CN213027802U - Decoupling circuit - Google Patents
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- CN213027802U CN213027802U CN202022385058.6U CN202022385058U CN213027802U CN 213027802 U CN213027802 U CN 213027802U CN 202022385058 U CN202022385058 U CN 202022385058U CN 213027802 U CN213027802 U CN 213027802U
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Abstract
The utility model relates to a decoupling zero circuit relates to solar photovoltaic power generation technical field. The decoupling circuit includes: one end of a decoupling inductor is connected with the first end of the alternating current output side of the inverter, the other end of the decoupling inductor is connected with the emitter of a first switch tube, the collector of the first switch tube is connected with the emitter of a second switch tube, and the collector of the second switch tube is connected with the anode of a first decoupling capacitor; the collector of the third switching tube is connected with the collector of the first switching tube, and the emitter of the third switching tube is connected with the cathode of the second decoupling capacitor; and the collector of the fourth switching tube is connected with the collector of the first switching tube, the emitter of the fourth switching tube is connected with the emitter of the fifth switching tube, and the cathode of the first decoupling capacitor, the anode of the second decoupling capacitor and the collector of the fifth switching tube are all connected with the second end of the alternating current output side of the inverter. The utility model discloses a decoupling zero circuit is stand alone type decoupling zero, and connects in parallel in the alternating current side of dc-to-ac converter, has only used five switch tubes, has simplified two frequency power decoupling zero return circuits.
Description
Technical Field
The utility model relates to a solar photovoltaic power generation technical field especially relates to a decoupling circuit.
Background
The single-phase inverter is generally applied to medium and small Power applications, but secondary ripple occurs on a direct current side due to secondary pulsating Power generated on an alternating current side, and for the existence of the secondary ripple, especially in a Photovoltaic (PV) system, the working efficiency of a PV panel is affected, and the effect of Maximum Power Point Tracking (MPPT) is reduced. Aiming at the problem of secondary ripple decoupling, the academia generally provides two methods, namely an active power decoupling method and a passive power decoupling method, the passive power decoupling method is mainly characterized in that a passive device is added in a photovoltaic system, for example, a large electrolytic capacitor is added on a direct current side and used for buffering secondary ripple energy, the large capacitance value provided by the large electrolytic capacitor is really effective, but the problem of short service life of a common large electrolytic capacitor can be solved, the average service life of a single-phase inverter is influenced, the condition of the single-phase inverter is not ideal under the high-temperature condition, the large electrolytic capacitor can cause the volume of the whole photovoltaic system to be too large, the cost is relatively high, and the power density is reduced.
In the method, a new topological decoupling and control algorithm is mainly adopted, for example, the alternating-current side voltage is introduced into a low-frequency transformer and is connected into a decoupling capacitor after being rectified, but the whole system is complex and has large loss. Therefore, the active decoupling circuit of the existing single-phase inverter has the problem of complex decoupling loop.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a decoupling zero circuit has solved the complicated problem in active decoupling zero circuit of current single-phase inverter.
In order to achieve the above object, the utility model provides a following scheme:
a decoupling circuit, comprising: the decoupling inductor, the first switch tube, the second switch tube, the first decoupling capacitor, the third switch tube, the second decoupling capacitor, the fourth switch tube and the fifth switch tube;
one end of the decoupling inductor is connected with a first end of an alternating current output side of an inverter in a photovoltaic system, the other end of the decoupling inductor is connected with an emitter of the first switching tube, a collector of the first switching tube is connected with an emitter of the second switching tube, a collector of the second switching tube is connected with a positive electrode of the first decoupling capacitor, and a negative electrode of the first decoupling capacitor is connected with a second end of the alternating current output side of the inverter;
a collector of the third switching tube is connected with a collector of the first switching tube, an emitter of the third switching tube is connected with a negative electrode of the second decoupling capacitor, and a positive electrode of the second decoupling capacitor is connected with a second end of the alternating current output side of the inverter;
and the collector of the fourth switching tube is connected with the collector of the first switching tube, the emitter of the fourth switching tube is connected with the emitter of the fifth switching tube, and the collector of the fifth switching tube is connected with the second end of the alternating current output side of the inverter.
