Power window control system with anti-pinch function

Abstract

The utility model relates to the technical field of automobiles, in particular to a power window control system with an anti-pinch function, which comprises a 12V power supply module, an MCU (Microprogrammed Control Unit) module, a temperature module, a motor driving module, a motor and a motor current detection module, the 12V power supply module outputs 12V voltage to the motor driving module and outputs 5V voltage to the MCU module for providing voltage required by operation for the power window control system, and the MCU module is a core control unit of the power window control system; according to the power window control system with the anti-pinch function, by arranging a circuit control structure of the 12V power supply module, the MCU module, the temperature module, the motor driving module and the motor current detection module, the functions of providing stable power supply voltage, efficient control logic of the MCU and real-time data processing are achieved; and the reliability, the stability, the response speed and the control precision of the power window control system are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, specifically to an electric window control system with anti-pinch function. Background Technology

[0002] Electric window control systems have become a standard feature in modern cars, greatly improving vehicle convenience and safety. However, with technological advancements and increasing demands for vehicle safety and comfort, traditional electric window control systems have also revealed some shortcomings and deficiencies.

[0003] For example, traditional automotive power window control often relies on numerous mechanical components and complex electrical circuits, resulting in a complex system structure. This not only increases the difficulty of production and assembly, but also raises the challenges of maintenance and troubleshooting. Furthermore, the complex circuitry leads to higher costs and a higher failure rate. Power windows often lack effective anti-pinch functionality. If an obstruction, such as a passenger's hand or head, is encountered during window closing, the system may fail to detect and stop the window in time, potentially causing serious safety accidents. Some systems lack soft-start functionality, and directly starting the window motor may shorten its lifespan. Additionally, the absence of overcurrent protection can lead to motor overheating or damage under overload conditions, potentially causing electrical faults or fires.

[0004] Therefore, there is an urgent need to develop an electric window control system with anti-pinch function, soft start function and overcurrent protection function to simplify the circuit structure, improve safety, enhance reliability and improve user experience. Summary of the Invention

[0005] The purpose of this utility model is to provide an electric window control system with anti-pinch function to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model discloses an electric window control system with anti-pinch function, including a 12V power supply module, an MCU module, a temperature module, a motor drive module, a motor, and a motor current detection module.

[0007] The 12V power supply module outputs 12V voltage to the motor drive module and 5V voltage to the MCU module to provide the voltage required for the operation of the electric window control system.

[0008] The MCU module is the core control unit of the electric window control system. It receives the temperature signal from the temperature module, the current signal from the motor current detection module, and outputs a PWM control signal to the motor drive module to realize the speed and direction control of the motor, and handle the anti-pinch function and temperature protection function.

[0009] The temperature module monitors the temperature of the motor drive module and the motor in real time and transmits the temperature signal to the MCU module. Specifically, the temperature is detected by an NTC thermistor and the temperature signal is transmitted to the MCU module. The MCU module then determines the working status of the motor and the motor drive module drive circuit based on the temperature for overheat protection.

[0010] The motor drive module receives PWM signals from the MCU module to control the direction and speed of the motor. Specifically, it uses an H-bridge circuit composed of four MOS transistors to realize the forward rotation, reverse rotation and stop of the motor, which is used to drive the motor to raise and lower the car window glass, thereby realizing the soft start function of the electric window control.

[0011] The motor receives the drive command from the motor drive module and uses a gear mechanism to control the rotation of the gears to drive the up and down movement of the window glass, thereby driving the lifting function of the window glass.

[0012] The motor current detection module monitors the motor current and transmits the current signal to the MCU module. Specifically, it detects the current by connecting a sampling resistor and an operational amplifier in series on the motor bus and transmits the current signal to the MCU module. The MCU module then determines the motor's operating conditions, such as jamming or stalling, based on the current changes.

[0013] Optionally, the 12V power supply module includes a BAT+ terminal and a BAT- terminal for the 12V power supply input of the passenger vehicle, a TVS diode protection circuit, a filter circuit, and an LDO step-down circuit. The TVS diode protection circuit includes a TVS diode D518, and the two ends of the TVS diode D518 are respectively connected to the BAT+ terminal and the BAT- terminal. The TVS diode D518 is used to protect the circuit from transient voltage surges and prevent voltage spikes from damaging the circuit.

[0014] The filter circuit includes inductor L500, capacitors C519, C520, C515, C518, C504, C516, C510, C511, C517, C512, C513, C1, C2, C3, and C4. Capacitors C519 and C520 are connected in series, and capacitors C515 and C518 are connected in series. This circuit is used to filter out noise from the power supply. To eliminate high-frequency noise and provide a stable voltage input, capacitors C504, C516, C510, C511, C517, C512, and C513 are connected in parallel to the BAT+ and BAT- terminals. The filter circuit also includes the motor drive module power supply terminal and the negative terminal BAT_ of the vehicle power interface, which are connected to the two ends of capacitor C517 in a topology. This is used to filter out residual ripple and noise in the power supply and ensure a stable power supply.

[0015] The LDO step-down circuit includes an LDO step-down converter U1, which is used to step down the 12V voltage to 5V, providing a smooth voltage and preventing output voltage fluctuations. The LDO step-down converter U1 has four pins: pin 1 (input voltage VCC), pin 2 (GND), pin 3 (output voltage VOUT), and pin 4 (GND). Capacitors C3 and C4 are connected in parallel between pin 1 (input voltage VCC) and pin 2 (GND). Capacitors C1 and C2 are connected in parallel between pin 3 (output voltage VOUT) and pin 4 (GND). The negative terminal BAT_ of the vehicle power interface is connected between pin 4 (GND) and pin 2 (GND), and between pin 4 (GND) and capacitor C1. The 5V MCU module power supply terminal is connected between pin 4 (GND) and capacitor C2.

[0016] Optionally, the temperature module includes an MCU_ADC sampling port 2, a capacitor C514, a vehicle power interface negative terminal BAT_, a resistor R529, a negative temperature coefficient thermistor NTC500, and a 5V input voltage terminal. The 5V input voltage terminal is connected in series with the resistor R529, the negative temperature coefficient thermistor NTC500, and the vehicle power interface negative terminal BAT_, located between the resistor R529 and the negative temperature coefficient thermistor NTC500, and is topologically connected to the MCU_ADC sampling port 2. The capacitor C514 is topologically connected in parallel between one end of the MCU_ADC sampling port 2 and one end of the vehicle power interface negative terminal BAT_. The temperature signal is sampled by the negative temperature coefficient thermistor NTC in ADC mode and transmitted to the MCU module for real-time monitoring and overheat protection. That is, the negative temperature coefficient thermistor NTC is used to monitor the temperature of the motor drive module drive circuit and the motor.

[0017] Optionally, the motor drive module includes an H-bridge composed of four MOSFETs, OUT1 and OUT2 terminals of the motor winding, a 12V motor drive module power supply terminal, a motor bus current sampling resistor, and the negative terminal of the power interface BAT_. The two sides of the OUT1 and OUT2 terminals of the motor winding are respectively connected in series with the H-bridge composed of the four MOSFETs. The H-bridge composed of the upper two MOSFETs is connected in series with the 12V motor drive module power supply terminal. The H-bridge composed of the lower two MOSFETs is connected in series with the motor bus current sampling resistor and the negative terminal of the power interface BAT_.

[0018] Optionally, the motor current detection module includes an MCU_ADC sampling port 1, a 5V input voltage terminal, five vehicle power interface negative terminals BAT_, capacitors C700, C701, C702, C703, and C704, an operational amplifier U700A, a motor bus current sampling resistor, and resistors R700, R701, R702, R703, R704, and R705. The MCU_ADC sampling port 1 is connected in series with resistor R702 and pin 1 of the operational amplifier U700A. The ADC sampling port 1 and the resistor R702 are connected in series with the capacitor C701 and the negative terminal BAT_ of the vehicle power interface. Pin 8 of the operational amplifier U700A is connected to the 5V input voltage terminal, and the 5V input voltage terminal is connected in series with the capacitor C703 and the negative terminal BAT_ of the vehicle power interface. Pin 4 of the operational amplifier U700A is connected to the negative terminal BAT_ of the vehicle power interface. Pin 3 of the operational amplifier U700A is connected in series with one end of the resistor R701. Pin 2 of the operational amplifier U700A... Pin 1 is connected in series with resistor R704, and the other end of resistor R704 is topologically connected between resistor R702 and pin 1 of operational amplifier U700A. Resistors R700, R703, and the negative terminal BAT_ of the vehicle power interface are topologically connected in series between pin 8 of operational amplifier U700A and the 5V input voltage terminal. The other end of resistor R701 is connected to one end of the motor bus current sampling resistor, and resistor R704 is topologically connected in series between pin 2 of operational amplifier U700A and resistor R704. 05 and the other end of the motor bus current sampling resistor are located between resistor R701 and the motor bus current sampling resistor and between resistor R705 and the motor bus current sampling resistor, and are connected in parallel to capacitor 702. One end of capacitor 702 is connected to the negative terminal BAT_ of the vehicle power interface. Capacitor C700 and capacitor C704 are connected in series and then connected in parallel with capacitor C702. They are located between capacitor C700 and capacitor C704 and between capacitor C703 and the negative terminal BAT_ of the vehicle power interface.

[0019] Optionally, the TVS diode D518 is of model SMBJ12A, used to protect the circuit from transient voltage surges. The capacitors C519, C520, C515, C518, C1, C2, C3, and C4 are ceramic capacitors with equal capacitance values ​​ranging from 0.1μF to 10μF, used to filter out high-frequency noise in the power supply. The LDO step-down converter U1 is of model LM7805, used to step down the 12V voltage to 5V and output it to the MCU module.

[0020] Optionally, resistor R529 and the negative temperature coefficient thermistor NTC500 together form a voltage divider circuit to convert temperature changes into voltage changes for ADC sampling. The operational amplifier U700A is an LM358 or OP07, used to amplify the voltage signal across the current sampling resistor. Resistors R700 and R703 have voltage dividing and current limiting functions to ensure that the input voltage of the operational amplifier is within a suitable range. Resistor R701 is used for current sampling, resistor R704 is used for feedback control to adjust the gain of the operational amplifier, and resistor R705 has current limiting and voltage dividing functions to ensure the stability of the current signal.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This electric window control system with anti-pinch function achieves stable power supply voltage, efficient MCU control logic, and real-time data processing by setting up a circuit control structure including a 12V power supply module, an MCU module, a temperature module, a motor drive module, and a motor current detection module. This improves the reliability, stability, response speed, and control accuracy of the electric window control system. The motor drive module drives the motor to rotate forward / reverse and start / stop based on the control signal from the MCU module, precisely controlling the window lifting and lowering, and realizing soft start, anti-pinch function, overcurrent and temperature protection functions, enhancing user experience and optimizing the circuit structure. Attached Figure Description

[0023] Figure 1 This is a block diagram of the electric window control system module with anti-pinch function of this utility model.

[0024] Figure 2 This is a schematic diagram of the circuit structure of the 12V power supply module of this utility model.

[0025] Figure 3 This is a schematic diagram of the circuit structure of the temperature module of this utility model.

[0026] Figure 4 This is a schematic diagram of the circuit structure of the motor drive module of this utility model.

[0027] Figure 5This is a schematic diagram of the circuit structure of the motor current detection module of this utility model.

[0028] The attached diagram is labeled as follows: 1. 12V power supply module; 2. MCU module; 3. Temperature module; 4. Motor drive module; 5. Motor; 6. Motor current detection module. Detailed Implementation

[0029] The technical solution of this utility model will be described in detail below through specific embodiments.

[0030] Reference Figure 1-5 As shown, this utility model discloses an electric window control system with anti-pinch function, including a 12V power supply module 1, an MCU module 2, a temperature module 3, a motor drive module 4, a motor 5, and a motor current detection module 6.

[0031] The 12V power supply module 1 outputs 12V voltage to the motor drive module 4 and 5V voltage to the MCU module 2 to provide the voltage required for the operation of the electric window control system.

[0032] MCU module 2 is the core control unit of the electric window control system. It receives the temperature signal from temperature module 3, the current signal from motor current detection module 6, and outputs PWM control signal to motor drive module 4 to realize motor speed regulation and direction control, and handle anti-pinch function and temperature protection function.

[0033] Temperature module 3 monitors the temperature of motor drive module 4 and motor 5 in real time and transmits the temperature signal to MCU module 2. Specifically, the temperature is detected by NTC thermistor and the temperature signal is transmitted to MCU module 2. MCU module 2 then determines the working status of the drive circuit of motor 5 and motor drive module 4 based on the temperature for overheat protection.

