CN206865354U - The Boost circuit of surge in a kind of suppression - Google Patents
The Boost circuit of surge in a kind of suppression Download PDFInfo
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- CN206865354U CN206865354U CN201720509289.9U CN201720509289U CN206865354U CN 206865354 U CN206865354 U CN 206865354U CN 201720509289 U CN201720509289 U CN 201720509289U CN 206865354 U CN206865354 U CN 206865354U
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Abstract
The Boost circuit of surge in a kind of suppression that the utility model is related to, including inductance L1, continued flow tube D2, switching tube V1, output capacitance C2, the inductance L1, continued flow tube D2 is series between positive source and circuit output end positive pole, described switching tube V1 one end is connected between inductance L1 and continued flow tube D2, the other end connects power cathode, the positive pole connection continued flow tube D2 of output capacitance C2 negative pole, output capacitance C2 negative pole connection power cathode, also include being parallel to inductance L1, continued flow tube D2 charging paths, the continued flow tube D2 positive poles are provided with controlling switch S1, the control terminal of the controlling switch S1 is connected with the signal output part of a control circuit, the charging paths include charging resistor R1.The utility model employs charging paths, and not only charging current is not passed through inductance L1 when upper electric, avoids inductance L1 magnetic bias even saturation, and do not influence the construction of major loop also, is advantageous to wiring and the layout of major loop.
Description
Technical field
It the utility model is related to a kind of Boost circuit, the Boost circuit of surge in more particularly to a kind of suppression.
Background technology
In the output end of Boost topology circuit, the electric capacity of larger capacity can be typically placed.When upper electric, input power leads to
Cross Boost inductance, fly-wheel diode produces to output capacitance charging, Boost inductance moment magnetic saturation in charge circuit
Very big dash current.If unconstrained, the harm such as dash current can cause supply side to trip, insurance is blown, serious
The semiconductor devices possibly even damaged in circuit.Meanwhile big dash current can also pollute to power network.
In small-power occasion, it is more at present suppressed using NTC thermistor is connected in the input side of power supply on surge it is electric
Stream, but this method power consumption is larger, and thermistor is from the hot cold conditions that returns to due to needing the time, thus after a loss of power
Thermistor can lose effect when upper electric again immediately.
In middle power, large-power occasions, at present frequently with a resistance and switching device (such as relay, controllable silicon or
The controllable devices such as MOSFET, IGBT) it is in parallel after, be connected between fly-wheel diode and output capacitance, made out by control circuit
Close device to be held off when upper electric, power supply can only charge to electric capacity by resistance, so just limit surge electricity
Switching device is opened in stream, then delay.This method still has certain shortcoming, for example, it is upper electric when charging current from Boost inductance streams
Cross, inductance can be made to produce certain magnetic bias it could even be possible to saturation, if now opening main switch, it is likely that produce very big
Electric current burns main switch.In large-power occasions typically using IGBT as switching device in parallel with a resistor, and IGBT has
Conduction voltage drop (about 3~5V), this pressure drop can be added in parallel resistance always, resistance persistent fever, there is certain damage to the life-span.
Utility model content
Main purpose of the present utility model is to solve technical problem of the prior art, there is provided one kind suppresses upper surge
Boost circuit.
To achieve the above object, the technical solution of the utility model is：
The Boost circuit of surge in a kind of suppression, including inductance L1, continued flow tube D2, switching tube V1, output capacitance C2,
The inductance L1, continued flow tube D2 are series between positive source and circuit output end positive pole, and the colelctor electrode of the switching tube V1 connects
It is connected between inductance L1 and continued flow tube D2, switching tube V1 emitter stages connection power cathode, the positive pole connection of the output capacitance C2
Continued flow tube D2 negative pole, output capacitance C2 negative pole connection power cathode, in addition to it is parallel to inductance L1, continued flow tube D2 charging
Branch road, is provided with controlling switch S1 between positive source and circuit output end positive pole, the control terminal of the controlling switch S1 with
The signal output part connection of one control circuit, the charging paths include charging resistor R1.
Further, the charging paths also include charging diode D1, the charging diode D1 and the charging resistor
R1 connects.
Further, output capacitance C2 output voltage detecting circuit, the signal of the output voltage detecting circuit are included
Output end is connected with the control circuit, and the output voltage detecting circuit includes resistance R5, resistance R6, the resistance R5, electricity
Hinder in parallel with the output capacitance C2 after R6 connects.