Optionally, the decoupling circuit further includes: a first diode, a second diode, a third diode, a fourth diode and a fifth diode;
the anode of the first diode is connected with the emitter of the first switch tube, and the cathode of the first diode is connected with the collector of the first switch tube;
the anode of the second diode is connected with the emitter of the second switching tube, and the cathode of the second diode is connected with the collector of the second switching tube;
the anode of the third diode is connected with the emitter of the third switching tube, and the cathode of the third diode is connected with the collector of the third switching tube;
the anode of the fourth diode is connected with the emitter of the fourth switching tube, and the cathode of the fourth diode is connected with the collector of the fourth switching tube;
the anode of the fifth diode is connected with the emitter of the fifth switching tube, and the cathode of the fifth diode is connected with the collector of the fifth switching tube.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a decoupling circuit. The decoupling circuit includes: the decoupling inductor, the first switch tube, the second switch tube, the first decoupling capacitor, the third switch tube, the second decoupling capacitor, the fourth switch tube and the fifth switch tube; one end of a decoupling inductor is connected with a first end of an alternating current output side of an inverter in a photovoltaic system, the other end of the decoupling inductor is connected with an emitter of a first switching tube, a collector of the first switching tube is connected with an emitter of a second switching tube, a collector of the second switching tube is connected with a positive electrode of a first decoupling capacitor, and a negative electrode of the first decoupling capacitor is connected with a second end of the alternating current output side of the inverter; a collector of the third switching tube is connected with a collector of the first switching tube, an emitter of the third switching tube is connected with a negative electrode of the second decoupling capacitor, and a positive electrode of the second decoupling capacitor is connected with a second end of the alternating current output side of the inverter; the collector of the fourth switching tube is connected with the collector of the first switching tube, the emitter of the fourth switching tube is connected with the emitter of the fifth switching tube, and the collector of the fifth switching tube is connected with the second end of the alternating current output side of the inverter. The utility model discloses a decoupling zero circuit is stand alone type decoupling zero, and decoupling zero circuit does not have shared switch with original inverter circuit part promptly, and connects in parallel in the alternating current side of dc-to-ac converter, has only used five switch tubes, compares and connects in parallel in the decoupling zero mode of direct current side in single-phase dc-to-ac converter, has simplified two frequency power decoupling zero return circuits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a structural diagram of a decoupling circuit provided in an embodiment of the present invention;
fig. 2 is a graph of the power decoupling energy coupling relationship provided by the embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a first mode according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a mode two according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a mode three according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a mode four according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a waveform of an input current at a dc side according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a dc-side bus voltage waveform provided by an embodiment of the present invention;
fig. 9 is a schematic diagram of a first decoupling capacitor voltage waveform provided by an embodiment of the present invention;
fig. 10 is a schematic diagram of a second decoupling capacitor voltage waveform provided in an embodiment of the present invention;
fig. 11 is a schematic diagram of a decoupling inductive current waveform provided by an embodiment of the present invention;
fig. 12 is a schematic diagram of an ac side load output voltage waveform according to an embodiment of the present invention;
fig. 13 is a schematic diagram of an ac side load output current waveform according to an embodiment of the present invention.
Description of the symbols: l isdThe decoupling inductor; d1A first diode; s1The first switch tube; s2The second switch tube; d2A second diode; cd1The first decoupling capacitor; s3A third switch tube; d3A third diode; cd2A second decoupling capacitor; d4A fourth diode; s4A fourth switching tube; d5A fifth diode; s5And a fifth switch tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a decoupling zero circuit has solved the complicated problem in current active decoupling zero circuit.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
This embodiment provides a decoupling zero circuit, and fig. 1 is the utility model discloses the structure diagram of the decoupling zero circuit that the embodiment provided, see fig. 1, decoupling zero circuit includes: decoupling inductance LdA first switch tube S1A second switch tube S2A first decoupling capacitor Cd1A third switch tube S3A second decoupling capacitor Cd2And a fourth switching tube S4And a fifth switching tube S5。
Decoupling inductance LdIs connected with the first end of the AC output side of the inverter in the photovoltaic system, and the inductance L is decoupleddAnd the other end of the first switch tube S1Is transmitted byPole connection, first switching tube S1Collector and second switch tube S2Is connected to the emitter of the second switching tube S2Collector and first decoupling capacitor Cd1Is connected to the positive electrode of a first decoupling capacitor Cd1Is connected to a second end of the inverter on the ac output side.
