Automobile suspension gear pump control device

Abstract

The utility model discloses an automobile suspension gear pump control device, which can accurately monitor and control the running state of a motor by sampling the current of the motor in real time, detecting the three-phase counter electromotive force and monitoring the working temperature, and is beneficial to reducing the energy consumption and improving the working efficiency of a gear pump by accurately controlling the motor. The inverter adjusts the voltage and frequency of the motor according to instructions of the master control module, optimizes the operation efficiency and reduces unnecessary energy consumption, the temperature detection circuit avoids overheating of the motor, prolongs the service life, triggers a protection mechanism in case of abnormity and improves the reliability and safety of the system, the current sampling circuit monitors current in real time, and once abnormity such as overload or short circuit is found, the system is safe and reliable. The main control module immediately takes measures to protect the motor, the main control module comprehensively monitors the state of the motor and provides fault alarm and positioning information, rapid maintenance is facilitated, and on the whole, the response speed, stability and energy efficiency of the suspension system are improved through the scheme.

Description

Technical Field

[0001] This utility model relates to the field of automotive control technology, and in particular to an automotive suspension gear pump control device. Background Technology

[0002] In the continuous progress of the automotive industry, the performance optimization of the suspension system has always been a key area for improving vehicle handling, driving stability and ride comfort. As a crucial hydraulic power source in the suspension system, the improvement of the control technology of the gear pump is essential for improving the efficiency and reliability of the entire system. However, the existing automotive suspension gear pump control technology has revealed some significant defects in practice, which limit the further improvement of the suspension system performance. Specifically: (1) Existing gear pump motor control methods often rely on traditional open-loop or simple closed-loop control strategies. These strategies are inadequate when dealing with complex and changing working conditions. Due to the lack of high-precision current, temperature and back EMF detection methods, the motor control is often not precise enough, resulting in large fluctuations in the output pressure of the gear pump, which affects the stability and response speed of the suspension system; (2) Due to the imperfection of the motor control strategy, the existing automotive suspension gear pump control system has obvious shortcomings in energy efficiency. During the start-up, acceleration and deceleration of the motor, there is often a large energy loss, which not only increases the vehicle's fuel consumption, but also aggravates environmental pollution; (3) The motor generates a lot of heat during operation, and the existing temperature detection and control methods often cannot reflect the actual temperature state of the motor in a timely and accurate manner. This results in the motor not being able to be cooled in a timely and effective manner when it is overheated, thereby accelerating the aging and damage of the motor and reducing the service life of the suspension system; (4) For three-phase motors, back electromotive force is an important parameter reflecting the motor's operating state. However, the existing three-phase back electromotive force detection methods often have problems such as insufficient accuracy and slow response speed, resulting in insufficient motor control and affecting the performance and stability of the suspension system. Utility Model Content

[0003] In view of this, the present invention proposes an automotive suspension gear pump control device, which can solve the obvious defects of the prior art in terms of motor control accuracy, energy efficiency, temperature management, and three-phase back electromotive force detection.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A vehicle suspension gear pump control device, comprising:

[0006] The power supply circuit provides operating voltage to the motor drive inverter, current sampling circuit, temperature detection circuit, three-phase back EMF detection circuit, and main control module.

[0007] Motor drive inverter and current sampling circuit are used to drive the gear pump motor and sample the motor current;

[0008] Temperature detection circuit, used to detect the operating temperature of the motor;

[0009] The three-phase back electromotive force detection circuit is used to detect the three-phase back electromotive force of the motor and feed it back to the main control module.

[0010] The main control module is used to receive motor current data, motor operating temperature data, and motor three-phase back electromotive force data, and to control the gear pump motor.

[0011] As a further optional embodiment of the automotive suspension gear pump control device, the power supply circuit includes:

[0012] Power supply filtering and reverse connection protection circuits are used to filter the input power supply and prevent reverse connection.

[0013] An LDO (Low Voltage Detector) step-down circuit is used to step down the input power supply.

[0014] The bootstrap boost circuit is used to provide drive voltage for the motor drive inverter and current sampling circuit.

[0015] As a further optional embodiment of the automotive suspension gear pump control device, the power supply circuit also includes:

[0016] The bus voltage detection circuit is used to detect the bus voltage and feed it back to the main control module.

[0017] As a further optional embodiment of the vehicle suspension gear pump control device, the device also includes:

[0018] The CAN communication circuit is used to communicate with the host computer, receive control commands, and provide feedback on the status of the main control module.

