CN108471229A - A kind of surge restraint circuit of double closed loops - Google Patents
A kind of surge restraint circuit of double closed loops Download PDFInfo
- Publication number
- CN108471229A CN108471229A CN201810413135.9A CN201810413135A CN108471229A CN 108471229 A CN108471229 A CN 108471229A CN 201810413135 A CN201810413135 A CN 201810413135A CN 108471229 A CN108471229 A CN 108471229A
- Authority
- CN
- China
- Prior art keywords
- error amplifier
- hysteresis comparator
- pole double
- voltage
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
Abstract
The invention discloses a kind of surge restraint circuits of double closed loops, it is intended to which high to improve production cost existing for available circuit, occupancy volume is big, is unfavorable for the problems such as on-board circuitry refines demand.Technical key point of the present invention includes：One DC power supply, an inductance, a capacitance, a field-effect tube, an error amplifier, a single pole double throw analog switch and a hysteresis comparator；The output end of the error amplifier is connected with the grid of the field-effect tube, meanwhile, it is input to the input terminal of the hysteresis comparator；The positive input input control reference voltage of the error amplifier, the negative input of the error amplifier are connected with the common end that the single pole double throw analog switchs；The contact 1 and contact 2 of the single pole double throw analog switch are connected with sample rate current and voltage respectively；The output end of the hysteresis comparator is the voltage swing that is exported according to the error amplifier to select the conducting of the single pole double throw analog switch contact.
Description
Technical field
The invention belongs to aeronautical power generation technical field of electronic control, are related to a kind of surge restraint circuit, more particularly to a kind of
The surge restraint circuit of double closed loops.
Background technology
The power supply unit of existing airborne high-power transmitter, generally use DC power-supply circuit, wherein DC power supply can be by
It is provided after the airborne rectified transformation of alternating current, inductance, capacitance and field-effect tube is in series in power supply circuit.Inductance and capacitance composition
Filter accesses DC power supply through field-effect tube, and the connection of filter rear class loads, by the break-make of control, switchable load
Power supply.
To adapt to high-power fluctuation of the transmitter in impulse ejection, the capacitance of capacitance is usually very big, this can quickly hold
Prodigious surge current is caused when logical field-effect tube, leads to poor compatibility of powering, even results in blown fuse.In order to inhibit this
One surge current, is typically based on the negative-feedback that error amplifier constitutes electric current, and closed-loop control is carried out to starting current.This technology
It is the information input error amplifier by target current and actual current, with the grid of amplified error de-regulation field-effect tube
Voltage, to realize the closed-loop control of electric current.
Meanwhile after loading normal power supply, power supply is generating GJB181《Aircraft electrical supply parameters》The normal over-pressed wink of defined
When change, load can be made to bear surge voltage, easily lead to its damage.In order to inhibit this surge voltage, it is typically based on error amplification
Device constitutes the negative-feedback of voltage, and closed-loop control is carried out to output voltage.This technology is the letter by target voltage and virtual voltage
Error originated from input amplifier is ceased, with the grid voltage of amplified error de-regulation field-effect tube, to realize the closed loop control of voltage
System.
It in the prior art, need to be independent using one group respectively in order to realize the closed-loop control of above-mentioned electric current and voltage simultaneously
Field-effect tube and error amplifier.The design of such double closed loop control circuits, due to being unable to common parts, production cost
Height, occupancy volume is big, is unfavorable for the demand of on-board circuitry fining.
Invention content
The technical problem to be solved by the present invention is to：In view of the above problems, a kind of wave of double closed loops is provided
Suppression circuit is gushed, field-effect tube and error amplifier can be shared, while realizing the closed-loop control of starting current and surge voltage,
Production cost is saved, occupancy is small, and airborne power supply circuit is made more to refine.
The technical solution adopted by the present invention is as follows：
Including a DC power supply, an inductance, a capacitance, a field-effect tube, an error amplifier, a list
Dpdt double-pole double-throw (DPDT) analog switch and a hysteresis comparator；The cathode of the DC power supply is connected with the source electrode of the field-effect tube
Ground；The inductance and the capacitance that the anode of the DC power supply is concatenated are connected with the drain electrode of the field-effect tube；It is described
The output end of error amplifier is connected with the grid of the field-effect tube, meanwhile, it is input to the input terminal of the hysteresis comparator；
The positive input input control reference voltage of the error amplifier, the negative input of the error amplifier and the list
The common end of dpdt double-pole double-throw (DPDT) analog switch is connected；The contact 1 of the single pole double throw analog switch is connected with sample rate current, the hilted broadsword
The contact 2 of double-throw analog switch is connected with sampled voltage；The output end of the hysteresis comparator is according to the error amplifier
The voltage swing of output selects the conducting of the single pole double throw analog switch contact.
Further, the field-effect tube is the power MOS pipe of N-channel enhancing.
Further, the sample rate current is the charging current of the capacitance, and the sampled voltage is the voltage of the capacitance.
Further, it is preset with the fiducial value with certain section on the hysteresis comparator, when the error amplifier is defeated
Enter to the hysteresis comparator input terminal voltage be less than the hysteresis comparator on preset lower fiducial value when, the stagnant ring ratio
Compared with the contact 1 that the single pole double throw analog switch is connected in the output end of device, the closed-loop control of starting current is constituted.
Further, it is preset with the fiducial value with certain section on the hysteresis comparator, when the error amplifier is defeated
Enter to the hysteresis comparator input terminal voltage be more than the hysteresis comparator on preset upper fiducial value when, the stagnant ring ratio
Compared with the contact 2 that the single pole double throw analog switch is connected in the output end of device, the closed-loop control of surge voltage is constituted.
Further, the concatenated inductance and the capacitance form filter, for being carried out to the surge restraint circuit
Filtering.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The present invention devises double closed loop control circuits of starting current and surge voltage, independent by sharing same group
Field-effect tube and error amplifier, have effectively achieved the inhibition function of surge current and surge voltage.Due to field-effect tube
Internal resistance it is smaller, not only effectively reduce power attenuation when steady operation, also act the protective effect of short circuit load, together
When, the present invention is more succinct effective compared to the prior art, reduces production cost, occupancy is small, makes airborne power supply circuit
More refine.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 show the surge restraint circuit schematic diagram of double closed loops of the invention；
Fig. 2 show the surge restraint circuit simulation waveform of double closed loops of the invention；
It is marked in figure：
Vdc is DC power supply；L is inductance；C is capacitance；Q is field-effect tube；U is error amplifier；Vref is control ginseng
Examine voltage；K is single pole double throw analog switch；1 is single pole double throw analog switch contact 1；2 be single pole double throw analog switch contact 2；
Com is hysteresis comparator；I is sample rate current；V is sampled voltage.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
Embodiment 1：
The present invention provides a kind of surge restraint circuit of double closed loops, preferred embodiment is as shown in Figure 1.Including one
A DC power supply Vdc, an inductance L, a capacitance C, a field-effect tube Q, an error amplifier U, a single-pole double throw
An analog switch K and hysteresis comparator Com；The cathode of the DC power supply Vdc is connected with the source electrode of the field-effect tube Q
Ground；The drain electrode phase for the inductance L and the capacitance C and the field-effect tube Q that the anode of the DC power supply Vdc is concatenated
Even；The output end of the error amplifier U is connected with the grid of the field-effect tube Q, meanwhile, it is input to the hysteresis comparator
The input terminal of Com；The positive input input control reference voltage Vref of the error amplifier U, the error amplifier U's
Negative input is connected with the common end of the single pole double throw analog switch K；The contact 1 of the single pole double throw analog switch K with
Sample rate current i is connected, and the contact 2 of the single pole double throw analog switch K is connected with sampled voltage v；The hysteresis comparator Com's
Output end is the voltage swing that is exported according to the error amplifier U to select leading for the contacts single pole double throw analog switch K
It is logical；
The sample rate current is the charging current of the capacitance, and the sampled voltage is the voltage of the capacitance；It is described stagnant
It is preset with the fiducial value with certain section on ring comparator Com, when the error amplifier U is input to the hysteresis comparator
When the voltage of Com input terminals is less than preset lower fiducial value on the hysteresis comparator Com, the hysteresis comparator Com's is defeated
The contact 1 of the single pole double throw analog switch K is connected in outlet, constitutes the closed-loop control of starting current；As the error amplifier U
Be input to the hysteresis comparator Com input terminals voltage be more than the hysteresis comparator Com on preset upper fiducial value when, institute
The contact 2 of the single pole double throw analog switch K is connected in the output end for stating hysteresis comparator Com, constitutes the closed loop control of surge voltage
System.The field-effect tube Q is the power MOS pipe of N-channel enhancing；The concatenated inductance L and capacitance C forms filter,
For being filtered to the surge restraint circuit.
