Brake motor driving circuit, electronic mechanical brake system and vehicle

Abstract

The utility model provides a brake motor driving circuit, an electronic mechanical brake system and a vehicle. The output end of a first power supply is respectively connected with the power supply end of a control chip and the power supply end of a first three-phase driving module; the output end of the second power supply is connected with the power supply end of the control chip and the power supply end of the second three-phase driving module. The output end of the control chip is connected with the control end of the first three-phase driving module and the control end of the second three-phase driving module. The output end of the first three-phase driving module is connected with a first three-phase interface of the brake motor, and the output end of the second three-phase driving module is connected with a second three-phase interface of the brake motor. The brake motor is set to be driven by the two three-phase driving modules respectively, so that the current provided by the single three-phase driving module is small, the current bearing requirement on the wire harness is reduced, the wire diameter of the wire harness can be reduced, the cost is reduced, and the reliability of a connector is ensured.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking, and in particular to a brake motor drive circuit, an electromechanical braking system, and a vehicle. Background Technology

[0002] Currently, the total power requirement of four-wheel EMB (Electro-Mechanical Brake) motors is over 1200W. For single wheels, especially front wheels, the current requirement is relatively large under a 12V automotive power supply system. In order to carry the large current, the wire diameter of the wiring harness between the power supply device and the controller needs to be set to a larger size, which will lead to increased costs and reduced reliability of connectors. Utility Model Content

[0003] The main purpose of this utility model is to propose a brake motor drive circuit, an electromechanical braking system, and a vehicle, aiming to solve the problem of large wire diameter in the wiring harness between the power supply device and the controller of the braking system in the prior art.

[0004] To achieve the above objectives, this utility model provides a brake motor drive circuit, which is connected to a brake motor. The brake motor drive circuit includes a control chip, a power supply, and a three-phase drive module. The power supply includes a first power supply and a second power supply, and the three-phase drive module includes a first three-phase drive module and a second three-phase drive module. Wherein:

[0005] The output terminal of the first power supply is connected to the power supply terminal of the control chip and the power supply terminal of the first three-phase drive module, respectively.

[0006] The output terminal of the second power supply is connected to the power supply terminal of the control chip and the power supply terminal of the second three-phase drive module, respectively.

[0007] The output terminal of the control chip is connected to the control terminal of the first three-phase drive module and the control terminal of the second three-phase drive module, respectively.

[0008] The output terminal of the first three-phase drive module is connected to the first three-phase interface of the brake motor, and the output terminal of the second three-phase drive module is connected to the second three-phase interface of the brake motor.

[0009] Optionally, the three-phase drive module includes a motor drive chip and a voltage conversion unit; wherein:

[0010] The power supply terminal of the motor drive chip and the power supply terminal of the voltage conversion unit are respectively connected to the output terminal of the corresponding power supply.

[0011] The control terminal of the motor drive chip is connected to the output terminal of the control chip, the output terminal of the motor drive chip is connected to the control terminal of the voltage conversion unit, and the output terminal of the voltage conversion unit is connected to the three-phase interface corresponding to the brake motor.

[0012] The output of the voltage conversion unit is also connected to the feedback terminal of the motor drive chip.

[0013] Optionally, the brake motor drive circuit further includes a first diode and a second diode; wherein:

[0014] The output terminal of the first power supply is connected to the power supply terminal of the control chip via the forward direction of the first diode;

[0015] The output terminal of the second power supply is connected to the power supply terminal of the control chip via the forward direction of the second diode.

[0016] Optionally, the brake motor drive circuit further includes a power management chip; wherein:

[0017] The input terminal of the power management chip is connected to the output terminal of the first power supply and the output terminal of the second power supply, respectively, and the output terminal of the power management chip is connected to the power supply terminal of the control chip.

[0018] Optionally, the brake motor drive circuit further includes a motor position detection module; wherein:

[0019] The detection end of the motor position detection module is connected to the brake motor, and the output end of the motor position detection module is connected to the detection end of the control chip.

[0020] Optionally, the brake motor is a six-phase motor or two three-phase motors.

[0021] In addition, to achieve the above objectives, this utility model also provides an electromechanical braking system, which includes a brake motor and a brake motor drive circuit as described above.

