CN217216376U - Aerospace power supply current control circuit based on time sequence correction - Google Patents
Aerospace power supply current control circuit based on time sequence correction Download PDFInfo
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- CN217216376U CN217216376U CN202122970480.2U CN202122970480U CN217216376U CN 217216376 U CN217216376 U CN 217216376U CN 202122970480 U CN202122970480 U CN 202122970480U CN 217216376 U CN217216376 U CN 217216376U
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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 utility model relates to an aerospace power supply current control circuit based on chronogenesis correction of spacecraft secondary power supply technical field, include: the circuit comprises a power conversion circuit (1), a current sampling circuit (2), a time sequence correction circuit (3) and a control circuit (4), wherein the input end of the power conversion circuit (1) is connected with the input end of the current sampling circuit (2), the input end of the time sequence correction circuit (3) and the output end of the control circuit (4), and the output end of the power conversion circuit (1) is connected with a first input end of the control circuit (4); and the output end of the current sampling circuit (2) is connected with the output end of the time sequence correction circuit (3) and the second input end of the control circuit (4). The circuit can eliminate the influence of the hysteresis of the current sampling signal on the driving pulse signal, thereby ensuring the safety and reliability of the aerospace power supply.
Description
Technical Field
The utility model relates to a spacecraft secondary power supply technical field especially relates to an aerospace power supply current control circuit based on chronogenesis is rectified.
Background
A primary side isolation current sampling circuit and an isolation driving circuit are commonly adopted in a spacecraft switching power supply. The circuit has the characteristic that the sampled primary side current signal has inherent hysteresis compared with the clock signal of the controller. Due to the hysteresis of the current signal, the controller generates a malfunction or no-operation signal, which causes the power supply to work normally. Due to the development trend of miniaturization of aerospace secondary power supplies, increasing the power supply frequency becomes one of the most important means for miniaturization of secondary power supplies. However, the high frequency of the power supply increases the hysteresis of the current signal, and the stability of the aerospace power supply is seriously affected.
SUMMERY OF THE UTILITY MODEL
For overcoming the not enough among the above-mentioned prior art, the utility model aims at providing an aerospace power supply current control circuit based on chronogenesis correction eliminates the influence of the hysteresis quality of current sampling signal to drive pulse signal to guarantee aerospace power supply's security and reliability.
In order to realize the purpose of the invention, the technical proposal of the utility model is that:
the utility model provides an aerospace power supply current control circuit based on chronogenesis is rectified, include: the circuit comprises a power conversion circuit, a current sampling circuit, a time sequence correction circuit and a control circuit, wherein the input end of the power conversion circuit is connected with the input end of the current sampling circuit, the input end of the time sequence correction circuit and the output end of the control circuit, and the output end of the power conversion circuit is connected with the first input end of the control circuit;
and the output end of the current sampling circuit is connected with the output end of the time sequence correction circuit and the second input end of the control circuit.
According to the utility model discloses an aspect, chronogenesis correction circuit includes: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a first triode and a first comparator,
the first end of the fourth resistor is connected with a first reference voltage, and the second end of the fourth resistor is connected with the output end of the time sequence correction circuit;
the first end of the fifth resistor is connected with the output end of the time sequence correction circuit, and the second end of the fifth resistor is grounded;
the first end of the sixth resistor is connected with the emitter of the first triode and the second end of the third capacitor, and the second end of the sixth resistor is grounded;
the first end of the third capacitor is connected with the output end of the time sequence correction circuit;
a collector of the first triode is connected with a first end of the fourth resistor and is connected with a first reference voltage, and a base of the first triode is connected with an output end of the first comparator;
first ends of the seventh resistor and the fourth capacitor are connected with an output end of the first comparator, and second ends of the seventh resistor and the fourth capacitor are connected with an inverted input end of the first comparator;
a first end of the eighth resistor is connected with an inverting input end of the first comparator, and a second end of the eighth resistor is connected with an input end of the timing correction circuit;
and the first end of the ninth resistor is connected with the non-inverting input end of the first comparator, and the second end of the ninth resistor is grounded.
