CN215300506U - Full-string bidirectional converter circuit - Google Patents
Full-string bidirectional converter circuit Download PDFInfo
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- CN215300506U CN215300506U CN202121735255.4U CN202121735255U CN215300506U CN 215300506 U CN215300506 U CN 215300506U CN 202121735255 U CN202121735255 U CN 202121735255U CN 215300506 U CN215300506 U CN 215300506U
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Abstract
The utility model relates to the technical field of switching power supply, and discloses a full-string bidirectional converter circuit, which comprises an input circuit and an output circuit, wherein the input circuit consists of a switch transformer T1, a switch transformer T2, a switch tube Q1 and a switch tube Q2; the utility model discloses a full string formula bidirectional converter circuit switches on in turn through two switch tubes, two switching transformer serial simultaneous workings, and the withstand voltage requirement of switch tube is not high, does not have the risk that the switch tube half switched on simultaneously, possesses the function that automatic magnetism resets, and energy utilization is abundant, and output is big, and direct current bias magnet never accumulates, and operating condition is reliable and stable, and circuit structure and drive are simple, and use cost is lower relatively, facilitate promotion.
Description
Technical Field
The utility model relates to a switching power supply technical field especially relates to a full string formula bidirectional converter circuit.
Background
In a plurality of switching power supply circuit topologies, the bidirectional converter circuit has a full-bridge type, a half-bridge type and a push-pull type, and has the excellent performance characteristics of simple circuit structure, input and output electrical isolation, small output voltage ripple, high conversion efficiency and the like, so that the bidirectional converter circuit is widely concerned by the industry. Because full-bridge type and half-bridge type converter circuits need high-end drive and low-end drive, the problem of simultaneous half-conduction of control switch tubes is caused; the push-pull converter circuit only needs low-end driving, and although the problem of controlling the switching tube to be in semi-conduction at the same time is solved, the push-pull converter circuit has the phenomenon of direct-current magnetic biasing and high requirement on the withstand voltage of the switching tube, and because the push-pull converter circuit does not have a high-efficiency magnetic reset function, the magnetic core enters a saturated state through magnetic biasing accumulation of a plurality of periods, the excitation current of the high-frequency transformer is overlarge, and even the switching tube is damaged; in order to solve the technical problems, the existing full-bridge or half-bridge solution intentionally staggers the on and off of two groups of control switches for a short time, but still has the risk of half-on of the switch tubes at the same time; the push-pull type switch tube has the defects of high requirement on voltage resistance of the switch tube and accumulative direct current magnetic bias.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present invention provides a full-string bidirectional converter circuit; the full-string bidirectional converter circuit of the utility model only needs low-end driving, utilizes two switching tubes to be alternatively conducted, two switching transformers work serially and simultaneously, the voltage-resistant requirement of the switching tubes is not high, the risk of half-conduction of the switching tubes simultaneously does not exist, one switching transformer is a power supply transformer, and the other switching transformer is an output transformer; the magnetic reset circuit has the advantages of automatic magnetic reset function, full energy utilization, high magnetic reset efficiency, no accumulated direct current magnetic bias, stable and reliable working state, high output power, simple circuit structure and drive, relatively low use cost and convenient popularization.
The utility model discloses a concrete technical scheme does: a full-string bidirectional converter circuit comprises an input circuit and an output circuit.
The input circuit is composed of a switch transformer T1, a switch transformer T2, a switch tube Q1 and a switch tube Q2.
The switching transformer T1 comprises a primary winding N1 and a secondary winding N2.
The switching transformer T2 comprises a primary winding W1 and a secondary winding W2.
Wherein, the internal connection relation of the input circuit is as follows: the positive electrode IN + of the direct current input end is respectively connected with the end a1 of the primary winding N1 and the end b2 of the secondary winding N2, the end a2 of the primary winding N1 is respectively connected with the end x2 of the primary winding W1 and the drain of the switching tube Q1, the gate of the switching tube Q1 is connected with a control signal H1, the end b1 of the secondary winding N2 is respectively connected with the end x1 of the primary winding W1 and the drain of the switching tube Q2, the gate of the switching tube Q2 is connected with the control signal H2, and the source of the switching tube Q1 and the source of the switching tube Q2 are respectively connected with the negative electrode IN-of the direct current input end.
The output circuit is composed of a diode D1, a diode D2, a diode D3, an inductor L1 and a capacitor C1.
Wherein, the internal connection relation of the output circuit is as follows: one end of a secondary winding W2 of the switch transformer T2 is connected with the anode of a diode D1, the other end of the secondary winding W2 is connected with the anode of a diode D2, the cathode of a diode D1, the cathode of a diode D2 and the cathode of a diode D3 are respectively connected with one end of an inductor L1, the other end of an inductor L1 and the anode of a capacitor C1 are respectively connected with the anode OUT + of a direct current output end, and the cathode of a capacitor C1, the anode of the diode D3 and a center tap of the secondary winding W2 are respectively connected with the cathode OUT-of the direct current output end.
