CN222029826U - Voltage conversion circuit, vehicle-mounted charger and vehicle - Google Patents
Voltage conversion circuit, vehicle-mounted charger and vehicle Download PDFInfo
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- CN222029826U CN222029826U CN202323527931.0U CN202323527931U CN222029826U CN 222029826 U CN222029826 U CN 222029826U CN 202323527931 U CN202323527931 U CN 202323527931U CN 222029826 U CN222029826 U CN 222029826U
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Abstract
The present disclosure relates to a voltage conversion circuit, a vehicle-mounted charger, and a vehicle, the voltage conversion circuit including: the high-order filter circuit comprises a controller, a switching transformer, a primary side branch and a high-order filter branch, wherein the primary side branch is connected with a primary winding of the switching transformer, the controller is connected with the primary side branch and used for controlling the primary side branch to output target switching current, and the high-order filter branch is connected with the primary side branch and the primary winding and used for filtering out high-order harmonic waves generated by the primary side branch in the process of generating the target switching current, so that the high-order harmonic waves generated by the primary side branch in the process of generating the target switching current alternating current can be effectively filtered out through the high-order filter branch, the interference of the high-order harmonic waves in the voltage conversion circuit is eliminated, the peak voltage of the target switching current is reduced, the electromagnetic interference in the voltage conversion circuit is reduced, and the electromagnetic compatibility of the voltage conversion circuit is improved.
Description
Technical Field
The disclosure relates to the technical field of voltage conversion, in particular to a voltage conversion circuit, a vehicle-mounted charger and a vehicle.
Background
With the development of technology, DC-DC (direct current to direct current) conversion circuits are increasingly used in applications, and direct currents with different voltages can be provided by the DC-DC conversion circuits, for example: a switching transformer is usually arranged in the existing DC-DC conversion circuit, and the DC power input into the DC-DC conversion circuit needs to be converted into switching current to drive the switching transformer, so that in the process of generating switching current, higher harmonic electromagnetic interference can be generated in the DC-DC conversion circuit and spread to other surrounding circuits, thereby influencing the EMC (Electro Magnetic Compatibility ) performance of the whole machine.
Disclosure of utility model
In order to achieve the above object, the present disclosure provides a voltage conversion circuit, a vehicle-mounted charger, and a vehicle.
A first aspect of the present disclosure provides a voltage conversion circuit including: the device comprises a controller, a switching transformer, a primary side branch and a high-order filtering branch, wherein the primary side branch is connected with a primary winding of the switching transformer;
and the controller is connected with the primary side branch and is used for controlling the primary side branch to output target switching current.
The high-order filtering branch is connected with the primary side branch and the primary winding and is used for filtering out high-order harmonic waves generated by the primary side branch in the process of generating the target switching current.
Optionally, the primary side branch comprises a first bridge arm and a second bridge arm;
And the confluence ends of the first bridge arm and the second bridge arm are used as positive and negative input ends of the primary side branch, the midpoint of the first bridge arm and the midpoint of the second bridge arm are used as output ends of the primary side branch, and the output ends of the primary side branch are connected with the high-order filtering branch and the primary winding.
Optionally, the output end of the primary side branch comprises a first terminal and a second terminal, the first terminal is connected with the first end of the primary winding through a preset wire, and the second terminal is connected with the second end of the primary winding;
The first end of the high-order filtering branch is connected with the first wiring terminal, and the second end of the high-order filtering branch is connected with the second wiring terminal.
Optionally, a first end of the higher order filtering branch is connected to a first end of the primary winding, and a second end of the higher order filtering branch is connected to a second end of the primary winding.
Optionally, the higher order filtering branch comprises a filtering capacitor or a plurality of filtering capacitors, and the plurality of filtering capacitors are connected in series or in parallel.
The high-order filtering branch circuit comprises a target resistor and at least one filtering capacitor, and the target resistor is connected with the filtering capacitor in series.
Optionally, the voltage conversion circuit further includes a preset rectifying branch, and the preset rectifying branch is connected with an input end of the primary side branch, and is used for converting the accessed first alternating current into the target direct current, and inputting the target direct current into the primary side branch.
Optionally, the voltage conversion circuit further comprises a preset rectifying branch and a preset converting branch,
The output end of the preset conversion branch is connected with the input end of the primary side branch, and the input end of the preset conversion branch is connected with the preset rectification branch; or alternatively
The input end of the preset converting branch is connected with the input end of the primary side branch and the output end of the preset rectifying branch, and the input end of the preset rectifying branch is used for being connected with an alternating current power supply.
A second aspect of the present disclosure provides a vehicle-mounted charger, the vehicle-mounted charger comprising: the voltage conversion circuit described in the first aspect above.
A third aspect of the present disclosure provides a vehicle comprising: the voltage conversion circuit described in the first aspect above.
Through above-mentioned technical scheme, voltage conversion circuit includes: the high-order filter circuit comprises a controller, a switching transformer, a primary side branch and a high-order filter branch, wherein the primary side branch is connected with a primary winding of the switching transformer, the controller is connected with the primary side branch and used for controlling the primary side branch to output target switching current, and the high-order filter branch is connected with the primary side branch and the primary winding and used for filtering out high-order harmonic waves generated by the primary side branch in the process of generating the target switching current, so that the high-order harmonic waves generated by the primary side branch in the process of generating the target switching current can be effectively filtered out through the high-order filter branch, interference of the high-order harmonic waves in a voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic diagram illustrating the connection of a voltage conversion circuit according to an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the connection of a voltage conversion circuit according to the embodiment shown in FIG. 1;
FIG. 3 is a schematic diagram of a voltage conversion circuit shown in an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic diagram of the connection of a voltage conversion circuit according to the embodiment shown in FIG. 3;
FIG. 5 is a schematic diagram of the connection of another voltage conversion circuit shown in accordance with the embodiment of FIG. 3;
FIG. 6 is a schematic diagram of the connection of a voltage conversion circuit according to the embodiment shown in FIG. 5;
FIG. 7 is a block diagram of an onboard battery charger, according to an exemplary embodiment of the present disclosure;
Fig. 8 is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure.
Description of the reference numerals
101. Controller 102 switch transformer
103. First bridge arm of primary side branch 1031
1032. Second bridge arm 104 high order filtering branch
A first terminal B second terminal
C1 first capacitor Q1 first switch tube
Q2 second switching tube Q3 third switching tube
Q4 fourth switching tube Q5 fifth switching tube
Q6 sixth switching tube C2 second capacitor
C3 third capacitor C4 fourth capacitor
Cp filter capacitor 105 presets rectification branch
106 Preset switching branch
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
Fig. 1 is a schematic diagram illustrating connection of a voltage conversion circuit according to an exemplary embodiment of the present disclosure, and as shown in fig. 1, the voltage conversion circuit may include: a controller 101, a switching transformer 102, a primary side branch 103 and a higher order filtering branch 104, the primary side branch 103 being connectable to a primary winding of the switching transformer 102; the controller 101 may be connected to the primary side branch 103, and is configured to control the primary side branch 103 to output a target switching current; the higher order filtering branch 104 may be connected to the primary side branch 103 and the primary winding, and is configured to filter higher order harmonics generated by the primary side branch 103 in the process of generating the target switching current.
Wherein the higher harmonics may typically be harmonics of integer multiples of the target switching current frequency (fundamental frequency), such as: the target switching current frequency is 100kHz, and the higher harmonic wave can be a harmonic wave with the frequency of 200kHz, 300kHz, 500kHz or 1.7 MHz. The higher order filter leg 104 may include one or more filter capacitors connected in series or parallel, and may also include a target resistor connected in series with at least one filter capacitor. According to the calculation formula of the capacitance impedance:
Zc＝1/(2πfC)
Where Zc represents the impedance value of the capacitor, f represents the frequency, and C represents the capacitance value. As can be seen, the larger the frequency is, the smaller the impedance of the capacitor in the higher order filtering branch 104 is, and the higher order harmonic frequency is far greater than the target switching current frequency, so that the higher order filtering branch 104 can filter the higher order harmonic in the primary side branch 103, and effectively reduce the interference of the higher order harmonic. In general, the filter capacitance in the higher order filter branch 104 may be between 100pF and 1000pF, and the withstand voltage is greater than 2KV. In order to facilitate heat dissipation and improve withstand voltage, a mode of connecting a plurality of filter capacitors in series may be preferably adopted.
