CN215682138U - Half-string type bidirectional converter circuit - Google Patents
Half-string type bidirectional converter circuit Download PDFInfo
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- CN215682138U CN215682138U CN202121707388.0U CN202121707388U CN215682138U CN 215682138 U CN215682138 U CN 215682138U CN 202121707388 U CN202121707388 U CN 202121707388U CN 215682138 U CN215682138 U CN 215682138U
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Abstract
The utility model relates to the technical field of switching power supplies, and discloses a half-string bidirectional converter circuit, which comprises an input circuit and an output circuit, wherein the input circuit is connected with the output circuit; the input circuit is composed of an inductor L1, a switch transformer T1, a switch tube Q1, a diode D1, a diode D2 and a capacitor C1. The semi-serial bidirectional converter circuit stores energy by using the inductor and then releases energy to enable the switch transformer to be magnetized in a bidirectional mode, the energy is fully utilized, the working efficiency is high, more energy and electricity are saved, the output ripple wave is small, the working state is stable and reliable, the circuit structure and the driving are simple, the use cost is low, and the low-power supply can be applied more widely.
Description
Technical Field
The utility model relates to the technical field of switching power supplies, in particular to a half-string bidirectional converter circuit.
Background
In a plurality of switching power supply circuit topologies, the flyback converter circuit suitable for low power has a plurality of excellent performance characteristics such as simple structure, small volume, input and output electrical isolation and the like, so that the flyback converter circuit is widely applied to the field of household appliances. Due to the defects of large voltage output ripple, low working efficiency and the like of the flyback converter, the popularization of the flyback converter is limited to a great extent; in order to solve the technical problems, a two-way flyback parallel connection idea is presented at present, but the load has the defects that the fluctuation increases the amplitude and the frequency of ripples and the working state is not stable enough.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, the present invention provides a half-string bidirectional converter circuit; the semi-serial bidirectional converter circuit stores energy by using the inductor and then releases energy to enable the switch transformer to be magnetized in a bidirectional mode, the energy is fully utilized, the working efficiency is high, more energy and electricity are saved, the output ripple wave is small, the working state is stable and reliable, the circuit structure and the driving are simple, the use cost is low, and the low-power supply can be widely applied.
The specific technical scheme of the utility model is as follows: a half-string bidirectional converter circuit comprises an input circuit and an output circuit.
The input circuit is composed of a switch transformer T1, an inductor L1, a switch tube Q1, a diode D1, a diode D2 and a capacitor C1.
The switching transformer T1 comprises a primary winding W1 and a secondary winding W2.
Wherein, the circuit connection relation inside the input circuit is as follows: the positive electrode IN + of the direct current input end is connected with one end of an inductor L1 and the negative electrode of a diode D1, the other end of the inductor L1 is connected with the x1 end of a primary winding W1 and the drain electrode of a switch tube Q1, the x2 end of the primary winding W1 is connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with the positive electrode of the diode D1 and the negative electrode of a diode D2, the positive electrode of the diode D2 is connected with the source electrode of the switch tube Q1 and then connected with the negative electrode IN-, of the direct current input end, and the grid electrode of the switch tube Q1 is connected with a control signal H1.
The output circuit is composed of a diode D5, a diode D4, a diode D3, an inductor L2 and a capacitor C2.
Wherein, the circuit connection relation inside the output circuit is as follows: one end s1 of a secondary winding W2 of the switching transformer T1 is connected with the anode of a diode D4, the other end s2 of the secondary winding W2 is connected with the anode of a diode D5, the cathode of the diode D4 is connected with the cathode of the diode D5 and then respectively connected with the cathode of a diode D3 and one end of an inductor L2, the other end of the inductor L2 is respectively connected with the anode of a capacitor C2 and the anode OUT + of a direct current output end, and the cathode of the capacitor C2 is respectively connected with the anode of the diode D3, the center tap of the secondary winding W2 and the cathode OUT < - >.
Wherein the control signal H1 is a square wave signal.
The specific working process of the half-string bidirectional converter circuit provided by the utility model is as follows:
when the high level of the control signal H1 arrives, the switching tube Q1 is turned on, the inductor L1 is energized to store energy, and simultaneously the capacitor C1 starts to discharge, the capacitor C1 forms a discharge loop through the primary winding W1 of the switching transformer T1 → the switching tube Q1 → the diode D2 → the capacitor C1 until the low level of the control signal H1 arrives, and simultaneously the switching transformer T1 transfers energy to the secondary winding W2;
when the low level of the control signal H1 comes, the switching tube Q1 is turned off, the inductor L1 starts to release energy, the inductor L1 forms a discharge loop through the primary winding W1 of the switching transformer T1 → the capacitor C1 → the diode D1 → the inductor L1, the capacitor C1 stores electric energy until the high level of the control signal H1 comes, and the switching transformer T1 transfers energy to the secondary winding W2;
when the diode D4 or the diode D5 of the output circuit outputs pulsating direct current, the pulsating direct current is filtered by the inductor L2 and the capacitor C2, and then is output to a load through the positive pole OUT + of the direct current output end; when the diode D4 and the diode D5 do not output pulsating direct current in the operation process, the inductor L2 releases energy to the capacitor C2, an energy release loop is formed by the capacitor C2 or a load and the diode D3, and meanwhile the capacitor C2 outputs electric energy to the load.
Preferably, the switching tube Q1 is an NMOS field effect tube Q1.
The utility model has the beneficial effects that:
the semi-serial bidirectional converter circuit provided by the utility model has the advantages of full energy utilization, high working efficiency, small output ripple, stable and reliable working state and simple circuit structure and driving.
Drawings
FIG. 1 is a schematic circuit diagram of a half-string bidirectional converter according to the present invention;
FIG. 2 is a timing diagram of the control signal H1 according to the present invention.
Detailed Description
The technology of the present invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1 of the drawings, in which,
a half-serial bidirectional converter circuit comprises an input circuit and an output circuit;
the input circuit consists of a switch transformer T1, an inductor L1, a switch tube Q1, a diode D1, a diode D2 and a capacitor C1;
the switching transformer T1 comprises a primary winding W1 and a secondary winding W2;
wherein, the circuit connection relation inside the input circuit is as follows: the positive electrode IN + of the direct current input end is connected with one end of an inductor L1 and the negative electrode of a diode D1, the other end of the inductor L1 is connected with the x1 end of a primary winding W1 and the drain electrode of a switch tube Q1, the x2 end of the primary winding W1 is connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with the positive electrode of the diode D1 and the negative electrode of a diode D2, the positive electrode of the diode D2 is connected with the source electrode of a switch tube Q1 and then connected with the negative electrode IN-of the direct current input end, and the grid electrode of the switch tube Q1 is connected with a control signal H1;
the output circuit consists of a diode D5, a diode D4, a diode D3, an inductor L2 and a capacitor C2;
wherein, the circuit connection relation inside the output circuit is as follows: one end s1 of a secondary winding W2 of the switch transformer T1 is connected with the anode of a diode D4, the other end s2 of the secondary winding W2 is connected with the anode of a diode D5, the cathode of the diode D4 is connected with the cathode of the diode D5 and then respectively connected with the cathode of a diode D3 and one end of an inductor L2, the other end of the inductor L2 is respectively connected with the anode of a capacitor C2 and the anode OUT + of a direct current output end, and the cathode of a capacitor C2 is respectively connected with the anode of the diode D3, the center tap of the secondary winding W2 and the cathode OUT < - >;
in this embodiment, as shown in fig. 2, the control signal H1 is a square wave signal;
in this embodiment, the switching transistor Q1 is an NMOS field effect transistor Q1;
the specific working process of the half-string bidirectional converter circuit provided by the utility model is as follows:
when the high level of the control signal H1 arrives, the switching tube Q1 is turned on, the inductor L1 is energized to store energy, and simultaneously the capacitor C1 starts to discharge, the capacitor C1 forms a discharge loop through the primary winding W1 of the switching transformer T1 → the switching tube Q1 → the diode D2 → the capacitor C1 until the low level of the control signal H1 arrives, and simultaneously the switching transformer T1 transfers energy to the secondary winding W2;
when the low level of the control signal H1 arrives, the switching tube Q1 is turned off, the inductor L1 starts to release energy, the inductor L1 forms a discharge loop through the primary winding W1 of the switching transformer T1 → the capacitor C1 → the diode D1 → the inductor L1, the capacitor C1 stores electric energy until the high level of the control signal H1 arrives, and meanwhile, the switching transformer T1 transfers energy to the secondary winding W2;
when the diode D4 or the diode D5 of the output circuit outputs pulsating direct current, the pulsating direct current is filtered by the inductor L2 and the capacitor C2, and then is output to a load through the positive pole OUT + of the direct current output end; when the diode D4 and the diode D5 do not output pulsating direct current in the operation process, the inductor L2 releases energy to the capacitor C2, an energy release loop is formed by the capacitor C2 and the diode D3, and meanwhile the capacitor C2 outputs electric energy to a load.
