A power supply circuit, controller and vehicle

Abstract

The utility model embodiment provides a kind of power supply circuit, controller and vehicle, and the power supply circuit includes upper bridge drive circuit, including upper bridge transformer, upper bridge spare output component and upper bridge voltage stabilizing circuit;Upper bridge transformer is used to power supply to upper bridge spare output component and upper bridge voltage stabilizing circuit;Lower bridge drive circuit, including lower bridge transformer, lower bridge spare output component and lower bridge voltage stabilizing circuit;Lower bridge transformer is used to power supply to lower bridge spare output component and lower bridge voltage stabilizing circuit;Upper bridge spare output component is used to when lower bridge transformer is abnormal, to lower bridge voltage stabilizing circuit power supply;Lower bridge spare output component is used to when upper bridge transformer is abnormal, to upper bridge voltage stabilizing circuit power supply;It is guaranteed between upper and lower bridge loop electrical isolation, avoid the influence of magnetic field coupling to voltage stability, realizes backup redundant power supply.

Description

Technical Field

[0001] This utility model relates to the field of motor controller technology, and in particular to a power supply circuit, controller, and vehicle. Background Technology

[0002] With the rapid development of technology, the requirements for power supply stability of various electronic devices and power systems are becoming increasingly stringent. In related technologies, the voltage regulation circuit of the upper bridge drive circuit of the traditional bridge arm drive power supply circuit relies only on the upper bridge transformer for power supply, and the voltage regulation circuit of the lower bridge drive circuit relies only on the lower bridge transformer for power supply. When a transformer fails to work properly due to a fault, the corresponding voltage regulation circuit will stop operating due to the loss of power input, causing the bridge arm drive circuit to fail, which may lead to equipment operation interruption, functional abnormality, or even safety risks. Utility Model Content

[0003] This utility model provides a power supply circuit, a controller, and a vehicle, aiming to improve the power supply stability problem of traditional bridge arm drive power supply circuits in the prior art.

[0004] To address the aforementioned problems, this utility model discloses a power supply circuit, which includes: The upper bridge drive circuit includes an upper bridge transformer, an upper bridge backup output component, and an upper bridge voltage regulator circuit; the upper bridge transformer is connected to the upper bridge backup output component and the upper bridge voltage regulator circuit respectively, and the upper bridge transformer is used to supply power to the upper bridge backup output component and the upper bridge voltage regulator circuit; The lower bridge drive circuit includes a lower bridge transformer, a lower bridge backup output component, and a lower bridge voltage regulator circuit; the lower bridge transformer is connected to the lower bridge backup output component and the lower bridge voltage regulator circuit respectively; the lower bridge transformer is used to supply power to the lower bridge backup output component and the lower bridge voltage regulator circuit; The upper bridge backup output component is connected to the lower bridge voltage regulator circuit and is used to supply power to the lower bridge voltage regulator circuit when the lower bridge transformer is abnormal. The lower bridge backup output component is connected to the upper bridge voltage regulator circuit and is used to supply power to the upper bridge voltage regulator circuit when the upper bridge transformer is abnormal.

[0005] Optionally, the input terminal of the bridge transformer is connected to a first power supply to obtain the voltage of the first power supply and output a first output voltage according to the voltage of the first power supply. The output terminal of the upper bridge voltage regulator circuit is connected to the first load and is used to supply power to the first load according to the first output voltage.

[0006] Optionally, the upper bridge voltage regulator circuit includes multiple circuits, and each upper bridge voltage regulator circuit outputs a different voltage to a different first load.

[0007] Optionally, the upper bridge voltage regulator circuit includes: The first voltage regulator module is connected to the first load and is used to obtain the positive working voltage of the first load, determine whether the positive working voltage is greater than a first preset voltage, and if the positive working voltage is greater than the first preset voltage, stop supplying power to the first load. The second voltage regulator module is connected to the first load and is used to output a target negative voltage to the negative terminal of the first load based on the first output voltage. Optionally, the first voltage regulator module includes: First resistor; The first switch has its input terminal connected to one end of the upper bridge transformer and one end of the first resistor, and its control terminal connected to the other end of the first resistor. A first voltage regulator component, one end of which is connected to the other end of the first resistor and the control terminal of the first switch, and the other end of the first voltage regulator component is connected to ground. The first capacitor has its first terminal connected to the output terminal of the first switch, its second terminal connected to the positive terminal of the first load, and its third terminal connected to ground.

