CN201717779U - Direct-current power supply input end protector of airborne apparatus - Google Patents
Direct-current power supply input end protector of airborne apparatus Download PDFInfo
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- CN201717779U CN201717779U CN2010201726022U CN201020172602U CN201717779U CN 201717779 U CN201717779 U CN 201717779U CN 2010201726022 U CN2010201726022 U CN 2010201726022U CN 201020172602 U CN201020172602 U CN 201020172602U CN 201717779 U CN201717779 U CN 201717779U
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Abstract
A direct-current power supply input end protector of an airborne apparatus is used for improving the reliability of a switch power supply. According to the technical scheme, the protector comprises a transient inhibition diode, a power MOS tube, a boost strap boosted circuit and a feedback control circuit, the transient inhibition diode is connected with an output end of an input apparatus in parallel, the power MOS tube is connected between the input apparatus and a high frequency switch power supply in series, a grid of the power MOS tube is connected with output ends of the boost strap boosted circuit and the feedback control circuit. The utility model can adsorb the voltage peak, inhibit the starting-up surge current, clamp the over-voltage surge, and ensure the DC-DC high frequency switch power input end not to be interfered by the voltage peak, the input voltage and the starting-up surge current are all in the allowable range, and the DC-DC high frequency switch power supply can be ensured to work safely and reliably.
Description
Technical field
The utility model relates to a kind of can transient peak or surge occur at the input of airborne equipment high frequency switch power the time, and power supply is implemented the device of protection, belongs to the resist technology field.
Background technology
Airborne equipment generally all is equipped with the DC-DC high frequency switch power, and it is the required direct voltage of airborne equipment with the voltage transitions of power supply unit (being generally rectifier, battery pack or DC generator) output.The surge current that the input capacitance of the surge voltage of the due to voltage spikes that is sealed in by circuit, high amplitude and DC-DC power supply inside causes may occur at DC-DC high frequency switch power input, these factors can cause that the DC-DC high frequency switch power damages.The characteristic of due to voltage spikes is the voltage magnitude height, hold time short, energy is little, can cause the high-voltage breakdown of HF switch metal-oxide-semiconductor to damage, can be coupled to simultaneously secondary by the high frequency transformer of power supply inside, scurry into the load of DC-DC high frequency switch power and user's power consumption equipment, cause the power consumption equipment fault.The start surge current is when the DC-DC high frequency switch power powers on; charging forms input voltage to input filter capacitor; the terminal voltage of input filter capacitor is zero before powering on; produce very big charging current when adding input voltage, this electric current can cause faults such as the action of DC generator overpower protection, input insurance damage.The characteristics of overvoltage surge be voltage higher, hold time long, energy is big, can cause the punch through damage of DC-DC high frequency switch power input filter capacitor, HF switch metal-oxide-semiconductor, input overvoltage protection fault such as quit work.
Therefore, design a kind of DC power supply input protector, make the DC-DC high frequency switch power can be safely, work reliably, be the problem that those skilled in the art face.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of simple in structure, multiple functional airborne equipment dc supply input protector is provided.
The purpose of this utility model realizes with following technical proposals:
A kind of airborne equipment dc supply input protector; it comprises Transient Suppression Diode, power MOS pipe, bootstrap circuit boost and feedback control circuit; described Transient Suppression Diode is attempted by the output of input equipment; described power MOS pipe is serially connected between input equipment and the high frequency switch power, and its grid connects the output of bootstrap circuit boost and feedback control circuit.
Above-mentioned airborne equipment dc supply input protector, described bootstrap circuit boost is made up of NE555 chip, voltage-stabiliser tube, diode, resistance, electric capacity, described NE555 chip is connected into timing oscillator, the bootstrap voltage mode signal of its 3 pin output connects the grid of power MOS pipe, second capacity earth successively through first resistance, first electric capacity, first diode and second resistance; The negative electrode of second diode and first voltage-stabiliser tube connects the anode and the negative electrode of first diode respectively, and its anode all connects the output voltage terminal of power MOS pipe.
Above-mentioned airborne equipment dc supply input protector; described feedback control circuit is made up of TL431 standard of precision voltage chip, voltage-stabiliser tube, resistance, electric capacity; the plus earth of described TL431 standard of precision voltage chip; negative electrode is connected to the grid of power MOS pipe through second resistance; the 3rd resistance and the 4th resistance are connected into the series connection bleeder circuit; be connected in the output voltage terminal of power MOS pipe; the feedback voltage signal of its serial connection point output connects the control utmost point of TL431 standard of precision voltage chip, and second voltage-stabiliser tube and the 3rd electric capacity are attempted by on the 4th resistance.
