CN114243665B - Current detection type current surge suppression circuit based on feedback and feedforward - Google Patents
Current detection type current surge suppression circuit based on feedback and feedforward Download PDFInfo
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- CN114243665B CN114243665B CN202111516416.5A CN202111516416A CN114243665B CN 114243665 B CN114243665 B CN 114243665B CN 202111516416 A CN202111516416 A CN 202111516416A CN 114243665 B CN114243665 B CN 114243665B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a feedback and feedforward-based current detection type current surge suppression circuit which comprises an energy storage capacitor, a feedforward accelerating circuit and a current detection type impedance control feedback circuit. According to the invention, the load current is decoupled through the series connection of the current-limiting impedance and the charging capacitor, so that the heat consumption of the current-limiting impedance circuit is reduced; negative feedback regulation is realized through current detection, and surge current is limited; the feedforward branch is introduced, so that abnormal driving voltage of the switching tube in power-on transient can be restrained, the reliability of the circuit is improved, and surge current generated in the process of voltage secondary jump after starting can be restrained; the combined use of the linear MOS tube and the switch MOS tube can reduce the impact current when the starting is completed, and the circuit can be realized by using a discrete analog device, and is simple.
Description
Technical Field
The invention belongs to the technical field of current surge suppression, and particularly relates to a current detection type current surge suppression circuit based on feedback and feedforward.
Background
The capacitor is used as an energy storage element in the circuit, so that the influence of load change on a power supply system can be reduced, and the stability of the system is improved; however, when the capacitor is powered on, the power supply directly charges the capacitor, and the capacitor impedance is changed from small to large, so that a large surge current occurs in the power supply, for example, the capacitor directly connected in parallel with the power supply, the output capacitor of the Boost converter, and the like. The large surge current can lead to the current surge of the power supply control switch, the reliability and the service life of the power-on switch are reduced, the large surge current in the solid-state switch can lead to the excessive heat damage of the chip, and the electromagnetic relay switch can lead to the contact damage.
The equivalent circuit diagram of capacitor charging at the moment of capacitor charging is shown in figure 1, the equivalent impedance of the capacitor is very small at the moment of charging, and the equivalent impedance of mΩ -level equivalent resistance and nH-level equivalent inductance in the charging loop is also very small, so that the charging current of the capacitor is very large; to reduce the capacitive power-up surge current, the impedance across the capacitive charge loop needs to be increased, thereby limiting the charging current. In order to increase the impedance of the charging loop, a current limiting resistor may be connected in series in the input loop according to the input impedance increasing method shown in fig. 2, or in series on the capacitor branch according to the capacitor branch impedance increasing method shown in fig. 3, so as to increase the impedance of the charging loop and reduce the surge current. Compared with the scheme of fig. 2 and 3, the current on the current limiting resistor of the scheme of fig. 3 does not need to be overlapped with load current, and the power consumption of the current limiting resistor is small.
The series current-limiting resistor can generate a large amount of heat after the capacitor is full, so that the power efficiency is reduced, and meanwhile, in order to meet the safety of the current-limiting resistor, the resistor needs to adopt a large packaging resistor to ensure that the resistor works normally. In order to improve efficiency, the current limiting resistor needs to be reduced after the capacitor is full, so that the heat consumption of the current limiting resistor is reduced. In order to meet the basic design requirements, a negative thermistor is used as a common method, but when the thermistor is repeatedly started, the current-limiting resistor has small resistance value and poor surge current inhibition effect when the temperature of the thermistor is high. In order to reduce the resistance of the current limiting resistor, a method of switching short-circuit current limiting resistor can be used, the switch is opened in the charging process, the current limiting resistor limits current, the switch is closed after the charging is completed, the current limiting resistor is in short circuit, and the loop resistance is reduced. In addition, the current limiting resistor can be realized by using a linear region of the MOS tube, and the resistor of the MOS tube slowly becomes smaller when the charging starts, so that the surge current is limited, but the method needs to realize that a driving voltage change curve is matched with a charging and discharging time sequence of a power loop, otherwise, the MOS tube is damaged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a current detection type current surge suppression circuit based on feedback and feedforward, which is used for decoupling load current through series connection of a current limiting impedance and a charging capacitor, so as to reduce the heat consumption of the current limiting impedance circuit; negative feedback regulation is realized through current detection, and surge current is limited; the feedforward branch is introduced, so that abnormal driving voltage of the switching tube at the moment of power-on can be restrained, the reliability of the circuit is improved, and surge current generated during secondary jump of voltage after starting can be restrained; the combined use of the linear MOS tube and the switch MOS tube can reduce the impact current when the starting is completed; the circuit can be realized by using only discrete analog devices, and is simple.