[0008] Optionally, the second voltage regulator module includes: The second voltage regulator component is connected at one end of the first voltage regulator component to the upper bridge transformer. The second resistor has one end connected to the other end of the second voltage regulator component, and the other end of the second resistor is connected to ground. The third resistor, one end of which is connected to one end of the second resistor and the other end of the second voltage regulator component; The second switch has its control terminal connected to the other end of the third resistor, and its input terminal connected to the other end of the second resistor. A fourth resistor, one end of which is connected to one end of the second voltage regulator component, and the other end of which is connected to the output terminal of the second switch; The second capacitor has its first terminal connected to one end of the fourth resistor, its second terminal connected to the negative terminal of the first load, and its third terminal connected to ground. Optionally, the input terminal of the lower bridge transformer is connected to the second power supply to obtain the voltage of the second power supply and output a second output voltage according to the voltage of the second power supply; The lower bridge voltage regulator circuit has its output terminal connected to the second load, and is used to supply power to the second load according to the second output voltage.

[0009] Optionally, the lower bridge voltage regulator circuit includes multiple circuits, and each lower bridge voltage regulator circuit outputs a different voltage to a different second load.

[0010] This utility model also discloses a controller, which includes the power supply circuit as described above.

[0011] This utility model also discloses a vehicle, which includes the controller as described above.

[0012] The embodiments of this utility model have the following advantages: This invention establishes a cross-backup power supply mechanism by setting up an upper-bridge backup output component and a lower-bridge backup output component, connecting the upper-bridge backup output component to the lower-bridge voltage regulator circuit, and vice versa. When a transformer malfunctions, the backup power supply component of the other bridge arm can promptly supply power to its voltage regulator circuit, avoiding the power loss of the corresponding voltage regulator circuit due to a single transformer failure, thereby improving the reliability and stability of the entire power supply circuit. It also ensures electrical isolation between the upper and lower bridge circuits, avoids the impact of magnetic field coupling on voltage stability, and achieves redundant backup power supply. Attached Figure Description

[0013] Figure 1 This is a structural block diagram of a power supply circuit provided in one embodiment of the present utility model; Figure 2 This is a structural block diagram of another power supply circuit provided in one embodiment of the present utility model; Figure 3 This is a structural block diagram of an upper bridge voltage regulator circuit provided in one embodiment of the present invention; Figure 4 This is a structural block diagram of a controller provided in one embodiment of the present invention; Figure 5 This is a structural block diagram of a vehicle provided in one embodiment of the present utility model.

[0014] Explanation of reference numerals in the attached figures: 10 - Power supply circuit, 20 - Controller, 30 - Vehicle; 101 - Upper bridge drive circuit, 102 - Lower bridge drive circuit; 1011-Upper bridge transformer, 1013-Upper bridge voltage regulator circuit, 1012-Upper bridge backup output component, 1014-First power supply; 1021-Lower bridge transformer, 1023-Lower bridge voltage regulator circuit, 1022-Lower bridge backup output component, 1024-Second power supply; 10131 - First upper-bridge voltage regulator circuit, 10132 - Second upper-bridge voltage regulator circuit, 10133 - Third upper-bridge voltage regulator circuit; 101311 - First voltage regulator module, 101312 - Second voltage regulator module; 1013111 - First switch, 1013112 - First voltage regulator assembly; 1013121 - Second switch, 1013122 - Second voltage regulator assembly; R1 - First resistor, C1 - First filter module, R2 - Second resistor, R3 - Third resistor, R4 - Fourth resistor, C2 - Second filter module. Detailed Implementation

[0015] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0016] Currently, most motor controller drive power supply solutions in the industry use flyback topology closed-loop control plus a multi-transformer direct output. Although the multi-transformer outputs are relatively independent, there are still magnetic fields that are coupled to each other. When one of the circuits is heavily loaded, the voltage in this circuit will fluctuate significantly and will also affect the output voltage of other circuits. To solve this problem, the existing technology uses a flyback power supply chip for primary-side feedback closed-loop control. Both the upper and lower bridge power supplies are powered by the same flyback chip. However, the upper and lower bridge power supplies are prone to common cause failures and have poor reliability.

