CN117087447A - Continuous climbing control method and system for pure electric bus capable of avoiding high temperature of motor - Google Patents

Continuous climbing control method and system for pure electric bus capable of avoiding high temperature of motor Download PDF

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Publication number
CN117087447A
CN117087447A CN202311297631.XA CN202311297631A CN117087447A CN 117087447 A CN117087447 A CN 117087447A CN 202311297631 A CN202311297631 A CN 202311297631A CN 117087447 A CN117087447 A CN 117087447A
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China
Prior art keywords
preset
value
motor
temperature value
temperature
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Pending
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CN202311297631.XA
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Chinese (zh)
Inventor
岳才进
肖亮
吴洪亭
韩经鲁
董开雷
孙玉萍
高奎财
刘松建
栾林振
王景帆
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Zhongtong Bus Holding Co Ltd
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Zhongtong Bus Holding Co Ltd
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Priority to CN202311297631.XA priority Critical patent/CN117087447A/en
Publication of CN117087447A publication Critical patent/CN117087447A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application belongs to the technical field of vehicle control, and provides a continuous climbing control method and a continuous climbing control system for a pure electric bus, which avoid high temperature of a motor, wherein a first torque value is determined by looking up a table according to the opening degree of a driving pedal and the rotating speed of the motor; according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value; when the temperature value of the motor winding is not smaller than a first preset temperature value and not larger than a second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the second torque value is determined, the preset maximum upper limit power is determined through the preset linear change associated with the temperature between the first preset temperature value and the second preset temperature value, so that the real-time temperature of the motor can be controlled in a normal range between the first preset temperature value and the second preset temperature value, and the normal operation of the motor is ensured.

Description

Continuous climbing control method and system for pure electric bus capable of avoiding high temperature of motor
Technical Field
The application belongs to the technical field of vehicle control, and particularly relates to a continuous climbing control method and system for a pure electric bus capable of avoiding high temperature of a motor.
Background
In recent years, as pure electric buses have more advantages in energy conservation and noise compared with conventional buses, new energy buses are increasingly popular in markets, and meanwhile, as tourist attractions are increased year by year, environmental awareness is increased, and requirements of scenic spots on the pure electric buses are increased year by year. Because the passengers on the scenic spot are more, the weight of the vehicle is larger, and on some places with larger gradient and longer climbing distance, such as roads needing continuous climbing, the motor is easy to generate high temperature and possibly trigger the motor to be turned off due to faults, the driving power is suddenly reduced or even unpowered, the vehicle speed is instantaneously reduced, and hidden danger is caused to the safety of the passengers in the vehicle and the surrounding of the vehicle, especially the rear vehicle.
The inventor finds that in the existing temperature monitoring or vehicle control technology, the temperature monitoring is taken as the main part, after the temperature rises to the early warning temperature, faults are avoided by reducing the output torque and other modes, only the cooling problem is considered in the mode, the relation between the torque and the temperature change is not considered, the problem that the output torque does not meet the torque required by the whole vehicle is easily caused, and the method is not suitable for continuous climbing scenes with larger gradient; in addition, in some technologies, parameters such as a motor temperature threshold value and a maximum torque value are obtained by testing different working conditions, and an output torque value of the motor, which is linearly reduced under the optimization of the motor temperature, is obtained by calculation, so that the designated temperature for starting to reduce the output torque value of the motor is limited.
Disclosure of Invention
In order to solve the problems, the application provides a continuous climbing control method and a continuous climbing control system for a pure electric bus, which avoid high temperature of a motor, wherein when the second torque value is determined, the preset maximum upper limit power is determined between a first preset temperature value and a second preset temperature value through the preset linear change associated with temperature, so that the real-time temperature of the motor can be controlled in a normal range between the first preset temperature value and the second preset temperature value, and the normal operation of the motor is ensured; the relation between the torque and the temperature change is considered, so that the output torque meets the torque requirement of the whole vehicle under the conditions of continuous climbing and the like, and experimental tests are not needed to obtain judgment data.
In order to achieve the above object, the present application is realized by the following technical scheme:
in a first aspect, the present application provides a continuous climbing control method for a pure electric bus for avoiding high temperature of a motor, including:
acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
Further, the second torque value is equal to a ratio of a product of 9550 and a preset maximum upper limit power to the motor rotation speed.
Further, the first preset power value is a peak power value, and the second preset power value is a rated power value.
Further, the first preset temperature value is a temperature value corresponding to the peak power, and the second preset temperature value is a temperature value corresponding to the rated power.
Further, when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, the preset maximum upper limit power is equal to the sum of the value of the first preset power and the value of the difference between the motor winding temperature and the first preset temperature value multiplied by the preset proportion parameter.
Further, the preset ratio parameter is equal to a ratio of a difference between the second preset power value and the first preset power value to a difference between the second preset temperature value and the first preset temperature value.
Further, the second preset temperature value is smaller than the alarm fault temperature of the motor.
In a second aspect, the present application further provides a continuous climbing control system for a pure electric bus for avoiding high temperature of a motor, including:
a data acquisition module configured to: acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
a first torque value calculation module configured to: according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
a second torque value calculation module configured to: according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
a control module configured to: and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
In a third aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the continuous hill climbing control method for a pure electric bus of the first aspect for avoiding high temperatures of the motor.
In a fourth aspect, the present application further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the steps of the continuous climbing control method for a pure electric bus for avoiding high temperature of a motor according to the first aspect when executing the program.
Compared with the prior art, the application has the beneficial effects that:
1. according to the opening degree of the driving pedal and the rotating speed of the motor, a first torque value is determined by looking up a table; according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value; when the second torque value is determined, the preset maximum upper limit power is determined through the preset linear change associated with the temperature between the first preset temperature value and the second preset temperature value, so that the real-time temperature of the motor can be controlled in a normal range between the first preset temperature value and the second preset temperature value, the normal operation of the motor is ensured, and the situations of turn-off and the like of an Insulated Gate Bipolar Transistor (IGBT) in a high Wen Chuxian controller are avoided; the relation between the torque and the temperature change is considered, so that the output torque meets the torque requirement of the whole vehicle under the conditions of continuous climbing and the like, and test is not needed to be carried out to obtain judgment data;
2. the application effectively avoids the condition that the motor is stopped by high-temperature fault triggered by continuous climbing, solves the problem of high-temperature fault of the motor during continuous climbing by identifying the control mode that the temperature of the motor winding limits the maximum power of the motor, and increases the running safety of the whole vehicle.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate and explain the embodiments and together with the description serve to explain the embodiments.
FIG. 1 is a schematic diagram of the power versus temperature relationship of example 1 of the present application;
fig. 2 is a diagram showing the operation characteristics of the motor according to embodiment 1 of the present application.
Detailed Description
The application will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
at present, the pure electric bus is driven by a motor, so that the pure electric bus can adapt to most of flat and short-term slope conditions, but the whole bus needs long-time power requirements under the conditions of large climbing and large load capacity, and the motor is easy to be at high temperature under the condition of exceeding rated power for a long time, so that the safety of the bus is influenced; the rated power of the motor is the power of the motor capable of continuously running, but under the long-time running of continuous climbing, when the motor runs beyond the rated power of the motor, the temperature rise of the motor is faster according to the characteristics of the motor, and the motor exceeds a set protection threshold value, so that the motor is shut down and the like.
Aiming at the problems, the embodiment provides a continuous climbing control method of a pure electric bus for avoiding high temperature of a motor, which comprises the following steps:
acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
When the second torque value is determined, the preset maximum upper limit power is determined through the preset linear change associated with the temperature between the first preset temperature value and the second preset temperature value, so that the real-time temperature of the motor can be controlled in a normal range between the first preset temperature value and the second preset temperature value, the normal operation of the motor is ensured, and the situations of turn-off and the like of an Insulated Gate Bipolar Transistor (IGBT) in a high Wen Chuxian controller are avoided; the application considers the relation between the torque and the temperature change, so that the output torque meets the torque requirement of the whole vehicle under the conditions of continuous climbing and the like, and the test is not needed to be carried out to acquire judgment data.
In this embodiment, the first preset power value is a peak power value, and the second preset power value is a rated power value. The first preset temperature value is a temperature value corresponding to the peak power, and the second preset temperature value is a temperature value corresponding to the rated power. The maximum request power makes linear change related to temperature between peak power and rated power, the real-time temperature of the motor is controlled in a normal range, the motor is ensured to work normally, and the occurrence of IGBT turn-off condition of the controller due to high Wen Chuxian is avoided.
Optionally, the second torque value is equal to a ratio of a product of 9550 and a preset maximum upper limit power to the motor speed.
When the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, the preset maximum upper limit power is equal to the sum of the value of the first preset power and the value of the difference between the temperature of the motor winding and the first preset temperature value multiplied by the preset proportion parameter. The preset ratio parameter is equal to the ratio of the difference between the second preset power value and the first preset power value to the difference between the second preset temperature value and the first preset temperature value. The second preset temperature value is smaller than the alarm fault temperature of the motor.
Corresponding to the control method in the embodiment, a control system is also provided, which mainly comprises a whole vehicle controller, a motor controller and the like. The vehicle controller is used for calculating the current driving torque according to the current motor rotating speed and the opening degree of a driving pedal and sending out power torque request information on a vehicle CAN network; the motor controller is used for receiving the request torque of the whole vehicle controller to the motor, further controlling the output torque of the motor to be consistent with the request torque of the whole vehicle controller, and simultaneously collecting and transmitting the collected motor rotating speed signal and motor winding temperature to the whole vehicle CAN network in real time; specific:
optionally, the whole vehicle controller calculates a current torque value according to the opening of the driving pedal and the rotating speed of the motor through a program table lookup, and the torque value is used as table lookup torque T_ aim. And the integral control calculates the current maximum request torque upper limit T_max according to the preset maximum upper limit power P_max and the current motor rotating speed n, and the calculation formula is T_max=9550×P_max/n. The final target requested torque t_req is the smaller absolute value of the lookup table torque t_ aim and the current maximum requested torque t_max.
As shown in fig. 2, the preset maximum upper limit power p_max is affected by various aspects such as the failure of the whole vehicle, and in this embodiment, a method of affecting the preset maximum upper limit power p_max by the temperature of the motor is provided. The alarm fault temperature of the motor is t3, two temperature points of a first preset temperature t1 and a second preset temperature t2 are set, and t1< t2< t3 are defined; the first preset temperature t1 corresponds to the maximum power P and is the first preset power P1, and the second preset temperature t2 corresponds to the maximum power P and is the second preset power P2. The relation between the preset maximum upper limit power P_max and the temperature is as follows:
wherein: k is a preset proportion parameter, and the calculation formula is as follows:
specifically, when the motor temperature t rises to the first preset temperature value t1, the preset maximum upper limit power p_max is no longer a fixed value, but is adjusted according to the certain proportion parameter k. As shown in fig. 2, when the original motor rotation speed is nb and the temperature rises, the maximum upper limit power P is reduced, and the driving force T of the whole vehicle is basically unchanged because the gradient in the road condition is unchanged, as can be known from the formula t=9550×p/n, the reduction of the motor driving power can lead to the reduction of the driving motor rotation speed, when the motor driving power is reduced from Pb to Pa, the motor temperature reaches equilibrium, the vehicle speed is no longer reduced, and the motor rotation speed is na at the moment. The motor temperature is controlled in the range of [ t1, t2] by the mode of regulating the maximum upper limit power control of the motor.
Through the temperature control logic of the driving system, dangerous accidents of shutdown and parking caused by overhigh temperature of the motor due to overlarge gradient and overlong climbing time of the whole vehicle are avoided.
Example 2:
the embodiment provides a pure [ electric ] motor coach continuous climbing control system who avoids motor high temperature, includes:
a data acquisition module configured to: acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
a first torque value calculation module configured to: according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
a second torque value calculation module configured to: according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
a control module configured to: and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
The working method of the system is the same as the continuous climbing control method of the pure electric bus for avoiding the high temperature of the motor in embodiment 1, and is not repeated here.
Example 3:
the present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the continuous hill-climbing control method for a pure electric bus for avoiding a high temperature of a motor described in embodiment 1.
Example 4:
the embodiment provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the steps of the continuous climbing control method for the pure electric bus for avoiding the high temperature of the motor in embodiment 1 when executing the program.
The above description is only a preferred embodiment of the present embodiment, and is not intended to limit the present embodiment, and various modifications and variations can be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.

Claims (10)

1. A continuous climbing control method of a pure electric bus for avoiding high temperature of a motor is characterized by comprising the following steps:
acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
2. The continuous hill climbing control method for a pure electric bus for avoiding high temperature of a motor according to claim 1, wherein the second torque value is equal to a ratio of a product of 9550 and a preset maximum upper limit power to a rotational speed of the motor.
3. The continuous climbing control method for a pure electric bus for avoiding high temperature of a motor according to claim 1, wherein the first preset power value is a peak power value, and the second preset power value is a rated power value.
4. A continuous climbing control method for a pure electric bus for avoiding high temperature of a motor according to claim 3, wherein the first preset temperature value is a temperature value corresponding to a peak power, and the second preset temperature value is a temperature value corresponding to a rated power.
5. The continuous climbing control method for pure electric bus capable of avoiding high temperature of motor according to claim 1, wherein when the temperature value of the motor winding is not less than the first preset temperature value and not greater than the second preset temperature value, the preset maximum upper limit power is equal to the sum of the value of the first preset power and the difference between the temperature of the motor winding and the first preset temperature value multiplied by a preset proportion parameter.
6. A method for continuous hill climbing control of a pure electric bus for avoiding a high temperature of a motor according to claim 5, wherein the preset ratio parameter is equal to a ratio of a difference between the second preset power value and the first preset power value to a difference between the second preset temperature value and the first preset temperature value.
7. A method for continuous hill climbing control of a pure electric bus for avoiding high temperature of a motor according to claim 1, wherein the second preset temperature value is smaller than the alarm failure temperature of the motor.
8. Continuous climbing control system of pure [ electric ] motor coach of avoiding motor high temperature, its characterized in that includes:
a data acquisition module configured to: acquiring the opening degree of a driving pedal, the rotating speed of a motor and the temperature of a motor winding;
a first torque value calculation module configured to: according to the opening degree of a driving pedal and the rotating speed of a motor, a first torque value is determined by looking up a table;
a second torque value calculation module configured to: according to the preset maximum upper limit power and the motor rotating speed, calculating and determining a second torque value; the method comprises the steps that a preset maximum upper limit power is determined according to a motor winding temperature value; when the temperature value of the motor winding is smaller than a first preset temperature value, the preset maximum upper limit power is a first preset power value; when the temperature value of the motor winding is not smaller than the first preset temperature value and not larger than the second preset temperature value, determining a preset maximum upper limit power according to a preset linear change relation between the temperature of the motor winding and the preset maximum upper limit power; when the temperature value of the motor winding is larger than a second preset temperature value, the preset maximum upper limit power is a second preset power value; the first preset temperature value is smaller than the second preset temperature value;
a control module configured to: and controlling the motor according to the torque with smaller absolute value in the first torque value and the second torque value.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, realizes the steps of the continuous hill climbing control method for a pure electric bus avoiding high temperatures of a motor as claimed in any one of claims 1-7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, characterized in that the processor, when executing the program, realizes the steps of the continuous hill climbing control method of a pure electric bus avoiding high temperatures of the motor as claimed in any one of claims 1-7.
CN202311297631.XA 2023-10-08 2023-10-08 Continuous climbing control method and system for pure electric bus capable of avoiding high temperature of motor Pending CN117087447A (en)

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CN202311297631.XA CN117087447A (en) 2023-10-08 2023-10-08 Continuous climbing control method and system for pure electric bus capable of avoiding high temperature of motor

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