According to an aspect of the present invention, the control circuit includes: a control comparator, an overcurrent comparator, a short-circuit comparator, an error comparator, an SR latch, a driving circuit, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor, a sixth capacitor and a second triode,
first input ends of the over-current comparator and the short-circuit comparator are connected with a second input end of the control circuit, the second input end of the over-current comparator is connected with the second reference voltage, and an output end of the over-current comparator is connected with an R end of the SR latch; a second input end of the short-circuit comparator is connected with the third reference voltage, and an output end of the short-circuit comparator is connected with a base electrode of the second triode;
a second input end of the control comparator is connected with a second input end of the control circuit, and an output end of the control comparator is connected with an S end of the SR latch;
the output end of the SR latch is connected with the first end of the driving circuit;
the second end of the driving circuit is connected with the collector of the second triode, and the third end of the driving circuit is connected with the output end of the control circuit;
the emitter of the second triode is grounded;
a first end of the eleventh resistor is connected with the output end of the error comparator, and a second end of the eleventh resistor is connected with a first input end of the control comparator;
the first end of the twelfth resistor is connected with the first input end of the control comparator, and the second end of the twelfth resistor is grounded;
the positive phase input end of the error comparator is connected with a first reference voltage, and the negative phase input end of the error comparator is connected with the first input end of the control circuit;
first ends of the fifth capacitor and the sixth capacitor are both connected with a first input end of the control circuit, and a second end of the fifth capacitor is connected with a first end of the tenth resistor;
and second ends of the tenth resistor and the sixth capacitor are connected with the output end of the error comparator.
According to an aspect of the utility model, the current sampling circuit includes: a second transformer, a second resistor, a third resistor, a second capacitor and a second diode,
the first end of the second transformer is connected with the input end of the current sampling circuit, the second end of the second transformer is connected with the first end of the second resistor, and the third end of the second transformer is connected with the second end of the second resistor and grounded;
the anode of the second diode is connected with the second end of the second transformer, and the cathode of the second diode is connected with the output end of the current sampling circuit;
and the first ends of the third resistor and the second capacitor are both connected with the output end of the current sampling circuit, and the second ends are both grounded.
According to an aspect of the present invention, the power conversion circuit includes: a first transformer, a first diode, a first resistor and a first capacitor,
the first end of the first transformer is connected with voltage, the second end of the first transformer is connected with the input end of the power conversion circuit, the third end of the first transformer is connected with the anode of the first diode, and the fourth end of the first transformer is connected with the second ends of the first capacitor and the first resistor and is grounded;
and the cathode of the first diode is connected with the first ends of the first capacitor and the first resistor and is connected with the output end of the power conversion circuit.
According to an aspect of the present invention, the circuit further comprises: a switch is arranged on the base plate, and the switch,
the first end of the switch is connected with the input ends of the current sampling circuit and the power conversion circuit, the second end of the switch is connected with the input end of the time sequence correction circuit and the output end of the control circuit, and the third end of the switch is grounded.
Has the beneficial effects that:
according to the utility model discloses a scheme is through all being connected current sampling circuit, chronogenesis correction circuit with control circuit, and the current signal after the chronogenesis correction circuit is rectified is the same phase all the time with power clock signal, can eliminate the influence of current sampling signal's hysteresis quality to the drive circuit signal, has greatly improved the stability of power control loop to guarantee aerospace power's security and reliability.
The control comparator, the over-current comparator and the short-circuit comparator are combined together in the control circuit, so that the control function and the protection function of the current signal can be separated, and the control circuit can quickly respond to abnormal states of over-current or short-circuit of a power supply.
In addition, the time sequence correction circuit of the invention does not need additional power supply, has simple circuit structure and small volume, realizes low cost of the circuit and is particularly suitable for miniaturized switching power supplies.
Drawings
Fig. 1 is a schematic diagram showing the components of an aerospace power supply current control circuit based on timing correction according to an embodiment of the present invention;
fig. 2 schematically shows a specific structural diagram of an aerospace power supply current control circuit based on timing correction according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.
Fig. 1 and fig. 2 schematically show the composition and specific structure of each part of the time-series correction-based aerospace power supply current control circuit according to the present embodiment, respectively.
As shown in fig. 1, in the present embodiment, an aerospace power supply current control circuit based on timing correction is mainly composed of a power conversion circuit 1, a current sampling circuit 2, a timing correction circuit 3, and a control circuit 4. The input end of the power conversion circuit 1 is connected with the input end of the current sampling circuit 2, the input end of the time sequence correction circuit 3 and the output end of the control circuit 4, and the output end of the power conversion circuit 1 is connected with the first input end of the control circuit 4. The input end of the current sampling circuit 2 is connected with the input end of the time sequence correction circuit 3 and the output end of the control circuit 4, and the output end of the current sampling circuit 2 is connected with the output end of the time sequence correction circuit 3 and the second input end of the control circuit 4. The input end of the time sequence correction circuit 3 is connected with the output end of the control circuit 4, and the output end of the time sequence correction circuit 3 is connected with the second input end of the control circuit 4. The current sampling circuit 2 is used for detecting the current flowing through the power conversion circuit 1 and generating an original current signal. The timing correction circuit 3 is configured to generate a timing correction signal having the same frequency and phase as the control signal output by the control circuit 4, and perform a superposition operation on the timing correction signal and the original current signal to perform timing correction on the original current signal. The current signal and the control signal after the time sequence correction always keep the same frequency and the same phase, so that the abnormal power supply control state caused by the lag of the current signal is avoided, and the stability of a power supply control loop is improved. The control circuit 4 separates the current control and current protection, and the corrected current signal and the voltage signal are processed by the traditional double-loop control, so that the voltage and current parameters of the power conversion circuit 1 are accurately adjusted; the current protection part avoids complex operation, so that the circuit can respond to abnormal states such as overcurrent and short circuit more quickly, and meanwhile, the time sequence correction circuit 3 provides a loop compensation function for the control circuit 4, so that the control loop has stronger robustness.
The output end of the time sequence correction circuit 3 generates a current signal after time sequence correction, the second input end of the control circuit 4 is connected with the current signal after time sequence correction, and the first input end of the control circuit 4 is connected with a voltage sampling signal output by the power conversion circuit, so that the control circuit 4 outputs a control signal. The control signal is connected to the input terminal of the timing correction circuit 3 to provide a timing correction reference signal, and at the same time, the control signal acts on the power conversion circuit 1 through the switching device to control the energy transmission time of the power conversion circuit.
As shown in fig. 2, the timing correction circuit 3 includes: the circuit comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third capacitor C3, a fourth capacitor C4, a first triode Q1 and a first comparator U1.
A first terminal of the fourth resistor R4 is connected to the first reference voltage Vref, and a second terminal of the fourth resistor R4 is connected to the output terminal of the timing correction circuit 3. A first terminal of the fifth resistor R5 is connected to the output terminal of the timing correction circuit 3, and a second terminal of the fifth resistor R5 is grounded. A first end of the sixth resistor R6 is connected to the emitter of the first transistor Q1 and a second end of the third capacitor C3, and a second end of the sixth resistor R6 is grounded. A first terminal of the third capacitor C3 is connected to the output terminal of the timing correction circuit 3. The collector of the first transistor Q1 is connected to the first end of the fourth resistor R4 and to the first reference voltage Vref, and the base of the first transistor Q1 is connected to the output of the first comparator U1. First ends of the seventh resistor R7 and the fourth capacitor C4 are connected with an output end of the first comparator U1, and second ends of the seventh resistor R7 and the fourth capacitor C4 are connected with an inverting input end of the first comparator U1. A first terminal of the eighth resistor R8 is connected to the inverting input terminal of the first comparator U1, and a second terminal of the eighth resistor R8 is connected to the input terminal of the timing correction circuit 3. A first end of the ninth resistor R9 is connected to the non-inverting input of the first comparator U1, and a second end of the ninth resistor R9 is grounded.
As shown in fig. 2, the control circuit 4 includes: the circuit comprises a control comparator U3, an over-current comparator U4, a short-circuit comparator U5, an error comparator U2, an SR latch, a driving circuit, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5, a sixth capacitor C6 and a second triode Q2.
First input ends of the over-current comparator U4 and the short-circuit comparator U5 are connected with a second input end of the control circuit 4; a second input terminal of the over-current comparator U4 is connected to a second reference voltage Vref1, and an output terminal of the over-current comparator U4 is connected to the R terminal of the SR latch. A second input terminal of the short-circuit comparator U5 is connected to a third reference voltage Vref2, and an output terminal of the short-circuit comparator U5 is connected to a base of the second transistor Q2. A second input of control comparator U3 is connected to a second input of control circuit 4, and an output of control comparator U3 is connected to the S terminal of the SR latch. And the output end of the SR latch is connected with the first end of the driving circuit. The second end of the driving circuit is connected with the collector of the second triode Q2, and the third end of the driving circuit is connected with the output end of the control circuit 4. The emitter of the second transistor Q2 is grounded. A first terminal of the eleventh resistor R11 is connected to the output terminal of the error comparator U2, and a second terminal of the eleventh resistor R11 is connected to the first input terminal of the control comparator U3. A first end of the twelfth resistor R12 is connected to the first input terminal of the control comparator U3, and a second end of the twelfth resistor R12 is grounded. A non-inverting input terminal of the error comparator U2 is connected to the first reference voltage Vref, and an inverting input terminal of the error comparator U2 is connected to a first input terminal of the control circuit 4. First ends of the fifth capacitor C5 and the sixth capacitor C6 are both connected to a first input end of the control circuit 4, and a second end of the fifth capacitor C5 is connected to a first end of the tenth resistor R10. The second terminals of the tenth resistor R10 and the sixth capacitor C6 are both connected to the output terminal of the error comparator U2.
As shown in fig. 2, the current sampling circuit 2 includes: the circuit comprises a second transformer T2, a second resistor R2, a third resistor R3, a second capacitor C2 and a second diode D2.
A first end of the second transformer T2 is connected to the input end of the current sampling circuit 2, a second end of the second transformer T2 is connected to a first end of the second resistor R2, and a third end of the second transformer T2 is connected to a second end of the second resistor R2 and is grounded. The anode of the second diode D2 is connected to the second terminal of the second transformer T2, and the cathode of the second diode D2 is connected to the output terminal of the current sampling circuit 2. First ends of the third resistor R3 and the second capacitor C2 are both connected with the output end of the current sampling circuit 2, and second ends of the third resistor R3 and the second capacitor C2 are both grounded.
As shown in fig. 2, the power conversion circuit 1 includes: the circuit comprises a first transformer T1, a first diode D1, a first resistor R1 and a first capacitor C1. A first end of the first transformer T1 is connected to a voltage, a second end of the first transformer T1 is connected to an input end of the power conversion circuit 1, a third end of the first transformer T1 is connected to a positive electrode of the first diode D1, and a fourth end of the first transformer T1 is connected to both the first capacitor C1 and a second end of the first resistor R1, and is grounded. The cathode of the first diode D1 is connected to both the first capacitor C1 and the first end of the first resistor R1, and to the output terminal of the power conversion circuit 1.
The aerospace power supply current control circuit based on the time sequence correction further comprises: and (4) switching. As shown in fig. 2, a first terminal of the switch is connected to the input terminals of the current sampling circuit 2 and the power conversion circuit 1, a second terminal of the switch is connected to the input terminal of the timing correction circuit 3 and the output terminal of the control circuit 4, and a third terminal of the switch is grounded. When overcurrent or short circuit occurs, the control circuit 4 controls the on or off of the switching power supply by outputting high and low levels, thereby achieving the purpose of protecting the power conversion circuit 1.
When the switching power supply normally operates, in a certain period, the driving signal Vd output by the control circuit 4 is a square wave signal having the same frequency as the clock CLK. After passing through the timing correction circuit 3, the square wave signal generates a triangular wave signal having the same frequency and phase as the voltage Vd, and the triangular wave signal is superimposed on the current signal sampled by the current sampling circuit 2 through a superimposing circuit composed of a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third capacitor C3 and a first diode Q1, so as to obtain a current signal Icom having the same phase as the driving signal. The current signal Icom is subjected to different voltage division to obtain three signals with different amplitudes and same phase frequency, which are a current Icom signal, a current Icom1 signal and a current Icom2 signal entering a control comparator U3, an over-current comparator U4 and a short-circuit comparator U5 in the control circuit 4 respectively. And comparing the current Icom signal with a voltage error amplification signal output by an error amplifier consisting of the error comparator U1, the fifth capacitor C5, the sixth capacitor C6 and the tenth resistor R10, and controlling the comparator U3 to output a high level when the amplitude of the current Icom signal reaches the amplitude of the voltage Vcom signal, setting the S end of the SR latch, pulling down the signal of the driving circuit, and outputting the voltage Vd as a low level, so that the switching device is turned off, and the power conversion circuit stops energy transmission. At this time, the amplitude of the primary side current Icom signal begins to decrease, when the primary side current Icom signal decreases to be smaller than the voltage Vcom signal, the comparator U3 is controlled to output a low level, the SR latch outputs a high level, the voltage Vd of the driving circuit is enabled to recover the high level along with the period of the CLK signal, the switching device of the circuit is triggered, and the switch is enabled to be conducted again.
When the switching power supply is overcurrent, the amplitude of the current Icom1 signal reaches the amplitude of the second reference voltage Vref1, the overcurrent comparator U4 outputs a low level, rapidly pulls down the signal of the driving circuit, and the voltage Vd outputs a low level, so as to trigger and turn off the switching device of the power conversion circuit 1. After the overcurrent is removed, the overcurrent comparator U4 keeps outputting at a high level continuously, the signal level of the voltage Vd is determined by the S end of the set end of the SR latch, namely the output signal of the control comparator U3, and the power conversion circuit can recover normal output within a plurality of CLK periods.
When the switching power supply is in short circuit or is in deep overcurrent, the current Icom2 signal reaches the amplitude of the third reference voltage Vref2, the short-circuit comparator U5 outputs a high-level signal, the second triode Q2 is switched on, the output signal Vd of the driving circuit is enabled to be in a low level, and the switching device in the circuit is rapidly switched off. After the short-circuit state is removed, the short-circuit comparator U5 continuously outputs a low-level signal, the second triode Q2 is turned off, and the voltage Vd signal of the driving circuit is determined by output signals of the control comparator U3 and the overcurrent comparator U4.
According to the concept of the invention, the aerospace power supply current control circuit based on time sequence correction carries out the correction operation of adding or subtracting the primary side current sampling signal output by the secondary power supply current sampling circuit 2 and the reference signal which is output by the time sequence correction circuit 3, has the same frequency with the clock signal and has the same phase with the control signal, so that the time sequences of the corrected current sampling signal and the clock signal are the same, and the influence of the hysteresis of the current sampling signal on the drive circuit signal can be eliminated. The sampled signal then enters the control comparator U3, the over-current comparator U4, and the short-circuit comparator U5, respectively. The signals of the control comparator U3 and the over-current comparator U4 control the driving signal Vd through the SR latch, and the signal output by the short-circuit comparator U5 directly controls the signal of the driving circuit, so that the control function is separated from the protection function, the circuit can respond to abnormal conditions such as over-current and short circuit more quickly, and meanwhile, the timing correction circuit 3 provides a loop compensation function for the control circuit 4, so that the control loop 4 has stronger robustness.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An aerospace power supply current control circuit based on timing correction, comprising: a power conversion circuit (1) and a current sampling circuit (2) are characterized by further comprising: a timing correction circuit (3) and a control circuit (4),
the input end of the power conversion circuit (1) is connected with the input end of the current sampling circuit (2), the input end of the time sequence correction circuit (3) and the output end of the control circuit (4), and the output end of the power conversion circuit (1) is connected with the first input end of the control circuit (4);
and the output end of the current sampling circuit (2) is connected with the output end of the time sequence correction circuit (3) and the second input end of the control circuit (4).
2. The circuit according to claim 1, wherein the timing correction circuit (3) comprises: a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8), a ninth resistor (R9), a third capacitor (C3), a fourth capacitor (C4), a first triode (Q1) and a first comparator (U1),
a first end of the fourth resistor (R4) is connected with a first reference voltage (Vref), and a second end of the fourth resistor (R4) is connected with an output end of the timing correction circuit (3);
a first end of the fifth resistor (R5) is connected with the output end of the timing correction circuit (3), and a second end of the fifth resistor (R5) is grounded;
the first end of the sixth resistor (R6) is connected with the emitter of the first triode (Q1) and the second end of the third capacitor (C3), and the second end is grounded;
a first end of the third capacitor (C3) is connected with an output end of the timing correction circuit (3);
the collector of the first triode (Q1) is connected with the first end of the fourth resistor (R4) and is connected with the first reference voltage (Vref), and the base of the first triode is connected with the output end of the first comparator (U1);
the first ends of the seventh resistor (R7) and the fourth capacitor (C4) are connected with the output end of the first comparator (U1), and the second ends of the seventh resistor (R7) and the fourth capacitor (C4) are connected with the inverting input end of the first comparator (U1);
a first end of the eighth resistor (R8) is connected with an inverting input end of the first comparator (U1), and a second end is connected with an input end of the timing correction circuit (3);
the first end of the ninth resistor (R9) is connected with the non-inverting input end of the first comparator (U1), and the second end is grounded.
