CN220857665U - Secondary power circuit architecture of bidirectional portable inverter - Google Patents
Secondary power circuit architecture of bidirectional portable inverter Download PDFInfo
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- CN220857665U CN220857665U CN202322473340.3U CN202322473340U CN220857665U CN 220857665 U CN220857665 U CN 220857665U CN 202322473340 U CN202322473340 U CN 202322473340U CN 220857665 U CN220857665 U CN 220857665U
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Abstract
The utility model discloses a secondary power circuit architecture of a bidirectional portable inverter, which comprises an isolated bidirectional inverter circuit, a first direct current conversion circuit, a second direct current conversion circuit, two diodes, a high-voltage driving chip and a controller, wherein the first direct current conversion circuit is connected with the first direct current conversion circuit; the isolated bidirectional inverter circuit is used for realizing isolated conversion between a battery power supply at a low voltage side and a bus power supply at a high voltage side; the first direct current conversion circuit adopts a non-isolated direct current converter, and a battery power supply generates a first working power supply required by low-voltage side driving and controller working through the first direct current conversion circuit; the second direct current conversion circuit adopts an isolated direct current converter, and a bus power supply generates the first working power supply and a second working power supply required by high-voltage side driving through the second direct current conversion circuit; the high-voltage driving chip is connected with the controller and used for providing the high-voltage side driving; the bus is connected with the mains supply charging port through two diodes.
Description
Technical Field
The utility model relates to the field of energy storage batteries, in particular to a secondary power circuit architecture of a bidirectional portable inverter.
Background
The battery end of the bidirectional portable inverter is a low-voltage safety system, the output end of the bidirectional portable inverter and the mains supply charging port of the bidirectional portable inverter are both high-voltage parts, and safety regulation is considered to strengthen insulation, so that the low-voltage side and the high-voltage side are isolated. In this case, a secondary power supply is required to be provided on both the low-voltage side and the high-voltage side to generate the high-voltage isolation driving. In the prior art, the two-way portable inverter usually adopts flyback DC-DC converters to generate high-voltage isolation driving, which makes the equipment difficult to miniaturize and reduces the cost.
Disclosure of utility model
In order to solve the problems, the utility model provides an optimized secondary power circuit structure of a bi-directional portable inverter, which adopts a low-cost non-isolated direct current converter at a low-voltage side so as to optimize a mode of generating high-voltage isolated driving at the low-voltage side, thereby realizing cost reduction and space saving.
The technical proposal is as follows:
A novel secondary power supply structure of a bidirectional portable inverter comprises an isolated bidirectional inverter circuit, a first direct current conversion circuit, a second direct current conversion circuit, a first diode, a second diode, a high-voltage driving chip and a controller;
The isolated bidirectional inverter circuit is used for realizing the isolated conversion between a battery power supply at a low voltage side and a bus power supply at a high voltage side and comprises an isolated coil, a low voltage side switching tube and a high voltage side switching tube, wherein the low voltage side switching tube and the high voltage side switching tube are driven by a driving signal at the low voltage side and a high voltage driving signal at the high voltage side respectively;
The first direct current conversion circuit adopts a non-isolated direct current converter, and a battery power supply generates a first working power supply required by low-voltage side driving and controller working through the first direct current conversion circuit;
The second direct current conversion circuit adopts an isolated direct current converter, and a bus power supply generates the first working power supply and a second working power supply required by high-voltage side driving through the second direct current conversion circuit;
The high-voltage driving chip is connected with the controller and used for providing the high-voltage side driving;
the positive electrode of the first diode is connected with a live wire interface of the mains supply charging port, and the negative electrode of the first diode is connected with the positive electrode of the bus;
And the cathode of the second diode is connected with a zero line interface of the mains supply charging port, and the anode of the second diode is connected with the cathode of the bus.
Further, the isolated bidirectional inverter circuit comprises a first transformer, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube;
The first transformer comprises a primary coil and a secondary coil;
Two ends of the primary coil are respectively connected with the negative electrode of the electrode through a first switch tube and a second switch tube; the center tap of the primary coil is directly connected with the positive electrode of the battery;
The third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching Guan Gou form a full-bridge circuit,
The second end of the third switching tube, the first end of the fourth switching tube and one end of the secondary coil are connected;
The second end of the sixth switching tube and the first end of the fifth switching tube are connected with the other end of the secondary coil;
The first end of the third switching tube and the first end of the sixth switching tube are connected with the positive electrode of the bus;
the second end of the fourth switching tube and the second end of the fifth switching tube are connected with the negative electrode of the bus;
The control ends of the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are connected to a high-voltage side driving chip, and the high-voltage side driving chip is controlled by the controller;
The switching tube comprises a body diode, wherein the positive electrode of the body diode is connected with the second end of the switching tube, and the negative electrode of the body diode is connected with the first end of the switching tube.
Further, the switching tube is a MOS tube, or an IGBT switching tube, or a SiC switching tube.
Further, the first direct current conversion circuit adopts a buck type power management chip.
Further, the voltage of the first working power supply is +5V or +3.3V.
Further, the second direct current conversion circuit adopts a flyback isolated DC-DC converter.
Further, the voltage range of the second working power supply is +12V to +24V.
The technical effects are as follows:
The secondary power circuit architecture of the bidirectional portable inverter flexibly applies the characteristics of a main loop isolation inverter circuit architecture, optimizes the mode of generating high-voltage isolation driving at a low-voltage side, combines the commercial power and a bus into one path for supplying power, only needs a group of flyback DC-DC converters in the whole loop, simplifies the secondary power circuit architecture of the bidirectional portable inverter, and realizes cost optimization and space saving.
Drawings
FIG. 1 is a schematic block diagram of a bi-directional portable inverter of the present utility model;
FIG. 2 is an example of an isolated bi-directional inverter circuit of the present utility model;
FIG. 3 is a first direct current converter example of the present utility model;
fig. 4 is a second dc conversion circuit example of the present utility model.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model.
The utility model will now be further described with reference to the drawings and detailed description.
As shown in fig. 1 to 4, the present utility model provides a secondary power circuit architecture of a bi-directional portable inverter. The high-voltage power supply comprises an isolated bidirectional inverter circuit 100, a first direct-current conversion circuit 200, a second direct-current conversion circuit 300, a first diode D1, a second diode D2, a high-voltage driving chip 600, a controller 700 and the like.
The isolated bi-directional inverter circuit 100 is used to achieve isolated switching between the battery power BAT+/BAT-on the low voltage side and the BUS power BUS+/BUS-on the high voltage side. The isolated bidirectional inverter circuit 100 includes an isolated coil T1, low-voltage side switching transistors Q1 and Q2, and high-voltage side switching transistors Q3, Q4, Q5, and Q6, where the low-voltage side switching transistors Q1 and Q2 and the high-voltage side switching transistors Q3, Q4, Q5, and Q6 are driven by a low-voltage side driving signal and a high-voltage side driving signal, respectively.
The first direct current conversion circuit 200 adopts a non-isolated direct current converter, and a battery power supply BAT+/BAT-generates a first working power supply OUT required by low-voltage side driving and controller working through the first direct current conversion circuit 200;
the second dc conversion circuit 300 adopts an isolated dc converter, and the BUS power bus+/BUS-generates the first operating power OUT and the second operating power +15v required for high-voltage side driving through the second dc conversion circuit 300.
The high voltage driving chip 600 is connected to the controller 700 to provide the high voltage side driving. The required power sources for the high voltage driving chip 600 include a second operating power source +15v and a BUS power source bus+/BUS-.
The positive electrode of the first diode D1 is connected with a live wire interface L_grid of a mains supply charging port, and the negative electrode of the first diode D1 is connected with a positive electrode BUS+ of a BUS power supply;
And the cathode of the second diode D2 is connected with the zero line interface N_grid of the mains supply charging port, and the anode of the second diode D2 is connected with the cathode BUS of the busbar power supply.
In this embodiment, the power management chip in the first dc conversion circuit 200 uses a low-voltage Buck power chip, for example (a plurality of corresponding chip types are given), and the voltage of the first operating power OUT is typically +5v or +3.3v. The low-voltage side adopts a common buck chip to carry out direct current conversion, and the cost or the space saving is much less than that of adopting a flyback DC-DC converter.
The second DC conversion circuit 300 may be a flyback isolated DC-DC conversion circuit comprising a separate device or a power management chip. In this example, a flyback isolated DC-DC conversion circuit composed of separate devices is shown, outputting a first operating power OUT for supplying power to the low-side driving and controller 700, and outputting a second operating power +15v for supplying power to the high-voltage driving chip 600, respectively.
In a specific application, the voltage range of the second operating power source used by the high voltage driving chip 600 is typically +12v to +24v.
In this example, the switching transistors Q1 to Q6 and the like are all MOS transistors. In specific applications, the switching tubes of Q1 to Q6 and the like can also adopt switching tubes of IGBT, siC and the like.
