Control device and method for direct current motor of automobile tailboard

Abstract

The invention provides a control device and method for an automobile tailboard direct current motor, and relates to the technical field of motor control, the control device comprises a control module, a power supply, a motor, an MOS tube, a power switch and a voltage stabilization module, the power supply is used for providing stable working voltage for the control module through the voltage stabilization module; the positive electrode of the power supply is further electrically connected with the drain electrode of the MOS tube through the power switch, the grid electrode of the MOS tube is electrically connected with the control module, the source electrode of the MOS tube is electrically connected with the positive electrode of the motor, and the negative electrode of the motor is electrically connected with the negative electrode of the power supply; the power supply is also used for supplying power to the motor, and the control module is used for receiving a target control signal and performing on-off control on the MOS tube based on the target control signal so as to perform soft start and speed regulation control on the motor. According to the technical scheme, the purposes of soft start and speed regulation control of the motor are achieved, and the operation safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor control, and in particular to a control device and method for a DC motor on a car tailgate. Background Art

[0002] At present, car tailgates are widely used in the process of loading and unloading goods in trucks. Due to their convenience and practicality, they greatly improve the loading and unloading efficiency. However, car tailgates are usually driven by low-voltage DC motors. When the tailgate is started under a heavy load, the starting current of the motor will soar to 3 to 5 times the normal operating current. This instantaneous high current may trigger the overload protection function, causing the equipment to lose control, thereby posing a safety hazard. In addition, traditional car tailgates do not have a speed regulation function and cannot adjust the speed when the tailgate is folded. This may endanger personnel safety due to excessive speed in unexpected situations. It can be seen that the control method of the DC motor of the car tailgate in the related technology is unsafe. Summary of the invention

[0003] The purpose of the present application is to overcome the above-mentioned technical problems. The present application provides a control device and method for a DC motor on a car tailgate.

[0004] In the first aspect, the present application provides a control device for a car tailgate DC motor, comprising: a control module, a power supply, a motor, a MOS tube, a power switch, and a voltage stabilizing module, wherein the power supply is electrically connected to the voltage stabilizing module through the power switch, the output end of the voltage stabilizing module is electrically connected to the control module, and the power supply is used to provide a stable working voltage for the control module through the voltage stabilizing module; the positive electrode of the power supply is also electrically connected to the drain of the MOS tube through the power switch, the gate of the MOS tube is electrically connected to the control module, the source of the MOS tube is electrically connected to the positive electrode of the motor, and the negative electrode of the motor is electrically connected to the negative electrode of the power supply; the power supply is also used to power the motor, and the control module is used to receive a target control signal and perform switch control on the MOS tube based on the target control signal, thereby soft-starting and speed controlling the motor.

[0005] By adopting the above technical solution, the target control signal is received through the control module, and the MOS tube is switched on and off based on the signal, which effectively reduces the current impact at startup and improves the safety of the system; the control module is not only responsible for the startup control of the motor, but also has a speed regulation function, so that the movement speed of the tailboard can be adjusted according to actual needs, which not only improves the loading and unloading efficiency, but also ensures the safety of the operator. The control device of the automobile tailboard DC motor receives the target control signal through the control module, and switches the MOS tube based on the target control signal to achieve soft start and speed regulation control of the motor. The soft start function avoids the generation of peak current at startup, and the speed regulation function can adjust the motor speed according to different situations to ensure the safe operation of the equipment. The control device of the automobile tailboard DC motor can effectively control the starting current, avoid triggering the overload protection function due to instantaneous large current, ensure the normal operation of the equipment, and can adjust the motor speed in real time according to the control signal, improve the operational safety, and prevent the safety hazards caused by the rapid folding of the tailboard.

[0006] Optionally, the above-mentioned device also includes a freewheeling module, wherein the freewheeling module is connected between the positive pole of the motor and the negative pole of the motor, and the freewheeling module is used to provide a freewheeling path for the motor when the power is off.

[0007] By adopting the above technical solution, the freewheeling module is connected between the positive pole of the motor and the negative pole of the motor, providing a freewheeling path for the motor when the power is off, avoiding the damage to the electrical components caused by the reverse electromotive force generated by the motor at the moment of power failure, and improving the stability and reliability of the system. The freewheeling module provides a freewheeling path for the motor when the motor is powered off, effectively avoiding the damage to the motor and the control module caused by the reverse electromotive force generated at the moment of power failure, and improving the stability and reliability of the system.

[0008] Optionally, the freewheeling module includes at least one diode, wherein the anode of the diode is electrically connected to the cathode of the motor, and the cathode of the diode is electrically connected to the anode of the motor, and the diode is used to provide a freewheeling path for the motor when power is off.

[0009] By adopting the above technical solution, the freewheeling module includes at least one diode, the positive pole of the diode is electrically connected to the negative pole of the motor, and the negative pole of the diode is electrically connected to the positive pole of the motor. The diode provides a freewheeling path for the motor when the power is off, effectively avoiding the impact of the reverse electromotive force at the moment of power off on the motor and the control module, thereby improving the stability and reliability of the system.

[0010] Optionally, the above-mentioned device also includes a temperature control module, wherein the temperature control module is connected to the motor and the control module respectively, the temperature control module is used to collect the target temperature value and transmit the target temperature value to the control module, and the control module is also used to control the motor to stop running when it is determined that the target temperature value is greater than or equal to a preset temperature threshold, wherein the target temperature value includes a first temperature value of the motor and / or a second temperature value of the circuit board of the control module.

[0011] By adopting the above technical solution, a temperature control module is added to the device, and the temperature control module is connected to the motor and the control module to collect the target temperature value and transmit the target temperature value to the control module. When the target temperature value is greater than or equal to the preset temperature threshold, the control module controls the motor to stop running, thereby realizing the temperature protection function. By introducing the temperature control module, real-time monitoring and overheating protection of the temperature of the motor and its control module are realized, which solves the safety problems that may be caused by overheating of the motor and the control module, and achieves the technical effects of enhancing safety, protecting equipment, improving reliability and optimizing user experience.

[0012] Optionally, the control module is further configured to control the power switch to turn on so as to cut off the power supply when it is determined that the target temperature value is greater than or equal to a preset temperature threshold.

