Unlock instant, AI-driven research and patent intelligence for your innovation.

Adjustable overcurrent protection and overcurrent turn-off self-locking circuit

A self-locking circuit and over-current protection technology, which is applied in emergency protection circuit devices, over-current-responsive protection, circuit devices, etc., can solve problems such as driver chip burnout and inability to control over-current current, and achieve protection Effects of circuit and load

Inactive Publication Date: 2018-10-09
ANHUI ACT BLUE ENVIRONMENTAL PROTECTION CO LTD
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is impossible to control the magnitude of the overcurrent current according to the requirements of different loads.
Moreover, if the overcurrent is not canceled in time after the occurrence, it will cause the load driver chip to be in the switching state repeatedly. With the accumulation of heat, it is likely to cause the driver chip to be burned out.

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
  • Adjustable overcurrent protection and overcurrent turn-off self-locking circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An adjustable over-current protection and over-current shutdown self-locking circuit, such as figure 1 As shown, it consists of a current sampling circuit, an overcurrent protection setting circuit and an overcurrent self-locking circuit. The current sampling circuit includes a first triode Q1 and a first diode D1. The first triode Q1 The base of the first triode Q1 is connected to the load control signal through the first diode D1 and the first resistor R1, the collector of the first triode Q1 is connected to the power supply VCC through the load M1, and the emitter of the first triode Q1 is connected through the second Resistor R2 is grounded to GND;

[0017] The overcurrent protection setting circuit includes a third transistor Q3 and a second diode D2, the base of the third transistor Q3 is connected to the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the sixth resistor R6. The collector of the transistor Q2 is connected to the fift...

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 discloses an adjustable overcurrent protection and overcurrent turn-off self-locking circuit, and relates to the technical field of electrical control. The adjustable overcurrent protection and overcurrent turn-off self-locking circuit comprises a current sampling circuit, an overcurrent protection setting circuit and an overcurrent self-locking circuit, wherein the current samplingcircuit comprises a first triode and a first diode, the overcurrent protection setting circuit comprises a third triode and a second diode, and the overcurrent self-locking circuit comprises a secondtriode. Through the adoption of a voltage-triggered hardware locking and unlocking circuit formed by discrete components, state information during triggering can be continuously maintained after a triggering signal disappears, and the information can be quickly fed back to a control end causing triggering of a voltage signal, so that a purpose of protecting the circuit and the load is achieved.

Description

technical field [0001] The invention relates to the technical field of electrical control, in particular to an adjustable overcurrent protection and overcurrent shutdown self-locking circuit. Background technique [0002] With the rapid development of power electronic technology, power electronic equipment tends to be highly centralized and miniaturized. In this way, the wiring workload becomes larger and more complicated. In practical applications, it is inevitable that there will be wiring errors, and often the I / O port will be accidentally connected to other loads, and a high-power load will be connected by mistake, which may cause the port to be overloaded. If the flow is burned, it will cause trouble for after-sales service. Therefore, it is necessary to design overcurrent protection measures for each I / O port of the system to avoid similar accidents. [0003] In the current hardware circuit, the protection signal changes at any time with the change of the over-curren...

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
IPC IPC(8): H02H3/00H02H3/08
CPCH02H3/006H02H3/08
Inventor 刘屹朱庆朱弢秦亮李超
Owner ANHUI ACT BLUE ENVIRONMENTAL PROTECTION CO LTD