CN209282830U - Surge current suppression circuit - Google Patents
Surge current suppression circuit Download PDFInfo
- Publication number
- CN209282830U CN209282830U CN201920250655.2U CN201920250655U CN209282830U CN 209282830 U CN209282830 U CN 209282830U CN 201920250655 U CN201920250655 U CN 201920250655U CN 209282830 U CN209282830 U CN 209282830U
- Authority
- CN
- China
- Prior art keywords
- switching tube
- triode
- resistance
- connect
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to circuit protection technical fields, the utility model is to solve the problems, such as that the inhibitory effect of existing surge current suppression circuit is bad and service life is lower, it is proposed a kind of surge current suppression circuit, including first capacitor, first resistor, second resistance, switching tube and ON-OFF control circuit, one end of first capacitor is connect with the anode of first voltage input terminal, the other end of first capacitor one end connect and ground with the drain electrode of switching tube and first resistor respectively, the other end of the first resistor cathode with first voltage input terminal respectively, the source electrode of switching tube is connected with ON-OFF control circuit, the source electrode of switching tube is connect with the grid of switching tube and ON-OFF control circuit respectively by the second resistance.The surge current that the utility model generates when effectively electronic equipment can be inhibited to be switched on can be effectively reduced the power loss of surge current suppression circuit, and carry out being switched off and on control by switching tube, and service life is longer, be suitable for high-power electronic device.
Description
Technical field
The utility model relates to circuit protection technical fields, relate in particular to a kind of surge current suppression circuit.
Background technique
Surge current refers to that electrical equipment is exactly to set in great-power electronic in the current characteristics for connecting moment in simple terms
When standby starting, since electronic equipment internal is there are biggish filter capacitor, it is wave that powered on moment, which generates biggish charging current,
Gush electric current.Surge current not only damages the electronic device of electronic equipment internal, while will also result in electricity to electrical network facilities
Magnetic disturbance and injury, surge current are all critically important to the safety of supply network and electrical equipment.It usually requires in engineering to surge
Electric current carries out inhibition processing.
The suppressor mode of conventional surge electric current is usually that NCT thermistor is connected on filter capacitor, and power supply connects wink
Between, since resistance value is larger under normal conditions for thermistor, the charging current to capacitor is limited, surge current is carried out to reach
The purpose of inhibition.This mode is commonplace in the lesser application of electric current, still, when short supply interruption, since thermistor needs
It could restore original resistance value longer cooling time, when being re-powered again before thermistor does not cool down completely, temperature-sensitive electricity
The protective effect of resistance will decline.Furthermore for high-power electronic device, due to the limitation of thermistor rated current, to wave
The inhibitory effect for gushing electric current is less desirable.
Application publication number CN107317315A discloses a kind of surge current suppression circuit module.Inrush current restraining electricity
Road module connects moment by the control to power relay, power supply, and the inhibition of surge current is carried out by thermistor, works as electricity
After sub- equipment steady operation, thermistor is detached from current supply circuit, obtains thermistor cooling to restore big resistance characteristic.But
It is that this in such a way that power relay carries out switch control to circuit, service life is lower.
Utility model content
The purpose of this utility model be to solve existing surge current suppression circuit inhibitory effect it is bad and using the longevity
Lower problem is ordered, proposes a kind of surge current suppression circuit.
The utility model solves technical solution used by above-mentioned technical problem: surge current suppression circuit, feature
Be, including first capacitor, first resistor, second resistance, switching tube and ON-OFF control circuit, one end of the first capacitor with
The anode connection of first voltage input terminal, the other end of first capacitor connect with one end of the drain electrode of switching tube and first resistor respectively
It connects and is grounded, the other end of the first resistor is controlled with the cathode of first voltage input terminal, the source electrode of switching tube and switch respectively
The source electrode of circuit connection processed, the switching tube is connected with the grid of switching tube and ON-OFF control circuit respectively by the second resistance
It connects.
Further, it control effectively for the on-off of switch tube, the ON-OFF control circuit includes control module, the
Two voltage input ports, the first triode, the second triode, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and
The control output end mouthful of seven resistance, the control module is connect by the 6th resistance with the base stage of the second triode, described
The base stage of second triode is connect with the source electrode of the emitter of the second triode and switching tube respectively by the 5th resistance, institute
The collector for stating the second triode is connect by the 3rd resistor with the base stage of the first triode, the base of first triode
Pole is connect with the emitter of the first triode and second voltage input terminal respectively by the 4th resistance, first triode
Collector connected by the grid of the 7th resistance and switching tube.
Further, for convenient for the cut-off of switch tube control, the switching tube is that metal-oxide-semiconductor or insulated gate bipolar are brilliant
Body pipe, first triode are PNP type triode, and second triode is NPN type triode.
Further, to avoid switching tube from malfunctioning, the surge current suppression circuit further includes the second capacitor, and described
One end of two capacitors and the source electrode of switching tube connect, and the other end of the second capacitor and the grid of switching tube connect.
It further, is more than maximum permissible voltage to prevent grid voltage fluctuation, the surge current suppression circuit also wraps
Voltage-stabiliser tube is included, the anode of the voltage-stabiliser tube is connect with the source electrode of switching tube, and the cathode of voltage-stabiliser tube and the grid of switching tube connect.
The beneficial effects of the utility model are: surge current suppression circuit described in the utility model, passes through first resistor
The surge current generated to powered on moment inhibits, when the voltage value of first capacitor is close to input voltage maximum value, at this point,
Surge current is smaller, and ON-OFF control circuit is short-circuit by first resistor.When the utility model effectively can inhibit electronic equipment to be switched on
The surge current of generation, can be effectively reduced the power loss of surge current suppression circuit, guarantee the steady of power supply and electronic equipment
Fixed work, and since ON-OFF control circuit is connect with the cathode of first voltage input terminal, when being switched on, without increasing by two
Pole pipe ON-OFF control circuit will not be damaged by the high pressure at first resistor both ends, be reduced costs, the utility model passes through switch
Pipe carries out being switched off and on control, and service life is longer, and circuit structure is simple.
Detailed description of the invention
Fig. 1 is surge current suppression circuit structural schematic diagram described in the utility model embodiment；
Description of symbols:
R1- first resistor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The 5th resistance of R5-；The 6th electricity of R6-
Resistance；The 7th resistance of R7-；C1- first capacitor；The second capacitor of C2-；Q1- switching tube；The first triode of V1-；The second triode of V2-；
ZD1- voltage-stabiliser tube；VIN1- first voltage input terminal；VIN2- second voltage input terminal.
Specific embodiment
The embodiments of the present invention is described in detail below in conjunction with attached drawing.
Surge current suppression circuit described in the utility model, including first capacitor, first resistor, second resistance, switch
Pipe and ON-OFF control circuit, which is characterized in that one end of the first capacitor is connect with the anode of first voltage input terminal, and first
The other end of capacitor one end connect and ground with the drain electrode of switching tube and first resistor respectively, the other end of the first resistor
It is connect respectively with the cathode of first voltage input terminal, the source electrode of switching tube and ON-OFF control circuit, the source electrode of the switching tube is logical
The second resistance is crossed to connect with the grid of switching tube and ON-OFF control circuit respectively.
It is connected moment in power supply, first voltage input terminal is first capacitor charging, and switching tube is in off state at this time, is led to
First resistor is crossed to limit surge current, when first capacitor voltage value close to first voltage input terminal cathode voltage
When, ON-OFF control circuit control switch pipe conducting, voltage input end is directly first capacitor charging, at this point, due to first capacitor
Voltage and input voltage difference it is smaller, charging current is smaller, and surge current is also smaller.
Embodiment
Surge current suppression circuit described in the utility model embodiment, as shown in Figure 1, including first capacitor C1, first
Resistance R1, second resistance R2, switching tube Q1 and ON-OFF control circuit, one end of the first capacitor C1 and first voltage input terminal
Positive VIN1+ connection, the other end of first capacitor C1 connect with one end of the drain D of switching tube Q1 and first resistor R1 respectively
And it is grounded, the other end of the first resistor R1 source S with the cathode VIN1- of first voltage input terminal, switching tube Q1 respectively
It is connected with ON-OFF control circuit, the source S of the switching tube Q1 passes through the second resistance R2 grid G with switching tube Q1 respectively
It is connected with ON-OFF control circuit.
Wherein, switching tube Q1 can be metal-oxide-semiconductor or insulated gate bipolar transistor (IGBT), insulated gate bipolar crystal
Pipe has advantage of both the high input impedance of MOSFET and the low conduction voltage drop of GTR concurrently；First capacitor C1 can be polarized
Capacitor or polarity free capacitor.Before power supply connection, switching tube Q1 is in off state, the anode of first voltage input port
VIN1+ input first capacitor C1 charge, if first capacitor C1 be polarized capacitor, then by first capacitor C1 anode into
Row charging, at this point, first resistor R1 inhibits as charging current of the current-limiting resistance to first capacitor C1, i.e., to filter capacitor
The surge current generated when charging is inhibited.When the voltage value of first capacitor C1 is close to the defeated of first voltage input port VIN1
When entering voltage value, switching tube Q1 is connected in ON-OFF control circuit work, ON-OFF control circuit, after switching tube Q1 conducting, the first electricity
R1 short circuit is hindered, is no longer worked, the positive VIN1+ of first voltage input terminal is directly first capacitor C1 charging, at this point, first capacitor
Voltage difference between C1 and the positive VIN1+ of first voltage input port is smaller, will not generate biggish surge current.
Preferably, as shown in Figure 1, the ON-OFF control circuit may include control module, second voltage input port
VIN2, the first triode V1, the second triode V2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 and
The control output end mouthful of 7th resistance R7, the control module are connected by the base stage of the 6th resistance R6 and the second triode V2
It connects, the base stage of the second triode V2 passes through the 5th resistance R5 emitter and switching tube with the second triode V2 respectively
The source S of Q1 connects, the base stage that the collector of the second triode V2 passes through the 3rd resistor R3 and the first triode V1
Connection, the base stage of the first triode V1 pass through the 4th resistance R4 emitter and second with the first triode V1 respectively
Voltage input end VIN2 connection, the collector of the first triode V1 pass through the grid of the 7th the resistance R7 and switching tube Q1
G connection.
In the present embodiment, control module can be programmable controller, such as PLC.First triode V1 can be positive-negative-positive three
Pole pipe, the second triode V2 can be NPN type triode.The input voltage of second voltage input port VIN2 can be by
What one voltage input port VIN1 was generated after reduction voltage circuit is depressured, control module controls mould after the preset charged time
The control output end mouthful output high level of block, is connected the second triode V2, makes the first triode V1 after the second triode ON
Second voltage input port VIN2 is connected to, to make out by conducting after the first triode V1 conducting with the grid G of switching tube Q1
Pipe Q1 conducting is closed, after switching tube Q1 conducting, first resistor R1 is in short-circuit condition, at this point, first voltage input terminal VIN1 is direct
For first capacitor C1 charging.
The above-mentioned preset charged time is arranged according to the actual situation, and involved software approach belongs to the prior art,
Details are not described herein again.
Wherein, since the emitter of the second triode V2 in ON-OFF control circuit is connected to the negative of first voltage input terminal
Pole VIN1- is not connect with first resistor R1, therefore when powering on, and the high pressure at the both ends first resistor R1 will not be input to switch
Control circuit, the second triode V2 emitter-base bandgap grading are not subject to high back voltage, therefore in the case where not increasing diode, can be effective
It prevents switching circuit from damaging, improves the safety and stability of circuit, reduce costs, but first voltage is defeated when due to powering on
There is High Pressure Difference with entering the reference of the cathode VIN1- at end relative to first capacitor C1, the collector of the second triode V2 is relative to
The cathode VIN1- of one voltage input end has high pressure, and therefore, high-voltage three-pole pipe is preferred in the second triode V2.
Optionally, described as shown in Figure 1, surge current suppression circuit described in the present embodiment further includes the second capacitor C2
One end of second capacitor C2 is connect with the source S of switching tube Q1, and the other end of the second capacitor C2 and the grid G of switching tube Q1 connect
It connects.
Increasing by the second capacitor C2 can inhibit to interfere, and prevent the grid G of switching tube Q1 from interfering and switching tube Q1 is caused to malfunction.
Optionally, described steady as shown in Figure 1, surge current suppression circuit described in the present embodiment further includes voltage-stabiliser tube ZD1
The anode of pressure pipe ZD1 is connect with the source S of switching tube Q1, and the cathode of voltage-stabiliser tube ZD1 is connect with the grid G of switching tube Q1.
Shunt regulator tube ZD1 can prevent switching tube Q1 grid G voltage fluctuation be more than switching tube Q1 grid G maximum permit
Perhaps voltage prevents the grid G of switching tube Q1 and source S to be broken down by high-voltage with this.
Claims (5)
1. surge current suppression circuit, which is characterized in that including first capacitor, first resistor, second resistance, switching tube and switch
Control circuit, one end of the first capacitor are connect with the anode of first voltage input terminal, the other end of first capacitor respectively with
The drain electrode of switching tube and one end connect and ground of first resistor, the other end of the first resistor are inputted with first voltage respectively
The cathode at end, the source electrode of switching tube are connected with ON-OFF control circuit, and the source electrode of the switching tube is distinguished by the second resistance
It is connect with the grid of switching tube and ON-OFF control circuit.
2. surge current suppression circuit as described in claim 1, which is characterized in that the ON-OFF control circuit includes control mould
Block, second voltage input port, the first triode, the second triode, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance
It is connect by the 6th resistance with the base stage of the second triode with the control output end mouthful of the 7th resistance, the control module,
The base stage of second triode is connected with the source electrode of the emitter of the second triode and switching tube respectively by the 5th resistance
It connects, the collector of second triode is connect by the 3rd resistor with the base stage of the first triode, the one or three pole
The base stage of pipe is connect with the emitter of the first triode and second voltage input terminal respectively by the 4th resistance, and described first
The collector of triode is connected by the grid of the 7th resistance and switching tube.
3. surge current suppression circuit as claimed in claim 2, which is characterized in that the switching tube is metal-oxide-semiconductor or insulation
Grid bipolar junction transistor, first triode are PNP type triode, and second triode is NPN type triode.
4. surge current suppression circuit as described in claim 1, which is characterized in that it further include the second capacitor, second electricity
One end of appearance and the source electrode of switching tube connect, and the other end of the second capacitor and the grid of switching tube connect.
5. surge current suppression circuit as described in claim 1, which is characterized in that it further include voltage-stabiliser tube, the voltage-stabiliser tube
Anode is connect with the source electrode of switching tube, and the cathode of voltage-stabiliser tube and the grid of switching tube connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920250655.2U CN209282830U (en) | 2019-02-27 | 2019-02-27 | Surge current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920250655.2U CN209282830U (en) | 2019-02-27 | 2019-02-27 | Surge current suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282830U true CN209282830U (en) | 2019-08-20 |
Family
ID=67606462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920250655.2U Active CN209282830U (en) | 2019-02-27 | 2019-02-27 | Surge current suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209282830U (en) |
-
2019
- 2019-02-27 CN CN201920250655.2U patent/CN209282830U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101237137A (en) | Over voltage and under-voltage device | |
| CN105553246B (en) | Upper and lower electric drive circuit and its control method | |
| CN102857083A (en) | Input surge current suppression circuit suitable for power factor correction (PFC) converter | |
| CN108448557A (en) | A kind of High Power Airborne DC over-voltage surge restraint circuit | |
| CN112152478A (en) | Characteristic current generating circuit | |
| CN107196269A (en) | A kind of DC protection circuit and its guard method | |
| CN107947557B (en) | Soft start circuit for resisting overvoltage and undervoltage surges | |
| CN209217706U (en) | Surge current suppression circuit | |
| CN203491680U (en) | Automatic reset electric leakage overvoltage/undervoltage protection circuit | |
| CN110445359A (en) | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection | |
| CN209282830U (en) | Surge current suppression circuit | |
| CN108134381A (en) | Overvoltage crowbar, method and electronic equipment | |
| CN209375126U (en) | A kind of surge current suppression circuit | |
| CN207625441U (en) | A kind of soft starting circuit of anti-over-pressed, under-voltage surge | |
| CN203826946U (en) | Cell explosionproof circuit and cell charging circuit | |
| CN103326344B (en) | A kind of overvoltage limiting circuit | |
| CN206673557U (en) | A kind of electric instrument intelligent protection circuit | |
| CN205304240U (en) | Control circuit is prevented joining conversely by high -power direct current | |
| CN212875662U (en) | Power protection circuit and power | |
| CN204206316U (en) | A kind of restraining device of impulse current of starting shooting and television set | |
| CN107465173A (en) | A kind of space power system accessory power supply protection circuit | |
| CN209692346U (en) | A kind of over-current protection circuit module | |
| CN111416323A (en) | Self-recovery type over-voltage and under-voltage protection circuit with leakage protection | |
| CN204131114U (en) | A kind of terminal block circuit structure | |
| CN206004291U (en) | A kind of residual current action breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |