CN207677628U - A kind of power circuit of high pressure resistant high-frequency percussion input - Google Patents
A kind of power circuit of high pressure resistant high-frequency percussion input Download PDFInfo
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- CN207677628U CN207677628U CN201721814982.3U CN201721814982U CN207677628U CN 207677628 U CN207677628 U CN 207677628U CN 201721814982 U CN201721814982 U CN 201721814982U CN 207677628 U CN207677628 U CN 207677628U
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- circuit
- input
- power
- preliminary filling
- power supply
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Abstract
The utility model provides a kind of power circuit of high pressure resistant high-frequency percussion input, belongs to power circuit field.The utility model includes safety circuit, filter circuit, discharge circuit, reverse-connection preventing circuit, power supply preliminary filling input circuit, wherein, the safety circuit input end connects power supply, the output end of the safety circuit is connected with filter circuit input terminal, the filter circuit output end is connected with discharge circuit input terminal, the discharge circuit output end is connected with reverse-connection preventing circuit input terminal, the reverse-connection preventing circuit output end is connected with power supply preliminary filling input circuit input terminal, and the output end of the power supply preliminary filling input circuit is power output end.The beneficial effects of the utility model are：Cope with from power input repeatedly with the impacting with high pressure of high frequency.
Description
Technical field
The utility model is related to a kind of power circuit more particularly to a kind of power circuits of high pressure resistant high-frequency percussion input.
Background technology
Typically, the requirement for inputting peripheral circuit has：The inhibition for inputting surge voltage, input surge electricity when electrifying startup
The limitation of stream meets use environment and externally harasses desired Electro Magnetic Compatibility and do not damage DC- in the case of input reverse-connection
The functions such as DC converters.But currently used surge restraint circuit, the poor ability of high frequency tolerant high pressure repeated impacts, if
Continually 750V voltages are impacted, and be easy to cause the damage of DC-DC converter.
The problem of circuit is because of input capacitance residual voltage at present, in the case of quick washing, what hardly possible of capacitance voltage exists
Short time lowers, and it is difficult the case where discerning whether to be truly present input voltage under-voltage under quick washing to cause power supply.It leads
The source of sending a telegraph always works at the corresponding state of minimum input voltage, and when high input voltage comes, there are no responses to come, from
And cause output voltage over-pressed.Very high metal-oxide-semiconductor stress spike is caused, it is exceeded so as to cause stress.Repeatedly with very high frequency
High pressure is inputted, relay can be caused to be attracted shutdown repeatedly, continuous Ground shock waves bring great impact to power circuit.If power supply
Output short-circuit may be led to by the above problem occur, cause input terminal electric current excessive, in some instances it may even be possible to cause fire, danger on fire.
Utility model content
To solve the problems of the prior art, the utility model provides a kind of power supply electricity of high pressure resistant high-frequency percussion input
Road.
The utility model includes safety circuit, filter circuit, discharge circuit, reverse-connection preventing circuit, power supply preliminary filling input circuit,
Wherein, the safety circuit input end connects power supply, and the output end of the safety circuit is connected with filter circuit input terminal, the filter
Wave circuit output end is connected with discharge circuit input terminal, and the discharge circuit output end is connected with reverse-connection preventing circuit input terminal, institute
It states reverse-connection preventing circuit output end with power supply preliminary filling input circuit input terminal to be connected, the output end of the power supply preliminary filling input circuit is
Power output end.
The utility model is further improved, further include accelerate input voltage decline the second discharge circuit, described second
Discharge circuit is in parallel with discharge circuit.
The utility model is further improved, and the second discharge circuit includes resistance R4, resistance R5 and second switch unit, institute
State resistance R4 it is in parallel with resistance R5 after with second switch unit contact.
The utility model is further improved, and the power supply preliminary filling input circuit includes first for controlling on/off
Switch unit.
The utility model is further improved, the power supply preliminary filling input circuit further include concatenated third switch unit and
Preliminary filling unit, the first switch unit are connected in parallel on concatenated third switch unit and preliminary filling unit both ends.
The utility model is further improved, and further includes controller, the first switch unit, second switch unit and
Three switch units are the relay being connected with controller, and the power circuit further includes being arranged in controller and each relay
Between the control unit that is attracted for controlling each relay, the preliminary filling unit is concatenated resistance R1 and resistance R2.
The utility model is further improved, and the power supply preliminary filling input circuit input terminal is additionally provided with for detecting voltage
Input voltage sample detecting circuit, the input voltage sample detecting circuit are connected with controller.
The utility model is further improved, and the safety circuit includes multiple concatenated safety capacitances, wherein safety electricity
The input termination power of appearance, the capacitance group output termination filter circuit.
The utility model is further improved, and the filter circuit includes filter capacitor C3 and EMC filter inductance L1 and L2,
The filter capacitor C3 connects the input terminal of the output end and EMC filter inductances L2 of EMC filter inductances L1 respectively.
The utility model is further improved, and the reverse-connection preventing circuit is diode D1, and the cathode of the diode D1 connects
Power supply preliminary filling input circuit input terminal.
Compared with prior art, the utility model has the beneficial effects that：It copes with repeatedly and high from power input
The impacting with high pressure of frequency；Have the function of preventing reversal connection；Input voltage measurement is filtered, High-frequency Interference is eliminated and is shaken
It swings；Input voltage repid discharge circuit is handled, it is ensured that input voltage measurement rapid decrease in the case of power down；It is attached in under-voltage point
Closely there is special discharge loop that input voltage is accelerated to decline, prevent from judging by accident and shakes.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model circuit diagram；
Fig. 3 is one or three relay control sequential figures of embodiment；
Fig. 4 is prior art power circuit metal-oxide-semiconductor Vds voltage change figures；
Fig. 5 is the utility model metal-oxide-semiconductor Vds voltage change figures.
Specific implementation mode
The utility model is described in further details with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model reply from power input repeatedly with the impacting with high pressure of high frequency, while also having
Prevent the function of reversal connection.Specifically, including safety circuit, filter circuit, discharge circuit, reverse-connection preventing circuit, power supply preliminary filling input
Circuit, wherein the safety circuit input end connects power supply, and the output end of the safety circuit is connected with filter circuit input terminal,
The filter circuit output end is connected with discharge circuit input terminal, the discharge circuit output end and reverse-connection preventing circuit input terminal phase
Even, the reverse-connection preventing circuit output end is connected with power supply preliminary filling input circuit input terminal, the power supply preliminary filling input circuit it is defeated
Outlet is power output end.Further include the second discharge circuit for accelerating input voltage to decline, second discharge circuit and electric discharge
Circuit in parallel.
As shown in Fig. 2, one embodiment as the utility model, this example further includes controller, second electric discharge of this example
Circuit includes resistance R4, resistance R5 and the second relay, and the second relay controls the connecting and disconnecting of the circuit of series resistance R4 and resistance R5.
Input voltage quick discharging circuit, it is ensured that input voltage measurement rapid decrease in the case of power down；In under-voltage point setting second
Discharge circuit increases input voltage fall off rate, prevents from judging by accident and shake.
The power supply preliminary filling input circuit includes the first relay for controlling on/off, further includes concatenated third
Relay and preliminary filling unit, first relay are connected in parallel on concatenated third relay and preliminary filling unit both ends.This example it is pre-
It is concatenated resistance R1 and resistance R2 to fill unit.
This example further includes that three line structures are identical, is separately positioned between controller and three relays each for controlling
The control unit that relay is attracted.Wherein, in circuit VDC+, VDC- be power supply input terminal；VDCIN+, VDCIN- are power supply
Output end；VCC, GND are the input terminal of signal power source, and RELAY1, RELAY2, RELAY3 are the control signal from controller；
The actuation and disconnection that relay is controlled the control signal of relay by controller, to control the input of power electricity and break
It opens.Three relay preliminary filling input circuits, each relay division of labor processing；Ensure during circuit malfunctions, preliminary filling resistance
It is not damaged, whens circuit malfunctions disconnects in time.
Safety circuit described in the safety circuit includes multiple concatenated safety capacitances, wherein the input terminal of safety capacitance
Connect power supply, the capacitance group output termination filter circuit.Specifically, this example safety circuit includes capacitance C1, capacitance C2, capacitance
C4, capacitance C7, wherein the capacitance C1 mono- terminates positive pole, the other end of another termination capacitor C2 of the capacitance C1, institute
A termination power cathode of capacitance C7 is stated, the one end another termination capacitor C4 of capacitance C7, the capacitance C2 and capacitance C4 are another
End ground connection.
The discharge circuit is 2 or more concatenated resistance, and concatenated resistance R3, resistance R6, resistance are arranged in this example
R7 discharges, and in order to accelerate the voltage of storage capacitor to release, this example is also additionally arranged resistance R4, R5, and passes through the short of RELAY2
It is temporarily attracted, connects circuit and accelerate electric discharge.
The filter circuit includes EMC (Electro Magnetic Compatibility) filter inductances L1, filter capacitor C3 and EMC filter inductance L2,
The filter capacitor C3 connects the input terminal of the output end and EMC filter inductances L2 of EMC filter inductances L1 respectively.The anti-reverse electricity
Road is that the cathode of diode D1, the diode D1 connect power supply preliminary filling input circuit input terminal.Input voltage measurement is filtered
Wave processing, eliminates High-frequency Interference and oscillation.
This example be easy to cause under-voltage under-voltage point in voltage i.e. this example power supply preliminary filling input circuit input terminal is additionally provided with
Input voltage sample detecting circuit for detecting voltage, the input voltage sample detecting circuit are connected with controller.It can
True output voltage is detected in real time, ensures voltage sample and virtual voltage zero error.
The operation principle of this example is：
1. preliminary filling process：When input voltage sample detecting circuit, voltage is detected more than input minimum voltage point and is held
Continuous time 400ms or more, third relay RLY3 is disconnected after being attracted third relay RLY3,150ms,
Third relay RLY3, which is attracted, starts timing, and the first relay RLY1 is attracted after 100ms；This logic can be effective
Avoiding Power supply belt from carrying, electric current is excessive to cause preliminary filling resistance to be burned；Third relay RLY3 can also be avoided to disconnect simultaneously, first
There are no occur the phenomenon that being attracted, lead to circuit instantaneous open circuit by relay RLY1；
2. shutdown process：When detecting that input voltage is near 200V, it is attracted the second relay RLY2 relays 10ms
After disconnect；When detection input voltage drops near 190V, the first relay RLY1 is turned off；It can be effectively prevented in this way
Under-voltage point nearby pours voltage suddenly, causes input voltage loop voltage how high.Cause power device voltage stress excessively high, and damages
It is bad.The controller of this example controls the control sequential of three relays as shown in Figure 3.
As shown in Figure 4 and Figure 5, this example is verified by the input voltage to metal-oxide-semiconductor, by the scheme of the prior art,
The spike of metal-oxide-semiconductor Vds voltages is much larger than 1000V, but by the utility model, it can be by metal-oxide-semiconductor Vds voltages most higher-dimension
It holds in 1000V.By the Vds spike stress comparison of metal-oxide-semiconductor before and after improvement as can be seen that by using the utility model solution party
After case, the voltage stress spike of metal-oxide-semiconductor is decreased obviously, almost without any stress spike.Illustrate, by the utility model, to appoint
What high frequency voltage impact will not all have an impact circuit, have relatively good " resisting " effect to high frequency voltage impact.
To sum up, the utility model using novel three relays preliminary filling processing scheme come special disposal from high-frequency and high-voltage not
Disconnected impact.This example is dedicated to efficiently input detection tension discharge circuit and unique electric discharge relay control logic, can be complete
The full impacting with high pressure for avoiding input voltage, makes power supply be not damaged during impact.It can simultaneously be effectively avoids sending out
Preliminary filling resistance is burned when raw failure and power device is affected, while can also be reduced and be attracted moment from relay
Heavy current impact.
The specific implementation mode of the above is the better embodiment of the utility model, and it is new not to limit this practicality with this
The specific implementation range of type, the scope of the utility model includes being not limited to present embodiment, all according to the utility model
Made by equivalence changes it is within the protection scope of the present utility model.
Claims (10)
1. a kind of power circuit of high pressure resistant high-frequency percussion input, it is characterised in that：Including safety circuit, filter circuit, electric discharge
Circuit, reverse-connection preventing circuit, power supply preliminary filling input circuit, wherein the safety circuit input end connects power supply, the safety circuit
Output end is connected with filter circuit input terminal, and the filter circuit output end is connected with discharge circuit input terminal, the electric discharge electricity
Road output end is connected with reverse-connection preventing circuit input terminal, the reverse-connection preventing circuit output end and power supply preliminary filling input circuit input terminal phase
Even, the output end of the power supply preliminary filling input circuit is power output end.
2. the power circuit of high pressure resistant high-frequency percussion input according to claim 1, it is characterised in that：Further include that acceleration is defeated
Enter the second discharge circuit of voltage decline, second discharge circuit is in parallel with discharge circuit.
3. the power circuit of high pressure resistant high-frequency percussion input according to claim 2, it is characterised in that：Second discharge circuit
Including resistance R4, resistance R5 and second switch unit, contact with second switch unit after the resistance R4 is in parallel with resistance R5.
4. the power circuit of high pressure resistant high-frequency percussion input according to claim 3, it is characterised in that：The power supply preliminary filling
Input circuit includes the first switch unit for controlling on/off.
5. the power circuit of high pressure resistant high-frequency percussion input according to claim 4, it is characterised in that：The power supply preliminary filling
Input circuit further includes concatenated third switch unit and preliminary filling unit, and the first switch unit is connected in parallel on concatenated third and opens
Close unit and preliminary filling unit both ends.
6. the power circuit of high pressure resistant high-frequency percussion input according to claim 5, it is characterised in that：Further include control
Device, the first switch unit, second switch unit and third switch unit are the relay being connected with controller, the electricity
Source circuit further includes that the control unit being attracted for controlling each relay is arranged between controller and each relay, described
Preliminary filling unit is concatenated resistance R1 and resistance R2.
7. the power circuit of high pressure resistant high-frequency percussion input according to claim 6, it is characterised in that：The power supply preliminary filling
Input circuit input terminal is additionally provided with the input voltage sample detecting circuit for detecting voltage, the input voltage sample detecting electricity
Road is connected with controller.
8. according to the power circuit of the high pressure resistant high-frequency percussion input of claim 1-7 any one of them, it is characterised in that：It is described
Safety circuit includes multiple concatenated safety capacitances, wherein the input termination power of safety capacitance, the capacitance group output termination
Filter circuit.
9. the power circuit of high pressure resistant high-frequency percussion input according to claim 8, it is characterised in that：The filter circuit
Including filter capacitor C3 and EMC filter inductance L1 and L2, the filter capacitor C3 connect respectively EMC filter inductances L1 output end and
The input terminal of EMC filter inductances L2.
10. according to the power circuit of the high pressure resistant high-frequency percussion input of claim 1-7 any one of them, it is characterised in that：Institute
It states the cathode that reverse-connection preventing circuit is diode D1, the diode D1 and connects power supply preliminary filling input circuit input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721814982.3U CN207677628U (en) | 2017-12-22 | 2017-12-22 | A kind of power circuit of high pressure resistant high-frequency percussion input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721814982.3U CN207677628U (en) | 2017-12-22 | 2017-12-22 | A kind of power circuit of high pressure resistant high-frequency percussion input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207677628U true CN207677628U (en) | 2018-07-31 |
Family
ID=62969807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721814982.3U Expired - Fee Related CN207677628U (en) | 2017-12-22 | 2017-12-22 | A kind of power circuit of high pressure resistant high-frequency percussion input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207677628U (en) |
-
2017
- 2017-12-22 CN CN201721814982.3U patent/CN207677628U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180731 Termination date: 20191222 |