A LIN and CAN communication H-bridge electric pedal controller

Abstract

This utility model discloses a LIN and CAN communication H-bridge electric pedal controller, belonging to the field of intelligent electric side pedal controllers. It includes a control unit, a power supply unit, and a motor drive unit: the power supply unit converts the 12V vehicle power supply to a stable 5V voltage via a 5V LDO module; the control unit integrates an MCU module, CAN communication, LIN communication, and hard-wired signal processing modules to achieve multi-communication interaction, and works with voltage, current, and temperature detection modules to monitor the status in real time; the motor drive unit uses an H-bridge drive module composed of MOSFETs, combined with Hall signal detection to achieve precise control of motor direction and speed. This utility model adapts to multiple vehicle platforms through multi-communication, improves safety through full-parameter detection, and enhances control accuracy and extends device life through H-bridge drive and Hall feedback, making it suitable for the control of electric pedals in vehicles with high functional requirements.

Description

Technical Field

[0001] This utility model relates to the field of electric side pedal controllers, specifically a LIN and CAN communication H-bridge electric pedal controller. Background Technology

[0002] Existing controllers mostly use relays as motor switches and direction control components, and their structure mainly consists of simple control and drive circuits, which can only meet basic telescopic function requirements. However, existing technology has significant shortcomings: First, its functions are incomplete, its communication method is limited to hard-wired signal transmission, making it unsuitable for multiple vehicle platforms and lacking passenger protection functions such as anti-pinch and anti-collision, and abnormal alarms. It also lacks critical safety designs such as voltage protection, temperature protection, and fault diagnosis, making it unsuitable for vehicles with higher functional requirements. Second, there are defects in component performance and circuit design. The relay control method results in the motor lacking speed regulation, severe mechanical wear, short component lifespan, and low circuit integration, making it impossible to achieve real-time monitoring of key parameters such as voltage, current, and temperature. This leads to poor controller safety and insufficient reliability, making it difficult to meet the development requirements of modern intelligent and high-safety vehicles. Summary of the Invention

[0003] This invention aims to solve the aforementioned problems in the prior art. The controller and the vehicle body can communicate through various communication methods such as CAN chip communication, LIN chip communication, and vehicle body hard-wire signal communication, enabling a single controller to be universally applicable on multiple platforms and improving the applicability of the device.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A LIN and CAN communication H-bridge electric pedal controller includes a control unit, a power supply unit, and a motor drive unit. The power supply unit is electrically connected to the control unit and provides power. The control unit includes an MCU module, a CAN communication module, a LIN communication module, and a hard-wired signal processing module, which are electrically connected to the MCU module. The motor drive unit includes a MOSFET drive module and an H-bridge motor drive module. The MCU module is electrically connected to the MOSFET drive module, and the MOSFET drive module is electrically connected to the H-bridge motor drive module. The H-bridge motor drive module is used to connect to an external electric pedal motor.

[0006] By adopting the above technical solution, integrating the control unit, power supply unit, and motor drive unit, and incorporating CAN communication, LIN communication, and hard-wired signal processing modules within the control unit, while using a MOSFET drive module and an H-bridge motor drive module to form the motor drive unit, the problems of limited controller communication functionality, poor adaptability, and insufficient motor control precision in existing technologies are fundamentally solved. The multi-communication module design allows the controller to flexibly interact with the vehicle body via CAN, LIN, or hard-wired signals, achieving universality of a single controller across different platform vehicle models. Furthermore, the H-bridge motor drive module, in conjunction with the MOSFET drive module, lays the hardware foundation for precise control of motor steering and speed, replacing traditional relay control methods, avoiding the wear and short lifespan issues associated with mechanical switches, and improving the controller's versatility, compatibility, and drive reliability.

[0007] Furthermore, the power supply unit includes a 5V LDO module, the input of which is electrically connected to a 12V power supply, and the output of which is electrically connected to an MCU module.