The wire diameter and the number of turns of the primary winding N1 and the secondary winding N2 of the switching transformer T1 are the same, and the end a1 of the primary winding N1 and the end b1 of the secondary winding N2 are terminals with the same name.
The control signal H1 and the control signal H2 are two paths of square wave signals with opposite phases.
The utility model discloses a concrete working process of full string formula bidirectional converter circuit does:
when the control signal H1 is at a high level, the switching tube Q2 is turned off, the switching tube Q1 is turned on, the primary winding N1 of the switching transformer T1 is energized to generate a magnetic field, energy is transferred to the secondary winding N2 through the soft magnetic core of the switching transformer T1, according to the forward principle of the switching power supply, the b1 end of the secondary winding N2 generates a positive voltage, the voltage is superposed with the positive electrode IN + voltage of the direct current input terminal, the b1 end of the secondary winding N2 outputs electric energy to the x1 end of the primary winding W1 of the switching transformer T2, the primary winding W1 is energized to generate a magnetic field until the control signal H2 is at a high level, and simultaneously, energy is transferred to the secondary winding W2 through the soft magnetic core of the switching transformer T2, and the secondary winding W2 outputs electric energy through the output circuit;
when the control signal H2 is at a high level, the switching tube Q1 is turned off, the switching tube Q2 is turned on, the secondary winding N2 of the switching transformer T1 is energized to generate a magnetic field, energy is transferred to the primary winding N1 through the soft magnetic core of the switching transformer T1, according to the forward principle of the switching power supply, the end a2 of the primary winding N1 generates a positive voltage, the voltage is superposed with the positive electrode IN + voltage of the direct current input terminal, the end a2 of the primary winding N1 outputs electric energy to the end x2 of the primary winding W1 of the switching transformer T2, the primary winding W1 is energized to generate a magnetic field until the control signal H1 is at a high level, and simultaneously, energy is transferred to the secondary winding W2 through the soft magnetic core of the switching transformer T2, and the secondary winding W2 outputs electric energy through the output circuit;
when the switching tube Q1 is turned off and the switching tube Q2 is not turned on, the switching transformer T1 automatically and magnetically resets immediately, and a magnetic reset loop is formed through the end a2 of the primary winding N1 → the end x2 of the primary winding W1 → the end x1 of the primary winding W1 → the end b1 of the secondary winding N2 → the end b2 of the secondary winding N2 → the end a1 of the primary winding N1, and the secondary winding W2 of the switching transformer T2 outputs electric energy;
when the switching tube Q2 is turned off and the switching tube Q1 is not turned on, the switching transformer T1 automatically and magnetically resets immediately, and a magnetic reset loop is formed through the end b1 of the secondary winding N2 → the end x1 of the primary winding W1 → the end x2 of the primary winding W1 → the end a2 of the primary winding N2 → the end a1 of the primary winding N2 → the end b2 of the secondary winding N2, and the secondary winding W2 of the switching transformer T2 outputs electric energy;
when the diode D1 or the diode D2 of the output circuit outputs pulsating direct current, the pulsating direct current is filtered by the inductor L1 and the capacitor C1, and then the pulsating direct current is output as electric energy through the positive pole OUT + of the direct current output end; when the diode D1 and the diode D2 do not output pulsating direct current in the operation process, the inductor L1 releases energy to the capacitor C1, an energy release loop is formed by the capacitor C1 or a load and the diode D3, and meanwhile the capacitor C1 outputs electric energy to the load.
Preferably, the switching tube Q1 and the switching tube Q2 are an NMOS field effect tube Q1 and an NMOS field effect tube Q2, respectively.
Preferably, the switching tube Q1 and the switching tube Q2 are an IGBT Q1 and an IGBT Q2, respectively.
The beneficial effects of the utility model reside in that:
the utility model discloses a full string formula bidirectional converter circuit, the withstand voltage requirement of switch tube is not high, does not have the risk that the switch tube half switched on simultaneously, possesses the function that automatic magnetism resets, and energy utilization is abundant, and output is big, and direct current magnetic biasing is not accumulated for ever, and operating condition is reliable and stable, and circuit structure and drive are simple.
Drawings
Fig. 1 is a schematic diagram of a circuit connection of a full-string bidirectional converter according to the present invention;
fig. 2 is a timing diagram of the control signal H1 and the control signal H2 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.