[0017] This utility model provides a power supply circuit, which may include: an upper bridge drive circuit, including an upper bridge transformer, an upper bridge backup output component, and an upper bridge voltage regulator circuit; the upper bridge transformer is connected to the upper bridge backup output component and the upper bridge voltage regulator circuit respectively, and the upper bridge transformer is used to supply power to the upper bridge backup output component and the upper bridge voltage regulator circuit; a lower bridge drive circuit, including a lower bridge transformer, a lower bridge backup output component, and a lower bridge voltage regulator circuit; the lower bridge transformer is connected to the lower bridge backup output component and the lower bridge voltage regulator circuit respectively, and the lower bridge transformer is used to supply power to the lower bridge backup output component and the lower bridge voltage regulator circuit; the upper bridge backup output component is connected to the lower bridge voltage regulator circuit, and is used to supply power to the lower bridge voltage regulator circuit when the lower bridge transformer is abnormal; the lower bridge backup output component is connected to the upper bridge voltage regulator circuit, and is used to supply power to the upper bridge voltage regulator circuit when the upper bridge transformer is abnormal. By setting up backup output components for the upper and lower bridges, and connecting the upper backup output component to the lower bridge voltage regulator circuit, and vice versa, a cross-backup power supply mechanism is formed. When a transformer malfunctions, the backup power supply component of the other bridge arm can promptly supply power to its voltage regulator circuit, avoiding the problem of power loss in the corresponding voltage regulator circuit due to a single transformer failure, thereby improving the reliability and stability of the entire power supply circuit. It also ensures electrical isolation between the upper and lower bridge circuits, avoids the impact of common-cause failures, and achieves redundant backup power supply.

[0018] Reference Figure 1 The diagram shows a structural block diagram of a power supply circuit 10 provided by this utility model. This power supply circuit may include: The upper bridge drive circuit 101 includes an upper bridge transformer 1011, an upper bridge backup output component 1012, and an upper bridge voltage regulator circuit 1013; the upper bridge transformer 1011 is connected to the upper bridge backup output component 1012 and the upper bridge voltage regulator circuit 1013 respectively, and the upper bridge transformer 1011 is used to supply power to the upper bridge backup output component 1012 and the upper bridge voltage regulator circuit 1013; The lower bridge drive circuit 102 includes a lower bridge transformer 1021, a lower bridge backup output component 1022, and a lower bridge voltage regulator circuit 1023; the lower bridge transformer 1021 is connected to the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023 respectively; the lower bridge transformer 1021 is used to supply power to the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023; The upper bridge backup output component 1012 is connected to the lower bridge voltage regulator circuit 1023 and is used to supply power to the lower bridge voltage regulator circuit 1023 when the lower bridge transformer 1021 is abnormal. The lower bridge backup output component 1022 is connected to the upper bridge voltage regulator circuit 1013 and is used to supply power to the upper bridge voltage regulator circuit 1013 when the upper bridge transformer 1011 is abnormal.

[0019] In this embodiment of the present invention, the upper bridge drive circuit 101 consists of three parts: an upper bridge transformer 1011, an upper bridge backup output component 1012, and an upper bridge voltage regulator circuit 1013. The upper bridge transformer 1011 is the core power supply component in the circuit, ensuring that the two components can obtain a stable power supply under normal working conditions to maintain their respective functions.

[0020] The lower bridge drive circuit 102 includes a lower bridge transformer 1021, a lower bridge backup output component 1022, and a lower bridge voltage regulator circuit 1023. The lower bridge transformer 1021 is connected to the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023 respectively, so that the lower bridge transformer 1021 can supply power to the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023, ensuring the power requirements of each component of the lower bridge drive circuit under normal operating conditions.

[0021] Abnormalities in the lower bridge transformer 1021 may include hardware malfunctions in the lower bridge transformer 1021 or abnormal power supply to the input voltage of the lower bridge transformer 1021. Abnormalities in the bridge transformer 1011 may include hardware malfunctions in the bridge transformer 1011 or abnormal power supply to the input voltage of the bridge transformer 1011. The upper bridge backup output component can cope with possible abnormalities in the lower bridge transformer 1021. When it is detected that the lower bridge transformer 1021 is not working properly, such as when a power supply abnormality occurs, the upper bridge backup output component 1012 will start and provide power support to the lower bridge voltage regulator circuit 1023 in a timely manner, so as to avoid the lower bridge voltage regulator circuit 1023 from being powered off due to the abnormality of the lower bridge transformer 1021, thereby maintaining the stable operation of the lower bridge related circuits.

[0022] The function of the lower bridge backup output component 1022 is similar to that of the upper bridge backup output component 1012. It is connected to the upper bridge voltage regulator circuit 1013 and can provide power to the upper bridge voltage regulator circuit 1013 in the event of an abnormality in the upper bridge transformer 1011, such as when it cannot supply power normally. This ensures that the upper bridge voltage regulator circuit 1013 will not stop working due to the failure of the upper bridge transformer 1011, thereby ensuring the stable operation of the relevant parts of the upper bridge drive circuit.