[0013] By adopting the above technical solution, when the target temperature value detected by the temperature control module exceeds the preset temperature threshold, the control module not only controls the motor to stop running, but also further controls the power switch to turn on and cut off the power supply, thereby fundamentally eliminating the safety hazards caused by overheating.

[0014] Optionally, the above-mentioned device also includes a target remote control module, wherein the target control signal is sent from the target remote control module to the control module, the target remote control module is communicatively connected with the control module, and the target remote control module includes at least one of the following: a wired remote control module; a wireless remote control module.

[0015] By adopting the above technical solution, the target remote control module is connected to the control module in communication, and can send a target control signal to the control module. The target remote control module includes a wired remote control module and a wireless remote control module. Thus, the user can remotely control the start and speed regulation of the motor through the target remote control module, which improves the convenience and flexibility of operation.

[0016] Optionally, when the target control signal is a first control signal, the control module is used to send a first drive signal to the MOS tube to soft-start the motor, wherein the first control signal is used to indicate a start operation on the tailgate of the automobile, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step size, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration.

[0017] By adopting the above technical solution, when the target control signal is the first control signal, the control module sends the first drive signal to the MOS tube, and the motor is soft-started by gradually increasing the duty cycle of the first PWM signal, which effectively avoids the generation of peak current at the moment of startup, thereby preventing the overload protection function from being triggered, ensuring that the equipment can work normally and improving safety. After the first PWM signal of the preset duration, it switches to the second PWM signal to maintain the stable operation of the motor. The duty cycle of the first PWM signal gradually increases according to the preset step length, so that the increase of current during the motor startup process is more stable, effectively avoiding the current shock at startup; the second PWM signal is a PWM signal with a preset duty cycle value, which can ensure that the motor can smoothly transition to a normal operating state after startup.

[0018] Optionally, when the target control signal is a second control signal, the control module is used to send a second drive signal to the MOS tube to control the speed of the motor, wherein the second control signal is used to instruct the retracting operation of the tailgate of the automobile, and the second drive signal includes N segments of PWM signals, each segment of the N segments of PWM signals corresponds to a different time period during the retracting operation of the tailgate of the automobile, and the duty cycle of each segment of the N segments of PWM signals is different, and N is a positive integer greater than or equal to 2.

[0019] By adopting the above technical solution, when the target control signal is the second control signal, the control module sends a second drive signal to the MOS tube to control the speed of the motor. The second drive signal includes N segments of PWM signals, each of which corresponds to a different time period during the retracting operation of the tailgate of the automobile. The duty cycle of each PWM signal is different, which realizes the speed control of the tailgate during the retracting process, so that the tailgate can run in sections at different speeds when retracting, thereby improving safety. The control module sends the second drive signal to the MOS tube to achieve precise speed control of the motor, so that the tailgate can adjust the operating speed according to the needs of different time periods during the retracting operation, thereby improving the safety and efficiency of the operation.

[0020] In the second aspect of the present application, a control method for a car tailgate DC motor is also provided, which is applied to the control device of the car tailgate DC motor of any of the aforementioned items, including: a control module receives a target control signal; the control module controls the switch of the MOS tube based on the target control signal, thereby soft-starting and speed controlling the motor.

[0021] By adopting the above technical solution, when the control module receives the target control signal, it can control the switch of the MOS tube, thereby soft-starting the motor, avoiding overload protection problems and equipment damage caused by peak current at startup, and ensuring safe and stable operation of the equipment. At the same time, according to different target control signals, the control module can send corresponding drive signals to achieve speed control of the motor when the tailgate is folded, improve operational safety, prevent dangerous situations caused by excessive speed, and ensure personnel safety. The soft start function avoids the generation of peak current at startup, and the speed regulation function can adjust the motor speed according to different situations to ensure the safe operation of the equipment. The control device of the DC motor of the automobile tailgate can effectively control the starting current, avoid the overload protection function triggered by instantaneous large current, ensure the normal operation of the equipment, and can adjust the motor speed in real time according to the control signal, improve operational safety, and prevent safety hazards caused by the rapid folding of the tailgate.

[0022] Optionally, the control module performs switch control on the MOS tube based on the target control signal, thereby soft-starting and speed-regulating the motor, including: when the target control signal is a first control signal, the control module is used to send a first drive signal to the MOS tube to soft-start the motor, wherein the first control signal is used to indicate that a start operation is performed on the tailgate of the automobile, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step length, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration; when the target control signal is a second control signal, the control module is used to send a second drive signal to the MOS tube to perform speed-regulating control on the motor, wherein the second control signal is used to indicate that a retracting operation is performed on the tailgate of the automobile, and the second drive signal includes N-segment PWM signals, each segment of the N-segment PWM signals corresponds to a different time period during the retracting operation of the tailgate of the automobile, and each segment of the N-segment PWM signals has a different duty cycle, and N is a positive integer greater than or equal to 2.

[0023] By adopting the above technical solution, when the target control signal is the first control signal, the control module sends the first drive signal to the MOS tube, and the motor soft start is realized by the gradually increasing duty cycle of the first PWM signal, which effectively avoids the generation of peak current at the moment of starting, thereby preventing the overload protection function from being triggered, ensuring that the equipment can work normally, and improving safety. After the first PWM signal of the preset duration, it is switched to the second PWM signal to maintain the stable operation of the motor. The duty cycle of the first PWM signal is gradually increased according to the preset step length, so that the increase of current during the motor starting process is more stable, effectively avoiding the current shock during starting; the second PWM signal is a PWM signal with a preset duty cycle value, which can ensure that the motor can smoothly transition to a normal operating state after starting. When the target control signal is the second control signal, the control module sends the second drive signal to the MOS tube to control the speed of the motor. The second drive signal includes N segments of PWM signals, each segment of PWM signals corresponds to a different period of time during the retracting operation of the automobile tailgate, and the duty cycle of each segment of PWM signals is different, which realizes the speed control of the tailgate during the retracting process, so that the tailgate can run in sections at different speeds when retracting, improving safety. The control module sends a second drive signal to the MOS tube to achieve precise speed control of the motor, so that the tailgate can adjust its operating speed according to the needs of different time periods during the folding operation, thereby improving the safety and efficiency of the operation.