[0019] As a further optional solution for the automotive suspension gear pump control device, the main control module includes the FU6866Q chip and its peripheral circuitry.

[0020] As a further optional solution for the automotive suspension gear pump control device, the LDO step-down circuit includes an LN20042Q1-DFR chip and its peripheral circuitry.

[0021] As a further optional solution for the automotive suspension gear pump control device, the CAN communication circuit includes the SIT1042AQT chip and its peripheral circuitry.

[0022] The beneficial effects of this invention are as follows: By sampling the motor current in real time, this technical solution can accurately monitor the motor's operating status, including load changes and abnormal currents, thereby achieving precise control of the motor. This precise control helps reduce energy consumption and improve the working efficiency of the gear pump. The three-phase back electromotive force is an important indicator of the motor's operating status. By detecting and feeding it back to the main control module, precise control of the motor's speed, position, and magnetic field can be achieved. This helps improve the response speed and stability of the suspension system. The inverter can precisely adjust the motor's voltage and frequency according to the instructions of the main control module, thereby optimizing the motor's operating efficiency. This helps reduce unnecessary energy consumption and improve the energy efficiency of the entire suspension system. By monitoring the motor's operating temperature in real time, this technical solution can prevent the motor from... Overheating is minimized, reducing energy loss due to excessive temperature. Temperature control also helps extend the motor's lifespan. When the motor temperature rises abnormally, the temperature detection circuit can quickly issue an alarm and trigger a protection mechanism to prevent motor damage. This helps improve the reliability and safety of the entire suspension system. The current sampling circuit can monitor the motor's current in real time. Once an abnormal current is detected, such as overload or short circuit, the main control module will immediately take measures to protect the motor from damage. The main control module can receive and analyze data from the current sampling circuit, temperature detection circuit, and three-phase back EMF detection circuit to achieve comprehensive monitoring of the motor's status. Once abnormal data is detected, the main control module can issue an alarm and provide fault location information, helping maintenance personnel to quickly troubleshoot the fault. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the composition of a gear pump control device for an automotive suspension according to the present invention;

[0025] Figure 2 This is a circuit diagram of the motor drive inverter and current sampling circuit in this utility model;

[0026] Figure 3 This is a circuit diagram of the temperature detection circuit in this utility model;

[0027] Figure 4 This is a circuit diagram of the three-phase back electromotive force detection circuit in this utility model;

[0028] Figure 5 This is a circuit diagram of the main control module in this utility model;

[0029] Figure 6 This is a circuit diagram of the power supply filtering and reverse connection protection circuit in this utility model;

[0030] Figure 7 This is a circuit diagram of the LDO step-down circuit in this utility model;

[0031] Figure 8 This is a circuit diagram of the bootstrap boost circuit in this utility model;

[0032] Figure 9 This is a circuit diagram of the bus voltage detection circuit in this utility model;

[0033] Figure 10 This is a circuit diagram of the CAN communication circuit in this utility model. Detailed Implementation

[0034] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] refer to Figures 1 to 10 A vehicle suspension gear pump control device, comprising:

[0036] The power supply circuit provides operating voltage to the motor drive inverter, current sampling circuit, temperature detection circuit, three-phase back EMF detection circuit, and main control module.

[0037] Motor drive inverter and current sampling circuit are used to drive the gear pump motor and sample the motor current;

[0038] Temperature detection circuit, used to detect the operating temperature of the motor;

[0039] The three-phase back electromotive force detection circuit is used to detect the three-phase back electromotive force of the motor and feed it back to the main control module.

[0040] The main control module is used to receive motor current data, motor operating temperature data, and motor three-phase back electromotive force data, and to control the gear pump motor.

[0041] In this embodiment, by sampling the motor current in real time, this technical solution can accurately monitor the motor's operating status, including load changes and abnormal currents, thereby achieving precise control of the motor. This precise control helps reduce energy consumption and improve the efficiency of the gear pump. The three-phase back electromotive force is an important indicator of the motor's operating status. By detecting and feeding it back to the main control module, precise control of the motor's speed, position, and magnetic field can be achieved. This helps improve the response speed and stability of the suspension system. The inverter can precisely adjust the motor's voltage and frequency according to the instructions of the main control module, thereby optimizing the motor's operating efficiency. This helps reduce unnecessary energy consumption and improve the energy efficiency of the entire suspension system. By monitoring the motor's operating temperature in real time, this technical solution can prevent the motor from overheating. To reduce energy loss due to overheating, temperature control also helps extend the motor's lifespan. When the motor temperature rises abnormally, the temperature detection circuit can quickly issue an alarm and trigger a protection mechanism to prevent motor damage. This helps improve the reliability and safety of the entire suspension system. The current sampling circuit can monitor the motor's current in real time. Once an abnormal current is detected, such as overload or short circuit, the main control module will immediately take measures to protect the motor from damage. The main control module can receive and analyze data from the current sampling circuit, temperature detection circuit, and three-phase back EMF detection circuit to achieve comprehensive monitoring of the motor's status. Once abnormal data is detected, the main control module can issue an alarm and provide fault location information, helping maintenance personnel to quickly troubleshoot the fault.