[0034] The motor drive module 4 receives the PWM signal from the MCU module 2 and controls the rotation direction and speed of the motor 5. Specifically, it uses an H-bridge circuit composed of 4 MOS transistors to realize the forward rotation, reverse rotation and stop of the motor, which is used to drive the motor 5 to realize the raising and lowering of the car window glass, thereby realizing the soft start function of the electric window control.

[0035] Motor 5 receives the drive command from motor drive module 4 and uses a gear mechanism to control the rotation of gears to drive the up and down movement of the car window glass, thereby driving the lifting and lowering function of the car window glass.

[0036] The motor current detection module 6 monitors the current of the motor 5 and transmits the current signal to the MCU module 2. Specifically, the current is detected by connecting a sampling resistor and an operational amplifier in series with the bus of the motor 5, and the current signal is transmitted to the MCU module 2. The MCU module 2 then judges the working conditions of the motor 5, such as jamming or stalling, based on the current change.

[0037] Preferably, the 12V power supply module 1 includes a BAT+ terminal and a BAT- terminal for the 12V power supply input of the passenger vehicle, a TVS diode protection circuit, a filter circuit, and an LDO step-down circuit. The TVS diode protection circuit includes a TVS diode D518, and the two ends of the TVS diode D518 are connected to the BAT+ terminal and the BAT- terminal respectively. The TVS diode D518 is used to protect the circuit from transient voltage impacts and prevent voltage spikes from damaging the circuit.

[0038] The filter circuit includes inductor L500, capacitors C519, C520, C515, C518, C504, C516, C510, C511, C517, C512, C513, C1, C2, C3, and C4. Capacitors C519 and C520 are connected in series, and capacitors C515 and C518 are also connected in series. This is used to filter out high-frequency noise in the power supply and provide a stable voltage input. Capacitors C504, C516, C510, C511, C517, C512, and C513 are all connected in parallel to the BAT+ and BAT- terminals. The filter circuit also includes a 12V motor drive module power supply terminal and the negative terminal BAT_ of the vehicle power interface, located across capacitor C517. This is used to filter out residual ripple and noise in the power supply and ensure a stable power supply.

[0039] The LDO step-down circuit includes an LDO step-down converter U1, which is used to step down the 12V voltage to 5V, providing a smooth voltage and preventing output voltage fluctuations. The LDO step-down converter U1 has four pins: pin 1 (input voltage VCC), pin 2 (GND), pin 3 (output voltage VOUT), and pin 4 (GND). Capacitors C3 and C4 are connected in parallel between pin 1 (input voltage VCC) and pin 2 (GND). Capacitors C1 and C2 are connected in parallel between pin 3 (output voltage VOUT) and pin 4 (GND). The negative terminal BAT_ of the vehicle power interface is connected between pin 4 (GND) and pin 2 (GND), and between pin 4 (GND) and capacitor C1. The 5V MCU module power supply terminal is connected between pin 4 (GND) and capacitor C2.

[0040] Preferably, the temperature module 3 includes an MCU_ADC sampling port 2, a capacitor C514, the negative terminal BAT_ of the vehicle power interface, a resistor R529, a negative temperature coefficient thermistor NTC500, and a 5V input voltage terminal. The 5V input voltage terminal is connected in series with the resistor R529, the negative temperature coefficient thermistor NTC500, and the negative terminal BAT_ of the vehicle power interface, and is located between the resistor R529 and the negative temperature coefficient thermistor NTC500. It is topologically connected to the MCU_ADC sampling port 2. The capacitor C514 is topologically connected in parallel between one end of the MCU_ADC sampling port 2 and one end of the negative terminal BAT_ of the vehicle power interface. The temperature signal is sampled by the negative temperature coefficient thermistor NTC in ADC mode and transmitted to the MCU module for real-time monitoring and overheat protection. That is, the negative temperature coefficient thermistor NTC is used to monitor the temperature of the drive circuit of the motor drive module 4 and the motor 5.

[0041] Preferably, the motor drive module 4 includes an H-bridge composed of four MOSFETs, OUT1 and OUT2 terminals of the motor winding, a 12V motor drive module power supply terminal, a motor bus current sampling resistor, and the negative terminal BAT_ of the power interface. The two sides of the OUT1 and OUT2 terminals of the motor winding are connected in series with the H-bridge composed of the four MOSFETs. The upper two MOSFETs of the H-bridge are connected in series with the 12V motor drive module power supply terminal. The lower two MOSFETs of the H-bridge are connected in series with the motor bus current sampling resistor and the negative terminal BAT_ of the power interface. The H-bridge composed of the four MOSFETs is used to realize the forward and reverse rotation and switching control of the motor 5, thereby controlling the direction and speed of the motor 5. The OUT1 and OUT2 terminals of the motor winding are interconnected with the two ends of the motor 5. By controlling the conduction state of the MOSFETs in the H-bridge, the voltage at the OUT1 and OUT2 terminals is changed, thereby controlling the direction and speed of the motor. The 12V motor drive module power supply terminal provides power to the motor drive module. The motor bus current sampling resistor measures the current passing through the motor 5 to monitor and control the motor's operation.

[0042] Preferably, the motor current detection module 6 includes an MCU_ADC sampling port 1, a 5V input voltage terminal, five vehicle power interface negative terminals BAT_, capacitors C700, C701, C702, C703, and C704, an operational amplifier U700A, a motor bus current sampling resistor, and resistors R700, R701, R702, R703, R704, and R705. The MCU_ADC sampling port 1 is connected in series with resistor R702 and pin 1 of the operational amplifier U700A, forming a topology between the MCU_ADC sampling port 1 and resistor R702. A capacitor C701 is connected in series with the negative terminal BAT_ of the vehicle power interface. Pin 8 of operational amplifier U700A is connected to the 5V input voltage terminal, and the 5V input voltage terminal is connected in series with capacitor C703 and the negative terminal BAT_ of the vehicle power interface. Pin 4 of operational amplifier U700A is connected to the negative terminal BAT_ of the vehicle power interface. Pin 3 of operational amplifier U700A is connected in series with one end of resistor R701. Pin 2 of operational amplifier U700A is connected in series with resistor R704, and the other end of resistor R704 is connected in a topological configuration between resistor R702 and pin 1 of operational amplifier U700A. A series topology connects resistors R700 and R703 to the negative terminal BAT_ of the vehicle power interface between pin 8 of operational amplifier U700A and the 5V input voltage terminal. The other end of resistor R701 is connected to one end of the motor bus current sampling resistor. A series topology connects resistor R705 to the other end of the motor bus current sampling resistor between pin 2 of operational amplifier U700A and resistor R704. A capacitor 702 is connected in parallel between resistors R701 and R705, with one end of capacitor 702 connected to the negative terminal B of the vehicle power interface. AT_, capacitors C700 and C704 are connected in series and then in parallel with capacitor C702. It is located between capacitors C700 and C704 and between capacitor C703 and the negative terminal BAT_ of the vehicle power interface. The MCU_ADC sampling port 1 is used to collect the analog voltage value of the motor 5 current signal and transmit it to the ADC built into the MCU module 2 for digital processing. The 5V input voltage terminal provides a stable 5V power supply voltage for the operational amplifier U700A component in the circuit. The operational amplifier U700A is used to amplify the voltage signal on the motor bus current sampling resistor to facilitate subsequent ADC sampling.

[0043] Preferably, the TVS diode D518 is of model SMBJ12A, used to protect the circuit from transient voltage surges. Capacitors C519, C520, C515, C518, C1, C2, C3, and C4 are ceramic capacitors with equal capacitance values ​​ranging from 0.1μF to 10μF, used to filter out high-frequency noise in the power supply. The LDO step-down converter U1 is of model LM7805, used to step down the 12V voltage to 5V and output it to the MCU module 2.

[0044] Preferably, resistor R529 and negative temperature coefficient thermistor NTC500 together form a voltage divider circuit to convert temperature changes into voltage changes for ADC sampling. Operational amplifier U700A is model LM358 or OP07, used to amplify the voltage signal across the current sampling resistor. Resistors R700 and R703 have voltage dividing and current limiting functions to ensure that the input voltage of the op-amp is within a suitable range. Resistor R701 is used for current sampling, resistor R704 is used for feedback control to adjust the gain of the op-amp, and resistor R705 has current limiting and voltage dividing functions to ensure the stability of the current signal.

