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Circuit for suppressing surge current

A surge and current technology, applied in the field of circuit protection, can solve problems such as capacitor short circuit and capacitor life reduction, and achieve the effect of suppressing surge current and protecting components

Active Publication Date: 2019-11-19
GUANGDONG INSPUR BIG DATA RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If no suppression components and circuits are added at the moment of power startup, the capacitor will be short-circuited instantaneously, and the surge current will also reduce the life of the capacitor

Method used

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  • Circuit for suppressing surge current
  • Circuit for suppressing surge current
  • Circuit for suppressing surge current

Examples

Experimental program
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Embodiment approach

[0061] Optionally, in another embodiment of the present invention, an implementation of the circuit for suppressing inrush current also includes a Zener diode:

[0062] Among them, the Zener diode (Zener Diode) is a diode that uses the reverse breakdown state of the pn junction, and its current can change in a wide range while the voltage remains basically unchanged. It is used to protect the first A semiconductor field effect transistor 411 .

[0063] Specifically, one end of the Zener diode is connected to the control end of the first semiconductor field effect transistor 411 , and the other end of the Zener diode is grounded.

[0064] In another optional embodiment of the present invention, an implementation of the circuit for suppressing inrush current also includes a current limiting resistor:

[0065] Specifically, the current limiting resistor is connected between the power supply and the output terminal of the circuit for suppressing surge current.

[0066] It can be...

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Abstract

The invention provides a circuit for suppressing the surge current. The circuit includes a first control unit, a second control unit, a load capacitor, and a surge discharge unit, wherein the surge discharge unit includes a shunt unit and is connected with one end of the load capacitor; the other end of the load capacitor is connected to a power source; the first control unit is connected to the shunt unit in the surge discharge unit; one end of the second control unit is connected to the shunt unit in the surge discharge unit; the other end of the second control unit is connected to a junction of the surge discharge unit and the load capacitor; if a surge current exists, the second control unit is configured to shunt the surge current input into the load capacitor; if the surge current decreases to a set value, the second control unit is turned off and the first control unit is configured to enable the shunt unit in the surge discharge unit; and the shunt unit is in communication withthe load capacitor after being enabled. In this way, a purpose of suppressing the surge current in the circuit and further protecting the components in the circuit is achieved.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to a circuit for suppressing surge current. Background technique [0002] With the development of science and technology, people pay more and more attention to the safety of circuits. At present, the input terminal in the circuit usually contains a capacitor and a capacitive load. When the power supply is turned on, the current will charge the capacitive load, which may generate a peak current, that is, an inrush current. If no suppression components and circuits are added at the moment of power startup, the capacitor will be short-circuited instantaneously, and the inrush current will also reduce the life of the capacitor. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a circuit for suppressing surge current, which is used to suppress the surge current in the circuit, thereby protecting components in the circuit. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/00H02H9/02
CPCH02H9/005H02H9/02H02H9/025
Inventor 杨舜量
Owner GUANGDONG INSPUR BIG DATA RES CO LTD
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