The aim of the invention is achieved by the following technical scheme:
the current surge suppression circuit comprises an energy storage capacitor, a feedforward accelerating circuit and a current detection type impedance control feedback circuit;
the feedforward accelerating circuit comprises a capacitor C1, a diode D1 and a resistor R1, wherein the first end of the capacitor C1 is connected with the positive electrode of the energy storage capacitor, the second end of the capacitor C1 is respectively connected with the cathode of the diode D1 and the first end of the resistor R1, the second end of the resistor R1 is connected with a capacitor C4 of the current detection type impedance control feedback circuit, and the anode of the diode D1 is connected with the first end of the resistor R10;
the capacitor C4 is connected with the resistor R9 in parallel, the first end of the resistor R9 is connected with the emitter of the triode Q3, the second end of the resistor R9 is connected with the base of the triode Q3, the first end of the resistor R8 is connected with the base of the triode Q3, the second end of the resistor R8 is connected with the cathode of the diode D6, and the emitter of the triode Q3 is connected with the anode of the transient suppressor D3;
the anode of the transient suppressor D3 is also connected with the first end of a resistor R7, the first end of a resistor R4, the first end of a capacitor C3 and the source electrode of the MOS tube Q2, the cathode of the transient suppressor D3 is connected with the first end of a resistor R6, the first end of a resistor R3 and the first end of a resistor R2, and the second end of the resistor R2 is connected with the anode of the energy storage capacitor;
the drain electrode of the MOS tube Q2 is connected with the second end of the resistor R10, the grid electrode of the MOS tube Q2 is connected with the anode of the voltage stabilizing tube D4, the second end of the resistor R7, the second end of the capacitor C3 and the collector electrode of the triode Q3, the cathode of the voltage stabilizing tube D4 is connected with the second end of the resistor R6, and the source electrode of the MOS tube Q2 is connected with the anode of the transient suppressor D5, the first end of the resistor R7, the anode of the transient suppressor D5, the first end of the capacitor C3 and the first end of the resistor R4;
the source electrode of the MOS tube Q1 is connected with the anode of the transient suppressor D2, the first end of the capacitor C2, the first end of the resistor R5 and the second end of the resistor R10, the drain electrode of the MOS tube Q1 is connected with the negative electrode of the energy storage capacitor, and the grid electrode of the MOS tube Q1 is connected with the cathode of the transient suppressor D2, the second end of the capacitor C2, the second end of the resistor R5, the second end of the resistor R4 and the second end of the resistor R3.
Further, the current detection type impedance control feedback circuit further comprises a transient suppressor D5, the anode of the transient suppressor D5 is connected with the source electrode of the MOS tube Q2, and the cathode of the transient suppressor D5 is connected with the grid electrode of the MOS tube Q2.
Further, the current detection type impedance control feedback circuit further comprises a diode D6, the cathode of the diode D6 is connected with the second end of the resistor R8, and the anode of the diode D6 is connected with the second end of the resistor R10 and the drain electrode of the MOS tube Q2.
Further, the resistance of the resistor R9 is far greater than that of the resistor R8.
Further, the time constant of the resistor R6 and the capacitor C3 is much larger than the time constant of the resistor R3 and the capacitor C2.
Further, the time constant of the resistor R3 and the capacitor C2 is much larger than the time constant of the resistor R1 and the capacitor C1.
Further, the voltage value of the transient suppressor D3 is higher than the saturated on driving voltage of the MOS transistor Q1 and the MOS transistor Q2.
Further, the withstand voltage of the MOS transistor Q1, the capacitor C1 and the diode D1 is a power supply voltage.
The invention has the beneficial effects that:
(1) According to the invention, the load current is decoupled through the series connection of the current-limiting impedance and the charging capacitor, so that the heat consumption of the current-limiting impedance circuit is reduced.
(2) According to the invention, negative feedback regulation is realized through current detection, and surge current is limited.
(2) The invention introduces the feedforward branch, which not only can inhibit abnormal driving voltage of the switching tube at the moment of power-on, and improve the reliability of the circuit, but also can inhibit surge current generated during secondary jump of voltage after starting.