It should be noted that, the controller 101 sends a PWM (Pulse Width Modulation ) control signal to the primary side branch 103 at a preset frequency, and when the primary side branch 103 does receive the PWM control signal, the switching tube in the primary side branch 103 is alternately turned on, so that the direct current input to the voltage conversion circuit is converted into the target switching current. In the process of converting the direct current input to the voltage conversion circuit into the target switching current, the primary side branch 103 may generate a fundamental wave of the target switching current and a higher harmonic wave on a wire connected to the primary winding of the switching transformer 102, where the frequency of the higher harmonic wave is generally an integer multiple of the fundamental wave frequency, and the higher harmonic wave on a wire connected to the primary winding of the switching transformer 102 by the primary side branch 103 may cause electromagnetic interference to surrounding circuits. The higher filtering branch 104 can be connected with the primary side branch 103 and the primary winding, and filters out higher harmonic waves generated by the primary side branch 103 in the process of generating the target switching current, so that electromagnetic interference caused by the higher harmonic waves to the voltage conversion circuit is eliminated. The voltage conversion circuit may further include a secondary leg connected to the secondary winding of the switching transformer 102, the switching transformer 102 providing a voltage to the secondary leg through electromagnetic coupling of the primary winding and the secondary winding. The secondary side branch may generally include circuitry such as rectification, buck, or filtering as known in the art, and may take a variety of different forms, and the particular implementation of the secondary side branch is widely used in the art and is not intended to be limiting in this disclosure.
According to the technical scheme, the higher harmonic wave generated in the process of generating the target switching current by the primary side branch can be effectively filtered through the higher filtering branch, interference of the higher harmonic wave in the voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Fig. 2 is a schematic connection diagram of a voltage conversion circuit according to the embodiment shown in fig. 1, where, as shown in fig. 2, the primary side branch 103 may include a first leg 1031 and a second leg 1032, the bus ends of the first leg 1031 and the second leg 1032 may be used as positive and negative input ends of the primary side branch 103, the midpoint of the first leg 1031 and the midpoint of the second leg 1032 may be used as output ends of the primary side branch 103, and the output ends of the primary side branch 103 may be connected with the higher filtering branch 104 and the primary winding.
The direct current can be connected to the voltage conversion circuit via the input of the primary leg 103. The direct current is typically high voltage direct current or may be low voltage direct current. The high voltage direct current in the present disclosure may be a direct current of greater than or equal to 100V, and the low voltage direct current may be a direct current of less than 50V. The output end of the primary leg 103 may include a first terminal a, which may be connected to the first end of the primary winding through a preset wire, and a second terminal B, which may be connected to the second end of the primary winding. One embodiment of the higher order filtering branch 104 may be that a first end of the higher order filtering branch 104 may be connected to the first terminal a, and a second end of the higher order filtering branch 104 may be connected to the second terminal B. Another embodiment of the high order filter leg 104 may be that a first end of the high order filter leg 104 may be connected to a first end of the primary winding, and a second end of the high order filter leg 104 may be connected to a second end of the primary winding.
It should be noted that, the midpoint of the first bridge arm 1031 may be used as the first terminal a, the midpoint of the second bridge arm 1032 may be used as the second terminal B, the first terminal a may be connected to the different-name end of the primary winding through a preset wire, the converging ends of the first bridge arm 1031 and the second bridge arm 1032 may be used as the positive and negative input ends of the primary side branch 103 for connecting an external power source, the first end of the higher filtering branch 104 is connected to the first terminal a and the different-name end of the primary winding, the first end of the higher filtering branch 104 is connected to the first terminal B and the same-name end of the primary winding, the primary side branch 103 converts the direct current in the input voltage conversion circuit into the target switching current through the first bridge arm 1031 and the second bridge arm 1032, and the higher filtering branch 104 filters the higher harmonic on the preset wire in the process of converting the primary side branch 103 into the target switching current.
For example, the first leg 1031 may include a first upper leg and a first lower leg, the second leg 1032 may include a second upper leg and a second lower leg, the controller may control the first upper leg and the second lower leg to be conducted, the current direction of the preset wire and the primary winding may flow from the first terminal a to the second terminal B, the current direction of the preset wire and the primary winding may flow from the second terminal B to the first terminal a in the case of controlling the first lower leg and the second upper leg to be conducted, the current direction of the preset wire and the primary winding may also be changed along with the controller in the case of controlling the first upper leg and the second lower leg to be conducted alternately with the first lower leg and the second upper leg at a preset switching frequency, so that a target switching current is generated in the preset wire and the primary winding (for example, in the case of controlling the voltage at the input end of the primary leg 103 to be HV, the voltage between the first terminal a and the second terminal B may be changed drastically between +hv and-HV, and the voltage direction between the first terminal a and the second terminal B may be changed between the preset wire and the preset wire according to the switching control operating frequency, and the target current may be generated in the reverse direction in the primary winding, and the high harmonic may be generated in the process. The filter capacitor, or a plurality of parallel filter capacitors, or a plurality of series filter capacitors can be connected between the first terminal A and the second terminal B, and higher harmonics in the preset wire and the primary winding can be filtered through the capacitor. The preset wire and the higher harmonic wave in the primary winding can be filtered by connecting a filter capacitor and a resistor in series.
According to the technical scheme, the higher harmonic wave generated in the process of generating the target switching current by the primary side branch can be effectively filtered through the higher filtering branch, interference of the higher harmonic wave in the voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Fig. 3 is a schematic diagram of a voltage conversion circuit according to an exemplary embodiment of the present disclosure, where, as shown in fig. 3, the primary leg 103 may include a first capacitor C1, a voltage positive access terminal, and a voltage negative access terminal; the midpoint of the first bridge arm 1031 is connected with the midpoint of the second bridge arm 1032 through the primary winding of the switching transformer 102 and a preset wire, and the first bridge arm 1031 may include a first switching tube Q1 and a second switching tube Q2 connected in series; the second bridge arm 1032 may include a third switching tube Q3 and a fourth switching tube Q4 connected in series; the higher order filtering branch 104 may include a filtering capacitor Cp; the secondary leg may include a fifth switching tube Q5, a sixth switching tube Q6, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a voltage positive output and a voltage negative output, and the secondary winding of the switching transformer 102 may include a first secondary winding and a second secondary winding connected in series. the first end of the first switching tube Q1 can be connected with the first end of the third switching tube Q3 to form a first confluence end, the first confluence end can be connected with a voltage positive electrode access end, the first end of the second switching tube Q2 can be connected with the first end of the fourth switching tube Q4 to form a second confluence end, the second confluence end can be connected with a voltage negative electrode access end, one end of the first capacitor C1 can be connected with the first confluence end and the voltage positive electrode access end, one end of the first capacitor C1 can be connected with the second confluence end and the voltage negative electrode access end, the first capacitor C1 can be used for filtering high-voltage waves and higher harmonics input through the voltage positive electrode access end, the voltage positive electrode access end and the voltage negative electrode access end, For connecting to an external power source; One end of the filter capacitor Cp is connected with the second end of the first switching tube Q1 and the second end of the second switching tube Q2, the other end of the filter capacitor Cp is connected with the second end of the third switching tube Q3 and the second end of the fourth switching tube Q4 and the homonymous end of the primary winding, the controller 101 can alternately conduct the first switching tube Q1 and the fourth switching tube Q4 and the second switching tube Q2 and the third switching tube Q3 with a preset switching frequency, the primary side branch 103 can convert direct current in a preset lead and the primary winding into target switching current, and higher harmonic waves can be generated in the preset lead and the primary winding, the filter capacitor Cp can be used for converting direct current of the input voltage conversion circuit into target switching current when the primary side branch 103 converts direct current of the input voltage conversion circuit, And filtering out higher harmonics on a preset lead so as to eliminate interference generated by the higher harmonics in the voltage conversion circuit. The connection point of the first secondary winding and the second secondary winding is connected with a voltage positive electrode output end, the first end of a fifth switching tube Q5 is connected with the same-name end of the first secondary winding, the second end of the fifth switching tube Q5 is connected with the first end of a sixth switching tube Q6 and a voltage negative electrode output end, the second end of the sixth switching tube Q6 is connected with the different-name end of the second secondary winding, one end of a second capacitor C2 is connected with the connection point of the first secondary winding and the second secondary winding, one end of the second capacitor C2 is connected with the second end of the fifth switching tube Q5 and the first end of the sixth switching tube Q6, a third capacitor C3 is connected with the fifth switching tube Q5 in parallel, and a fourth capacitor C4 is connected with the sixth switching tube Q6 in parallel; the switching transformer 102 may provide a switching current to the secondary side branch through the secondary winding, and the secondary side branch may provide a high voltage dc or a low voltage dc, which is determined according to a load connected to an output terminal of the secondary side branch, by converting the switching current provided by the secondary winding into a dc.
Fig. 4 is a schematic connection diagram of a voltage conversion circuit according to the embodiment shown in fig. 3, where, as shown in fig. 4, the voltage conversion circuit may further include a preset rectifying branch 105, where the preset rectifying branch 105 may be connected to an input end of the primary side branch 103, and is configured to convert the accessed first ac power into the target dc power, and input the target dc power to the primary side branch 103.
The target direct current may be a direct current output by a preset rectifying branch. The preset rectifying branch circuit can be connected with an external alternating current power supply, and the external alternating current power supply can be an external alternating current charging pile or other alternating current power supplies.
It should be noted that, the preset rectifying branch 105 may convert the first ac power input into the preset rectifying branch 105 into the target dc power, and input the target dc power into the primary side branch 103. The voltage conversion circuit can be used for being connected with charging equipment to charge a vehicle-mounted charger or a vehicle where the voltage conversion circuit is located. The specific embodiment of the preset rectifying leg 105 is common knowledge in the art and is widely used in the art, and the present disclosure does not limit the specific embodiment of the preset rectifying leg 105.
According to the technical scheme, the higher harmonic wave generated in the process of generating the target switching current and the alternating current by the primary side branch can be effectively filtered through the higher filtering branch, interference of the higher harmonic wave in the voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Fig. 5 is a schematic connection diagram of another voltage conversion circuit according to the embodiment shown in fig. 3, where, as shown in fig. 5, the voltage conversion circuit may further include a preset rectifying branch 105 and a preset converting branch 106, an output end of the preset converting branch 106 is connected to an input end of the primary side branch 103, an input end of the preset converting branch 106 is connected to the preset rectifying branch 105, and an input end of the preset rectifying branch 105 may be used to connect to an ac power supply.
It should be noted that, the preset converting branch 106 is used for another dc voltage conversion, and inputs the target dc voltage to the primary side branch 103. The specific embodiment of the preset switching leg 106 may be a similar circuit form of the present patent or may be another circuit form, for example, an LLC switching circuit (resonant switching circuit), which is widely known in the art and widely used in the art, and the present disclosure does not limit the specific embodiment of the preset switching leg 106.
According to the technical scheme, the higher harmonic wave generated in the process of generating the target switching current and the alternating current by the primary side branch can be effectively filtered through the higher filtering branch, interference of the higher harmonic wave in the voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Fig. 6 is a schematic connection diagram of a voltage conversion circuit according to the embodiment shown in fig. 5, as shown in fig. 6, an input end of the preset converting branch 106 may also be connected to an input end of the primary side branch 103 and an output end of the preset rectifying branch 105, and an input end of the preset rectifying branch 105 may be used to connect to an ac power source.
It should be noted that, the preset rectifying branch 105 may input the target dc into the primary side branch 103 and the preset converting branch 106, and the primary side branch 103 converts the target dc into the target switching current, so that the voltage converting circuit outputs the dc to the load connected to the output end of the secondary side branch through the secondary side branch. The preset switching leg 106 filters the target dc power and provides a stable dc power to a load connected to the preset switching leg 106.
