Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Leakage monitoring chip for leakage protector

A leakage protector and monitoring chip technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, electrical components, etc., can solve the problems of leakage current that is not easy to regulate, difficult to produce, and malfunction of the protector. , to avoid the bad phenomenon of leakage current exceeding the standard and serious malfunction, simple and easy production and debugging, and protect personal safety.

Active Publication Date: 2012-10-10
田子欣
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can only monitor the leakage fault of the main circuit and the zero live wire (that is, the two poles are on and off), and cannot monitor the live fault of the ground wire at the same time.
In order to achieve the function of three-pole on-off, some use a monitoring circuit directly driven by a thyristor (without signal amplification), some use a parallel input method to add a monitoring circuit on an ordinary single-input chip circuit, and some directly Add an ordinary single-input chip (that is, two ICs) to drive the monitoring circuit; these measures have many disadvantages, such as when the main circuit and the ground wire have a leakage fault at the same time, the actual value of the leakage action current (that is, the main circuit and the ground wire) will appear. The sum of the leakage action current of the ground wire) far exceeds the national standard, which seriously threatens personal safety; some main circuits will have double and subtractive phenomena at the same time, that is, the leakage action current of the L or N line will exceed the safety standard, and the other In phase N or L line, the leakage action current is too small, which leads to serious malfunction of the protector; moreover, the leakage action current is not easy to control, the circuit structure is complex, there are many components, the creepage distance is insufficient, the failure rate is high, and the production is difficult. Wait

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Leakage monitoring chip for leakage protector
  • Leakage monitoring chip for leakage protector
  • Leakage monitoring chip for leakage protector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0012] Such as figure 1 As shown, it is a leakage monitoring chip of a leakage protector, including a power supply voltage stabilization circuit, a reference voltage generator and a latch output circuit, wherein the power supply voltage stabilization circuit is a reference voltage generator, a latch output circuit and the following The circuit provides working voltage, and the input terminals of the power supply voltage stabilizing circuit are pins 8 and 4 of the leakage monitoring chip; the feature of the present invention is that it also includes a first amplifier circuit and a second amplifier circuit with the same circuit structure and performance, and the first differential amplifier One input end of the circuit is electrically connected to an input end of the second differential amplifier circuit and is connected to an external circuit as ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a leakage monitoring chip for a leakage protector. The leakage monitoring chip comprises a power voltage regulator circuit, a reference voltage generator and a latching output circuit, wherein the power voltage regulator circuit is used for providing working voltage for the reference voltage generator and the latching output circuit; the leakage monitoring chip further comprises a circuit structure and a first amplifying circuit and a second amplifying circuit which have the same performance; an input end of a first differential amplifier circuit is electrically connected with an input end of a second differential amplifier circuit, and the end is used as the public input end to connect with an external circuit; the other input end of the first differential amplifier circuit is connected with the external circuit; the other input end of the second differential amplifier circuit is connected with the external circuit; the output end of the first amplifying circuit and the output end of the second amplifying circuit are electrically connected with the input end of the latching output circuit respectively; the reference voltage generator circuit is used for respectively providing reference voltage for the input ends of the first differential amplifier circuit and the second differential amplifier circuit. The leakage monitoring chip provided by the invention has the advantages that the leakage faults of the main loop and the ground wire can be monitored synchronously; and the two fault action current can be adjusted randomly in the scope of national safety standards; the leakage monitoring chip works stably and reliably and the personal safety can be more effectively protected.

Description

technical field [0001] The invention relates to a leakage monitoring chip of a leakage protector. Background technique [0002] The current leakage monitoring chips of existing leakage protectors all have only one amplification and input circuit, such as 54123 and 4145. It can only monitor the leakage fault of the main circuit and the zero live wire (that is, the two poles are on and off), and cannot monitor the live fault of the ground wire at the same time. In order to achieve the function of three-pole on-off, some use a monitoring circuit directly driven by a thyristor (without signal amplification), some use a parallel input method to add a monitoring circuit on an ordinary single-input chip circuit, and some directly Add an ordinary single-input chip (that is, two ICs) to drive the monitoring circuit; these measures have many disadvantages, such as when the main circuit and the ground wire have a leakage fault at the same time, the actual value of the leakage action c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/33
Inventor 田子欣田玉江
Owner 田子欣
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products