(3) The combined use of the linear MOS tube and the switch MOS tube can reduce the impact current when the starting is completed.
Drawings
FIG. 1 is a diagram of a capacitive charge equivalent circuit at the moment of capacitive powering up;
FIG. 2 is a circuit diagram of an input impedance boosting method;
FIG. 3 is a circuit diagram of a capacitive branch impedance boosting method;
FIG. 4 is a schematic block diagram of a current detection type current surge suppression circuit based on feedback and feedforward according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a feedback and feedforward based current detection type current surge suppression circuit according to an embodiment of the present invention;
fig. 6 is a test waveform diagram of a current detection type current surge suppression circuit based on feedback and feedforward according to an embodiment of the present invention, wherein fig. 6 (a) is a waveform diagram of a change in energy storage capacitance when voltage suddenly changes, and fig. 6 (b) is a waveform diagram of a change in power supply current when voltage suddenly changes;
FIG. 7 is a circuit diagram of a current surge suppression circuit without a feedforward acceleration circuit provided by an embodiment of the present invention;
fig. 8 is a test waveform diagram of a current surge suppression circuit without a feedforward accelerator circuit according to an embodiment of the present invention, where fig. 8 (a) is a waveform diagram of a change in storage capacitance when the feedforward accelerator circuit is free from voltage abrupt change, and fig. 8 (b) is a waveform diagram of a change in power supply current when the feedforward accelerator circuit is free from voltage abrupt change;
fig. 9 is a waveform comparison diagram of a current surge suppression circuit with a feedforward accelerator circuit and a current surge suppression circuit without a feedforward accelerator circuit according to an embodiment of the present invention, where fig. 9 (a) is a waveform diagram of a current surge suppression circuit without a feedforward circuit and fig. 9 (b) is a waveform diagram of a current surge suppression circuit with a feedforward accelerator circuit.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Aiming at the defects of the existing charge-discharge circuit, the invention provides the following embodiment of a current detection type current surge suppression circuit based on feedback and feedforward, and reliable and rapid charge is realized.
Referring to fig. 4, as shown in fig. 4, a schematic circuit diagram of a current detection type current surge suppression circuit based on feedback and feedforward according to the present embodiment is provided, where the circuit is composed of two major parts, namely a feedforward acceleration branch and a current detection type impedance control feedback circuit; the feedforward accelerating circuit accelerates response mutation when voltage suddenly changes so that the impedance of the current detection type impedance control feedback circuit rapidly becomes larger; the current detection type impedance control feedback circuit comprises a driving circuit, a current detection circuit, a negative feedback circuit and a controlled impedance circuit, wherein the driving circuit controls the impedance of the MOS tube to realize charging impedance change, the current detection circuit detects the driving current to finish feedback input, the feedback circuit realizes negative feedback control of the driving circuit according to the current detection input, and the controlled impedance circuit executes impedance change according to the driving voltage.
Referring to fig. 5, a circuit diagram of a current detection type current surge suppression circuit based on feedback and feedforward according to the present embodiment is shown in fig. 5.
As an implementation, the following design parameters of this embodiment are obtained according to the schematic diagrams and circuit operation principles of fig. 4 and 5:
the energy storage capacitor Cin is 300uF, the power supply voltage is 180-350V, and the rated voltage is 270V.
R1＝75kΩ，R2＝400kΩ，R3＝27kΩ，R4＝30kΩ，R5＝300kΩ,R6＝62kΩ，R7＝100kΩ，R8＝1kΩ，R9＝100kΩ，R10＝110Ω。
C1＝220nF，C2＝100nF，C3＝100nF，C3＝10nF。
The voltage withstand voltage of the diode D1 is 400V, the breakdown voltages of the transient suppressors D2 and D5 are 12V, the breakdown voltage of the transient suppressor D3 is 33V, the breakdown voltage of the voltage stabilizing tube D4 is 4.3V, the diode D5 is a signal diode, the voltage withstand voltage of the MOS tube Q1 is 400V, the voltage withstand voltage of the MOS tube Q2 is 60V, and the triode Q2 is a signal triode.