Further, in addition to input capacitance C1 and input capacitance C1 input voltage detection circuit, the input capacitance
C1 both ends connect positive source and power cathode, the signal output part of the input voltage detection circuit and the control respectively
Circuit connects, and the input voltage detection circuit includes resistance R3, resistance R4, after the resistance R3, resistance R4 series connection with it is described
Input capacitance C1 is in parallel.
Further, the PWM drive signal output end of the control circuit is connected with switching tube V1 grid.
Another technical scheme of the present utility model is：
The Boost circuit of surge in a kind of suppression, including inductance L1, switching tube V1, output capacitance C2, without inverse parallel
The switching tube V2 of diode, the inductance L1, switching tube V2 are series between positive source and circuit output end positive pole, described to open
The colelctor electrode for closing pipe V1 is connected between inductance L1 and switching tube V2, switching tube V1 emitter stage connection power cathode, described defeated
Go out electric capacity C2 positive pole connecting valve pipe V2 emitter stage, output capacitance C2 negative pole connection power cathode, in addition to be parallel to
Inductance L1, switching tube V2 charging paths, the grid of the switching tube V2 is connected with the signal output part of a control circuit, described
Charging paths include charging resistor R1.
To sum up content, the Boost circuit of surge, employs charging paths in a kind of suppression described in the utility model,
Not only charging current is not passed through inductance L1 when upper electric, avoids inductance L1 magnetic bias even saturation, and do not influence major loop also
Construction, be advantageous to wiring and the layout of major loop.By diode D1, charging paths are cut off automatically after normal operation, will not
The working condition of major loop is had an impact.Charging resistor R1 need not use the thermistors such as NTC, PTC, can effectively reduce into
This, and can play effective inhibitory action when being powered off in repetition.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model embodiment one；
Fig. 2 is the circuit diagram of the utility model embodiment two.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Embodiment one
As shown in figure 1, in a kind of suppression surge Boost circuit, it is main to include by inductance L1, continued flow tube D2, switch
The major loop of the Boost circuit of pipe V1, output capacitance C2 composition.Inductance L1, continued flow tube D2 are series at positive source and circuit is defeated
Go out between proper pole, switching tube V1 colelctor electrode is connected between inductance L1 and continued flow tube D2, switching tube V1 emitter stages connection electricity
Source negative pole, output capacitance C2 positive pole connection continued flow tube D2 negative pole, output capacitance C2 negative pole connection power cathode.
In the present embodiment, in addition to a charging paths, charging paths include charging diode D1, charging resistor R1.Fill
It is in parallel with inductance L1, continued flow tube D2 after electric diode D1, charging resistor R1 series connection.Positive source and circuit output end positive pole it
Between be provided with controlling switch S1, specifically, being that continued flow tube D2 negative poles are provided with controlling switch S1, controlling switch S1 control terminal
It is connected with the signal output part of a control circuit.
Output capacitance C2 sides are provided with output voltage detecting circuit, and output voltage detecting circuit includes resistance R5, resistance R6,
It is in parallel with the output capacitance C2 after resistance R5, resistance R6 series connection, signal output part and the control electricity of output voltage detecting circuit
Road connects.
Also include input capacitance C1, to detect input voltage, input capacitance C1 both ends connect respectively positive source and
Power cathode.Input voltage detection circuit is provided with input capacitance C1 sides, input voltage detection circuit includes resistance R3, resistance
, the signal output part of input voltage detection circuit and control in parallel with the input capacitance C1 after R4, resistance R3, resistance R4 series connection
Circuit connects.In the present embodiment, input capacitance C1 uses the less thin-film capacitor of capacity, will not produce very big impact electricity
Stream.
The PWM drive signal output end of control circuit is connected with switching tube V1 grid.
Initial in upper electricity, controlling switch S1 is off state, and input voltage passes through R1 pairs of charging diode D1, charging resistor
Output capacitance C2 charges, and by adjusting charging resistor R1 resistance size, can limit output capacitance C2 dash current.By filling
Electric branch road, not only charging current is not passed through inductance L1 when upper electric, avoids inductance L1 magnetic bias even saturation, and do not influence also to lead
The construction in loop, be advantageous to wiring and the layout of major loop.