According to the technical scheme, the higher harmonic wave generated in the process of generating the target switching current and the alternating current by the primary side branch can be effectively filtered through the higher filtering branch, interference of the higher harmonic wave in the voltage conversion circuit is eliminated, peak voltage of the target switching current is reduced, electromagnetic interference in the voltage conversion circuit is reduced, and electromagnetic compatibility of the voltage conversion circuit is improved.
Fig. 7 is a block diagram of a vehicle-mounted charger according to an exemplary embodiment of the present disclosure, as shown in fig. 7, the vehicle-mounted charger includes: a voltage conversion circuit as hereinbefore described with reference to any one of figures 1 to 6.
FIG. 8 is a block diagram of a vehicle, as shown in FIG. 8, according to an exemplary embodiment of the present disclosure, the vehicle including: a voltage conversion circuit as hereinbefore described with reference to any one of figures 1 to 6.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A voltage conversion circuit, comprising: the device comprises a controller, a switching transformer, a primary side branch and a high-order filtering branch, wherein the primary side branch is connected with a primary winding of the switching transformer;
The controller is connected with the primary side branch and is used for controlling the primary side branch to output target switching current;
the high-order filtering branch is connected with the primary side branch and the primary winding and is used for filtering out high-order harmonic waves generated by the primary side branch in the process of generating the target switching current.
2. The voltage conversion circuit of claim 1, wherein the primary leg comprises a first leg and a second leg;
And the confluence ends of the first bridge arm and the second bridge arm are used as positive and negative input ends of the primary side branch, the midpoint of the first bridge arm and the midpoint of the second bridge arm are used as output ends of the primary side branch, and the output ends of the primary side branch are connected with the high-order filtering branch and the primary winding.
3. The voltage conversion circuit according to claim 2, wherein the output terminal of the primary leg comprises a first terminal and a second terminal, the first terminal being connected to the first terminal of the primary winding by a predetermined wire, the second terminal being connected to the second terminal of the primary winding;
The first end of the high-order filtering branch is connected with the first wiring terminal, and the second end of the high-order filtering branch is connected with the second wiring terminal.
4. The voltage conversion circuit according to claim 2, wherein a first end of the higher order filter leg is connected to a first end of the primary winding and a second end of the higher order filter leg is connected to a second end of the primary winding.
5. The voltage conversion circuit according to claim 1, wherein the higher order filter branch comprises one filter capacitor or a plurality of filter capacitors connected in series or in parallel.
6. The voltage conversion circuit according to claim 1, wherein the higher order filter branch comprises a target resistance and at least one filter capacitor, the target resistance being connected in series with the filter capacitor.
7. The voltage conversion circuit according to any one of claims 1 to 6, further comprising a preset rectifying branch connected to an input of the primary branch for converting the first ac power into the target dc power, and inputting the target dc power into the primary branch.
8. The voltage conversion circuit according to any one of claims 1 to 6, further comprising a preset rectifying branch and a preset converting branch,
The output end of the preset conversion branch is connected with the input end of the primary side branch, and the input end of the preset conversion branch is connected with the preset rectification branch; or alternatively
The input end of the preset converting branch is connected with the input end of the primary side branch and the output end of the preset rectifying branch, and the input end of the preset rectifying branch is used for being connected with an alternating current power supply.
9. A vehicle-mounted charger, characterized in that the vehicle-mounted charger comprises: a voltage conversion circuit as claimed in any one of claims 1 to 8 above.
10. A vehicle, characterized in that the vehicle comprises: a voltage conversion circuit as claimed in any one of claims 1 to 8 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323527931.0U CN222029826U (en) | 2023-12-21 | 2023-12-21 | Voltage conversion circuit, vehicle-mounted charger and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323527931.0U CN222029826U (en) | 2023-12-21 | 2023-12-21 | Voltage conversion circuit, vehicle-mounted charger and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN222029826U true CN222029826U (en) | 2024-11-19 |
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ID=93442015
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323527931.0U Active CN222029826U (en) | 2023-12-21 | 2023-12-21 | Voltage conversion circuit, vehicle-mounted charger and vehicle |
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| Country | Link |
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| CN (1) | CN222029826U (en) |
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2023
- 2023-12-21 CN CN202323527931.0U patent/CN222029826U/en active Active
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