[0022] Optionally, the electromechanical braking system is positioned relative to the brake disc; the electromechanical braking system further includes a reduction mechanism, a piston reduction mechanism, a piston, and a brake caliper; wherein:

[0023] The brake disc is disposed between the two brake calipers, and the piston is disposed on the side of one of the brake calipers away from the brake disc, with the piston moving towards the brake disc;

[0024] The piston, the piston reduction mechanism, the reduction mechanism, and the brake motor are connected in sequence.

[0025] In addition, to achieve the above objectives, this utility model also provides a vehicle, which includes a brake disc and an electromechanical braking system as described above.

[0026] This utility model discloses a brake motor drive circuit, an electromechanical braking system, and a vehicle. The brake motor drive circuit is connected to the brake motor. The brake motor drive circuit includes a control chip, a power supply, and a three-phase drive module. The power supply includes a first power supply and a second power supply. The three-phase drive module includes a first three-phase drive module and a second three-phase drive module. The output terminals of the first power supply are connected to the power supply terminals of the control chip and the first three-phase drive module, respectively. The output terminals of the second power supply are connected to the power supply terminals of the control chip and the second three-phase drive module, respectively. The output terminals of the control chip are connected to the control terminals of the first and second three-phase drive modules, respectively. The output terminals of the first three-phase drive module are connected to the first three-phase interface of the brake motor, and the output terminals of the second three-phase drive module are connected to the second three-phase interface of the brake motor. By configuring the brake motor to be driven by two separate three-phase drive modules, and having the two three-phase drive modules powered by two different power supplies, the current required by a single three-phase drive module is reduced, thus lowering the current carrying capacity requirements of the wiring harness. This allows for a reduction in the wire diameter of the wiring harness, thereby reducing costs and ensuring the reliability of the connectors. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a functional block diagram of an embodiment of the brake motor drive circuit of this utility model;

[0029] Figure 2 This is a schematic diagram of the electromechanical braking system of this utility model;

[0030] Figure 3 The brake motor drive circuit of this utility model is applied in... Figure 1 Circuit structure diagram in the embodiment;

[0031] Figure 4 This is a flowchart illustrating the brake motor driving method of this utility model.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0033] Explanation of icon numbers:

[0034]

[0035] Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] This utility model provides a brake motor drive circuit, applied to an electromechanical braking system. Please refer to [link / reference needed]. Figure 1 , Figure 1 This is a functional block diagram of an embodiment of the brake motor drive circuit of this utility model. In this embodiment, the brake motor drive circuit 10 is connected to the brake motor M; the brake motor drive circuit 10 includes a control chip 100, a power supply, and a three-phase drive module. The power supply includes a first power supply 210 and a second power supply 220, and the three-phase drive module includes a first three-phase drive module 310 and a second three-phase drive module 320; wherein:

[0041] The output terminal of the first power supply 210 is connected to the power supply terminal of the control chip 100 and the power supply terminal of the first three-phase drive module 310, respectively.

[0042] The output terminal of the second power supply 220 is connected to the power supply terminal of the control chip 100 and the power supply terminal of the second three-phase drive module 320, respectively.

[0043] The output terminal of the control chip 100 is connected to the control terminal of the first three-phase drive module 310 and the control terminal of the second three-phase drive module 320, respectively.

[0044] The output of the first three-phase drive module 310 is connected to the first three-phase interface of the brake motor M, and the output of the second three-phase drive module 320 is connected to the second three-phase interface of the brake motor M.

[0045] The brake motor drive circuit 10 is used to drive the brake motor M.

[0046] The brake motor M is the motor in the vehicle's EMB system used to output braking torque to achieve the braking function. The specific type of brake motor M can be set according to actual needs, such as a three-phase permanent magnet synchronous motor. For ease of subsequent explanation, the EMB system is described below; see [link to documentation]. Figure 2 The EMB system includes a reduction gear 20, a piston reduction gear 30, a piston 40, and a brake caliper 50; the specific type of the piston reduction gear 30 can be set according to actual needs, such as a ball screw or a planetary roller; among which:

[0047] The brake disc 60 is positioned between two brake calipers 50, and the piston 40 is positioned on the side of one brake caliper 50 away from the brake disc 60, with the piston 40 moving towards the brake disc 60.