[0023] This utility model discloses a power supply circuit that, by setting up an upper bridge backup output component and a lower bridge backup output component, connects the upper bridge backup output component to the lower bridge voltage regulator circuit, and the lower bridge backup output component to the upper bridge voltage regulator circuit, forming a cross-backup power supply mechanism. When a transformer malfunctions, the backup power supply component of the other bridge arm can promptly supply power to its voltage regulator circuit, avoiding the problem of power loss in the corresponding voltage regulator circuit due to a single transformer failure, thereby improving the reliability and stability of the entire power supply circuit. It also ensures electrical isolation between the upper and lower bridge circuits, avoids the impact of magnetic field coupling on voltage stability, and achieves redundant backup power supply.

[0024] In one embodiment of this utility model, the input terminal of the upper bridge transformer is connected to the first power supply to obtain the voltage of the first power supply and output a first output voltage according to the voltage of the first power supply; the upper bridge voltage regulator circuit has its output terminal connected to the first load to supply power to the first load according to the first output voltage.

[0025] In this embodiment of the present invention, the first load can be a power device. Such devices are usually electronic components that can withstand large power and are used for power conversion and control. Common ones include insulated gate bipolar transistors (IGBTs), power MOSFETs, thyristors (SCRs), triacs, power diodes, etc. The specific type can be set according to the user's needs.

[0026] The input terminal of the bridge transformer 1011 is connected to the first power supply 1014, and can obtain the required voltage from the first power supply 1014. Then, the bridge transformer 1011 will output the first output voltage after its own transformation and other processing based on the obtained voltage from the first power supply 1014. It should be noted that the bridge transformer can step up or step down the voltage of the first power supply to obtain the output voltage.

[0027] The output of the upper bridge voltage regulator circuit 1013 is connected to the first load, and can receive the first output voltage from the upper bridge transformer 1011, and supply power to the first load based on the first output voltage to ensure that the first load can obtain stable power support.

[0028] This invention can supply power to the upper bridge voltage regulator circuit through a transformer, thereby ensuring that the upper bridge voltage regulator circuit supplies power to the first load according to the obtained voltage, so that the first load can work in a stable power environment.

[0029] In one embodiment of this utility model, the first power source is a low-voltage battery.

[0030] In this embodiment of the present invention, the first power supply 1014 can be a low-voltage battery. When the first power supply is a low-voltage battery, the upper bridge transformer 1011 can obtain the low-voltage DC power output from the low-voltage battery. Then, the upper bridge transformer 1011 can perform voltage conversion based on the voltage provided by the low-voltage battery through internal electromagnetic induction and other processes, and output a first output voltage that is adapted to the working requirements of the upper bridge backup output component 1012 and the upper bridge voltage regulator circuit 1013, thereby powering the subsequent circuit components.

[0031] In this embodiment of the invention, the low-voltage battery can provide a stable and reliable initial power source for the upper bridge drive circuit, which can reduce the impact of power fluctuations on the operation of subsequent circuit components to a certain extent, and improve the safety and stability of the entire power supply circuit.

[0032] In one embodiment of this utility model, the upper bridge voltage regulator circuit may include multiple circuits, and each upper bridge voltage regulator circuit outputs a different voltage to a different first load.

[0033] In this embodiment of the utility model, such as Figure 2 The diagram shows a structural block diagram of another power supply circuit provided by this utility model. In this power supply circuit, the upper bridge voltage regulator circuit 1013 may include multiple upper bridge voltage regulator circuits 10131, 10132, and 10133. Each upper bridge voltage regulator circuit will perform targeted voltage regulation and adjustment on the first output voltage according to the voltage requirements of the first load it is connected to. Since different first loads require different voltages when working, some may require a lower operating voltage, while others require a relatively higher voltage. Each upper bridge voltage regulator circuit 1013 can convert the first output voltage into a specific voltage value adapted to the corresponding first load through the synergistic effect of its internal voltage regulating components, and then output different voltages to the different first loads connected to it, ensuring that each first load can obtain a power supply that matches its operating parameters.

[0034] This invention can output different voltages through multiple bridge voltage regulator circuits, accurately meeting the personalized voltage requirements of different primary loads and avoiding problems such as load malfunction, performance degradation, or even damage caused by voltage mismatch. At the same time, this targeted power supply method reduces unnecessary voltage conversion losses and improves energy utilization efficiency. In addition, the independent operation of multiple voltage regulator circuits reduces the impact of a single circuit failure on the power supply of other loads, further enhancing the reliability and adaptability of the entire power supply system. This allows the circuit to flexibly adapt to various types of power devices, expanding its application range.

[0035] In one embodiment of this utility model, the upper bridge voltage regulator circuit is used to stop supplying power to the first load when the operating voltage of the first load is greater than a preset voltage.

