CN104578738B - A kind of DC current overshoots active restraints and method - Google Patents
A kind of DC current overshoots active restraints and method Download PDFInfo
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- CN104578738B CN104578738B CN201410854504.XA CN201410854504A CN104578738B CN 104578738 B CN104578738 B CN 104578738B CN 201410854504 A CN201410854504 A CN 201410854504A CN 104578738 B CN104578738 B CN 104578738B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention discloses a kind of DC current overshoot active restraints and method, it is that there is the physical characteristic for preventing current break based on inductance, two groups of active switched circuits are controlled with time base circuit, the mode being combined with inductance is realized and effectively suppresses the too big scheme of DC current overshoot, first one group of active power switch conduction is controlled with time base circuit, suppress the peak value that DC current is overshooted with the inductance of concatenation within the time period of conducting, after peak value suppresses, turn off series inductance and turn on another group of active power pipe so that supplying DC voltage keeps continuity to reduce inductance again works long hours the loss for bringing.Current over pulse can so be suppressed, unnecessary power consumption can be well reduced again, be truly realized imagination, also solve the unfavorable design problem that DC current overshoot is brought greatly.
Description
Technical field
The present invention relates to current control field, active restraints are overshooted more particularly, to a kind of DC current.
Background technology
In DC constant voltage power supply application, when being the very big system power supply of capacitive load, due to DC voltage on electricity
Charged to electric capacity, very big DC current can be produced to overshoot, this DC current overshoot value is up to and is several times as much as actually required electric current,
And this overshoot current duration is up to several milliseconds, or even a few tens of milliseconds.So prolonged big overshoot current is maintained, is deposited
In very big risk, the key element of reality electric loading and whole system is easily burned, and system fraction defective is increased.Directly
The capacitive load for flowing constant voltage source is big, and powered on moment necessarily causes the overshoot of the electric current of direct current, and this overshoot harm is larger, suppression
System is improper, easily causes systemic breakdown.
The content of the invention
In order to overcome the deficiencies in the prior art, present invention firstly provides a kind of DC current overshoot active restraints, energy
Enough reach and suppress the effect that DC current produces very big overshoot current in powered on moment.
A further object of the present invention is to propose that a kind of DC current overshoots active method for limiting, by making using the electricity of inductance
Stream is not mutated to realize suppressing the effect that DC current produces very big overshoot current in powered on moment.
To achieve these goals, the technical scheme is that：
A kind of DC current overshoots active restraints, the direct current overshoot current for suppressing power input load, including
First active switched circuit, overshoot current suppression circuit, the second active switched circuit and time base circuit；
Power supply connects the input of the first active switched circuit and the second active switched circuit, the first active switched circuit respectively
Output end connect the input of overshoot current suppression circuit, the output terminating load of overshoot current suppression circuit, time base circuit point
When drive the first active switched circuit and the second active switched circuit, the output terminating load of the second active switched circuit.
This restraining device application inductance has prevents electric current from the principle that is mutated, while being by the set of time of time base circuit
Equal to or more than the time that current over pulse is maintained, during this period of time, time base circuit promotes the first active switched circuit to turn on, and makes
Supplying DC electric current flows through overshoot current suppression circuit, during this period of time, DC current there will be no overshoot current very high,
DC current overshoot value is suppressed.Then and then time base circuit makes overshoot current suppression circuit be broken from control device, and
Simultaneously turn on the second active switched circuit so that direct current supply voltage continues to primary voltage work.And DC current can be stablized
Work, this sample device is just served and suppresses the effect that DC current produces very big overshoot current in powered on moment.
A kind of DC current overshoots active method for limiting, the direct current overshoot current for suppressing power input load, uses
Time base circuit controls one group of active power switch conduction, and suppressing DC current with the inductance of concatenation within the time period of conducting overshoots
Peak value, after peak value suppresses, turn off series inductance and turn on another group of active power and switch and cause supplying DC voltage
Keep continuity.