[0048] Piston 40, piston reduction mechanism 30, reduction mechanism 20, and brake motor M are connected in sequence.

[0049] When braking is required, the brake motor drive circuit 10 drives the brake motor M to output braking torque. The braking torque is reduced and amplified by the reduction mechanism 20, which drives the piston reduction mechanism 30 to move, converting the rotational motion into linear motion, so as to push the piston 40 to move towards the brake disc 60, thereby pushing the brake caliper 50 to clamp the brake disc 60 to achieve braking.

[0050] The control chip 100 is used to realize the overall control of the brake motor drive circuit 10.

[0051] The three-phase drive module is used to output three-phase electricity to drive the brake motor M.

[0052] The power supply is used to power the control chip 100 and the three-phase drive module.

[0053] It should be noted that in this embodiment, the first three-phase drive module 310 and the second three-phase drive module 320 drive the brake motor M simultaneously. If the brake motor M requires 100% braking during braking, the first three-phase drive module 310 and the second three-phase drive module 320 will drive the brake motor M to achieve 50% braking, so as to jointly achieve 100% braking.

[0054] Since the first three-phase drive module 310 and the second three-phase drive module 320 drive the brake motor M simultaneously, the braking current can be provided jointly by the first three-phase drive module 310 and the second three-phase drive module 320. Therefore, the current that each of the first three-phase drive module 310 and the second three-phase drive module 320 needs to carry will be reduced. If the brake motor M has a 100% current requirement, the first three-phase drive module 310 and the second three-phase drive module 320 can each provide 50%. Since the current requirement of a single three-phase drive module is reduced, smaller wire diameter wire harnesses can be used for circuit connections. Specifically, smaller wire diameter wire harnesses can be used for connections between the power supply and the three-phase drive module, and between the three-phase drive module and the brake motor M.

[0055] The reduction in wire diameter reduces wire harness cost and weight, while also lowering the requirements for connector design and reducing the impact of vibration.

[0056] It is understood that in this embodiment, the brake motor M is driven by two paths simultaneously. When both paths are driving normally, the brake motor M can meet 100% of the braking requirements. However, when one path, such as the first power supply 210 or the first three-phase drive module 310, fails, that path cannot drive the brake motor M. But the other path can still drive normally. Therefore, at least 50% of the braking requirements can be guaranteed, realizing semi-redundancy in the drive of the brake motor M and ensuring the reliability of the brake motor M's operation.

[0057] In this embodiment, the brake motor M is configured to be driven by two separate three-phase drive modules. The two three-phase drive modules are powered by two different power supplies, which reduces the current required by a single three-phase drive module, thereby reducing the current carrying capacity requirement of the wiring harness. As a result, the wire diameter of the wiring harness can be reduced, thus lowering the cost and ensuring the reliability of the connector.

[0058] Further details will follow. Figure 3 The three-phase drive module includes a motor drive chip 311 and a voltage conversion unit; wherein:

[0059] The power supply terminal of the motor drive chip 311 and the power supply terminal of the voltage conversion unit are respectively connected to the output terminal of the corresponding power supply.

[0060] The control terminal of the motor drive chip 311 is connected to the output terminal of the control chip 100, the output terminal of the motor drive chip 311 is connected to the control terminal of the voltage conversion unit, and the output terminal of the voltage conversion unit is connected to the three-phase interface corresponding to the brake motor M.

[0061] The output of the voltage conversion unit is also connected to the feedback terminal of the motor drive chip 311.

[0062] The power supply provides power to the motor drive chip 311 and the voltage conversion unit respectively;

[0063] The motor drive chip 311 is controlled by the control chip 100 to drive the voltage conversion unit to control the brake motor M. The control chip 100 sends a corresponding control signal to the motor drive chip 311 based on the braking requirements. The motor drive chip 311 generates a drive signal for the switching devices in the voltage conversion unit based on the control signal and sends it to the corresponding switching devices. The voltage conversion unit outputs three-phase power to the three-phase interface of the brake motor M based on the drive signal sent by the motor drive chip 311, driving the brake motor M to operate.