Third switch tube S3Collector and first switch tube S1Is connected with the collector of the third switching tube S3Emitter and second decoupling capacitor Cd2Is connected to the negative pole of the second decoupling capacitor Cd2Is connected to a second end of the inverter on the ac output side.
Fourth switch tube S4Collector and first switch tube S1Is connected with the collector of the fourth switching tube S4Emitter and fifth switch tube S5Is connected to the emitter of the fifth switching tube S5Is connected to a second end of the inverter on the ac output side.
The decoupling circuit further includes: first diode D1A second diode D2A third diode D3A fourth diode D4And a fifth diode D5。
First diode D1Positive pole and first switch tube S1Of the first diode D1Negative pole of (2) and first switch tube S1Is connected to the collector of (a).
Second diode D2Positive pole and second switch tube S2Is connected to the emitter of a second diode D2And the second switch tube S2Is connected to the collector of (a).
Third diode D3Positive electrode and third switching tube S3Is connected to the emitter of a third diode D3Negative pole and third switch tube S3Is connected to the collector of (a).
Fourth diode D4Positive electrode and fourth switch tube S4Is connected to the emitter of a fourth diode D4Negative pole and fourth switch tube S4Is connected to the collector of (a).
Fifth diode D5Positive pole and fifth switch tube S5Is connected to the emitter of a fifth diode D5Negative pole of (1) and a fifth switching tube S5Is connected to the collector of (a).
The decoupling circuit is directly connected in parallel to the AC output side of the inverter, the whole decoupling circuit is of a pi-shaped structure, and the left branch of the decoupling circuit is formed by the output voltage U of the AC output side of the inverterinvDecoupling inductor LdAnd a first switching tube S1The right branch of the decoupling circuit is composed of a fourth switch tube S4And a fifth switching tube S5Constitution S4And S5Is connected with the emitter of the second switching tube S2Collector and first decoupling capacitor Cd1Connected in series in the forward direction and forming a closed loop with the left branch, wherein S2Emitter and S1Is connected with the collector of the third switching tube S3Emitter and second decoupling capacitor Cd2Is connected in series in the negative direction and forms a loop with the right branch, wherein S3Collector electrode of (1) and S4Is connected to the collector of the collector.
The decoupling circuit of this embodiment is a power decoupling circuit, and the working principle of the power decoupling circuit is:
AC side output voltage u of invertergAnd an output current igGenerally sinusoidal, as shown in the following equation:
ug(t)＝Ugsin(ωt) (1)
in the above formula, ug(t) the AC side output voltage of the inverter at time t, UgFor the AC side output voltage amplitude, ω is the fundamental angular frequency, t represents time, ig(t) the AC side output current of the inverter at time t, IgFor the amplitude of the output current at the ac side,
is the power factor angle. To facilitate the analysis of the coupling relationship, let
Is 0. Obtaining instantaneous power P of the alternating current side according to the formulas (1) and (2)acConstant power P input from DC sidePVRespectively as follows:
in the above formula, Pac(t) represents the ac side instantaneous power of the inverter at time t; u shapegRepresenting the amplitude of the output voltage of the alternating current side of the inverter; i isgRepresenting the amplitude of the output current of the alternating current side of the inverter; ω represents the fundamental angular frequency; t represents time; pPVFor input of constant power, P, to the DC siderIs the pulse power with double frequency of periodic variation.
Comparing the instantaneous power at the AC side with the constant power input at the DC side, and judging the relation of power decoupling energy, namely when the instantaneous power at the AC side is greater than the constant power input at the DC side, the photovoltaic system is in the process of releasing energy, and the decoupling capacitor is in a voltage reduction state; when the instantaneous power of the alternating current side is smaller than the constant power input by the direct current side, the photovoltaic system is in an energy absorption process, and the decoupling capacitor is in a boosting state. Meanwhile, a power decoupling energy coupling relation curve can be obtained according to the formulas (1) to (5), and is shown in fig. 2. T in fig. 2 is the period of the output voltage.