[0036] In this invention, the upper bridge voltage regulator circuit 1013 also integrates an overvoltage protection mechanism, which can monitor the working voltage of the connected first load in real time. When the working voltage of the first load exceeds the preset voltage threshold, the upper bridge voltage regulator circuit will quickly trigger the internal protection switch or related control components to cut off the power output to the first load and stop supplying power to the first load. In this process, the preset voltage is usually a safety threshold set according to the rated working voltage range and withstand voltage limit of the first load. Through continuous voltage detection and judgment, the upper bridge voltage regulator circuit ensures timely intervention when the voltage of the first load rises abnormally, so as to avoid the excessive voltage from continuously acting on the first load.

[0037] This invention provides reliable overvoltage protection for the first load, effectively preventing performance degradation, damage, or even burnout of the first load due to excessively high operating voltage, and significantly extending the service life of the first load. At the same time, it avoids cascading failures in the entire power supply circuit or related systems caused by a single load overvoltage fault, reduces the safety risks of circuit operation, improves the safety and stability of the entire power supply system, and ensures the reliability of power supply.

[0038] In one embodiment of this utility model, the upper bridge voltage regulator circuit includes: a first voltage regulator module connected to a first load, used to obtain the positive working voltage of the first load, determine whether the positive working voltage is greater than a first preset voltage, and if the positive working voltage is greater than the first preset voltage, stop supplying power to the first load; and a second voltage regulator module connected to the first load, used to output a target negative voltage to the negative terminal of the first load according to a first output voltage.

[0039] like Figure 3 The diagram shows a structural block diagram of an upper-bridge voltage regulator circuit 10131 provided by this utility model. The upper-bridge voltage regulator circuit 10131 may include a first voltage regulator module 101311, which can be connected to a first load. The first voltage regulator module 101311 can obtain the positive working voltage of the first load. During operation, the first voltage regulator module 101311 can continuously monitor this positive working voltage and compare it with a preset first voltage. When the positive working voltage of the first load exceeds the first preset voltage, the first voltage regulator module will immediately activate the protection mechanism, cut off its own power output to the first load, and thus stop supplying power to the first load. The first preset voltage is determined by combining key parameters such as the maximum safe voltage that the positive terminal of the first load can withstand and the rated working voltage range. It aims to provide accurate overvoltage protection for the positive terminal of the first load, and ensure that it can respond in time when the positive voltage rises abnormally, so as to avoid damage to the first load caused by excessive positive voltage.

[0040] In this utility model, such as Figure 3 The upper bridge voltage regulator circuit 10131 may also include a second voltage regulator module 101312. In addition to the first voltage regulator module 101311, the upper bridge voltage regulator circuit 1013 also includes a second voltage regulator module 101312. Its main function is to output a stable target negative voltage to the negative terminal of the first load based on the first output voltage output by the upper bridge transformer 1011 through internal voltage regulation and conversion. During operation, after receiving the first output voltage, the second voltage regulator module 101312 will precisely regulate the first output voltage according to the specific voltage requirements of the negative terminal of the first load to ensure that the output target negative voltage meets the working parameters of the negative terminal of the first load, providing suitable and stable power support to the negative terminal of the first load. Together with the first voltage regulator module 101311, it works on the first load to ensure that both the positive and negative terminals of the first load can obtain appropriate voltage.

[0041] In one embodiment of this utility model, the first voltage regulator module may include: a first resistor; a first switch, the input terminal of which is connected to the upper bridge transformer and one end of the first resistor, and the control terminal of the first switch is connected to the other end of the first resistor; a first voltage regulator component, one end of which is connected to the other end of the first resistor and the control terminal of the first switch, and the other end of which is grounded; and a first capacitor, the first end of which is connected to the output terminal of the first switch, the second end of which is connected to the positive terminal of the first load, and the third end of which is grounded.

[0042] In this utility model, such as Figure 3 The first voltage regulator module 101311 may also include: The first switch 1013111 has its input terminal connected to the upper bridge transformer 1011 and its output terminal connected to the positive terminal of the first load. It is used to obtain the positive terminal working voltage of the first load. When the positive terminal working voltage is greater than the first preset voltage, it is disconnected; when the positive terminal working voltage is less than the first preset voltage, it is closed, and a target positive terminal voltage is output to the positive terminal of the first load according to the first preset voltage. The target positive terminal voltage is less than the first preset voltage.

[0043] The first voltage regulator component 1013112 has one end connected to the input terminal and control terminal of the first switch respectively, and the other end connected to ground. It is used to output a positive preset voltage to the first switch 1013111 according to the first output voltage.

[0044] In this embodiment of the present invention, when the positive electrode working voltage V_P is lower than the first preset voltage U set by the first voltage regulator component, the first switch 1013111 is turned on, and the voltage output by the upper bridge transformer 1011 passes through the first switch 1013111 and the filter module C1 to V_P, thereby increasing the V_P voltage. When the positive electrode working voltage V_P is higher than the first preset voltage U set by the first voltage regulator component, the switch module is turned off, stopping energy transmission, thereby decreasing the V_P voltage. Therefore, the V_P voltage is approximately equal to the first preset voltage value set by the first voltage regulator component minus the first switch voltage difference U.

[0045] The first filter module C1 has one end connected to the output terminal of the first switch 1013111, and the other end connected to the first load.

[0046] The first resistor R1 has one end connected to the input terminal of the first switch, and the other end connected to the control terminal of the first switch.

[0047] It should be noted that the first voltage regulator component can be a Zener diode, and the model can be selected according to the load requirements of the first load; the first switch can be a transistor or a MOSFET, and the first filter module C1 can be an LC filter.

[0048] This invention uses a first voltage regulator module to specifically monitor and protect the positive working voltage of the first load, which can accurately prevent the first load from malfunctioning, degrading in performance, or even permanently damaged due to excessive positive voltage, effectively ensuring the safe operation of the first load and extending its service life. At the same time, it avoids circuit cascading problems caused by overvoltage of the first load's positive terminal, further enhancing the stability and safety of the entire power supply system and improving the reliability of circuit operation.

[0049] In one embodiment of this utility model, the upper bridge voltage regulator circuit further includes: a second voltage regulator module, which is connected to the first load and is used to output a target negative voltage to the negative terminal of the first load according to the first output voltage.

[0050] In one embodiment of this utility model, the second voltage regulator module may include: a second voltage regulator component, one end of which is connected to the upper bridge transformer; a second resistor, one end of which is connected to the other end of the second voltage regulator component, and the other end of which is grounded; a third resistor, one end of which is connected to one end of the second resistor and the other end of the second voltage regulator component; a second switch, the control terminal of which is connected to the other end of the third resistor, and the input terminal of which is connected to the other end of the second resistor; a fourth resistor, one end of which is connected to one end of the second voltage regulator component, and the other end of which is connected to the output terminal of the second switch; and a second capacitor, the first end of which is connected to one end of the fourth resistor, the second end of which is connected to the negative terminal of the first load, and the third end of which is grounded.

[0051] In this utility model, such as Figure 3 The second voltage regulator module 101312 may further include a second switch 1013121, a second voltage regulator component 1013122, a second resistor R2, a third resistor R3, a fourth resistor R4, and a second filter module C2. One end of the second voltage regulator component 1013122 is connected to the upper bridge transformer 1011, one end of the resistor R4, and one end of the second filter module C2. The other end of the second voltage regulator component 1013122 is connected to one end of the resistors R2 and R3. The other end of the resistor R2 is connected to the first end of the second switch 1013121, the other end of the resistor R3 is connected to the second end of the second switch 1013121, the other end of the resistor R4 is connected to the third end of the second switch 1013121, and the other end of the second filter module is connected to the negative terminal of the first load.

[0052] In this embodiment of the present invention, when the voltage of the negative terminal of the first load is greater than the second preset voltage set by the second voltage regulator component 1013122, the second switch 1013121 is controlled to close; when the voltage of the negative terminal of the first load is greater than the second preset voltage set by the second voltage regulator component 1013122, the second switch 1013121 is controlled to open, and the target negative terminal voltage is output to the negative terminal of the first load according to the first output voltage.

[0053] It should be noted that the values ​​of the second resistor R2, the third resistor R3, and the fourth resistor R4 can be set according to the user's needs, and are not limited here.

[0054] In this invention, the second voltage regulator module provides a stable and compatible target negative voltage to the negative terminal of the first load, ensuring that the positive and negative voltage parameters of the first load are matched. This prevents the first load from malfunctioning, its performance from being affected, or even being damaged due to abnormal negative voltage, further improving the stability and reliability of the first load. At the same time, the positive and negative voltages are independently regulated by their respective modules, enhancing the accuracy and flexibility of the circuit's power supply to the first load. This helps to expand the circuit's adaptability to different types of first loads and ensures the stable operation of the entire power supply system.

[0055] In one embodiment of this utility model, the input terminal of the lower bridge transformer is connected to the second power supply to obtain the voltage of the second power supply and output a second output voltage according to the voltage of the second power supply; the output terminal of the lower bridge voltage regulator circuit is connected to the second load to supply power to the second load according to the second output voltage.