[0064] The specific type and model of the motor driver chip 311 can be set based on actual needs.

[0065] The voltage conversion unit is a three-phase bridge 321 for motors. The specific structure of the three-phase bridge 321 can be set according to actual needs. The motor drive chip 311 drives the motor by controlling the control devices, such as MOSFETs, within the three-phase bridge 321.

[0066] Understandably, the motor drive chip 311 can detect the output of the three-phase bridge 321 to determine whether the electrical signal output by the three-phase bridge 321 meets the driving requirements of the brake motor M, and adjust the control of the three-phase bridge 321 based on the actual output. In addition, the motor drive chip 311 can also determine whether the three-phase bridge 321 has malfunctioned based on the actual output. When the motor drive chip 311 detects a malfunction in the three-phase bridge 321, in order to prevent the malfunctioning three-phase bridge 321 from affecting the normal operation of the brake motor M, it can control the three-phase bridge 321 to stop working and send a fault signal to the control chip 100 so that the control chip 100 can perform a warning operation, such as reminding the driver that there is a brake system malfunction, to stop and check in time, and to drive carefully.

[0067] Furthermore, the brake motor drive circuit 10 also includes a first diode D1 and a second diode D2; wherein:

[0068] The output terminal of the first power supply 210 is connected to the power supply terminal of the control chip 100 through the forward direction of the first diode D1;

[0069] The output terminal of the second power supply 220 is connected to the power supply terminal of the control chip 100 through the forward direction of the second diode D2.

[0070] The control chip 100 is powered by both the first power supply 210 and the second power supply 220. Since there are two drives in this application, each drive is powered by a power supply. In actual applications, the power supply itself may fail. In order to avoid the problem of the control chip 100 losing power due to the failure of one power supply, in this embodiment, the control chip 100 is powered by both the first power supply 210 and the second power supply 220. When one power supply fails, the other power supply can still ensure the power supply of the control chip 100.

[0071] Meanwhile, the power supply and the power supply terminal of the control chip 100 are connected through a diode. When the power supply is supplying power normally, the voltage output by the power supply is output to the power supply terminal of the control chip 100 through the diode. When the power supply is de-energized, the voltage output stops. At the same time, due to the presence of the diode, the voltage of the other power supply will not be reversed to the faulty power supply, thus ensuring the power supply of the control chip 100.

[0072] Furthermore, the brake motor drive circuit 10 also includes a power management chip 400; wherein:

[0073] The input terminal of the power management chip 400 is connected to the output terminal of the first power supply 210 and the output terminal of the second power supply 220, respectively, and the output terminal of the power management chip 400 is connected to the power supply terminal of the control chip 100.

[0074] The power management chip 400 is used to control the output of the connected power supply. For example, the power management chip 400 can specifically control the supply voltage of the control chip 100. When both power supplies are supplying power normally, the power management chip 400 can select one or combine the two power supplies to output voltage to the control chip 100. When one of the power supplies fails, the power management chip 400 can output voltage to the control chip 100 based on the other normal power supply.

[0075] The specific type and model of the power management chip 400 can be set based on actual needs.

[0076] Furthermore, the brake motor drive circuit 10 also includes a motor position detection module 500; wherein:

[0077] The detection end of the motor position detection module 500 is connected to the brake motor M, and the output end of the motor position detection module 500 is connected to the detection end of the control chip 100.

[0078] The motor position detection module 500 is used to detect the operating position of the brake motor M, such as the angle of the rotor; the motor position detection module 500 can be set according to actual needs, such as a motor position sensor.

[0079] Understandably, for an electromechanical braking system, during braking, the brake caliper 50 needs to be pushed to a certain position to lock the brake disc 60. Correspondingly, the brake motor M needs to perform a corresponding action; that is, if braking is to be completed, the brake motor M needs to move to the corresponding position, i.e., the target motor position. Therefore, in this embodiment, a motor position detection module 500 is set to detect the position of the brake motor M and send the motor position to the control chip 100. After the braking action, if the control chip 100 detects that the real-time motor position of the brake motor M is the same as the target motor position, it is considered that the action of the brake motor M meets the braking requirements and the drive is normal. If the control chip 100 detects that the real-time motor position of the brake motor M is different from the target motor position, it is considered that the action of the brake motor M does not meet the braking requirements, and there may be a fault in the power supply and the motor drive chip 311. At this time, the control chip 100 can perform a warning operation, such as reminding the driver that there is a brake system fault, to stop and check in time, and to drive carefully.