[0024] In a third aspect of the present application, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the program, any of the above method steps is implemented.

[0025] In a fourth aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores instructions, and when the instructions are executed, any of the above method steps is performed.

[0026] In summary, one or more technical solutions provided in this application have at least the following technical effects or advantages: 1. It can effectively control the starting current and control the switch of the MOS tube based on the target control signal to achieve soft start and speed control of the motor, avoiding the overload protection function triggered by instantaneous large current. It also has the speed regulation function, so that the movement speed of the tail board can be adjusted according to actual needs, which not only improves the loading and unloading efficiency, but also ensures the safety of the operator; 2. The freewheeling module provides a freewheeling path for the motor when the motor is powered off, effectively avoiding the damage to the motor and control device caused by the reverse electromotive force generated at the moment of power failure, and improving the stability and reliability of the system; 3. By introducing the temperature control module, real-time monitoring and overheating protection of the motor and its control module are realized, which solves the safety problems that may be caused by overheating of the motor and control module, and achieves the technical effects of enhancing safety, protecting equipment, improving reliability and optimizing user experience; 4. Realize precise speed control of the motor, so that the tailgate can adjust the running speed according to the needs of different time periods during the folding operation, improving the safety and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural block diagram of a control device for a DC motor of a car tailgate provided in an embodiment of the present application; Figure 2 This is a flow chart of a control method for a DC motor on a car tailgate provided in an embodiment of the present application; Figure 3 This is a principle block diagram of a soft-start positive pole control module for a DC motor on a car tailgate provided in an embodiment of the present application; Figure 4 It is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application.

[0028] Description of reference numerals: Electronic device-400, processor-401, communication bus-402, user interface-403, network interface-404, memory-405. DETAILED DESCRIPTION

[0029] In order to enable technicians in this field to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0030] In the description of the embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "for example" or "for example" is intended to present related concepts in a specific way.

[0031] In the description of the embodiments of the present application, the term "plurality" means two or more. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0032] The following is combined with Figure 1-4 The embodiments of the present application are described in detail.

[0033] The present application provides a control device for a DC motor on a car tailgate, referring to Figure 1 , Figure 1 This is a structural block diagram of a control device for a DC motor of a car tailgate provided in an embodiment of the present application. The device includes: a control module, a power supply, a motor, a MOS tube, a power switch, and a voltage stabilizing module, wherein: The power supply is electrically connected to the voltage stabilizing module through the power switch, the output end of the voltage stabilizing module is electrically connected to the control module, and the power supply is used to provide a stable working voltage for the control module through the voltage stabilizing module; The positive electrode of the power supply is also electrically connected to the drain electrode of the MOS tube through the power switch, the gate electrode of the MOS tube is electrically connected to the control module, the source electrode of the MOS tube is electrically connected to the positive electrode of the motor, and the negative electrode of the motor is electrically connected to the negative electrode of the power supply; The power supply is also used to supply power to the motor. The control module is used to receive a target control signal and perform switch control on the MOS tube based on the target control signal, thereby performing soft start and speed control on the motor.

[0034] In the above embodiment, the target control signal is received by the control module, and the MOS tube is switched on and off based on the signal, which effectively reduces the current impact at startup and improves the safety of the system; the control module is not only responsible for the startup control of the motor, but also has a speed regulation function, so that the movement speed of the tail board can be adjusted according to actual needs, which not only improves the loading and unloading efficiency, but also ensures the safety of the operator. The control device of the automobile tail board DC motor receives the target control signal through the control module, and switches the MOS tube based on the target control signal to achieve soft start and speed regulation control of the motor. The soft start function avoids the generation of peak current at startup, and the speed regulation function can adjust the motor speed according to different situations to ensure the safe operation of the equipment. The control device of the automobile tail board DC motor can effectively control the starting current, avoid triggering the overload protection function due to instantaneous large current, ensure the normal operation of the equipment, and can adjust the motor speed in real time according to the control signal, improve the operational safety, and prevent the safety hazards caused by the rapid folding of the tail board. The above motor is a DC motor. This embodiment reduces the current peak value when the motor starts through the soft start technology, avoids the overload protection from being triggered by mistake, reduces the risk of equipment out of control, and improves the safety of the entire system; adds the speed regulation function of the motor, and by adjusting the switch control signal of the MOS tube, the motor speed can be accurately adjusted, so that the movement speed of the tailgate can be flexibly controlled in different scenarios to ensure the safety and flexibility of operation. For example, the MOS tube can be controlled by PWM technology, so that the current in the motor startup process gradually increases instead of a sudden surge, reducing the impact on the battery and other electrical components; in addition, by controlling the MOS tube with PWM, the speed of the motor can be adjusted as needed, so that the tailgate can adjust the speed according to the actual situation when it is folded, improving safety and reducing the risk of accidental injury; the voltage stabilizing module ensures the stable power supply of the control module, improves the overall stability of the system, and ensures reliable operation under various working conditions; the control device has a compact structure and is easy to integrate into the existing automobile tailgate system. The above functions can be realized without large-scale modification of the original vehicle, which is convenient and fast. This embodiment realizes the soft start of the motor by controlling the switch of the MOS tube through the control module. The soft start technology can gradually increase the input voltage or current of the motor, thereby avoiding the current peak at startup, effectively reducing the starting current, preventing the overload protection from being triggered, and improving the stability and safety of the system; through the intelligent control device, the use of the car tailgate is more convenient and efficient, and the overall user experience is improved; by reducing the current impact at startup and accurately controlling the motor speed, it helps to reduce the wear and failure rate of the motor, thereby extending the service life of the equipment.

[0035] In an optional embodiment, the above-mentioned device also includes a freewheeling module, wherein the freewheeling module is connected between the positive pole of the motor and the negative pole of the motor, and the freewheeling module is used to provide a freewheeling path for the motor when the power is off.

[0036] In the above embodiment, the freewheeling module is connected between the positive pole of the motor and the negative pole of the motor, and provides a freewheeling path for the motor when the power is off, thereby avoiding damage to electrical components caused by the reverse electromotive force generated by the motor at the moment of power failure, and improving the stability and reliability of the system. The freewheeling module provides a freewheeling path for the motor when the motor is powered off, effectively avoiding damage to the motor and the control module caused by the reverse electromotive force generated at the moment of power failure, and improving the stability and reliability of the system. When the motor is suddenly powered off or changes direction, due to the induction of the internal coil of the motor, a back electromotive force will be generated at both ends of the motor. If there is no appropriate freewheeling path, this back electromotive force may cause high-voltage spikes and damage other components in the circuit, such as MOS tubes or other sensitive electronic components; the back electromotive force will not only cause physical damage to the circuit components, but also generate electromagnetic interference, affecting the normal operation of the system and the operation of other electronic equipment. When the motor is powered off, the freewheeling module can be turned on quickly to release the energy stored in the motor inductance, thereby reducing the impact of the reverse electromotive force on the circuit and protecting the components in the circuit from damage; by setting the freewheeling module in the device, a freewheeling path is provided for the motor when the power is off, which can absorb or dissipate the energy generated by the reverse electromotive force, protect the MOS tube and other circuit components from damage, and extend the service life of the entire system; by providing a freewheeling path, the electromagnetic interference caused by the reverse electromotive force can be significantly reduced, the stability and reliability of the system can be improved, and the normal operation of other electronic equipment can be ensured; the introduction of the freewheeling module enhances the safety performance of the system, avoids sudden failures caused by reverse electromotive force, reduces the equipment failure rate, and improves the safety of operators; the freewheeling module not only helps to protect circuit components, but also optimizes the performance of the motor, making the motor more stable during the start-stop process, reducing mechanical wear and improving work efficiency. The addition of the freewheeling module improves the design of the control device of the DC motor of the tailgate of the car, so that it can show good performance and stability when handling various working conditions.

[0037] In an optional embodiment, the freewheeling module includes at least one diode, wherein the anode of the diode is electrically connected to the cathode of the motor, and the cathode of the diode is electrically connected to the anode of the motor, and the diode is used to provide a freewheeling path for the motor when power is off.

[0038] In the above embodiment, after the motor is powered off, due to inertia, the motor will still rotate for a period of time and generate back electromotive force in the process. If this back electromotive force is not properly handled, it may be reversely discharged through other components in the circuit, causing component damage or system instability; the freewheeling module includes at least one diode, the positive pole of the diode is electrically connected to the negative pole of the motor, and the negative pole of the diode is electrically connected to the positive pole of the motor. The diode provides a freewheeling path for the motor when the power is off, effectively avoiding the impact of the reverse electromotive force on the motor and the control module at the moment of power off, and improving the stability and reliability of the system. As a freewheeling element, the diode can timely introduce the back electromotive force into the freewheeling path when the motor is powered off, preventing the reverse current from impacting other components in the circuit, especially protecting key components such as MOS tubes, and significantly reducing the risk of component damage; by adding a freewheeling module composed of at least one diode between the positive and negative poles of the motor, a freewheeling path can be provided for the motor when the motor is powered off, so that the diode can be quickly turned on to release the energy stored in the inductor in the form of current, reducing the impact of the reverse electromotive force on the circuit and protecting the components in the circuit from damage; it can avoid sudden changes in load current and play a role in smoothing the current, thereby improving the operating stability of the entire system; using a diode as a freewheeling module has a simple structure, low cost, and is easy to implement. It also simplifies circuit design, reduces manufacturing cost and maintenance difficulty, can effectively solve the safety problems in the prior art, and improve the reliability and safety of the automobile tailgate control device.

[0039] In an optional embodiment, the above-mentioned device also includes a temperature control module, wherein the temperature control module is connected to the motor and the control module respectively, the temperature control module is used to collect the target temperature value and transmit the target temperature value to the control module, and the control module is also used to control the motor to stop running when it is determined that the target temperature value is greater than or equal to a preset temperature threshold, wherein the target temperature value includes a first temperature value of the motor and / or a second temperature value of the circuit board of the control module.

[0040] In the above embodiments, when the motor works for a long time or is in a high load state, the motor itself and the circuit board of its control module may overheat due to excessive current, poor heat dissipation, etc. If this overheating state is not controlled in time, it may cause the motor performance to decline, shorten its life, and even cause serious safety problems such as fire. The traditional automobile tailgate motor control device lacks an effective temperature monitoring and control mechanism and cannot respond to the overheating problem of the motor and the control module in time. In this embodiment, a temperature control module is added to the device, and the temperature control module is connected to the motor and the control module to collect the target temperature value and transmit the target temperature value to the control module. When the target temperature value is greater than or equal to the preset temperature threshold, the control module controls the motor to stop running, thereby realizing the temperature protection function. By introducing the temperature control module, real-time monitoring and overheating protection of the temperature of the motor and its control module are realized, solving the safety problems that may be caused by overheating of the motor and the control module, and achieving the technical effects of enhancing safety, protecting equipment, improving reliability and optimizing user experience. When the monitored temperature value exceeds the preset temperature threshold, the control module will control the motor to stop running, effectively preventing equipment damage and safety hazards caused by overheating. In practical applications, the temperature of the motor and the circuit board of the control module can be monitored separately, and different safety temperature thresholds can be set for the two. For example, for the motor, the safety temperature threshold (such as the preset first temperature threshold) is set to 70°C (or 75°C, or other), and for the circuit board of the control module, the safety temperature threshold (such as the preset second temperature threshold) can be set to 120°C (or other temperatures). The above preset temperature thresholds may include the preset first temperature threshold and the preset second temperature threshold. The application of the temperature control module in this embodiment makes the automobile tailgate DC motor control device more intelligent, which helps to improve the user experience and the overall performance of the system.

[0041] In an optional embodiment, the control module is further configured to control the power switch to open so as to cut off the power supply when it is determined that the target temperature value is greater than or equal to a preset temperature threshold.

[0042] In the above embodiment, when the target temperature value detected by the temperature control module exceeds the preset temperature threshold, the control module not only controls the motor to stop running, but also further controls the power switch to turn on and cut off the power supply, thereby fundamentally eliminating the safety hazards caused by overheating. By instantly cutting off the power, the equipment is prevented from being damaged due to overheating, possible fire risks are avoided, and the overall safety of the system is improved; the instant power-off protection mechanism improves the reliability of the system and reduces the failure rate caused by overheating; by providing more comprehensive overheating protection measures, the user's worries and uneasiness during use are reduced, further improving the user experience. At the same time, it also reduces equipment damage and maintenance costs caused by overheating.