[0056] In this utility model, such as Figure 1 The input terminal of the lower bridge transformer 1021 is connected to the second power supply 1024. The lower bridge transformer 1021 can obtain the required voltage from the second power supply 1024. Based on the obtained voltage from the second power supply, it can transform and process the voltage itself to output a second output voltage that meets the working requirements of the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023.

[0057] The output of the lower bridge voltage regulator circuit 1023 is connected to the second load. It can receive the second output voltage from the lower bridge transformer 1021 and use this second output voltage as a basis to supply power to the second load, ensuring that the second load can obtain stable and suitable power. This utility model ensures the stable operation of the part of the power supply circuit related to the second load by connecting the lower bridge transformer to the second power supply. At the same time, it cooperates with the circuit of the upper bridge to maintain the normal operation of the entire power supply system. The upper and lower bridge drive power supplies adopt a completely independent design, that is, the upper bridge and the lower bridge are powered by their respective transformer secondary windings, which ensures electrical isolation between the upper and lower bridge circuits, avoids the influence of magnetic field coupling on voltage stability, and realizes backup redundant power supply to avoid common cause failure. When the upper bridge is abnormal, the lower bridge can still operate stably, and when the lower bridge is abnormal, the upper bridge can still operate stably.

[0058] In one embodiment of this utility model, the second power source is a low-voltage battery or a high-voltage power battery.

[0059] In this embodiment of the present invention, when the second power source is a low-voltage battery, the input terminal of the lower bridge transformer 1021 is connected to the low-voltage battery, and low-voltage DC power can be obtained from the low-voltage battery. Then, the voltage is boosted according to the voltage to output a second output voltage that is compatible with the lower bridge backup output component 1022 and the lower bridge voltage regulator circuit 1023. The lower bridge voltage regulator circuit 1023 then supplies power to the second load based on this voltage. When the second power source is a high-voltage power battery, the input terminal of the lower bridge transformer 1021 is connected to the high-voltage power battery. After obtaining high-voltage DC power, it is stepped down and converted to output a second output voltage that meets the requirements. Similarly, the lower bridge voltage regulator circuit 1023 supplies power to the second load. This utility model can supply power to the transformer through a high-voltage power battery or a low-voltage battery to ensure that the second load obtains stable and suitable power. When the second power source is a high-voltage power battery, it ensures electrical isolation between the upper and lower bridge circuits and avoids the influence of magnetic field coupling on voltage stability.

[0060] In one embodiment of this utility model, the lower bridge voltage regulator circuit includes multiple circuits, and each lower bridge voltage regulator circuit outputs a different voltage to a different second load.

[0061] In this embodiment of the present invention, the lower bridge voltage regulator circuit 1023 may include multiple circuits. These lower bridge voltage regulator circuits are all connected to the lower bridge transformer 1021 and receive the second output voltage output by it. However, each lower bridge voltage regulator circuit will perform personalized voltage regulation on the second output voltage according to the voltage requirements of the second load it is connected to. Since different second loads require different voltages when they work, some require lower operating voltages and some require relatively higher voltages. Each lower bridge voltage regulator circuit can use the synergistic effect of internal voltage regulators, capacitors, diodes and other components to convert the second output voltage into a specific voltage value that is compatible with the corresponding second load. Then, it outputs different voltages to the different second loads connected to it, ensuring that each second load can obtain a power supply that matches its operating parameters.

[0062] This invention utilizes multiple lower-bridge voltage regulator circuits to output different voltages, precisely meeting the personalized voltage requirements of various secondary loads. This avoids problems such as the secondary load failing to function properly, suffering performance degradation, or even being damaged due to voltage mismatch. Simultaneously, this targeted power supply method reduces unnecessary voltage conversion losses and improves energy utilization efficiency. Furthermore, the independent operation of multiple voltage regulator circuits reduces the impact of a single circuit failure on the power supply of other loads, further enhancing the reliability and adaptability of the entire power supply system. This allows the circuit to flexibly adapt to various types of secondary loads, expanding its application range.

[0063] This utility model discloses a power supply circuit that can form a cross-backup power supply mechanism by setting up an upper bridge backup output component and a lower bridge backup output component, connecting the upper bridge backup output component to the lower bridge voltage regulator circuit, and vice versa. When a transformer malfunctions, the backup power supply component of the other bridge arm can supply power to its voltage regulator circuit in a timely manner, avoiding the problem of power loss in the corresponding voltage regulator circuit due to a single transformer failure, thereby improving the reliability and stability of the entire power supply circuit. It also ensures electrical isolation between the upper and lower bridge circuits, avoids the impact of magnetic field coupling on voltage stability, and realizes redundant backup power supply.