[0080] In another embodiment, the brake motor drive circuit 10 further includes a motor current detection module. The detection terminal of the motor current detection module is connected to the brake motor M, and the output terminal of the motor current detection module is connected to the detection terminal of the control chip 100.

[0081] The motor current detection module is used to detect the real-time current value of the brake motor M. The motor current detection module can be configured according to actual needs, such as using a current sensor.

[0082] The system operation information includes the real-time motor current value of the brake motor. Determining whether a fault has occurred based on this information includes: determining the target motor current value corresponding to the rated braking performance; acquiring the real-time motor current value sent by the motor current detection module; and determining whether a drive fault has occurred based on the target motor current value and the real-time motor current value. In another embodiment, the brake motor drive circuit 10 also includes a motor pressure detection module. The detection terminal of the motor pressure detection module is connected to the brake motor M, and the output terminal of the motor pressure detection module is connected to the detection terminal of the control chip 100.

[0083] The motor pressure detection module is used to detect the real-time pressure value of the brake motor M. The motor pressure detection module can be configured according to actual needs, such as a pressure sensor.

[0084] The system operation information includes the real-time motor pressure value of the brake motor. Determining whether a fault has occurred based on the system operation information includes: determining the target motor pressure value corresponding to the rated braking performance, obtaining the real-time motor pressure value sent by the motor pressure detection module, and determining whether a drive fault has occurred based on the target motor pressure value and the real-time motor pressure value.

[0085] Understandably, the real-time motor current and pressure values ​​of the brake motor M can be detected through the motor current detection module and the motor pressure monitoring module to monitor the operating status of the brake motor. When any of the motor position, motor current, or motor pressure values ​​deviates from the target value, the control chip 100 considers that the action of the brake motor M does not meet the braking requirements, and that there may be a fault in the power supply or the motor drive chip 311. At this time, the control chip 100 can execute a warning operation, such as reminding the driver that there is a brake system fault, to stop and check in time, and to drive carefully.

[0086] Furthermore, the brake motor M is a six-phase motor or two three-phase motors.

[0087] The brake motor M includes two sets of three-phase interfaces. Each set of three-phase interfaces includes U, V, and W interfaces. Therefore, the U, V, and W interfaces in one set of three-phase interfaces are connected to the U, V, and W outputs of a three-phase drive module.

[0088] This utility model also protects a brake motor driving method, which is applied to the above-mentioned brake motor driving circuit. The brake motor driving method includes:

[0089] The first three-phase drive module is controlled at half of its rated braking performance so that the first three-phase drive module drives the brake motor to output half of its rated braking torque.

[0090] The second and third phase drive modules are controlled at half of their rated braking performance so that the second and third phase drive modules drive the brake motor to output half of the rated braking torque.

[0091] The brake motor driving method in this embodiment can be executed by a control chip.

[0092] In this embodiment, the first three-phase drive module and the second three-phase drive module drive the brake motor simultaneously. If the brake motor requires 100% braking power during braking, the first three-phase drive module and the second three-phase drive module each drive the brake motor to achieve 50% braking power, so as to jointly achieve 100% braking power.

[0093] Since the first and second three-phase drive modules drive the brake motor simultaneously, the braking current can be provided jointly by both modules. Therefore, the current each module needs to carry is reduced. For example, if the brake motor has a 100% current requirement, the first and second three-phase drive modules can each provide 50%. Because the current requirement of a single three-phase drive module is reduced, smaller wire diameters can be used for wiring connections. Specifically, smaller wire diameters can be used for the wiring harnesses connecting the power supply and the three-phase drive modules, as well as between the three-phase drive modules and the brake motor.

[0094] The reduction in wire diameter reduces wire harness cost and weight, while also lowering the requirements for connector design and reducing the impact of vibration.

