CN219999229U - Flyback transformer parallel circuit - Google Patents
Flyback transformer parallel circuit Download PDFInfo
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- CN219999229U CN219999229U CN202321462501.2U CN202321462501U CN219999229U CN 219999229 U CN219999229 U CN 219999229U CN 202321462501 U CN202321462501 U CN 202321462501U CN 219999229 U CN219999229 U CN 219999229U
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- 239000003990 capacitor Substances 0.000 claims abstract description 42
- 230000001629 suppression Effects 0.000 claims abstract description 16
- 230000001052 transient effect Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model belongs to the technical field of flyback circuits, and discloses a flyback transformer parallel circuit which comprises a power supply, wherein the negative electrode of the power supply is grounded, the positive electrode of the power supply is connected with the positive electrode of an electrolytic capacitor, the positive electrodes of transient suppression diodes are connected with the first terminals of primary sides of two flyback transformers, the negative electrodes of the transient suppression diodes are connected with the negative electrodes of the two diodes, the positive electrodes of the diodes are connected with the second terminals of the primary sides of the flyback transformers, the second terminals of the primary sides of the flyback transformers are connected with the drain electrodes of power tubes, the grid electrodes of the power tubes are connected with PWM pins of PWM control chips, the source electrodes of the power tubes are grounded, the first terminals of the secondary sides of the flyback transformers are connected with the positive electrodes of the diodes, the negative electrodes of the diodes are connected with one end of the capacitor, the high-voltage output ends of the secondary sides of the flyback transformers are connected with the other ends of the capacitor, and the low-voltage output ends of the flyback transformers. By connecting the two flyback transformers in parallel to the positive electrode of the photovoltaic power supply, the transmission power of the whole circuit is improved, the heating problem of components is solved, and the whole circuit is more stable and reliable.
Description
Technical Field
The utility model relates to the technical field of flyback circuits, in particular to a flyback transformer parallel circuit.
Background
With the development of electronic technology, various electronic products are becoming more and more sophisticated in function, and the power of the electronic products is increasing, which requires a larger current of the power supply. The flyback topology structure is widely applied to various power supply products because of being capable of adapting to a wider input voltage range. With increasing current demand, a transformer coil in flyback topology needs to adopt a wire with larger sectional area, but after the sectional area of the wire is increased, the transformer coil is difficult to level, the coil is thick, and the utilization rate of the transformer is greatly reduced; the coil heating value is high, and the coil is easy to burn or the magnetic core is easy to saturate.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a flyback transformer parallel circuit.
The technical aim of the utility model is realized by the following technical scheme: the flyback transformer parallel circuit comprises a photovoltaic power supply, a cathode PV-grounded of the photovoltaic power supply, an anode PV+ of the photovoltaic power supply is connected with an anode of an electrolytic capacitor C1, a cathode of a transient suppression diode D1, a first wiring terminal 1 of a primary side of a first flyback transformer T1, a first wiring terminal 1 of a primary side of a second flyback transformer T2, a cathode of the electrolytic capacitor C1 is grounded, the cathode of the transient suppression diode D1 is respectively connected with a cathode of a first diode D2 and a cathode of a second diode D3, the anode of the first diode D2 is connected with a second wiring terminal 2 of the primary side of the first flyback transformer T1, a grid G of the first flyback transformer T1 is connected with a PWM pin of a first PWM control chip, a source S of the first power tube Q1 is grounded, the anode of the second diode D3 is connected with a second wiring terminal 2 of the primary side of the second flyback transformer T2, the second terminal 2 of the primary side of the second flyback transformer T2 is connected with the drain electrode D of the second power tube Q2, the grid electrode G of the second power tube Q2 is connected with the PWM pin of the second PWM control chip, the source electrode S of the second power tube Q2 is grounded, the first terminal 5 of the secondary side of the first flyback transformer T1 is connected with the positive electrode of the third diode D4, the negative electrode of the third diode D4 is connected with one end of the first capacitor C2 and the high-voltage output end VH, the second terminal 4 of the secondary side of the first flyback transformer T1 is connected with the other end of the first capacitor C2 and the low-voltage output end VL, the first terminal 5 of the secondary side of the second flyback transformer T2 is connected with the positive electrode of the fourth diode D5, the negative electrode of the fourth diode D5 is connected with one end of the second capacitor C3 and the high-voltage output end VH, and the second terminal 4 of the secondary side of the second flyback transformer T2 is connected with the other end of the second capacitor C3 and the low-voltage output end VL.
By adopting the technical scheme, the two flyback transformers are connected in parallel to the positive electrode of the photovoltaic power supply, and the circuits of the two flyback transformers are set to be in the same working mode, so that the transmission power of the whole circuit is improved, and the problem of insufficient transmission power of a single-stage flyback topological structure is solved; and the heating problem of components is also improved, so that the whole circuit is more stable and reliable.
