CN206585319U - Anti-surging power circuit - Google Patents
Anti-surging power circuit Download PDFInfo
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- CN206585319U CN206585319U CN201720241699.XU CN201720241699U CN206585319U CN 206585319 U CN206585319 U CN 206585319U CN 201720241699 U CN201720241699 U CN 201720241699U CN 206585319 U CN206585319 U CN 206585319U
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- circuit
- power circuit
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- input
- surging
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Abstract
The utility model discloses a kind of Anti-surging power circuit, including ac input end, rectification circuit, booster circuit and Anti-surge resistor, and booster circuit includes boosting subelement and the first electric capacity；The input connection of ac input end and rectification circuit, first output end of rectification circuit is connected with the input for the subelement that boosts, the output end of subelement of boosting and the first end of Anti-surge resistor are connected, second end of Anti-surge resistor is connected with the positive pole of the first electric capacity, its connecting node is the output end of Anti-surging power circuit, the negative pole ground connection of the first electric capacity.Technical solutions of the utility model have the characteristics of low and low cost is lost.
Description
Technical field
The utility model is related to switch power technology field, more particularly to a kind of Anti-surging power circuit.
Background technology
The input circuit of Switching Power Supply uses capacitor filtering type rectification circuit mostly, because the initial voltage on filter capacitor is
Zero, in electric power starting moment, filter capacitor charging can produce very big electric current, and then cause circuit to burn out, and the electric current is wave
Gush electric current.To avoid surge current from burning out circuit, technical staff have developed Anti-surging power circuit.
Existing Anti-surging power circuit is as shown in figure 1, it includes rectification circuit, Anti-surge resistor R0 and booster circuit；
Wherein, booster circuit includes boosting subelement and output capacitance C0.In electric power starting moment, Anti-surge resistor R0 can limit filter
The size of ripple capacitance charging current.Also, the resistance of Anti-surge resistor is bigger, its Anti-surging effect is better.Due to Anti-surging
Resistance is arranged at boosting subelement prime, and the electric current for flowing through boosting subelement front stage circuits is general very big, therefore, shown in Fig. 1
Circuit has following two：
(1) Anti-surge resistor meeting consumed energy, circuit loss is big；
(2) it is circuit safety is worked, it is desirable to which the resistance of Anti-surge resistor is larger, and the resistance of Anti-surge resistor is bigger,
Its volume is also bigger, and cost is higher.
Utility model content
Main purpose of the present utility model is to provide a kind of Anti-surging power circuit, it is intended to reduce the Anti-surging power circuit
Loss and cost.
To achieve the above object, the utility model proposes Anti-surging power circuit, including ac input end, rectified current
Road, booster circuit and Anti-surge resistor, the booster circuit include boosting subelement and the first electric capacity；The ac input end with
The input connection of the rectification circuit, the first output end of the rectification circuit and the input of the boosting subelement connect
Connect, the output end of the boosting subelement is connected with the first end of the Anti-surge resistor, the second end of the Anti-surge resistor
It is connected with the positive pole of first electric capacity, its connecting node is the output end of the Anti-surging power circuit, first electric capacity
Negative pole ground connection.
Preferably, the boosting subelement includes the first inductance, the first diode and first switch pipe, first inductance
First end for it is described boosting subelement input, the second end of first inductance, the input of the first switch pipe
And the anode interconnection of first diode, the output head grounding of the first switch pipe, the negative electrode of first diode is
The output end of the boosting subelement.
Preferably, the Anti-surging power circuit also includes the second diode, the anode of second diode, described whole
First output end of current circuit and the interconnection of the first end of first inductance, the negative electrode of second diode, the described 1st
The first end interconnection of the negative electrode of pole pipe and the Anti-surge resistor.
Preferably, the Anti-surging power circuit also includes the second electric capacity, the first end of second electric capacity, the rectification
The anode interconnection of first output end of circuit, the first end of first inductance and second diode, second electric capacity
The second end ground connection.
Preferably, the Anti-surge resistor is negative tempperature coefficient thermistor.
Preferably, the rectification circuit is bridge rectifier.
Preferably, the first switch pipe is managed for N-MOS, and the drain electrode of the N-MOS pipes is the defeated of the first switch pipe
Enter end, the source electrode of the N-MOS pipes is the output end of the first switch pipe.
Because Anti-surge resistor is arranged between boosting subelement and the first electric capacity by technical solutions of the utility model, and flow
The electric current of boosted subelement late-class circuit is less than the electric current for flowing through boosting subelement front stage circuits.Accordingly, with respect to existing skill
Art, technical solutions of the utility model reduce loss and the cost of anti-surge circuit.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the electrical block diagram of Anti-surging power circuit in the prior art；
Fig. 2 is the electrical block diagram of the utility model Anti-surging power circuit first embodiment.