Above-mentioned surge restraint circuit devises double closed loop control circuits of starting current and surge voltage, by sharing
Same group of independent field-effect tube Q and error amplifier U, has effectively achieved the inhibition function of surge current and surge voltage.
Since the internal resistance of field-effect tube Q is smaller, power attenuation when steady operation is not only effectively reduced, short circuit load is also acted
Protective effect, meanwhile, it is more succinct compared to the prior art effectively to reduce production cost, occupy small, make airborne confession
Circuit more refines.
Embodiment 2：
On the basis of the present embodiment is the preferred embodiment described in embodiment 1 to circuit actual implementation application of the present invention make into
One step explanation.
It is as follows that design parameter configuration is carried out on the basis of the embodiment of the present invention 1：
1) rated voltage of DC power supply Vdc is 270V, surge voltage 440V/100ms；
2) capacitance of capacitance C is 2000uF, and startup charging current is 2A, and it is 330V that output, which inhibits voltage,；
3) control reference voltage Vref is 5V, and corresponding current detecting coefficient is 5V/2A, and voltage detecting coefficient is 5V/
330V；
4) lower threshold of hysteresis comparator Com is 2V, upper threshold 6V.
In one particular embodiment of the present invention, the operation principle of surge restraint circuit of the present invention is as follows：
1) in startup stage, the output voltage of error amplifier U is relatively low, is less than preset lower ratio on hysteresis comparator Com
Compared with value.At this point, hysteresis comparator Com output low levels, the 1 put-into error amplifier U of contact of single pole double throw analog switch K, from
And constitute the closed-loop control of starting current.In this stage, control circuit can control field-effect tube Q and be operated in linear zone, realize
DC power supply Vdc carries out constant-current charge to capacitance C.
2) after the voltage of capacitance C is gradually filled with, charging current is also gradually reduced, the output voltage of error amplifier U compared with
Height is more than preset upper fiducial value on hysteresis comparator Com.At this point, field-effect tube Q is transferred to saturation conduction by linear working state
State, while hysteresis comparator Com being made to be outputted to high level, 2 put-into error of contact of control single pole double throw analog switch K
Amplifier U, to constitute the closed-loop control of surge voltage.In this stage, when DC power supply Vdc generates overvoltage surge, accidentally
The output of poor amplifier U can be reduced quickly, so that field-effect tube Q is fallen back on linear zone from saturation region, born extra voltage, to inhibit
The voltage of capacitance C rises.Lower fiducial value of the output of the error amplifier U of reduction still greater than hysteresis comparator Com, because without
Lead to the switching of analog switch.
3) when the switch of the power failure of DC power supply Vdc or external control signal shutdown field-effect tube Q, capacitance C passes through
Load discharge declines, then 2 voltage of contact of single pole double throw analog switch K can be caused to decline, the output of triggering hysteresis comparator Com
Overturning, single pole double throw analog switch K resets to 1 current closed-loop feedback states of contact, to return to original state.
As can be seen that the above-mentioned closed-loop control for 1) being respectively completed starting current and surge voltage with 2) two stages, profit
With same group of field-effect tube Q and error amplifier U, the Surge suppression function of double closed loops is realized, compared to the prior art,
Circuit design is more succinct, reduces production cost, reduces the occupancy volume in airborne equipment.
In one particular embodiment of the present invention, the simulation waveform of surge restraint circuit of the present invention is as shown in Figure 2.It can
To find out, when closed-loop current control, capacitance voltage is in constant-current charge area linear rise；When voltage close loop controls, capacitance voltage exists
Voltage inhibition zone, which is stablized, is inhibiting voltage magnitude.
As can be seen, double closed loop surge restraint circuits of the invention independently realize starting current closed-loop control and wave
Voltage close loop control is gushed, the surge of electric current and voltage can be effectively inhibited.