Detect input voltage and output capacitance C2 voltage respectively by resistance R3, resistance R4, resistance R5, resistance R6, control
Circuit processed compares two voltages, when the voltage on output capacitance C2 reaches the 90% of input voltage, control circuit closure control
S1 is switched, and exports pwm control signal.The voltage suitable with input survey is established on output capacitance C2, and pwm signal uses
Delay startup is stepped up the mode of dutycycle, and output capacitance C2 will not also produce very big charging current.
After Boost circuit normal operation, by diode D1, charging paths are cut off automatically, and charging resistor R1 no longer disappears
Wasted work rate, the working condition of major loop will not also be had an impact.Charging resistor R1 need not use the temperature-sensitives such as NTC, PTC electricity
Resistance, can be significantly reduced costs, and can play effective inhibitory action when being powered off in repetition.
Surge suppressing method, comprises the following steps in a kind of Boost circuit：
Step 1: power supply electrifying, controlling switch S1 shut-offs；
Step 2: input voltage is charged by charging resistor R1 to output capacitance C2；
Step 3: when output capacitance C2 voltage reaches more than the 85% of input voltage, controlling switch S1 closures, at this
In embodiment, when output capacitance C2 voltage reaches the 90% of input voltage, controlling switch S1 closures, due to now exporting electricity
It is substantially suitable to hold C2 voltage and input voltage, thus larger rush of current will not be produced.Control circuit output PWM control letters
Number driving switch pipe V1 conducting, pwm control signal is stepped up dutycycle using delay startup, by way of soft start, enters one
Step suppresses dash current.Afterwards, Boost circuit normal operation.
Embodiment two
As shown in Fig. 2 in a kind of suppression surge Boost circuit, including inductance L1, switching tube V1, output capacitance C2,
Without the switching tube V2 of anti-paralleled diode.
Inductance L1, switching tube V2 are series between positive source and circuit output end positive pole, and switching tube V1 colelctor electrode connects
It is connected between inductance L1 and switching tube V2, switching tube V1 emitter stage connection power cathode.Output capacitance C2 positive pole connection is opened
Close pipe V2 emitter stage, output capacitance C2 negative pole connection power cathode.
In the present embodiment, in addition to a charging paths, charging paths are in parallel with inductance L1, switching tube V2, including charging
Diode D1, charging resistor R1.Switching tube V2 grid is connected with the signal output part of a control circuit.
Initial in upper electricity, switching tube V2 is off state, and input voltage is by charging diode D1, charging resistor R1 to defeated
Go out electric capacity C2 chargings, by adjusting charging resistor R1 resistance size, output capacitance C2 dash current can be limited.Pass through charging
Branch road, not only charging current is not passed through inductance L1 when upper electric, avoids inductance L1 magnetic bias even saturation, and do not influence also to lead back
The construction on road, be advantageous to wiring and the layout of major loop.
Detect input voltage and output capacitance C2 voltage respectively by resistance R3, resistance R4, resistance R5, resistance R6, control
Circuit processed compares two voltages, when the voltage on output capacitance C2 reaches the 90% of input voltage,
Control circuit output pwm control signal gives switching tube V1, meanwhile, the drive signal of control circuit output phase complements
Give switching tube V2.
After Boost circuit normal operation, by diode D1, charging paths are cut off automatically, and charging resistor R1 no longer disappears
Wasted work rate, the working condition of major loop will not also be had an impact.Charging resistor R1 need not use the temperature-sensitives such as NTC, PTC electricity
Resistance, can be significantly reduced costs, and can play effective inhibitory action when being powered off in repetition.
Surge suppressing method, comprises the following steps in a kind of Boost circuit：
Step 1: power supply electrifying, switching tube V2 shut-offs.
Step 2: input voltage is charged by charging resistor R1 to output capacitance C2.
Step 3: sending out switching tube V1, switching tube V2 PWM drive signal, pwm control signal is progressively increased using delay startup
Add dutycycle, by way of soft start, further suppress dash current, afterwards Boost circuit normal operation.
Compared with embodiment one, the present embodiment eliminates continued flow tube D2, reduces line drop, has simplified circuit.