Compared with prior art, beneficial effects of the present invention are：Because direct current dash current is very high so that System risk
Height, hidden danger and negative effect are brought to product quality, and the present invention is targetedly designed can quickly suppress direct current overshoot electricity
The device of stream, improves the reliability of DC constant voltage modular power source powered on moment failure.The work of attendant is reduced indirectly
Amount.Be many one layer of protective barriers of the quality for ensureing product, be client secure trust use and reduce client and worry and all have
Positive effect.In terms of economic benefit, some crash rates are often reduced, can just save operating cost, reduce maintenance cost, improved
The reliability of product.The physical characteristic of this programme application inductance, with very low design cost, overcomes the direct current mistake for being difficult to suppress
Electric current is rushed, systematic entirety is guaranteed.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention.
Fig. 2 is circuit theory diagrams of the invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but embodiments of the present invention are not limited to this.
As Fig. 1, a kind of DC current overshoot active restraints, the direct current for suppressing power input load E overshoots electricity
Stream, including the first active switched circuit A, overshoot current suppression circuit B, the second active switched circuit C and time base circuit D；
Power supply connects the input of the first active switched circuit A and the second active switched circuit C, the first active switch electricity respectively
The output end of road A connects the input of overshoot current suppression circuit B, output the terminating load E, Shi Ji of overshoot current suppression circuit B
Circuit D timesharing drives the output termination of the first active switched circuit A and the second active switched circuit C, the second active switched circuit C
Load.
Such as Fig. 2, time base circuit D includes control chip U79, triode Q19, Q20, resistance R877, R879, R883, R881,
R96, R880, R882, R100, R878, electric capacity C854, C855, C24, power supply connect one end of charging capacitor C24, charging capacitor C24
The other end be grounded by resistance R96, another termination control chip U79 of charging capacitor C24, control chip U79 connects triode
The base stage of Q19, the colelctor electrode of triode Q19 connects power supply by resistance R877, and the emitter stage of triode Q19 is connect by resistance R879
Ground, the emitter stage of triode Q19 drives the first active switched circuit A；Control chip U79 also connects the base stage of triode Q20, three poles
The colelctor electrode of pipe Q20 connects power supply by resistance R883, and the emitter stage of triode Q20 is grounded by resistance R881, triode Q20's
Emitter stage drives the second active switched circuit C；Wherein triode Q19 is NPN type, and triode Q20 is positive-negative-positive.Control chip U79
The base stage of triode Q19 is connect by resistance R100, resistance R87 is in parallel with electric capacity C855, in parallel one terminates the base of triode Q19
Pole, other end ground connection；Control chip U79 connects the base stage of triode Q20 by resistance R880, and resistance R88 is in parallel with electric capacity C854,
In parallel one base stage for terminating triode Q20, other end ground connection；
Wherein R100, R878, C855 are the base drive resistance and electric capacity of Q19, and R878, C855 also function to the work of time delay
With R880, R882, C854 are the base drive resistance and electric capacity of Q20, and R882, C854 also function to the effect of time delay.
Overshoot current suppression circuit B is inductance L25, and the output end of the first active switched circuit A connects load by inductance L25
E；Inductance L25 is used for suppressing the very big dash current of DC current powered on moment generation, it is therefore prevented that the mutation of direct current dash current.
First active switched circuit A includes metal-oxide-semiconductor MOS38, MOS39 and the MOS40 and the first drive module that are connected in parallel,
The emitter stage of triode Q19 connects the grid of MOS38, MOS39 and MOS40 by the first drive module, MOS38, MOS39 and
The drain electrode of MOS40 connects power supply, and source electrode meets load E by inductance L25；
Second active switched circuit C includes metal-oxide-semiconductor MOS41, MOS42 and the MOS43 and the second drive module that are connected in parallel,
The emitter stage of triode Q20 connects the grid of MOS41, MOS42 and MOS43 by the second drive module, MOS41, MOS42 and
The drain electrode of MOS43 connects power supply, and source electrode meets load E.
First drive module includes resistance R84 and diode D33, and the two is connected in parallel, and the positive pole of diode D33 connects
The grid of MOS38, MOS39 and MOS40；Second drive module includes resistance R85 and diode D34, and the two is connected in parallel,
The positive pole of diode D34 connects the grid of MOS41, MOS42 and MOS43.