[0095] It is understood that in this embodiment, the brake motor is driven by two paths simultaneously. When both paths are driving normally, the brake motor can meet 100% of the braking requirements. However, if one path, such as the first power supply or the first three-phase drive module, fails, that path cannot drive the brake motor. But the other path can still drive normally. Therefore, at least 50% of the braking requirements can be guaranteed, realizing semi-redundancy of the brake motor drive and ensuring the reliability of the brake motor operation.

[0096] By configuring the brake motor to be driven by two separate three-phase drive modules, and having the two three-phase drive modules powered by two different power supplies, the current required by a single three-phase drive module is reduced, thus lowering the current carrying capacity requirements of the wiring harness. This allows for a reduction in the wire diameter of the wiring harness, thereby reducing costs and ensuring the reliability of the connectors.

[0097] Furthermore, the brake motor driving method also includes:

[0098] Obtain system operation information and determine whether a driver failure has occurred based on the system operation information;

[0099] If a driver failure occurs, a fault alert will be issued.

[0100] The system operation information indicates the operating status of the electromechanical braking system. When a drive fault occurs in the electromechanical braking system, a fault alert is executed. Drive faults refer to faults that occur during the braking motor's drive process, such as power supply failure, motor driver chip failure, or motor three-phase bridge failure.

[0101] The fault alert function can be set according to actual needs, such as reminding the driver that there is a brake system malfunction, so that they can stop and check it in time and drive carefully.

[0102] Furthermore, the system operation information includes the real-time motor position of the brake motor. Determining whether a drive fault has occurred based on this system operation information includes:

[0103] Determine the target motor location corresponding to the rated braking performance;

[0104] Obtain the real-time motor position sent by the motor position detection module;

[0105] Determine whether a drive failure has occurred based on the target motor position and the real-time motor position.

[0106] Understandably, for electromechanical braking systems, during braking, the brake caliper needs to be pushed to a certain position to engage the brake disc. Correspondingly, the brake motor needs to perform a corresponding action; that is, to complete braking, the brake motor needs to move to the corresponding position, i.e., the target motor position. Therefore, in this embodiment, a motor position detection module is set to detect the position of the brake motor and send the motor position information to the control chip. After braking, if the control chip detects that the real-time motor position of the brake motor is the same as the target motor position, it is considered that the action of the brake motor meets the braking requirements and the drive is normal. If the control chip detects that the real-time motor position of the brake motor is different from the target motor position, it is considered that the action of the brake motor does not meet the braking requirements, and there may be a fault in the power supply and the motor drive chip. At this time, the control chip can perform a warning operation, such as reminding the driver that there is a brake system fault, to stop and check in time, and to drive carefully.

[0107] Furthermore, the system operation information includes the motor's three-phase bridge operation information. Determining whether a drive fault has occurred based on this system operation information includes:

[0108] The motor driver chip sends three-phase bridge operating information, which is determined by the motor driver chip based on the feedback voltage of the three-phase bridge.

[0109] Determine whether a drive fault has occurred based on the operating information of the three-phase bridge motor.

[0110] The motor drive chip can detect the output of the three-phase bridge of the motor to obtain its operating information, thereby determining whether the output electrical signal meets the drive requirements of the brake motor. Based on the actual output, the chip adjusts the control of the three-phase bridge. Furthermore, the motor drive chip can also determine if the three-phase bridge is faulty based on the actual output. When the motor drive chip detects a fault in the three-phase bridge, to prevent the faulty bridge from affecting the normal operation of the brake motor, it can stop the bridge and send a fault signal to the control chip. This prompts the control chip to perform a warning operation, such as reminding the driver of a brake system malfunction, urging them to stop and inspect the vehicle, and to drive carefully.

[0111] This utility model also protects an electromechanical braking system, which includes a brake motor and a brake motor drive circuit. The structure of the brake motor drive circuit can be referred to the above embodiment, and will not be repeated here. Accordingly, since the electromechanical braking system of this embodiment adopts the above-described brake motor drive circuit technical solution, it possesses all the beneficial effects of the above-described brake motor drive circuit.