Further, the cathode of the transient suppression diode D1 is connected to one end of the first inductor L1 and one end of the second inductor L2, the other end of the first inductor L1 is connected to the cathode of the first diode D2, and the other end of the second inductor L2 is connected to the cathode of the second diode D3.
Through adopting above-mentioned technical scheme, all set up the inductance on the second wiring end circuit of two flyback transformers primary sides, form the balanced bridge with two inductances through transient suppression diode to balance two flyback transformers, make two flyback transformers can synchronous output.
Further, one end of the first inductor L1 adjacent to the first diode D2 is connected to the third capacitor C4, the other end of the third capacitor C4 is grounded, one end of the second inductor L2 adjacent to the second diode D3 is connected to the fourth capacitor C5, and the other end of the fourth capacitor C5 is grounded.
By adopting the technical scheme, the capacitor is arranged at the power tube in parallel to form the protection circuit, so that the peak voltage generated during the on/off of the transformer can be effectively clamped, the energy loss can not be generated, the power device can be effectively protected from being damaged, and the overall power conversion efficiency is improved.
In summary, the utility model has the following beneficial effects:
1. in the utility model, the two flyback transformers are connected in parallel to the positive electrode of the photovoltaic power supply, and the circuits of the two flyback transformers are set to be the same, so that the transmission power of the whole circuit is improved, and the problem of insufficient transmission power of a single-stage flyback topological structure is solved; the heating problem of components is also improved, so that the whole circuit is more stable and reliable;
2. in the utility model, the two flyback transformers are balanced by arranging the inductors on the second terminal circuit of the primary side of the two flyback transformers and forming a balance bridge with the two inductors through the transient suppression diode, so that the two flyback transformers can synchronously output;
3. according to the utility model, the capacitor is arranged in parallel at the power tube to form the protection circuit, so that the peak voltage generated during the on/off of the transformer can be effectively clamped, the energy loss can not be generated, the power device can be effectively protected from being damaged, and the overall power conversion efficiency is improved.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
As shown in fig. 1, the embodiment of the utility model discloses a flyback transformer parallel circuit, which comprises a photovoltaic power supply, an electrolytic capacitor C1, a transient suppression diode D1, a first flyback transformer T1, a second flyback transformer T2, a first diode D2, a second diode D3, a third diode D4, a fourth diode D5, a first power tube Q1, a second power tube Q2, a first inductor L1, a second inductor L2, a first capacitor C2, a second capacitor C3, a third capacitor C4 and a fourth capacitor C5, wherein the first flyback transformer T1 and the second flyback transformer T2 are arranged on a photovoltaic power supply positive electrode circuit in parallel, so that the transmission power of the whole circuit can be effectively improved.
When the photovoltaic power supply is specifically arranged, the negative pole PV of the photovoltaic power supply is grounded, the positive pole PV+ of the photovoltaic power supply is connected with the positive pole of the electrolytic capacitor C1, the positive pole of the transient suppression diode D1, the first terminal 1 of the primary side of the first flyback transformer T1 and the first terminal 1 of the primary side of the second flyback transformer T2, the negative pole of the electrolytic capacitor C1 is grounded, and the negative pole of the transient suppression diode D1 is respectively connected with one ends of the first inductor L1 and the second inductor L2, namely the first inductor L1 and the second inductor L2 are connected with the negative pole of the transient suppression diode D1 in parallel.
The other end of the first inductor L1 is connected with the cathode of the first diode D2, the anode of the first diode D2 is connected with the second wiring end 2 of the primary side of the first flyback transformer T1, the second wiring end 2 of the primary side of the first flyback transformer T1 is connected with the drain electrode D of the first power tube Q1, the grid electrode G of the first power tube Q1 is connected with the PWM pin of the first PWM control chip, the source electrode S of the first power tube Q1 is grounded, one end of the first inductor L1 adjacent to the first diode D2 is connected with the third capacitor C4, and the other end of the third capacitor C4 is grounded. The first terminal 5 of the secondary side of the first flyback transformer T1 is connected with the positive electrode of a third diode D4, the negative electrode of the third diode D4 is connected with one end of a first capacitor C2 and a high-voltage output end VH, and the second terminal 4 of the secondary side of the first flyback transformer T1 is connected with the other end of the first capacitor C2 and a low-voltage output end VL. The connection circuit of the first flyback transformer T1 is characterized in that the first PWM control chip is used for outputting PWM signals and controlling the duty ratio of the output PWM signals, outputting the PWM signals to the grid G of the first power tube Q1, controlling the on and off of the first power tube Q1 and adjusting the high voltage time. The third capacitor C4 is arranged on the first power tube Q1 circuit in parallel to protect the first power tube Q1, so that peak voltage generated when the effective clamp transformer is turned on/off can not generate energy loss, a power device can be effectively protected from being damaged, and the overall power conversion efficiency is improved.
