Voltage regulation circuit, electronic equipment and vehicle

Abstract

The invention relates to the technical field of charging, in particular to a voltage regulation circuit, electronic equipment and a vehicle. The voltage regulating circuit comprises a three-phase three-wire system motor and a three-phase bridge arm circuit, and the three-phase three-wire system motor and the three-phase bridge arm circuit form a loop; the three-phase bridge arm circuit comprises a first bridge arm, a second bridge arm and a third bridge arm; the upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are connected with a positive port of a direct current charging port; the upper bridge arm of the third bridge arm is connected with the positive port of the battery port; the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm, the lower bridge arm of the third bridge arm, the negative electrode port of the direct current charging port and the negative electrode port of the battery port are connected and grounded. The three-phase bridge arm circuit is used for adjusting the voltage output by the battery port.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technology, and more specifically, to a voltage regulating circuit, an electronic device and a vehicle. Background Art

[0002] In order to adapt to the different output voltage levels of different DC charging devices, it is necessary to adjust the voltage to boost or buck to meet the battery charging requirements. The current buck-boost scheme for motor charging requires two different topologies, which requires higher device costs during production. In addition, the use of the N line in the current buck-boost scheme will generate EMC interference. Summary of the invention

[0003] One object of the present disclosure is to solve the problem that DC charging requires two sets of topology equipment and N lines.

[0004] According to one aspect of the present disclosure, there is provided a voltage regulating circuit, comprising: a three-phase three-wire motor and a three-phase bridge arm circuit, wherein the three-phase three-wire motor and the three-phase bridge arm circuit form a loop;

[0005] The three-phase bridge arm circuit comprises a first bridge arm, a second bridge arm and a third bridge arm;

[0006] The upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are connected to the positive electrode port of the DC charging port;

[0007] The upper bridge arm of the third bridge arm is connected to the positive terminal of the battery port;

[0008] The lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm, the lower bridge arm of the third bridge arm, the negative electrode port of the DC charging port and the negative electrode port of the battery port are connected and grounded.

[0009] The three-phase bridge arm circuit is used to adjust the voltage output by the battery port.

[0010] Optionally, the three-phase three-wire motor and the three-phase bridge arm circuit form a loop, including:

[0011] A bridge arm midpoint of the first bridge arm is connected to a first end of a first winding of the three-phase three-wire motor;

[0012] A bridge arm midpoint of the second bridge arm is connected to a first end of a second winding of the three-phase three-wire motor;

[0013] The bridge arm midpoint of the third bridge arm is connected to the first end of the third winding of the three-phase three-wire motor;

[0014] The second end of the first winding, the second end of the second winding and the second end of the third winding are connected.

[0015] Optionally, the upper bridge arm of the third bridge arm is connected to the upper bridge arm of the second bridge arm through a first switch.

[0016] Optionally, in case of charging the battery at the battery port, the first switch is disconnected;

[0017] When the battery drives the three-phase three-wire motor, the first switch is closed.

[0018] Optionally, the voltage regulation circuit further includes a first capacitor, which is connected in parallel between the third bridge arm and the battery port.

[0019] Optionally, when the voltage regulating circuit is used for boosting, the on-off timing of each cycle of the three-phase bridge arm circuit includes a first stage and a second stage;

[0020] In the first stage, the switch tubes in the upper bridge arm of the first bridge arm, the upper bridge arm of the second bridge arm and the lower bridge arm of the third bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the upper bridge arm of the third bridge arm are turned off;

[0021] In the second stage, the switch tubes in the upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the third bridge arm are turned off.

[0022] Optionally, when the voltage regulating circuit is used for voltage reduction, the on-off timing of each cycle of the three-phase bridge arm circuit includes a third stage and a fourth stage;

[0023] In the third stage, the switch tubes in the upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the third bridge arm are turned off;

[0024] In the fourth stage, the switch tubes in the first bridge arm, the second bridge arm and the third bridge arm are turned off.

[0025] Optionally, in the case where the voltage regulating circuit is used for boosting, the time of the first stage and the second stage of each cycle is determined by the voltage input to the DC charging port and the target voltage output from the battery port;

[0026] In the case where the voltage regulating circuit is used for voltage reduction, the time of the third stage and the fourth stage of each cycle is determined by the voltage input to the DC charging port and the target voltage output from the battery port.

[0027] According to a second aspect of the present disclosure, an electronic device is provided, comprising the steps of the voltage regulating circuit as described in any one of the first aspects.

[0028] According to a third aspect of the present disclosure, a vehicle is provided, comprising a power battery and the voltage regulating circuit according to any one of the first aspects, wherein the power battery is connected to a battery port of the voltage regulating circuit.

[0029] Optionally, the three-phase three-wire motor in the voltage regulation circuit is any three-phase three-wire motor in the vehicle, and the three-phase bridge arm circuit is a drive circuit corresponding to any three-phase three-wire motor.

[0030] One technical effect of the present disclosure is that a voltage regulating circuit is provided, including a three-phase three-wire motor and a three-phase bridge arm circuit, wherein two bridge arms of the three-phase bridge arm circuit are connected to a DC charging port, and the other bridge arm is connected to a battery port. At the same time, the three-phase bridge arm circuit is also connected to the three-phase three-wire motor, and the three-phase bridge arm circuit is used to adjust the output voltage of the battery port. In this example, through the above-mentioned voltage regulating circuit, the current input into the charging port can be adjusted to the size of the charging voltage after passing through the three-phase bridge arm and the motor, so that it can be stepped up or stepped down, solving the problem that two charging circuits are required for DC charging to adapt to charging piles of different specifications, saving production costs, and at the same time, in this embodiment, the three-phase three-wire motor does not need to set an N line, so the problem of electromagnetic interference in the charging circuit is also solved.

[0031] Other features and advantages of the embodiments of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the embodiments of the present disclosure.

[0033] Figure 1 is a schematic structural diagram of a voltage regulating circuit according to an embodiment;

[0034] Figure 2 is a schematic diagram of current direction of a voltage regulating circuit in a first stage according to an embodiment;

[0035] Figure 3 is a schematic diagram of the current direction of a voltage regulating circuit in a second stage according to an embodiment;

[0036] Figure 4 is a schematic diagram of the current direction of a voltage regulating circuit in a third stage according to an embodiment;

[0037] Figure 5is a schematic diagram of the current direction of a voltage regulating circuit in a fourth stage according to an embodiment;

[0038] Figure 6 is a schematic structural diagram of a voltage regulation circuit according to an embodiment. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0041] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0044] The embodiment of the present application discloses a voltage regulation circuit 100, including a three-phase three-wire motor 20 and a three-phase bridge arm circuit 10, wherein the three-phase three-wire motor 20 and the three-phase bridge arm circuit 10 form a loop; the three-phase bridge arm circuit 10 includes a first bridge arm 11, a second bridge arm 12 and a third bridge arm 13; the upper bridge arm of the first bridge arm 11 and the upper bridge arm of the second bridge arm 12 are connected to the positive port of the DC charging port; the upper bridge arm of the third bridge arm 13 is connected to the positive port of the battery port; the lower bridge arm of the first bridge arm 11, the lower bridge arm of the second bridge arm 12, the lower bridge arm of the third bridge arm 13, the negative port of the DC charging port and the negative port of the battery port are connected and grounded. The three-phase bridge arm circuit 10 is used to regulate the voltage output by the battery port.

[0045] In this embodiment, if Figure 1As shown, the three-phase bridge arm circuit 10 includes a first bridge arm 11, a second bridge arm 12 and a third bridge arm 13, wherein the upper bridge arms of the first bridge arm 11 and the second bridge arm 12 are connected to the positive electrode of the DC charging port, and the lower bridge arms are connected to the negative electrode of the DC charging port and grounded. The third bridge arm in the three-phase bridge bottom circuit is connected to the battery port, specifically, the upper bridge arm of the third bridge arm 13 is connected to the positive electrode of the battery port, the lower bridge arm is connected to the negative electrode of the battery port, and the lower bridge arms of other bridge arms are connected to the ground.

[0046] In this embodiment, the upper and lower bridge arms in the three-phase bridge arm circuit 10 may include at least one switch tube, which may be a MOS tube or an IGBT tube.

[0047] In this embodiment, the DC charging port can be connected to a DC charging device such as a DC charging pile, and the battery port can be connected to a battery to be charged.

[0048] In this embodiment, the three-phase three-wire motor 20 forms a loop with the three-phase bridge arm circuit 10, including: the midpoint of the first bridge arm 11 is connected to the first end of the first winding L1 of the three-phase three-wire motor 20; the midpoint of the second bridge arm 12 is connected to the first end of the second winding L2 of the three-phase three-wire motor 20; the midpoint of the third bridge arm 13 is connected to the first end of the third winding L3 of the three-phase three-wire motor 20; the second end of the first winding L1, the second end of the second winding L2 and the second end of the third winding L3 are connected.

[0049] In this embodiment, if Figure 1 As shown, one end of the three motor windings in the three-phase three-wire motor 20 is respectively connected to the midpoint of a bridge arm, that is, they are respectively connected to the three-phase bridge arm circuit through three wires, and the other ends of the three motor windings are connected to each other without connecting the N wire.

[0050] In this embodiment, the voltage regulating circuit 100 further includes a first capacitor C2 , and the first capacitor C2 is connected in parallel between the third bridge arm 13 and the battery port.

[0051] In this embodiment, the voltage regulating circuit 100 further includes a second capacitor, which is connected in parallel with the first bridge arm 11 to protect the charging circuit.

[0052] In an example of the present embodiment, when the voltage regulating circuit 100 is used for boosting, the on-off timing of each cycle of the three-phase bridge arm circuit 10 includes a first stage and a second stage; in the first stage, the switch tubes in the upper bridge arm of the first bridge arm 11, the upper bridge arm of the second bridge arm 12 and the lower bridge arm of the third bridge arm 13 are turned on, and the switch tubes in the lower bridge arm of the first bridge arm 11, the lower bridge arm of the second bridge arm 12 and the upper bridge arm of the third bridge arm 13 are turned off; in the second stage, the switch tubes in the upper bridge arm of the first bridge arm 11 and the upper bridge arm of the second bridge arm 12 are turned on, and the switch tubes in the lower bridge arm of the first bridge arm 11, the lower bridge arm of the second bridge arm 12 and the third bridge arm 13 are turned off.

[0053] For example, Figure 2 and Figure 3 As shown, when the voltage regulating circuit 100 is used for boosting, each control cycle can be divided into two stages. In the first stage, the switch tubes in the upper bridge arm of the first bridge arm 11, the upper bridge arm of the second bridge arm 12 and the lower bridge arm of the third bridge arm 13 are turned on, and the other switch tubes are turned off, that is, Q1, Q2 and Q6 are turned on, and Q3, Q4, and Q5 are turned off. In this stage, the current on the coil winding in the three-phase three-wire motor 20 will increase linearly, which is equivalent to charging the first winding L1, the second winding L2 and the third winding L3. In the second stage, Q1 and Q2 are turned on, and Q3, Q4, Q5, and Q6 are turned off. At this time, although the switch tube in the upper bridge arm of the inductor through the third bridge arm 13 is in the off state, the charged winding can charge the battery and the first capacitor C2 through the Q3 body diode. At the same time, the charging voltage input from the DC charging port will be charged through the loop, and the charging current is superimposed to achieve the boosting of the charging current.

[0054] In an example of the present embodiment, when the voltage regulation circuit 100 is used for step-down, the on-off timing of each cycle of the three-phase bridge arm circuit 10 includes a third stage and a fourth stage; in the third stage, the switch tubes in the upper bridge arm of the first bridge arm 11 and the upper bridge arm of the second bridge arm 12 are turned on, and the switch tubes in the lower bridge arm of the first bridge arm 11, the lower bridge arm of the second bridge arm 12 and the third bridge arm 13 are turned off; in the fourth stage, the switch tubes in the first bridge arm 11, the second bridge arm 12 and the third bridge arm 13 are turned off.

[0055] For example, Figure 4 and Figure 5As shown, when the voltage regulating circuit 100 is used for voltage reduction, each control cycle can be divided into two stages. In the third stage, the switch tubes in the upper bridge arm of the first bridge arm 11 and the upper bridge arm of the second bridge arm 12 are turned on, and the other switch tubes are turned off, that is, Q1 and Q2 are turned on, and Q3, Q4, Q5 and Q6 are turned off. In this stage, the current on the coil winding in the three-phase three-wire motor 20 will increase linearly, which is equivalent to charging the first winding L1, the second winding L2 and the third winding L3, and the charging current will continue to charge the battery from the body diode of Q3. In the fourth stage, Q1, Q2, Q3, Q4, Q5, and Q6 are turned off. At this time, the battery is charged by the three-phase inductor and the first capacitor C2. The current output by the inductor reaches the battery port through the body diode of Q3, and then passes through the body diodes of Q4, Q5, and Q6 to form a loop to achieve voltage reduction.

[0056] In an example of this embodiment, when the voltage regulation circuit is used for boosting, the time of the first and second stages of each cycle is determined by the voltage input to the DC charging port and the target voltage output from the battery port; when the voltage regulation circuit is used for stepping down, the time of the third and fourth stages of each cycle is determined by the voltage input to the DC charging port and the target voltage output from the battery port.

[0057] For example, when the voltage regulation circuit 100 is used as a boost circuit, Q1 and Q2 are always in the on state, Q3, Q4, and Q5 are always in the off state, and only the on-off state of Q6 is different between the first stage and the second stage. At this time, the duty cycle of Q6 can be calculated by the target voltage to be output from the battery port and the voltage input to the DC charging port, thereby determining the respective time of the two stages in the same cycle.

[0058] When the voltage regulation circuit 100 is used as a step-down circuit, Q3, Q4, Q5, and Q6 are always in the off state, and only the on-off states of Q1 and Q2 are different between the third stage and the fourth stage. At this time, the duty cycle of Q1 and Q2 can be calculated through the target voltage to be output from the battery port and the voltage input to the DC charging port to determine the time of the third stage and the fourth stage in the same cycle.

[0059] In this example, through the above-mentioned voltage regulation circuit 100, the current input into the charging port can pass through the three-phase bridge arm and the motor, and the charging voltage can be adjusted accordingly, so that it can be stepped up or down, thereby solving the problem that DC charging requires two charging circuits to adapt to charging piles of different specifications, saving production costs. At the same time, in this embodiment, the three-phase three-wire motor 20 does not need to be set with an N line, thereby also solving the problem of electromagnetic interference in the charging circuit.

[0060] In an example of this embodiment, the upper bridge arm of the third bridge arm 13 is connected to the upper bridge arm of the second bridge arm 12 through a first switch.

[0061] In an example of this embodiment, when the battery is charged, the first switch is opened; when the battery drives the three-phase three-wire motor 20, the first switch is closed.

[0062] like Figure 6 As shown, the first bridge arm 11, the second bridge arm 12 and the third bridge arm 13 can be connected in parallel with each other, and a first switch is provided between the second bridge arm 12 and the third bridge arm 13. In this embodiment, the voltage regulating circuit 100 can disconnect the first switch when charging the battery to charge the battery connected to the battery port. When the battery needs to drive the motor to run, the first switch can be closed, so that the three-phase bridge arm circuit 10 acts as a driving circuit of the motor to drive it.

[0063] In this example, the voltage regulating circuit 100 can be reused with the driving circuits of other motors, thereby further saving components and costs.

[0064] An embodiment of the present application also provides a vehicle, which includes a power battery and any one of the voltage regulation circuits 100 in the voltage regulation circuit 100 embodiments, the power battery is connected to the battery port in the voltage regulation circuit 100, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0065] In this embodiment, the three-phase three-wire motor in the voltage regulation circuit is any three-phase three-wire motor in a vehicle, and the three-phase bridge arm circuit is a drive circuit corresponding to any three-phase three-wire motor.

[0066] In this example, the three-phase three-wire motor 20 can be any three-phase three-wire motor in the vehicle. For example, when the drive motor and steering motor in the vehicle are three-phase three-wire motors, the corresponding drive motor and steering motor, and their corresponding three-phase bridge arm circuits can be used as voltage regulation circuits. In this way, the DC charging circuit and the three-phase three-wire motor 20 and the drive circuit can be reused, saving costs, reducing components, and reducing vehicle body weight and volume.

[0067] Each embodiment in the present disclosure is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and equipment embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0068] The above describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0069] The embodiments of the present disclosure may be systems, methods and / or computer program products. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the embodiments of the present disclosure.

[0070] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0071] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0072] The computer program instructions for performing the operation of the embodiments of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of a computer-readable program instruction, and the electronic circuit may execute a computer-readable program instruction, thereby realizing various aspects of the embodiments of the present disclosure.

[0073] Various aspects of the embodiments of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0074] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0075] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0076] The flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to multiple embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of an instruction, and a part of a module, a program segment or an instruction contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of the boxes in the block diagram and / or the flowchart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that it is equivalent to implement it by hardware, implement it by software, and implement it by combining software and hardware.

[0077] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A voltage regulating circuit, characterized in that: include: A three-phase three-wire motor and a three-phase bridge arm circuit, wherein the three-phase three-wire motor and the three-phase bridge arm circuit form a loop; The three-phase bridge arm circuit comprises a first bridge arm, a second bridge arm and a third bridge arm; The upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are connected to the positive electrode port of the DC charging port; The upper bridge arm of the third bridge arm is connected to the positive terminal of the battery port; The lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm, the lower bridge arm of the third bridge arm, the negative electrode port of the DC charging port and the negative electrode port of the battery port are connected and grounded. The three-phase bridge arm circuit is used to adjust the voltage output by the battery port.

2. The voltage regulating circuit according to claim 1, characterized in that: The three-phase three-wire motor and the three-phase bridge arm circuit form a loop, including: A bridge arm midpoint of the first bridge arm is connected to a first end of a first winding of the three-phase three-wire motor; A bridge arm midpoint of the second bridge arm is connected to a first end of a second winding of the three-phase three-wire motor; The bridge arm midpoint of the third bridge arm is connected to the first end of the third winding of the three-phase three-wire motor; The second end of the first winding, the second end of the second winding and the second end of the third winding are connected.

3. The voltage regulating circuit according to claim 1, characterized in that: The upper bridge arm of the third bridge arm is connected to the upper bridge arm of the second bridge arm through a first switch.

4. The voltage regulating circuit according to claim 3, characterized in that: In case of charging the battery at the battery port, the first switch is opened; When the battery drives the three-phase three-wire motor, the first switch is closed.

5. The voltage regulating circuit according to claim 1, characterized in that: The voltage regulating circuit further includes a first capacitor, which is connected in parallel between the third bridge arm and the battery port.

6. The voltage regulating circuit according to claim 1, characterized in that: In the case where the voltage regulating circuit is used for boosting, the on-off timing sequence of each cycle of the three-phase bridge arm circuit includes a first stage and a second stage; In the first stage, the switch tubes in the upper bridge arm of the first bridge arm, the upper bridge arm of the second bridge arm and the lower bridge arm of the third bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the upper bridge arm of the third bridge arm are turned off; In the second stage, the switch tubes in the upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the third bridge arm are turned off.

7. The voltage regulating circuit according to claim 1, characterized in that: When the voltage regulating circuit is used for voltage reduction, the on-off timing of each cycle of the three-phase bridge arm circuit includes a third stage and a fourth stage; In the third stage, the switch tubes in the upper bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm are turned on, and the switch tubes in the lower bridge arm of the first bridge arm, the lower bridge arm of the second bridge arm and the third bridge arm are turned off; In the fourth stage, the switch tubes in the first bridge arm, the second bridge arm and the third bridge arm are turned off.

8. The voltage regulating circuit according to claim 6 or 7, characterized in that: In the case where the voltage regulating circuit is used for boosting, the time of the first stage and the second stage of each cycle is determined by the voltage input by the DC charging port and the target voltage output by the battery port; In the case where the voltage regulating circuit is used for voltage reduction, the time of the third stage and the fourth stage of each cycle is determined by the voltage input to the DC charging port and the target voltage output from the battery port.

9. An electronic device, characterized in that: The invention comprises the voltage regulating circuit as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: It comprises a power battery and the voltage regulating circuit according to any one of claims 1 to 8, wherein the power battery is connected to a battery port of the voltage regulating circuit.

11. The vehicle according to claim 10, characterized in that The three-phase three-wire motor in the voltage regulation circuit is any three-phase three-wire motor in the vehicle, and the three-phase bridge arm circuit is a drive circuit corresponding to any three-phase three-wire motor.

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