CN202997538U - A power source electrification surge current suppression circuit - Google Patents
A power source electrification surge current suppression circuit Download PDFInfo
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- CN202997538U CN202997538U CN 201220668969 CN201220668969U CN202997538U CN 202997538 U CN202997538 U CN 202997538U CN 201220668969 CN201220668969 CN 201220668969 CN 201220668969 U CN201220668969 U CN 201220668969U CN 202997538 U CN202997538 U CN 202997538U
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Abstract
The utility model belongs to the field of avionic technology and discloses a power source electrification surge current suppression circuit comprising a power source reversal connection prevention circuit [1], a power source input impedance channel [2], a power source input switch channel [3], a switch channel control circuit [4] and a filter capacitor [5]. The power source reversal connection prevention circuit [1] is connected with the power source input impedance channel [2]; an input end of the power source input switch channel [3] is connected with an output end of the power source reversal connection prevention circuit [1]; an output end of the power source input switch channel [3] is connected to an output end of the power source input impedance channel [2]; the switch channel control circuit [4] comprises a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an triode V3, a voltage regulating tube V4 and a comparator N1; the resistor R5, the triode V3 and the voltage regulating tube V4 form a voltage regulating tube voltage-stabilizing circuit; the resistor R2, the resistor R3, the resistor R4 and the resistor R6 divide the power input voltage and the terminal voltage of the filter capacitor [5] and the voltages are sent to the positive and the negative input ends of the comparator N1 after dividing.
Description
Technical field
The utility model belongs to the avionics field, relates to a kind of power supply electrifying impulse current and suppresses circuit.
Background technology
Avionic device often adopts the 28V DC power supply to power, after the 28V DC power supply is linked into electronic equipment, electronic equipment often carries out capacitor filtering at power input to it, then by the secondary power supply modular converter, filtered 28V DC power supply is converted to 15V,-15V, 5V, the low-voltages such as 3.3V are for chip.In the electronic equipment power source power up, the filter capacitor of power input and secondary power supply modular converter input side need to absorb a large amount of immediate currents and set up voltage, thereby can produce very large power-on impact current, if unconstrained, tend to affect the normal operation of electronic equipment, as: easily burn power supply input circuit series connection fuse, make that power supply input circuit switching tube overpower damages, require under the power supply multi-load case input power that larger capacity etc. is provided.
Summary of the invention
Goal of the invention: the purpose of this utility model is to provide a kind of novel power supply power-on impact current and suppresses circuit, solves circuit with large input filter capacitor in the power supply electrifying process, the impulse current problem that is caused by filter capacitor.
technical scheme: a kind of power supply electrifying impulse current suppresses circuit, comprise: anti-power supply reversal connection circuit 1, power supply input impedance passage 2, power supply input switch passage 3, switch channel control circuit 4 and filter capacitor 5, described anti-power supply reversal connection circuit 1 is connected with power supply input impedance passage 2, the input of described power supply input switch passage 3 connects the output of anti-power supply reversal connection circuit 1, the output of power supply input switch passage 3 is connected to the output of power supply input impedance passage 2, described switch channel control circuit 4 comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, triode V3, voltage-stabiliser tube V4, comparator N1, resistance R 5, triode V3, voltage-stabiliser tube V4 consists of the voltage-stabiliser tube voltage stabilizing circuit, resistance R 2, resistance R 3 and resistance R 4, resistance R 6 is respectively to the terminal voltage dividing potential drop of power supply input and filter capacitor 5, just sending respectively comparator N1 after dividing potential drop, negative input end.
Described anti-power supply reversal connection circuit 1 is made of diode V1, and described power supply input impedance passage 2 is made of resistance R 1, and described power supply input switch passage 3 is made of relay K 1.
Described filter capacitor 5 is made of at least one capacitor C 1.
Beneficial effect: the utility model provides a kind of novel power supply power-on impact current to suppress circuit, in the power supply electrifying process, utilizes the impedance of power supply input circuit that filter capacitor is charged, and suppresses the impulse current that is caused by filter capacitor.The filter capacitor terminal voltage reaches set point, after the secondary power supply modular converter startup work of rear end, and the Switching power input circuit.After the circuit normal operation, the impedance of former power supply input circuit is not producing power consumption.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model execution mode;
Fig. 2 is the circuit diagram of the utility model execution mode.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, sees also Fig. 1 to Fig. 2.