[0043] In an optional embodiment, the above-mentioned device also includes a target remote control module, wherein the target control signal is sent from the target remote control module to the control module, the target remote control module is communicatively connected with the control module, and the target remote control module includes at least one of the following: a wired remote control module; a wireless remote control module.

[0044] In the above embodiment, the target remote control module is connected to the control module in communication, and can send a target control signal to the control module. The target remote control module includes a wired remote control module and a wireless remote control module. Thus, the user can remotely control the start and speed regulation of the motor through the target remote control module, which improves the convenience and flexibility of operation. Remote control operation reduces the physical contact between the user and the device, and reduces the difficulty and complexity of operation. The user can complete the operation in a more comfortable and safer environment. By introducing a wired or wireless remote control module, the operator can control the tailgate of the car from a longer distance, which improves the convenience and flexibility of operation; the remote control module allows the operator to operate away from the device, reducing the risk of the operator directly contacting the device, especially when the tailgate is folded or lowered, which can avoid possible personal injury caused by excessive speed; whether it is a wired or wireless remote control module, it can adapt to different application scenarios, especially the application of the wireless remote control module, so that the device can be used in a wider range of environments.

[0045] In an optional embodiment, when the target control signal is a first control signal, the control module is used to send a first drive signal to the MOS tube to soft-start the motor, wherein the first control signal is used to indicate a start operation on the tailgate of the automobile, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step size, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration.

[0046] In the above embodiment, when the target control signal is the first control signal, the control module sends a first drive signal to the MOS tube, and the motor is soft-started by gradually increasing the duty cycle of the first PWM signal, effectively avoiding the generation of peak current at the moment of startup, thereby preventing the overload protection function from being triggered, ensuring that the device can work normally, and improving safety. After the first PWM signal of the preset duration, it switches to the second PWM signal to maintain the stable operation of the motor. The duty cycle of the first PWM signal gradually increases according to the preset step length, so that the increase in current during the motor startup process is more stable, effectively avoiding the current shock at startup; the second PWM signal is a PWM signal with a preset duty cycle value, which can ensure that the motor can smoothly transition to a normal operating state after startup. The first control signal is used to instruct to start the tailgate of the automobile. The start operation may include the raising and lowering operation of the tailgate of the automobile, or the folding operation of the tailgate of the automobile, etc. For example, when an instruction is received to perform the raising operation on the tailgate of the automobile, a soft start process is required when the operation is just performed. Assume that the preset duration is 1s (or other duration), that is, within the 1s, the first PWM signal is a PWM signal with a gradually increasing duty cycle, for example, the duty cycle is 10% within 0-200ms, the duty cycle is 20% within 200-400ms, the duty cycle is 30% within 400-600ms, and so on. This is only an example. In actual applications, other duty cycles and other preset step sizes can be set. After 1s, the soft start operation is completed and the motor enters a normal working state. Assume that the preset duty cycle value is 50% (or 60%, or other). By sending the first PWM signal (the duty cycle gradually increases according to the preset step size), the soft start of the motor can be achieved. In this way, the current of the motor increases gradually when it starts, rather than suddenly surging. The gradually increasing PWM signal can effectively reduce the current impact at startup and reduce the loss to the motor and battery. By controlling the preset duration, the entire process of the motor soft start can be accurately controlled to ensure that the motor reaches normal operating speed within a safe time range.

[0047] In an optional embodiment, when the target control signal is a second control signal, the control module is used to send a second drive signal to the MOS tube to control the speed of the motor, wherein the second control signal is used to instruct the retracting operation of the tailgate of the automobile, and the second drive signal includes N segments of PWM signals, each segment of the N segments of PWM signals corresponds to a different time period during the retracting operation of the tailgate of the automobile, and the duty cycle of each segment of the N segments of PWM signals is different, and N is a positive integer greater than or equal to 2.

[0048] In the above embodiment, when the target control signal is the second control signal, the control module sends a second drive signal to the MOS tube to control the speed of the motor. The second drive signal includes N segments of PWM signals, each of which corresponds to a different period during the retracting operation of the automobile tailgate, and the duty cycle of each PWM signal is different, so that the speed control of the tailgate during the retracting process is realized, so that the tailgate can be operated in sections at different speeds when retracting, thereby improving safety. The traditional automobile tailgate control system lacks a speed control function when retracting the tailgate, which may cause the speed to be too fast, so that there is not enough reaction time in an emergency, which increases safety hazards. The control module sends the second drive signal to the MOS tube to achieve precise speed control of the motor, so that the tailgate can adjust the operating speed according to the needs of different time periods during the retracting operation, thereby improving the safety and efficiency of the operation. For example, through differentiated PWM signal control, a large power can be provided in the early stage of the retracting of the tailgate, and the tailgate can be decelerated smoothly near the closing stage to avoid dangers and damage caused by excessive speed. By using a combination of multiple PWM signals, the motor speed can be accurately adjusted according to actual needs to achieve fine control of the tailgate folding process; dynamic adjustment of the motor speed can reduce speed fluctuations and impacts during the folding process, reduce the risk of damage to the tailgate, transmission system and motor, and improve the stability and reliability of the entire system. For example, assuming that the entire folding process of the tailgate is 10S, take N=2 as an example (N can also be other values), the entire folding process can be divided into 2 sections, the first section is 0-5S, and the corresponding first section PWM signal duty cycle is 50% (or other), the second end is 5-10S, and the corresponding second section PWM signal duty cycle is 30% (or other).

[0049] In an optional embodiment, when the target control signal is the second control signal, the control module is used to send a second drive signal to the MOS tube to control the speed of the motor, wherein the second control signal is used to instruct the automobile tailgate to be retracted, and the second drive signal includes N continuous PWM signals, each of the N PWM signals corresponds to the automobile tailgate being in a position interval, and the duty cycle of each of the N PWM signals is different. For example, the retracting process of the automobile tailgate is divided into N stages, each stage corresponds to the automobile tailgate being in a position interval, for example, it can be an angle position, such as 0º-30º, or 30º-60º, or 60º-90º, etc.