As described above, the plan content with reference to given by accompanying drawing, can derive similar technical scheme.In every case it is not de-
From the content of technical solutions of the utility model, above example is made according to the technical essence of the utility model any simple
Modification, equivalent variations and modification, in the range of still falling within technical solutions of the utility model.
Claims (6)
1. the Boost circuit of surge in a kind of suppression, including inductance L1, continued flow tube D2, switching tube V1, output capacitance C2, institute
State inductance L1, continued flow tube D2 is series between positive source and circuit output end positive pole, the colelctor electrode connection of the switching tube V1
Between inductance L1 and continued flow tube D2, switching tube V1 emitter stages connection power cathode, the positive pole connection of the output capacitance C2 continues
Flow tube D2 negative pole, output capacitance C2 negative pole connection power cathode, it is characterised in that：Also include being parallel to inductance L1, afterflow
Pipe D2 charging paths, controlling switch S1, the controlling switch S1 are provided between positive source and circuit output end positive pole
Control terminal be connected with the signal output part of a control circuit, the charging paths include charging resistor R1.
2. the Boost circuit of surge in a kind of suppression according to claim 1, it is characterised in that：The charging paths
Also connected including charging diode D1, the charging diode D1 with the charging resistor R1.
3. the Boost circuit of surge in a kind of suppression according to claim 1, it is characterised in that：Also include output electricity
Hold C2 output voltage detecting circuit, the signal output part of the output voltage detecting circuit is connected with the control circuit, institute
Stating output voltage detecting circuit includes resistance R5, resistance R6, after the resistance R5, resistance R6 series connection with the output capacitance C2 simultaneously
Connection.
4. the Boost circuit of surge in a kind of suppression according to claim 1, it is characterised in that：Also include input electricity
Hold C1 and input capacitance C1 input voltage detection circuit, the both ends of the input capacitance C1 connect positive source and electricity respectively
Source negative pole, the signal output part of the input voltage detection circuit are connected with the control circuit, the input voltage measurement electricity
It is in parallel with the input capacitance C1 after connecting that road includes resistance R3, resistance R4, the resistance R3, resistance R4.
5. the Boost circuit of surge in a kind of suppression according to claim 1, it is characterised in that：The control circuit
PWM drive signal output end be connected with switching tube V1 grid.
6. the Boost circuit of surge in a kind of suppression, including inductance L1, switching tube V1, output capacitance C2, without inverse parallel two
The switching tube V2 of pole pipe, the inductance L1, switching tube V2 are series between positive source and circuit output end positive pole, the switch
Pipe V1 colelctor electrode is connected between inductance L1 and switching tube V2, switching tube V1 emitter stage connection power cathode, the output
Electric capacity C2 positive pole connecting valve pipe V2 emitter stage, output capacitance C2 negative pole connection power cathode, it is characterised in that：Also wrap
Include and be parallel to inductance L1, switching tube V2 charging paths, the grid of the switching tube V2 and the signal output part of a control circuit
Connection, the charging paths include charging resistor R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720509289.9U CN206865354U (en) | 2017-05-09 | 2017-05-09 | The Boost circuit of surge in a kind of suppression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720509289.9U CN206865354U (en) | 2017-05-09 | 2017-05-09 | The Boost circuit of surge in a kind of suppression |
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| Publication Number | Publication Date |
|---|---|
| CN206865354U true CN206865354U (en) | 2018-01-09 |
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ID=60823626
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720509289.9U Active CN206865354U (en) | 2017-05-09 | 2017-05-09 | The Boost circuit of surge in a kind of suppression |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712075A (en) * | 2018-06-21 | 2018-10-26 | 哈尔滨理工大学 | A kind of high-gain fuel cell car DC/DC transformer configurations and control method |
| 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 |
| CN117175925A (en) * | 2023-11-02 | 2023-12-05 | 深圳鹏城新能科技有限公司 | Anti-impact current soft-start direct-current power supply input circuit |
-
2017
- 2017-05-09 CN CN201720509289.9U patent/CN206865354U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108712075A (en) * | 2018-06-21 | 2018-10-26 | 哈尔滨理工大学 | A kind of high-gain fuel cell car DC/DC transformer configurations and control method |
| CN117175925A (en) * | 2023-11-02 | 2023-12-05 | 深圳鹏城新能科技有限公司 | Anti-impact current soft-start direct-current power supply input circuit |
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