The feedforward accelerating circuit consists of a capacitor C1, a resistor R1 and a diode D1; when the voltage is suddenly increased, the variable voltage charges C1 and R1, the variable instant voltage drop is mainly added on R1, the base level of a triode Q3 is increased, the driving voltage Q3 is changed into 0 after the Q3 is conducted, the capacitance charging current flows through a current limiting resistor R10, the resistance is increased and then the limiting surge current is increased, after the C1 is charged to the input voltage, the voltage of R1 is changed into 0, the base level of Q3 is reduced and then is closed, so that the Q3 driving voltage short circuit R10 is recovered, the charging loop resistance is reduced, the circuit loss is reduced, and the acceleration function of feedforward input voltage sudden increase of a feedforward acceleration circuit is realized; d1 provides a fast discharging branch for C1 to realize fast reset. The current detection type impedance control feedback circuit consists of resistors R2-R10, capacitors C2-C4, a voltage stabilizing tube D4, transient suppressors D2, D3 and D5, a diode D6, MOS transistors Q1-Q2 and a triode Q3; r2 and D3 provide voltages for the driving of Q1 and Q1; R3-R5, C2 and D2 are Q1 driving circuits, R3 and R4 provide voltage division impedance to obtain a driving voltage source, C2 provides driving energy storage and suppresses the influence of Q1 Miller effect current on driving at the moment of power-on, R5 provides a discharging branch for parasitic capacitance Cgs of C2 and Q1, D2 blocks driving voltage to prevent MOS tube damage, and a delay network formed by R3 and C2 ensures the time sequence requirement of the circuit; R6-R7, C3 and D4-D5 are Q2 driving circuits, R6 and R7 provide voltage division impedance to obtain a driving voltage source, C3 provides driving energy storage and suppresses the influence of Q2 Miller effect current on driving at the moment of power-on, R7 provides a discharging branch for parasitic capacitance Cgs of C3 and Q2, D5 is embedded with driving voltage to prevent MOS tube damage, a delay network formed by R6 and C3 ensures the time sequence requirement of the circuit, and D4 enables the rising starting point of Q2 driving voltage to be later than that of Q1 driving voltage; the current detection is realized by a resistor R10; the negative feedback circuit consists of resistors R8-R9, a capacitor C4, a diode D6 and a triode Q3, when the voltage of R10 rises when the surge current increases, the base voltage of Q3 rises, Q3 is conducted to enable the Q2 driving voltage to fall, the impedance of a charging loop increases to limit the surge current, the diode D6 prevents negative voltage on R10 from damaging the triode when the capacitor discharges, in order to ensure the feedback response speed, R9 is far larger than R8, the capacitance of C4 is as small as possible under the condition of meeting the anti-interference condition, and in addition, the voltage rise on R10 can reduce the Q1 driving voltage to increase the impedance of the circuit; the controlled impedance circuit is composed of MOS tubes Q1-Q2 and R10, when the controlled impedance circuit is started, Q1 works in a linear region, the resistance of R10 and Q1 limits surge current, Q2 works in a switching region after charging is completed, and Q2 is short-circuited to R10 to reduce resistance loss.
In order to ensure that Q1 is conducted linearly and then Q2 is conducted, the time constant of R6 and C3 is far greater than that of R3 and C2; in order to ensure that the feedforward branch circuit realizes the acceleration effect under the voltage abrupt change, the time constant of R3 and C2 is far greater than the time constant of R1 and C1; in order to ensure that Q1 and Q2 are saturated and conducted after starting, in a voltage division network consisting of R2-R4 and R6-R7, the voltage of D3 is higher than the saturated and conducted driving voltage of Q1 and Q2, so that the saturated and conducted MOS tube is caused by the Q1 and Q2 driving voltage obtained by secondary voltage division; in the circuit, the Q1 withstand voltage is the same as the power supply voltage, the C1 withstand voltage and the D1 withstand voltage are also the power supply voltage, the Q2 withstand voltage is related to the current limiting resistor, and the withstand voltage can be far lower than the power supply voltage.
Referring to fig. 6, fig. 6 shows a waveform diagram of a test of a current surge suppression circuit based on feedback and feedforward according to the present embodiment, fig. 6 (a) shows a waveform diagram of a change in storage capacitance when voltage is suddenly changed, and fig. 6 (b) shows a waveform diagram of a change in power supply current when voltage is suddenly changed. When the input voltage suddenly changes, the voltage of the energy storage capacitor slowly rises from 0 to realize slow start of capacitor charging; the driving voltage of the MOS tube Q1 is firstly increased to a Miller platform, the duration of the Miller platform is consistent with the charging time of the capacitor, the Miller platform Q1 is slowly conducted, the resistance is slowly reduced and works in a linear region, and after the capacitor is full, the driving voltage is increased, and the Q1 works in a switching region to reduce conduction loss; after Q1 is completely conducted, Q2 conducts a short-circuit current-limiting resistor R10, and works in a switching area to reduce conduction loss; the surge current is about 20mA, and the charging surge current of the capacitor is extremely small.
