WO2022057650A1 - Procédé et système de commande de température d'onduleur, véhicule et support - Google Patents

Procédé et système de commande de température d'onduleur, véhicule et support Download PDF

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Publication number
WO2022057650A1
WO2022057650A1 PCT/CN2021/116641 CN2021116641W WO2022057650A1 WO 2022057650 A1 WO2022057650 A1 WO 2022057650A1 CN 2021116641 W CN2021116641 W CN 2021116641W WO 2022057650 A1 WO2022057650 A1 WO 2022057650A1
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WIPO (PCT)
Prior art keywords
frequency
inverter
control module
torque
information
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PCT/CN2021/116641
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English (en)
Chinese (zh)
Inventor
李岩
李帅
陈晓娇
李伟亮
赵慧超
潘忠亮
范雨卉
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中国第一汽车股份有限公司
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Publication of WO2022057650A1 publication Critical patent/WO2022057650A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/60—Controlling or determining the temperature of the motor or of the drive
    • H02P29/68—Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • 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

Definitions

  • the present application relates to inverter technology, for example, to an inverter temperature control method, system, vehicle and medium.
  • Pure electric vehicles and hybrid vehicles have become the main forms of future vehicles due to their low pollution and emissions, and high fuel economy.
  • the power motors of pure electric vehicles and hybrid electric vehicles require high-power inverters to drive. Due to the characteristics of the inverter module itself, the temperature of the inverter rises rapidly when the motor is outputting at low speed and high torque. If it exceeds the safe working temperature of the inverter, it will not only affect the overall efficiency of the controller but also affect the inverter. The life and safety of the device are seriously affected.
  • the temperature rise of the inverter can be reduced by reducing the torque output of the motor.
  • this method can achieve the purpose of cooling the inverter, it also leads to a decrease in the power performance of the whole vehicle.
  • the present application provides an inverter temperature control method, system, vehicle and medium, so as to control the temperature of the inverter.
  • an inverter temperature control method which is applied to a temperature control system, the temperature control system comprising: a sensing module, a frequency control module, a power control module and a motor;
  • the method includes:
  • the sensing module obtains the rotational speed information of the motor; the frequency control module obtains the torque information of the motor; the power control module obtains the temperature information of the inverter;
  • the frequency control module determines the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information;
  • the frequency control module adjusts the frequency of the inverter to the target frequency to control the frequency of the inverter
  • the power control module controls the output frequency of the motor based on the target frequency to control the temperature of the inverter.
  • an inverter temperature control system comprising: a sensing module, a frequency control module, a power control module and a motor;
  • the sensing module is configured to obtain rotational speed information of the motor
  • the frequency control module is configured to obtain torque information of the motor
  • the power control module is configured to obtain temperature information of the inverter
  • the frequency control module is further configured to determine the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information;
  • the frequency control module is further configured to adjust the frequency of the inverter to the target frequency to control the frequency of the inverter
  • the power control module is further configured to control the output frequency of the motor based on the target frequency to control the temperature of the inverter.
  • Also provided is a vehicle comprising:
  • processors one or more processors
  • storage means arranged to store one or more programs
  • an inverter temperature control system configured to control the temperature of the inverter
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned inverter temperature control method.
  • FIG. 1 is a schematic structural diagram of a temperature control system for implementing a method for controlling the temperature of an inverter provided by the present application;
  • FIG. 2 is a flowchart of an inverter temperature control method according to Embodiment 1 of the present application
  • Fig. 3 is the partition diagram of inverter active frequency control
  • Fig. 5 is the inverter passive frequency switching diagram based on temperature information
  • FIG. 6 is a schematic diagram of inverter frequency switching according to driving mode changes
  • FIG. 7 is a schematic diagram of inverter active frequency partition switching
  • FIG. 8 is a schematic diagram of frequency hysteresis switching
  • FIG. 10 is a schematic structural diagram of a vehicle according to Embodiment 4 of the present application.
  • Some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as sequential processing, many of the operations may be performed in parallel, concurrently, or concurrently. Additionally, the order of multiple operations can be rearranged. The process may be terminated when multiple operations are completed, but may also have additional steps not included in the figures.
  • the processes may correspond to methods, functions, procedures, subroutines, subroutines, and the like. Furthermore, the embodiments in this application and features in the embodiments may be combined with each other without conflict.
  • FIG. 1 is a schematic structural diagram of a temperature control system for implementing an inverter temperature control method provided by the present application.
  • the temperature control system may include: a sensing module, a frequency control module, a power control module and a motor .
  • the sensing module may include a position sensor and a current sensor
  • the power control module may include a torque control module, a driving algorithm module and a power module.
  • the position sensor is electrically connected with the motor, the torque control module, the driving algorithm module and the frequency control module respectively; the current sensor is electrically connected with the motor and the torque control module respectively; the frequency control module is electrically connected with the position sensor, the driving algorithm module and the power module respectively.
  • the torque control module is respectively electrically connected with the position sensor, the current sensor and the driving algorithm module; the driving algorithm module is respectively electrically connected with the position sensor, the torque control module, the frequency control module and the power module; the power module is respectively connected with the driving algorithm module, the frequency control module and the power module.
  • the control module, the motor and the inverter are electrically connected; the motor is respectively electrically connected with the position sensor, the current sensor and the power module.
  • the position sensor can include a motor rotor sensor.
  • the motor rotor position sensor can be set to detect the position of the motor rotor, and can also be set to detect the rotational speed of the motor.
  • the motor rotor position sensor can include a resolver or other types of incremental encoders.
  • the position sensor; the current sensor may include a motor three-phase current sensor, which may be set to detect the three-phase current amplitude of the motor.
  • the torque control module can realize the closed-loop control of torque according to the received torque request command, and output 6-channel pulse width modulation (Pulse Width Modulation, PWM) duty cycle.
  • PWM Pulse Width Modulation
  • the frequency control module can determine the current frequency of the inverter according to the received torque request command, the speed information of the motor, the torque information of the motor and the temperature information of the inverter, etc. frequency control.
  • the drive algorithm module can output 6-way PWM drive signals that can drive the power control module according to the 6-way PWM duty cycle output by the torque control module.
  • the drive algorithm module can also output a fixed drive frequency according to the frequency command output by the frequency control module. .
  • the power module can control the motor to output a preset torque according to the received 6-channel PWM drive signals.
  • the power control module can also detect the real-time temperature information of the inverter and feed back the temperature information to the frequency control module.
  • the motor may include a drive motor, and the drive motor may include a permanent magnet synchronous motor, an AC asynchronous motor, a DC brushless motor, or an excitation motor.
  • FIG. 2 is a flowchart of an inverter temperature control method provided in Embodiment 1 of the present application. This embodiment can be applied to the situation that the inverter temperature is too high, resulting in a decrease in the power performance of the vehicle. This method can be controlled by a temperature control method.
  • the temperature control system may include: a sensing module, a frequency control module, a power control module and a motor.
  • the method may include the following steps.
  • Step 210 the sensing module acquires the rotational speed information of the motor.
  • the sensing module may include a motor rotor position sensor, which may be configured to detect the rotational speed of the motor and obtain rotational speed information of the motor.
  • Step 220 the frequency control module acquires torque information of the motor.
  • the frequency control module can obtain a torque request command, the torque request command can include torque information of the motor, and the torque information can include the torque of the motor running.
  • Step 230 The power control module acquires the temperature information of the inverter.
  • the power module may include a power module, the power module may include a temperature sensor, and the temperature sensor may acquire real-time temperature information of the inverter.
  • Step 240 The frequency control module determines the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information.
  • the motor When the speed of the motor is low and the torque is low, the motor can be controlled with a low carrier frequency, and when the speed of the motor is high, the motor can be controlled with a high carrier frequency.
  • Figure 3 is a partition diagram of the active frequency control of the inverter. As shown in Figure 3, the partition frequency control can be performed on the working conditions of the motor.
  • the target frequency of the inverter can be controlled to be the first carrier frequency, and the first carrier frequency can be the lowest carrier frequency in frequency control.
  • the rotational speed in this area can include 0 rpm to 50 rpm.
  • the rotational speed area is not strictly defined and can be determined according to different motor conditions.
  • the rotational speed in this area can be defined as if the rotational speed of the motor is in this area, it belongs to the rotational speed in this area.
  • the first carrier frequency may include 1.25 kHz, but the first carrier frequency is not limited to be 1.25 kHz.
  • the carrier frequency can be a fixed value, or it can be a very low carrier frequency value that varies with the rotational speed of the motor.
  • the motor When the motor is in the second area, that is, the low-speed and low-torque area, it may also include the area of common working conditions in urban areas, and the target frequency of the inverter can be controlled to be the second carrier frequency.
  • the rotational speed of the region may include a region of 100 rpm to 3500 rpm
  • the torque region may include a region between 0Nm torque and 40% of the maximum torque
  • the torque region may be defined as the torque of the motor in this region.
  • the second carrier frequency may include 4.2 kHz, but the second carrier frequency is not limited to be 4.2 kHz.
  • the carrier frequency may be a fixed value, or may be a lower carrier frequency value that varies with the rotational speed of the motor.
  • Motor torque can refer to the amount of force that is turned.
  • the torque of the motor is proportional to the strength of the rotating magnetic field and the current in the rotor cage, and is proportional to the square of the power supply voltage, so the torque can be determined by current and voltage.
  • the target frequency of the inverter can be controlled to be the third carrier frequency.
  • the regional rotation speed may be the same as the regional rotation speed of the second region, that is, the regional rotation speed may include a region of 100 rpm to 3500 rpm, and the torque region may include a region between 40% of the maximum torque and 80% of the maximum torque.
  • the third carrier frequency may include 6 kHz, but the third carrier frequency is not limited to be 6 kHz.
  • the carrier frequency may be a fixed value, or may be a lower carrier frequency value that varies with the rotational speed of the motor.
  • the target frequency of the inverter can be controlled to be the fourth carrier frequency.
  • the region rotational speed may include a region in excess of 3500 rpm, and the torque region may exceed an 80% maximum torque region.
  • the fourth carrier frequency may include 10 kHz, but the fourth carrier frequency is not limited to be 10 kHz.
  • the carrier frequency may be a fixed value, or may be a higher carrier frequency value that varies with the rotational speed of the motor.
  • the passive adjustment mode is activated, and the frequency of the inverter can be adjusted to The preset low frequency, if it is detected that the temperature of the inverter is lower than the second preset temperature, the frequency of the inverter can be adjusted to the preset high frequency.
  • Step 250 The frequency control module adjusts the frequency of the inverter to the target frequency, so as to control the frequency of the inverter.
  • the frequency control module can adjust the frequency of the inverter to the target frequency according to the difference between the current frequency and the target frequency.
  • the frequency control module can adjust the frequency of the inverter according to the target frequency determined above, so as to control the frequency of the inverter.
  • Step 260 The power control module controls the output frequency of the motor based on the target frequency to control the temperature of the inverter.
  • the power control module can determine the drive frequency of the motor according to the target frequency output by the frequency control module, so as to control the inverter.
  • the frequency of the inverter decreases, the loss of the inverter will decrease, the efficiency will increase, and the temperature of the inverter will decrease; when the frequency of the inverter increases, the loss of the inverter will increase, and the efficiency will decrease , and the temperature of the inverter will increase.
  • the temperature of the inverter can be changed by changing the frequency of the inverter without affecting the power output of the motor.
  • the speed information of the motor is acquired by the sensing module; the torque information of the motor is acquired by the frequency control module; the temperature information of the inverter is acquired by the power control module;
  • the rotational speed information, the torque information and the temperature information determine the target frequency of the inverter;
  • the frequency control module adjusts the frequency of the inverter to the target frequency, so as to realize the control of the inverter.
  • the power control module controls the output frequency of the motor based on the target frequency, realizes the control of the temperature of the inverter, and solves the change in the power of the vehicle caused by the temperature change of the inverter.
  • FIG. 4 is a flowchart of an inverter temperature control method according to Embodiment 2 of the present application. This embodiment is described on the basis of the above-mentioned embodiment. In this embodiment, the method may further include the following steps.
  • Step 410 the sensing module acquires the rotational speed information of the motor.
  • the sensing module may include a position sensor and a current sensor.
  • the position sensor can be set to detect the speed of the motor and obtain the speed information of the motor;
  • the current sensor can be set to detect the three-phase current amplitude of the motor.
  • the three-phase currents of the motor may include i u , i v and i w .
  • Step 420 the frequency control module acquires torque information of the motor.
  • Step 430 The power control module acquires the temperature information of the inverter.
  • the power control module may include a torque control module, a drive algorithm module, and a power module.
  • the power module can monitor the temperature of the inverter in real time and send the temperature information to the frequency control module.
  • Step 440 The frequency control module judges the rotational speed information, the torque information and the temperature information respectively according to the preset rotational speed, the preset torque and the preset threshold.
  • step 440 may include:
  • the frequency control module determines the current rotational speed based on the current rotational speed, the first rotational speed and the second rotational speed.
  • the rotational speed values or rotational speed regions of the first rotational speed and the second rotational speed may be determined according to different motor conditions.
  • the first rotational speed may include 0 rpm to 50 rpm
  • the second rotational speed may include 100 rpm to 3500 rpm.
  • the region in which the current rotational speed is located can be determined according to the above rotational speed range.
  • the frequency control module judges the current torque based on the current torque, the first torque and the second torque.
  • the torque values or torque regions of the first torque and the second torque may be determined according to different motor conditions.
  • the first torque may include 40% of the maximum torque
  • the second torque may include 80% of the maximum torque.
  • the region in which the current torque is located can be determined according to the above torque range.
  • the maximum torque which can also be called the stall torque
  • the torque that the motor can generate when the load is increased without causing a sudden drop in speed can be the maximum torque.
  • the maximum torque can be determined according to different operating conditions, and the minimum value of the maximum torque can be 1.6 to 2.5 times the rated torque.
  • the frequency control module judges the current temperature based on the current temperature, the first threshold and the second threshold.
  • the rotational speed information and torque information no longer play an active role in adjusting the frequency of the inverter, and passively control the frequency of the inverter based on the current temperature.
  • Figure 5 is a diagram of inverter passive frequency switching based on temperature information. As shown in Figure 5, if the current temperature is greater than the first threshold, the frequency of the inverter is controlled to be a lower carrier frequency; if the current temperature is less than the second threshold, Then the frequency of the control inverter is a higher carrier frequency.
  • Step 450 The frequency control module determines the target frequency of the inverter based on the judgment results of the rotational speed information, the torque information and the temperature information.
  • step 450 may include:
  • the frequency control module determines that the target frequency is the first carrier frequency.
  • the motor may be in the first region, and the target frequency is determined to be the first carrier frequency.
  • the frequency control module determines that the target frequency is less than or equal to the second carrier frequency.
  • the motor can be in the second region, and it is determined that the target frequency is less than or equal to the second carrier frequency.
  • the frequency control module determines that the target frequency is less than or equal to the third carrier frequency.
  • the motor can be in the third region, and it is determined that the target frequency is less than or equal to the third load frequency.
  • the frequency control module determines that the target frequency is greater than or equal to the fourth carrier frequency.
  • the motor may be in the fourth region, and it is determined that the target frequency is greater than or equal to the first rotational speed.
  • Four carrier frequencies are possible.
  • step 450 may further include:
  • the frequency control module determines the target frequency according to the comparison result between the preset low frequency and the current carrier frequency.
  • the inverter may be switched to the low frequency mode.
  • the target frequency can be determined according to the comparison result between the preset low frequency and the current carrier frequency.
  • the preset low frequency is determined as the target frequency; if the preset low frequency is greater than the current carrier frequency, the current carrier frequency is determined as the target frequency.
  • the frequency control module determines the target frequency according to the comparison result between the preset high frequency and the current carrier frequency.
  • the inverter can be switched to the high frequency mode.
  • the target frequency can be determined according to the comparison result between the preset high frequency and the current carrier frequency.
  • the preset high frequency is determined as the target frequency; if the preset high frequency is greater than the current carrier frequency, the current carrier frequency is determined as the target frequency.
  • the frequency of the inverter can also be actively adjusted and controlled according to the change of driving mode. Similar to traditional cars, new energy vehicles have driving modes such as comfort mode, sports mode, and energy-saving mode.
  • the frequency of the inverter can be changed according to the needs of the driving mode of the whole vehicle, and the active frequency conversion control method can adjust the frequency of the inverter according to different driving modes.
  • FIG. 6 is a schematic diagram of switching the frequency of the inverter according to the change of the driving mode.
  • the frequency curve of the control inverter is curve 1, that is, the lower frequency.
  • a lower frequency can improve the efficiency of the inverter and the cruising range of the vehicle; when the vehicle is in comfort mode or sports mode, the control accuracy and noise of the electric drive system (including the motor and inverter) are higher. requirements, so the frequency curve of the control inverter is curve 2, i.e. higher frequency.
  • the lower frequency and the higher frequency can use either a fixed value or a value that varies with the speed. In this embodiment, a lower frequency can use a value that varies with the rotational speed, and a higher frequency can use a fixed value.
  • the driving mode information may be input to the frequency control module, and the frequency control module determines the frequency of the inverter according to the input driving mode information.
  • Step 460 The frequency control module adjusts the frequency of the inverter to the target frequency based on the preset switching mode and the target frequency, so as to control the frequency of the inverter.
  • FIG. 7 is a schematic diagram of inverter active frequency partition switching, and the area enclosed by the dotted line shown in FIG. 7 is the switching area.
  • the rotational speed and torque are adjusted in the first area, the second area, the third area and the fourth area, so as to realize the adjustment of the frequency of the inverter.
  • FIG. 8 is a schematic diagram of frequency hysteresis switching
  • FIG. 9 is a schematic diagram of frequency linear switching.
  • the preset switching modes may include: hysteretic switching and linear switching.
  • the preset switching method can include hysteresis switching, when the speed or torque of the motor is higher than the second speed or the second torque, the frequency of the inverter is switched from a very low carrier frequency to a lower carrier frequency; When the rotational speed or torque is lower than the first rotational speed or the first torque, the frequency of the inverter is switched from a lower carrier frequency to an extremely low carrier frequency.
  • the preset switching mode can include linear switching, when the motor switches back and forth between the first region and the second region, the frequency of the inverter changes linearly between the first carrier frequency and the second carrier frequency; When switching back and forth between the second area and the third area, the frequency of the inverter changes linearly between the second carrier frequency and the third carrier frequency; when the motor switches back and forth between the third area and the fourth area , the frequency of the inverter changes linearly between the third carrier frequency and the fourth carrier frequency.
  • temperature switching can also be achieved by hysteresis switching or linear switching.
  • the temperature switching in FIG. 5 of this embodiment is hysteresis switching.
  • Step 470 The power control module controls the output frequency of the motor based on the target frequency, so as to control the temperature of the inverter.
  • the power control module may include a torque control module, a drive algorithm module and a power module, and the torque control module may be based on the torque request command T * e , the rotor position ⁇ r of the motor, the rotational speed ⁇ r of the motor, the three-phase current i u of the motor, i v and i w , output three PWM duty ratios T a , T b and T c ; the drive algorithm module can output 6 PWM drivers capable of driving the power module according to the 3 PWM duty ratios output by the torque control module The driving algorithm module can also output a fixed PWM driving frequency according to the frequency command output by the frequency control module; temperature control.
  • the speed information of the motor is obtained by the sensing module; the torque information of the motor is obtained by the frequency control module; the temperature information of the inverter is obtained by the power control module; and the preset threshold, respectively, to judge the speed information, torque information and temperature information; the frequency control module determines the target frequency of the inverter based on the judgment results of the speed information, torque information and temperature information; the frequency control module is based on the preset Switch the mode and target frequency, adjust the frequency of the inverter to the target frequency, and realize the control of the frequency of the inverter; the power control module controls the output frequency of the motor based on the target frequency, realizes the control of the temperature of the inverter, and solves the problem of reverse operation.
  • the temperature change of the inverter leads to the change of the power of the whole vehicle, and the effect of controlling the temperature change of the inverter without affecting the power of the whole vehicle is realized.
  • FIG. 1 is a structural diagram of an inverter temperature control system provided in the third embodiment of the application.
  • the system can be adapted to reduce the temperature rise of the inverter by reducing the torque output of the motor, resulting in a decrease in the power performance of the whole vehicle. Case.
  • the system can be implemented in software and/or hardware, integrated in the vehicle system.
  • the system includes: a sensing module, a frequency control module, a power control module and a motor, wherein,
  • the sensing module is configured to obtain rotational speed information of the motor
  • the frequency control module is configured to obtain torque information of the motor
  • the power control module is configured to obtain temperature information of the inverter
  • the frequency control module is further configured to determine the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information;
  • the frequency control module is further configured to adjust the frequency of the inverter to the target frequency, so as to control the frequency of the inverter;
  • the power control module is further configured to control the output frequency of the motor based on the target frequency, so as to control the temperature of the inverter.
  • the speed information of the motor is acquired by the sensing module; the torque information of the motor is acquired by the frequency control module; the temperature information of the inverter is acquired by the power control module;
  • the frequency control module determines the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information; the frequency control module adjusts the frequency of the inverter to the target frequency, Realize the control of the frequency of the inverter; the power control module controls the output frequency of the motor based on the target frequency, realizes the control of the temperature of the inverter, and solves the problem caused by the temperature change of the inverter.
  • the effect of controlling the temperature change of the inverter without affecting the vehicle power is achieved.
  • the frequency control module is set to:
  • the frequency control module judges the speed information, the torque information and the temperature information respectively according to the preset speed, the preset torque and the preset threshold;
  • the frequency control module determines the target frequency of the inverter based on the judgment results of the rotational speed information, the torque information and the temperature information.
  • a preset rotation speed, a preset torque and a preset threshold the rotation speed information, the torque information and the temperature information are respectively judged, which may include:
  • the frequency control module judges the current rotational speed based on the current rotational speed, the first rotational speed and the second rotational speed;
  • the frequency control module judges the current torque based on the current torque, the first torque and the second torque
  • the frequency control module determines the current temperature based on the current temperature, the first threshold and the second threshold.
  • determining the target frequency of the inverter based on the judgment results of the rotational speed information, the torque information and the temperature information may include:
  • the frequency control module determines that the target frequency is the first carrier frequency
  • the frequency control module determines that the target frequency is less than or equal to the second carrier frequency
  • the frequency control module determines that the target frequency is less than or equal to the third carrier frequency
  • the frequency control module determines that the target frequency is greater than or equal to the fourth load frequency.
  • determining the target frequency of the inverter based on the judgment results of the rotational speed information, the torque information and the temperature information may further include:
  • the frequency control module determines the target frequency according to the comparison result between the preset low frequency and the current carrier frequency
  • the frequency control module determines the target frequency according to the comparison result between the preset high frequency and the current carrier frequency.
  • the power control module is set to:
  • the frequency control module adjusts the frequency of the inverter based on the preset switching mode and the target frequency, so as to control the frequency of the inverter.
  • the preset switching manner includes: hysteresis switching and linear switching.
  • the inverter temperature control system provided by the embodiment of the present application can execute the inverter temperature control method provided by any embodiment of the present application, and has functional modules and effects corresponding to the execution method.
  • FIG. 10 is a schematic structural diagram of a vehicle according to Embodiment 4 of the application.
  • the vehicle includes a processor 1010, a memory 1020 and an inverter temperature control device 1030; the number of processors 1010 in the vehicle may be One or more, one processor 1010 is taken as an example in FIG. 10; the processor 1010, the memory 1020 and the inverter temperature control device 1030 in the vehicle can be connected through a bus or other means, and the connection through a bus is taken as an example in FIG. 10 .
  • the memory 1020 may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the inverter temperature control method in the embodiments of the present application (for example, the inverter Sensing module, frequency control module, frequency control module, power control module and motor in temperature control system).
  • the processor 1010 executes various functional applications and data processing of the vehicle by running the software programs, instructions and modules stored in the memory 1020 , that is, to implement the above-mentioned inverter temperature control method.
  • the memory 1020 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Additionally, memory 1020 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 1020 may include memory located remotely from processor 1010, which may be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
  • the inverter temperature control system can be configured to control the temperature of the inverter.
  • the vehicle provided by the embodiment of the present application can execute the inverter temperature control method provided by the above embodiment, and has corresponding functions and effects.
  • the fifth embodiment of the present application further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are used to execute an inverter temperature control method when executed by a computer processor, and the method can be executed by a temperature control system.
  • the temperature control system may include: a sensing module, a frequency control module, a power control module and a motor;
  • the method may include the following steps:
  • the sensing module obtains the rotational speed information of the motor
  • the frequency control module obtains torque information of the motor
  • the power control module obtains the temperature information of the inverter
  • the frequency control module determines the target frequency of the inverter according to the rotational speed information, the torque information and the temperature information;
  • the frequency control module adjusts the frequency of the inverter to the target frequency to control the frequency of the inverter
  • the power control module controls the output frequency of the motor based on the target frequency to control the temperature of the inverter.
  • a storage medium containing computer-executable instructions provided by an embodiment of the present application the computer-executable instructions are not limited to the above-mentioned method operations, and can also execute any of the inverter temperature control methods provided by any embodiment of the present application. related operations.
  • the present application can be implemented by software and general hardware, and can also be implemented by hardware.
  • the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a floppy disk of a computer, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory) , RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments of the present application.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • the multiple units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized;
  • the names of the functional units are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

Sont divulgués un procédé et un système de commande de température d'onduleur, un véhicule et un support. Le procédé de commande de température d'onduleur consiste : à acquérir, par un module de détection, des informations de vitesse de rotation d'un moteur électrique ; à acquérir, par un module de commande de couple, des informations de couple du moteur électrique ; à acquérir, par un module de commande de puissance, des informations de température d'un onduleur ; à déterminer, par un module de commande de fréquence, une fréquence cible de l'onduleur en fonction des informations de vitesse de rotation, des informations de couple et des informations de température ; à régler, par le module de commande de fréquence, la fréquence de l'onduleur sur la fréquence cible, de manière à commander la fréquence de l'onduleur ; et à commander, par le module de commande de puissance, une fréquence de sortie du moteur électrique en fonction de la fréquence cible, de façon à commander la température de l'onduleur.
PCT/CN2021/116641 2020-09-18 2021-09-06 Procédé et système de commande de température d'onduleur, véhicule et support WO2022057650A1 (fr)

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