Example 1
As shown in fig. 1, a full-serial bidirectional converter circuit includes an input circuit and an output circuit;
the input circuit consists of a switch transformer T1, a switch transformer T2, a switch tube Q1 and a switch tube Q2;
the switching transformer T1 comprises a primary winding N1 and a secondary winding N2;
the switching transformer T2 comprises a primary winding W1 and a secondary winding W2;
wherein, the internal connection relation of the input circuit is as follows: the positive electrode IN + of the direct current input end is respectively connected with the end a1 of the primary winding N1 and the end b2 of the secondary winding N2, the end a2 of the primary winding N1 is respectively connected with the end x2 of the primary winding W1 and the drain of the switching tube Q1, the grid of the switching tube Q1 is connected with a control signal H1, the end b1 of the secondary winding N2 is respectively connected with the end x1 of the primary winding W1 and the drain of the switching tube Q2, the grid of the switching tube Q2 is connected with the control signal H2, and the source of the switching tube Q1 and the source of the switching tube Q2 are respectively connected with the negative electrode IN < - >, of the direct current input end;
the output circuit consists of a diode D1, a diode D2, a diode D3, an inductor L1 and a capacitor C1;
wherein, the internal connection relation of the output circuit is as follows: one end s1 of a secondary winding W2 of the switch transformer T2 is connected with the anode of a diode D1, the other end s2 of the secondary winding W2 is connected with the anode of a diode D2, the cathode of the diode D1, the cathode of the diode D2 and the cathode of a diode D3 are respectively connected with one end of an inductor L1, the other end of the inductor L1 and the anode of a capacitor C1 are respectively connected with the anode OUT + of a direct-current output end, and the cathode of the capacitor C1, the anode of the diode D3 and a center tap of the secondary winding W2 are respectively connected with the cathode OUT < - >;
in this embodiment, the primary winding N1 and the secondary winding N2 of the switching transformer T1 have the same wire diameter and the same number of turns;
in this embodiment, the a1 terminal of the primary winding N1 of the switching transformer T1 and the b1 terminal of the secondary winding N2 are dotted terminals;
in this embodiment, as shown in fig. 2, the control signal H1 and the control signal H2 are two paths of square wave signals with opposite phases;
in this embodiment, the switching transistor Q1 and the switching transistor Q2 are an NMOS field effect transistor Q1 and an NMOS field effect transistor Q2, respectively;
the utility model discloses a concrete working process of full string formula bidirectional converter circuit does:
when the control signal H1 is at a high level, the switching tube Q2 is turned off, the switching tube Q1 is turned on, the primary winding N1 of the switching transformer T1 is energized to generate a magnetic field, energy is transferred to the secondary winding N2 through the soft magnetic core of the switching transformer T1, according to the forward principle of the switching power supply, the b1 end of the secondary winding N2 generates a positive voltage, the voltage is superposed with the positive electrode IN + voltage of the direct current input terminal, the b1 end of the secondary winding N2 outputs electric energy to the x1 end of the primary winding W1 of the switching transformer T2, the primary winding W1 is energized to generate a magnetic field until the control signal H2 is at a high level, and simultaneously, energy is transferred to the secondary winding W2 through the soft magnetic core of the switching transformer T2, and the secondary winding W2 outputs electric energy through the output circuit;
when the control signal H2 is at a high level, the switching tube Q1 is turned off, the switching tube Q2 is turned on, the secondary winding N2 of the switching transformer T1 is energized to generate a magnetic field, energy is transferred to the primary winding N1 through the soft magnetic core of the switching transformer T1, according to the forward principle of the switching power supply, the end a2 of the primary winding N1 generates a positive voltage, the voltage is superposed with the positive electrode IN + voltage of the direct current input terminal, the end a2 of the primary winding N1 outputs electric energy to the end x2 of the primary winding W1 of the switching transformer T2, the primary winding W1 is energized to generate a magnetic field until the control signal H1 is at a high level, and simultaneously, energy is transferred to the secondary winding W2 through the soft magnetic core of the switching transformer T2, and the secondary winding W2 outputs electric energy through the output circuit;
when the switching tube Q1 is turned off and the switching tube Q2 is not turned on, the switching transformer T1 automatically and magnetically resets immediately, and a magnetic reset loop is formed through the end a2 of the primary winding N1 → the end x2 of the primary winding W1 → the end x1 of the primary winding W1 → the end b1 of the secondary winding N2 → the end b2 of the secondary winding N2 → the end a1 of the primary winding N1, and the secondary winding W2 of the switching transformer T2 outputs electric energy;
when the switching tube Q2 is turned off and the switching tube Q1 is not turned on, the switching transformer T1 automatically and magnetically resets immediately, and a magnetic reset loop is formed through the end b1 of the secondary winding N2 → the end x1 of the primary winding W1 → the end x2 of the primary winding W1 → the end a2 of the primary winding N2 → the end a1 of the primary winding N2 → the end b2 of the secondary winding N2, and the secondary winding W2 of the switching transformer T2 outputs electric energy;
when the diode D1 or the diode D2 of the output circuit outputs pulsating direct current, the pulsating direct current is filtered by the inductor L1 and the capacitor C1, and then electric energy is output through the positive pole OUT + of the direct current output end; when the diode D1 and the diode D2 do not output pulsating direct current in the operation process, the inductor L1 releases energy to the capacitor C1, an energy release loop is formed by the capacitor C1 or a load and the diode D3, and meanwhile the capacitor C1 outputs electric energy to the load.
