Wireless direct-current brushless motor automobile electric seat control system and method and medium

Abstract

The invention relates to the technical field of automobile electric seat control, and discloses a wireless direct-current brushless motor automobile electric seat control system and method and a medium, and the wireless direct-current brushless motor automobile electric seat control system comprises a seat assembly. The seat assembly comprises a wireless seat ECU, a wireless direct-current brushless motor unit, a wireless execution unit and a wireless key unit, the wireless direct-current brushless motor unit comprises at least one wireless direct-current brushless motor used for driving the seat assembly to be adjusted, and the control unit comprises a vehicle machine central control unit / cabin domain control unit ZCU and a touch display screen. The control unit is in wireless communication with the wireless seat ECU. Through the wireless seat ECU, the wireless direct-current brushless motor unit, the wireless execution unit and the wireless key unit which are integrated in the seat assembly, the seat ECU communicates with other vehicle-mounted ECUs in a wireless mode, the user experience is improved, installation and maintenance are convenient, and safety and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of automotive electric seat control technology, specifically to a wireless DC brushless motor automotive electric seat control system, method, and medium. Background Technology

[0002] With the development of automotive electronics technology and the continuous improvement of market demand, electric car seats have gradually become a basic configuration of modern cars. Whether it is the fore-and-aft movement and height adjustment of ordinary electric car seats, or the multi-directional adjustment of high-end electric car seats, such as the separate lifting and lowering of the front or rear of the seat, and the adjustment of the backrest, leg support, and headrest tilt, permanent magnet bidirectional DC brushed motors are now widely used as the power source. Combined with mechanical structures such as worm gear screws, gears, and four-bar linkages, functions such as fore-and-aft sliding, lifting and lowering, and backrest angle adjustment are realized respectively.

[0003] Traditional seat ECU and motor control requires current reversal to control the motor's rotation direction. The seat ECU is controlled by operating a control switch to change the direction of the current output by the seat ECU, thereby realizing the forward and reverse rotation of the motor and driving the seat to adjust in different directions. The seat ECU and motor need to be connected by a bidirectional current harness, and the internal wiring of the seat is complex. The seat ECU uses CAN / LIN bus to communicate with other vehicle ECUs, which increases the difficulty of vehicle assembly. At the same time, the assembly of a large number of wiring harnesses increases the later maintenance costs and reduces the system reliability. Summary of the Invention

[0004] This invention provides a wireless DC brushless motor automotive electric seat control system, method, and medium, which has the advantages of good user experience, simple installation and maintenance, and safety and reliability.

[0005] This invention provides the following technical solution: a wireless DC brushless motor automotive electric seat control system, comprising:

[0006] A seat assembly, comprising a wireless seat ECU, a wireless brushless DC motor unit, a wireless actuator unit, and a wireless button unit;

[0007] The wireless brushless DC motor unit includes at least one wireless brushless DC motor for driving seat assembly adjustment;

[0008] The control unit includes the vehicle infotainment system / cockpit domain control unit (ZCU) and a touch screen display.

[0009] The control unit communicates wirelessly with the wireless seat ECU, and the wireless seat ECU receives and parses the instructions issued by the control unit;

[0010] The wireless seat ECU communicates wirelessly with the wireless actuator, and the wireless actuator receives and feeds back the status data of the wireless seat ECU;

[0011] The wireless seat ECU communicates wirelessly with the wireless brushless DC motor unit, and the wireless brushless DC motor unit executes the commands issued by the wireless seat ECU.

[0012] As an optional solution of the wireless brushless DC motor automotive electric seat control system of the present invention, wherein: the wireless brushless DC motor is further provided with a wireless control module, a power drive module, and a mechanical transmission component;

[0013] The wireless control module and power drive module are installed inside the wireless brushless DC motor.

[0014] The power drive module is used to control the operation of the wireless brushless DC motor, and to detect the speed loop, current loop and position loop of the wireless brushless DC motor, and feed the signals back to the wireless control module to realize closed-loop control of the brushless DC motor.

[0015] As an optional solution of the wireless brushless DC motor automotive electric seat control system of the present invention, the wireless control module is used to receive wireless control commands from the wireless seat ECU, and parse the commands to control the power drive module to control the wireless brushless DC motor to execute the wireless control commands.

[0016] As an optional solution of the wireless brushless DC motor automotive electric seat control system of the present invention, the wireless control module is used to feed back the operating position and status information of the wireless brushless DC motor to the wireless seat ECU.

[0017] The wireless control module and the power drive module communicate via a connector.