Resistance R84 and diode D33 constitutes the drive circuit of MOS38, MOS39, MOS40, and resistance R84 prevents from driving electricity
The fluctuation of pressure, and diode D33 is the grid repid discharge path of MOS38, MOS39, MOS40.Resistance R85 and diode D34
Constitute the drive circuit of MOS41, MOS42, MOS43, resistance R85 prevents the fluctuation of driving voltage, and diode D34 be MOS41,
The grid repid discharge path of MOS42, MOS43.
The present apparatus suppresses current peak when suppressing DC current and overshooting first with inductance L25, does not allow overshoot current peak value
It is too high, after suppression, inductance L25 is disconnected, another set power is opened in the loss for preventing inductance from being brought to control device at once
Pipe, accomplishes that nature switches, it is ensured that the continuity of direct current supply voltage.All these functions are all by time base circuit control realization.
As Fig. 2, electricity on VD12_1 mono- first charge to electric capacity C24, the charging interval is determined by electric capacity C24 and resistance R96,
When electric capacity C24 voltages increase gradually, the PIN2 of control chip U79 is constantly in high level, therefore the PIN3 of control chip U79 is
Low level, now triode Q19 is turned on because of base stage for low level, and triode Q20 ends.After triode Q19 conductings so that
VD12_1 voltages drive the grid of MOS38, MOS39, MOS40 by resistance R877, R879 partial pressure, this partial pressure so that MOS38,
MOS39, MOS40 are open-minded, and VD12_1 voltages are added on supported V D12_2 by after MOS38, MOS39, MOS40, inductance L25,
During this, VD12_1 powered on moment, the overshoot current of DC current is suppressed by inductance L25 so that DC current can not be mutated.
When electric capacity C24 both end voltages are set up, the PIN2 voltages of control chip U79 reach the half DC6V of VD12_1 voltages, control core
The PIN3 of piece U79 is changed into high level output at once so that the base stage of triode Q20 is turned in high level, and triode Q19 cuts
Only.Inductance L25 is disconnected, and reduces the loss of L25.After triode Q20 conductings so that VD12_1 voltages are by resistance R883, R881
Partial pressure, this partial pressure drives the gate pole of MOS41, MOS42, MOS43 so that MOS41, MOS42, MOS43 are open-minded, VD12_1 voltages warp
Supported V D12_2 is added in after crossing MOS41, MOS42, MOS43；During whole suppression overshoot current, VD12_1 is able to maintain that
Natural continuity.
The present invention has according to inductance prevents the physical characteristic of current break, and two groups of active switch electricity are controlled with time base circuit
Road, the mode being combined with inductance is realized and effectively suppresses the too big scheme of DC current overshoot, first controls one with time base circuit
Group active power switch conduction, the peak value that DC current is overshooted, peak value suppression are suppressed within the time period of conducting with the inductance of concatenation
After system, turn off series inductance and turn on another group of active power pipe so that supplying DC voltage keeps continuity and can drop
Low inductance works long hours the loss for bringing.Current over pulse can so be suppressed, unnecessary power consumption can be well reduced again,
Imagination is truly realized, the unfavorable design problem that DC current overshoot is brought greatly is also solved.
The implementation method of invention described above, is not intended to limit the scope of the present invention..It is any in this hair
Done modification, equivalent and improvement etc. within bright spiritual principles, should be included in claim protection of the invention
Within the scope of.
Claims (5)
1. a kind of DC current overshoot active restraints, load for suppressing power input（E）Direct current overshoot current, it is special
Levy and be, including the first active switched circuit（A）, overshoot current suppression circuit（B）, the second active switched circuit（C）With when base
Circuit（D）；
Power supply connects the first active switched circuit respectively（A）With the second active switched circuit（C）Input, the first active switch electricity
Road（A）Output end connect overshoot current suppression circuit（B）Input, overshoot current suppression circuit（B）Output terminating load
（E）, time base circuit（D）Timesharing drives the first active switched circuit（A）With the second active switched circuit（C）, the second active switch
Circuit（C）Output terminating load；
First active switched circuit（A）Including metal-oxide-semiconductor MOS38, MOS39 and MOS40 for being connected in parallel and the first drive module, three
The emitter stage of pole pipe Q19 connects the grid of MOS38, MOS39 and MOS40, MOS38, MOS39 and MOS40 by the first drive module
Drain electrode connect power supply, source electrode connects load by inductance L25（E）；
Second active switched circuit（C）Including metal-oxide-semiconductor MOS41, MOS42 and MOS43 for being connected in parallel and the second drive module, three
The emitter stage of pole pipe Q20 connects the grid of MOS41, MOS42 and MOS43, MOS41, MOS42 and MOS43 by the second drive module
Drain electrode connect power supply, source electrode connects load（E）.