a kind of power supply electrifying impulse current suppresses circuit, comprise: anti-power supply reversal connection circuit 1, power supply input impedance passage 2, power supply input switch passage 3, switch channel control circuit 4 and filter capacitor 5, described anti-power supply reversal connection circuit 1 is connected with power supply input impedance passage 2, the input of described power supply input switch passage 3 connects the output of anti-power supply reversal connection circuit 1, the output of power supply input switch passage 3 is connected to the output of power supply input impedance passage 2, described switch channel control circuit 4 comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, triode V3, voltage-stabiliser tube V4, comparator N1, resistance R 5, triode V3, voltage-stabiliser tube V4 consists of the voltage-stabiliser tube voltage stabilizing circuit, resistance R 2, resistance R 3 and resistance R 4, resistance R 6 is respectively to the terminal voltage dividing potential drop of power supply input and filter capacitor 5, just sending respectively comparator N1 after dividing potential drop, negative input end.
Described anti-power supply reversal connection circuit 1 is made of diode V1, and described power supply input impedance passage 2 is made of resistance R 1, and described power supply input switch passage 3 is made of relay K 1.When the power supply input was normal, V1 was as the power supply input channel; When power cut-off, V1 plays the effect that the energy that prevents filter capacitor C1 recharges power input; When the power supply input reverse-connection, V1 plays and prevents the power supply input reverse-connection and cause follow-up load equipment to damage.Power supply input impedance passage 2 is made of resistance R 1.After powering on, power supply is inputted at first through diode V1, and 1 couple of filter capacitor C1 of resistance R charges.Utilize the impedance of resistance R 1 own, power-on impact current is suppressed.Power supply input switch passage 3 is made of relay K 1.Before powering on, the switch of relay K 1 is in off-state.After receiving " closure " control signal that switch channel control circuit 4 sends, the switch adhesive of relay K 1.After receiving that switch channel control circuit 4 sends the "off" control signal, the switch of relay K 1 disconnects.
Switch channel control circuit 4 sends " closure " control signal: after input power powered on, the voltage-stabiliser tube voltage stabilizing circuit output+5V high level that is made of resistance R 5, triode V3, voltage-stabiliser tube V4 was to the VCC end of relay K 1.Adjust the resistance of R2, resistance R 3, resistance R 4, resistance R 6, make after filter capacitor C1 terminal voltage reaches set point, the partial pressure value of resistance R 4,6 pairs of capacitance terminal voltages of resistance R is higher than the partial pressure value of resistance R 2,3 pairs of power supply inputs of resistance R, and N1 output this moment 0V low level is to the GND end of relay K 1.Relay K 1 Inside coil energising, relay K 1 internal switch adhesive, the power supply input is powered to follow-up load through relay K 1 internal switch.
Switch channel control circuit 4 sends the "off" control signal: after power supply input outage, export unsettled signal to the VCC end of relay K 1 by the voltage-stabiliser tube voltage stabilizing circuit that resistance R 5, triode V3, voltage-stabiliser tube V4 consist of, relay K 1 Inside coil outage, relay K 1 internal switch disconnects (can select inside with the relay of parasitic diode, when being used for the relay outage, for relay coil provides faradic Releasing loop).
Described filter capacitor 5 is made of at least one capacitor C 1.When input power powers on, by resistance R 1, it is carried out current limliting.After the input power outage, capacitor C 1 will be discharged by rear end load and resistance R 4, resistance R 6.
The course of work of the present utility model is as follows:
(1) input power power up.
Before power supply electrifying, power supply input switch passage 3 is in off-state.After power supply electrifying, the power supply input is by anti-power supply reversal connection circuit 1, power supply input impedance passage 2 charges for filter capacitor 5, utilizes the impedance of power supply input impedance passage 2 self to suppress the power-on impact current that is caused by filter capacitor 5, and filter capacitor 5 terminal voltages will progressively raise in this process.Switch channel control circuit 4 detects power input voltage and filter capacitor 5 terminal voltages in real time, the power supply input is normal when detecting, and after filter capacitor 5 terminal voltages are elevated to set point (being set as the starting resistor of rear end secondary power supply modular converter), switch channel control circuit 4 sends " closure " control signal, with power supply input switch passage 3 closures.Because 3 impedances of power supply input switch passage are almost nil, thus power supply input will be not with power supply input impedance passage 2 as the power supply input circuit, the impedance of power supply input impedance passage 2 will not produce power consumption.Anti-power supply reversal connection circuit 1 plays the purpose that prevents the power supply input reverse-connection and cause follow-up load equipment to damage.