Example 2
Example 2 differs from example 1 in that:
the switch tube Q1 and the switch tube Q2 are an IGBT insulated gate bipolar transistor Q1 and an IGBT insulated gate bipolar transistor Q2 respectively.
The raw materials and the equipment used in the utility model are common raw materials and equipment in the field if no special description is provided; the methods used in the present invention are conventional methods in the art unless otherwise specified.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.
Claims (3)
1. A full-string bidirectional converter circuit, comprising: comprises an input circuit and an output circuit;
the input circuit consists of a switch transformer T1, a switch transformer T2, a switch tube Q1 and a switch tube Q2;
the switching transformer T1 comprises a primary winding N1 and a secondary winding N2;
the switching transformer T2 comprises a primary winding W1 and a secondary winding W2;
wherein, the internal connection relation of the input circuit is as follows: the positive electrode IN + of the direct current input end is respectively connected with the end a1 of the primary winding N1 and the end b2 of the secondary winding N2, the end a2 of the primary winding N1 is respectively connected with the end x2 of the primary winding W1 and the drain of the switching tube Q1, the grid of the switching tube Q1 is connected with a control signal H1, the end b1 of the secondary winding N2 is respectively connected with the end x1 of the primary winding W1 and the drain of the switching tube Q2, the grid of the switching tube Q2 is connected with the control signal H2, and the source of the switching tube Q1 and the source of the switching tube Q2 are respectively connected with the negative electrode IN < - >, of the direct current input end;
the output circuit consists of a diode D1, a diode D2, a diode D3, an inductor L1 and a capacitor C1;
wherein, the internal connection relation of the output circuit is as follows: one end s1 of a secondary winding W2 of the switch transformer T2 is connected with the anode of a diode D1, the other end s2 of the secondary winding W2 is connected with the anode of a diode D2, the cathode of the diode D1, the cathode of the diode D2 and the cathode of a diode D3 are respectively connected with one end of an inductor L1, the other end of the inductor L1 and the anode of a capacitor C1 are respectively connected with the anode OUT + of a direct-current output end, and the cathode of the capacitor C1, the anode of the diode D3 and a center tap of the secondary winding W2 are respectively connected with the cathode OUT < - >;
the wire diameter and the number of turns of a primary winding N1 and a secondary winding N2 of the switching transformer T1 are the same, and the end a1 of the primary winding N1 and the end b1 of the secondary winding N2 are terminals with the same name;
the control signal H1 and the control signal H2 are two paths of square wave signals with opposite phases.
2. The full-string bidirectional converter circuit as claimed in claim 1, wherein said switching transistors Q1 and Q2 are NMOS fet Q1 and Q2, respectively.
3. The full-string bidirectional converter circuit as claimed in claim 1, wherein said switching transistor Q1 and said switching transistor Q2 are IGBT Q1 and IGBT Q2, respectively.
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|---|---|---|---|
| CN202121735255.4U CN215300506U (en) | 2021-07-28 | 2021-07-28 | Full-string bidirectional converter circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121735255.4U CN215300506U (en) | 2021-07-28 | 2021-07-28 | Full-string bidirectional converter circuit |
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| CN215300506U true CN215300506U (en) | 2021-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489337A (en) * | 2021-07-28 | 2021-10-08 | 重庆星座汽车科技有限公司 | Full-string bidirectional converter circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489337A (en) * | 2021-07-28 | 2021-10-08 | 重庆星座汽车科技有限公司 | Full-string bidirectional converter circuit |
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| GR01 | Patent grant | ||
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Effective date of registration: 20230831 Address after: No. 25 Wang Maoxian, Qijiao Village, Wangdun Township, Duchang County, Jiujiang City, Jiangxi Province, 332000 Patentee after: Wang Changsheng Patentee after: Yang Qiaoling 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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Effective date of registration: 20230928 Address after: Room 302, 3rd Floor, Unit C, No. 239 Kangyang Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Epson New Energy Technology Co.,Ltd. Address before: No. 25 Wang Maoxian, Qijiao Village, Wangdun Township, Duchang County, Jiujiang City, Jiangxi Province, 332000 Patentee before: Wang Changsheng Patentee before: Yang Qiaoling |