CN208094184U - Current surge suppression circuit - Google Patents
Current surge suppression circuit Download PDFInfo
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- CN208094184U CN208094184U CN201820291389.3U CN201820291389U CN208094184U CN 208094184 U CN208094184 U CN 208094184U CN 201820291389 U CN201820291389 U CN 201820291389U CN 208094184 U CN208094184 U CN 208094184U
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Abstract
The utility model discloses a kind of current surge suppression circuit,Including first and second resistance,First and second capacitance,First and second metal-oxide-semiconductor,First,Second and third diode,Wherein 28V input voltages anode and 28V output voltage anodes,The anode of second capacitance and the connection of first resistor one end,The poles G of the first resistor other end and the first metal-oxide-semiconductor,The poles G of second metal-oxide-semiconductor,The cathode of first diode,The anode connection of the cathode of third diode and the first capacitance,28V input voltages negative terminal is connect with the poles D of the first metal-oxide-semiconductor,The cathode of the poles S and the first capacitance of first metal-oxide-semiconductor,The anode of second diode,The poles S of the anode of third diode and the second metal-oxide-semiconductor connect,The anode of first diode is connect with one end of the cathode of the second diode and second resistance,The poles D of the other end of second resistance and the second metal-oxide-semiconductor,The cathode and 28V output voltage negative terminals of second capacitance connect.
Description
【Technical field】
The utility model belongs to aviation electronics engineering field, particularly relates to current surge suppression circuit.
【Background technology】
To realize the EMC performances of electrical equipment, the filtering that equipment power input interface generally use is made of inductance, capacitance
Device；Different size of filter capacitor can be also added in input terminal in internal secondary power supply；Equipment can when in order to meet instant power-down
The demand of normal work need to be added in its input terminal using storage capacitor as the holding circuit of core；Secondary power supply DC-DC conversion electricity
There is also capacitive devices for road input terminal, are usually expressed as capacitive characteristics on startup.It is exactly in device power to power on surge current
When generate when charging to filter capacitor, capacitive device or circuit.If the change rate to charging voltage is not controlled, in electricity
Caused rush of current will be very big in road.
Excessive surge current can generate system certain harmfulness.First, power on surge current it is excessive when can be to machine
The selection of upper power circuit breaker causes prodigious trouble, when should guarantee to bear prodigious dash current and ensureing overload again
It can normally fuse.Secondly, powering on surge current and cross conference causes input voltage waveform to distort, and influences other airborne electricity in parallel
The work of sub- equipment can exceed that system total power causes system to start failure when serious.
In view of the harmfulness of surge current, the power reguirements of certain more advanced model aircrafts make surge current
It requires.Therefore, the problem of must being faced when how limit inrush currents have become air environment design.
【Utility model content】
The purpose of this utility model is to provide a kind of current surge suppression circuits, to solve surge current to circuit system
System, which is led to the problem of, to be endangered.
To achieve the above object, the current surge suppression circuit for implementing the utility model include first resistor, second resistance,
First capacitance, the second capacitance, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first diode, the second diode, third diode, wherein
28V input voltages anode is connect with 28V output voltages anode, the anode of the second capacitance and first resistor one end, and first resistor is another
The poles G of one end and the first MOS pipes, the poles G of the second metal-oxide-semiconductor, the cathode of the first diode, third diode cathode and first
The anode connection of capacitance, 28V input voltages negative terminal are connect with the poles D of the first metal-oxide-semiconductor, the poles S and the first capacitance of the first metal-oxide-semiconductor
The poles the S connection of cathode, the anode of the second diode, the anode of third diode and the second metal-oxide-semiconductor, the anode of the first diode with
The poles D, the second electricity of the cathode of second diode and one end connection of second resistance, the other end of second resistance and the second metal-oxide-semiconductor
The cathode and 28V output voltage negative terminals of appearance connect.
Preferably, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-channel controller.
Preferably, the second capacitance is equivalent load capacitance.
Preferably, changing amplitude and the duration of surge current by adjusting the resistance value of first resistor.
Compared with prior art, implement the surge restraint circuit of the utility model proves there is inhibition two through experiment test
Secondary source powers on the function of surge current, effectively reduces the influence to nose aircraft power supply when electrical equipment starts.
Meanwhile the surge restraint circuit also achieves the function of reverse power connection protection.
【Description of the drawings】
Fig. 1 is the circuit diagram for the current surge suppression circuit for implementing the utility model.