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (6)
1. a kind of surge restraint circuit of double closed loops, it is characterised in that：Including a DC power supply, an inductance, one
Capacitance, a field-effect tube, an error amplifier, a single pole double throw analog switch and a hysteresis comparator；It is described straight
The cathode in galvanic electricity source is connected ground connection with the source electrode of the field-effect tube；The inductance that the anode of the DC power supply is concatenated and
The capacitance is connected with the drain electrode of the field-effect tube；The grid phase of the output end of the error amplifier and the field-effect tube
Even, meanwhile, it is input to the input terminal of the hysteresis comparator；The positive input input control of the error amplifier is with reference to electricity
Pressure, the negative input of the error amplifier are connected with the common end that the single pole double throw analog switchs；The single-pole double throw
The contact 1 of analog switch is connected with sample rate current, and the contact 2 of the single pole double throw analog switch is connected with sampled voltage；It is described
The output end of hysteresis comparator is the voltage swing that is exported according to the error amplifier to select the single pole double throw analog to open
Close the conducting of contact.
2. a kind of surge restraint circuit of double closed loops according to claim 1, it is characterised in that：The field-effect tube
For the power MOS pipe of N-channel enhancing.
3. a kind of surge restraint circuit of double closed loops according to claim 1, it is characterised in that：The sample rate current
For the charging current of the capacitance, the sampled voltage is the voltage of the capacitance.
4. a kind of surge restraint circuit of double closed loops according to claim 1, it is characterised in that：The stagnant ring compares
The fiducial value with certain section is preset on device, when the error amplifier is input to the electricity of the hysteresis comparator input terminal
When pressure is less than preset lower fiducial value on the hysteresis comparator, the single-pole double throw is connected in the output end of the hysteresis comparator
The contact 1 of analog switch, constitutes the closed-loop control of starting current.
5. a kind of surge restraint circuit of double closed loops according to claim 1, it is characterised in that：The stagnant ring compares
The fiducial value with certain section is preset on device, when the error amplifier is input to the electricity of the hysteresis comparator input terminal
When pressure is more than preset upper fiducial value on the hysteresis comparator, the single-pole double throw is connected in the output end of the hysteresis comparator
The contact 2 of analog switch, constitutes the closed-loop control of surge voltage.
6. a kind of surge restraint circuit of double closed loops according to claim 1, it is characterised in that：The concatenated electricity
Sense and the capacitance form filter, for being filtered to the surge restraint circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413135.9A CN108471229B (en) | 2018-05-03 | 2018-05-03 | Surge suppression circuit of two independent closed loops |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413135.9A CN108471229B (en) | 2018-05-03 | 2018-05-03 | Surge suppression circuit of two independent closed loops |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108471229A true CN108471229A (en) | 2018-08-31 |
| CN108471229B CN108471229B (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810413135.9A Active CN108471229B (en) | 2018-05-03 | 2018-05-03 | Surge suppression circuit of two independent closed loops |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201797293U (en) * | 2010-08-31 | 2011-04-13 | 航天科工惯性技术有限公司 | Anti-surge protection circuit for aviation direct current power supply |
| CN102315043A (en) * | 2011-09-09 | 2012-01-11 | 福州大学 | Double-closed-loop feedback-control module |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
| US20160352216A1 (en) * | 2015-05-21 | 2016-12-01 | Pacific Power Source, Inc. | Advanced PFC voltage controller |
| US20170013688A1 (en) * | 2012-06-15 | 2017-01-12 | Lightel Technologies, Inc. | Solid-State Lighting Operable With Compact Fluorescent Ballasts And AC Mains |
| CN107104593A (en) * | 2017-05-16 | 2017-08-29 | 湖南拓天节能控制技术股份有限公司 | The shared integral term PID double-closed-loop control devices of PWM count word power supply |
-
2018
- 2018-05-03 CN CN201810413135.9A patent/CN108471229B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201797293U (en) * | 2010-08-31 | 2011-04-13 | 航天科工惯性技术有限公司 | Anti-surge protection circuit for aviation direct current power supply |
| CN102315043A (en) * | 2011-09-09 | 2012-01-11 | 福州大学 | Double-closed-loop feedback-control module |
| US20170013688A1 (en) * | 2012-06-15 | 2017-01-12 | Lightel Technologies, Inc. | Solid-State Lighting Operable With Compact Fluorescent Ballasts And AC Mains |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
| US20160352216A1 (en) * | 2015-05-21 | 2016-12-01 | Pacific Power Source, Inc. | Advanced PFC voltage controller |
| CN107104593A (en) * | 2017-05-16 | 2017-08-29 | 湖南拓天节能控制技术股份有限公司 | The shared integral term PID double-closed-loop control devices of PWM count word power supply |
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| Publication number | Publication date |
|---|---|
| CN108471229B (en) | 2020-05-26 |
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