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Circuit state discrimination device and method

A state discrimination and circuit technology, applied in the direction of circuit devices, emergency protection circuit devices, parts of emergency protection devices, etc., can solve the problems of being unable to judge whether the short-circuit motor is started or over-current, whether it is short-circuited or the motor is started or over-current, etc.

Pending Publication Date: 2021-09-14
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a circuit state judging device and method for the problem that it is impossible to judge short circuit, motor start or overcurrent when the current exceeds The problem

Method used

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  • Circuit state discrimination device and method
  • Circuit state discrimination device and method
  • Circuit state discrimination device and method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] In order to facilitate the understanding of the present invention, various embodiments of the present invention defined by the claims will be described more fully below with reference to the relevant drawings. Preferred embodiments of the invention have been shown in the drawings, which contain various specific details to facilitate that understanding but which should be regarded as exemplary only. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Accordingly, those of ordinary skill in the art will recognize that changes and modifications of the various embodiments described herein can be made without departing from the scope of the invention as defined in the appended claims. Also, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0044]...

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Abstract

The invention relates to a circuit state discrimination device and method, and the device comprises a transmission module which is used for receiving or transmitting a signal; and a current detection module connected with the transmission module, wherein the current detection module comprises a current sensor, the current sensor is externally connected with a shunt resistor, and the current detection module judges the state of the circuit through the shunt resistor. According to the invention, the circuit state is discriminated through the external shunt resistor, and the circuit is protected according to the circuit state.

Description

technical field [0001] The invention relates to the technical field of circuit control, in particular to a circuit state judging device and method. Background technique [0002] Because the circuit in the short-circuit or overload equipment usually has over-current or high temperature phenomenon, an over-current protection device is usually installed to prevent the circuit from being permanently damaged. [0003] The current protection equipment usually uses an overcurrent sensor to detect the current. Since the temperature drift calibration is integrated inside the chip, it is sufficient to directly read the voltage value. [0004] However, when the current is exceeded, it is impossible to judge whether it is a short circuit, a motor start or an overcurrent. Contents of the invention [0005] Based on this, it is necessary to provide a circuit state judging device and method for the problem that it is impossible to judge short circuit, motor start or overcurrent when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08H02H1/00
CPCH02H3/08H02H1/0038
Inventor 元红妍
Owner YANTAI UNIV
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