CN117439346B - High-temperature early warning device for motor rotor - Google Patents
High-temperature early warning device for motor rotor Download PDFInfo
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- CN117439346B CN117439346B CN202311398715.2A CN202311398715A CN117439346B CN 117439346 B CN117439346 B CN 117439346B CN 202311398715 A CN202311398715 A CN 202311398715A CN 117439346 B CN117439346 B CN 117439346B
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- type semiconductor
- rotating shaft
- generation equipment
- temperature
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- 238000010248 power generation Methods 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims description 60
- 238000001514 detection method Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 229910017629 Sb2Te3 Inorganic materials 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 11
- 230000005678 Seebeck effect Effects 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
- G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
-
- 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
- H02P29/66—Controlling or determining the temperature of the rotor
- H02P29/662—Controlling or determining the temperature of the rotor the rotor having permanent magnets
-
- 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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention discloses a motor rotor high-temperature early warning device. The motor rotor is a motor rotor in a permanent magnet synchronous motor, and the device comprises thermoelectric generation equipment and a loop load assembly; the rotor comprises a rotating shaft, a rotor core and a plurality of permanent magnets, the thermoelectric power generation equipment is embedded in the rotor core, two ends of the thermoelectric power generation equipment are respectively connected with the permanent magnets and the shaft body of the rotating shaft, the high-temperature heat source end of the thermoelectric power generation equipment is arranged on the inner surface of the permanent magnets, the direction close to the low-temperature heat source is arranged on the outer surface of the shaft body of the rotating shaft, a loop load assembly is arranged at the shaft head of the rotating shaft, and the loop load assembly is electrically connected with the thermoelectric power generation equipment. The invention can monitor the temperature rise of the rotor in real time and timely judge that the temperature rise of the rotor is too high, and provide buffer time for taking over-temperature protection measures, thereby avoiding the loss of the magnet of the permanent magnet at high temperature and improving the power density of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor rotor high-temperature early warning device.
Background
The permanent magnet synchronous motor is a synchronous motor which utilizes a permanent magnet on a rotor to establish an excitation magnetic field and utilizes a stator to generate a rotating magnetic field, and has the advantages of high operation efficiency, high power density and the like, and is widely applied to the fields of new energy automobiles, aerospace and the like. The existing permanent magnet synchronous motor generally adopts a totally-enclosed structure, so that the heat dissipation capacity of a motor rotor is poor. However, the permanent magnet is easy to lose magnetism at high temperature, and meanwhile, the temperature of the rotor is difficult to detect in real time, so that in the design and control of the motor, a larger safety margin is usually reserved so as to prevent the temperature rise of the rotor from being too high and ensure the running reliability of the motor. In recent years, a plurality of documents propose a method for detecting the temperature rise of a rotor of a permanent magnet synchronous motor in real time to further utilize the motor performance to improve the power density to the greatest extent, but still have the problems of accuracy and reliability.
Most of the existing methods are over-temperature protection by directly detecting the temperature of a rotor, and mainly comprise a wired temperature measuring device and a wireless temperature measuring device. The wired temperature measuring device is not suitable for being arranged on a rotating body, a line needs to be led out of the shaft, measurement is carried out after the motor is stopped, and early warning and timely protection cannot be carried out when the temperature rise of the rotor is too high. The wireless temperature measuring device is used depending on signal transmission, but magnetic field interference exists when the motor operates, so that accurate temperature information is not acquired. All the methods have certain defects, and the monitoring and early warning of the temperature rise of the rotor are limited.
The thermoelectric generation device is a solid-state element manufactured based on the Seebeck effect principle. The seebeck effect refers to the thermoelectric phenomenon of voltage differences caused by the temperature difference of two different electrical conductors, which can be explained as: under a certain temperature difference, carriers of different electric conductors respectively move from the high-temperature heat source to the low-temperature heat source and are accumulated at one end of the low-temperature heat source, so that potential difference is formed between the electric conductors. The device can realize the conversion of heat energy to electric energy, and can be applied to the field of temperature rise monitoring.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a motor rotor high-temperature early warning device, when the temperature difference between a rotor permanent magnet and a rotor rotating shaft exceeds a threshold value, a light emitting diode emits light, and an early warning signal is given out after the light emitting action of the diode is detected by a light receiver arranged on a stator end cover and is transmitted to a motor controller, so that the controller operates in a derating mode.
The technical scheme adopted by the invention is as follows:
the motor rotor is a motor rotor in a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a rotor, a stator and a shell, the rotor and the stator are arranged in the shell, the device is used for monitoring the temperature of the rotor in the motor, and the device comprises temperature difference power generation equipment and a loop load component;
The rotor comprises a hollow rotating shaft, a rotor iron core sleeved on the shaft body of the rotating shaft and a plurality of permanent magnets embedded in the rotor iron core, the thermoelectric power generation equipment is embedded in the rotor iron core, two ends of the thermoelectric power generation equipment are respectively connected with the permanent magnets and the shaft body of the rotating shaft, a high-temperature heat source end of the thermoelectric power generation equipment is arranged on the inner surface of the permanent magnets, the permanent magnets are arranged on the outer surface of the shaft body of the rotating shaft in the direction close to a low-temperature heat source, the permanent magnets are used as high-temperature heat sources, a loop load assembly is arranged at a shaft head of the rotating shaft, and the loop load assembly is electrically connected with the thermoelectric power generation equipment;
When the temperature difference between the permanent magnet and the shaft body is smaller than the threshold temperature difference, the motor normally operates, and when the temperature difference between the permanent magnet and the shaft body is larger than the threshold temperature difference, early warning is carried out and over-temperature protection measures are timely taken.
The permanent magnets are embedded on the same circumference in the rotor core along the circumferential direction, the circumference of the permanent magnets is spaced from the shaft body of the rotating shaft, and the thermoelectric power generation equipment is arranged in the rotor core between the circumference of the permanent magnets and the shaft body of the rotating shaft.
The surface of the shaft head is provided with an open slot, and one end of the open slot, which is close to the shaft body, is provided with a loop load assembly.
And the electric wires electrically connected between the thermoelectric power generation equipment and the loop load assembly penetrate through the rotating shaft to be arranged inside.
The thermoelectric power generation equipment is a thermocouple mainly composed of semiconductors, wherein the semiconductors are divided into a P-type semiconductor and an N-type semiconductor, the loop load component is respectively and electrically connected with the P-type semiconductor and the N-type semiconductor, the P-type semiconductor and the N-type semiconductor form the thermocouple, and thermoelectric potential caused by temperature gradient is formed between the P-type semiconductor and the N-type semiconductor.
The linear direction formed by the P-type semiconductor and the N-type semiconductor is vertically intersected with the linear direction of a connecting line between the permanent magnet serving as a high-temperature heat source and the shaft body of the rotating shaft serving as a low-temperature heat source; the inner end surface and the outer end surface of the P-type semiconductor and the inner end surface of the N-type semiconductor are respectively in contact connection with the permanent magnet and the shaft body of the rotating shaft; the P-type semiconductor and the N-type semiconductor are axially distributed in parallel between the permanent magnet and the shaft body of the rotating shaft.
The loop load assembly comprises a threshold detection component, a light emitting diode and a current limiting resistor; the two ends of the threshold detection component are respectively and electrically connected with the P-type semiconductor and the N-type semiconductor, the light emitting diode and the current limiting resistor are connected in series and then connected with the threshold detection component in parallel, at the moment, the thermoelectric generation equipment serves as a power supply device, and voltage is applied to the two ends of the loop load component through the wiring circuit. The threshold detection part in the loop load component works by judging the voltages at two ends of the loop load component, the internal switch is closed to form a short circuit state when the voltages at two ends are lower than the threshold voltage, and the internal switch is opened to form an open circuit state when the voltages at two ends are higher than the threshold voltage, so that the light-emitting diode emits light. The light receiver arranged on the stator end cover detects the light-emitting action of the diode and gives out an early warning signal which is transmitted to the motor controller, so that the controller operates in a derating mode, and the permanent magnet is prevented from losing magnetism.
According to the seebeck effect formula Δv=αΔt, wherein Δv represents a threshold voltage, Δt represents a threshold temperature difference, α represents a seebeck coefficient, the threshold voltage is determined by the threshold temperature difference, and the threshold voltage is in a proportional relationship with the threshold temperature difference.
The semiconductor material is bismuth telluride, the P-type semiconductor material is Bi 2Te3-Sb2Te3, and the N-type semiconductor material is Bi 2Te3-Bi2Se3.
The light emitting diode is a red light emitting diode.
The invention provides a motor rotor high-temperature early warning device, which is used for monitoring the temperature rise condition of a rotor in real time without additionally detecting the temperature of the rotor, judging that the temperature rise of the rotor is too high in time, and converting the threshold temperature difference into the threshold voltage so as to enable a controller to operate in a derating mode, so that buffer time is provided for taking over-temperature protection measures, the problem of loss of magnetism of a permanent magnet at high temperature is avoided, and the power density of a motor is improved.
The beneficial effects of the invention are as follows:
the invention can monitor the temperature rise of the rotor in real time, can judge the temperature rise of the rotor is too high in time without additionally detecting the temperature of the rotor, provides buffer time for taking over-temperature protection measures, and ensures the reliability of the operation of the motor, thereby avoiding the loss of the magnet at high temperature, improving the power density of the motor and having higher practicability.
Drawings
Fig. 1 is a schematic structural diagram of a motor rotor high-temperature early warning device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a section of a rotor of a permanent magnet synchronous motor according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a thermoelectric power generation device according to an embodiment of the present invention.
The reference numerals in the figures denote: 1. a rotor; 2. a thermoelectric power generation device; 3. a loop load assembly; 4. a rotating shaft; 5. a shaft head; 6. an open slot; 7. a shaft body; 8. a rotor core; 9. a permanent magnet; 10. a P-type semiconductor; 11. an N-type semiconductor; 12. a threshold detection section; 13. a light emitting diode; 14. a current limiting resistor.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, a motor rotor high-temperature early warning device is provided, wherein the motor rotor is a motor rotor in a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a rotor 1, a stator and a shell, and the rotor 1 and the stator are arranged in the shell;
the device comprises a thermoelectric generation device 2 and a loop load assembly 3;
The rotor 1 comprises a hollow rotating shaft 4, a rotor iron core 8 sleeved on a shaft body 7 of the rotating shaft 4 and a plurality of permanent magnets 9 embedded in the rotor iron core 8, the thermoelectric power generation equipment 2 is embedded in the rotor iron core 8, two ends of the thermoelectric power generation equipment 2 are respectively connected with the permanent magnets 9 and the shaft body 7 of the rotating shaft 4, a high-temperature heat source end of the thermoelectric power generation equipment 2 is arranged on the inner surface of the permanent magnets 9, a direction close to a low-temperature heat source is arranged on the outer surface of the shaft body 7 of the rotating shaft 4, the permanent magnets 9 are used as a low-temperature heat source, a loop load assembly 3 is arranged at a shaft head 5 of the rotating shaft 4, and the loop load assembly 3 is electrically connected with the thermoelectric power generation equipment 2.
The permanent magnets 9 are circumferentially embedded on the same circumference in the rotor core 8, and the circumference of the permanent magnets 9 is spaced from the shaft body 7 of the rotating shaft 4, and the thermoelectric power generation equipment 2 is arranged in the rotor core 8 between the circumference of the permanent magnets 9 and the shaft body 7 of the rotating shaft 4.
The surface of the shaft head 5 is provided with an open slot 6, the open slot 6 is provided with a loop load assembly 3 at one end near the shaft 7.
The electric wires electrically connected between the thermoelectric generation equipment 2 and the loop load assembly 3 penetrate through the rotating shaft 4 and are arranged inside.
The thermoelectric power generation device 2 is a thermocouple mainly composed of semiconductors, wherein the semiconductors are divided into a P-type semiconductor 10 and an N-type semiconductor 11, the loop load assembly 3 is electrically connected with the P-type semiconductor 10 and the N-type semiconductor 11 respectively, the P-type semiconductor 10 and the N-type semiconductor 11 compose the thermocouple, and thermoelectric potential caused by temperature gradient is formed between the P-type semiconductor 10 and the N-type semiconductor 11.
The linear direction formed by the P-type semiconductor 10 and the N-type semiconductor 11 perpendicularly intersects with the linear direction of the connecting line between the permanent magnet 9 as a high-temperature heat source and the shaft body 7 of the rotating shaft 4 as a low-temperature heat source; the inner end surface and the outer end surface of the P-type semiconductor 10 and the N-type semiconductor 11 are respectively in contact connection with the permanent magnet 9 and the shaft body 7 of the rotating shaft 4; the P-type semiconductor 10 and the N-type semiconductor 11 are arranged in parallel along the axial direction between the permanent magnet 9 and the shaft body 7 of the rotating shaft 4.
As shown in fig. 3, the loop load assembly 3 includes a threshold detection part 12, a light emitting diode 13, and a current limiting resistor 14; the two ends of the threshold detection part 12 are respectively and electrically connected with the P-type semiconductor 10 and the N-type semiconductor 11, the light emitting diode 13 and the current limiting resistor 14 are connected in series and then connected with the threshold detection part 12 in parallel, the threshold detection part 12 works by judging the voltage at the two ends, the internal switch is closed to form a short circuit state when the voltage at the two ends is lower than the threshold voltage, the internal switch is opened to form an open circuit state when the voltage at the two ends is higher than the threshold voltage, and the internal switch is opened according to the Seebeck effect formula DeltaV=alpha DeltaT, wherein DeltaV represents the threshold voltage, deltaT represents the threshold temperature difference, alpha represents the Seebeck coefficient, the threshold voltage is determined by the threshold temperature difference, and the threshold voltage is in proportional relation with the threshold temperature difference.
The semiconductor material is bismuth telluride, the P-type semiconductor 10 material is Bi 2Te3-Sb2Te3, and the N-type semiconductor 11 material is Bi 2Te3-Bi2Se3.
The light emitting diode 13 is a red light emitting diode.
For further understanding of the present embodiment, the following detailed description will be given for specific implementation procedures:
When the permanent magnet synchronous motor is operating normally, the permanent magnet 9 itself heats up due to the eddy current loss, which in turn leads to an increase in the temperature of the entire rotor 1. However, the temperature of the shaft body 7 of the rotating shaft 4 is generally lower than the permanent magnet 9, and the temperature difference between the permanent magnet 9 and the shaft body 7 of the rotating shaft 4 is determined under specific conditions, for example: at room temperature of 20 ℃, the temperature of the permanent magnet is about 130 ℃, and the temperature of the shaft body 7 of the rotating shaft 4 is 5 ℃ lower than that of the permanent magnet. Therefore, the corresponding threshold temperature difference can be determined according to different working conditions, when the temperature difference between the permanent magnet 9 and the shaft body 7 of the rotating shaft 4 is smaller than the threshold temperature difference, the motor normally operates, and when the temperature difference between the permanent magnet 9 and the shaft body 7 of the rotating shaft 4 is larger than the threshold temperature difference, early warning is carried out and over-temperature protection measures are timely taken.
After determining the threshold temperature difference, the thermoelectric power generation device 2 of the embodiment converts the threshold temperature difference into a corresponding threshold voltage based on the seebeck effect principle, and at this time, the thermoelectric power generation device 2 acts as a power supply device and applies voltage to two ends of the loop load component 3 through the wiring circuit. The threshold detection section 12 in the loop load assembly 3 operates by judging the voltage across it: when the voltage at two ends is lower than the threshold voltage, the internal switch is closed, so that an electric connection path formed by the loop load component and the thermoelectric generation equipment is in a short circuit state, and the motor normally operates; when the voltage at both ends is higher than the threshold voltage, the internal switch is turned off, and at this time, the light emitting diode 13 is turned on and the current limiting resistor 14 is in an open state, and the light emitting diode 13 emits light. The light receiver arranged on the stator end cover detects the light-emitting action of the diode and gives out an early warning signal which is transmitted to the motor controller, so that the controller operates in a derating mode, and the permanent magnet is prevented from losing magnetism.
The motor rotor high-temperature early warning device provided by the embodiment can monitor the temperature rise of the rotor 1 in real time by converting the threshold temperature difference into the threshold voltage. Unlike the existing rotor temperature measurement technology, the embodiment does not need to accurately detect the temperature of the rotor 1, and can avoid the loss of magnetism of the permanent magnet 9 caused by detection errors; in addition, the embodiment can conduct the light emitting diode 13 for early warning at the first time after judging that the temperature of the rotor 1 is excessively high, so that buffer time is provided for taking over-temperature protection measures, and the practicability is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a motor rotor high temperature early warning device, motor rotor is motor rotor among the PMSM, and PMSM includes rotor (1), stator and casing, and rotor (1) and stator set up in the casing is inside, its characterized in that:
the device comprises a thermoelectric generation device (2) and a loop load assembly (3);
The thermoelectric power generation equipment (2) mainly comprises semiconductors, wherein the semiconductors are divided into a P-type semiconductor (10) and an N-type semiconductor (11), and the loop load assembly (3) is electrically connected with the P-type semiconductor (10) and the N-type semiconductor (11) respectively;
The linear direction formed by the P-type semiconductor (10) and the N-type semiconductor (11) is perpendicularly intersected with the linear direction of a connecting line between the permanent magnet (9) and the shaft body (7) of the rotating shaft (4); the inner end surface and the outer end surface of the P-type semiconductor (10) and the N-type semiconductor (11) are respectively in contact connection with the permanent magnet (9) and the shaft body (7) of the rotating shaft (4); the P-type semiconductor (10) and the N-type semiconductor (11) are axially distributed in parallel between the permanent magnet (9) and the shaft body (7) of the rotating shaft (4);
the loop load assembly (3) comprises a threshold detection component (12), a light emitting diode (13) and a current limiting resistor (14); the two ends of the threshold detection component (12) are respectively and electrically connected with the P-type semiconductor (10) and the N-type semiconductor (11), and the light emitting diode (13) and the current limiting resistor (14) are connected in series and then connected with the threshold detection component (12) in parallel;
The rotor (1) comprises a hollow rotating shaft (4), a rotor iron core (8) sleeved on a shaft body (7) of the rotating shaft (4) and a plurality of permanent magnets (9) embedded in the rotor iron core (8), the thermoelectric generation equipment (2) is embedded in the rotor iron core (8), two ends of the thermoelectric generation equipment (2) are respectively connected with the permanent magnets (9) and the shaft body (7) of the rotating shaft (4), a high-temperature heat source end of the thermoelectric generation equipment (2) is arranged on the inner surface of the permanent magnets (9), a direction close to a low-temperature heat source is arranged on the outer surface of the shaft body (7) of the rotating shaft (4), a loop load assembly (3) is arranged at a shaft head (5) of the rotating shaft (4), and the loop load assembly (3) is electrically connected with the thermoelectric generation equipment (2).
2. The motor rotor high temperature warning device according to claim 1, wherein:
the permanent magnets (9) are circumferentially embedded on the same circumference in the rotor core (8), the circumference where the permanent magnets (9) are located and the shaft body (7) of the rotating shaft (4) are separated by a distance, and the thermoelectric power generation equipment (2) is arranged in the rotor core (8) between the circumference where the permanent magnets (9) are located and the shaft body (7) of the rotating shaft (4).
3. The motor rotor high temperature warning device according to claim 1, wherein:
The surface of the shaft head (5) is provided with an open slot (6), and one end, close to the shaft body (7), of the open slot (6) is provided with a loop load assembly (3).
4. The motor rotor high temperature warning device according to claim 1, wherein:
the electric wires electrically connected between the thermoelectric power generation equipment (2) and the loop load assembly (3) penetrate through the rotating shaft (4) to be arranged inside.
5. The motor rotor high temperature warning device according to claim 1, wherein:
The material of the P-type semiconductor (10) is Bi 2Te3-Sb2Te3, and the material of the N-type semiconductor (11) is Bi 2Te3-Bi2Se3.
6. The motor rotor high temperature warning device according to claim 1, wherein:
the light emitting diode (13) is a red light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311398715.2A CN117439346B (en) | 2023-10-26 | 2023-10-26 | High-temperature early warning device for motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311398715.2A CN117439346B (en) | 2023-10-26 | 2023-10-26 | High-temperature early warning device for motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117439346A CN117439346A (en) | 2024-01-23 |
| CN117439346B true CN117439346B (en) | 2024-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311398715.2A Active CN117439346B (en) | 2023-10-26 | 2023-10-26 | High-temperature early warning device for motor rotor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227589A (en) * | 2013-03-19 | 2013-07-31 | 郭富强 | Thermoelectric power generation method through heat exchange and device |
| CN111486063A (en) * | 2020-04-15 | 2020-08-04 | 重庆三峡学院 | Power generation device with shock-absorbing function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656818U (en) * | 2010-01-07 | 2010-11-24 | 上海电力学院 | DC refrigerator driven by solar photovoltaic power and temperature-difference power |
| EP2887511A1 (en) * | 2013-12-20 | 2015-06-24 | ABB Technology AG | Sensor assembly for measuring at least a temperature on a moving part of an electric machine |
| JP2019129571A (en) * | 2018-01-23 | 2019-08-01 | 株式会社荏原製作所 | Electric motor assembly and control unit |
| CN112242780B (en) * | 2020-09-29 | 2022-04-12 | 中车永济电机有限公司 | Permanent magnet synchronous motor with rotor temperature measuring device |
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2023
- 2023-10-26 CN CN202311398715.2A patent/CN117439346B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227589A (en) * | 2013-03-19 | 2013-07-31 | 郭富强 | Thermoelectric power generation method through heat exchange and device |
| CN111486063A (en) * | 2020-04-15 | 2020-08-04 | 重庆三峡学院 | Power generation device with shock-absorbing function |
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| Publication number | Publication date |
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| CN117439346A (en) | 2024-01-23 |
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