(2) input power power process.
Switch channel control circuit 4 detects power input voltage and filter capacitor 5 terminal voltages in real time, and after switch channel control circuit 4 detected the input power outage, switch channel control circuit 4 sent the "off" control signal power supply input switch passage 3 is disconnected.After the input power outage, anti-power supply reversal connection circuit 1 plays the effect that prevents that filter capacitor 5 from recharging power input with energy by power supply input impedance passage 2.Filter capacitor 5 will discharge by follow-up load and switch channel control circuit 4 this moment.
The utility model provides a kind of novel power supply power-on impact current to suppress circuit, in the power supply electrifying process, utilizes the impedance of power supply input circuit that filter capacitor is charged, and suppresses the impulse current that is caused by filter capacitor.The filter capacitor terminal voltage reaches set point, after the secondary power supply modular converter startup work of rear end, and the Switching power input circuit.After the circuit normal operation, the impedance of former power supply input circuit is not producing power consumption.
The utility model provides a kind of novel power supply power-on impact current to suppress circuit, in the power supply electrifying process, utilizes the impedance of power supply input circuit that filter capacitor is charged, and suppresses the impulse current that is caused by filter capacitor.The filter capacitor terminal voltage reaches set point, after the secondary power supply modular converter startup work of rear end, and the Switching power input circuit.After the circuit normal operation, the impedance of former power supply input circuit is not producing power consumption.
Claims (3)
1. a power supply electrifying impulse current suppresses circuit, it is characterized in that, comprise: anti-power supply reversal connection circuit [1], power supply input impedance passage [2], power supply input switch passage [3], switch channel control circuit [4] and filter capacitor [5], described anti-power supply reversal connection circuit [1] is connected with power supply input impedance passage [2], the input of described power supply input switch passage [3] connects the output of anti-power supply reversal connection circuit [1], the output of power supply input switch passage [3] is connected to the output of power supply input impedance passage [2], described switch channel control circuit [4] comprises resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, triode V3, voltage-stabiliser tube V4, comparator N1, resistance R 5, triode V3, voltage-stabiliser tube V4 consists of the voltage-stabiliser tube voltage stabilizing circuit, resistance R 2, resistance R 3 and resistance R 4, resistance R 6 is respectively to the terminal voltage dividing potential drop of power supply input and filter capacitor [5], just sending respectively comparator N1 after dividing potential drop, negative input end.
2. a kind of power supply electrifying impulse current according to claim 1 suppresses circuit, it is characterized in that, described anti-power supply reversal connection circuit [1] is made of diode V1, and described power supply input impedance passage [2] is made of resistance R 1, and described power supply input switch passage [3] is made of relay K 1.
3. a kind of power supply electrifying impulse current according to claim 2 suppresses circuit, it is characterized in that, described filter capacitor [5] is made of at least one capacitor C 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220668969 CN202997538U (en) | 2012-12-07 | 2012-12-07 | A power source electrification surge current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220668969 CN202997538U (en) | 2012-12-07 | 2012-12-07 | A power source electrification surge current suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997538U true CN202997538U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220668969 Expired - Lifetime CN202997538U (en) | 2012-12-07 | 2012-12-07 | A power source electrification surge current suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997538U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676725A (en) * | 2013-11-20 | 2014-03-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | High-voltage piezoelectric ceramic controller with function of power-on impact |
| CN103746358A (en) * | 2013-12-27 | 2014-04-23 | 深圳市九洲电器有限公司 | Surge suppression circuit, switching device and set-top box |
| CN108880236A (en) * | 2017-05-09 | 2018-11-23 | 山东朗进科技股份有限公司 | The Boost circuit and suppressing method of surge in a kind of inhibition |
-
2012
- 2012-12-07 CN CN 201220668969 patent/CN202997538U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676725A (en) * | 2013-11-20 | 2014-03-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | High-voltage piezoelectric ceramic controller with function of power-on impact |
| CN103746358A (en) * | 2013-12-27 | 2014-04-23 | 深圳市九洲电器有限公司 | Surge suppression circuit, switching device and set-top box |
| CN103746358B (en) * | 2013-12-27 | 2017-04-12 | 深圳市九洲电器有限公司 | Surge suppression circuit, switching device and set-top box |
| CN108880236A (en) * | 2017-05-09 | 2018-11-23 | 山东朗进科技股份有限公司 | The Boost circuit and suppressing method of surge in a kind of inhibition |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |