Control circuit and control method for improving reliability of starting motor based on high and cold working conditions
By designing a control circuit based on high-altitude working conditions in special vehicles, the working time of the starting motor is extended in real time and based on multiple logic judgments, the problem of too long starting time in extremely cold environments is solved, the starting success rate is improved and the service life of the starting motor is protected.
Patent Information
- Application Number
- CN202411478991.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-03-07
AI Technical Summary
In extremely cold environments, the starting time of special vehicles usually exceeds 30 seconds or even more than 1 minute, causing the starting motor to work more than the specified time under rated load, affecting its service life and startup success rate.
A control circuit based on high-altitude working conditions is designed, including a starter motor, an electrical integrated control module, a driver's operating panel, a current sensor and ambient temperature sensor. By monitoring the ambient temperature, voltage, current and temperature of the starting motor in real time, calculate the electrical power and power consumption, and extend the working time of the starting motor according to multiple logic judgment methods, while protecting its service life.
In extremely cold environments, the working time of the starter motor is extended, the success rate of a special vehicle is improved, and the service life of the starter motor is protected.
Smart Images
Figure CN119572392A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of automatic control, and in particular relates to a control circuit and a control method for improving the reliability of a starter motor based on high-cold working conditions. Background Art
[0002] In high-altitude and cold environments, the compression ignition speed of special vehicle engines is high and lasts for a long time. In extremely cold environments (ambient temperature below -35°C), the starting time of special vehicles generally exceeds 30s, and the starting time of some models of special vehicles may even exceed 1 minute. However, the instruction manual of the starter motor stipulates that the working time of the starter motor under rated load is 30s; therefore, it is necessary to study a control circuit that can both extend the starting time and ensure the service life of the starter motor, thereby improving the success rate of one-time starting of special vehicles in extremely cold environments. Summary of the invention
[0003] In view of this, the present invention provides a control circuit and a control method for improving the reliability of the starter motor based on extremely cold working conditions, which can extend the working time of the starter motor under the premise of ensuring the service life of the starter motor in an extremely cold environment.
[0004] The technical solution for implementing the present invention is as follows:
[0005] A control circuit for improving the reliability of a starter motor based on high-cold working conditions, comprising a starter motor, an electrical integrated control module, a driver operation panel, a current sensor, and an ambient temperature sensor;
[0006] The starter motor is used to drive the engine to rotate when the vehicle starts, until the engine speed reaches the compression ignition speed;
[0007] The electrical integrated control module is used for drive control and power distribution management, as well as the collection and processing of temperature, voltage and current signals;
[0008] The driver operation panel is used for human-machine interaction;
[0009] The current sensor is used to collect the current of the starter motor;
[0010] The temperature sensor is used to collect the ambient temperature.
[0011] Furthermore, the starter motor includes a main contactor, a stator temperature sensor, and a main contactor coil temperature sensor; the main contactor controls the operation of the starter motor; the stator temperature sensor monitors the temperature around the stator of the starter motor; and the main contactor coil temperature sensor monitors the temperature of the main contactor coil.
[0012] Furthermore, the electrical integrated control module includes a single chip microcomputer, an acquisition module and a communication module; the single chip microcomputer realizes the acquisition information calculation, control logic analysis, judgment and storage functions; the acquisition module realizes the acquisition of current, temperature, voltage, and I / O signals; the communication module can use CAN bus and FlexRay bus communication.
[0013] A control method for improving the reliability of a starter motor based on extremely cold working conditions. In an extremely cold environment, the driver presses the start button on the driver's operating panel, and the electrical integrated control module receives the start control signal and outputs a drive control signal to the starter motor. If the ambient temperature detected by the electrical integrated control module is ≤-5°C, the electric power of the starter motor is calculated based on the collected starter motor voltage and current, and the electric energy consumption of the starter motor during operation is calculated in real time, and compared in real time with the electric energy consumed within 30 seconds at the rated power stored in a single-chip microcomputer.
[0014] Control judgment:
[0015] a) When the engine speed is ≥350rpm, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working;
[0016] b) When the electric energy consumed during the starting process is ≥ the electric energy consumed by the rated power of the starter within 30 seconds, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working;
[0017] c) When the temperature of the motor main contactor coil is ≥150°C during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0018] d) When the temperature of the motor stator temperature sensor during the starting process is ≥180°C, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0019] e) When the motor continues to work for 60s±2s during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0020] f) When the minimum voltage of the starting process is ≤9V and the duration is ≥50m, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0021] g) When the engine speed is less than 350rpm, and the electric energy consumed during the starting process is less than the electric energy consumed within 30s of the starter rated power, and the temperature of the motor main contactor during the starting process is less than 150℃, and the temperature of the motor stator temperature sensor during the starting process is less than 180℃; the electrical integrated control module starts the motor drive control signal to continuously supply power, and the starter motor continues to work; until any one of the conditions a to f is met, the starter motor is turned off.
[0022] Furthermore, if the first start fails to drag the engine to the compression ignition speed, a second start is required and the start interval control should be performed. The control judgment is that the start interval time should be ≥300s, and the timing starts when the engine is ≤80rpm. When the interval time is ≥300s and the engine speed is ≤50rpm, the second start is performed. The second start time control is consistent with the control logic of the first start.
[0023] Beneficial effects:
[0024] 1. The present invention realizes the control of the starter motor rotation time in an extremely cold environment based on the internal temperature of the starter motor;
[0025] 2. The present invention realizes controlling the operation time of the starter motor in an extremely cold environment based on the electric energy of the starter motor;
[0026] 3. The present invention realizes the operation time of the starter motor in an extremely cold environment by starting and controlling the starter motor based on the starting voltage;
[0027] 4. The present invention constructs a multiple logic judgment method for starting control based on temperature, power consumption, time and voltage. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 Schematic diagram of the control circuit of the present invention. DETAILED DESCRIPTION
[0029] The present invention is described in detail below with reference to the accompanying drawings and embodiments.
[0030] The present invention provides a control circuit for improving the reliability of the starter motor based on high-cold working conditions. Figure 1 As shown, it mainly includes a starter motor, an electrical integrated control module, a driver operation panel, a current sensor, an ambient temperature sensor, etc.
[0031] Starter motor: The main function of the starter motor is to drive the engine to rotate when the vehicle is started, until the engine reaches the compression ignition speed. The internal control circuit components include the main contactor, stator temperature sensor, and main contactor coil temperature sensor. The main contactor controls the operation of the starter motor; the stator temperature sensor monitors the temperature around the starter motor stator; the starter motor main contactor coil temperature sensor monitors the temperature of the main contactor coil
[0032] Electrical integrated control module: The main functions of the electrical integrated control module are drive control and power distribution, as well as the acquisition and processing of temperature, voltage and current signals. It includes a single-chip microcomputer, an acquisition module and a communication module. The single-chip microcomputer realizes the functions of collecting information calculation, control logic analysis, judgment and storage; the acquisition module realizes the acquisition of current, temperature, voltage, and I / O signals; the power supply is used to supply power to the single-chip microcomputer and the acquisition module; the communication module can use CAN bus and FlexRay bus communication.
[0033] Driver operating panel: The driver operating panel is a human-computer interaction panel. The starting signal of this patent is sent from the driver operating panel to the electrical integrated control module through the bus.
[0034] Current sensor: The main function of the current sensor is to collect the current of the starting motor.
[0035] Ambient temperature sensor: The main function of the temperature sensor is to collect ambient temperature.
[0036] Control Methods
[0037] Starting control: In extremely cold environments, when the driver presses the start button on the driver's operating panel, the electrical integrated control module receives the starting control signal and outputs a drive control signal to the starter motor. If the ambient temperature detected by the electrical integrated control module is ≤-5°C, the electric power of the starter motor is calculated based on the collected voltage and current of the starter motor, and the electric energy consumption of the starter motor is calculated in real time, and compared with the electric energy consumed within 30 seconds at the rated power stored in the single-chip microcomputer in real time.
[0038] Control judgment:
[0039] a) When the engine speed is ≥350rpm, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working;
[0040] b) When the electric energy consumed during the starting process is ≥ the electric energy consumed by the rated power of the starter within 30 seconds, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working;
[0041] c) When the temperature of the motor main contactor coil is ≥150°C during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0042] d) When the temperature of the motor stator temperature sensor during the starting process is ≥180°C, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0043] e) When the motor continues to work for 60s±2s during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0044] f) When the minimum voltage of the starting process is ≤9V and the duration is ≥50m, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working;
[0045] g) When the engine speed is less than 350rpm, and the electric energy consumed during the starting process is less than the electric energy consumed within 30s of the rated power of the starter, and the temperature of the motor main contactor during the starting process is less than 150℃, and the temperature of the motor stator temperature sensor during the starting process is less than 180℃; the electrical integrated control module starts the motor drive control signal to continuously supply power, and the starter motor continues to work. Until the conditions a), b), c), d), e), and f) are met, the starter motor is turned off.
[0046] Repeated start control: If the first start fails to drive the engine to the compression ignition speed, a second start is required. The start interval control should be performed. The control judgment should be that the start interval time should be ≥300s. The engine
[0047] ≤80rpm, start timing, when the interval time is ≥300s, and the engine speed should be ≤50rpm, start the second time, and the control logic of the second start time is consistent with the control logic of the first start;
[0048] If the second start fails to drag the engine speed to the compression ignition speed, a third start is allowed and the start interval control should be performed. The control judgment is that the start interval time should be ≥300s, and the timing starts when the engine is ≤80rpm. When the interval time is ≥300s and the engine speed is ≤50rpm, the third start is performed. The third start time control is consistent with the control logic of the first start.
[0049] The present invention determines the working time of the starter motor by monitoring the consumption of electric energy during the starting process, as well as the temperature of the starter motor stator and the internal main contactor. This not only prolongs the working time of the starter motor, but also protects the starter motor from overheating and damage to internal components due to excessive starting time, thereby improving the success rate of one-time starting of special vehicles in extremely cold environments.
[0050] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A control circuit for improving the reliability of a starter motor based on high-cold working conditions, characterized in that: Including starter motor, electrical integrated control module, driver operation panel, current sensor, ambient temperature sensor; The starter motor is used to drive the engine to rotate when the vehicle starts, until the engine speed reaches the compression ignition speed; The electrical integrated control module is used for drive control and power distribution management, as well as the collection and processing of temperature, voltage and current signals; The driver operation panel is used for human-machine interaction; The current sensor is used to collect the current of the starter motor; The temperature sensor is used to collect the ambient temperature.
2. The control circuit according to claim 1, characterized in that: The starter motor includes a main contactor, a stator temperature sensor, and a main contactor coil temperature sensor; the main contactor controls the operation of the starter motor; the stator temperature sensor monitors the temperature around the stator of the starter motor; and the main contactor coil temperature sensor monitors the temperature of the main contactor coil.
3. The control circuit according to claim 1 or 2, characterized in that: The electrical integrated control module includes a single-chip microcomputer, an acquisition module and a communication module; the single-chip microcomputer realizes the functions of acquisition information calculation, control logic analysis, judgment and storage; the acquisition module realizes the acquisition of current, temperature, voltage, and I / O signals; the communication module can use CAN bus and FlexRay bus communication.
4. A control method applied to the control circuit of claim 1, characterized in that: In an extremely cold environment, the driver presses the start button on the driver's operating panel, and the electrical integrated control module receives the start control signal and outputs a drive control signal to the starter motor. If the ambient temperature detected by the electrical integrated control module is ≤-5°C, the electrical power of the starter motor is calculated based on the collected voltage and current of the starter motor, and the electrical energy consumption of the starter motor is calculated in real time, and compared with the electrical energy consumed within 30 seconds at the rated power stored in the single-chip computer in real time; Control judgment: a) When the engine speed is ≥350rpm, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working; b) When the electric energy consumed during the starting process is ≥ the electric energy consumed by the rated power of the starter within 30 seconds, the electrical integrated control module shuts off the output of the drive control signal and the starter motor stops working; c) When the temperature of the motor main contactor coil is ≥150°C during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working; d) When the temperature of the motor stator temperature sensor during the starting process is ≥180°C, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working; e) When the motor continues to work for 60s±2s during the starting process, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working; f) When the minimum voltage of the starting process is ≤9V and the duration is ≥50m, the electrical integrated control module shuts off the output of the drive control signal and the starting motor stops working; g) When the engine speed is less than 350rpm, and the electric energy consumed during the starting process is less than the electric energy consumed within 30s of the starter rated power, and the temperature of the motor main contactor during the starting process is less than 150℃, and the temperature of the motor stator temperature sensor during the starting process is less than 180℃; the electrical integrated control module starts the motor drive control signal to continuously supply power, and the starter motor continues to work; until any one of the conditions a to f is met, the starter motor is turned off.
5. The control method according to claim 4, characterized in that: If the first start fails to drag the engine to the compression ignition speed, a second start is required. The start interval control should be performed. The control judgment is that the start interval time should be ≥300s, and the timing starts when the engine ≤80rpm. When the interval time is ≥300s and the engine speed is ≤50rpm, the second start is performed. The second start time control is consistent with the control logic of the first start.