2. DC current according to claim 1 overshoots active restraints, it is characterised in that the time base circuit（D）
Including control chip U79, triode Q19, Q20, resistance R877, R879, R883, R881, R96 and charging capacitor C24, power supply connect
One end of charging capacitor C24, the other end of charging capacitor C24 is grounded by resistance R96, another termination control of charging capacitor C24
Coremaking piece U79, control chip U79 connect the base stage of triode Q19, and the colelctor electrode of triode Q19 connects power supply, three by resistance R877
The emitter stage of pole pipe Q19 is grounded by resistance R879, and the emitter stage of triode Q19 drives the first active switched circuit（A）；Control
Chip U79 also connects the base stage of triode Q20, and the colelctor electrode of triode Q20 connects power supply, the hair of triode Q20 by resistance R883
Emitter-base bandgap grading is grounded by resistance R881, and the emitter stage of triode Q20 drives the second active switched circuit（C）；Wherein triode Q19 is
NPN type, triode Q20 is positive-negative-positive.
3. DC current according to claim 1 and 2 overshoots active restraints, it is characterised in that the overshoot current
Suppression circuit（B）It is inductance L25, the first active switched circuit（A）Output end load is connect by inductance L25（E）.
4. DC current according to claim 1 overshoots active restraints, it is characterised in that first drive module
Including resistance R84 and diode D33, the two is connected in parallel, and the positive pole of diode D33 connects the grid of MOS38, MOS39 and MOS40
Pole；
Second drive module includes resistance R85 and diode D34, and the two is connected in parallel, and the positive pole of diode D34 connects
The grid of MOS41, MOS42 and MOS43.
5. DC current according to claim 3 overshoots active restraints, it is characterised in that the time base circuit（D）
Also include resistance R880, R882, R100, R878 and electric capacity C854, C855；Control chip U79 connects triode by resistance R100
The base stage of Q19, resistance R878 is in parallel with electric capacity C855, and in parallel one terminates the base stage of triode Q19, other end ground connection；
Control chip U79 connects the base stage of triode Q20 by resistance R880, and resistance R882 is in parallel with electric capacity C854, one end in parallel
Connect the base stage of triode Q20, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410854504.XA CN104578738B (en) | 2014-12-29 | 2014-12-29 | A kind of DC current overshoots active restraints and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410854504.XA CN104578738B (en) | 2014-12-29 | 2014-12-29 | A kind of DC current overshoots active restraints and method |
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| Publication Number | Publication Date |
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| CN104578738A CN104578738A (en) | 2015-04-29 |
| CN104578738B true CN104578738B (en) | 2017-06-13 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338843C (en) * | 2001-12-27 | 2007-09-19 | 中兴通讯股份有限公司 | Slowly-starting circuit of power factor correction circuit and its control device |
| CN201967173U (en) * | 2011-03-18 | 2011-09-07 | 德州学院 | Soft-start computer-controlled microwave oven |
| CN103763837A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Switching circuit of lighting lamp |
| US8866345B1 (en) * | 2011-05-27 | 2014-10-21 | Shawn P. Wright | Electrical current managing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090021206A1 (en) * | 2007-07-17 | 2009-01-22 | Kuo-Lung Kuan | Motor soft start-up system |
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2014
- 2014-12-29 CN CN201410854504.XA patent/CN104578738B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338843C (en) * | 2001-12-27 | 2007-09-19 | 中兴通讯股份有限公司 | Slowly-starting circuit of power factor correction circuit and its control device |
| CN201967173U (en) * | 2011-03-18 | 2011-09-07 | 德州学院 | Soft-start computer-controlled microwave oven |
| US8866345B1 (en) * | 2011-05-27 | 2014-10-21 | Shawn P. Wright | Electrical current managing system |
| CN103763837A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Switching circuit of lighting lamp |
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| CN104578738A (en) | 2015-04-29 |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: Wei Chong group Limited by Share Ltd Address before: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |