WO2020226128A1 - Dispositif de mesure de la température - Google Patents

Dispositif de mesure de la température Download PDF

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Publication number
WO2020226128A1
WO2020226128A1 PCT/JP2020/018325 JP2020018325W WO2020226128A1 WO 2020226128 A1 WO2020226128 A1 WO 2020226128A1 JP 2020018325 W JP2020018325 W JP 2020018325W WO 2020226128 A1 WO2020226128 A1 WO 2020226128A1
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WO
WIPO (PCT)
Prior art keywords
temperature
rotor
temperature sensor
measuring device
tire
Prior art date
Application number
PCT/JP2020/018325
Other languages
English (en)
Japanese (ja)
Inventor
大暉 佐藤
Original Assignee
株式会社デンソー
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2020226128A1 publication Critical patent/WO2020226128A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/20—Devices for measuring or signalling tyre temperature only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby

Definitions

  • the present disclosure relates to a device for measuring the temperature of the rotor of a motor.
  • Some temperature sensors that measure the temperature of the motor are configured as follows.
  • the temperature sensor is installed on the inner surface of the motor housing. Then, by measuring the radiant heat emitted from the rotor, the temperature of the rotor is measured without contacting the rotor.
  • Patent Document 1 is available as a document showing such a technique.
  • the temperature of the rotating rotor can be measured. Based on the temperature, it can be determined whether or not the output of the motor is excessive. As a result, the reliability of the motor can be ensured by avoiding the application of excessive torque and the like.
  • the rotor rotates relative to the temperature sensor, so the temperature sensor cannot always measure the temperature of the same part of the rotor. Therefore, it is difficult to accurately measure the temperature of the rotor and accurately grasp the tendency of the temperature change of the rotor.
  • the present disclosure has been made in view of the above circumstances, and its main purpose is to enable accurate acquisition of the rotor temperature and the tendency of the rotor temperature change.
  • the temperature measuring device of the present disclosure measures the temperature of the rotor of a motor having a rotor and a stator.
  • the rotor is rotatably provided around a predetermined axis and is attached with a permanent magnet.
  • a coil is attached to the stator.
  • the motor causes the rotor to generate torque around the axis by the cooperation of the permanent magnet and the coil.
  • the temperature measuring device has a temperature sensor, a transmitting unit, and a receiving unit.
  • the temperature sensor is fixed to the rotor or a rotating body rotating with the rotor, and measures the temperature of a predetermined portion of the rotor.
  • the transmission unit is fixed to the rotor or a rotating body that rotates with the rotor, acquires temperature information that is information about the temperature from the temperature sensor, and transmits the temperature information to the outside of the rotor.
  • the receiving unit is installed outside the rotor in a state where it does not rotate together with the rotor, and receives the temperature information transmitted by the transmitting unit.
  • the temperature sensor since the temperature sensor is fixed to the rotor or a rotating body that rotates with the rotor, it does not rotate relative to the rotor. Therefore, even if the rotor rotates, the temperature sensor can accurately measure the temperature of the rotor. Further, since the temperature sensor always measures the temperature of the same portion of the rotor, it is possible to accurately grasp the tendency of the temperature change of the rotor as compared with the case where the measurement point of the rotor changes. Then, by transmitting the temperature information to the receiving unit outside the rotor by the transmitting unit, the temperature information can be taken out to the outside of the rotor. The motor can be controlled accurately based on the temperature information.
  • FIG. 1 is a schematic view showing a temperature measuring device and its surroundings in the first embodiment.
  • FIG. 2 is a cross-sectional view of tires, motors, etc. as viewed in the traveling direction of the vehicle.
  • FIG. 3 is a cross-sectional view of the tire, the motor, and the like viewed outward in the axial direction.
  • FIG. 4 is a cross-sectional view of the rim, the temperature sensor, and the valve member as viewed in the axial direction.
  • FIG. 5 is a graph showing the relationship between each position on the rotor and the temperature.
  • FIG. 6 is a cross-sectional view of the tire, the motor, and the like viewed outward in the axial direction in the second embodiment.
  • FIG. 7 is a cross-sectional view showing a propeller, a motor, and the like in the third embodiment.
  • FIG. 1 is a schematic view showing the temperature measuring device of the present embodiment and its surroundings.
  • the vehicle 90 has a vehicle body 91, four tires 60, and two motors 20.
  • the two motors 20 are in-wheel motors installed inside each of the left and right tires 60 on the front side, and drive the tires 60 corresponding to themselves independently of the other three tires 60.
  • each tire 60 is a normal pneumatic tire.
  • the vehicle 90 has a control unit 10 for controlling the motor 20, a tire pressure monitoring system 70 (TPMS) for monitoring the air pressure of the tire 60, and a temperature measuring device 80 for measuring the temperature of the motor 20.
  • the tire pressure monitoring system 70 includes an air pressure sensor 72, a transmission unit 73, a reception unit 76, and a display unit 77.
  • the transmitting unit 73 and the receiving unit 76 also form a part of the temperature measuring device 80.
  • the temperature measuring device 80 includes a temperature sensor 82 and an estimating unit 87 in addition to the transmitting unit 73 and the receiving unit 76.
  • FIG. 2 is a cross-sectional view of the front right tire 60 shown in FIG. 1, the wheel 50 and the motor 20 on the inner peripheral side thereof, and the like as viewed in the traveling direction of the vehicle 90.
  • a wheel 50 is installed on the inner peripheral side of the tire 60.
  • the wheel 50 has a disc portion 52 and a rim portion 56.
  • the rim portion 56 is a cylindrical member and is installed on the inner peripheral side of the tire 60.
  • a disc portion 52 is provided on the inner peripheral side of the rim portion 56.
  • the disk portion 52 is fitted and fixed to a shaft portion 41 described later, and has a plurality of spoke portions that extend radially from the hub portion 53 and connect the hub portion 53 and the rim portion 56. It has 54 and.
  • the motor 20 has a stator 30 and a rotor 40.
  • the stator 30 has a cylindrical support 33.
  • the rotor 40 has a shaft portion 41, a supported portion 42, a connecting portion 43, and an outer rotor portion 45.
  • the shaft portion 41 is rotatably installed around its own axis X on the inner peripheral side of the support portion 33.
  • the supported portion 42 is a cylindrical portion whose inner diameter is substantially equal to the outer diameter of the shaft portion 41 and whose outer diameter is slightly smaller than the inner diameter of the support portion 33, and is externally fitted and fixed to the shaft portion 41. ..
  • a bearing 23 is interposed between the outer peripheral surface of the supported portion 42 and the inner peripheral surface of the supported portion 33.
  • the supported portion 42 is rotatably supported by the supporting portion 33 via the bearing 23.
  • Each member constituting the rotor 40 that is, the shaft portion 41, the supported portion 42, the connecting portion 43, and the outer rotor portion 45, is integrated with the wheel 50 and the tire 60 and rotates around the axis X.
  • the outer rotor portion 45 is a cylindrical portion whose inner diameter is slightly larger than the outer diameter of the support portion 33, and is externally fitted with a gap to the support portion 33.
  • the connecting portion 43 is a disk-shaped portion that connects the end of the supported portion 42 in the axial direction outer Db and the end of the outer rotor portion 45 in the axial direction outer Db, and is fixed to the disk portion 52. There is.
  • FIG. 3 is a view showing a cross section of lines III-III shown in FIG. 2, that is, a cross-sectional view of the tire 60, the wheel 50, the motor 20, and the like as viewed from the outer Db in the axial direction.
  • a plurality of permanent magnets 44 are provided on the inner peripheral edge of the outer rotor portion 45 at intervals in the circumferential direction.
  • a coil 34 is installed on the outer peripheral edge of the support portion 33. Then, due to the cooperation between the permanent magnet 44 and the coil 34, a torque around the axis X is generated in the rotor 40, and the rotor 40, the wheel 50, and the tire 60 rotate integrally.
  • the tire pressure monitoring system 70 includes a valve member 74.
  • the valve member 74 includes an air valve 71, the above-mentioned air pressure sensor 72, and a transmission unit 73.
  • the valve member 74 is fixed to the rim portion 56. Therefore, the valve member 74 rotates together with the tire 60, the wheel 50, and the rotor 40.
  • the air valve 71 is installed so as to project from the inside of the tire 60 to the outer Db in the axial direction, and is configured so that air can be sucked into the tire 60.
  • the air pressure sensor 72 and the transmission unit 73 are installed on the outer peripheral surface of the rim unit 56, that is, in the tire 60.
  • the air pressure sensor 72 measures the air pressure of the tire 60 and transmits the air pressure information IP, which is information on the air pressure, to the transmission unit 73.
  • the transmission unit 73 wirelessly transmits the air pressure information iP to the outside of the rotating unit including the rotor 40, the wheel 50, and the tire 60.
  • the air pressure information iP may be information indicating whether or not the air pressure is higher than a predetermined value, that is, information indicating whether or not the air pressure is normal, or information indicating whether or not the air pressure itself is normal. When the information indicates the air pressure itself, the receiving side determines whether or not the air pressure is normal.
  • the temperature measuring device 80 includes the temperature sensor 82 and the transmitting unit 73 described above, and a communication line 83 connecting them.
  • the temperature sensor 82 is attached at a position facing the outer peripheral surface of the outer rotor portion 45 on the inner peripheral surface of the rim portion 56.
  • the temperature sensor 82 measures the radiant heat (that is, infrared rays) radiated from the outer rotor portion 45. Therefore, the temperature sensor 82 is a non-contact type sensor that measures the temperature of the outer rotor portion 45 without contacting the outer rotor portion 45.
  • the communication line 83 connects the temperature sensor 82 and the transmission unit 73 so as to be communicable.
  • the communication line 83 passes through the inside of the valve member 74 from the temperature sensor 82 side and is connected to the transmission unit 73 without penetrating the rim portion 56 in the radial direction of the tire 60.
  • the temperature sensor 82 transmits the temperature information iT, which is the acquired temperature information, to the transmission unit 73 via the communication line 83.
  • the transmission unit 73 wirelessly transmits the temperature information iT to the outside of the rotating unit including the rotor 40, the wheel 50, and the tire 60.
  • the installation position of the temperature sensor 82 will be described.
  • the length direction of the axis X will be referred to as the “axis direction”.
  • the direction on the vehicle body 91 side in the axial direction is referred to as “inward Da in the axial direction”
  • the opposite direction is referred to as “outward Db in the axial direction”.
  • the axial range from the end surface 52a of the axial inner Da of the disc portion 52 to the end 60a of the axial inner Da at the contact portion between the tire 60 and the rim portion 56 is defined as the "first range R1". ..
  • the temperature sensor 82 is arranged so as to fall within the first range R1 in the axial direction (Da, Db).
  • the outer rotor portion 45 is installed so as to extend inward Da in the axial direction from the disc portion 52. Therefore, if the length of the inner Da in the axial direction of the outer rotor portion 45 is short, the end 45a of the inner Da in the axial direction of the outer rotor portion 45 is in the axial direction than the end 56a of the inner Da in the axial direction of the rim portion 56.
  • the inner peripheral surface of the rim portion 56 near the end 56a of the inner Da in the axial direction does not face the outer peripheral surface of the outer rotor portion 45.
  • the temperature sensor 82 is arranged as described above, even if the temperature sensor 82 is arranged inward Da in the axial direction from the first range R1, even if the outer rotor portion 45 is arranged on the axis. Even if it is small in the direction inward Da, it becomes easy to face the outer peripheral surface of the outer rotor portion 45. Therefore, it becomes easy to correspond to the outer rotor portion 45 of each size. Further, as compared with the case where the temperature sensor 82 is arranged in the axial direction inner Da than the first range R1, the temperature sensor 82 has entered the axial outer Db through the opening of the axial inner Da of the wheel 50. This is because it is arranged at the position, so that the influence of the disturbance caused by the air flowing in from the opening can be suppressed.
  • all of the temperature sensors 82 are arranged so as to be within the first range R1. This is because the above effect can be obtained more remarkably.
  • the range on the outer Db side in the axial direction in the two ranges in which the first range R1 is bisected in the axial direction (Da, Db) is referred to as the "second range R2". More preferably, in the axial direction (Da, Db), the temperature sensor 82 is arranged so that at least a part thereof falls within the second range R2. More preferably, in the axial direction (Da, Db), the temperature sensors 82 are all arranged so as to fall within the second range R2. This is because the above effect can be obtained more remarkably. Therefore, in the present embodiment, all of the temperature sensors 82 are arranged so as to fall within the second range R2 in the axial direction (Da, Db).
  • first position p1 the position of the outer rotor portion 45 facing the air pressure sensor 72
  • second position p2 the intersection of the virtual straight line L connecting the first position p1 and the axis X and the end face on the outer peripheral side of the permanent magnet 44
  • third position p3 the intersection of the virtual straight line L and the end surface of the permanent magnet 44 on the inner peripheral side
  • the temperature sensor 82 measures the first temperature T1, which is the temperature of the first position p1. Based on the first temperature T1, the estimation unit 87 described later estimates the second temperature T2, which is the temperature of the second position p2, and the third temperature T3, which is the temperature of the third position p3.
  • FIG. 4 is a cross-sectional view of the rim portion 56, the valve member 74, and the temperature sensor 82 as viewed from the outer Db in the axial direction.
  • the virtual straight line connecting the center of gravity of the valve member 74 and the axis X when viewed from the outer Db in the axial direction is referred to as “valve line L1”.
  • the virtual straight line connecting the center of gravity of the temperature sensor 82 and the axis X when viewed from the outer Db in the axial direction is referred to as the “temperature sensor line L2”.
  • the angle ⁇ formed by the valve wire L1 and the temperature sensor wire L2 is preferably 10 ° or less. This is because the center of gravity of the temperature sensor 82 is located near the center of gravity of the valve member 74, so that the change in the position of the center of gravity of the rim portion 56 or the like due to the installation of the temperature sensor 82 can be suppressed. Further, by arranging the temperature sensor 82 near the valve member 74, it becomes easy to connect the temperature sensor 82 to the transmission unit 73 of the valve member 74. In order to obtain such an effect more remarkably, the above angle ⁇ is preferably 5 ° or less. Therefore, in the present embodiment, the angle ⁇ is 5 ° or less. In FIG.
  • the temperature sensor 82 and the valve member 74 are exaggerated and shifted in the circumferential direction in order to show the angle ⁇ , but in reality, the temperature sensor 82 and the valve member 74 are shown in the circumferential direction. The deviation to is smaller than that shown in the figure.
  • the receiving unit 76, the display unit 77, the estimating unit 87, and the control unit 10 are installed in the vehicle body 91. Therefore, unlike the air pressure sensor 72, the temperature sensor 82, and the transmission unit 73, they do not rotate together with the tire 60, the wheel 50, and the rotor 40.
  • the air pressure sensor 72 transmits the air pressure information iP
  • the temperature sensor 82 transmits the temperature information iT to the transmission unit 73, respectively.
  • the transmission unit 73 wirelessly transmits the air pressure information iP and the temperature information iT to the outside of the rotating unit.
  • the receiving unit 76 receives the wirelessly transmitted air pressure information iP and temperature information iT and transmits them to the display unit 77 and the estimation unit 87.
  • the display unit 77 notifies the driver or the like by displaying that the air pressure of the tire 60 is abnormal.
  • the estimation unit 87 acquires the first temperature T1 from the temperature information iT received from the reception unit 76, and estimates the second temperature T2 and the third temperature T3 based on the first temperature T1. The details of the estimation method will be described later.
  • the estimation unit 87 transmits the estimated second temperature T2 and third temperature T3 to the control unit 10.
  • the control unit 10 controls the motor 20 based on the second temperature T2 and the third temperature T3. Specifically, for example, when the second temperature T2 or the third temperature T3 is larger than a predetermined value, the output of the motor 20 is limited.
  • FIG. 5 is a graph showing the temperature (T) at each portion ( ⁇ ) of the outer rotor portion 45. With reference to this graph, a method of estimating the second temperature T2 and the third temperature T3 from the above first temperature T1 will be described.
  • the estimation unit 87 has, for example, a map showing the relationship between the first temperature T1 and the second temperature T2 and the third temperature T3, and based on the map and the first temperature T1, a first The two temperature T2 and the third temperature T3 may be estimated.
  • the estimation unit 87 acquires the heat flux q in the path from the first position p1 to the third position p3 in the outer rotor unit 45 through the second position p2, and the heat flux q and the first temperature T1. Therefore, the second temperature T2 and the third temperature T3 may be estimated. Specifically, it is as follows.
  • the length from the first position p1 to the second position p2 is referred to as the "first length ⁇ 1".
  • the length from the second position p2 to the third position p3 is defined as the “second length ⁇ 2”.
  • the thermal conductivity in the section from the first position p1 to the second position p2 is defined as "first thermal conductivity ⁇ 1”.
  • the thermal conductivity in the section from the second position p2 to the third position p3 is defined as "second thermal conductivity ⁇ 2".
  • the second temperature T2 and the third temperature T3 are expressed by the following equation 1.
  • the estimation unit 87 has the respective values of the first thermal conductivity ⁇ 1, the second thermal conductivity ⁇ 2, the first length ⁇ 1, and the second length ⁇ 2 as data. Therefore, if the heat flux q can be obtained, the heat flux q, the measured first temperature T1, and each of the above values ( ⁇ 1, ⁇ 2) held as data are displayed on the upper side of the above equation 1.
  • the second temperature T2 can be obtained by substituting into the equation of. Further, the heat flux q, the measured first temperature T1, and each of the above values ( ⁇ 1, ⁇ 2, ⁇ 1, ⁇ 2) held as data are substituted into the lower equation of the above equation 1. As a result, the third temperature T3 can be obtained.
  • the heat flux q can be estimated from, for example, the heat input entering the motor 20 and the heat output exiting the motor 20.
  • the heat input can be estimated from, for example, the power consumption of the motor 20.
  • the heat output can be estimated from, for example, copper loss, iron loss, mechanical loss, endothermic reaction by the cooling medium, temperature of the stator 30, residual magnetic flux density, and the like.
  • the second temperature T2 and the third temperature T3 can be obtained by estimating the heat flux q from the estimated heat input and heat output.
  • the temperature measuring device 80 can be adopted for the rotor 40 of the motor 20 that drives the tire 60 of the vehicle 90. Further, since the temperature sensor 82 is fixed to the rim portion 56, it does not rotate relative to the outer rotor portion 45. Therefore, the first temperature T1 can be measured accurately.
  • the transmission unit 73 rotates relative to the reception unit 76, the air pressure information iP and the temperature information iT are wirelessly transmitted to the reception unit 76. Therefore, unlike the case where the air pressure information iP and the temperature information iT are transmitted by wire, the transmission unit 73 does not need to provide a sliding connector (brush) or the like for allowing relative rotation to escape in the middle of the wire. And the temperature information iT can be transmitted to the receiving unit 76.
  • the temperature sensor 82 is attached to the rim portion 56 instead of the outer rotor portion 45, which tends to generate heat because the permanent magnet 44 is installed and is close to the coil 34, the temperature of the outer rotor portion 45 is difficult to be transmitted. Therefore, the risk of failure of the temperature sensor 82 due to the temperature of the outer rotor portion 45 can be suppressed. Further, if the temperature sensor 82 is attached to the outer peripheral surface of the outer rotor portion 45, the temperature sensor 82 may be detached from the outer peripheral surface due to centrifugal force. In that respect, since the temperature sensor 82 is attached to the inner peripheral surface of the rim portion 56, there is no concern that the temperature sensor 82 will come off to the outside due to centrifugal force.
  • the temperature measuring device 80 transmits the temperature information iT to the outside of the rotor 40 by using the transmitting unit 73 of the tire pressure monitoring system 70, it is not necessary to have the transmitting unit 73 independently, and the configuration is simple. Become. Further, since the temperature sensor 82 is located inside the wheel 50, the influence of disturbance is small. Further, since the transmission unit 73 is inside the tire 60, it is not easily damaged.
  • the estimation unit 87 since the estimation unit 87 is provided, the temperature of the permanent magnet 44 can be estimated even when the temperature of the permanent magnet 44 is not directly measured as in the case of the present embodiment.
  • FIG. 6 is a cross-sectional view of the tire 60 and the motor 20 as viewed outward from the axial direction Db in the second embodiment.
  • the "temperature sensor 82" referred to in the first embodiment is the first temperature sensor 82 in the present embodiment, and the outer peripheral portion of the support portion 33 has a second temperature for measuring the temperature of the inner peripheral surface of the outer rotor portion 45.
  • a sensor 88 is provided.
  • the second temperature sensor 88 is also a non-contact type sensor like the first temperature sensor 82. Since the inner peripheral surface of the outer rotor portion 45 rotates relative to the second temperature sensor 88, the second temperature sensor 88 can measure the temperature of the same portion of the inner peripheral surface of the outer rotor portion 45. Instead, the average temperature of the entire circumference of the inner peripheral surface of the outer rotor portion 45 is measured.
  • the second temperature sensor 88 transmits information about the measured temperature to the estimation unit 87.
  • the estimation of the second temperature T2 by the estimation unit 87 of the present embodiment will be described with reference to FIG. 5 again.
  • the estimation unit 87 estimates the third temperature T3 based on the temperature of the inner peripheral surface of the outer rotor unit 45 measured by the second temperature sensor 88.
  • the second temperature T2 is estimated based on the third temperature T3 and the measured first temperature T1 and the like.
  • the details are as follows. By eliminating q by the above two equations of equation 1 to make one equation, the following equation of equation 2 is obtained.
  • the estimation unit 87 uses the values of the first thermal conductivity ⁇ 1, the second thermal conductivity ⁇ 2, the first length ⁇ 1, and the second length ⁇ 2 as data as in the case of the first embodiment. have. Therefore, by substituting each of these values ( ⁇ 1, ⁇ 2, ⁇ 1, ⁇ 2), the measured first temperature T1, and the estimated third temperature T3 into the above equation of equation 2, the second The temperature T2 can be determined.
  • the temperature measurement timings of the first temperature sensor 82 and the second temperature sensor 88 overlap at least a part of the temperature measurement timings. This is because the second temperature T2 can be estimated more accurately by measuring at the same timing.
  • the second temperature sensor 88 is preferably not deviated in the axial direction (Da, Db) with respect to the first temperature sensor 82, but can be implemented even if the second temperature sensor 88 is deviated in the axial direction (Da, Db).
  • the second temperature sensor 88 measures the temperature of the inner peripheral surface of the outer rotor portion 45 to estimate the third temperature T3. Therefore, the second temperature T2 can be estimated without using a map or estimating the heat flux q. Further, the temperature of the permanent magnet 44 can be estimated more accurately by not only measuring the first temperature T1 but also measuring the temperature of the inner peripheral surface of the outer rotor portion 45.
  • FIG. 7 is a cross-sectional view of the motor 20 and the like in the third embodiment as viewed in a direction orthogonal to the axial direction (Da, Db).
  • the motor 20 is not an in-wheel motor that drives the tire 60 of the vehicle 90, but a propeller 69 of a manned or unmanned aerial vehicle 100 such as a helicopter or a drone.
  • the propeller 69 is connected to the shaft portion 41 of the motor 20, and the propeller 69 rotates together with the rotor 40.
  • a protrusion 59 that protrudes toward the outer periphery of the outer rotor portion 45 is attached to the rotor 40, and the temperature sensor 82 and the transmission portion 73 are attached to the protrusion 59.
  • the temperature sensor 82 and the transmission unit 73 are connected by wire so as to be able to communicate with each other.
  • the transmission unit 73 wirelessly transmits the temperature information iT to the reception unit outside the rotor 40.
  • the temperature measuring device 80 can also be implemented for the motor 20 of the flying object 100.
  • the above embodiment can be modified and implemented as follows, for example.
  • the transmission unit 73 may transmit each information to the reception unit 76 by wire instead of wirelessly.
  • the temperature measuring device 80 may have its own transmission unit 73 in addition to the transmission unit 73 of the tire pressure monitoring system 70.
  • the temperature sensor 82 may not be a non-contact type sensor but a contact type sensor directly attached to the outer rotor portion 45. Further, the temperature sensor 82 does not measure the temperature of a portion of the outer rotor portion 45 other than the permanent magnet, but may directly measure the temperature of the permanent magnet 44. Further, in the second embodiment, the second temperature sensor 88 may not be a non-contact type sensor but a contact type sensor directly attached to the inner peripheral portion of the outer rotor portion 45.
  • the motor 20 may be provided not for each of the two tires 60 on the front side but for each of the two tires 60 on the rear side, or for each of the four tires. It may be provided for the tire 60. Further, in the first and second embodiments, the tire 60 is a non-pneumatic tire and may not have the air pressure sensor 72 and the display unit 77.
  • the flying object 100 may be an unmanned aerial vehicle or a manned aerial vehicle having wings instead of a drone or the like. Then, the propeller 69 may drive the flying object 100 forward.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Radiation Pyrometers (AREA)

Abstract

La présente invention concerne un dispositif de mesure de température (80), destiné à mesurer la température d'un rotor (40) dans un moteur (20), qui comprend un capteur de température (82), une unité de transmission (73) et une unité de réception (76). Le capteur de température (82) est fixé au rotor (40) ou à un corps rotatif (56) qui tourne conjointement avec celui-ci et mesure la température d'une zone prescrite (p1) sur le rotor (40). L'unité de transmission (73) est fixée au rotor (40) ou au corps rotatif (56) qui tourne conjointement avec celui-ci et acquiert des informations de température (iT) en provenance du capteur de température (82) et transmet ces informations à l'extérieur du rotor (40). L'unité de réception (76) est installée à l'extérieur du rotor (40) dans un état ne tournant pas avec le rotor (40) et reçoit les informations de température (iT) transmises par l'unité de transmission (73).
PCT/JP2020/018325 2019-05-07 2020-04-30 Dispositif de mesure de la température WO2020226128A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-087729 2019-05-07
JP2019087729A JP7279499B2 (ja) 2019-05-07 2019-05-07 温度計測装置

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WO2020226128A1 true WO2020226128A1 (fr) 2020-11-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012144147A (ja) * 2011-01-12 2012-08-02 Pacific Ind Co Ltd タイヤセンサユニット及びタイヤ状態監視装置
JP2013182317A (ja) * 2012-02-29 2013-09-12 Pacific Ind Co Ltd 回転体用無線通信システム
JP2015002618A (ja) * 2013-06-14 2015-01-05 本田技研工業株式会社 回転電機のロータ
JP2016088111A (ja) * 2014-10-29 2016-05-23 ヤンマー株式会社 ヘリコプター
CN108768087A (zh) * 2018-03-30 2018-11-06 中科矿山设备有限公司 大型外转子永磁同步电动机永磁转子无线温度监控装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012144147A (ja) * 2011-01-12 2012-08-02 Pacific Ind Co Ltd タイヤセンサユニット及びタイヤ状態監視装置
JP2013182317A (ja) * 2012-02-29 2013-09-12 Pacific Ind Co Ltd 回転体用無線通信システム
JP2015002618A (ja) * 2013-06-14 2015-01-05 本田技研工業株式会社 回転電機のロータ
JP2016088111A (ja) * 2014-10-29 2016-05-23 ヤンマー株式会社 ヘリコプター
CN108768087A (zh) * 2018-03-30 2018-11-06 中科矿山设备有限公司 大型外转子永磁同步电动机永磁转子无线温度监控装置

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