The decoupling circuit has four working modes, wherein the mode I and the mode II correspond to the positive half period of the output voltage of the inverter, and the mode III and the mode IV correspond to the negative half period of the output voltage of the inverter. Mode one and mode three may be equivalent to boost circuits, and mode two and mode four may be equivalent to buck circuits.
The circuit loop corresponding to mode one is shown in FIG. 3, when the inverter output voltage is positive, as can be seen from FIG. 2, at [0, T/8 ]]And [3T/8,4T/8]In the time period, the instantaneous power of the AC side is smaller than the input constant power of the DC side, S4Controlled by the driving pulse, and in the on state, the circuit loop is Uinv+-Ld-D1-S4-D5-Uinv-The decoupling inductance current gradually rises, and when the decoupling inductance current peak value reaches the decoupling inductance peak value reference current idrefAt this time, switch S4Is disconnected and the circuit loop is Uinv+-Ld-D1-D2-Cd1-Uinv-. The circuit loop corresponding to the mode one is specifically as follows: when the first switching tube, the second switching tube, the third switching tube and the fifth switching tube are disconnected, current flows out from the first end of the alternating current output side of the inverter, and flows back to the second end of the alternating current output side of the inverter after sequentially passing through the decoupling inductor, the first diode, the fourth switching tube and the fifth diode; when the fourth switching tube, the first switching tube, the second switching tube, the third switching tube and the fifth switching tube are all disconnected, current flows out from the first end of the alternating current output side of the inverter, sequentially flows through the decoupling inductor, the first diode, the second diode and the first decoupling capacitor and then flows back to the second end of the alternating current output side of the inverter.
The circuit loop corresponding to the second mode is shown in FIG. 4, the output voltage of the inverter is positive and is [ T/8,3T/8 ]]In the time period, the instantaneous power of the AC side is greater than the input constant power of the DC side, S5,S1Remains on, S2Controlled by a drive pulse when S2When in the conducting state, the circuit loop is Cd1-S2-S1-Ld-Uinv-Cd1The decoupling inductor current gradually rises, and when the current peak value reaches a reference value idrefTime, switch S2When the circuit is disconnected, the circuit loop is Uinv--S5-D4-S1-Ld-Uinv+. The circuit loop corresponding to the mode two is specifically as follows: the second switching tube, the first switching tube and the fifth switching tube are conducted, and the third switching tube and the fourth switching tube are conductedWhen the switch tube is disconnected, current flows out from the second end of the alternating current output side of the inverter, sequentially flows through the first decoupling capacitor, the second switch tube, the first switch tube and the decoupling inductor and then flows back to the first end of the alternating current output side of the inverter; when the third switching tube and the fourth switching tube are disconnected, current flows out from the second end of the alternating current output side of the inverter, sequentially passes through the fifth switching tube, the fourth diode, the first switching tube and the decoupling inductor, and then flows back to the first end of the alternating current output side of the inverter.
The circuit loop corresponding to the third mode is shown in FIG. 5, and the output voltage of the inverter is negative and is in the values of [4T/8,5T/8 ]]And [7T/8, T]In the time period, the instantaneous power of the AC side is smaller than the input constant power of the DC side, S5Controlled by a drive pulse when S5When in a conducting state, the circuit loop is Uinv+-S5-D4-S1-Ld-Uinv-The decoupling inductor current gradually rises, and when the current peak value reaches a reference value idrefTime, switch S5When the circuit is disconnected, the circuit loop is Uinv+-Cd2-D3-S1-Ld-Uinv-. The circuit loop corresponding to the mode three is specifically as follows: when the second switching tube, the third switching tube and the fourth switching tube are disconnected, current flows out from the first end of the alternating current output side of the inverter, sequentially passes through the fifth switching tube, the fourth diode, the first switching tube and the decoupling inductor, and then flows back to the second end of the alternating current output side of the inverter; when the fifth switching tube is disconnected, the first switching tube is connected, and the second switching tube, the third switching tube and the fourth switching tube are disconnected, current flows out from the first end of the alternating current output side of the inverter, sequentially passes through the second decoupling capacitor, the third diode, the first switching tube and the decoupling inductor, and then flows back to the second end of the alternating current output side of the inverter.