[0018] As an optional solution to the wireless brushless DC motor automotive electric seat control system of the present invention, the wireless execution unit further includes a wireless ventilation execution unit, a wireless heating execution unit, a wireless massage execution unit, and a wireless audio headrest unit;

[0019] The wireless seat ECU communicates wirelessly with the wireless ventilation actuator, wireless heating actuator, wireless massage actuator, and wireless audio headrest unit, respectively.

[0020] As an optional solution of the wireless brushless DC motor automotive electric seat control system of the present invention, wherein: the wireless button unit includes at least one wireless button, and the wireless seat ECU communicates wirelessly with the wireless button.

[0021] This invention also provides a method for controlling a wireless brushless DC motor-driven automotive electric seat, comprising:

[0022] The control unit receives and sends user operation commands to the wireless seat ECU;

[0023] The wireless seat ECU analyzes user operation commands to determine the object controlled by the operation commands;

[0024] When the control object of the operation command is the wireless DC brushless motor unit, the wireless seat ECU will send the parsed motor control command to the wireless DC brushless motor.

[0025] The wireless control module of the wireless brushless DC motor receives motor control commands and drives the wireless brushless DC motor to perform motion through the power drive module.

[0026] When the object controlled by the operation command is the wireless execution unit, the wireless seat ECU sends the user operation command to the wireless execution unit;

[0027] The wireless actuator executes the operation commands and sends its own status data to the wireless seat ECU.

[0028] As an optional solution to the wireless DC brushless motor automotive electric seat control method of the present invention, i is achieved through PID closed-loop control. d =Vector control method performs three closed-loop control on the position and speed of the wireless brushless DC motor, thereby optimizing the operating accuracy of the wireless brushless DC motor.

[0029] As an optional solution of the wireless brushless DC motor automotive electric seat control method of the present invention, wherein: both the wireless brushless DC motor and the wireless execution unit send their own operating status data to the wireless seat ECU;

[0030] The wireless seat ECU sends the received status data of the wireless brushless DC motor and the wireless actuator to the control unit;

[0031] The control unit displays the real-time status of the wireless brushless DC motor and the wireless actuator.

[0032] The present invention also provides a medium for storing a method for controlling a wireless brushless DC motor-driven electric seat in an automotive vehicle, wherein the computer program, when executed, implements the steps of the method for controlling a wireless brushless DC motor-driven electric seat in an automotive vehicle as described in any of the preceding claims.

[0033] The present invention has the following beneficial effects:

[0034] 1. The wireless brushless DC motor automotive electric seat control system, method, and medium, through the integration of a wireless seat ECU, a wireless brushless DC motor unit, a wireless actuator unit, and a wireless button unit in the seat assembly, enables the seat ECU to communicate wirelessly with other vehicle ECUs, thereby improving user experience, facilitating installation and maintenance, and increasing safety and reliability.

[0035] 2. The wireless DC brushless motor automotive electric seat control system, method, and medium achieve i through PID closed-loop control. d =0 vector control mode performs three closed-loop control on the position and speed of wireless brushless DC motor, thereby optimizing the running accuracy of wireless brushless DC motor. Attached Figure Description

[0036] Figure 1 This is an architecture diagram of the wireless DC brushless motor automotive electric seat control system of the present invention.

[0037] Figure 2 This is a schematic diagram of the structure of the wireless brushless DC motor of the present invention.

[0038] Figure 3 This is a flowchart of the data processing of the wireless DC brushless motor seat control system of the present invention.

[0039] Figure 4 This is a flowchart of the wireless DC brushless motor three-closed-loop control seat adjustment control of the present invention.

[0040] Figure 5 This is the core circuit diagram of the wireless seat ECU of the present invention.

[0041] Figure 6 This is the main control circuit diagram of the wireless brushless DC motor of the present invention.

[0042] Figure 7 This is a circuit diagram of the wireless communication platform of the present invention.

[0043] Figure 8 This is a circuit diagram of the wireless brushless DC motor bus voltage sampling circuit of the present invention.

[0044] Figure 9 This is a circuit diagram of the wireless brushless DC motor current sampling circuit of the present invention.

[0045] Figure 10 This is a circuit diagram of the wireless brushless DC motor temperature sampling circuit of the present invention.

[0046] Figure 11 This is a circuit diagram of the wireless brushless DC motor bootstrap circuit of the present invention.

[0047] In the diagram: 01, Seat assembly; 02, Vehicle infotainment system / cockpit control unit (ZCU); 03, Touchscreen display; 011, Wireless seat ECU; 012, Wireless DC brushless motor unit; 013, Wireless actuator unit; 014, Wireless button unit; 0121, Wireless control module; 0122, Power drive module; 0123, Wireless DC brushless motor. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1

[0050] Please see Figures 1-11 One type of wireless DC brushless motor automotive electric seat control system includes:

[0051] Seat assembly 01 includes a wireless seat ECU 011, a wireless DC brushless motor unit 012, a wireless actuator unit 013, and a wireless button unit 014.

[0052] The wireless brushless DC motor unit 012 includes at least one wireless brushless DC motor 0123 for driving the adjustment of the seat assembly 01. The wireless brushless DC motor 0123 is used to control the position or angle of the seat slide rail, lifting, backrest, leg rest, and headrest.

[0053] The control unit includes the vehicle infotainment system / cockpit domain control ZCU02 and the touch screen display 03;

[0054] The control unit communicates wirelessly with the wireless seat ECU011, and the wireless seat ECU011 receives and interprets the commands issued by the control unit;

[0055] The wireless seat ECU011 communicates wirelessly with the wireless actuator 013, and the wireless actuator 013 receives and feeds back the status data of the wireless seat ECU011.

[0056] The wireless seat ECU011 communicates wirelessly with the wireless brushless DC motor unit 012, and the wireless brushless DC motor unit 012 executes the commands issued by the wireless seat ECU011.

[0057] The wireless brushless DC motor 012 also includes a wireless control module 0121, a power drive module 0122, and a mechanical transmission component 0124.

[0058] The wireless control module 0121 and the power drive module 0122 are installed inside the wireless DC brushless motor 0123;

[0059] The power drive module 0122 is used to control the operation of the wireless brushless DC motor 0123, and to detect the speed loop, current loop and position loop of the wireless brushless DC motor 0123, and feed the signals back to the wireless control module 0121 to realize closed-loop control of the brushless DC motor.

[0060] The wireless control module 0121 is used to receive wireless control commands from the wireless seat ECU 011 and parse the commands to control the power drive module 0122 to control the wireless DC brushless motor 0123 to execute the wireless control commands.

[0061] The wireless control module 0121 is used to feed back the position and status information of the wireless brushless DC motor 0123 to the wireless seat ECU 011;

[0062] The wireless control module 0121 and the power drive module 0122 communicate via a connector.

[0063] Among them, the power drive module 0122 drives the wireless brushless DC motor to run and detects the speed loop, current loop and position loop of the wireless brushless DC motor 0123, and feeds the signals back to the wireless control module 0121 to realize the closed-loop control of the brushless DC motor.

[0064] It should be noted that the wireless brushless DC motor 0123 uses a 48V system brushless DC motor to drive the mechanical transmission component 0124 to move, thereby controlling the electric car seat to perform its actions.

[0065] The wireless actuator 013 also includes a wireless ventilation actuator, a wireless heating actuator, a wireless massage actuator, and a wireless audio headrest unit;

[0066] The wireless seat ECU011 communicates wirelessly with the wireless ventilation actuator, wireless heating actuator, wireless massage actuator, and wireless audio headrest unit.

[0067] The wireless button unit 014 includes at least one wireless button, and the wireless seat ECU 011 communicates wirelessly with the wireless button.

[0068] Preferably, the touch screen 03 supports wireless functionality. The wireless seat ECU 011 of the seat assembly 01 communicates wirelessly with the touch screen 03. The touch screen 03 can adjust the seat status by touching the simulated buttons. The touch screen wirelessly transmits the seat adjustment information to the wireless seat ECU 011. The wireless seat ECU 011 sends the parsed control commands to the wireless DC brushless motor 012 or the wireless actuator 013 according to the control commands of the touch screen 03. The wireless seat ECU 011 then feeds back the seat status to the touch screen 03.

[0069] A method for controlling a wireless brushless DC motor-driven electric car seat includes:

[0070] The control unit receives and sends user operation commands to the wireless seat ECU011;

[0071] The wireless seat ECU011 parses user operation commands to determine the object controlled by the operation commands;

[0072] When the operation command controls the wireless DC brushless motor unit 012, the wireless seat ECU 011 sends the parsed motor control command to the wireless DC brushless motor 012.

[0073] The wireless control module 0121 of the wireless brushless DC motor 012 receives motor control commands and drives the wireless brushless DC motor 0123 to perform motion through the power drive module 0122.

[0074] When the operation command controls the wireless execution unit 013, the wireless seat ECU 011 sends the user operation command to the wireless execution unit 013;

[0075] The wireless actuator 013 executes the operation command and sends its own status data to the wireless seat ECU 011.

[0076] i is achieved through PID closed-loop control. d =0 vector control mode performs three closed-loop control on the position and speed of wireless brushless DC motor 0123, thereby optimizing the running accuracy of wireless brushless DC motor 0123.

[0077] Both the wireless brushless DC motor 0123 and the wireless actuator 013 send their own operating status data to the wireless seat ECU 011;

[0078] The wireless seat ECU011 sends the received status data of the wireless brushless DC motor 0123 and the wireless actuator 013 to the control unit.

[0079] The control unit displays the real-time status of the wireless brushless DC motor 0123 and the wireless actuator 013.

[0080] The mathematical model of the wireless brushless DC motor 012 in a rotating coordinate system can be obtained from the model in a two-phase stationary coordinate system through Park transformation:

[0081]

[0082] In the formula, ωs is the rotational speed of the rotating coordinate system, ωr is the rotational speed of the rotor, and ∆θ is the angle between the synchronous rotating coordinate system and the rotor's direct axis. When the rotational speed of the dq axis is the same as the rotational speed of the rotor (ωs=ωr), the voltage loop equation of the permanent magnet synchronous motor in the synchronous rotating coordinate system can be obtained:

[0083]

[0084] The mechanical motion equation of the wireless brushless DC motor is:

[0085]

[0086] In the formula, Electric angular velocity, For the electromagnetic torque of the motor, Let J be the motor load torque, J be the moment of inertia, and B be the damping coefficient. Since... Since the rotor excitation flux linkage is constant, p = 0, combining equations (1-01) and (1-02), we get:

[0087]

[0088] The state equation of the wireless brushless DC motor is:

[0089]

[0090] The control block diagram of the wireless DC brushless motor three-closed-loop control seat adjustment is as follows: Figure 5 As shown, a three-loop control method (id=0 vector control) is used to achieve three-loop control of the motor's position and speed, including a position loop, a speed loop, and a current loop. The current position of the controlled seat frame motor is detected and compared with a given position value. The given motor speed is obtained through a position regulator. The motor speed is calculated from the detected position value. The two speed values ​​are compared and then processed by a speed regulator to obtain the speed. q Given i q Given value and i q After comparing the detected values, via i q The regulator controls the controlled object, i d After comparing the detected value with 0, it is processed by i d The regulator adjusts and controls the controlled object to achieve current control with id=0.

[0091] It should be noted that the wireless seat ECU uses the FR3066 from FRIKEN as the main controller. The FR3066 integrates RF, Baseband, PMU and other modules, has 1MB of flash memory, and supports Bluetooth V5.3BR / EDR / LE protocols. The circuit is as follows: Figure 5 As shown.

[0092] The wireless brushless DC motor uses Lingou Innovation's LKS32AT089 as the main controller, and the wireless communication uses the Furuikun FR8016HA platform. The circuit is as follows: Figure 6 As shown.

[0093] The LKS32AT089's ADC channel 2 input function is used for bus voltage sampling. The hardware sampling circuit is as follows: Figure 7 As shown:

[0094]

[0095] The FOC module automatically acquires the motor's bus voltage and three-phase current through hardware. The current sampling circuit is as follows: Figure 8 As shown. Before the FOC module starts working, enable the ADC and op-amp, and configure the relevant sampling control registers. The ADC channel and scan mode do not need to be configured. Select the single / dual / triple resistor current sampling mode according to FOC_CR1[CSM]. In single resistor current sampling mode, ADC channel 4 is the default sampling channel for the bus current itrip. The project uses single resistor current sampling mode. The circuit is as follows. Figure 8 As shown.

[0096] The sampling resistor is Yageo PA2512FKF7W0R005E, an automotive-grade current sensing resistor in a 2512 package, with a resistance of 5m Ohms, an accuracy of ±1%, and a power rating of 2W.

[0097] Temperature sampling circuit such as Figure 9 The temperature acquisition NTC_MOS signal is connected to a thermistor. A Shunluo multilayer chip NTC thermistor is selected, model ASDNT1608G103F3380FTF, 0603 package, 10K±1%, B value 3380K±1%. The upper voltage divider resistor FR1 is 10K / 1% by default.

[0098] Bootstrap circuits, such as Figure 10As shown, for the lower MOSFET, since its source (S) is grounded, a gate voltage of 48V is sufficient for it to conduct. For the upper MOSFET, if a gate voltage of 48V is applied to G, the power supply VBAT will be applied to V after the upper MOSFET turns on. At this time, VGS = 48 - V (48V) = 0V, and the MOSFET will turn off. In other words, the upper MOSFET turns off the instant it turns on. Therefore, driving the upper MOSFET with 48V is not feasible. A bootstrap voltage boost circuit is needed to prevent the upper MOSFET from turning off due to the increased source voltage (S) after it turns on. This requires the gate voltage (G) to always be 48V higher than the source voltage (S) to ensure the upper MOSFET can continue to conduct.

[0099] A computer-readable storage medium storing a computer program that, when executed, implements a method for controlling an electric car seat using a wireless brushless DC motor.

[0100] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0101] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wireless DC brushless motor automotive electric seat control system, characterized in that, include: The seat assembly (01) includes a wireless seat ECU (011), a wireless DC brushless motor unit (012), a wireless actuator unit (013), and a wireless button unit (014). The wireless brushless DC motor unit (012) includes at least one wireless brushless DC motor (0123) for driving the adjustment of the seat assembly (01). The control unit includes the vehicle infotainment system / cockpit domain control ZCU (02) and the touch screen (03). The control unit communicates wirelessly with the wireless seat ECU (011), and the wireless seat ECU (011) receives and parses the instructions issued by the control unit; The wireless seat ECU (011) communicates wirelessly with the wireless execution unit (013), and the wireless execution unit (013) receives and feeds back the status data of the wireless seat ECU (011); The wireless seat ECU (011) communicates wirelessly with the wireless brushless DC motor unit (012), and the wireless brushless DC motor unit (012) executes the commands issued by the wireless seat ECU (011).

2. The wireless DC brushless motor automotive electric seat control system according to claim 1, characterized in that: The wireless brushless DC motor (012) is also equipped with a wireless control module (0121), a power drive module (0122), and a mechanical transmission component (0124). The wireless control module (0121) and the power drive module (0122) are installed inside the wireless brushless DC motor (0123); The power drive module (0122) is used to control the operation of the wireless brushless DC motor (0123) and detect the speed loop, current loop and position loop of the wireless brushless DC motor (0123), and feed the signals back to the wireless control module (0121) to realize the closed-loop control of the brushless DC motor.

3. The wireless DC brushless motor automotive electric seat control system according to claim 2, characterized in that: The wireless control module (0121) is used to receive wireless control commands from the wireless seat ECU (011) and parse the commands to control the power drive module (0122) to control the wireless DC brushless motor (0123) to execute the wireless control commands.

4. The wireless DC brushless motor automotive electric seat control system according to claim 2, characterized in that: The wireless control module (0121) is used to feed back the position and status information of the wireless brushless DC motor (0123) to the wireless seat ECU (011). The wireless control module (0121) and the power drive module (0122) communicate via a connector.

5. The wireless DC brushless motor automotive electric seat control system according to claim 1, characterized in that: The wireless actuator (013) also includes a wireless ventilation actuator, a wireless heating actuator, a wireless massage actuator, and a wireless audio headrest unit; The wireless seat ECU (011) communicates wirelessly with the wireless ventilation actuator, wireless heating actuator, wireless massage actuator, and wireless audio headrest unit, respectively.

6. The wireless DC brushless motor automotive electric seat control system according to claim 1, characterized in that: The wireless button unit (014) includes at least one wireless button, and the wireless seat ECU (011) communicates wirelessly with the wireless button.

7. A method for controlling a wireless brushless DC motor-driven automotive electric seat, characterized in that, include: The control unit receives and sends user operation commands to the wireless seat ECU (011). The wireless seat ECU (011) parses the user's operation command to determine the object controlled by the operation command. When the operation command controls the wireless brushless DC motor unit (012), the wireless seat ECU (011) sends the parsed motor control command to the wireless brushless DC motor (012). The wireless control module (0121) of the wireless brushless DC motor (012) receives motor control commands and drives the wireless brushless DC motor (0123) to perform motion through the power drive module (0122); When the operation command controls the wireless execution unit (013), the wireless seat ECU (011) sends the user operation command to the wireless execution unit (013). The wireless actuator (013) executes the operation command and sends its own status data to the wireless seat ECU (011).

8. The wireless brushless DC motor automotive electric seat control method according to claim 7, characterized in that: i is achieved through PID closed-loop control. d =0 vector control mode performs three closed-loop control on the position and speed of the wireless brushless DC motor (0123) to optimize the running accuracy of the wireless brushless DC motor (0123).

9. The wireless brushless DC motor automotive electric seat control method according to claim 7, characterized in that: Both the wireless brushless DC motor (0123) and the wireless actuator (013) send their own operating status data to the wireless seat ECU (011). The wireless seat ECU (011) sends the received status data of the wireless brushless DC motor (0123) and the wireless actuator (013) to the control unit; The control unit displays the real-time status of the wireless brushless DC motor (0123) and the wireless actuator (013).

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the steps of the wireless brushless DC motor automotive electric seat control method as described in any one of claims 7-9.

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