CN117400707A - Driving motor heat dissipation system of pure electric mining dump truck and control method - Google Patents

Driving motor heat dissipation system of pure electric mining dump truck and control method Download PDF

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Publication number
CN117400707A
CN117400707A CN202311378197.8A CN202311378197A CN117400707A CN 117400707 A CN117400707 A CN 117400707A CN 202311378197 A CN202311378197 A CN 202311378197A CN 117400707 A CN117400707 A CN 117400707A
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China
Prior art keywords
fan
driving motor
vcu
temperature value
critical temperature
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Pending
Application number
CN202311378197.8A
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Chinese (zh)
Inventor
李靖
刘强
刘雨默
李官平
李兆华
王浩东
张强
孙明达
朱鹤旭
郭海全
张耀斌
李来平
王逢全
赵磊
柴江
丁磊
常亮
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Inner Mongolia North Hauler JSCL
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Inner Mongolia North Hauler JSCL
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Priority to CN202311378197.8A priority Critical patent/CN117400707A/en
Publication of CN117400707A publication Critical patent/CN117400707A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The invention discloses a heat dissipation system of a driving motor of a pure electric mining dump truck, which comprises the following components: the vehicle control unit VCU, the radiator, the water pump and the driving motor are arranged, the radiator is provided with a fan and a fan controller, the driving motor is provided with a heat exchanger and a motor controller, and the water pump is provided with a water pump controller; the water outlet of the heat exchanger is connected with the water inlet of the heat radiator through a heat dissipation pipeline; the VCU is connected with the fan controller and the water pump controller respectively through signal lines, and the VCU and the motor controller are connected with the control bus respectively. The invention also discloses a control method of the heat dissipation system of the driving motor of the pure electric mining dump truck. The invention can avoid oscillation of the rotating speed of the fan at the critical temperature value, prolong the service life of the fan and improve the reliability of the system.

Description

Driving motor heat dissipation system of pure electric mining dump truck and control method
Technical Field
The invention relates to the technical field of off-highway dumper control, in particular to a heat dissipation system and a control method for a driving motor of a pure electric mining dumper.
Background
With the rapid development of battery and motor technologies, more and more mine engineering machinery adopts a motor driving mode. In particular, the pure electric mining dump truck has the advantages of high working efficiency, low running cost and the like, and has remarkable great advantages in the aspect of mine transportation. The driving motor is used as one of important components of the driving system of the pure electric mining dump truck, and the working efficiency of the driving motor directly influences the working efficiency of the whole truck and the running cost of the driving motor. The working performance of the driving motor is greatly influenced by temperature, and when the temperature of the driving motor is too high, the driving motor can enter a self-protection state, so that the working efficiency of the driving motor is low, the mine production efficiency is seriously influenced, and therefore, the working efficiency of a heat dissipation system of the driving motor is very important for the pure electric mining dump truck.
At present, many driving motors of the pure electric mining dumper adopt an air cooling mode, and the air cooling mode has the defects of high difficulty in pipeline arrangement, large occupied space and high design requirement on a radiator, and is not suitable for small and medium tonnage vehicle types. At present, a driving motor of a medium-small tonnage vehicle type mostly adopts a water cooling mode, and the control of the water cooling mode mainly controls the start and stop of a water pump and the rotating speed of a radiator fan, and the control mode is simple in logic, but the control of the rotating speed of the fan is not accurate enough, and the fan can vibrate when the rotating speed of the fan is at a critical temperature value (the critical temperature value is stored in a fan controller), so that the reliability of the fan is affected.
Disclosure of Invention
The invention aims to provide a heat dissipation system and a control method for a driving motor of a pure electric mining dump truck, which can avoid oscillation of the rotating speed of a fan at a critical temperature value, prolong the service life of the fan and improve the reliability of the system.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
the utility model provides a pure electric mining dump truck driving motor cooling system, includes: the vehicle control unit VCU, the radiator, the water pump and the driving motor are arranged, the radiator is provided with a fan and a fan controller, the driving motor is provided with a heat exchanger and a motor controller, and the water pump is provided with a water pump controller; the water outlet of the heat exchanger is connected with the water inlet of the heat radiator through a heat dissipation pipeline; the VCU is respectively connected with the fan controller and the water pump controller through signal lines, the VCU is used for controlling the rotating speed of the fan and the starting and stopping of the water pump, the VCU and the motor controller are respectively connected with the control bus, and the VCU obtains the temperature value of the driving motor through the control bus.
Further, the radiator, the water pump, the heat exchanger and the radiating pipeline form a radiating loop.
Further, the VCU, the fan controller and the water pump controller are respectively provided with a PWM interface, the signal wire is a pulse width modulation PWM signal wire, and the VCU controls the rotating speed of the fan and the start and stop of the water pump in a PWM mode.
Further, the VCU and the motor controller are respectively provided with a controller area network bus communication interface, the controller area network bus is selected as the control bus, and the VCU exchanges information with the motor controller through the controller area network bus.
A control method of a driving motor heat dissipation system of a pure electric mining dump truck comprises the following steps:
the VCU checks that the vehicle is in a starting state, and a water pump on a heat dissipation loop is in a working state;
the VCU detects the temperature of the driving motor, and controls the fan to change the rotating speed according to steps in a set temperature interval, wherein the set temperature interval is a temperature interval between a head end critical temperature value and a tail end critical temperature value; when the driving motor is at the critical temperature value, the rotating speed of the fan is kept unchanged.
Preferably, the VCU checks whether the vehicle is in a start state, if so, instructs the water pump on the radiator circuit to start operating, otherwise, the VCU instructs the water pump on the radiator circuit to stop operating, and the radiator fan stops operating.
Preferably, the VCU issues a command to the water pump controller through a PWM signal line, and the water pump controller controls the water pump to start and start working; the motor controller reports the current temperature value to the VCU through the CAN bus, the VCU judges whether the current temperature value is in a set temperature range, the VCU sends a command to the fan controller through the PWM signal line, and the fan controller controls the fan to operate at the set rotating speed or change the rotating speed according to steps.
Preferably, the fan speed is kept unchanged when the driving motor is at a critical temperature value by a temperature hysteresis value, and the temperature hysteresis value is 5-10 ℃.
Preferably, the set rotation speed of the fan includes: the first speed is less than the second speed and less than the third speed; the critical temperature values are divided into a first critical temperature value, a second critical temperature value and a third critical temperature value, wherein the first critical temperature value is less than the second critical temperature value and less than the third critical temperature value; the VCU1 judges whether the temperature of the driving motor is larger than or equal to a first critical temperature value and smaller than a second critical temperature value, if yes, the VCU judges whether the temperature of the driving motor is smaller than the temperature of the second critical temperature value minus a temperature hysteresis value or whether the fan is in a stop state, and if yes, the VCU controls the fan to operate according to a first speed; otherwise, the VCU continues to judge whether the temperature of the driving motor is larger than or equal to a second critical temperature value and smaller than a third critical temperature value, if so, the VCU judges whether the temperature of the driving motor is smaller than the temperature obtained by subtracting the temperature hysteresis value from the third critical temperature value or whether the fan is at a first speed, and if so, the VCU controls the fan to run at a second speed; otherwise, the VCU judges whether the temperature of the driving motor is greater than or equal to a third critical temperature value, and if so, the VCU controls the fan to run at a third speed; otherwise, the VCU judges whether the temperature of the driving motor is less than the temperature of the first critical temperature value minus the temperature hysteresis value, and if so, the VCU commands the fan to stop running.
Preferably, the first speed is 1200rpm, the second speed is 2900rpm, the third speed is 4800rpm, the first critical temperature value is 70 ℃, the second critical temperature value is 95 ℃, and the third critical temperature value is 110 ℃.
The technical effects of the invention include:
1. the starting and stopping of the water pump on the heat dissipation loop can be automatically controlled according to the state of the vehicle;
2. the rotating speed of the fan of the radiator can be dynamically adjusted according to the interval of the temperature value of the driving motor, so that the temperature rise of the driving motor is effectively controlled, and the driving motor is ensured to work normally;
3. the temperature rise of the driving motor can be effectively limited, the working efficiency of the heat dissipation system of the driving motor is high, and the energy consumption is low;
4. the temperature hysteresis control can be realized in the fan rotating speed change process, the fan rotating speed is prevented from oscillating at a critical temperature value, the service life of the fan is prolonged, and the reliability of the system is improved.
Drawings
Fig. 1 is a structural schematic diagram of a heat dissipation system of a driving motor of a pure electric mining dump truck;
FIG. 2 is a working flow chart of a control method of a heat dissipation system of a driving motor of the pure electric mining dump truck;
fig. 3 is a schematic diagram showing the change of the fan rotation speed along with the temperature change of the driving motor in the invention.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic structural diagram of a heat dissipation system of a driving motor of a pure electric mining dump truck.
The utility model provides a pure electric mining dump truck driving motor cooling system, includes: a Vehicle Control Unit (VCU) 1, a radiator 2, a water pump 3 and a drive motor 4.
The radiator 2 is provided with a fan 21 and a fan controller, the driving motor 4 is provided with a heat exchanger 41 and a motor controller, and the water pump 3 is provided with a water pump controller; the water outlet of the radiator 2 is connected with the water inlet of the water pump 3 through a heat dissipation pipeline 5, the water outlet of the water pump 3 is connected with the water inlet of the heat exchanger 41 of the driving motor through the heat dissipation pipeline 5, and the water outlet of the heat exchanger 41 is connected with the water inlet of the radiator 2 through the heat dissipation pipeline 5; the radiator 2, the water pump 3, the heat exchanger 41 and the radiating pipeline 5 form a radiating loop; VCU1 is connected with fan controller of fan 21, the water pump controller of water pump 3 respectively through signal line 6, and VCU1 controls the rotational speed of fan 21 and the start-stop of water pump 3, and VCU1, motor controller are connected with control bus 7 respectively, and VCU1 obtains driving motor 4's temperature value through control bus 7.
In the preferred embodiment, the signal line 6 is a PWM (Pulse Width Modulation ) signal line, and the VCU1 controls and controls the rotation speed of the fan 21 and the start and stop of the water pump 3 through PWM. The VCU1, the fan controller and the water pump controller are respectively provided with a PWM interface, the PWM interface has a two-way communication function, the PWM interface is used for controlling analog circuit equipment through digital output, and the PWM interface can set the frequency and the duty ratio of output square waves to realize the start and stop of the water pump 3 and the rotating speed and the start and stop of the fan 21. The fan controller reads the speed regulating signal of the VCU1 through the PWM interface, and simultaneously feeds back the working state (rotation speed) of the fan 21 to the VCU1 through the PWM interface.
In the preferred embodiment, the control bus 7 is a CAN bus (controller ra network). VCU1, motor controller are provided with CAN bus communication interface respectively, and VCU1 passes through CAN bus and motor controller information interaction, and motor controller passes through CAN bus report temperature for VCU1, and VCU1 detects driving motor 4's temperature in real time.
Fig. 2 is a working flow chart of a control method of a driving motor heat dissipation system of the pure electric mining dump truck.
The control method of the driving motor heat dissipation system of the pure electric mining dump truck comprises the following specific steps:
step S1: the VCU1 checks whether the vehicle is in a starting state, if so, the step S2 is executed, otherwise, the step 3 is executed;
step S2: commanding the water pump 3 on the heat dissipation loop 5 to start working;
the VCU1 issues a command to the water pump controller through the PWM signal line, and the water pump controller controls the water pump 3 to start and start working.
Step S3: the VCU1 commands the water pump 3 on the heat dissipation loop 5 to stop working, the fan 21 of the radiator 2 stops working, and the flow is ended;
step S4: the VCU1 detects the temperature of the driving motor 4, and the VCU1 controls the fan 21 to change the rotation speed according to the steps in the set temperature interval, and keeps the rotation speed of the fan 21 unchanged when the driving motor 4 is at the critical temperature value.
The motor controller reports the current temperature value to the VCU1 through the CAN bus, the VCU1 judges whether the current temperature value is in a set temperature interval, the VCU1 sends a command to the fan controller through the PWM signal line, and the fan controller controls the fan 21 to operate at the set rotating speed or change the rotating speed according to steps.
The set temperature interval is a temperature interval between the head end critical temperature value and the tail end critical temperature value.
As shown in fig. 3, the rotation speed of the fan 21 is schematically changed along with the temperature of the driving motor 4 in the present invention.
In the present preferred embodiment, the set rotational speed of the fan 21 includes: the rotation speed of the fan 21 may be further divided as needed by a first speed (low speed=1200 rpm, rpm), a second speed (medium speed=2900 rpm, rpm), a third speed (high speed=4800 rpm, rpm), the first speed < the second speed < the third speed.
In the preferred embodiment, the threshold temperature value corresponds to the division of the set rotational speed, and includes: the first critical temperature value is less than the second critical temperature value and less than the third critical temperature value, the first critical temperature value is 70 ℃, the second critical temperature value is 95 ℃, and the third critical temperature value is 110 ℃. The rotation speed of the fan 21 at the critical temperature value is changed in a jump. At this time, among the first critical temperature value, the second critical temperature value, and the third critical temperature value, the first critical temperature value is used as the head critical temperature value, and the third critical temperature value is used as the tail critical temperature value.
The temperature hysteresis value is determined according to the temperature rising characteristic of the driving motor 4, when the driving motor 4 is at the critical temperature value through the temperature hysteresis value, the rotation speed of the fan 21 is kept unchanged, and the temperature point (which can be moved forwards or backwards) of the change of the rotation speed of the fan 21 is moved through the temperature hysteresis value, and in the preferred embodiment, the temperature hysteresis value is 5-10 ℃.
The VCU1 controls the rotating speed of the fan 21 in real time according to the temperature of the driving motor 4 to realize step-like change, wherein the temperature of the driving motor 4 is lower than 70 ℃ to be step one, and the fan stops rotating; the temperature of the motor is 70 ℃ or more and 95 ℃ or less, the motor is a step II, and the fan runs at a low speed; the temperature of the motor is more than or equal to 95 ℃ and less than 110 ℃ which is step three, and the fan runs at medium speed; the temperature of the motor is more than or equal to 110 ℃ and is step four, and the fan runs at high speed.
Step S41: the VCU1 determines whether the temperature of the driving motor 4 is greater than or equal to the first critical temperature value and less than the second critical temperature value, if yes, executing step S42, otherwise executing step S44;
step S42: the VCU1 judges whether the temperature of the driving motor 4 is less than the temperature of the second critical temperature value minus the temperature hysteresis value, or whether the fan 21 is in a stopped state; if yes, executing step S43, otherwise ending the flow;
the temperature at which the second critical temperature value 95 ℃ minus the temperature hysteresis value 10 ℃ is 85 ℃.
Step S43: VCU1 controls fan 21 to operate at a first speed;
VCU1 issues commands to the fan controller via PWM signal lines, which controls fan 21 to operate at a first speed.
Step S44: the VCU1 determines whether the temperature of the driving motor 4 is greater than or equal to the second critical temperature value and less than the third critical temperature value, if yes, executing step S45, otherwise executing step S47;
step S45: the VCU1 determines whether the temperature of the driving motor 4 is less than the temperature of the third critical temperature value minus the temperature hysteresis value, or whether the fan 21 is at the first speed; if yes, executing step S46, otherwise ending the flow;
the temperature at which the third critical temperature value 110 ℃ minus the temperature hysteresis value 5 ℃ is 105 ℃.
Step S46: VCU1 controls fan 21 to operate at a second speed;
step S47: the VCU1 determines whether the temperature of the driving motor 4 is greater than or equal to the third critical temperature value, if yes, executing step S48, otherwise executing step S49;
step S48: VCU1 controls fan 21 to operate at a third speed;
step S49: the VCU1 determines whether the temperature of the driving motor 4 is less than the temperature of the first critical temperature value minus the temperature hysteresis value, and if so, instructs the fan 21 to stop operating, otherwise, ends the flow.
The temperature at which the first critical temperature value of 70 ℃ minus the temperature hysteresis value of 10 ℃ is 60 ℃.
The temperature hysteresis value is 5-10 ℃, and the set temperature interval is 60-105 ℃, so that the fan 21 is avoided from oscillating at the critical temperature value when the rotation speed of the fan 21 is changed under the precondition that the driving motor 4 is ensured to normally operate within the critical temperature interval (the critical temperature interval is determined according to the rated operating condition of the driving motor 4, in the preferred embodiment, the temperature interval from the first critical temperature value to the third critical temperature value), the first critical temperature value is avoided to 70 ℃, the second critical temperature value is avoided to 95 ℃, and the third critical temperature value is ensured to be 110 ℃.
The method comprises the following steps: when the temperature value of the radiator 41 increases from 60 ℃ to 70 ℃, the fan 21 keeps stopping; when the temperature value is reduced from 85 ℃ to 70 ℃, the fan 21 keeps running at a low rotation speed to prevent the cooling fan 21 from widely fluctuating at the first critical temperature value, and the temperature hysteresis value of the rotation speed keeping method is generally determined according to the characteristics of the driving motor 4, and the recommended value is 10 ℃.
When the temperature value of the radiator 41 increases from 70 ℃ to 95 ℃, the fan 21 keeps running at a low rotation speed; when the temperature of the radiator 41 is reduced from 105 ℃ to 90 ℃, the fan 21 keeps rotating at a medium speed to prevent the fan 21 from widely fluctuating at the second critical temperature, and the temperature hysteresis value of the rotating speed keeping method is generally determined according to the characteristics of the driving motor 4, and the recommended value is 10 ℃.
When the temperature value of the radiator 41 increases from 100 ℃ to 110 ℃, the fan 21 keeps rotating at a medium speed; when the temperature value of the radiator 41 is reduced from 110 to 105, the fan 21 is kept in high rotation speed to prevent the fan 21 from widely fluctuating at the third critical temperature value, and the temperature hysteresis value of the rotation speed keeping method is generally determined according to the characteristic of the driving motor 4, and the recommended value is 5 ℃.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. The utility model provides a pure electric mining dump truck driving motor cooling system which characterized in that includes: the vehicle control unit VCU, the radiator, the water pump and the driving motor are arranged, the radiator is provided with a fan and a fan controller, the driving motor is provided with a heat exchanger and a motor controller, and the water pump is provided with a water pump controller; the water outlet of the heat exchanger is connected with the water inlet of the heat radiator through a heat dissipation pipeline; the VCU is respectively connected with the fan controller and the water pump controller through signal lines, the VCU is used for controlling the rotating speed of the fan and the starting and stopping of the water pump, the VCU and the motor controller are respectively connected with the control bus, and the VCU obtains the temperature value of the driving motor through the control bus.
2. The heat dissipation system for the driving motor of the pure electric mining dump truck according to claim 1, wherein the radiator, the water pump, the heat exchanger and the heat dissipation pipeline form a heat dissipation loop.
3. The heat dissipation system of the driving motor of the pure electric mining dump truck according to claim 1, wherein the VCU, the fan controller and the water pump controller are respectively provided with a PWM interface, the signal line is a pulse width modulation PWM signal line, and the VCU controls and controls the rotation speed of the fan and the start and stop of the water pump in a PWM manner.
4. The heat dissipation system for the driving motor of the pure electric mining dump truck according to claim 1, wherein the VCU and the motor controller are respectively provided with a controller area network bus communication interface, the controller area network bus is selected as the control bus, and the VCU interacts with the motor controller through the controller area network bus.
5. The control method for the driving motor heat dissipation system of the electric only mining dump truck according to any one of claims 1 to 4, characterized by comprising:
the VCU checks that the vehicle is in a starting state, and a water pump on a heat dissipation loop is in a working state;
the VCU detects the temperature of the driving motor, and controls the fan to change the rotating speed according to steps in a set temperature interval, wherein the set temperature interval is a temperature interval between a head end critical temperature value and a tail end critical temperature value; when the driving motor is at the critical temperature value, the rotating speed of the fan is kept unchanged.
6. The method for controlling a heat dissipation system of a driving motor of a pure electric mining dump truck according to claim 5, wherein the VCU checks whether the vehicle is in a starting state, if so, instructs a water pump on a heat dissipation circuit to start operating, otherwise, the VCU instructs the water pump on the heat dissipation circuit to stop operating, and a fan of the radiator stops operating.
7. The control method of the heat dissipation system of the driving motor of the pure electric mining dump truck according to claim 5, wherein the VCU issues a command to a water pump controller through a PWM signal line, and the water pump controller controls a water pump to start and start working; the motor controller reports the current temperature value to the VCU through the CAN bus, the VCU judges whether the current temperature value is in a set temperature range, the VCU sends a command to the fan controller through the PWM signal line, and the fan controller controls the fan to operate at the set rotating speed or change the rotating speed according to steps.
8. The control method of the heat dissipation system of the driving motor of the pure electric mining dump truck according to claim 5, wherein the fan rotation speed is kept unchanged when the driving motor is at a critical temperature value through a temperature hysteresis value, and the temperature hysteresis value is 5-10 ℃.
9. The method for controlling a heat dissipation system of a driving motor of a pure electric mining dump truck according to claim 5, wherein the set rotation speed of the fan comprises: the first speed is less than the second speed and less than the third speed; the critical temperature values are divided into a first critical temperature value, a second critical temperature value and a third critical temperature value, wherein the first critical temperature value is less than the second critical temperature value and less than the third critical temperature value; the VCU judges whether the temperature of the driving motor is larger than or equal to a first critical temperature value and smaller than a second critical temperature value, if so, the VCU judges whether the temperature of the driving motor is smaller than the temperature obtained by subtracting a temperature hysteresis value from the second critical temperature value or whether the fan is in a stop state, and if so, the VCU controls the fan to operate at a first speed; otherwise, the VCU continues to judge whether the temperature of the driving motor is larger than or equal to a second critical temperature value and smaller than a third critical temperature value, if so, the VCU judges whether the temperature of the driving motor is smaller than the temperature obtained by subtracting the temperature hysteresis value from the third critical temperature value or whether the fan is at a first speed, and if so, the VCU controls the fan to run at a second speed; otherwise, the VCU judges whether the temperature of the driving motor is greater than or equal to a third critical temperature value, and if so, the VCU controls the fan to run at a third speed; otherwise, the VCU judges whether the temperature of the driving motor is less than the temperature of the first critical temperature value minus the temperature hysteresis value, and if so, the VCU commands the fan to stop running.
10. The method for controlling a heat dissipation system for a drive motor of a mining pure electric dump truck according to claim 9, wherein the first speed is 1200rpm, the second speed is 2900rpm, the third speed is 4800rpm, the first critical temperature value is 70 ℃, the second critical temperature value is 95 ℃, and the third critical temperature value is 110 ℃.
CN202311378197.8A 2023-10-23 2023-10-23 Driving motor heat dissipation system of pure electric mining dump truck and control method Pending CN117400707A (en)

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CN202311378197.8A CN117400707A (en) 2023-10-23 2023-10-23 Driving motor heat dissipation system of pure electric mining dump truck and control method

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CN202311378197.8A CN117400707A (en) 2023-10-23 2023-10-23 Driving motor heat dissipation system of pure electric mining dump truck and control method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119388984A (en) * 2024-06-21 2025-02-07 中国重汽集团济南动力有限公司 A cooling system and control method for a new energy electric vehicle drive motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119388984A (en) * 2024-06-21 2025-02-07 中国重汽集团济南动力有限公司 A cooling system and control method for a new energy electric vehicle drive motor

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