Above-mentioned airborne equipment dc supply input protector; the power supply circuits of described bootstrap circuit boost are made up of the 3rd voltage-stabiliser tube, the 4th electric capacity and the 5th resistance; described the 3rd voltage-stabiliser tube and the 5th resistance string are connected into the Input voltage terminal that is connected to power MOS pipe behind the voltage stabilizing circuit; the output voltage of the 3rd voltage-stabiliser tube connects 4 pin and 8 pin of NE555 chip, and the 4th electric capacity is filter capacitor.
The utility model adopts Transient Suppression Diode to match with the input filter capacitor of DC-DC high frequency switch power, eliminates the influence of transient voltage spikes to the DC-DC high frequency switch power.Bootstrap circuit boost can make the grid voltage of power MOS pipe slowly rise, thereby has suppressed the start surge current; Feedback control circuit and power MOS pipe constitute serial regulating circuit, and the input terminal voltage pincers of DC-DC high frequency switch power are fixed in the normal range (NR).
The utility model can absorb due to voltage spikes, suppresses the start surge current, clamp and decide the overvoltage surge, guarantee that DC-DC high frequency switch power input no-voltage spike disturbs, input voltage, start surge current all in allowed band, guarantee DC-DC high frequency switch power safety, work reliably.
Description of drawings
Fig. 1 is an electric theory diagram of the present utility model;
Fig. 2 is an electrical schematic diagram.
Each label is among the figure: IC1, NE555 chip; VT1, power MOS pipe; DW1～DW3, first～the 3rd voltage-stabiliser tube; DW4, Transient Suppression Diode; T1, standard of precision voltage chip; D1, first diode; D2, second diode; C0, DC-DC high frequency switch power input filter capacitor; C1～C7, first～the 7th electric capacity; R1～R7, first～the 7th resistance.
Embodiment
Referring to Fig. 1, the utility model is connected between input equipment and the DC-DC high frequency switch power, and its circuit is simple, and application is convenient, and major function is inhibition peak voltage, restriction start surge current, clamps and decide surge voltage.Input equipment is DC generator, battery pack or high-frequency switching rectifier, and when voltage instantaneous voltage spike occurring, Transient Suppression Diode DW4 action absorbs spike voltage, and the residue residual voltage is absorbed by DC-DC high frequency switch power input filter capacitor C0.When the DC-DC high frequency switch power powers on, the low pressure and low power metal-oxide-semiconductor turn-offs, input voltage is powered to bootstrap circuit boost, produce low pressure and low power metal-oxide-semiconductor gate drive voltage, the controlled slow rising of this voltage makes the low pressure and low power metal-oxide-semiconductor give DC-DC high frequency switch power input filter capacitor C0 charging through the amplification region, the charging current of restriction input capacitance, charging finishes back low pressure and low power metal-oxide-semiconductor saturation conduction, and power MOS pipe works in the time of amplification region and can set.When surge voltage occurring, feedback control circuit drags down the grid voltage of power MOS pipe, and the input terminal voltage of DC-DC high frequency switch power is stabilized in the magnitude of voltage of setting, thereby pincers have been decided surge voltage.
Referring to Fig. 2, DW4 is a Transient Suppression Diode, and the due to voltage spikes of input is absorbed by DW4, and the residual voltage of due to voltage spikes is absorbed by DC-DC high frequency switch power input filter capacitor C0.Input voltage is through the 5th resistance R 5 current limlitings, give the NE555 chip IC 1 power supply after the 3rd voltage-stabiliser tube DW3 voltage stabilizing, NE555 and R6, R7, C5, C7 constitutes timing oscillator, these chip 3 pin voltages slowly rise, the grid-control voltage of power MOS pipe VT1 is the C2 charging, the VT1 power MOS pipe enters the amplification region by cut-off region, input voltage is given DC-DC high frequency switch power input filter capacitor C0 charging during this period, the restriction inrush current, power MOS pipe VT1 saturation conduction was low-resistance after the input capacitance charging was finished, because the impedance of power MOS pipe saturation conduction is very little, the pressure drop of input voltage on power MOS pipe VT1 is also very little, can not produce too big loss and heat.T1 is a TL431 standard of precision voltage chip, R3, R4 form the Voltage Feedback network, power MOS pipe is a voltage adjuster spare, these several parts are formed serial regulating circuit, when surge voltage occurring, C0 both end voltage U0 raises, the control pole tension UR of T1 is risen, UR and T1 internal reference voltage 2.5Vdc are relatively, when UR voltage during greater than 2.5Vdc, the cathode voltage UK of T1 reduces, and the power MOS pipe grid voltage reduces, make C0 both end voltage U0 be stabilized in set point through the power MOS pipe adjustment, thereby pincers have been decided surge voltage.