【Specific implementation mode】
Refering to Figure 1, for the circuit diagram of current surge suppression circuit.The current surge suppression circuit includes the
One resistance R1, second resistance R2, the first capacitance C1, the second capacitance C2, the first metal-oxide-semiconductor V1, the second metal-oxide-semiconductor V2, the first diode
V3, the second diode V4, third diode V5.Wherein 28V input voltages anode and 28V output voltages anode, the second capacitance C2
Anode and the connection of the one end first resistor R1, the poles G of the first resistor R1 other ends and the first metal-oxide-semiconductor V1, the G of the second metal-oxide-semiconductor V2
The anode connection of pole, the cathode of the first diode V3, the cathode of third diode V5 and the first capacitance C1,28V input voltages are negative
End is connect with the poles D of the first metal-oxide-semiconductor V1, the cathode of the poles S of the first metal-oxide-semiconductor V1 and the first capacitance C1, the second diode V4
The poles S of anode, the anode of third diode V5 and the second metal-oxide-semiconductor V2 connect, the anode and the second diode of the first diode V3
One end connection of the cathode and second resistance R2 of V4, the poles D, the second capacitance of the other end of second resistance R2 and the second metal-oxide-semiconductor V2
The cathode and 28V output voltage negative terminals of C2 connects.
Wherein first resistor R1, the first capacitance C1 and third diode V5 form capacitor charging circuit, second resistance R2, the
One diode V3 and the second diode V4 forms quick-charging circuit, the first metal-oxide-semiconductor V1 and the second metal-oxide-semiconductor V2 and is controlled for N-channel
Device, the second capacitance C2 are equivalent load capacitance.
When powering on, the first capacitance C1 and the second capacitance C2 both end voltages are 0, and the second metal-oxide-semiconductor V2 is in cut-off state, the poles D
Voltage between the poles S is 28V.After the power is turned on, 28V input powers pass through the first resistor R1 first passages constituted and the second capacitance
The second channel that C2, second resistance R2, the first diode V3 are constituted is to the first capacitance C1 chargings.With the first both ends capacitance C1 electricity
The rising of pressure, due to the clamped effect of the second diode V4, the first reverse-biased cut-offs of diode V3, the second charge tunnel is closed, the
The charging rate of one capacitance C1 is slack-off.As the first capacitance C1 both end voltages are further up, the second metal-oxide-semiconductor V2 is gradually turned on leakage
Source voltage VDS is gradually reduced, and circuit output voltage gradually increases, to reach the mesh of control surge current rate of change and amplitude
, realize the effective inhibition for powering on surge current.
The amplitude of surge current and duration depend on the charging of first the first capacitance of charge tunnel pair C1.If surge
Electric current cannot be satisfied design requirement, can by adjusting the resistance value of first resistor R1 come adjust surge current amplitude and it is lasting when
Between.The presence of second charge tunnel reduces the 2nd MOS pipes V2 and deletes source voltage from 0V to the time of cut-in voltage VGS (TH), can
To shorten the available machine time of electrical equipment.
When 28V input voltage reverse connections, the first metal-oxide-semiconductor V1 has ended anti-reverse effect.
Compared with prior art, the surge restraint circuit is through experiment test：Proving to have inhibits secondary power supply to power on wave
The function of gushing electric current effectively reduces the influence to nose aircraft power supply when electrical equipment starts.Meanwhile the surge presses down
Circuit processed also achieves the function of reverse power connection protection.
In the secondary power supply of Avionic Products, with the surge restraint circuit can make product meet GJB181,
The related specification requirement of power supply characteristic in DO160.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (4)
1. a kind of current surge suppression circuit, it is characterised in that：The current surge suppression circuit includes first resistor, the second electricity
Resistance, the first capacitance, the second capacitance, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first diode, the second diode, third diode,
Middle 28V input voltages anode is connect with 28V output voltages anode, the anode of the second capacitance and first resistor one end, first resistor
The poles G of the other end and the first metal-oxide-semiconductor, the poles G of the second metal-oxide-semiconductor, the cathode of the first diode, third diode cathode and first
The anode connection of capacitance, 28V input voltages negative terminal are connect with the poles D of the first metal-oxide-semiconductor, the poles S and the first capacitance of the first metal-oxide-semiconductor
The poles the S connection of cathode, the anode of the second diode, the anode of third diode and the second metal-oxide-semiconductor, the anode of the first diode with
The poles D, the second electricity of the cathode of second diode and one end connection of second resistance, the other end of second resistance and the second metal-oxide-semiconductor
The cathode and 28V output voltage negative terminals of appearance connect.
2. current surge suppression circuit as described in claim 1, it is characterised in that：First metal-oxide-semiconductor and the second metal-oxide-semiconductor are N ditches
Track control unit.
3. current surge suppression circuit as described in claim 1, it is characterised in that：Second capacitance is equivalent load capacitance.
4. current surge suppression circuit as described in claim 1, it is characterised in that：Change by adjusting the resistance value of first resistor
The amplitude of surge current and duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820291389.3U CN208094184U (en) | 2018-03-01 | 2018-03-01 | Current surge suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820291389.3U CN208094184U (en) | 2018-03-01 | 2018-03-01 | Current surge suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208094184U true CN208094184U (en) | 2018-11-13 |
Family
ID=64061265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820291389.3U Active CN208094184U (en) | 2018-03-01 | 2018-03-01 | Current surge suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208094184U (en) |
-
2018
- 2018-03-01 CN CN201820291389.3U patent/CN208094184U/en active Active
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