Device for expanding detection range of current sensor

A technology of current sensor and detection quantity, applied in the direction of measuring device, only measuring current, measuring electric variable, etc., to achieve the effect of reducing circuit cost and volume, volume and cost reduction

Pending Publication Date: 2021-05-07
HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a device for expanding the detection range of a current sensor, the purpose of which is to solve the problem of high circuit cost, Disadvantages of large size

Method used

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  • Device for expanding detection range of current sensor
  • Device for expanding detection range of current sensor

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0023] In the description of the present invention, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense unless otherwise clearly specified and limited. Disconnected connection, or integrated; may be mechanically connected, may also be electrically connected; may be directly connected, may also be indirectly connected through an intermedi...

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Abstract

The invention discloses a device for expanding the detection range of a current sensor. The device comprises a detection module and a bypass shunting module, the input ends of the detection module and the bypass shunting module are respectively connected with the output end of the power supply, and the output ends of the detection module and the bypass shunting module are respectively connected with the load module; the bypass shunting module is a copper laying plane on a PCB, the copper laying plane and a current detection pin of the detection module are arranged in parallel, power supply current flowing from a power supply to the load module is divided into two parts, and shunting of the power supply current is achieved. The bypass shunt module has a known shunt ratio, and the actual power supply current provided by the power supply is calculated according to the shunt ratio and the output current value of the detection module; shunting is carried out by adopting a PCB printed wire shunting scheme, so that large current detection can be realized by adopting a small-range current sensor detection mode, a large number of discrete electronic devices do not need to be used, and the circuit has the advantages of small circuit size, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of motor control, and more specifically relates to a device for expanding the detection range of a current sensor. Background technique [0002] The electric servo mechanism for aerospace uses various motors (DC brush motor, DC brushless motor, permanent magnet synchronous motor) as the core of electromechanical energy conversion. The current is relatively large, in order to prevent damage to other related devices by the inrush current, it is necessary to limit the inrush current. [0003] The current limiting method is to detect the bus current. The detected signal is compared with a reference voltage through a comparator. When the detected signal voltage exceeds the reference voltage, the comparator is reversed. At this time, the peripheral logic circuit of the motor drive is triggered to turn off the power bridge drive. signal, so that the bus current drops rapidly. Current detection methods include pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/09G01R15/20G01R19/00
CPCG01R15/09G01R15/202G01R19/0092
Inventor 何家远张祎潘卓王洪生张金铎
Owner HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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