CN113765255A - Direct cooling system for magnetic steel of motor rotor and magnetic steel temperature measuring method - Google Patents
Direct cooling system for magnetic steel of motor rotor and magnetic steel temperature measuring method Download PDFInfo
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- CN113765255A CN113765255A CN202111218879.3A CN202111218879A CN113765255A CN 113765255 A CN113765255 A CN 113765255A CN 202111218879 A CN202111218879 A CN 202111218879A CN 113765255 A CN113765255 A CN 113765255A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a direct cooling system for magnetic steel of a motor rotor and a magnetic steel temperature measuring method, and relates to the field of motors. The invention can directly cool the magnetic steel, thereby improving the cooling effect. Meanwhile, when the motor is tested, the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium is obtained through the test; when the motor is used, the inlet temperature of the cooling medium, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium are respectively measured, and then the temperature of the magnetic steel can be indirectly obtained by utilizing the corresponding relation, so that the condition that the magnetic steel fails due to overheating can be prevented, cooling adjustment can be performed according to the temperature of the magnetic steel, and the cooling effect is improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a direct cooling system for magnetic steel of a motor rotor and a magnetic steel temperature measuring method.
Background
Because the torque density and the power density of the motor are higher and higher, the requirement on the magnetic steel is higher and higher, and because of the consistency, the problem that part of the magnetic steel is overheated possibly exists under extreme conditions, when the magnetic steel cannot be well cooled, the magnetic steel can be failed, and further the performance of the motor is reduced or even failed, so that how to ensure that the magnetic steel is well cooled is the current problem.
The cooling oil of the existing motor rotor cooling system cools the inside of a motor rotor shaft, and the heat of other parts on the rotor is simply taken away. The magnetic steel is arranged in the silicon steel sheet on the motor shaft, the cooling path is magnetic steel-glue-silicon steel sheet-gap-motor shaft-cooling liquid, and the cooling path is longer, so that the cooling effect on the magnetic steel is poor.
Meanwhile, the temperature of the magnetic steel cannot be measured in the conventional motor rotor cooling system, so that the overheating failure condition of the magnetic steel cannot be pre-judged, and the cooling regulation cannot be performed according to the temperature of the magnetic steel.
The prior Chinese patent with publication number CN103490541A discloses a high-speed motor self-cooling rotor, which comprises a core shaft, a sheath, an iron core, a permanent magnet and a C-shaped magnetic isolation conducting bar, wherein the central groove of the C-shaped magnetic isolation conducting bar forms a cooling channel of the high-speed motor self-cooling rotor, and the tail end of the cooling channel is communicated with an exhaust hole on the sheath; a central hole for cooling air to enter is formed in one end of the high-speed motor self-cooling rotor, the central hole extends to the iron core, and a centrifugal impeller is mounted on the central hole and is close to the iron core.
The cooling path to the permanent magnet can be shortened by using the cooling channel in the above patent, but the temperature of the permanent magnet cannot be measured yet.
Disclosure of Invention
In view of the defects in the prior art, an object of the present invention is to provide a direct cooling system for magnetic steel of a motor rotor, which can not only shorten the cooling path, so that the cooling medium can directly contact with the magnetic steel for cooling, but also obtain the temperature of the magnetic steel, thereby preventing the magnetic steel from failing due to overheating, and can perform cooling adjustment according to the temperature of the magnetic steel, thereby improving the cooling effect.
In order to achieve the purpose, the invention provides the following technical scheme:
a direct cooling system for magnetic steel of a motor rotor, comprising:
one end of the motor shaft extends inwards to form an axial cooling channel, and a first temperature sensor used for measuring the temperature of a cooling medium inlet is arranged at the opening of the axial cooling channel;
a rotor core borne on the motor shaft, magnetic steel embedded in the rotor core, a magnetic steel cooling channel along the axial direction formed between the rotor core and the magnetic steel, and a second temperature sensor for measuring the temperature of the magnetic steel arranged in the magnetic steel cooling channel;
the first magnetic isolation plate is borne at one end of the rotor core, a first impeller opposite to the magnetic steel cooling channel is arranged on the first magnetic isolation plate, and a radial cooling channel communicated with the axial cooling channel and the first impeller is arranged on the motor shaft;
the second magnetic isolation plate is borne at the other end of the rotor core and is provided with a second impeller opposite to the magnetic steel cooling channel; and the number of the first and second groups,
the first end cover is opposite to the second magnetism isolating plate;
the second magnetism isolating plate is provided with a temperature measuring discharge channel communicated with the second impeller, the first end cover is provided with an oil collecting point matched with the temperature measuring discharge channel, and the oil collecting point is provided with a third temperature sensor used for measuring the outlet temperature of the cooling medium.
Another objective of the present invention is to provide a magnetic steel temperature measuring method using the above direct cooling system for magnetic steel of a motor rotor, which can obtain the temperature of the magnetic steel, so as to prevent the magnetic steel from failing due to overheating, and can perform cooling adjustment according to the temperature of the magnetic steel, thereby improving the cooling effect.
In order to achieve the purpose, the invention provides the following technical scheme:
a magnetic steel temperature measurement method applying the direct cooling system for the magnetic steel of the motor rotor comprises the following steps:
s10, when the motor is tested, obtaining the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium through the test;
s20, when the motor is used, the inlet temperature of the cooling medium, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium are respectively measured, and then the temperature of the magnetic steel is obtained by utilizing the corresponding relation in the step S01.
Further, the method also comprises the following steps:
s15, when the motor is tested, the second temperature sensor used for measuring the magnetic steel temperature is cancelled, then the corresponding relation among the cooling medium inlet temperature, the magnetic steel temperature, the cooling medium outlet temperature, the motor rotating speed, the motor torque, the working voltage and the cooling medium flow is obtained through the test, and the corresponding relation is compared with the corresponding relation in the step S10 for verification.
In order to achieve one of the above purposes, the invention also provides the following technical scheme:
a direct cooling system for magnetic steel of a motor rotor, comprising:
one end of the motor shaft extends inwards to form an axial cooling channel, and a first temperature sensor used for measuring the temperature of a cooling medium inlet is arranged at the opening of the axial cooling channel;
the rotor core is borne on the motor shaft, magnetic steel is embedded in the rotor core, and a magnetic steel cooling channel along the axial direction is formed between the rotor core and the magnetic steel;
further comprising:
the first magnetic isolation plate is borne at one end of the rotor core, a first impeller opposite to the magnetic steel cooling channel is arranged on the first magnetic isolation plate, and a radial cooling channel communicated with the axial cooling channel and the first impeller is arranged on the motor shaft;
a second magnetic isolation plate carried at the other end of the rotor core, a second impeller arranged on the second magnetic isolation plate and opposite to the magnetic steel cooling channel, and a second magnetic isolation plate,
the first end cover is opposite to the second magnetism isolating plate;
the second magnetism isolating plate is provided with a temperature measuring discharge channel communicated with the second impeller, the first end cover is provided with an oil collecting point matched with the temperature measuring discharge channel, and the oil collecting point is provided with a third temperature sensor used for measuring the outlet temperature of the cooling medium.
Furthermore, the temperature measurement discharge channel is arranged on the outer end face of the second magnetism isolating plate, and the axis of the temperature measurement discharge channel is intersected with the axis of the motor shaft.
Further, the oil collection point is disposed on the first end cap inner circumferential sidewall.
Furthermore, a flow guide ring matched with the temperature measurement discharge channel is arranged on the first end cover.
Further, the magnetic steel cooling channel comprises a gap channel formed between the rotor core and the magnetic steel.
Further, the first end cover is provided with a plurality of third temperature sensors arranged along the circumferential direction.
Further, the outer circumferential side wall of the first magnetism isolating plate is provided with a first discharge passage communicated with the first impeller, and the outer circumferential side wall of the second magnetism isolating plate is provided with a second discharge passage communicated with the second impeller.
In conclusion, the invention has the following beneficial effects:
1. when the motor rotor rotates, the first impeller and the second impeller rotate along with the motor rotor, and the first impeller guides a cooling medium into the magnetic steel cooling channel from the axial cooling channel, so that the cooling medium is directly contacted with the magnetic steel, and the magnetic steel is directly cooled, so that the cooling path can be shortened, and the cooling effect is improved; meanwhile, the second impeller guides out the cooling medium in the magnetic steel cooling channel, so that the cooling medium is prevented from being accumulated in the rotor core; part of the cooling medium is thrown out to the third temperature sensor through the temperature measurement discharge channel, so that the outlet temperature of the cooling medium can be measured;
2. the first magnetic isolation plate and the second magnetic isolation plate are used as the original structure of the motor, a first impeller is processed on the first magnetic isolation plate or is installed in the first magnetic isolation plate, a second impeller is processed on the second magnetic isolation plate or is installed in the second magnetic isolation plate, and the size of the motor cannot be increased;
3. when the motor is tested, the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium is obtained through the test; when the motor is used, the inlet temperature of the cooling medium, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium are respectively measured, and then the temperature of the magnetic steel can be indirectly obtained by utilizing the corresponding relation, so that the condition that the magnetic steel fails due to overheating can be prevented, cooling adjustment can be performed according to the temperature of the magnetic steel, and the cooling effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of a direct cooling system for magnetic steel of a motor rotor in embodiment 1.
In the figure: 1. a motor shaft; 11. an axial cooling channel; 12. a radial cooling channel; 2. a rotor core; 21. magnetic steel slots; 22. magnetic steel; 3. a first magnetic shield; 31. a first impeller; 32. a first discharge passage; 4. a second magnetic shield; 41. a second impeller; 42. a temperature measurement discharge channel; 43. a second discharge passage; 51. a housing; 52. a first end cap; 53. a second end cap; 531. a flow guide ring; 6. a stator assembly; 7. a third temperature sensor; 8. a second temperature sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
a direct cooling system for magnetic steel of a motor rotor is disclosed, referring to FIG. 1, which comprises a motor shaft 1 and a first end cover 52; one end of the motor shaft 1 extends inwards to form an axial cooling channel 11, and a first temperature sensor (not shown in the drawing) for measuring the temperature of a cooling medium inlet is arranged at the opening of the axial cooling channel 11, wherein the cooling medium is cooling oil in the embodiment; a rotor core 2 is arranged on the motor shaft 1, magnetic steel 22 is embedded in the rotor core 2, a magnetic steel cooling channel along the axial direction is arranged on the rotor core 2, and a second temperature sensor 8 for measuring the temperature of the magnetic steel is arranged in the magnetic steel cooling channel; a first magnetic isolation plate 3 is arranged at one end of the rotor core 2, a first impeller 31 opposite to the magnetic steel cooling channel is arranged on the first magnetic isolation plate 3, and a radial cooling channel 12 communicated with the axial cooling channel 11 and the first impeller 31 is arranged on the motor shaft 1; a second magnetic isolation plate 4 is arranged at the other end of the rotor core 2, and a second impeller 41 opposite to the magnetic steel cooling channel is arranged on the second magnetic isolation plate 4; the second magnetism isolating plate 4 is provided with a temperature measuring discharge channel 42 communicated with the second impeller 41, the first end cover 52 is opposite to the second magnetism isolating plate 4, the first end cover 52 is provided with an oil collecting point matched with the temperature measuring discharge channel 42, and the oil collecting point is provided with a third temperature sensor 7 used for measuring the outlet temperature of the cooling medium; when the motor rotor rotates, the first impeller 31 and the second impeller 41 rotate along with the motor rotor, and the first impeller 31 guides the cooling medium from the axial cooling channel 11 to the magnetic steel cooling channel, so that the cooling medium is directly contacted with the magnetic steel 22, and the magnetic steel 22 is directly cooled, so that the cooling path can be shortened, and the cooling effect is improved; the second impeller 41 guides out the cooling medium in the magnetic steel cooling channel, so that the cooling medium is prevented from being accumulated in the rotor core 2; part of the cooling medium is thrown out to the third temperature sensor 7 through the temperature measurement discharge passage 42, so that the outlet temperature of the cooling medium can be measured.