Drawing reference numeral explanation：
| Label | Title | Label | Title | Label | Title |
| 10 | Rectification circuit | D1 | First diode | C1 | First electric capacity |
| 20 | Booster circuit | D2 | Second diode | C2 | Second electric capacity |
| 21 | Boost subelement | Q1 | First switch pipe | L1 | First inductance |
| R | Anti-surge resistor |
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of the utility model protection.
If it is to be appreciated that the description for being related to " first ", " second " etc. in the utility model be only used for describe purpose, without
It is understood that to indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
At least one this feature can be expressed or be implicitly included to the feature of " first ", " second ".In addition, between each embodiment
Technical scheme can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, work as technical scheme
Combination occur it is conflicting or when can not realize it will be understood that the combination of this technical scheme is not present, also not in this practicality newly
Within the protection domain of type requirement.
The utility model proposes a kind of Anti-surging power circuit.
As shown in Fig. 2 in one embodiment, it is (as shown in Figure 2 that above-mentioned Anti-surging power circuit includes ac input end
P1, P2), rectification circuit 10, booster circuit 20 and Anti-surge resistor R, booster circuit 20 includes the electricity of boosting subelement 21 and first
Hold C1；Ac input end is connected with the input of rectification circuit 10, the first output end and the boosting subelement 21 of rectification circuit 10
Input connection, boosting subelement 21 output end be connected with Anti-surge resistor R first end, the second of Anti-surge resistor R
End is connected with the first electric capacity C1 positive pole, and its connecting node is the output end of Anti-surging power circuit, the first electric capacity C1 negative pole
Ground connection.
In the present embodiment, it is assumed that the input power of Anti-surging power circuit is PI, and input current is II, and input voltage is
UI；Power output is PO, and output current is IO, and output voltage is UO.
(1) if Anti-surge resistor R resistance is R, for Anti-surging power circuit of the prior art, wave resistance therein
The useless power for gushing resistance R consumption is II × II × R；
For the utility model proposes Anti-surging power circuit, the useless power of Anti-surge resistor R therein consumption is
IO×IO×R。
Due to PI >=PO, UI<UO.Therefore II>IO, II × II × R>IO×IO×R.Technical solutions of the utility model can
Reduce the loss of Anti-surging power circuit.
(2) if the safe current of Anti-surging power circuit is IT, IT<IO<II, will make the safe work of Anti-surging power circuit
Make, then, Anti-surge resistor R resistance in existing Anti-surging power circuit, more than the utility model proposes Anti-surging power supply
Anti-surge resistor R resistance in circuit.
Because Anti-surge resistor R resistances are bigger, volume is also bigger, and cost is also higher.Therefore, technical solutions of the utility model
The cost of Anti-surging power circuit can be reduced.
Here, Anti-surge resistor R is chosen as the resistance of resistance fixation, the electricity with negative temperature coefficient feature is also chosen as
Resistance.If it is understood that Anti-surge resistor R is the resistance of negative temperature coefficient feature, in Anti-surging power circuit by startup shape
During state is gradient to stable state, Anti-surge resistor R temperature is gradually risen, and resistance is gradually reduced.In this way, one can be entered
The loss of step reduction Anti-surging power circuit.
In addition, booster circuit 20 can have a variety of implementations, as long as boost function can be completed.The present embodiment with
Illustrated exemplified by the booster circuit 20 of BOOST frameworks.
Above-mentioned boosting subelement 21 includes the first inductance L1, the first diode D1 and first switch pipe Q1, the first inductance L1
First end for boosting subelement 21 input, the first inductance L1 the second end, first switch pipe Q1 input and first
Diode D1 anode interconnection, first switch pipe Q1 output head grounding, the first diode D1 negative electrode is boosting subelement 21
Output end.
In the Anti-surging power circuit course of work：
If first switch pipe Q1 is in the conduction state, the power supply that rectification circuit 10 is exported passes through the first inductance L1 to ground.
In the process, the first inductance L1 energy storage.
If first switch pipe Q1 is in cut-off state, the power supply that rectification circuit 10 is exported passes through the first inductance L1 and first
Diode D1 is that the first electric capacity C1 charges and exported.In the process, because the first inductance L1 discharges the energy stored before this, because
This, the output voltage of booster circuit 20 is higher than input voltage, and then realizes boost function.
Wherein, first switch pipe Q1 is chosen as metal-oxide-semiconductor or triode, it is preferred that first switch pipe Q1 manages for N-MOS,
And the drain electrode of N-MOS pipes is first switch pipe Q1 input, the source electrode of N-MOS pipes is first switch pipe Q1 output end, N-
The grid of metal-oxide-semiconductor is connected with pwm driver (not shown).Wherein, when pwm driver is used to control first switch pipe Q1 conductings
Between accounting so that reach control booster circuit 20 output voltage purpose.
It is noted that during in order to prevent that power circuit from starting, the first diode D1 is because of the impact by high current
Damage, in the present embodiment, be also additionally arranged the second diode D2.Specifically, the second diode D2 anode, the of rectification circuit 10
One output end and the interconnection of the first inductance L1 first end, the second diode D2 negative electrode, the first diode D1 negative electrode and wave resistance
Gush resistance R first end interconnection.
So, when power circuit is in starting state, because the second diode D2 impedance is less than the first inductance L1 and the
One diode D1 series impedance so that the power supply that rectification circuit 10 is exported is that the first electric capacity C1 fills by the second diode D2
Electricity.When power circuit is in steady-working state, because the output voltage of booster circuit 20 is higher than input voltage so that fall the
The voltage of two diode D2 anodes is less than to fall the voltage in the second diode D2 negative electrodes, the second diode D2 cut-offs, rectification circuit
The power supply of 10 outputs is charged by the first inductance L1 and the first diode D1 for the first electric capacity C1.
In addition, in the output effect in order to optimize Anti-surging power circuit, the present embodiment, being also additionally arranged for rectified current
The power supply that road 10 is exported carries out the second electric capacity C2 of High frequency filter.Specifically, the second electric capacity C2 first end, rectification circuit 10
First output end, the first inductance L1 first end and the second diode D2 anode interconnection, the second electric capacity C2 the second end ground connection.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
It is every under inventive concept of the present utility model, the equivalent structure made using the utility model specification and accompanying drawing content is become
Change, or directly/be used in other related technical fields indirectly and be included in scope of patent protection of the present utility model.
Claims (7)
1. a kind of Anti-surging power circuit, it is characterised in that including ac input end, rectification circuit, booster circuit and Anti-surging
Resistance, the booster circuit includes boosting subelement and the first electric capacity；
The ac input end is connected with the input of the rectification circuit, the first output end and the liter of the rectification circuit
The input connection of subelement is pressed, the output end of the boosting subelement is connected with the first end of the Anti-surge resistor, described
Second end of Anti-surge resistor is connected with the positive pole of first electric capacity, and its connecting node is defeated for the Anti-surging power circuit
Go out end, the negative pole ground connection of first electric capacity.
2. Anti-surging power circuit as claimed in claim 1, it is characterised in that the boosting subelement include the first inductance,
First diode and first switch pipe, the first end of first inductance are the input of the boosting subelement, described first
The anode interconnection at the second end of inductance, the input of the first switch pipe and first diode, the first switch pipe
Output head grounding, the negative electrode of first diode for the boosting subelement output end.
3. Anti-surging power circuit as claimed in claim 2, it is characterised in that the Anti-surging power circuit also includes second
Diode, the first end of the anode of second diode, the first output end of the rectification circuit and first inductance is mutual
Even, the first end interconnection of the negative electrode of second diode, the negative electrode of first diode and the Anti-surge resistor.
4. Anti-surging power circuit as claimed in claim 3, it is characterised in that the Anti-surging power circuit also includes second
Electric capacity, the first end of second electric capacity, the first output end of the rectification circuit, the first end of first inductance and described
The anode interconnection of second diode, the second end ground connection of second electric capacity.
5. the Anti-surging power circuit as described in claim 1-4 any one, it is characterised in that the Anti-surge resistor is negative
Temperature coefficient thermistor.
6. the Anti-surging power circuit as described in claim 1-4 any one, it is characterised in that the rectification circuit is bridge-type
Rectification circuit.
7. the Anti-surging power circuit as described in claim 2-4 any one, it is characterised in that the first switch pipe is N-
Metal-oxide-semiconductor, the drain electrode of the N-MOS pipes is the input of the first switch pipe, and the source electrode of the N-MOS pipes is opened for described first
Close the output end of pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720241699.XU CN206585319U (en) | 2017-03-13 | 2017-03-13 | Anti-surging power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720241699.XU CN206585319U (en) | 2017-03-13 | 2017-03-13 | Anti-surging power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206585319U true CN206585319U (en) | 2017-10-24 |
Family
ID=60112768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720241699.XU Expired - Fee Related CN206585319U (en) | 2017-03-13 | 2017-03-13 | Anti-surging power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206585319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104213A (en) * | 2020-07-26 | 2020-12-18 | 南京博兰得电能技术发展有限公司 | Surge current suppression circuit |
-
2017
- 2017-03-13 CN CN201720241699.XU patent/CN206585319U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104213A (en) * | 2020-07-26 | 2020-12-18 | 南京博兰得电能技术发展有限公司 | Surge current suppression circuit |
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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: 20171024 Termination date: 20210313 |