[0045] Working principle: The 12V power supply module 1 provides a stable 12V power supply to the electric window control system. After the MCU module 2 is powered on, it initializes the I / O ports, ADC sampling, and PWM signals. The temperature module 3 monitors the temperature signals of the motor drive module 4 and the motor 5 in real time and transmits the temperature signals to the MCU module 2 for processing and control. The motor current detection module 6 monitors the current changes of the motor 5 and converts the collected analog signals into digital signals, which are then transmitted to the MCU module 2 for processing and control. For the soft start control of the electric window, the user sends a window raising / lowering command through the window switch. The MCU module 2 receives the command and generates a control signal to control the motor drive module 4 to drive the motor 5, thereby raising and lowering the window. The motor current detection module 6 monitors the motor current in real time and transmits the current signal to the MCU module 2. The MCU module 2 samples and processes the current signal and obtains the current data through the ADC.

[0046] For the anti-pinch function control of the electric window, the MCU module 2 monitors the current of the motor 5 collected by the motor current detection module 6 in real time. When the current rises rapidly and exceeds the set threshold, it is determined that a pinching situation may occur, and the motor 5 is stopped immediately. The motor drive module 4 is used to reverse drive the motor 5 to lower the window a certain distance to avoid injury. During the operation of the window, the temperature module 3 continuously monitors the temperature. When the temperature is too high, the MCU module 2 receives the temperature signal from the temperature module 3 and can adjust the running speed of the motor 5 or stop the operation to protect the system safety.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power window control system with anti-pinch function, characterized in that: It includes a 12V power supply module (1), an MCU module (2), a temperature module (3), a motor drive module (4), a motor (5), and a motor current detection module (6). The 12V power supply module (1) outputs 12V voltage to the motor drive module (4) and outputs 5V voltage to the MCU module (2). The MCU module (2) receives the temperature signal from the temperature module (3), the current signal from the motor current detection module (6), and outputs a PWM control signal to the motor drive module (4). The temperature module (3) monitors the temperature of the motor drive module (4) and the motor (5) in real time and transmits the temperature signal to the MCU module (2). The motor drive module (4) receives PWM signals from the MCU module (2) and controls the rotation direction and speed of the motor (5); The motor (5) receives the drive command from the motor drive module (4) and uses the gear mechanism to drive the window glass to move up and down by controlling the rotation of the gears. The motor current detection module (6) monitors the current of the motor (5) and transmits the current signal to the MCU module (2).

2. The electric window control system with anti-pinch function according to claim 1, characterized in that: The 12V power supply module (1) includes a BAT+ terminal and a BAT- terminal for the 12V power supply input of the passenger vehicle, a TVS diode protection circuit, a filter circuit and an LDO step-down circuit. The TVS diode protection circuit includes a TVS diode D518, and the two ends of the TVS diode D518 are respectively connected to the BAT+ terminal and the BAT- terminal. The filter circuit includes inductor L500, capacitors C519, C520, C515, C518, C504, C516, C510, C511, C517, C512, C513, C1, C2, C3, and C4. Capacitors C519 and C520 are connected in series, and capacitors C515 and C518 are connected in series. Capacitors C504, C516, C510, C511, C517, C512, and C513 are all connected in parallel to the BAT+ and BAT- terminals. The filter circuit also includes a 12V motor drive module power supply terminal and the negative terminal BAT_ of the vehicle power interface, both connected in a topology to the two ends of capacitor C517. The LDO step-down circuit includes an LDO step-down converter U1, which has four pins: pin 1 (input voltage VCC), pin 2 (GND), pin 3 (output voltage VOUT), and pin 4 (GND). Capacitors C3 and C4 are connected in parallel between pin 1 (input voltage VCC) and pin 2 (GND). Capacitors C1 and C2 are connected in parallel between pin 3 (output voltage VOUT) and pin 4 (GND). The negative terminal BAT_ of the vehicle power interface is connected between pin 4 (GND) and pin 2 (GND), and between pin 4 (GND) and capacitor C1. A 5V MCU module power supply is connected between pin 4 (GND) and capacitor C2.