[0050] The present application also provides a control method for a DC motor of a car tailgate, which is applied to a control device for a DC motor of a car tailgate in any of the above embodiments. Figure 2 This is a flow chart of a control method for a DC motor of a car tailgate provided in an embodiment of the present application, and the process includes: Step S201, the control module receives a target control signal; In step S202, the control module controls the switching of the MOS tube based on the target control signal, thereby performing soft start and speed control on the motor.

[0051] In the above embodiment, after the control module receives the target control signal, it can control the switch of the MOS tube, thereby soft-starting the motor, avoiding overload protection problems and equipment damage caused by peak current at startup, and ensuring safe and stable operation of the equipment. At the same time, according to different target control signals, the control module can send corresponding drive signals to achieve speed control of the motor when the tailgate is folded, improve operational safety, prevent dangerous situations caused by excessive speed, and ensure personnel safety. The soft start function avoids the generation of peak current at startup, and the speed regulation function can adjust the motor speed according to different situations to ensure the safe operation of the equipment. The control device of the DC motor of the automobile tailgate can effectively control the starting current, avoid the overload protection function triggered by instantaneous large current, ensure the normal operation of the equipment, and can adjust the motor speed in real time according to the control signal, improve operational safety, and prevent safety hazards caused by the rapid folding of the tailgate. The above motor is a DC motor. This embodiment reduces the current peak value when the motor starts through the soft start technology, avoids the overload protection from being triggered by mistake, reduces the risk of equipment out of control, and improves the safety of the entire system; adds the speed regulation function of the motor, and by adjusting the switch control signal of the MOS tube, the motor speed can be accurately adjusted, so that the movement speed of the tailgate can be flexibly controlled in different scenarios to ensure the safety and flexibility of operation. For example, the MOS tube can be controlled by PWM technology, so that the current in the motor startup process gradually increases instead of a sudden surge, reducing the impact on the battery and other electrical components; in addition, by controlling the MOS tube with PWM, the speed of the motor can be adjusted as needed, so that the tailgate can adjust the speed according to the actual situation when it is folded, improving safety and reducing the risk of accidental injury; the voltage stabilizing module ensures the stable power supply of the control module, improves the overall stability of the system, and ensures reliable operation under various working conditions; the control device has a compact structure and is easy to integrate into the existing automobile tailgate system. The above functions can be realized without large-scale modification of the original vehicle, which is convenient and fast. This embodiment realizes the soft start of the motor by controlling the switch of the MOS tube through the control module. The soft start technology can gradually increase the input voltage or current of the motor, thereby avoiding the current peak at startup, effectively reducing the starting current, preventing the overload protection from being triggered, and improving the stability and safety of the system; through the intelligent control device, the use of the car tailgate is more convenient and efficient, and the overall user experience is improved; by reducing the current impact at startup and accurately controlling the motor speed, it helps to reduce the wear and failure rate of the motor, thereby extending the service life of the equipment.

[0052] In an optional embodiment, the control module performs switch control on the MOS tube based on the target control signal, thereby soft-starting and speed-regulating the motor, including: when the target control signal is a first control signal, the control module is used to send a first drive signal to the MOS tube to soft-start the motor, wherein the first control signal is used to indicate that a start operation is performed on the tail board of the automobile, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step length, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration; when the target control signal is a second control signal, the control module is used to send a second drive signal to the MOS tube to speed-regulate the motor, wherein the second control signal is used to indicate that a retracting operation is performed on the tail board of the automobile, and the second drive signal includes N-segment PWM signals, each segment of the N-segment PWM signals corresponds to a different time period during the retracting operation of the tail board of the automobile, and each segment of the N-segment PWM signals has a different duty cycle, and N is a positive integer greater than or equal to 2.

[0053] In the above embodiment, when the target control signal is the first control signal, the control module sends a first drive signal to the MOS tube, and the motor is soft-started by gradually increasing the duty cycle of the first PWM signal, effectively avoiding the generation of peak current at the moment of startup, thereby preventing the overload protection function from being triggered, ensuring that the device can work normally, and improving safety. After the first PWM signal of the preset duration, it switches to the second PWM signal to maintain the stable operation of the motor. The duty cycle of the first PWM signal gradually increases according to the preset step length, so that the increase in current during the motor startup process is more stable, effectively avoiding the current shock at startup; the second PWM signal is a PWM signal with a preset duty cycle value, which can ensure that the motor can smoothly transition to a normal operating state after startup. The first control signal is used to instruct to start the tailgate of the automobile. The start operation may include the raising and lowering operation of the tailgate of the automobile, or the folding operation of the tailgate of the automobile, etc. For example, when an instruction is received to perform the raising operation on the tailgate of the automobile, a soft start process is required when the operation is just performed. Assume that the preset duration is 1s (or other duration), that is, within the 1s, the first PWM signal is a PWM signal with a gradually increasing duty cycle, for example, the duty cycle is 10% within 0-200ms, the duty cycle is 20% within 200-400ms, the duty cycle is 30% within 400-600ms, and so on. This is only an example. In actual applications, other duty cycles and other preset step sizes can be set. After 1s, the soft start operation is completed and the motor enters a normal working state. Assume that the preset duty cycle value is 50% (or 60%, or other). By sending the first PWM signal (the duty cycle gradually increases according to the preset step size), the soft start of the motor can be achieved. In this way, the current of the motor increases gradually when it starts, rather than suddenly surging. The gradually increasing PWM signal can effectively reduce the current impact at startup and reduce the loss to the motor and battery. By controlling the preset duration, the entire process of the motor soft start can be accurately controlled to ensure that the motor reaches normal operating speed within a safe time range.