In this embodiment, in order to compare the advantage of the feedforward acceleration circuit, as shown in fig. 7, a circuit diagram of the current surge suppression circuit without the feedforward acceleration circuit provided in this embodiment is shown. Compared with the current detection type current surge suppression circuit based on feedback and feedforward provided by the embodiment, the circuit structure has the advantages that the resistor R1, the capacitor C1 and the diode D1 are removed, and the rest circuit parameters are the same.
Referring to fig. 8, fig. 8 is a test waveform diagram of a current surge suppression circuit without a feedforward accelerator circuit according to the present embodiment, where fig. 8 (a) is a waveform diagram of a change in storage capacitance when the voltage of the feedforward accelerator circuit is suddenly changed, and fig. 8 (b) is a waveform diagram of a change in power supply current when the voltage of the feedforward accelerator circuit is suddenly changed. When the power supply voltage suddenly changes, an abnormal waveform exists in the driving power supply of the Q2, and the driving peak possibly causes the MOS tube to be switched on by mistake, so that the reliability of the circuit is reduced.
Referring to fig. 9, fig. 9 is a waveform comparison diagram of a current surge suppression circuit with a feedforward accelerator circuit and a current surge suppression circuit without a feedforward accelerator circuit according to the present embodiment, wherein fig. 9 (a) is a waveform diagram of a current surge suppression circuit without a feedforward circuit, and fig. 9 (b) is a waveform diagram of a current surge suppression circuit with a feedforward accelerator circuit. When the feedforward circuit is not arranged, after the voltage jumps from 180V to 350V, the power supply current generates 2.6A and the surge current with the duration of 20 ms; after the feedforward current is introduced, the power supply current only generates negligible us-level surge current, when 180V suddenly changes to 350V, the feedforward circuit reduces the Q1 driving voltage to 0, closes the Q1, and reduces the Q1 driving voltage to the Miller platform, so that the Q1 works in a linear region, thereby increasing the capacitor charging impedance, inhibiting the surge current, and after the charging is completed, the Q1 and Q2 driving voltages rise to complete the surge current inhibition.
As can be seen from the comparison, the current detection type current surge suppression circuit based on feedback and feedforward provided in this embodiment can suppress the surge current during capacitor charging, and the surge current is as low as 20mA; the feedforward accelerating circuit can inhibit abnormal driving peak of the switching tube Q2 at the moment of power-on, prevent the false turn-on, and has high circuit reliability; in addition, after the feedforward accelerating circuit is started, under the condition of sudden increase of capacitor voltage, the positive feedback can be used for inhibiting surge current, and the surge current inhibition from 180V jump to 350V in the power supply adaptability test can be ensured.