[0008] By adopting the above technical solution, and by setting a 5V LDO module in the power supply unit, the 12V vehicle power supply is converted into a stable 5V voltage to power the MCU module of the control unit, solving the problem of abnormal control unit operation caused by unstable power supply in the prior art. The 5V LDO module has a voltage regulation function, which can effectively filter out voltage fluctuations and noise in the vehicle power supply, providing a stable operating voltage for the MCU and related detection circuits, avoiding the impact of voltage fluctuations on control logic and signal acquisition accuracy. At the same time, it is compatible with the vehicle 12V power supply environment, ensuring that the control unit can still work reliably when the vehicle voltage changes, thus improving the power adaptability and stability of the controller.

[0009] Furthermore, the control unit also includes a voltage detection module, the input of which is electrically connected to a 12V power supply, and the output of which is electrically connected to the MCU module.

[0010] By adopting the above technical solution, and by setting up a voltage detection module to monitor the 12V input voltage in real time and feed it back to the MCU, the problem of the lack of voltage protection in the existing technology, which makes the controller susceptible to damage from abnormal voltage, is solved. This module can collect the power input voltage in real time. When overvoltage or undervoltage is detected, the MCU can trigger the protection mechanism in time to avoid damage to the precision components in the control unit due to abnormal voltage, extend the life of the controller, and improve the safety of the system in complex vehicle power supply environments.

[0011] Furthermore, the control unit also includes a current detection module, the input of which is electrically connected to the bus of the H-bridge motor drive module, and the output of which is electrically connected to the MCU module.

[0012] By adopting the above technical solution, a current detection module is connected in series with the power supply bus of the H-bridge motor drive module to detect the bus current of the motor drive circuit in real time and feed it back to the MCU, solving the problems of lack of current protection and anti-pinch / anti-collision functions in the existing technology. This module can monitor the motor operating current in real time. When overcurrent or overload occurs, the MCU can quickly cut off the motor drive to prevent motor burnout or circuit damage. At the same time, changes in the current signal can be used as the basis for anti-pinch / anti-collision judgment, triggering the pedal to stop or reverse action, effectively protecting passenger safety and improving the safety and reliability of the system.

[0013] Furthermore, the control unit also includes a temperature detection module, the detection end of which is located on the PCB board, and the output end is electrically connected to the MCU module.

[0014] By adopting the above technical solution, a temperature detection module is mounted on the core area of ​​the PCB board to monitor the controller's operating temperature in real time and feed it back to the MCU. This solves the problem of short device lifespan and poor stability caused by the lack of temperature protection in existing technologies. This module can accurately monitor the temperature of the controller's core components. When the temperature is too high or too low, the MCU can activate temperature compensation or protection measures to prevent abnormal temperature from causing device performance degradation or permanent damage, thus extending the controller's lifespan and ensuring stable operation even in extreme temperature environments.

[0015] Furthermore, the motor drive unit also includes a Hall signal detection module. The input terminal of the Hall signal detection module is used to connect to the Hall sensor of the external electric pedal motor, and the output terminal is electrically connected to the MCU module.

[0016] By adopting the above technical solution, the Hall sensor of the motor is connected to the Hall signal detection module to collect motor speed and direction signals and feed them back to the MCU. This solves the problem of low control accuracy caused by the lack of motor speed control and reliance on relay switches in existing technologies. The Hall signal provides real-time feedback on the motor's operating status to the MCU, enabling the MCU to dynamically adjust the PWM drive signal according to the target speed, achieving precise speed regulation and direction control of the motor. At the same time, speed feedback can be used to determine whether the motor is abnormal, improving the accuracy of motor control, response speed, and fault diagnosis capabilities, and extending the service life of the pedal mechanical structure.

[0017] Furthermore, the H-bridge motor drive module includes at least two MOSFETs, the gates of which are electrically connected to the output terminals of the MOSFET drive module, and the drains and sources of which are electrically connected to the two ends of an external electric pedal motor, respectively.

[0018] By adopting the above technical solution, and by clearly defining that the H-bridge motor drive module consists of at least four MOSFETs, with the gate connected to the MOSFET drive module and the drain-source connected to the two ends of the motor, the problems of slow response, short lifespan, and inability to achieve speed regulation in existing relay control technologies are solved. MOSFETs, as semiconductor switches, have the characteristics of fast switching speed, no mechanical wear, and low on-resistance. Combined with the H-bridge topology, the forward and reverse rotation of the motor can be achieved by controlling different combinations of MOSFET conduction. Simultaneously, the MCU can precisely control the conduction time of the MOSFETs by adjusting the duty cycle of the PWM signal, achieving stepless adjustment of the motor speed, meeting the smoothness requirements of pedal extension or retraction, improving drive efficiency and control flexibility, and adapting to the pedal action characteristics of different vehicle models.

[0019] Furthermore, the hard-wire signal processing module includes at least one set of hard-wire interface circuits, the input of which is used to connect to the hard-wire signal of the vehicle body, and the output is electrically connected to the MCU module.

[0020] By adopting the above technical solution, the hard-wired signals of the vehicle body are connected to the MCU through the hard-wired interface circuit of the hard-wired signal processing module, solving the problems of easy interference and poor adaptability of hard-wired signal transmission in the prior art. The hard-wired interface circuit performs voltage regulation, current limiting, and filtering on the vehicle body input signals to ensure the stability and reliability of signal transmission; at the same time, the design of at least one set of hard-wired interface circuits allows the controller to be adapted to traditional vehicle models that do not support CAN and LIN communication.

[0021] This utility model has the following beneficial effects:

[0022] 1. This utility model integrates a CAN communication module, a LIN communication module, and a hard-wired signal processing module into the control unit, realizing multi-mode interaction with the vehicle body via CAN communication, LIN communication, or hard-wired signals. This solves the problem of the single communication function of the controller in the prior art, enabling a single controller to be adapted to different platform vehicle models, and improving the versatility and compatibility of the controller.

[0023] 2. This utility model, by setting up a voltage detection module, a current detection module, and a temperature detection module, monitors the 12V input voltage, the motor drive bus current, and the PCB board operating temperature in real time and feeds them back to the MCU. When abnormalities such as overvoltage, undervoltage, overcurrent, overload, or overtemperature are detected, the MCU can trigger the protection mechanism in time to avoid damage to the devices. This solves the problem of lack of protection for key parameters in the prior art and improves the safety and stability of the controller.

[0024] 3. This utility model replaces the traditional relay control method by using an H-bridge motor drive module composed of MOSFETs in conjunction with a Hall signal detection module. The Hall signal provides real-time feedback on motor speed and direction to the MCU, enabling the MCU to dynamically adjust the PWM drive signal to achieve precise speed regulation and direction control of the motor. This solves the problems of no motor speed control and low precision in the prior art, improves the accuracy and response speed of motor control, and reduces mechanical wear.

[0025] 4. This utility model uses the hard-wire interface circuit in the hard-wire signal processing module to perform voltage stabilization, current limiting, and filtering on the hard-wire signals of the vehicle body, ensuring the stability of signal transmission and anti-interference capability. At the same time, it is compatible with traditional vehicle models that do not support CAN / LIN communication, complementing multiple communication modules, further enhancing the platform adaptability of the controller, and reducing the R&D and adaptation costs for vehicle manufacturers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the connection between the controller of this utility model and the electric side pedal and the vehicle body;

[0027] Figure 2 This is a schematic diagram of the intelligent electric side pedal control circuit connection of this utility model;

[0028] Figure 3 This is the 12V to 5V circuit in the controller of this utility model;

[0029] Figure 4 This is the MOSFET drive circuit in the controller of this utility model;

[0030] Figure 5 This is the H-bridge motor drive circuit in the controller of this utility model;

[0031] Figure 6 This is the current sampling circuit in the controller of this utility model;

[0032] Figure 7 This is the CAN module circuit in the controller of this utility model;

[0033] Figure 8 This is the LIN module circuit in the controller of this utility model;

[0034] Figure 9 This is the temperature detection module circuit in the controller of this utility model;

[0035] Figure 10 This is the voltage detection module circuit in the controller of this utility model;

[0036] Figure 11 This is the hard-wired signal circuit in the controller of this utility model. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0038] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0039] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As can be seen, this utility model discloses a LIN and CAN communication H-bridge electric pedal controller, which integrates and assembles various components using a PCB board as a carrier. The overall design is divided into three main functional areas: a control unit, a power supply unit, and a motor drive unit. The power supply unit is located near the power interface on the edge of the PCB board. Its core component, the 5V LDO module, has its input terminal directly connected to the 12V vehicle power interface via copper foil. The output terminal, after passing through a voltage regulator circuit, is connected to the MCU module in the center of the control unit via wires, providing it with a stable 5V operating voltage. At the same time, the 12V power input terminal is also connected to the detection terminal of the voltage detection module via branch copper foil. This module is located close to the power interface area, and its output terminal is connected to the corresponding pin of the MCU via an analog signal line. The control unit is centrally located, with the MCU module mounted as the core on the center of the PCB board. Surrounding it are the CAN communication module, LIN communication module, and hard-wired signal processing module. The signal input terminals of the three modules are connected to the vehicle's CAN bus, LIN bus, and hard-wired signal terminals respectively through communication interfaces on the edge of the PCB board. The output terminals are all electrically connected one-to-one to the MCU's communication pins through digital signal lines. The NTC temperature sensor of the temperature detection module is mounted in the core area of ​​the PCB board. Its detection terminal is connected to the MCU's analog signal input terminal through a resistor voltage divider circuit to collect the temperature of the core area in real time. The motor drive unit is located in the power area of ​​the PCB board. The H-bridge motor drive module consists of at least four MOSFETs, mounted on a PCB area with heat sink pads. The gates of the MOSFETs are connected to adjacent MOSFET drive modules via drive lines. The input of the drive module is connected to the control signal output of the MCU via a PWM signal line. The power output of the H-bridge module is connected to the motor interface on the edge of the PCB board via a wire for connecting an external electric pedal motor. The current detection module is connected in series with the power supply bus of the H-bridge module, with its detection end close to the copper foil of the bus. Its output is connected to the current sampling pin of the MCU via a signal line. The interface circuit of the Hall signal detection module is close to the motor interface. Its input is connected to the Hall signal terminal of the motor interface via a wire, and its output is connected to the speed detection pin of the MCU via a digital signal line. All modules are electrically connected through the copper foil inside the PCB board. The power lines use a wide copper foil design to reduce impedance, and the signal lines use shielding or short-path layouts to reduce interference. The overall layout is compact and the functional areas are clearly defined, ensuring the stability and reliability of the collaborative operation of all components.

[0040] In one embodiment, refer to Figure 2 , Figure 3 It can be seen that this utility model Figure 3The 12V to 5V circuit shown achieves voltage conversion through the synergistic action of a power conversion chip, MOSFET, inductor, capacitor, and resistor. The specific principle is as follows: The 12V vehicle power supply first passes through an input capacitor, an electrolytic capacitor, and a ceramic capacitor connected in parallel to filter out high-frequency ripple. Then, it is connected to the drain of the MOSFET through a series current-limiting resistor. The MOSFET's gate is controlled by a signal from the MCU or enable circuit, controlling the power path's on / off state. When the MOSFET is on, the 12V voltage is input to the Vin pin of the power conversion chip. Internally, the chip uses PWM modulation to control the on / off state of its built-in switching transistor, converting the input DC power into a high-frequency pulse signal. This pulse signal is then stored in an external inductor. The chip and its output capacitor filter network perform energy conversion and ripple filtering, ultimately outputting a stable 5V DC voltage at the chip's Vout pin. The feedback resistor network in the circuit consists of pull-up and pull-down resistors connected to the chip's FB pin, sampling the output voltage in real time and comparing it with the internal reference voltage. The PWM duty cycle is adjusted through negative feedback to ensure that the output voltage is stable at 5V. At the same time, the chip's EN pin is pulled up to the power supply through a resistor. With the MOSFET's turn-off control, the power supply path can be cut off when the 5V output is not needed, reducing static power consumption. The capacitor connected in parallel at the output further filters out low-frequency ripple, providing a low-noise operating voltage for the subsequent MCU and sampling circuit, achieving efficient and stable conversion from 12V to 5V.

[0041] In one embodiment, refer to Figure 4 , Figure 5 Therefore, the overall drive circuit works as follows: the MCU module outputs a PWM signal with control logic based on the received vehicle communication signal and the motor speed and steering signal fed back from the Hall sensor. Figure 4 The MOSFET driver circuit shown consists of diodes, transistors, resistors, and capacitors. The transistors act as switching amplifiers, amplifying the weak PWM signal output from the MCU into a strong drive signal sufficient to turn the MOSFET on or off. Simultaneously, the diodes and capacitors provide reverse voltage protection and signal filtering, ensuring the stability of the drive signal. The amplified drive signal is transmitted through wires to… Figure 5The H-bridge motor drive circuit shown has MOSFET gates. The H-bridge circuit consists of at least four MOSFETs divided into upper arm and lower arm groups. The MCU controls the conduction combinations of different MOSFET groups. For example, when the MOSFETs on the left side of the upper arm and the right side of the lower arm are turned on, a positive voltage is formed across the motor, driving the motor to rotate forward; when the MOSFETs on the right side of the upper arm and the left side of the lower arm are turned on, a reverse voltage is formed across the motor, driving the motor to rotate in reverse, thus achieving motor direction control. At the same time, the MCU controls the conduction time of the MOSFETs by adjusting the duty cycle of the PWM signal, changing the average voltage across the motor. Combined with the real-time speed signal feedback from the Hall sensor, the duty cycle is dynamically adjusted to achieve precise adjustment of the motor speed. The higher the duty cycle, the greater the average voltage, and the faster the speed. The resistors in the H-bridge motor drive circuit are used to limit the gate current and protect the MOSFETs. Finally, by controlling the on and off states of the MOSFETs and the PWM duty cycle, the magnitude and direction of the current flowing through the motor are changed, realizing the forward and reverse rotation, speed adjustment, and soft start / brake actions of the electric pedal motor, thereby controlling the extension and retraction of the pedal.

[0042] In one embodiment, refer to Figure 6 As can be seen, the current sampling circuit of the controller mainly consists of an operational amplifier, resistors, and capacitors. Structurally, it is connected in series with the sampling resistor to the lower bus of the H-bridge motor drive circuit. The voltage signal across the sampling resistor is input to the operational amplifier for amplification and filtering after being divided by the resistor. The capacitor is used to filter out high-frequency noise. This circuit detects the bus current of the motor drive circuit in real time, converts the current signal into an analog voltage signal that the MCU can recognize, and transmits it to the MCU to realize the monitoring of motor overcurrent, overload, and dry running status. When the current is abnormal, the protection mechanism is triggered to avoid damage to the motor or drive circuit.

[0043] In one embodiment, refer to Figure 7 As can be seen, the CAN module consists of a CAN communication chip, capacitors, and resistors. The CAN communication chip is the core component. Its signal input terminal is connected to the vehicle's CAN bus interface through a resistor, and its output terminal is electrically connected to the MCU's communication pin. The capacitor is used for power supply filtering and signal stabilization. This circuit realizes CAN bus communication between the controller and the vehicle body, supports high-speed and high-reliability data transmission, can receive vehicle commands such as vehicle speed signals and door status, and feed back the controller's working status. It also has certain electrical protection functions to prevent bus interference or overvoltage from damaging the chip.

[0044] In one embodiment, refer to Figure 8As can be seen, the LIN module circuit mainly consists of a LIN communication chip, capacitors, and resistors. Its structure is similar to that of the CAN module. The signal input terminal of the LIN communication chip is connected to the vehicle's LIN bus interface through a resistor, and the output terminal is electrically connected to the MCU's communication pin. The capacitor is used to filter out power supply noise and stabilize the communication signal. This circuit realizes LIN bus communication between the controller and the vehicle body. It is suitable for low-speed, low-cost signal transmission scenarios, such as door auxiliary signals and status feedback. It complements the CAN module, enhances the controller's communication compatibility, and also has basic bus protection functions.

[0045] In one embodiment, refer to Figure 9 As can be seen, the temperature detection module circuit mainly consists of an NTC negative temperature coefficient thermistor, resistors, and capacitors. The NTC temperature sensor is mounted on the core area of ​​the controller PCB board near the MCU and power devices. A resistor divider circuit converts temperature changes into a voltage signal, and the capacitor is used for filtering to eliminate signal fluctuations. Functionally, this circuit monitors the operating temperature of the PCB board in real time, converting the temperature signal into an analog electrical signal and transmitting it to the MCU. When the temperature is too high, such as due to continuous high load causing overheating, or too low, such as in a low-temperature environment, the MCU activates over-temperature protection or under-temperature compensation mechanisms to ensure stable operation of the controller under extreme temperatures and extend device lifespan.

[0046] In one embodiment, refer to Figure 10 As can be seen, the voltage detection module circuit mainly consists of a Zener diode, resistors, and capacitors. The Zener diode is connected in parallel to the 12V power input terminal to limit voltage spikes, the resistors form a voltage divider network to sample the input voltage, and the capacitors are used to filter out voltage fluctuation noise. Functionally, this circuit monitors the input voltage of the 12V vehicle power supply in real time, converts the voltage signal into an analog signal that the MCU can recognize, and transmits it to the MCU. When overvoltage is detected, such as transient high voltage or undervoltage, such as when the battery is low on power, the MCU triggers protection measures, such as cutting off non-critical circuits or issuing an alarm, to prevent abnormal voltage from damaging the precision components in the control unit, such as the MCU and communication chips, and to improve the power adaptability of the controller.

[0047] In one embodiment, refer to Figure 11As can be seen, the hard-wired signal circuit consists of several identical hard-wired interface circuits. Each circuit mainly includes components such as Zener diodes, resistors, and capacitors. Structurally, the input terminal of the hard-wired interface circuit is connected to the vehicle body hard-wired signal terminal, such as door opening / closing signals and manual control signals, via wires. The input terminal is connected in series with a current-limiting resistor and then in parallel with a Zener diode grounded to limit the input voltage amplitude and prevent overvoltage damage. The resistor and capacitor form an RC filter network connected in parallel between the signal line and ground to filter out electromagnetic interference noise in the vehicle body hard-wired transmission. The circuit output terminal is connected to the digital signal input terminal of the MCU module via wires to realize the level conversion and stable transmission of the vehicle body hard-wired signal. As the interaction interface between the controller and the vehicle body hard-wired signal, this circuit can receive discrete signals from the vehicle body side, such as door status and disable commands. After voltage regulation, current limiting, and filtering, it transmits clean digital signals to the MCU, ensuring reliable reception of the vehicle body hard-wired signal in complex vehicle electromagnetic environments. At the same time, it is compatible with traditional models that do not support CAN or LIN communication, complementing the communication module and enhancing the platform versatility of the controller.