3. The circuit according to claim 1, characterized in that the control circuit (4) comprises: a control comparator (U3), an overcurrent comparator (U4), a short-circuit comparator (U5), an error comparator (U2), an SR latch, a driving circuit, a tenth resistor (R10), an eleventh resistor (R11), a twelfth resistor (R12), a fifth capacitor (C5), a sixth capacitor (C6) and a second triode (Q2),
the first input ends of the over-current comparator (U4) and the short-circuit comparator (U5) are both connected with the second input end of the control circuit (4); a second input end of the over-current comparator (U4) is connected with a second reference voltage (Vref1), and an output end of the over-current comparator is connected with the R end of the SR latch; a second input end of the short-circuit comparator (U5) is connected with a third reference voltage (Vref2), and an output end of the short-circuit comparator is connected with the base electrode of the second triode (Q2);
a second input end of the control comparator (U3) is connected with a second input end of the control circuit (4), and an output end of the control comparator is connected with an S end of the SR latch;
the output end of the SR latch is connected with the first end of the driving circuit;
the second end of the driving circuit is connected with the collector of the second triode (Q2), and the third end of the driving circuit is connected with the output end of the control circuit (4);
the emitter of the second triode (Q2) is grounded;
a first end of the eleventh resistor (R11) is connected with the output end of the error comparator (U2), and a second end of the eleventh resistor (R11) is connected with a first input end of the control comparator (U3);
a first end of the twelfth resistor (R12) is connected with the first input end of the control comparator (U3), and a second end is grounded;
the non-inverting input end of the error comparator (U2) is connected with a first reference voltage (Vref), and the inverting input end of the error comparator is connected with the first input end of the control circuit (4);
first ends of the fifth capacitor (C5) and the sixth capacitor (C6) are connected with a first input end of the control circuit (4), and a second end of the fifth capacitor (C5) is connected with a first end of the tenth resistor (R10);
the second ends of the tenth resistor (R10) and the sixth capacitor (C6) are connected with the output end of the error comparator (U2).
4. The circuit according to claim 1, characterized in that the current sampling circuit (2) comprises: a second transformer (T2), a second resistor (R2), a third resistor (R3), a second capacitor (C2) and a second diode (D2),
a first end of the second transformer (T2) is connected with an input end of the current sampling circuit (2), a second end of the second transformer is connected with a first end of a second resistor (R2), and a third end of the second transformer is connected with a second end of the second resistor (R2) and is grounded;
the anode of the second diode (D2) is connected with the second end of the second transformer (T2), and the cathode of the second diode is connected with the output end of the current sampling circuit (2);
the first ends of the third resistor (R3) and the second capacitor (C2) are both connected with the output end of the current sampling circuit (2), and the second ends are both grounded.
5. The circuit according to claim 1, characterized in that the power conversion circuit (1) comprises: a first transformer (T1), a first diode (D1), a first resistor (R1) and a first capacitor (C1),
a first end of the first transformer (T1) is connected with an input voltage, a second end of the first transformer is connected with an input end of the power conversion circuit (1), a third end of the first transformer is connected with the anode of the first diode (D1), a fourth end of the first transformer is connected with the second ends of the first capacitor (C1) and the first resistor (R1) and is grounded;
the cathode of the first diode (D1) is connected with the first end of the first capacitor (C1) and the first end of the first resistor (R1) and is connected with the output end of the power conversion circuit (1).
6. The circuit of claim 1, further comprising: a switch is arranged on the base plate, and the switch,
the first end of the switch is connected with the input ends of the current sampling circuit (2) and the power conversion circuit (1), the second end of the switch is connected with the input end of the time sequence correction circuit (3) and the output end of the control circuit (4), and the third end of the switch is grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122970480.2U CN217216376U (en) | 2021-11-30 | 2021-11-30 | Aerospace power supply current control circuit based on time sequence correction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122970480.2U CN217216376U (en) | 2021-11-30 | 2021-11-30 | Aerospace power supply current control circuit based on time sequence correction |
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| CN217216376U true CN217216376U (en) | 2022-08-16 |
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2021
- 2021-11-30 CN CN202122970480.2U patent/CN217216376U/en active Active
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