module and an insulating packaging module; the printed circuit board module comprises an excitation wire and a storage space; the sensing circuit module is placed in the storage space; the printed circuit board module also comprises a signal interface; the sensing circuit module at least comprises a magnetic field sensing element; the printed circuit board module and the sensing circuit module are connected through the insulating packaging module; and thesensing circuit module is wrapped in the storage space by the insulating packaging module. The excitation wire is drawn on the printed circuit board, so the current bearing capacity exceeds 100 amperes, the current detection range is greatly improved, and adverse effects on the sensing circuit module due to overheating are not caused.

Description

technical field [0001] The present invention relates to the technical field of sensors, in particular to an open-loop current sensor. Background technique [0002] Current sensor, as the name suggests, is a device for detecting current, which can transform the detected current into an electrical signal that meets certain standards or other required forms of information output according to certain rules, so as to meet the needs of information transmission, processing, storage, and display. , recording and control requirements. The open-loop current sensor, as a detection device in the current sensor, is favored by manufacturers because of its advantages of simple structure, high reliability and strong overload capacity. At present, the open-loop current sensor adopts the Hall effect principle, and its structure includes: a magnetic core, an excitation wire passing through the magnetic core, a Hall element and a processing circuit. The magnetic core has an open air gap, and ...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R15/20G01R3/00
CPCG01R3/00G01R15/202G01R19/0092
Inventor 胡枭汪坚雄汪洋洋张超
Owner 赛卓电子科技(上海)股份有限公司