Referring to fig. 1, specifically, the motor in the present embodiment further includes a housing 51 connected to the first end cap 52, and a second end cap 53 connected to the other end of the housing 51; a stator assembly 6 is arranged on the inner side wall of the shell 51, and a cooling cavity is formed among the motor rotor, the first end cover 52, the shell 51, the second end cover 53 and the stator assembly 6; in this embodiment, the outer circumferential side wall of the first magnetism isolating plate 3 is provided with a first discharge passage 32 communicated with the first impeller 31, so that the cooling medium flows into the cooling cavity through the axial cooling passage 11, the radial cooling passage 12, the first impeller 31 and the first discharge passage 32, and cooling of the stator assembly 6 and circulating flow of the cooling medium are realized; a second discharge channel 43 communicated with the second impeller 41 is arranged on the outer circumferential side wall of the second magnetism isolating plate 4, so that a cooling medium flows into the cooling cavity through the axial cooling channel 11, the radial cooling channel 12, the first impeller 31, the magnetic steel cooling channel, the second impeller 41 and the second discharge channel 43, and cooling of the stator assembly 6 and circulating flow of the cooling medium are realized; of course, in other alternative embodiments, the first discharge channel 32 of the first magnetic shield 3 may be eliminated, and is not limited herein.
Referring to fig. 1, specifically, in this embodiment, a magnetic steel slot 21 is disposed in the rotor core 2, and after the magnetic steel 22 is embedded into the magnetic steel slot 21, a gap channel is left between an end of the magnetic steel 22 and the magnetic steel slot 21, where the gap channel is a magnetic steel cooling channel in this embodiment, and in this embodiment, the magnetic steel cooling channel is used as a direct cooling channel for the magnetic steel 22, and an original structure of the rotor core 2 does not need to be changed; of course, in other alternative embodiments, the magnetic steel cooling channel may also be a direct cooling channel in other structural forms or positions, may also be an indirect cooling channel (i.e., there is a transition layer between the cooling medium and the magnetic steel), or may include multiple types of channels, which are not limited herein; in the present embodiment, the first and second magnetic barriers 3 and 4 are configured as the original motor, and the first impeller 31 is formed on the first magnetic barrier 3 or the first impeller 31 is mounted in the first magnetic barrier 3, and the second impeller 41 is formed on the second magnetic barrier 4 or the second impeller 41 is mounted in the second magnetic barrier 4, so that the size of the motor is not increased.
Referring to fig. 1, in this embodiment, the second temperature sensor 8 is located in the magnetic steel slot 21 and is used for directly measuring the temperature of the magnetic steel 22; of course, the second temperature sensor 8 is also connected to a control unit and a power supply unit which are also arranged in the rotor core 2, so that the data signal of the second temperature sensor 8 can be sent out; the motor in the embodiment is a testing machine, but not an actually used motor, so that the second temperature sensor 8 can be embedded in the rotor core 2 to directly measure the temperature of the magnetic steel 22; in this embodiment, the corresponding relation between the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium can be obtained through tests, when the motor is actually used, the second temperature sensor 8 is cancelled, and the temperature of the magnetic steel can also be indirectly obtained through the corresponding relation, so that the failure condition caused by overheating of the magnetic steel can be prevented, cooling adjustment can be performed according to the temperature of the magnetic steel, and the cooling effect is improved.
Referring to fig. 1, in the present embodiment, the temperature measurement discharge channel 42 is disposed on the outer end surface of the second magnetic shield 4, and the axis of the temperature measurement discharge channel 42 intersects with the axis of the motor shaft 1; specifically, the oil collection point is provided on the inner circumferential side wall of the first end cap 52, and as shown in the drawing, the third temperature sensor 7 is located at the upper left of the thermometric discharge channel 42, so the thermometric discharge channel 42 arranged obliquely facilitates throwing the cooling medium out onto the third temperature sensor 7; of course, in order to avoid the accumulation of the cooling medium at the oil collection point, a liquid drainage structure may be provided on the first end cover 52, which is not limited herein.