[0064] Reference Figure 4 The diagram shows a structural block diagram of a controller 20 provided in this embodiment of the present invention, which includes a power supply circuit 10 as described above.

[0065] Reference Figure 5 The diagram shows a structural block diagram of a vehicle 30 provided in an embodiment of the present invention, which includes a controller 20 as described above.

[0066] In this utility model, "multiple" refers to two or more.

[0067] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0068] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0069] In this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0070] Unless otherwise specified, all steps of this invention can be performed sequentially or randomly. For example, the method includes steps A and B, indicating that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, the method may also include step C, indicating that step C can be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power supply circuit, characterized by comprising: The power supply circuit includes: The upper bridge drive circuit includes an upper bridge transformer, an upper bridge backup output component, and an upper bridge voltage regulator circuit; the upper bridge transformer is connected to the upper bridge backup output component and the upper bridge voltage regulator circuit respectively, and the upper bridge transformer is used to supply power to the upper bridge backup output component and the upper bridge voltage regulator circuit; The lower bridge drive circuit includes a lower bridge transformer, a lower bridge backup output component, and a lower bridge voltage regulator circuit; the lower bridge transformer is connected to the lower bridge backup output component and the lower bridge voltage regulator circuit respectively; the lower bridge transformer is used to supply power to the lower bridge backup output component and the lower bridge voltage regulator circuit; The upper bridge backup output component is connected to the lower bridge voltage regulator circuit and is used to supply power to the lower bridge voltage regulator circuit when the lower bridge transformer is abnormal. The lower bridge backup output component is connected to the upper bridge voltage regulator circuit and is used to supply power to the upper bridge voltage regulator circuit when the upper bridge transformer is abnormal.

2. The power supply circuit according to claim 1, characterized in that, The input terminal of the upper bridge transformer is connected to the first power supply to obtain the voltage of the first power supply and output a first output voltage according to the voltage of the first power supply. The output terminal of the upper bridge voltage regulator circuit is connected to the first load and is used to supply power to the first load according to the first output voltage.

3. The power supply circuit according to claim 2, characterized in that, The upper bridge voltage regulator circuit includes multiple circuits, and each upper bridge voltage regulator circuit outputs a different voltage to a different first load.

4. The power supply circuit according to claim 3, characterized in that, The upper bridge voltage regulator circuit includes: The first voltage regulator module is connected to the first load and is used to obtain the positive working voltage of the first load, determine whether the positive working voltage is greater than a first preset voltage, and if the positive working voltage is greater than the first preset voltage, stop supplying power to the first load. The second voltage regulator module is connected to the first load and is used to output a target negative voltage to the negative terminal of the first load based on the first output voltage.

5. The power supply circuit according to claim 4, characterized in that, The first voltage regulator module includes: First resistor; The first switch has its input terminal connected to one end of the upper bridge transformer and one end of the first resistor, and its control terminal connected to the other end of the first resistor. A first voltage regulator component, one end of which is connected to the other end of the first resistor and the control terminal of the first switch, and the other end of the first voltage regulator component is connected to ground. The first capacitor has its first terminal connected to the output terminal of the first switch, its second terminal connected to the positive terminal of the first load, and its third terminal connected to ground.

6. The power supply circuit according to claim 4, characterized in that, The second voltage regulator module includes: The second voltage regulator component, one end of which is connected to the upper bridge transformer; The second resistor has one end connected to the other end of the second voltage regulator component, and the other end of the second resistor is connected to ground. The third resistor, one end of which is connected to one end of the second resistor and the other end of the second voltage regulator component; The second switch has its control terminal connected to the other end of the third resistor, and its input terminal connected to the other end of the second resistor. A fourth resistor, one end of which is connected to one end of the second voltage regulator component, and the other end of which is connected to the output terminal of the second switch; The second capacitor has its first terminal connected to one end of the fourth resistor, its second terminal connected to the negative terminal of the first load, and its third terminal connected to ground.

7. The power supply circuit according to claim 1, characterized in that, The input terminal of the lower bridge transformer is connected to the second power supply to obtain the voltage of the second power supply and output a second output voltage according to the voltage of the second power supply. The lower bridge voltage regulator circuit has its output terminal connected to the second load, and is used to supply power to the second load according to the second output voltage.

8. The power supply circuit according to claim 7, characterized in that, The lower bridge voltage regulator circuit includes multiple circuits, and each lower bridge voltage regulator circuit outputs a different voltage to a different second load.

9. A controller, characterized in that, The controller includes a power supply circuit as described in any one of claims 1-8.

10. A vehicle, characterized in that, The vehicle includes the controller as described in claim 9.

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