The current detection type current surge suppression circuit based on feedback and feedforward is realized by using an analog device, and the circuit is simple and easy to realize; the current detection realizes negative feedback regulation and limits surge current; the feedforward branch circuit can inhibit abnormal driving voltage of the switching tube in power-on transient, so that the reliability of the circuit is improved, and surge current generated during voltage secondary jump after starting can be inhibited; compared with a method of using only a switch short-circuit current-limiting resistor, the combined use of the linear MOS tube and the switch MOS tube can reduce the impact current when the starting is completed; the current-limiting impedance circuit is connected with the capacitor in series, the current-limiting impedance circuit is connected with the load current structure, and the heat consumption of the current-limiting impedance circuit is small.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The current detection type current surge suppression circuit based on feedback and feedforward is characterized by comprising an energy storage capacitor, a feedforward accelerating circuit and a current detection type impedance control feedback circuit;
the feedforward accelerating circuit comprises a capacitor C1, a diode D1 and a resistor R1, wherein the first end of the capacitor C1 is connected with the positive electrode of the energy storage capacitor, the second end of the capacitor C1 is respectively connected with the cathode of the diode D1 and the first end of the resistor R1, the second end of the resistor R1 is connected with a capacitor C4 of the current detection type impedance control feedback circuit, and the anode of the diode D1 is connected with the first end of the resistor R10;
the capacitor C4 is connected with the resistor R9 in parallel, the first end of the resistor R9 is connected with the emitter of the triode Q3, the second end of the resistor R9 is connected with the base of the triode Q3, the first end of the resistor R8 is connected with the base of the triode Q3, the second end of the resistor R8 is connected with the cathode of the diode D6, the emitter of the triode Q3 is connected with the anode of the transient suppressor D3, and the anode of the diode D6 is connected with the second end of the resistor R10 and the drain electrode of the MOS tube Q2;
the anode of the transient suppressor D3 is also connected with the first end of a resistor R7, the first end of a resistor R4, the first end of a capacitor C3 and the source electrode of the MOS tube Q2, the cathode of the transient suppressor D3 is connected with the first end of a resistor R6, the first end of a resistor R3 and the first end of a resistor R2, and the second end of the resistor R2 is connected with the anode of the energy storage capacitor;
the drain electrode of the MOS tube Q2 is connected with the second end of the resistor R10, the grid electrode of the MOS tube Q2 is connected with the anode of the voltage stabilizing tube D4, the second end of the resistor R7, the second end of the capacitor C3 and the collector electrode of the triode Q3, the cathode of the voltage stabilizing tube D4 is connected with the second end of the resistor R6, the source electrode of the MOS tube Q2 is connected with the anode of the transient suppressor D5, the first end of the resistor R7, the first end of the capacitor C3 and the first end of the resistor R4, and the cathode of the transient suppressor D5 is connected with the grid electrode of the MOS tube Q2;
the source electrode of the MOS tube Q1 is connected with the anode of the transient suppressor D2, the first end of the capacitor C2, the first end of the resistor R5 and the second end of the resistor R10, the drain electrode of the MOS tube Q1 is connected with the negative electrode of the energy storage capacitor, and the grid electrode of the MOS tube Q1 is connected with the cathode of the transient suppressor D2, the second end of the capacitor C2, the second end of the resistor R5, the second end of the resistor R4 and the second end of the resistor R3.
2. The feedback and feedforward-based current-sensing type current surge suppression circuit of claim 1, wherein the resistor R9 has a resistance value substantially greater than the resistor R8.
3. The feedback and feedforward-based current-sensing type current surge suppression circuit of claim 1, wherein the time constant of the resistor R6 and the capacitor C3 is substantially greater than the time constant of the resistor R3 and the capacitor C2.
4. The feedback and feedforward-based current-sensing type current surge suppression circuit of claim 1, wherein the time constant of the resistor R3 and the capacitor C2 is substantially greater than the time constant of the resistor R1 and the capacitor C1.
5. The feedback and feedforward-based current-sensing type current surge suppression circuit according to claim 1, wherein the voltage value of the transient suppressor D3 is higher than the saturated on driving voltages of the MOS transistor Q1 and the MOS transistor Q2.
6. The feedback and feedforward-based current-sensing type current surge suppression circuit according to claim 1, wherein the withstand voltage of the MOS transistor Q1, the capacitor C1 and the diode D1 is a power supply voltage.
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| CN102437560A (en) * | 2011-12-20 | 2012-05-02 | 北京控制工程研究所 | Surge current suppression circuit module with recoverable over-current protection function |
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| EP2360820B1 (en) * | 2009-12-31 | 2018-03-28 | Nxp B.V. | Surge protection circuit |
| CN101916991A (en) * | 2010-08-25 | 2010-12-15 | 友达光电股份有限公司 | Absorption circuit for restraining impact current |
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| CN112993957B (en) * | 2021-03-19 | 2023-05-09 | 中国电子科技集团公司第二十九研究所 | Circuit and method for inhibiting power-on surge current of high-capacity capacitor |
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| CN102437560A (en) * | 2011-12-20 | 2012-05-02 | 北京控制工程研究所 | Surge current suppression circuit module with recoverable over-current protection function |
| CN112532046A (en) * | 2020-11-25 | 2021-03-19 | 江西清华泰豪三波电机有限公司 | Control method and device for stabilizing voltage and DC/DC conversion system |
| CN113629681A (en) * | 2021-08-24 | 2021-11-09 | 洛阳顶扬光电技术有限公司 | Start surge current suppression circuit suitable for super large energy storage capacitor |
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