[0054] In the above embodiment, when the target control signal is the second control signal, the control module sends a second drive signal to the MOS tube to control the speed of the motor. The second drive signal includes N segments of PWM signals, each of which corresponds to a different period during the retracting operation of the automobile tailgate, and the duty cycle of each PWM signal is different, so that the speed control of the tailgate during the retracting process is realized, so that the tailgate can be operated in sections at different speeds when retracting, thereby improving safety. The traditional automobile tailgate control system lacks a speed control function when retracting the tailgate, which may cause the speed to be too fast, so that there is not enough reaction time in an emergency, which increases safety hazards. The control module sends the second drive signal to the MOS tube to achieve precise speed control of the motor, so that the tailgate can adjust the operating speed according to the needs of different time periods during the retracting operation, thereby improving the safety and efficiency of the operation. For example, through differentiated PWM signal control, a large power can be provided in the early stage of the retracting of the tailgate, and the tailgate can be decelerated smoothly near the closing stage to avoid dangers and damage caused by excessive speed. By using a combination of multiple PWM signals, the motor speed can be accurately adjusted according to actual needs to achieve fine control of the tailgate folding process; dynamic adjustment of the motor speed can reduce speed fluctuations and impacts during the folding process, reduce the risk of damage to the tailgate, transmission system and motor, and improve the stability and reliability of the entire system. For example, assuming that the entire folding process of the tailgate is 10S, take N=2 as an example (N can also be other values), the entire folding process can be divided into 2 sections, the first section is 0-5S, and the corresponding first section PWM signal duty cycle is 50% (or other), the second end is 5-10S, and the corresponding second section PWM signal duty cycle is 30% (or other).

[0055] It should be noted that the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application will be described in detail below in conjunction with specific embodiments.

[0056] The present application provides a soft-start positive pole control module for a high-power DC brushed motor on a car tailgate. Figure 3 This is a principle block diagram of a soft-start positive pole control module for a car tailgate DC motor provided in an embodiment of the present application. The principle block diagram is described below.

[0057] The soft start positive control module (corresponding to the control device of the aforementioned automobile tailgate DC motor) includes a power supply for supplying power to the control module (such as Figure 3 The single chip microcomputer in the embodiment corresponds to the control module in the above embodiment) and the motor power supply; the control module includes the functions of temperature protection, motor speed regulation, and wireless remote control; The power supply is connected to the control module through a power switch and a voltage stabilizing power supply (corresponding to the aforementioned voltage stabilizing module); The gate of the MOS tube is connected to the control module, the drain of the MOS tube is connected to the positive electrode of the power supply, and the source of the MOS tube is connected to the positive electrode of the motor; The freewheeling circuit (corresponding to the freewheeling module) is connected to the positive and negative electrodes of the motor; The temperature control module is connected to the motor and the single-chip control module (i.e. the aforementioned control module); The wired remote control module is connected to the single-chip control module, and the wireless remote control module is connected to the single-chip control module; The starting current of the tailgate DC motor is controlled by the single-chip control module to control the MOS tube to limit the starting current; When the tailgate is folded, the speed is adjusted by the wired remote control module, the wireless remote control module and the single-chip control module controlling the MOS tube to adjust the speed; The temperature monitoring module transmits the monitoring signal to the microcontroller control module to control the MOS tube to cut off the power supply of the motor.

[0058] Embodiment 1 use Figure 3 The positive control module shown in the figure, in this embodiment, the power supply is connected to the single-chip control module through a power switch and a voltage-stabilized power supply. It also includes a motor, a freewheeling circuit, a wired remote control module, a wireless remote control module and a MOS tube, the freewheeling circuit is connected to the positive and negative ends of the motor, the MOS tube gate is connected to the single-chip control module, the MOS tube drain is connected to the positive pole of the power supply, and the MOS tube source is connected to the positive pole of the motor.

[0059] Working principle: When the power switch is closed, the voltage regulator supplies power to the microcontroller, and the microcontroller enters the standby state. When the wired remote control module or the wireless remote control module inputs the signal (corresponding to the aforementioned target control signal) into the microcontroller, the microcontroller starts to control the switching frequency and time of the MOS tube to control the motor to run slowly and finally reach the normal speed. Thus, the soft start function is realized, avoiding the peak current generated by the general motor at the moment of starting.

[0060] Embodiment 2 Reference Figure 3 Based on the same concept as the first embodiment, the soft start positive pole control module of the high-power DC brushed motor of the automobile tailgate further includes: a temperature control module for detecting the temperature of the soft start module and the motor. When the temperature monitored by the temperature control module reaches a set threshold value 1, the single chip will give a command to suspend the operation of the motor, cut off the power supply and alarm, so that the motor is not controlled by the signal of the wired remote control module or the wireless remote control module, until the temperature drops to a set threshold value 2, the single chip cancels the suspension and alarm commands, and the wired remote control module or the wireless remote control module resumes the control function.

[0061] Embodiment 3 Reference Figure 3Based on the same concept as the first embodiment, the soft start positive pole control module of the high-power DC brushed motor of the automobile tailgate is also used for: when the single-chip microcomputer controls the tailgate to be folded, the motor speed will be controlled according to different time periods to achieve the purpose of safe operation. When the wired remote control module or the wireless remote control module gives a signal to fold the tailgate, the single-chip microcomputer controls the MOS tube through carriers of different frequencies to achieve the speed regulation function of the motor.

[0062] The embodiment of the present application provides a soft-start module for a high-power brushed DC motor of a tailgate, which can effectively control the starting current of the DC motor of the tailgate, thereby avoiding equipment operation failures due to overcurrent protection; at the same time, it also ensures safety problems caused by excessive speed when the tailgate is folded, thereby maximally ensuring the safety of vehicle operation after the tailgate is installed; and monitors the temperature in real time, thereby avoiding equipment damage and economic losses caused by overheating.

[0063] The embodiments of the present application limit the starting current of the tailgate, temperature monitoring protection and motor speed regulation without changing the power supply system of the original vehicle and without affecting the application of the tailgate, thereby avoiding the problem of instantaneous large current triggering vehicle failure and safety assurance.

[0064] The embodiment of the present application utilizes a single-chip microcomputer for control and adopts a high-power MOS tube for output. During operation, parameters such as temperature are monitored in real time and adjusted in real time to ensure that the starting current of the tailgate DC motor and the opening and closing speed of the tailgate can be effectively controlled during the entire operation process, thereby avoiding triggering the vehicle's overcurrent protection function and endangering human safety, while ensuring the normal operation of the motor and preventing the equipment from being damaged. In this way, the impact on the vehicle after the installation of the tailgate can be avoided, and the operating safety of the vehicle after the installation of the tailgate can be guaranteed to the greatest extent.