[0048] Working principle: The 5V LDO module of the power supply unit converts the 12V vehicle power supply into a stable 5V voltage to power the MCU module of the control unit and various detection circuits. At the same time, the voltage detection module monitors the 12V input voltage in real time and feeds it back to the MCU. The control unit is centrally located. The MCU, as the core, receives commands transmitted by the vehicle body through the CAN communication module, LIN communication module, or hard-wired signal processing module. It also monitors the temperature of the core area of ​​the PCB board through the temperature detection module and monitors the current of the motor drive bus through the current sampling circuit. In the motor drive unit, the MCU outputs a PWM signal, which is amplified by the MOSFET drive circuit and controls the conduction combination of the MOSFETs in the H-bridge motor drive module. At the same time, the Hall signal detection module feeds back the motor speed. The MCU dynamically adjusts the PWM duty cycle to achieve precise speed control, and finally drives the electric pedal motor to complete the extension / retraction action, and triggers protection in case of abnormality.

[0049] To address the issue of limited communication functionality, CAN, LIN, and hard-wired signal processing modules are integrated to enable multi-communication interaction and adapt to various vehicle platforms.

[0050] To address the lack of protection features, a 12V input voltage monitoring module, a current monitoring module for the motor bus, and a temperature monitoring module for the core area of ​​the PCB are installed. In case of abnormalities, the MCU triggers overvoltage, undervoltage, overcurrent, overload, and overtemperature protection to improve safety.

[0051] To address the issue of low motor control precision, an H-bridge drive module composed of MOSFETs is used in conjunction with Hall speed feedback to replace traditional relays, thereby achieving stepless speed regulation and soft start or braking, and reducing mechanical wear.

[0052] To address the issue of short device lifespan, the lifespan of devices is extended through the non-mechanical wear characteristics of MOSFETs, heat dissipation pad design, and protection mechanisms. At the same time, the platform-based design reduces R&D costs, and the control algorithm is simple and reliable, solving the problems of incomplete functionality, poor safety, and low adaptability of existing controllers.

[0053] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solution of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A LIN and CAN communication H-bridge electric pedal controller, characterized in that, It includes a control unit, a power supply unit, and a motor drive unit; the power supply unit is electrically connected to the control unit and provides power; the control unit includes an MCU module, a CAN communication module, a LIN communication module, and a hard-wired signal processing module, the CAN communication module, LIN communication module, and hard-wired signal processing module being electrically connected to the MCU module respectively; the motor drive unit includes a MOSFET drive module and an H-bridge motor drive module, the MCU module being electrically connected to the MOSFET drive module, the MOSFET drive module being electrically connected to the H-bridge motor drive module, and the H-bridge motor drive module being used to connect an external electric pedal motor.

2. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The power supply unit includes a 5V LDO module, the input of which is electrically connected to a 12V power supply, and the output of which is electrically connected to an MCU module.

3. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The control unit also includes a voltage detection module, the input of which is electrically connected to a 12V power supply, and the output of which is electrically connected to the MCU module.

4. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The control unit also includes a current detection module, the input of which is electrically connected to the bus of the H-bridge motor drive module, and the output of which is electrically connected to the MCU module.

5. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The control unit also includes a temperature detection module, the detection end of which is located on the PCB board and the output end is electrically connected to the MCU module.

6. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The motor drive unit also includes a Hall signal detection module. The input terminal of the Hall signal detection module is used to connect to the Hall sensor of the external electric pedal motor, and the output terminal is electrically connected to the MCU module.

7. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The H-bridge motor drive module includes at least two MOSFETs. The gate of each MOSFET is electrically connected to the output terminal of the MOSFET drive module, and the drain and source are electrically connected to the two ends of an external electric pedal motor, respectively.

8. The LIN and CAN communication H-bridge electric pedal controller according to claim 1, characterized in that, The hard-wire signal processing module includes at least one set of hard-wire interface circuits. The input terminal of the hard-wire interface circuit is used to connect to the hard-wire signal of the vehicle body, and the output terminal is electrically connected to the MCU module.

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