The raw materials and equipment used in the utility model are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (2)
1. A half-string bidirectional converter circuit, characterized by: comprises an input circuit and an output circuit;
the input circuit consists of a switch transformer T1, an inductor L1, a switch tube Q1, a diode D1, a diode D2 and a capacitor C1;
the switching transformer T1 comprises a primary winding W1 and a secondary winding W2;
wherein, the circuit connection relation inside the input circuit is as follows: the positive electrode IN + of the direct current input end is connected with one end of an inductor L1 and the negative electrode of a diode D1, the other end of the inductor L1 is connected with the x1 end of a primary winding W1 and the drain electrode of a switch tube Q1, the x2 end of the primary winding W1 is connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with the positive electrode of the diode D1 and the negative electrode of a diode D2, the positive electrode of the diode D2 is connected with the source electrode of a switch tube Q1 and then connected with the negative electrode IN-of the direct current input end, and the grid electrode of the switch tube Q1 is connected with a control signal H1;
the output circuit consists of a diode D5, a diode D4, a diode D3, an inductor L2 and a capacitor C2;
wherein, the circuit connection relation inside the output circuit is as follows: one end s1 of a secondary winding W2 of the switch transformer T1 is connected with the anode of a diode D4, the other end s2 of the secondary winding W2 is connected with the anode of a diode D5, the cathode of the diode D4 is connected with the cathode of the diode D5 and then respectively connected with the cathode of a diode D3 and one end of an inductor L2, the other end of the inductor L2 is respectively connected with the anode of a capacitor C2 and the anode OUT + of a direct current output end, and the cathode of a capacitor C2 is respectively connected with the anode of the diode D3, the center tap of the secondary winding W2 and the cathode OUT < - >;
wherein the control signal H1 is a square wave signal.
2. The half-string bidirectional converter circuit as claimed in claim 1, wherein said switching transistor Q1 is an NMOS fet Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121707388.0U CN215682138U (en) | 2021-07-26 | 2021-07-26 | Half-string type bidirectional converter circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121707388.0U CN215682138U (en) | 2021-07-26 | 2021-07-26 | Half-string type bidirectional converter circuit |
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| CN215682138U true CN215682138U (en) | 2022-01-28 |
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| CN202121707388.0U Active CN215682138U (en) | 2021-07-26 | 2021-07-26 | Half-string type bidirectional converter circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364302A (en) * | 2021-07-26 | 2021-09-07 | 重庆星座汽车科技有限公司 | Half-string type bidirectional converter circuit |
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2021
- 2021-07-26 CN CN202121707388.0U patent/CN215682138U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364302A (en) * | 2021-07-26 | 2021-09-07 | 重庆星座汽车科技有限公司 | Half-string type bidirectional converter circuit |
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Effective date of registration: 20230901 Address after: Room 319, Building 3, No. 5, Shilong Fangzheng Middle Road, Shilong Town, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Fengke Electronic Technology Co.,Ltd. Address before: 401333 17-7, building 2, 21 Xishuang Avenue, Shapingba District, Chongqing Patentee before: Chongqing constellation Automobile Technology Co.,Ltd. |
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