The circuit loop corresponding to mode four is shown in FIG. 6, when the output voltage of the inverter is negative and is in [5T/8,7T/8 ]]In the time period, the instantaneous power of the AC side is greater than the input constant power of the DC side, S3Controlled by a drive pulse when S3When conducting, the circuit loop is Cd2-Uinv-Ld-D1-S3-Cd2Decoupling the peak current i of the inductordrefWhen the reference value is reached, switch S3When the circuit is disconnected, the circuit loop is Uinv-Ld-D1-S4-D5-Uinv. The circuit loop corresponding to the mode four is specifically as follows: when the first switching tube, the second switching tube and the fifth switching tube are disconnected, current flows out from the second end of the alternating current output side of the inverter, sequentially flows through the decoupling inductor, the first diode, the third switching tube and the second decoupling capacitor, and then flows back to the first end of the alternating current output side of the inverter; when the third switching tube is disconnected, the fourth switching tube is connected, and the first switching tube, the second switching tube and the fifth switching tube are disconnected, current flows out from the second end of the alternating current output side of the inverter, and flows back to the first end of the alternating current output side of the inverter after sequentially passing through the decoupling inductor, the first diode, the fourth switching tube and the fifth diode.
In the operation process of the decoupling circuit, the operation process of the decoupling circuit is divided into four working modes according to the periodic variation rule of the pulsating power, so that the polarity of the pulsating power is not changed and is constant positive or constant negative in a single working mode. The circuit loop with four working modes is formed by combining different components in the decoupling circuit, so that each working mode can be operated independently, and secondary ripples at the direct current side of the inverter can be suppressed by buffering double-frequency power through the decoupling capacitor.
The utility model discloses keep relatively independent structure with original dc-to-ac converter, compare in the decoupling zero of direct current side, the utility model discloses a decoupling zero circuit connects in parallel in the interchange side, compares in the decoupling zero mode of other types, and this mode decoupling zero can avoid two times of frequency power through extra return circuit, if direct current side return circuit, so reduced two times of frequency power compensating circuit, plays two times of frequency power effect of compensating on the spot to reduce the return circuit loss. The independent type is that the decoupling circuit and the original inverter circuit part do not have shared switches, and the non-independent type often has switch sharing with the original inverter.
According to the discussion to the circumstances such as decoupling circuit's voltage and electric current above-mentioned, carry out simulink simulation verification, prove with matlab software to five switching power decoupling circuit (decoupling circuit) the utility model discloses a decoupling effect is good. The simulation parameter settings for the decoupling circuit are seen in table 1.
TABLE 1 simulation parameters
Fig. 7 and 8 show the dc-side input current and the bus voltage waveform, respectively, and the decoupling circuit was turned on at 0.4s, and it was observed that the ripple amplitude of the input current decreased at the instant of turning on. Before the decoupling circuit is not put into use, the maximum value of the input current is about 5.45A, the minimum value is about 4.6A, and the pulsation amplitude is about 0.85A; after the decoupling circuit was implemented, the input current had a maximum value of 5.28A, a minimum value of 4.94A, and a ripple amplitude of about 0.34A. The pulsation amplitude of input current reduces about 60% around dropping into the decoupling zero circuit, and whole decoupling zero circuit dynamic response is rapid moreover, and is similar with input current, drops to the pulsation amplitude and is about 19V by the pulsation amplitude of about 42V at 0.4s moment in direct current side bus voltage after dropping into the decoupling zero circuit, explains the utility model discloses a decoupling zero is respond well.
