CN220022539U - Temperature measurement structure of permanent magnet motor rotor magnetic steel and permanent magnet motor - Google Patents
Temperature measurement structure of permanent magnet motor rotor magnetic steel and permanent magnet motor Download PDFInfo
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- CN220022539U CN220022539U CN202321508626.4U CN202321508626U CN220022539U CN 220022539 U CN220022539 U CN 220022539U CN 202321508626 U CN202321508626 U CN 202321508626U CN 220022539 U CN220022539 U CN 220022539U
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- magnet motor
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 14
- 239000000523 sample Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model discloses a temperature measurement structure of rotor magnetic steel of a permanent magnet motor and the permanent magnet motor, wherein the permanent magnet motor comprises a rotor and a plurality of magnetic steels arranged on the peripheral wall surface of the rotor, a gap with the length along the axial direction of the rotor is arranged between any two magnetic steels, and the temperature measurement structure comprises: the end cover is arranged at the end part of the rotor, a through hole penetrating through the inner wall and the outer wall of the end cover is formed in the end cover, and the distance from the through hole to the axis of the rotating shaft of the rotor is equal to the distance from the gap to the axis of the rotating shaft; one end of the temperature measuring guide rod can pass through the through hole and extend into any position of any gap. According to the utility model, the distance from the through hole to the rotating shaft is equal to the distance from the gap to the rotating shaft, and the rotor can be rotated to drive the gaps at different positions to align with the through hole, so that the temperature measuring guide rod stretches into the gaps at different positions to measure the temperature; meanwhile, the depth of the temperature measuring guide rod extending into the gap is adjusted, so that the temperature measuring guide rod can measure the temperature of different axial positions of the magnetic steel, and measured temperature data are more comprehensive.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a temperature measurement structure of rotor magnetic steel of a permanent magnet motor and the permanent magnet motor.
Background
In the permanent magnet motor, the magnetic steel is very sensitive to the working temperature, when the temperature of the magnetic steel is too high, the magnetic performance of the magnetic steel can be rapidly reduced, so that the performance of the motor is reduced, great difficulty is brought to the guarantee of the control precision of the motor, and meanwhile, the loss of the magnetic power of the motor magnetic steel is greatly increased. Therefore, there is a need for a temperature rise test of a motor to measure motor performance data, thereby improving the design of the motor based on the measured data.
The patent name of the publication number is CN106941299A, and the publication number is written in a device and a method for detecting the temperature of motor rotor magnetic steel in real time, and the device comprises a temperature measuring device and a temperature signal receiving device, wherein the temperature measuring device is fixed on a motor rotating shaft and is connected to the rotor magnetic steel through a temperature measuring end, and the temperature signal receiving device is fixed on the inner side of a motor end cover. Two temperature measuring wires of different material conductors are adopted, when temperature difference exists between a temperature measuring end and a reference end, potential difference is formed in the temperature measuring wires to generate current, and in motor operation, the primary sides of the temperature measuring wires and the temperature signal receiving device rotate at high speed to form a rotating magnetic field, and according to an electromagnetic induction principle, the magnetic steel temperature measured by the temperature measuring device can be obtained from secondary side coil current.
In the scheme, the measuring position of the temperature measuring device is constant, the temperature of different positions of the magnetic steel cannot be measured, and the measured data is not comprehensive enough.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to solve the technical problems that a temperature measuring structure of rotor magnetic steel of a permanent magnet motor and the permanent magnet motor are provided for solving the problems that the motor in the prior art cannot measure temperature at different positions of the magnetic steel and the like.
The technical scheme adopted by the utility model for solving the technical problems is that the temperature measuring structure of the rotor magnetic steel of the permanent magnet motor comprises a rotor and a plurality of magnetic steels arranged on the peripheral wall surface of the rotor, a gap with the length along the axial direction of the rotor is arranged between any two magnetic steels, and the temperature measuring structure comprises the following components:
the end cover is arranged at the end part of the rotor, a through hole penetrating through the inner wall and the outer wall of the end cover is formed in the end cover, and the distance from the through hole to the axis of the rotating shaft of the rotor is equal to the distance from the gap to the axis of the rotating shaft;
one end of the temperature measuring guide rod can penetrate through the through hole and extend into any position of the gap.
Further, a thermocouple is arranged at one end of the temperature measuring guide rod extending into the gap.
Further, the device further comprises a plug, and the plug is detachably arranged in the through hole.
Further, an inner wall surface of the through hole is provided with an inner thread, the plug is provided with an outer thread, and the outer thread is meshed with the inner thread.
Further, the rotor is also provided with a wireless temperature measurement module, which comprises a temperature measurement probe arranged in the gap and a communication unit arranged on the rotating shaft of the rotor.
Further, the communication unit includes a built-in battery for supplying power.
Further, the communication unit comprises an outer shell, and the outer shell is detachably connected with the rotating shaft.
Further, a chain rope is wound on the rotating shaft of the rotor, and two ends of the chain rope are respectively connected with two sides of the outer shell.
Further, a permanent magnet motor is also disclosed, which comprises at least one temperature measuring structure of the rotor magnetic steel of the permanent magnet motor.
Compared with the prior art, the utility model has at least the following beneficial effects:
the distance from the through hole to the rotating shaft is equal to the distance from the gap to the rotating shaft, and the rotor can be rotated to drive the gaps at different positions to align with the through hole, so that the temperature measuring guide rod stretches into the gaps at different positions to measure the temperature; meanwhile, the temperature measuring guide rod can measure the temperature of different axial positions of the magnetic steel by adjusting the depth of the temperature measuring guide rod extending into the gap. Therefore, the temperature measuring guide rod can measure the temperature of any position on any magnetic steel, and the measured temperature data is more comprehensive.
Drawings
FIG. 1 is a cross-sectional view of a thermometric structure in an embodiment;
FIG. 2 is a cross-sectional view at A-A in FIG. 1;
FIG. 3 is a schematic diagram of a temperature measuring guide bar in an embodiment;
in the figure:
100. a rotor; 110. magnetic steel; 111. a gap; 120. a rotating shaft;
200. an end cap; 210. A plug;
300. a temperature measuring guide rod; 310. A thermocouple;
400. a wireless temperature measurement module; 410. a temperature measurement probe; 420. a communication unit; 430. a chain rope.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
Referring to fig. 1-3, the utility model discloses a temperature measurement structure of a rotor magnet of a permanent magnet motor, the permanent magnet motor includes a rotor 100 and a plurality of magnet steels 110 disposed on a peripheral wall surface of the rotor 100, a gap 111 having a length along an axial direction of the rotor 100 is provided between any two magnet steels 110, and the temperature measurement structure includes:
the end cover 200 is arranged at the end part of the rotor 100, the end cover 200 is provided with through holes penetrating through the inner wall and the outer wall of the end cover 200, and the distance from the through holes to the axis of the rotating shaft 120 of the rotor 100 is equal to the distance from the gap 111 to the axis of the rotating shaft 120;
the one end of the temperature measuring guide rod 300 can pass through the through hole and extend into any arbitrary position of the gap 111.
The end cover 200 is provided with a through hole, and the temperature measuring guide rod 300 passes through the through hole and stretches into the gap 111 to measure the temperature of the magnetic steel 110. Wherein, since the distance from the through hole to the rotating shaft 120 is equal to the distance from the gap 111 to the rotating shaft 120, the rotor 100 can be rotated to drive the gaps 111 at different positions to align with the through hole, so that the temperature measuring guide rod 300 stretches into the gaps 111 at different positions to measure the temperature; meanwhile, by adjusting the depth of the temperature measuring guide rod 300 extending into the gap 111, the temperature measuring guide rod 300 can measure the temperature of different axial positions of the magnetic steel 110. Therefore, the temperature measuring guide rod 300 can measure the temperature of any position on any magnetic steel 110, and the measured temperature data is more comprehensive.
Specifically, after the motor rotates for a period of time, stopping running, enabling the temperature measuring guide rod 300 to penetrate through the through hole and extend into the magnetic rigidity position to be tested in the gap 111, respectively measuring actual temperatures of multiple points at intervals of a certain time, recording the motor rotation stopping time and the time of each reading point, and drawing by adopting a curve fitting method which is the same as that of a motor temperature rise test; and taking out the temperature measuring guide rod 300 after the test is finished.
Further, a thermocouple 310 is disposed at one end of the temperature measuring guide 300 extending into the gap 111.
Thermocouple 310 may be used to measure the temperature of the surface of magnetic steel 110. Wherein, one end of the temperature measuring guide 300 provided with the thermocouple 310 is bent, so that the thermocouple 310 can extend into the gap 111 along the axial direction of the rotor 100 and measure towards the side of the magnetic steel 110.
Further, a plug 210 is further included, and the plug 210 is detachably disposed in the through hole.
The plug 210 is arranged and detachably connected with the through hole, and when temperature measurement is not needed, the plug 210 can be arranged to seal the through hole so as to prevent dust and other impurities in the external environment from entering the motor; when the temperature measurement is needed, the through hole can be exposed by removing the plug 210, and then the temperature measurement guide rod 300 can extend into the motor from the through hole.
Further, an inner wall surface of the through hole is provided with an internal thread, and the plug 210 is provided with an external thread, and the external thread is engaged with the internal thread.
The plug 210 is in threaded connection with the through hole, and the plug 210 can be assembled or disassembled by rotating the plug 210, so that the plug 210 can be detachably connected.
Further, the rotor 100 is further provided with a wireless temperature measuring module 400, which includes a temperature measuring probe 410 disposed in the gap 111, and a communication unit 420 mounted on the rotating shaft 120 of the rotor 100.
The wireless temperature measurement module 400 is disposed on the rotor 100 and rotates along with the rotor 100, and can measure temperature during electronic operation. Specifically, the temperature probe 410 measures the temperature of the magnetic steel 110 and transmits the measured temperature to the mobile terminal through the communication unit 420.
Further, the communication unit 420 includes a built-in battery for supplying power.
Specifically, the communication unit 420 is internally provided with a built-in battery, and no external power supply is needed, i.e. no wires are needed to be arranged for connecting an external power supply.
Further, the communication unit 420 includes an outer housing detachably connected to the rotating shaft 120.
The rotating shaft 120 of the rotor 100 is wound with a chain rope 430, and two ends of the chain rope 430 are respectively connected with two sides of the outer shell.
Specifically, the communication unit 420 is installed and fixed by winding the chain rope 430 at both sides of the outer case around the rotation shaft 120.
Further, a permanent magnet motor is also disclosed, which comprises at least one temperature measuring structure of the rotor magnetic steel of the permanent magnet motor.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Claims (9)
1. The utility model provides a temperature measurement structure of permanent magnet motor rotor magnet steel, permanent magnet motor includes rotor and a plurality of setting are in magnet steel on the rotor periphery wall, arbitrary two have the length along between the magnet steel the clearance of rotor axial, its characterized in that includes:
the end cover is arranged at the end part of the rotor, a through hole penetrating through the inner wall and the outer wall of the end cover is formed in the end cover, and the distance from the through hole to the axis of the rotating shaft of the rotor is equal to the distance from the gap to the axis of the rotating shaft;
one end of the temperature measuring guide rod can penetrate through the through hole and extend into any position of the gap.
2. The structure for measuring temperature of rotor magnetic steel of permanent magnet motor according to claim 1, wherein a thermocouple is arranged at one end of the temperature measuring guide rod extending into the gap.
3. The structure for measuring temperature of rotor steel as recited in claim 1 further comprising a plug removably disposed in said through hole.
4. The temperature measurement structure of claim 3, wherein the inner wall surface of the through hole is provided with an internal thread, the plug is provided with an external thread, and the external thread is meshed with the internal thread.
5. The temperature measurement structure of claim 1, wherein the rotor is further provided with a wireless temperature measurement module, and the wireless temperature measurement module comprises a temperature measurement probe arranged in the gap and a communication unit arranged on a rotating shaft of the rotor.
6. The structure of claim 5, wherein the communication unit includes a built-in battery for supplying power.
7. The structure of claim 5, wherein the communication unit comprises an outer housing detachably connected to the shaft.
8. The structure for measuring the temperature of the rotor magnetic steel of the permanent magnet motor according to claim 7, wherein a chain rope is wound on a rotating shaft of the rotor, and two ends of the chain rope are respectively connected with two sides of the outer shell.
9. A permanent magnet motor comprising at least one temperature measuring structure of a rotor magnet steel of a permanent magnet motor according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321508626.4U CN220022539U (en) | 2023-06-14 | 2023-06-14 | Temperature measurement structure of permanent magnet motor rotor magnetic steel and permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321508626.4U CN220022539U (en) | 2023-06-14 | 2023-06-14 | Temperature measurement structure of permanent magnet motor rotor magnetic steel and permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220022539U true CN220022539U (en) | 2023-11-14 |
Family
ID=88674103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321508626.4U Active CN220022539U (en) | 2023-06-14 | 2023-06-14 | Temperature measurement structure of permanent magnet motor rotor magnetic steel and permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220022539U (en) |
-
2023
- 2023-06-14 CN CN202321508626.4U patent/CN220022539U/en active Active
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