CN117296223A - Temperature monitoring device and method - Google Patents
Temperature monitoring device and method Download PDFInfo
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- CN117296223A CN117296223A CN202180098009.9A CN202180098009A CN117296223A CN 117296223 A CN117296223 A CN 117296223A CN 202180098009 A CN202180098009 A CN 202180098009A CN 117296223 A CN117296223 A CN 117296223A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims description 54
- 238000013021 overheating Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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Abstract
The invention relates to a temperature monitoring device and a method, which are applied to a driving unit of an in-wheel motor, wherein the monitoring device comprises: a first temperature switching element which is mounted on a first phase coil of the in-wheel motor, and changes resistance when the temperature of the first temperature switching element exceeds a first set threshold value; and the motor control unit is used for detecting the output quantity of the first temperature switching element and judging that the hub motor is overheated when the output quantity of the first temperature switching element exceeds a first threshold value. Like this, can in time accurate detection come out when in-wheel motor overheated, prevent to appear detecting the deviation.
Description
The invention relates to the technical field of motor temperature monitoring, in particular to a temperature monitoring device and a temperature monitoring method.
In the related art, monitoring of a three-phase motor in a driving unit of an in-wheel motor is performed using a temperature sensor. In order to avoid overheating of the motor, the temperature threshold set by the motor control unit due to the power-down strategy is well below the physical limit temperature of the motor, which results in reduced performance of the motor. Because the temperature sensor only monitors whether the output voltage value exceeds the preset voltage range, and the temperature monitoring range corresponding to the voltage monitoring range of the temperature sensor is far greater than the actual running temperature range of the motor, in the monitoring range of the temperature sensor, the monitoring function of the temperature sensor cannot accurately judge whether the monitoring of the temperature sensor has larger deviation, so that the problem that the motor cannot be effectively monitored despite overheating occurs.
Disclosure of Invention
The present invention aims to overcome or at least alleviate the above-mentioned drawbacks of the prior art and to provide a temperature monitoring device and a method.
In order to solve the above-mentioned technical problem, according to an embodiment of the present invention, there is provided a temperature monitoring device applied to a driving unit of an in-wheel motor, including: a first temperature switching element that is mounted to a first phase coil of the in-wheel motor, and changes in resistance when its own temperature exceeds a first set threshold value; and the motor control unit is used for detecting the output quantity of the first temperature switching element and judging that the hub motor is overheated when the output quantity of the first temperature switching element exceeds a first threshold value.
In order to solve the above technical problem, according to another embodiment of the present invention, there is provided a temperature monitoring method applied to a driving unit of an in-wheel motor, including: detecting the output quantity of a first temperature switch element, wherein the first temperature switch element is arranged on a first phase coil of the hub motor, and when the temperature of the first temperature switch element exceeds a first set threshold value, the resistance of the first temperature switch element changes; and judging that the hub motor is overheated when the output quantity of the first temperature switching element exceeds a first threshold value.
According to the temperature monitoring device and the temperature monitoring method, the overheat of the hub motor can be timely and accurately detected, and the situation that the performance of the hub motor is poor due to detection deviation is prevented.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a block diagram of a temperature monitoring device, according to an exemplary embodiment;
fig. 2 is a schematic diagram showing a resistance change of a first temperature switching element according to an exemplary embodiment;
FIG. 3 is a flowchart illustrating a temperature monitoring method according to an exemplary embodiment;
FIG. 4 is a block diagram of a temperature monitoring device, according to an exemplary embodiment;
FIG. 5 is a flowchart illustrating a temperature monitoring method according to an exemplary embodiment;
FIG. 6 is a block diagram of a temperature monitoring device, according to an example embodiment;
FIG. 7 is a flowchart illustrating a temperature monitoring method according to an exemplary embodiment;
FIG. 8 is a block diagram of a temperature monitoring device, according to an example embodiment;
FIG. 9 is a flowchart illustrating a temperature monitoring method according to an exemplary embodiment;
FIG. 10 illustrates a block diagram of a temperature monitoring device, according to an exemplary embodiment;
FIG. 11 illustrates a flow chart of a temperature monitoring method according to an exemplary embodiment.
Various exemplary embodiments, features and aspects of the invention will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
In the related art, the temperature monitoring of the three-phase hub motor can be performed by the following modes: a temperature sensor is respectively arranged on any one phase coil or any two phase coils of the three-phase motor to monitor whether the phase coils provided with the temperature sensor are overheated or not. However, in the case of overheating of a phase coil to which a temperature sensor is not mounted, since a temperature sensor for monitoring whether overheating occurs is not mounted thereto, it is naturally impossible to monitor overheating of the phase coil.
To solve the above problems, in the related art, one temperature sensor is mounted on each of three phase coils of a three-phase motor. However, since the physical monitoring method of each temperature sensor is the same, if any one temperature sensor has a monitoring failure, the cross check cannot be realized.
In addition, as described above, the temperature sensor has a monitoring function of only monitoring the temperature within a certain range, and the possibility of occurrence of detection deviation is high, so that overheating of the motor cannot be monitored in time. In view of the above, the invention provides a temperature monitoring device and a temperature monitoring method for a driving unit of an in-wheel motor, which can timely and accurately monitor the overheat of the in-wheel motor and further prevent the performance of the motor from being reduced.
First, a temperature monitoring device according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a system configuration example of a temperature monitoring device according to an exemplary embodiment. This temperature monitoring device is applied to the drive unit of in-wheel motor, includes: a first temperature switching element 101 mounted on a first phase coil of the in-wheel motor, the first temperature switching element 101 having a resistance that changes when the detected temperature exceeds a first set threshold; the motor control unit 102 is configured to detect an output amount of the first temperature switching element 101, and determine that the in-wheel motor is overheated when the output amount of the first temperature switching element 101 exceeds the first threshold value.
The in-wheel motor (hereinafter also simply referred to as "motor") has coils of U-phase, V-phase and W-phase, and the first phase coil may be any one-phase coil within the motor, and the first temperature switching element 101 is installed near any one-phase coil, and in one possible implementation, near the one-phase coil having the lowest temperature.
The first temperature switching element 101 has the following properties: when the temperature exceeds the first set threshold, the resistance decreases with an increase in temperature, and the output amount of the first temperature switching element 101 increases with an increase in temperature, wherein the output amount may be an output voltage or an output current. The first temperature switching element 101 corresponds to a power supply with a standard sensor and an appropriate pull-up resistor to be read as a switching signal (0 or 1). The resistance change of the first temperature switching element 101 is reversible within the allowable operating temperature range of the motor, as shown in fig. 2.
In a possible implementation, if the operating temperature of the motor is greater than the first set threshold, the resistance of the first temperature switching element 101 becomes low, at which point the motor control unit 102 detects a larger current.
In another possible implementation, if the operation temperature of the motor is greater than the first set threshold, the resistance of the first temperature switching element 101 becomes low, at which time the motor control unit 102 detects a larger voltage.
Next, an operation procedure of the temperature monitoring device of fig. 1 for realizing temperature monitoring will be described. Fig. 3 is a flowchart of a temperature monitoring method of the temperature monitoring apparatus shown in fig. 1.
Step 30: the output quantity of the first temperature switching element 101 is detected.
Step 31: when the output quantity of the first temperature switching element 101 exceeds a first threshold value, it is determined that the motor is overheated.
It should be noted that, although the temperature monitoring device applied to the in-wheel motor driving unit is described above by taking the first temperature switching element 101 as an example, those skilled in the art will understand that the present invention should not be limited thereto. In fact, any element, as long as it has the property of significantly varying its output at temperatures exceeding a set threshold, can implement the inventive concept.
As described above, according to the temperature monitoring device shown in the exemplary embodiment shown in fig. 1 described above, by exceeding the set first threshold value according to whether or not the output amount of the first temperature switching element 101 is present, it is possible to quickly detect whether or not overheat of the coil is present, thereby determining whether or not overheat of the motor has occurred.
Fig. 4 is a system structural view of a temperature monitoring device according to an exemplary embodiment, which is applied to a driving unit of an in-wheel motor. The same components as those in fig. 1 are numbered identically in fig. 4, and detailed descriptions of these components are omitted for the sake of brevity.
As shown in fig. 4, the temperature monitoring device shown in fig. 4 has: a first temperature switching element 101, a second temperature switching element 201, and a motor control unit 102. The main difference between the temperature monitoring device shown in fig. 4 and fig. 1 is that the temperature monitoring device has a second temperature switching element 201, the second temperature switching element 201 has the same performance as the first temperature switching element 101, and when the temperature exceeds a second set threshold value, the resistance of the second temperature switching element 201 changes, and the temperature monitoring device is mounted on a second phase coil different from the first temperature switching element 101 in the motor, for example, the first temperature switching element 101 is mounted near the U-phase, the second temperature switching element 201 is mounted near the V-phase, or vice versa.
The motor control unit 102 of this exemplary embodiment determines that the motor is overheated when the output amount of the first temperature switching element 101 exceeds a first threshold value, or determines that the motor is overheated when the output amount of the second temperature switching element 201 exceeds a second threshold value.
In the same manner as the first temperature switching element 101, the resistance change of the second temperature switching element 201 is reversible in the allowable operating temperature range of the motor. The output of the second temperature switching element 201 may be an output voltage or an output current.
In a possible implementation, if the operating temperature of the motor is greater than the second set threshold, the resistance of the second temperature switching element 201 becomes low, at which point the motor control unit 102 detects a larger current.
In another possible implementation, if the operating temperature of the motor is greater than the second set threshold, the resistance of the second temperature switching element 201 becomes low, at which point the motor control unit 102 detects a larger voltage.
The first set threshold value and the second set threshold value may be set to the same value, or may be set to different values with small changes, which is not particularly limited in the present invention.
Next, an operation procedure of the temperature monitoring device shown in fig. 4 for realizing temperature monitoring will be described. Fig. 5 is a flowchart of a temperature monitoring method of the temperature monitoring apparatus shown in fig. 4.
Step 50: the output amounts of the first temperature switching element 101 and the second temperature switching element 201 are detected.
Step 51: when the output amount of the first temperature switching element 101 exceeds a first threshold value, or when the output amount of the second temperature switching element 201 exceeds a second threshold value, the motor is determined to be overheated.
The first threshold value and the second threshold value may be set to the same value, or may be set to different values with small changes, which is not particularly limited in the present invention.
It should be noted that, although the temperature monitoring device applied to the in-wheel motor driving unit is described above by taking the first temperature switching element 101 and the second temperature switching element 201 as examples, the present invention should not be limited thereto as those skilled in the art will appreciate. In fact, any element, as long as it has the property of significantly varying its output at temperatures exceeding a set threshold, can implement the inventive concept.
As described above, according to the temperature monitoring device shown in the exemplary embodiment shown in fig. 4 described above, by whether the output amount of the first temperature switching element 101 exceeds the first threshold value or the output amount of the second temperature switching element 201 exceeds the second threshold value, it is possible to quickly detect whether there is overheating of the coil, thereby determining whether overheating of the motor occurs. Since the temperature monitoring device shown in fig. 4 has the second temperature switching element 201 added near the second phase coil, the operating temperature of the 2-phase coil is considered when the motor is determined to be overheated, compared with the temperature monitoring device shown in fig. 1, thereby reducing the possibility of occurrence of excessive coil temperature and missed detection.
Fig. 6 is a system structural view of a temperature monitoring device according to an exemplary embodiment, which is applied to a driving unit of an in-wheel motor. The same components as those in fig. 4 are numbered identically in fig. 6, and detailed descriptions of these components are omitted for the sake of brevity.
As shown in fig. 6, the temperature monitoring device shown in fig. 6 includes: a first temperature switching element 101, a second temperature switching element 201, a first temperature sensor 103, and a motor control unit 102. The first temperature switch element 101 is mounted on a first phase coil of the motor, the second temperature switch element 201 is mounted on a second phase coil of the motor, and the first temperature sensor 103 is mounted on a third phase coil of the motor, and in one possible implementation, the temperature of the third phase coil where the first temperature sensor 103 is located is the highest. The main difference between the temperature monitoring device shown in fig. 6 and fig. 4 is that the temperature monitoring device has a first temperature sensor 103, where the first temperature sensor 103 may be an NTC sensor or a PTC sensor, and is used to determine the temperature of the third phase coil where the first temperature sensor is located, so that temperature monitoring within a certain temperature range may be achieved.
The motor control unit 102 shown in this exemplary embodiment determines that the motor is overheated when the output amount of the first temperature switching element 101 exceeds a first threshold value, or when the output amount of the second temperature switching element 201 exceeds a second threshold value; when the output amount of the first temperature sensor 103 exceeds the third threshold, the output amount of the first temperature switching element 101 does not exceed the first threshold, and the output amount of the second temperature switching element 201 does not exceed the second threshold, it is determined that the detection deviation of the first temperature sensor 103 occurs.
Next, an operation procedure of the temperature monitoring device shown in fig. 6 for realizing temperature monitoring will be described. Fig. 7 is a flowchart of a temperature monitoring method of the temperature monitoring apparatus shown in fig. 6.
Step 70: the output amounts of the first temperature switching element 101, the second temperature switching element 201, and the first temperature sensor 103 are detected.
Step 71: determining that the motor is overheated when the output of the first temperature switching element 101 exceeds a first threshold value or when the output of the second temperature switching element 201 exceeds a second threshold value; when the output amount of the first temperature sensor 103 exceeds the third threshold, the output amount of the first temperature switching element 101 does not exceed the first threshold, and the output amount of the second temperature switching element 201 does not exceed the second threshold, it is determined that the detection deviation of the first temperature sensor 103 occurs.
The first threshold value and the second threshold value may be set to the same value, or may be set to different values with small changes, which is not particularly limited in the present invention. The third threshold value is determined based on the maximum limit value corresponding to the temperature monitoring range of the first temperature sensor 103.
In the embodiment of the invention, when the temperature of the first temperature switch element 101 exceeds a first set threshold, the resistance value is changed obviously, when the temperature of the second temperature switch element 201 exceeds a second set threshold, the resistance value is changed obviously, and the first temperature switch element 101 and the second temperature switch element 201 are sensitive to monitoring of the set specific temperature value; the first temperature sensor 103 is an NTC sensor or a PTC sensor, which can monitor the temperature within a certain range, and is used for determining the temperature of the third phase coil, so that the possibility of deviation is high.
As described above, in the temperature monitoring device shown in the exemplary embodiment shown in fig. 6 described above, by detecting whether there is overheating of the coil promptly based on whether there is the output amount of the first temperature switching element 101 exceeding the first threshold value or the output amount of the second temperature switching element 201 exceeding the second threshold value, it is possible to determine whether or not overheating of the motor occurs, and at the same time, it is determined whether or not the detection deviation occurs in the first temperature sensor 103 in combination with the output amount of the first temperature sensor 103.
Because the temperature monitoring device shown in fig. 6 is provided with the first temperature sensor 103 near the third phase coil, compared with the temperature monitoring device shown in fig. 4, on the premise of judging that the motor is overheated, the temperature of the remaining one phase coil is monitored simultaneously, so that the real-time monitoring of the motor temperature is realized; compared with the temperature monitoring device shown in fig. 1, when the motor is judged to be overheated, the operation temperature of the 2-phase coil is considered, so that the possibility of missed detection caused by overhigh temperature of the coil is reduced, and meanwhile, the temperature monitoring of the third-phase coil is realized, and the temperature of the motor is monitored in real time.
Fig. 8 is a system structural view of a temperature monitoring device according to an exemplary embodiment, which is applied to a driving unit of an in-wheel motor. The same components as those in fig. 1 are numbered identically in fig. 8, and detailed descriptions of these components are omitted for the sake of brevity.
As shown in fig. 8, the temperature monitoring device shown in fig. 8 has: a first temperature switching element 101, a second temperature sensor 203, and a motor control unit 102. The main difference between fig. 8 and the temperature monitoring device shown in fig. 1 is that there is a second temperature sensor 203 installed in a second phase coil different from the first temperature switching element 101 in the motor, for example, the first temperature switching element 101 is installed near the U-phase, and the second temperature sensor 203 is installed near the W-phase; or vice versa, as long as they are mounted on different phase coils.
In a possible implementation, the second temperature sensor 203 is installed near the phase coil with the highest temperature, and the first temperature switching element 101 is installed at any one of the remaining 2-phase coils. The second temperature sensor 203 is an NTC sensor or a PTC sensor, and can monitor the temperature within a certain range, and is used for determining the temperature of the third phase coil where the second temperature sensor is located, so that the possibility of deviation is high. The output of the second temperature sensor 203 is an output voltage or an output current.
The motor control unit 102 shown in this exemplary embodiment determines that the motor is overheated when the output amount of the first temperature switching element 101 exceeds a first threshold value; when the output amount of the second temperature sensor 203 exceeds the fourth threshold value and the output amount of the first temperature switching element 101 does not exceed the first threshold value, it is determined that the detection deviation of the first temperature sensor 103 occurs.
The fourth threshold is determined according to a maximum limit value corresponding to the temperature monitoring range of the second temperature sensor 203.
Next, an operation procedure of the temperature monitoring device shown in fig. 8 for realizing temperature monitoring will be described. Fig. 9 is a flowchart of a temperature monitoring method of the temperature monitoring apparatus shown in fig. 8.
Step 90: the output amounts of the first temperature switching element 101 and the first temperature sensor 103 are detected.
Step 91: determining that the motor is overheated when the output quantity of the first temperature switching element 101 exceeds a first threshold value; when the output amount of the second temperature sensor 203 exceeds the fourth threshold value and the output amount of the first temperature switching element 101 does not exceed the first threshold value, it is determined that the detection deviation of the second temperature sensor 203 occurs.
As described above, in the temperature monitoring device shown in fig. 8, whether or not there is overheating of the coil can be quickly detected by whether or not the output amount of the first temperature switching element 101 exceeds the first threshold value, and whether or not overheating of the motor occurs can be determined. Since the temperature monitoring device in fig. 8 has the second temperature sensor 203 added near the second phase coil, compared with the temperature monitoring device in fig. 1, on the premise of determining that the motor is overheated, the temperature of the first phase coil is monitored simultaneously, so that the real-time monitoring of the motor temperature is realized.
Fig. 10 is a system structural view of a temperature monitoring device according to an exemplary embodiment, which is applied to a driving unit of an in-wheel motor. The same components as those in fig. 8 are numbered identically in fig. 10, and detailed descriptions of these components are omitted for the sake of brevity.
As shown in fig. 10, the temperature monitoring device shown in fig. 10 includes: a first temperature switching element 101, a second temperature sensor 203, a third temperature sensor 303, and a motor control unit 102. The main difference between the motor temperature monitoring device shown in fig. 10 and fig. 8 is that the motor temperature monitoring device has a third temperature sensor 303, which has the same performance as the second temperature sensor 203, and is mounted on a third phase coil different from the first temperature switching element 101 and the second temperature sensor 203 in the motor, for example, the first temperature switching element 101 is mounted near the U-phase, the second temperature sensor 203 is mounted near the V-phase, and the third temperature sensor 303 is mounted near the W-phase; as long as they are mounted on different phase coils. In a possible implementation, the second temperature sensor 203 or the third temperature sensor 303 is mounted in the phase loop with the highest temperature, e.g. the W-phase. The output of the third temperature sensor 303 is an output voltage or an output current.
The motor control unit 102 shown in this exemplary embodiment determines that the motor is overheated when the output amount of the first temperature switching element 101 exceeds a first threshold value; when the output quantity of the second temperature sensor 203 exceeds the fourth threshold value and the output quantity of the first temperature switching element 101 does not exceed the first threshold value, it is determined that the second temperature sensor 203 has a detection deviation; and determining that the detection deviation occurs in the third temperature sensor 303 when the output quantity of the third temperature sensor 303 exceeds the fifth threshold value and the output quantity of the first temperature switching element 101 does not exceed the first threshold value.
The fifth threshold value is determined based on the maximum limit value corresponding to the temperature monitoring range of the third temperature sensor 303. The fourth threshold value and the fifth threshold value may be set to the same value, or may be set to different values with small changes, which is not particularly limited in the present invention. Next, an operation procedure of the temperature monitoring device shown in fig. 10 for realizing temperature monitoring will be described. Fig. 11 is a flowchart of a temperature monitoring method of the temperature monitoring apparatus shown in fig. 10.
Step 110: the output amounts of the first temperature switching element 101, the second temperature sensor 203, and the third temperature sensor 303 are detected.
Step 120: when the output quantity of the first temperature switching element 101 exceeds a first threshold value, the motor overheat is judged; when the output quantity of the second temperature sensor 203 exceeds the fourth threshold value and the output quantity of the first temperature switching element 101 does not exceed the first threshold value, it is determined that the second temperature sensor 203 has a detection deviation; and determining that the detection deviation occurs in the third temperature sensor 303 when the output quantity of the third temperature sensor 303 exceeds the fifth threshold value and the output quantity of the first temperature switching element 101 does not exceed the first threshold value.
As described above, in the temperature monitoring device shown in fig. 10, whether or not there is overheating of the coil can be quickly detected by whether or not the output amount of the first temperature switching element 101 exceeds the first threshold value, and whether or not overheating of the motor occurs can be determined. Because the temperature monitoring device in fig. 10 is provided with the second temperature sensor 203 and the third temperature sensor 303 near the second phase coil and the third phase coil respectively, compared with the temperature monitoring device in fig. 1, on the premise of judging that the motor is overheated, the temperatures of the second phase coil and the third phase coil are monitored simultaneously, so that the real-time monitoring of the motor temperature is realized; the temperature monitoring of the third phase coil is increased compared to the temperature monitoring device in fig. 8, so that the temperature monitoring is more accurate.
In the embodiment of the present invention, the first temperature switching element 101 is used, and when the temperature exceeds the first set threshold, the resistance thereof is significantly changed, so that the output thereof is also significantly changed, and thus, whether the coil is overheated or not can be rapidly detected according to whether the output thereof exceeds the first threshold or not, and overheat protection of the motor can be rapidly performed under any energizing condition.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
- A temperature monitoring device applied to a drive unit of an in-wheel motor, comprising:a first temperature switching element that is mounted to a first phase coil of the in-wheel motor, and changes in resistance when its own temperature exceeds a first set threshold value;and the motor control unit is used for detecting the output quantity of the first temperature switching element and judging that the hub motor is overheated when the output quantity of the first temperature switching element exceeds a first threshold value.
- The temperature monitoring device of claim 1, further comprising:a second temperature switching element mounted to a second phase coil of the in-wheel motor, the second temperature switching element having a resistance that changes when a temperature thereof exceeds a second set threshold value,the motor control unit also detects an output quantity of the second temperature switching element, and determines that the in-wheel motor is overheated when the output quantity of the second temperature switching element exceeds a second threshold value.
- The temperature monitoring device of claim 2, further comprising:a first temperature sensor mounted to a third phase coil of the in-wheel motor for determining a temperature of the third phase coil;the motor control unit also detects an output amount of the first temperature sensor, and determines that a detection deviation occurs in the first temperature sensor when the output amount of the first temperature sensor exceeds a third threshold, the output amount of the first temperature switching element does not exceed the first threshold, and the output amount of the second temperature switching element does not exceed the second threshold.
- A temperature monitoring device according to claim 3, wherein the temperature of the third phase coil is higher than the temperature of both the second phase coil and the first phase coil.
- The temperature monitoring device of claim 1, further comprising:a second temperature sensor mounted to a second phase coil of the in-wheel motor for determining a temperature of the second phase coil;the motor control unit also detects an output amount of the second temperature sensor, and determines that a detection deviation occurs in the second temperature sensor when the output amount of the second temperature sensor exceeds a fourth threshold value and the output amount of the first temperature switching element does not exceed the first threshold value.
- The temperature monitoring device of claim 5, further comprising:a third temperature sensor mounted to a third phase coil of the in-wheel motor for determining a temperature of the third phase coil;the motor control unit also detects an output amount of the third temperature sensor, and determines that a detection deviation occurs in the third temperature sensor when the output amount of the third temperature sensor exceeds a fifth threshold value and the output amount of the first temperature switching element does not exceed the first threshold value.
- A temperature monitoring method applied to a driving unit of an in-wheel motor, comprising:detecting the output quantity of a first temperature switch element, wherein the first temperature switch element is arranged on a first phase coil of the hub motor, and when the temperature of the first temperature switch element exceeds a first set threshold value, the resistance of the first temperature switch element changes;and judging that the hub motor is overheated when the output quantity of the first temperature switching element exceeds a first threshold value.
- The temperature monitoring method of claim 7, further comprising:detecting an output quantity of a second temperature switching element mounted to a second phase coil of the in-wheel motor, the second temperature switching element changing in resistance when its own temperature exceeds a second set threshold value, and,and judging that the hub motor is overheated when the output quantity of the second temperature switching element exceeds a second threshold value.
- The temperature monitoring method of claim 8, further comprising:detecting an output quantity of a first temperature sensor, wherein the first temperature sensor is arranged on a third phase coil of the hub motor and is used for determining the temperature of the third phase coil; the method comprises the steps of,and determining that the first temperature sensor has a detection deviation when the output quantity of the first temperature sensor exceeds a third threshold value, the output quantity of the first temperature switching element does not exceed the first threshold value, and the output quantity of the second temperature switching element does not exceed the second threshold value.
- The temperature monitoring method of claim 9, wherein the temperature of the third phase coil is higher than the temperature of both the second phase coil and the first phase coil.
- The temperature monitoring method of claim 7, further comprising:detecting an output quantity of a second temperature sensor, wherein the second temperature sensor is arranged on a second phase coil of the hub motor and is used for determining the temperature of the second phase coil; the method comprises the steps of,when the output quantity of the second temperature sensor exceeds a fourth threshold value and the output quantity of the first temperature switching element does not exceed the first threshold value, it is determined that the second temperature sensor has a detection deviation.
- The temperature monitoring method of claim 11, further comprising:detecting an output quantity of a third temperature sensor, wherein the third temperature sensor is arranged on a third phase coil of the hub motor and is used for determining the temperature of the third phase coil; the method comprises the steps of,when the output quantity of the third temperature sensor exceeds a fifth threshold value and the output quantity of the first temperature switching element does not exceed the first threshold value, it is determined that the third temperature sensor has a detection deviation.
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| PCT/CN2021/092704 WO2022236556A1 (en) | 2021-05-10 | 2021-05-10 | Temperature monitoring device and method |
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| JPS6247528A (en) * | 1985-08-28 | 1987-03-02 | Toyota Motor Corp | Correcting method for detected temperature of temperature sensor |
| CN201774691U (en) * | 2010-01-30 | 2011-03-23 | 东莞市前锋电子有限公司 | Overheating protection device of electromagnetic range |
| WO2016208242A1 (en) * | 2015-06-26 | 2016-12-29 | 株式会社村田製作所 | Motor |
| CN106092376B (en) * | 2016-08-25 | 2019-03-01 | 杨志强 | A kind of wireless temperature measurement means for correcting and method |
| CN211089112U (en) * | 2019-11-22 | 2020-07-24 | 南京长亚轨道交通科技有限公司 | Brushless motor overheat protection device for electric door of railway passenger car |
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- 2021-05-10 WO PCT/CN2021/092704 patent/WO2022236556A1/en active Application Filing
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| WO2022236556A1 (en) | 2022-11-17 |
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