The other end of the second inductor L2 is connected with the cathode of a second diode D3, the anode of the second diode D3 is connected with a second wiring end 2 on the primary side of a second flyback transformer T2, the second wiring end 2 on the primary side of the second flyback transformer T2 is connected with the drain electrode D of a second power tube Q2, the grid electrode G of the second power tube Q2 is connected with a PWM pin of a second PWM control chip, the source electrode S of the second power tube Q2 is grounded, one end, close to the second diode D3, of the second inductor L2 is connected with a fourth capacitor C5, and the other end of the fourth capacitor C5 is grounded. The first wiring end 5 of the secondary side of the second flyback transformer T2 is connected with the positive electrode of a fourth diode D5, the negative electrode of the fourth diode D5 is connected with one end of a second capacitor C3 and a high-voltage output end VH, and the second wiring end 4 of the secondary side of the second flyback transformer T2 is connected with the other end of the second capacitor C3 and a low-voltage output end VL. The connection circuit of the second flyback transformer T2 is used for outputting the PWM signal and controlling the duty ratio of the output PWM signal, outputting the PWM signal to the grid G of the second power tube Q2, controlling the on and off of the second power tube Q2 and adjusting the high voltage time. The fourth capacitor C5 is arranged on the second power tube Q2 circuit in parallel to protect the second power tube Q2, so that peak voltage generated when the effective clamp transformer is turned on/off can not generate energy loss, a power device can be effectively protected from being damaged, and the overall power conversion efficiency is improved.
The primary side second terminal 2 of the first flyback transformer T1 and the primary side second terminal 2 of the second flyback transformer T2 are connected with the cathode of the transient suppression diode D1 through the first inductor L1 and the second inductor L2 respectively, and the transient suppression diode D1, the first inductor L1 and the second inductor L2 form a balance bridge, so that the first flyback transformer T1 and the second flyback transformer T2 are balanced, the first flyback transformer T1 and the second flyback transformer T2 are synchronously output, and the overall stability of a circuit is improved.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (3)
1. The flyback transformer parallel circuit comprises a photovoltaic power supply and is characterized in that: the cathode PV of the photovoltaic power supply is grounded, the anode PV+ of the photovoltaic power supply is connected with the anode of an electrolytic capacitor C1, the anode of a transient suppression diode D1, a first wiring terminal 1 of the primary side of a first flyback transformer T1 and a first wiring terminal 1 of the primary side of a second flyback transformer T2, the cathode of the electrolytic capacitor C1 is grounded, the cathode of the transient suppression diode D1 is respectively connected with the cathode of a first diode D2 and the cathode of a second diode D3, the anode of the first diode D2 is connected with the second wiring terminal 2 of the primary side of the first flyback transformer T1, the second wiring terminal 2 of the primary side of the first flyback transformer T1 is connected with the drain electrode D of a first power tube Q1, the grid electrode G of the first power tube Q1 is connected with the PWM pin of a first PWM control chip, the source electrode S of the first power tube Q1 is grounded, the anode of the second diode D3 is connected with the primary side of the second flyback transformer T2, the second terminal 2 of the primary side of the second flyback transformer T2 is connected with the drain electrode D of the second power tube Q2, the grid electrode G of the second power tube Q2 is connected with the PWM pin of the second PWM control chip, the source electrode S of the second power tube Q2 is grounded, the first terminal 5 of the secondary side of the first flyback transformer T1 is connected with the positive electrode of the third diode D4, the negative electrode of the third diode D4 is connected with one end of the first capacitor C2 and the high-voltage output end VH, the second terminal 4 of the secondary side of the first flyback transformer T1 is connected with the other end of the first capacitor C2 and the low-voltage output end VL, the first terminal 5 of the secondary side of the second flyback transformer T2 is connected with the positive electrode of the fourth diode D5, the negative electrode of the fourth diode D5 is connected with one end of the second capacitor C3 and the high-voltage output end VH, and the second terminal 4 of the secondary side of the second flyback transformer T2 is connected with the other end of the second capacitor C3 and the low-voltage output end VL.
2. The flyback transformer parallel circuit of claim 1, wherein: the cathode of the transient suppression diode D1 is connected with one end of the first inductor L1 and one end of the second inductor L2 respectively, the other end of the first inductor L1 is connected with the cathode of the first diode D2, and the other end of the second inductor L2 is connected with the cathode of the second diode D3.
3. A flyback transformer parallel circuit according to claim 2, characterized in that: one end of the first inductor L1 adjacent to the first diode D2 is connected to the third capacitor C4, the other end of the third capacitor C4 is grounded, one end of the second inductor L2 adjacent to the second diode D3 is connected to the fourth capacitor C5, and the other end of the fourth capacitor C5 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462501.2U CN219999229U (en) | 2023-06-09 | 2023-06-09 | Flyback transformer parallel circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462501.2U CN219999229U (en) | 2023-06-09 | 2023-06-09 | Flyback transformer parallel circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219999229U true CN219999229U (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321462501.2U Active CN219999229U (en) | 2023-06-09 | 2023-06-09 | Flyback transformer parallel circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219999229U (en) |
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2023
- 2023-06-09 CN CN202321462501.2U patent/CN219999229U/en active Active
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