Fig. 9 and 10 show the voltage waveforms of the first decoupling capacitor and the second decoupling capacitor, respectively, the two decoupling capacitors run complementarily in the working period, the voltage waveform is exactly 0.01s during the working period, the voltage waveform is a pulsating secondary ripple, and the first decoupling capacitor Cd1The average voltage is about 477V, the highest voltage is about 513V, the lowest voltage is about 457V, and the pulsation amplitude is about 56V; second decoupling capacitor Cd2Average voltage is about 462V, maximum voltage is about 495V, minimum voltage is about 435V, pulse amplitude is about 60V, pulse energy and Cd1Similarly, since the equivalent circuits of the working modes corresponding to the two decoupling capacitors are the same and are both boost and buck circuits, the decoupling effect is also the same.
Fig. 11 shows a decoupling inductor current waveform, in which the magnitude of the decoupling inductor current is about 12A in the mode one state, the magnitude of the current is about 8A in the mode two state, the magnitude of the current is about 12A in the mode three state, the magnitude of the current is about 8A in the mode four state, the mode one and the mode three are both operated in boost state, the mode two and the mode four are both operated in buck state, and the decoupling inductor current is close to that when they are operated in the same equivalent circuit state.
Fig. 12 and 13 show the output voltage waveform and the current waveform of the load on the ac side, respectively, and after the decoupling circuit is put in 0.4s, it can be seen that the output voltage and the current of the load hardly change significantly, the voltage amplitude is still stabilized at about 300V, and the current amplitude is stabilized at about 3A, so that the conclusion that the control of the decoupling circuit has no significant influence on the output voltage can be obtained.
For a power decoupling circuit which is not added, if the ripple of the bus voltage is reduced from the original 42V to 19V and the voltage ripple of the direct current side is reduced to 23V, a large capacitor of 200 muf needs to be connected in parallel on the direct current side; after the decoupling circuit is added, if the ripple of the bus voltage is reduced from 42V to 19V, only 100 muf capacitors need to be connected in parallel. So through carrying out the emulation to decoupling zero circuit and verifying the discovery the utility model discloses secondary ripple that can be among the effectual suppression busbar voltage exists, and decoupling zero circuit can reach the effect that reduces direct current side electric capacity, extension power life simultaneously.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (2)
1. A decoupling circuit, comprising: the decoupling inductor, the first switch tube, the second switch tube, the first decoupling capacitor, the third switch tube, the second decoupling capacitor, the fourth switch tube and the fifth switch tube;
one end of the decoupling inductor is connected with a first end of an alternating current output side of an inverter in a photovoltaic system, the other end of the decoupling inductor is connected with an emitter of the first switching tube, a collector of the first switching tube is connected with an emitter of the second switching tube, a collector of the second switching tube is connected with a positive electrode of the first decoupling capacitor, and a negative electrode of the first decoupling capacitor is connected with a second end of the alternating current output side of the inverter;
a collector of the third switching tube is connected with a collector of the first switching tube, an emitter of the third switching tube is connected with a negative electrode of the second decoupling capacitor, and a positive electrode of the second decoupling capacitor is connected with a second end of the alternating current output side of the inverter;
and the collector of the fourth switching tube is connected with the collector of the first switching tube, the emitter of the fourth switching tube is connected with the emitter of the fifth switching tube, and the collector of the fifth switching tube is connected with the second end of the alternating current output side of the inverter.
2. The decoupling circuit of claim 1, further comprising: a first diode, a second diode, a third diode, a fourth diode and a fifth diode;
the anode of the first diode is connected with the emitter of the first switch tube, and the cathode of the first diode is connected with the collector of the first switch tube;
the anode of the second diode is connected with the emitter of the second switching tube, and the cathode of the second diode is connected with the collector of the second switching tube;
the anode of the third diode is connected with the emitter of the third switching tube, and the cathode of the third diode is connected with the collector of the third switching tube;
the anode of the fourth diode is connected with the emitter of the fourth switching tube, and the cathode of the fourth diode is connected with the collector of the fourth switching tube;
the anode of the fifth diode is connected with the emitter of the fifth switching tube, and the cathode of the fifth diode is connected with the collector of the fifth switching tube.
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| CN113838348A (en) * | 2021-06-17 | 2021-12-24 | 北方工业大学 | Demonstration teaching aid based on DC-DC topological current decoupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113838348A (en) * | 2021-06-17 | 2021-12-24 | 北方工业大学 | Demonstration teaching aid based on DC-DC topological current decoupling |
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