[0065] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0066] The present application also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed, any one of the method steps described above is executed.

[0067] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0068] The present application also discloses an electronic device. Figure 4 As shown, Figure 4 The electronic device 400 may include: at least one processor 401 , at least one communication bus 402 , a user interface 403 , at least one network interface 404 , and a memory 405 .

[0069] The communication bus 402 is used to realize the connection and communication between these components.

[0070] The user interface 403 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 403 may also include a standard wired interface and a wireless interface.

[0071] The network interface 404 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0072] Among them, the processor 401 may include one or more processing cores. The processor 401 uses various interfaces and lines to connect various parts of the entire electronic device (such as a server), and executes various functions of the server and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 405, and calling data stored in the memory 405. Optionally, the processor 401 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 401 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 401, and it can be implemented separately through a chip.

[0073] Among them, the memory 405 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 405 includes a non-transitory computer-readable storage medium. The memory 405 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 405 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 405 may optionally also be at least one storage device located away from the aforementioned processor 401. Refer to Figure 4 , the memory 405 as a computer storage medium may include an operating system, a network communication module, a user interface module and an application program of a control method for a car tailgate DC motor.

[0074] exist Figure 4 In the electronic device 400 shown, the user interface 403 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 401 can be used to call an application program of a control method of a car tailgate DC motor stored in the memory 405, and when executed by one or more processors 401, the electronic device 400 executes one or more of the methods described in the above embodiments. It should be noted that for the aforementioned method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for the present application.

[0075] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0077] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0079] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: various media that can store program codes, such as USB flash drives, mobile hard drives, magnetic disks or optical disks.

[0080] The above is only an exemplary embodiment of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and the practice disclosure, those skilled in the art will easily think of other embodiments of the present disclosure.

[0081] This application is intended to cover any modifications, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the technical field not recorded in the present disclosure.

Claims

1. A control device for a DC motor of a car tailgate, characterized in that: include: Control module, power supply, motor, MOS tube, power switch, voltage regulator module, among which, The power supply is electrically connected to the voltage stabilizing module through the power switch, the output end of the voltage stabilizing module is electrically connected to the control module, and the power supply is used to provide a stable working voltage for the control module through the voltage stabilizing module; The positive electrode of the power supply is also electrically connected to the drain electrode of the MOS tube through the power switch, the gate electrode of the MOS tube is electrically connected to the control module, the source electrode of the MOS tube is electrically connected to the positive electrode of the motor, and the negative electrode of the motor is electrically connected to the negative electrode of the power supply; The power supply is also used to supply power to the motor, and the control module is used to receive a target control signal and perform switch control on the MOS tube based on the target control signal, thereby performing soft start and speed control on the motor.

2. The device according to claim 1, characterized in that The device further comprises a freewheeling module, wherein the freewheeling module is connected between the positive pole of the motor and the negative pole of the motor, and the freewheeling module is used to provide a freewheeling path for the motor when power is off.

3. The device according to claim 2, characterized in that The freewheeling module includes at least one diode, wherein the positive pole of the diode is electrically connected to the negative pole of the motor, and the negative pole of the diode is electrically connected to the positive pole of the motor, and the diode is used to provide a freewheeling path for the motor when power is off.

4. The device according to claim 1, characterized in that The device also includes a temperature control module, wherein the temperature control module is connected to the motor and the control module respectively, the temperature control module is used to collect a target temperature value and transmit the target temperature value to the control module, and the control module is also used to control the motor to stop running when it is determined that the target temperature value is greater than or equal to a preset temperature threshold, wherein the target temperature value includes a first temperature value of the motor and / or a second temperature value of a circuit board of the control module.

5. The device according to claim 4, characterized in that The control module is further configured to control the power switch to turn on so as to cut off the power supply when it is determined that the target temperature value is greater than or equal to the preset temperature threshold.

6. The device according to claim 1, characterized in that The device also includes a target remote control module, wherein the target control signal is sent from the target remote control module to the control module, the target remote control module is communicatively connected with the control module, and the target remote control module includes at least one of the following: a wired remote control module; a wireless remote control module.

7. The device according to any one of claims 1 to 6, characterized in that When the target control signal is the first control signal, the control module is used to send a first drive signal to the MOS tube to perform the soft start on the motor, wherein the first control signal is used to indicate the start operation of the automobile tailgate, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step length, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration.

8. The device according to any one of claims 1 to 6, characterized in that When the target control signal is the second control signal, the control module is used to send a second drive signal to the MOS tube to control the speed of the motor, wherein the second control signal is used to instruct the automobile tailgate to be retracted, and the second drive signal includes N segments of PWM signals, each segment of the N segments of PWM signals corresponds to a different time period during the retracting operation of the automobile tailgate, and the duty cycle of each segment of the N segments of PWM signals is different, and N is a positive integer greater than or equal to 2.

9. A control method for a DC motor of a car tailgate, characterized in that: The device according to any one of claims 1 to 8 comprises: The control module receives a target control signal; The control module performs switch control on the MOS tube based on the target control signal, thereby performing soft start and speed control on the motor.

10. The method according to claim 9, characterized in that The control module performs switch control on the MOS tube based on the target control signal, thereby soft-starting and speed regulating the motor, including: In the case where the target control signal is a first control signal, the control module is used to send a first drive signal to the MOS tube to perform the soft start on the motor, wherein the first control signal is used to instruct to perform a start operation on the tailgate of the automobile, and the first drive signal includes a first PWM signal and a second PWM signal, the first PWM signal is a PWM signal whose duty cycle gradually increases according to a preset step length, the second PWM signal is a PWM signal with a preset duty cycle value, and the duration of the first PWM signal is a preset duration; When the target control signal is the second control signal, the control module is used to send a second drive signal to the MOS tube to control the speed of the motor, wherein the second control signal is used to instruct the automobile tailgate to be retracted, and the second drive signal includes N segments of PWM signals, each segment of the N segments of PWM signals corresponds to a different time period during the retracting operation of the automobile tailgate, and the duty cycle of each segment of the N segments of PWM signals is different, and N is a positive integer greater than or equal to 2.

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