3. A power window control system with anti-pinch function according to claim 2, characterized in that: The temperature module (3) includes an MCU_ADC sampling port 2, a capacitor C514, a vehicle power interface negative terminal BAT_, a resistor R529, a negative temperature coefficient thermistor NTC500, and a 5V input voltage terminal. The 5V input voltage terminal is connected in series with the resistor R529, the negative temperature coefficient thermistor NTC500, and the vehicle power interface negative terminal BAT_, and is located between the resistor R529 and the negative temperature coefficient thermistor NTC500. It is topologically connected to the MCU_ADC sampling port 2, and the capacitor C514 is topologically connected in parallel between one end of the MCU_ADC sampling port 2 and one end of the vehicle power interface negative terminal BAT_.

4. A power window control system with anti-pinch function according to claim 3, characterized in that: The motor drive module (4) includes an H-bridge composed of four MOS transistors, OUT1 and OUT2 terminals of the motor winding, a 12V motor drive module power supply terminal, a motor bus current sampling resistor, and the negative terminal of the power interface BAT_. The two sides of the OUT1 and OUT2 terminals of the motor winding are connected in series with the H-bridge composed of the four MOS transistors. The upper two H-bridges are connected in series with the 12V motor drive module power supply terminal. The lower two H-bridges are connected in series with the motor bus current sampling resistor and the negative terminal of the power interface BAT_.

5. A power window control system with anti-pinch function according to claim 4, characterized in that: The motor current detection module (6) includes an MCU_ADC sampling port 1, a 5V input voltage terminal, five vehicle power interface negative terminals BAT_, capacitors C700, C701, C702, C703, C704, an operational amplifier U700A, a motor bus current sampling resistor, resistors R700, R701, R702, R703, R704, and R705. The MCU_ADC sampling port 1 is connected in series with resistor R702 and pin 1 of the operational amplifier U700A. The capacitor C701 and the negative terminal BAT_ of the vehicle power interface are connected in series between the DC sampling port 1 and the resistor R702. Pin 8 of the operational amplifier U700A is connected to the 5V input voltage terminal, and the 5V input voltage terminal is connected in series with the capacitor C703 and the negative terminal BAT_ of the vehicle power interface. Pin 4 of the operational amplifier U700A is connected to the negative terminal BAT_ of the vehicle power interface. Pin 3 of the operational amplifier U700A is connected in series with one end of the resistor R701. Pin 2 of the operational amplifier U700A... The pin is connected in series with the resistor R704, and the other end of the resistor R704 is topologically connected between the resistor R702 and pin 1 of the operational amplifier U700A. The resistors R700, R703, and the negative terminal BAT_ of the vehicle power interface are topologically connected in series between pin 8 of the operational amplifier U700A and the 5V input voltage terminal. The other end of the resistor R701 is connected to one end of the motor bus current sampling resistor, and the resistor R704 is topologically connected in series between pin 2 of the operational amplifier U700A and the resistor R704. 05 and the other end of the motor bus current sampling resistor are located between resistor R701 and the motor bus current sampling resistor and between resistor R705 and the motor bus current sampling resistor, and are connected in parallel to capacitor 702. One end of capacitor 702 is connected to the negative terminal BAT_ of the vehicle power interface. Capacitor C700 and capacitor C704 are connected in series and then connected in parallel with capacitor C702. They are located between capacitor C700 and capacitor C704 and between capacitor C703 and the negative terminal BAT_ of the vehicle power interface.

6. A power window control system with anti-pinch function according to claim 5, characterized in that: The TVS diode D518 is model SMBJ12A. The capacitors C519, C520, C515, C518, C1, C2, C3, and C4 are ceramic capacitors with equal capacitance values ​​ranging from 0.1μF to 10μF. The LDO step-down converter U1 is model LM7805.

7. A power window control system with anti-pinch function according to claim 5, characterized in that: The resistor R529 and the negative temperature coefficient thermistor NTC500 together form a voltage divider circuit. The operational amplifier U700A is model LM358 or OP07. The resistors R700 and R703 have voltage dividing and current limiting functions. The resistor R701 is used for current sampling. The resistor R704 is used for feedback control to adjust the gain of the operational amplifier. The resistor R705 has current limiting and voltage dividing functions.

Images