[0042] It should be noted that the inverter in the motor drive inverter and current sampling circuit consists of 6 NMOS transistors. The main control module can control the inverter to drive the brushless DC motor and achieve the specified functions. In addition, the current sampling is carried out by the sampling resistor and then filtered before being acquired by the ADC module of the main control module. In the temperature detection circuit, the NTC resistor exhibits different resistance values ​​when the temperature changes. This characteristic can be used to calculate the actual temperature value according to the parameters in the datasheet. In the three-phase back EMF detection circuit, the three-phase voltage signals are filtered by resistor divider before being acquired by the MCU.

[0043] Preferably, the power supply circuit includes:

[0044] Power supply filtering and reverse connection protection circuits are used to filter the input power supply and prevent reverse connection.

[0045] An LDO (Low Voltage Detector) step-down circuit is used to step down the input power supply.

[0046] The bootstrap boost circuit is used to provide drive voltage for the motor drive inverter and current sampling circuit.

[0047] In this embodiment, the power supply filtering circuit effectively removes high-frequency noise and interference from the input power supply, ensuring a stable and clean DC power supply for subsequent circuits. This helps reduce noise interference in the circuit and improves the stability and reliability of the entire control system. The reverse connection protection circuit detects and prevents reverse connection of the power supply, i.e., prevents the positive and negative terminals of the power supply from being incorrectly connected. This protection mechanism is crucial for preventing circuit damage and avoiding safety hazards such as short circuits and fires. The LDO (Low Dropout Linear Regulator) step-down circuit stably reduces the high input voltage to the required low voltage level, providing a stable power supply voltage for subsequent circuit modules. This voltage regulation capability helps ensure that each circuit module operates at its rated operating voltage. This improves the system's performance and reliability. Compared to other buck converters, LDO circuits generate less heat and consume less power during the buck process, which is significant for improving the energy efficiency of the entire control system and extending battery life. The bootstrap boost circuit can raise the input low voltage to a higher voltage level, providing sufficient drive voltage for the motor drive inverter and current sampling circuit, which is crucial for ensuring the motor can start, run, and sample current normally. By using the bootstrap boost circuit, the direct use of high-voltage power supplies can be avoided, thereby reducing the overall power consumption and cost of the system. At the same time, since the bootstrap boost circuit can dynamically adjust the voltage during motor operation, it helps to improve the system's efficiency and response speed.

[0048] It should be noted that the power supply filtering and reverse connection protection circuit uses a high-power TVS to clamp high-energy pulses and protect the subsequent circuits. A second-order LC filter is designed, which not only has strong anti-interference ability, but also generates less external noise interference. In addition, a high-power NMOS transistor is used to form a switch reverse connection protection circuit, which can prevent the circuit from being damaged by negative voltage when the power supply is reversed.

[0049] Preferably, the power supply circuit further includes:

[0050] The bus voltage detection circuit is used to detect the bus voltage and feed it back to the main control module.

[0051] In this embodiment, the bus voltage detection circuit can monitor the bus voltage in the power supply circuit in real time. This is an important indicator of the stability of the power supply system. By continuously monitoring the bus voltage, abnormal conditions such as voltage fluctuations, overvoltage, or undervoltage can be detected in a timely manner, thereby ensuring the stable operation of the power supply circuit. Abnormal fluctuations in the bus voltage may damage other components in the power supply circuit. For example, excessively high bus voltage may cause capacitors, transistors, and other components to break down, while excessively low bus voltage may cause the circuit to malfunction. The bus voltage detection circuit can detect these abnormal conditions in a timely manner and feed them back to the main control module so that the main control module can take protective measures, such as cutting off the power supply or reducing the power, thereby avoiding circuit damage. The bus voltage detection circuit improves the overall automotive suspension The reliability of the gear pump control device is enhanced by real-time monitoring of the bus voltage, which allows for the timely detection and resolution of potential power supply problems, thus preventing system downtime or malfunctions caused by power failures. The bus voltage detection circuit also helps optimize energy utilization; by monitoring the bus voltage, the main control module can understand the actual operating status of the power circuit and adjust motor operating parameters, such as speed and power, to achieve more efficient energy use. Furthermore, the bus voltage detection circuit facilitates fault diagnosis and maintenance. When a power circuit malfunctions, it provides crucial fault information, helping maintenance personnel quickly locate the problem and take effective repair measures. This reduces maintenance costs and time, and improves the overall system availability and maintenance efficiency.

[0052] Preferably, the device further includes:

[0053] The CAN communication circuit is used to communicate with the host computer, receive control commands, and provide feedback on the status of the main control module.

[0054] In this embodiment, the inclusion of a CAN communication circuit allows the automotive suspension gear pump control device to be easily integrated into the vehicle's CAN network. This means the device can seamlessly communicate and share data with other vehicle control systems (such as the engine control unit and brake control unit). This flexible system integration capability helps improve the overall performance and intelligence level of the vehicle. Through the CAN communication circuit, the host computer can remotely monitor and maintain the automotive suspension gear pump control device. This includes real-time viewing of the device's operating status, receiving fault alarm information, and remote parameter adjustments. This convenient remote monitoring and maintenance capability reduces vehicle maintenance costs and time, and improves vehicle availability and operating efficiency. The CAN communication circuit also has powerful fault diagnosis capabilities. When the automotive suspension gear pump control device malfunctions, the CAN communication circuit can quickly transmit fault information to the host computer, helping maintenance personnel quickly locate the problem.

[0055] Preferably, the main control module includes an FU6866Q chip and its peripheral circuitry.

[0056] Preferably, the LDO step-down circuit includes an LN20042Q1-DFR chip and its peripheral circuitry.

[0057] In this embodiment, an LDO step-down circuit is used. This circuit uses an LDO chip and external resistors and capacitors to form a 5V output linear regulator. It has low ripple, fast response speed, ultra-low static power consumption and over-temperature and over-current protection functions, providing a stable power supply guarantee for the subsequent circuits.

[0058] Preferably, the CAN communication circuit includes a SI T1042AQT chip and its peripheral circuits.

[0059] In this embodiment, the CAN communication module circuit uses the SIT1042AQT chip. This chip has built-in over-temperature protection, a bus port with ±58V withstand voltage, undervoltage protection on the VCC and VIO power supply pins, and a low-power standby mode with wake-up function. It is used to communicate with the host computer, receive control commands, and provide feedback on the status of the main control module.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automotive suspension gear pump control device characterized by comprising: The application relates to a gear pump motor control device, which comprises the following parts: a power supply circuit for providing working voltage for a motor drive inverter and current sampling circuit, a temperature detection circuit, a three-phase back electromotive force detection circuit and a main control module; a motor drive inverter and current sampling circuit for driving a gear pump motor and sampling motor current; a temperature detection circuit for detecting the working temperature of the motor; a three-phase back electromotive force detection circuit for detecting the three-phase back electromotive force of the motor and feeding back to the main control module; a main control module for receiving motor current data, working temperature data of the motor and three-phase back electromotive force data of the motor and controlling the gear pump motor.

2. A control device for a gear pump of an automobile suspension according to claim 1, wherein The power supply circuit comprises: a power supply filtering and reverse connection prevention circuit for filtering the input power supply and preventing reverse connection; an LDO voltage reduction circuit for reducing the input power supply; a bootstrap voltage boosting circuit for providing driving voltage for the motor drive inverter and current sampling circuit.

3. A control device for a gear pump of an automobile suspension according to claim 2, wherein The power supply circuit further comprises: a bus voltage detection circuit for detecting the bus voltage and feeding back to the main control module.

4. A control device for a gear pump of an automobile suspension according to claim 3, wherein The device further comprises: a CAN communication circuit for communicating with an upper computer, receiving control instructions and feeding back the related state of the main control module.

5. A control device for a gear pump of an automobile suspension according to claim 4, wherein The main control module comprises a FU6866Q chip and its peripheral circuit.

6. A control device for a gear pump of an automobile suspension according to claim 5, wherein The LDO voltage reduction circuit comprises an LN20042Q1-DFR chip and its peripheral circuit.

7. A control device for a gear pump of an automobile suspension according to claim 6, wherein The CAN communication circuit comprises an SIT1042AQT chip and its peripheral circuit.

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