Claims (4)
1. airborne equipment dc supply input protector; it is characterized in that; it comprises Transient Suppression Diode (DW4), power MOS pipe (VT1), bootstrap circuit boost and feedback control circuit; described Transient Suppression Diode (DW4) is attempted by the output of input equipment; described power MOS pipe (VT1) is serially connected between input equipment and the high frequency switch power, and its grid connects the output of bootstrap circuit boost and feedback control circuit.
2. according to the described airborne equipment dc supply input of claim 1 protector, it is characterized in that, described bootstrap circuit boost is made up of NE555 chip (IC1), voltage-stabiliser tube, diode, resistance, electric capacity, described NE555 chip (IC1) is connected into timing oscillator, the bootstrap voltage mode signal of its 3 pin output connects the grid of power MOS pipe (VT1), second electric capacity (C2) ground connection successively through first resistance (R1), first electric capacity (C1), first diode (D1) and second resistance (R2); The negative electrode of second diode (D2) and first voltage-stabiliser tube (DW1) connects the anode and the negative electrode of first diode (D1) respectively, and its anode all connects the output voltage terminal of power MOS pipe.
3. according to claim 1 or 2 described airborne equipment dc supply input protectors; it is characterized in that; described feedback control circuit is by TL431 standard of precision voltage chip (T1); voltage-stabiliser tube; resistance; electric capacity is formed; the plus earth of described TL431 standard of precision voltage chip (T1); negative electrode is connected to the grid of power MOS pipe (VT1) through second resistance (R2); the 3rd resistance (R3) and the 4th resistance (R4) are connected into the series connection bleeder circuit; be connected in the output voltage terminal of power MOS pipe; the feedback voltage signal of its serial connection point output connects the control utmost point of TL431 standard of precision voltage chip (T1), and second voltage-stabiliser tube (DW2) and the 3rd electric capacity (C3) are attempted by on the 4th resistance (R4).
4. according to the described airborne equipment dc supply input of claim 3 protector; it is characterized in that; the power supply circuits of described bootstrap circuit boost are made up of the 3rd voltage-stabiliser tube (DW3), the 4th electric capacity (C4) and the 5th resistance (R5); described the 3rd voltage-stabiliser tube (DW3) and the 5th resistance (R5) are concatenated into the Input voltage terminal that is connected to power MOS pipe behind the voltage stabilizing circuit; the output voltage of the 3rd voltage-stabiliser tube (DW3) connects 4 pin and 8 pin of NE555 chip (IC1), and the 4th electric capacity (C4) is filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201726022U CN201717779U (en) | 2010-04-28 | 2010-04-28 | Direct-current power supply input end protector of airborne apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201726022U CN201717779U (en) | 2010-04-28 | 2010-04-28 | Direct-current power supply input end protector of airborne apparatus |
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| Publication Number | Publication Date |
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| CN201717779U true CN201717779U (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201726022U Expired - Fee Related CN201717779U (en) | 2010-04-28 | 2010-04-28 | Direct-current power supply input end protector of airborne apparatus |
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| CN (1) | CN201717779U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023305A (en) * | 2012-12-21 | 2013-04-03 | 中国北车集团大连机车研究所有限公司 | Power source for display unit for driver of electric locomotive |
| CN105099176A (en) * | 2015-08-28 | 2015-11-25 | 浙江嘉科新能源科技有限公司 | Circuit capable of implementing driving power by utilizing charge pump |
