WO2022224756A1 - 駆動部材制御装置 - Google Patents

駆動部材制御装置 Download PDF

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Publication number
WO2022224756A1
WO2022224756A1 PCT/JP2022/015635 JP2022015635W WO2022224756A1 WO 2022224756 A1 WO2022224756 A1 WO 2022224756A1 JP 2022015635 W JP2022015635 W JP 2022015635W WO 2022224756 A1 WO2022224756 A1 WO 2022224756A1
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WO
WIPO (PCT)
Prior art keywords
motor
temperature
control unit
amount
estimated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/015635
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English (en)
French (fr)
Japanese (ja)
Inventor
大侑 矢頭
豪 遠藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of WO2022224756A1 publication Critical patent/WO2022224756A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02P29/62—Controlling or determining the temperature of the motor or of the drive for raising the temperature of the motor

Definitions

  • the present disclosure relates to a drive member control device.
  • a drive member control device such as a power window control device that protects the motor by regulating the amount of power supplied to the motor when the estimated motor temperature reaches or exceeds a regulation value (for example, Patent Document 1 reference).
  • An object of the present disclosure is to provide a drive member control device capable of increasing the accuracy of an estimated motor temperature.
  • a driving member control device (2) controls a motor (M) that drives a driving member (1) and includes a control section (8) that estimates motor temperature.
  • the control unit calculates a calorific value according to at least one of the motor temperature estimated by the previous time and the ambient temperature, and estimates the motor temperature according to the calorific value.
  • the control unit calculates the amount of heat generated according to at least one of the previously estimated motor temperature and the ambient temperature. Compared to calculating the amount, the calorific value can be calculated with high accuracy. Therefore, the motor temperature can be estimated with high accuracy.
  • FIG. 1 is a schematic circuit diagram of a power window device in one embodiment
  • FIG. 2 is a flow diagram for explaining the temperature change amount calculation processing of the control unit in one embodiment
  • FIG. 3 is a characteristic diagram of rotation speed and current value with respect to torque in one embodiment
  • FIG. 4 is a characteristic diagram of calorific value with respect to rotation speed in one embodiment.
  • FIG. 1 An embodiment of a power window control device will be described below with reference to FIGS. 1 to 4.
  • a power window device 2 driving member control device
  • a window glass 1 driving member
  • a motor M is drivingly connected. The motor M drives the window glass 1 to open and close.
  • the power window device 2 includes a rotation detection sensor 3 such as a Hall IC that detects the rotational speed of the motor M.
  • the power window device 2 controls the duty ratio of the drive circuit 7 based on the signal from the rotation detection sensor 3, the signal from the operation switch 4, the signal from the temperature sensor 5, the voltage of the battery 6, and the like.
  • a control unit 8 for supplying a drive voltage to the motor M is provided.
  • the temperature sensor 5 of the present embodiment is, for example, an outside air temperature sensor for detecting the outside air temperature displayed on the vehicle display.
  • the controller 8 has a memory 9 .
  • the memory 9 stores various information including various preset threshold values.
  • the control unit 8 includes 1) one or more processors that execute various processes according to a computer program (software), and 2) an application specific integrated circuit (ASIC) that executes at least part of the various processes. It may be configured as circuitry including one or more dedicated hardware circuits, or 3) combinations thereof.
  • a processor includes a CPU and memory, such as RAM and ROM, which stores program code or instructions configured to cause the CPU to perform processes.
  • Memory or computer-readable media includes any available media that can be accessed by a general purpose or special purpose computer.
  • control unit 8 supplies power to the motor M to drive the window glass 1 to open and close. Also, the control unit 8 estimates the motor temperature based on each piece of information.
  • control unit 8 determines the motor temperature based on the ambient temperature, the drive voltage supplied to the motor M, the number of rotations of the motor M corresponding to the signal from the rotation detection sensor 3, and the elapsed time. presume. Note that the control unit 8 acquires the ambient temperature from the temperature sensor 5 for other uses. Specifically, the controller 8 of the present embodiment acquires the ambient temperature from the temperature sensor 5, which is an outside air temperature sensor for detecting the outside air temperature.
  • the control unit 8 calculates the amount of heat generated according to the motor temperature estimated up to the previous time, and estimates the motor temperature according to the amount of heat generated. Note that the control unit 8 of the present embodiment uses the motor temperature estimated immediately before as it is as the motor temperature estimated up to the last time, but is not limited to this. The value may be used as the previously estimated motor temperature.
  • the control unit 8 calculates the amount of heat generated so that the higher the motor temperature estimated up to the last time, the smaller the amount of heat generated. do. At this time, the controller 8 calculates the amount of heat generated based on the characteristics of the motor M as described below.
  • Fig. 3 is a characteristic diagram of the rotation speed and the current value with respect to the torque in the motor M.
  • characteristic K1 is the number of rotations when the motor temperature is 70°C
  • characteristic K2 is the number of rotations when the motor temperature is 25°C
  • characteristic K3 is the number of rotations when the motor temperature is -20°C.
  • the characteristic C1 is the current value when the motor temperature is 70°C
  • the characteristic C2 is the current value when the motor temperature is 25°C
  • the characteristic C3 is the motor temperature of -20°C. is the current value when As shown in FIG.
  • the motor M has a characteristic that when the number of revolutions is low, the current value decreases and the amount of heat generated decreases as the motor temperature increases.
  • the control unit 8 based on each data including the characteristics described above, determines that the higher the previously estimated motor temperature, the smaller the amount of heat generated. Calculate the calorific value as follows.
  • control unit 8 adds the calculated heat generation amount to the motor temperature estimated immediately before to estimate the latest motor temperature.
  • control unit 8 estimates the motor temperature to be the same as the ambient temperature acquired from the temperature sensor 5, for example, when the vehicle has been left for a long period of time.
  • control unit 8 limits the operation of the motor M based on the estimated motor temperature.
  • the control unit 8 of the present embodiment restricts new operation when the estimated motor temperature exceeds a preset new operation prohibition threshold. Further, when the estimated motor temperature exceeds a preset operation prohibition threshold, the control unit 8 stops the operation even in the middle of the operation.
  • control unit 8 performs the temperature change amount calculation process of step S1 and subsequent steps in each extremely short control period.
  • step S1 the control unit 8 determines whether or not the motor M is operating. If it determines that it is operating, it proceeds to step S2, and if it determines that it is not operating, it proceeds to step S3.
  • step S2 the control unit 8 determines whether or not the rotation speed of the motor M corresponding to the signal from the rotation detection sensor 3 is smaller than a preset rotation speed threshold. If it is determined that it is not smaller, the process moves to step S5.
  • step S4 the control unit 8 calculates the amount of heat generated based on the drive voltage supplied to the motor M, the rotation speed of the motor M corresponding to the signal from the rotation detection sensor 3, and the motor temperature estimated immediately before. do. At this time, the controller 8 calculates the amount of heat generated so that the higher the motor temperature estimated immediately before, the smaller the amount of heat generated.
  • step S ⁇ b>5 the controller 8 calculates the amount of heat generated based on the drive voltage supplied to the motor M and the number of rotations of the motor M corresponding to the signal from the rotation detection sensor 3 . Further, in step S ⁇ b>3 , the control unit 8 calculates the heat release amount based on the motor temperature estimated immediately before and the ambient temperature acquired from the temperature sensor 5 . At this time, when the motor temperature estimated immediately before is higher than the ambient temperature, the controller 8 calculates the amount of heat dissipation so that the larger the difference, the larger the amount of heat dissipation.
  • control unit 8 After completing the above-described temperature change amount calculation process, the control unit 8 adds the calculated amount of heat generation to the motor temperature estimated immediately before, or subtracts the calculated amount of heat dissipation from the motor temperature estimated immediately before to obtain the latest temperature. Estimate the motor temperature.
  • control unit 8 limits the operation of the motor M based on the estimated motor temperature. Thereby, for example, the motor M is protected from heat damage.
  • control unit 8 Since the control unit 8 calculates the amount of heat generated according to the previously estimated motor temperature, for example, compared to the case where the amount of heat generated is calculated regardless of the previously estimated motor temperature, the amount of heat generated is reduced. It can be calculated with high precision. Therefore, the motor temperature can be estimated with high accuracy.
  • the control unit 8 calculates the heat generation amount so that the heat generation amount decreases as the motor temperature estimated up to the previous time increases. , the calorific value can be calculated with high accuracy.
  • the motor M has a characteristic that when the number of revolutions of the motor M is small, the current value becomes smaller and the amount of heat generated becomes smaller as the motor temperature rises. Amount can be calculated. As a result, when the motor temperature is high, it is suppressed that the heat generation amount that is significantly larger than the actual heat generation amount is calculated, and it is suppressed that the estimated motor temperature is significantly higher than the actual motor temperature. can do.
  • the control unit 8 calculates the amount of heat generated according to the previously estimated motor temperature only when the rotation speed of the motor M is smaller than a preset rotation speed threshold, thereby easily and accurately calculating the heat generation amount. A calorific value can be calculated.
  • the estimated heat generation characteristic X1 can be brought close to the characteristic Z1 of the actual expected calorific value.
  • FIG. 4 is a characteristic diagram of the amount of heat generated with respect to the number of revolutions of the motor M.
  • the characteristic Z1 is the actual assumed amount of heat generated when the motor temperature is 70° C.
  • the characteristic Z2 is the actual assumed amount of heat generated when the motor temperature is 25° C.
  • the characteristic Z3 is the actual assumed amount of heat generated when the motor temperature is -20°C.
  • the characteristic X1 is estimated by the control unit 8 of the present embodiment when the number of revolutions of the motor M is smaller than the preset number of revolutions threshold value A and the motor temperature is 70°C. is the amount of heat generated. Further, in FIG.
  • the characteristic X2 is the amount of heat generated by the conventional control unit so that the motor M can be protected regardless of the motor temperature. That is, in order to protect the motor M regardless of the motor temperature, the conventional control unit estimates the amount of heat generated so as not to fall below the actual amount of heat generated when the motor temperature is -20°C.
  • the control unit 8 of the present embodiment operates when the rotational speed of the motor M is smaller than the preset rotational speed threshold value A and when the motor temperature is high. can bring the estimated calorific value closer to the actual calorific value. That is, the characteristic X1 estimated by the control unit 8 of the present embodiment has a value closer to the characteristic Z1 than the characteristic X2 estimated regardless of the motor temperature. In this way, it is possible to prevent the estimated motor temperature from becoming much higher than the actual motor temperature, and it is possible to prevent the operation of the motor M from being restricted early.
  • the controller 8 calculates the amount of heat generated according to the previously estimated motor temperature, but calculates the amount of heat generated according to at least one of the previously estimated motor temperature and the ambient temperature. do it.
  • the control unit 8 may calculate the amount of heat generated according to the ambient temperature regardless of the motor temperature estimated up to the last time. Specifically, when the rotation speed of the motor M is smaller than a preset rotation speed threshold, the control unit 8 may calculate the heat generation amount so that the higher the ambient temperature, the smaller the heat generation amount. good. Also, at this time, the control unit 8 preferably acquires the ambient temperature from the temperature sensor 5 for other purposes.
  • the temperature sensor 5 for other uses is not limited to the outside air temperature sensor, and may be a temperature sensor of a door ECU provided on the vehicle door D, for example.
  • the control unit 8 can calculate the heat generation amount with high accuracy. That is, when the number of revolutions of the motor M is low, the electrical resistance of the wiring increases and the current value decreases as the ambient temperature rises. It is possible to calculate the calorific value that takes into account the properties. As a result, when the ambient temperature is high, it is suppressed that the heat generation amount that is significantly larger than the actual heat generation amount is calculated, and it is suppressed that the estimated motor temperature is significantly higher than the actual motor temperature. can do. As a result, it is possible to prevent the operation of the motor M from being restricted early.
  • the controller 8 calculates the amount of heat generated according to the ambient temperature only when the number of revolutions of the motor M is smaller than the preset threshold number of revolutions, thereby easily and accurately calculating the amount of heat generated. be able to.
  • control unit 8 acquires the ambient temperature from the temperature sensor 5 for other purposes, a dedicated ambient temperature sensor is unnecessary compared to a configuration using a dedicated ambient temperature sensor for detecting the ambient temperature. As a result, the number of parts can be reduced.
  • control unit 8 may calculate the amount of heat generated according to the previously estimated motor temperature and ambient temperature. Specifically, when the rotation speed of the motor M is smaller than a preset rotation speed threshold value, the control unit 8 controls the ambient temperature so that the higher the motor temperature estimated up to the previous time, the smaller the amount of heat generated.
  • the calorific value may be calculated such that the higher the value, the smaller the calorific value.
  • the power window device 2 in which the drive member is the window glass 1 is embodied, but the present invention is not limited to this, and may be embodied in another drive member control device that drives another drive member.
  • references herein to "at least one of A and B" should be understood to mean “A only, or B only, or both A and B.”

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
PCT/JP2022/015635 2021-04-23 2022-03-29 駆動部材制御装置 Ceased WO2022224756A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-073583 2021-04-23
JP2021073583A JP2022167646A (ja) 2021-04-23 2021-04-23 駆動部材制御装置

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WO2022224756A1 true WO2022224756A1 (ja) 2022-10-27

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PCT/JP2022/015635 Ceased WO2022224756A1 (ja) 2021-04-23 2022-03-29 駆動部材制御装置

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008187858A (ja) * 2007-01-31 2008-08-14 Mitsuba Corp モータのコイル温度推定方法及びその方法を用いた開閉装置の制御方法及び開閉装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013146155A (ja) * 2012-01-16 2013-07-25 Toyota Motor Corp 巻線温度推定装置及び巻線温度推定方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008187858A (ja) * 2007-01-31 2008-08-14 Mitsuba Corp モータのコイル温度推定方法及びその方法を用いた開閉装置の制御方法及び開閉装置

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