[0112] Furthermore, the electromechanical braking system is positioned relative to the brake disc; the electromechanical braking system also includes a reduction mechanism, a piston reduction mechanism, a piston, and a brake caliper; wherein:

[0113] The brake disc is positioned between two brake calipers, and the piston is positioned on the side of one brake caliper away from the brake disc, with the piston moving towards the brake disc.

[0114] The piston, piston reduction mechanism, reduction mechanism, and brake motor are connected in sequence.

[0115] This utility model also protects a vehicle including a brake disc and an electromechanical braking system. The structure of the electromechanical braking system can be referred to in the above embodiments, and will not be repeated here. Therefore, since the vehicle of this embodiment adopts the above-described electromechanical braking system technical solution, the vehicle has all the beneficial effects of the above-described electromechanical braking system.

[0116] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0117] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A brake motor drive circuit, characterized in that, The brake motor drive circuit is connected to the brake motor; the brake motor drive circuit includes a control chip, a power supply, and a three-phase drive module, the power supply includes a first power supply and a second power supply, and the three-phase drive module includes a first three-phase drive module and a second three-phase drive module; wherein: The output terminal of the first power supply is connected to the power supply terminal of the control chip and the power supply terminal of the first three-phase drive module, respectively. The output terminal of the second power supply is connected to the power supply terminal of the control chip and the power supply terminal of the second three-phase drive module, respectively. The output terminal of the control chip is connected to the control terminal of the first three-phase drive module and the control terminal of the second three-phase drive module, respectively. The output terminal of the first three-phase drive module is connected to the first three-phase interface of the brake motor, and the output terminal of the second three-phase drive module is connected to the second three-phase interface of the brake motor.

2. The brake motor drive circuit as described in claim 1, characterized in that, The three-phase drive module includes a motor drive chip and a voltage conversion unit; wherein: The power supply terminal of the motor drive chip and the power supply terminal of the voltage conversion unit are respectively connected to the output terminal of the corresponding power supply. The control terminal of the motor drive chip is connected to the output terminal of the control chip, the output terminal of the motor drive chip is connected to the control terminal of the voltage conversion unit, and the output terminal of the voltage conversion unit is connected to the three-phase interface corresponding to the brake motor. The output of the voltage conversion unit is also connected to the feedback terminal of the motor drive chip.

3. The brake motor drive circuit as described in claim 1, characterized in that, The brake motor drive circuit further includes a first diode and a second diode; wherein: The output terminal of the first power supply is connected to the power supply terminal of the control chip via the forward direction of the first diode; The output terminal of the second power supply is connected to the power supply terminal of the control chip via the forward direction of the second diode.

4. The brake motor drive circuit as described in claim 1, characterized in that, The brake motor drive circuit also includes a power management chip; wherein: The input terminal of the power management chip is connected to the output terminal of the first power supply and the output terminal of the second power supply, respectively, and the output terminal of the power management chip is connected to the power supply terminal of the control chip.

5. The brake motor drive circuit as described in claim 1, characterized in that, The brake motor drive circuit further includes a motor position detection module; wherein: The detection end of the motor position detection module is connected to the brake motor, and the output end of the motor position detection module is connected to the detection end of the control chip.

6. The brake motor drive circuit as described in claim 1, characterized in that, The brake motor drive circuit further includes a motor current detection module; wherein: The detection terminal of the motor current detection module is connected to the brake motor, and the output terminal of the motor current detection module is connected to the detection terminal of the control chip.

7. The brake motor drive circuit as described in claim 1, characterized in that, The brake motor is a six-phase motor or two three-phase motors.

8. An electromechanical braking system, characterized in that, The electromechanical braking system includes a brake motor and a brake motor drive circuit as described in any one of claims 1 to 7.

9. The electromechanical braking system as described in claim 8, characterized in that, The electromechanical braking system is positioned relative to the brake disc; the electromechanical braking system further includes a reduction mechanism, a piston reduction mechanism, a piston, and a brake caliper; wherein: The brake disc is disposed between the two brake calipers, and the piston is disposed on the side of one of the brake calipers away from the brake disc, with the piston moving towards the brake disc; The piston, the piston reduction mechanism, the reduction mechanism, and the brake motor are connected in sequence.

10. A vehicle, characterized in that, The vehicle includes brake discs and an electromechanical braking system as described in claim 8 or 9.

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