As shown in fig. 1 to 4, the secondary power circuit architecture of the bi-directional portable inverter of the present utility model. When the inversion output (battery discharge) is needed, the battery power supply BAT+/BAT-can generate a power supply driven by the low-voltage side and a first power supply OUT for the CPU to work through the first direct-current conversion circuit 200, after the two power supplies work, the main circuits of the low-voltage side MOS tubes Q1 and Q2 can work, the high-voltage side MOS tubes can generate bus voltage without power supply thanks to the body diodes of the high-voltage side H-bridge MOS tubes Q3, Q4, Q5 and Q6, after the bus voltage exists, the second direct-current conversion circuit 300 starts to work, and generates a second power supply +15V required by the high-voltage side drive of the rear end and a first power supply OUT required by the low-voltage side drive and the controller 700 to complete the whole construction of the secondary power supply of the whole bidirectional inverter. When the battery is not powered and needs to be charged, the mains supply charging port and the BUS BUS are both high voltage, the mains supply can directly pass through the two diodes D1 and D2 to be directly subjected to half-wave rectification to the upper side of the BUS BUS, so that the second direct current conversion circuit 300 starts to work, low-voltage power supply for high-voltage side driving and isolation can be provided, the controller 700 is powered on to work, the high-voltage driving chip 600 works, the MOS transistors Q3, Q4, Q5 and Q6 are driven, the body diodes of the low-voltage MOS transistors Q1 and Q2 are rectified to charge the battery, the battery end is powered on, the low-voltage side power supply is activated, and the construction of the secondary power supply of the whole bidirectional inverter is completed.
In summary, the secondary power circuit architecture of the medium bidirectional portable inverter of the present embodiment has the following technical effects:
The secondary power circuit architecture of the bidirectional portable inverter flexibly applies the characteristics of a main loop isolation inverter circuit architecture, optimizes the mode of generating high-voltage isolation driving at a low-voltage side, combines the commercial power and a bus into one path for supplying power, only needs a group of flyback DC-DC converters in the whole loop, simplifies the secondary power circuit architecture of the bidirectional portable inverter, and realizes cost optimization and space saving.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. The utility model provides a two-way portable inverter's secondary power circuit structure which characterized in that: the device comprises an isolated bidirectional inverter circuit, a first direct current conversion circuit, a second direct current conversion circuit, a first diode, a second diode, a high-voltage driving chip and a controller;
The isolated bidirectional inverter circuit is used for realizing the isolated conversion between a battery power supply at a low voltage side and a bus power supply at a high voltage side and comprises an isolated coil, a low voltage side switching tube and a high voltage side switching tube, wherein the low voltage side switching tube and the high voltage side switching tube are driven by a driving signal at the low voltage side and a high voltage driving signal at the high voltage side respectively;
The first direct current conversion circuit adopts a non-isolated direct current converter, and a battery power supply generates a first working power supply required by low-voltage side driving and controller working through the first direct current conversion circuit;
The second direct current conversion circuit adopts an isolated direct current converter, and a bus power supply generates the first working power supply and a second working power supply required by high-voltage side driving through the second direct current conversion circuit;
The high-voltage driving chip is connected with the controller and used for providing the high-voltage side driving;
the positive electrode of the first diode is connected with a live wire interface of the mains supply charging port, and the negative electrode of the first diode is connected with the positive electrode of the bus;
And the cathode of the second diode is connected with a zero line interface of the mains supply charging port, and the anode of the second diode is connected with the cathode of the bus.
2. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the isolated bidirectional inverter circuit comprises a first transformer, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube;
The first transformer comprises a primary coil and a secondary coil;
Two ends of the primary coil are respectively connected with the negative electrode of the electrode through a first switch tube and a second switch tube; the center tap of the primary coil is directly connected with the positive electrode of the battery;
The third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching Guan Gou form a full-bridge circuit,
The second end of the third switching tube, the first end of the fourth switching tube and one end of the secondary coil are connected;
The second end of the sixth switching tube and the first end of the fifth switching tube are connected with the other end of the secondary coil;
The first end of the third switching tube and the first end of the sixth switching tube are connected with the positive electrode of the bus;
the second end of the fourth switching tube and the second end of the fifth switching tube are connected with the negative electrode of the bus;
The control ends of the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are connected to a high-voltage side driving chip, and the high-voltage side driving chip is controlled by the controller;
The switching tube comprises a body diode, wherein the positive electrode of the body diode is connected with the second end of the switching tube, and the negative electrode of the body diode is connected with the first end of the switching tube.
3. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the switching tube is a MOS tube, or an IGBT switching tube, or a SiC switching tube.
4. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the first direct current conversion circuit adopts a buck type power management chip.
5. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the voltage of the first working power supply is +5V or +3.3V.
6. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the second direct current conversion circuit adopts a flyback isolated DC-DC converter.
7. The bi-directional portable inverter secondary power circuit architecture of claim 1, wherein: the voltage range of the second working power supply is +12V to +24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322473340.3U CN220857665U (en) | 2023-09-12 | 2023-09-12 | Secondary power circuit architecture of bidirectional portable inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322473340.3U CN220857665U (en) | 2023-09-12 | 2023-09-12 | Secondary power circuit architecture of bidirectional portable inverter |
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| Publication Number | Publication Date |
|---|---|
| CN220857665U true CN220857665U (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322473340.3U Active CN220857665U (en) | 2023-09-12 | 2023-09-12 | Secondary power circuit architecture of bidirectional portable inverter |
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| Country | Link |
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| CN (1) | CN220857665U (en) |
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2023
- 2023-09-12 CN CN202322473340.3U patent/CN220857665U/en active Active
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