Referring to fig. 1, the first end cap 52 is provided with a flow guide ring 531 which is matched with the temperature measurement discharge passage 42, specifically, the flow guide ring 531 is a conical ring in the embodiment, and the small end of the inner diameter thereof is close to the second magnetism isolating plate 4; in this embodiment, the flow guide ring 531 plays two roles, on one hand, plays a role in guiding the cooling medium thrown from the temperature measurement discharge channel 42 to the third temperature sensor 7, and on the other hand, plays a role in separation, so that the cooling medium discharged from the second discharge channel 43 flows into the cooling cavity without flowing back to the third temperature sensor 7, thereby improving the measurement accuracy; preferably, the first end cover 52 is provided with a plurality of circumferentially uniformly distributed third temperature sensors 7, and the second magnetism isolating plate 4 is provided with a plurality of circumferentially uniformly distributed temperature measurement discharge channels 42, so as to improve the measurement accuracy.
Example 2:
a magnetic steel temperature measurement method of a direct cooling system of magnetic steel of a motor rotor in application embodiment 1 comprises the following steps:
and S10, obtaining the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium through tests during motor tests.
S20, when the motor is used, the inlet temperature of the cooling medium, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium are respectively measured, and then the temperature of the magnetic steel is obtained by utilizing the corresponding relation in the step S01.
Of course, in other alternative embodiments, more motor parameters may also be introduced into the corresponding relationship, which is not limited herein.
Preferably, the method further comprises the following steps:
s15, when the motor is tested, the second temperature sensor used for measuring the temperature of the magnetic steel is cancelled, then the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium is obtained through the test, and the corresponding relation is compared with the corresponding relation in the step S10 for verification, so that the accuracy can be improved.
Example 3:
a direct cooling system for magnetic steel of a motor rotor is disclosed, referring to FIG. 1, based on embodiment 1, the embodiment is different from embodiment 1 in that: as a motor to be actually used, the second temperature sensor 8 in the rotor core 2, and the control unit and the power supply unit connected to the second temperature sensor 8 are eliminated in the present embodiment.
Claims (10)
1. The utility model provides a direct cooling system of electric motor rotor magnet steel which characterized in that includes:
one end of the motor shaft extends inwards to form an axial cooling channel, and a first temperature sensor used for measuring the temperature of a cooling medium inlet is arranged at the opening of the axial cooling channel;
the rotor core is borne on the motor shaft, magnetic steel is embedded in the rotor core, a magnetic steel cooling channel is arranged in the rotor core along the axial direction, and a second temperature sensor for measuring the temperature of the magnetic steel is arranged in the magnetic steel cooling channel;
the first magnetic isolation plate is borne at one end of the rotor core, a first impeller opposite to the magnetic steel cooling channel is arranged on the first magnetic isolation plate, and a radial cooling channel communicated with the axial cooling channel and the first impeller is arranged on the motor shaft;
the second magnetic isolation plate is borne at the other end of the rotor core and is provided with a second impeller opposite to the magnetic steel cooling channel; and the number of the first and second groups,
the first end cover is opposite to the second magnetism isolating plate;
the second magnetism isolating plate is provided with a temperature measuring discharge channel communicated with the second impeller, the first end cover is provided with an oil collecting point matched with the temperature measuring discharge channel, and the oil collecting point is provided with a third temperature sensor used for measuring the outlet temperature of the cooling medium.
2. A magnetic steel temperature measurement method using the direct magnetic steel cooling system of the motor rotor of claim 1 is characterized by comprising the following steps:
s10, when the motor is tested, obtaining the corresponding relation among the inlet temperature of the cooling medium, the temperature of the magnetic steel, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow of the cooling medium through the test;
s20, when the motor is used, the inlet temperature of the cooling medium, the outlet temperature of the cooling medium, the rotating speed of the motor, the torque of the motor, the working voltage and the flow rate of the cooling medium are respectively measured, and then the temperature of the magnetic steel is obtained by utilizing the corresponding relation in the step S01.
3. A magnetic steel temperature measurement method according to claim 2, wherein: further comprising the steps of:
s15, when the motor is tested, the second temperature sensor used for measuring the magnetic steel temperature is cancelled, then the corresponding relation among the cooling medium inlet temperature, the magnetic steel temperature, the cooling medium outlet temperature, the motor rotating speed, the motor torque, the working voltage and the cooling medium flow is obtained through the test, and the corresponding relation is compared with the corresponding relation in the step S10 for verification.
4. A direct cooling system for magnetic steel of a motor rotor, comprising:
one end of the motor shaft extends inwards to form an axial cooling channel, and a first temperature sensor used for measuring the temperature of a cooling medium inlet is arranged at the opening of the axial cooling channel;
the rotor core is borne on the motor shaft, magnetic steel is embedded in the rotor core, and a magnetic steel cooling channel along the axial direction is arranged in the rotor core;
it is characterized by also comprising:
the first magnetic isolation plate is borne at one end of the rotor core, a first impeller opposite to the magnetic steel cooling channel is arranged on the first magnetic isolation plate, and a radial cooling channel communicated with the axial cooling channel and the first impeller is arranged on the motor shaft;
a second magnetic isolation plate carried at the other end of the rotor core, a second impeller arranged on the second magnetic isolation plate and opposite to the magnetic steel cooling channel, and a second magnetic isolation plate,
the first end cover is opposite to the second magnetism isolating plate;
the second magnetism isolating plate is provided with a temperature measuring discharge channel communicated with the second impeller, the first end cover is provided with an oil collecting point matched with the temperature measuring discharge channel, and the oil collecting point is provided with a third temperature sensor used for measuring the outlet temperature of the cooling medium.
5. The direct cooling system for magnetic steel of motor rotor according to claim 1 or 4, characterized in that: the temperature measurement discharge channel is arranged on the outer end face of the second magnetism isolating plate, and the axis of the temperature measurement discharge channel is intersected with the axis of the motor shaft.
6. The direct cooling system for magnetic steel of motor rotor according to claim 5, characterized in that: the oil collection point is arranged on the inner circumferential side wall of the first end cover.
7. The direct cooling system for magnetic steel of motor rotor according to claim 5, characterized in that: and a flow guide ring matched with the temperature measurement discharge channel is arranged on the first end cover.
8. The direct cooling system for magnetic steel of motor rotor according to claim 1 or 4, characterized in that: the magnetic steel cooling channel comprises a gap channel formed between the rotor core and the magnetic steel.
9. The direct cooling system for magnetic steel of motor rotor according to claim 1 or 4, characterized in that: the first end cover is provided with a plurality of third temperature sensors arranged along the circumferential direction.
10. The direct cooling system for magnetic steel of motor rotor according to claim 1 or 4, characterized in that: the outer circumferential side wall of the first magnetism isolating plate is provided with a first discharge passage communicated with the first impeller, and the outer circumferential side wall of the second magnetism isolating plate is provided with a second discharge passage communicated with the second impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218879.3A CN113765255A (en) | 2021-10-20 | 2021-10-20 | Direct cooling system for magnetic steel of motor rotor and magnetic steel temperature measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218879.3A CN113765255A (en) | 2021-10-20 | 2021-10-20 | Direct cooling system for magnetic steel of motor rotor and magnetic steel temperature measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113765255A true CN113765255A (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111218879.3A Withdrawn CN113765255A (en) | 2021-10-20 | 2021-10-20 | Direct cooling system for magnetic steel of motor rotor and magnetic steel temperature measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113765255A (en) |
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2021
- 2021-10-20 CN CN202111218879.3A patent/CN113765255A/en not_active Withdrawn
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Application publication date: 20211207 |