| CN105406455A (en) * | 2015-11-10 | 2016-03-16 | 成都华普电器有限公司 | Surge voltage accurate suppression circuit |
| CN106505842A (en) * | 2016-10-19 | 2017-03-15 | 飞亚达（集团）股份有限公司 | Airborne DC source |
| CN107800117A (en) * | 2017-12-06 | 2018-03-13 | 广东工业大学 | A kind of protection circuit against input over-voltage with upper electric Inrush current restraining function |
| CN107968566A (en) * | 2017-12-20 | 2018-04-27 | 上海艾为电子技术股份有限公司 | A kind of power-switching circuit |
| CN108206517A (en) * | 2018-03-08 | 2018-06-26 | 广州金升阳科技有限公司 | A kind of low cost inputs anti-overvoltage crowbar |
| CN110572086A (en) * | 2019-08-28 | 2019-12-13 | 珠海凯邦电机制造有限公司 | Motor drive circuit, motor and electrical equipment |
| CN111641199A (en) * | 2020-05-07 | 2020-09-08 | 中国科学院声学研究所 | Overvoltage protection device and method applied to submarine observation network connection box |
| CN112421594A (en) * | 2020-11-23 | 2021-02-26 | 深圳佑驾创新科技有限公司 | Input protection circuit and vehicle-mounted generator |
| CN113972623A (en) * | 2021-09-29 | 2022-01-25 | 中国兵器装备集团上海电控研究所 | Direct current surge suppression circuit based on NMOS pipe |
-
2010
- 2010-04-28 CN CN2010201726022U patent/CN201717779U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023305A (en) * | 2012-12-21 | 2013-04-03 | 中国北车集团大连机车研究所有限公司 | Power source for display unit for driver of electric locomotive |
| CN103023305B (en) * | 2012-12-21 | 2015-04-15 | 中国北车集团大连机车研究所有限公司 | Power source for display unit for driver of electric locomotive |
| CN105099176A (en) * | 2015-08-28 | 2015-11-25 | 浙江嘉科新能源科技有限公司 | Circuit capable of implementing driving power by utilizing charge pump |
| CN105406455A (en) * | 2015-11-10 | 2016-03-16 | 成都华普电器有限公司 | Surge voltage accurate suppression circuit |
| CN106505842B (en) * | 2016-10-19 | 2019-09-10 | 飞亚达（集团）股份有限公司 | Airborne DC power supply |
| CN106505842A (en) * | 2016-10-19 | 2017-03-15 | 飞亚达（集团）股份有限公司 | Airborne DC source |
| CN107800117B (en) * | 2017-12-06 | 2023-07-25 | 广东工业大学 | Input overvoltage protection circuit with power-on surge current suppression function |
| CN107800117A (en) * | 2017-12-06 | 2018-03-13 | 广东工业大学 | A kind of protection circuit against input over-voltage with upper electric Inrush current restraining function |
| US10756615B2 (en) | 2017-12-20 | 2020-08-25 | Shanghai Awinic Technology Co., LTD | Power supply conversion circuit |
| CN107968566B (en) * | 2017-12-20 | 2020-04-07 | 上海艾为电子技术股份有限公司 | Power supply conversion circuit |
| CN107968566A (en) * | 2017-12-20 | 2018-04-27 | 上海艾为电子技术股份有限公司 | A kind of power-switching circuit |
| CN108206517A (en) * | 2018-03-08 | 2018-06-26 | 广州金升阳科技有限公司 | A kind of low cost inputs anti-overvoltage crowbar |
| CN110572086A (en) * | 2019-08-28 | 2019-12-13 | 珠海凯邦电机制造有限公司 | Motor drive circuit, motor and electrical equipment |
| CN111641199A (en) * | 2020-05-07 | 2020-09-08 | 中国科学院声学研究所 | Overvoltage protection device and method applied to submarine observation network connection box |
| CN111641199B (en) * | 2020-05-07 | 2021-12-28 | 中国科学院声学研究所 | Overvoltage protection device and method applied to submarine observation network connection box |
| CN112421594A (en) * | 2020-11-23 | 2021-02-26 | 深圳佑驾创新科技有限公司 | Input protection circuit and vehicle-mounted generator |
| CN112421594B (en) * | 2020-11-23 | 2023-02-28 | 深圳佑驾创新科技有限公司 | Input protection circuit and vehicle-mounted generator |
| CN113972623A (en) * | 2021-09-29 | 2022-01-25 | 中国兵器装备集团上海电控研究所 | Direct current surge suppression circuit based on NMOS pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151204 Address after: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee after: Shijiazhuang Guoyuo Electrnic Science & Technology Co., Ltd. Address before: 050035 No. 56, 3 Kunlun street, Shijiazhuang Development Zone, Hebei, China Patentee before: Shijiazhuang Guoyuo Electrnic Science & Technology Co., Ltd. Patentee before: Shenzhen Guoyao Electronics Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20180428 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |