CN116418177A - Non-contact motor rotor temperature detection method based on mutual inductance principle - Google Patents
Non-contact motor rotor temperature detection method based on mutual inductance principle Download PDFInfo
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- CN116418177A CN116418177A CN202310394783.5A CN202310394783A CN116418177A CN 116418177 A CN116418177 A CN 116418177A CN 202310394783 A CN202310394783 A CN 202310394783A CN 116418177 A CN116418177 A CN 116418177A
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- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 47
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 46
- 230000006698 induction Effects 0.000 claims description 35
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 229910052697 platinum Inorganic materials 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- 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
-
- 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
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/35—Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention belongs to the field of motor manufacturing, and relates to a non-contact motor rotor temperature detection method based on a mutual inductance principle. The invention adopts a mode that molybdenum disulfide material is glued on a rotor of a motor, adopts a non-contact coil mutual inductance principle to supply power to the molybdenum disulfide material, then transmits a voltage signal output by the molybdenum disulfide material to a signal receiver in a non-contact coil mutual inductance principle, a signal amplifier in the signal receiver amplifies an alternating voltage signal, thereby obtaining an amplified alternating voltage peak value signal, and tabulates the relationship between the temperature and the alternating voltage peak value, an AD converter is arranged in the signal receiver to convert an analog signal in the table into a digital signal, the characteristic that the voltage of the molybdenum disulfide material changes along with the temperature is stored in a flash area of the signal receiver in a tabular mode, and when the voltage digital signal is input, the temperature of the motor rotor is output in a table lookup calculation mode.
Description
Technical field:
the invention belongs to the field of motor manufacturing, and particularly relates to a non-contact motor rotor temperature detection method based on a mutual inductance principle.
The background technology is as follows:
the motor is a device for converting electric energy into mechanical energy, and the motor generates a rotating magnetic field by using an electrified coil and acts on a rotor to form magneto-electric power rotating torque. The motors are divided into direct current motors and alternating current motors according to different power supplies, and most of motors in a power system are alternating current motors, and can be synchronous motors or asynchronous motors. The motor mainly comprises a stator and a rotor, the direction of forced movement of an electrified wire in a magnetic field is related to the current direction and the magnetic field direction, and the working principle of the motor is that the motor rotates under the action of the magnetic field on the current.
Since the rotor is operated at a high speed when the motor is operated, temperature detection during operation of the motor is difficult. The method which is relatively commonly used at present is to detect the temperature of the stator winding and then calculate the temperature of the rotor permanent magnet by using the temperature of the stator, however, the method is not particularly accurate and has a certain delay in detecting the temperature of the rotor. Although the infrared heat induction technology can acquire the temperature of the motor, the additional hardware cost is required, the defect of the motor structure can be caused, and the application range is small. Therefore, the working temperature of the motor rotor permanent magnet is accurately calculated and measured, various performance design indexes of the motor can be improved, and safe and stable operation of the motor is ensured.
Disclosure of Invention
The invention provides a scheme aiming at solving the problems, and aims to directly, quickly and accurately detect the temperature of the motor rotor under the condition that the motor rotor runs at a high speed, and simultaneously, the invention is beneficial to improving the reliability of an electric driving system. The invention adopts a molybdenum disulfide material to be glued on a rotor of a motor, adopts a mode of no-sensor coil transmission to supply power to the molybdenum disulfide material, then transmits a voltage signal output by the molybdenum disulfide material to a signal receiver in a mode of no-sensor coil transmission, a signal amplifier in the signal receiver amplifies an alternating voltage signal, thereby obtaining an amplified alternating voltage peak value signal, and tabulates the relationship between the temperature and the alternating voltage peak value, an AD converter is arranged in the signal receiver to convert an analog signal in the table into a digital signal, the characteristic that the voltage of the molybdenum disulfide material changes along with the temperature is stored in a flash area of the signal receiver in a tabular mode, and when the voltage digital signal is input, the temperature of the motor rotor is output in a table lookup calculation mode.
The invention discloses a non-contact motor rotor temperature detection method based on a mutual inductance principle, which comprises the following steps:
molybdenum disulfide material: after a stable voltage is input to the molybdenum disulfide material, the molybdenum disulfide material can output different voltage values according to different temperatures.
A signal receiver: the single-chip microcomputer and the signal amplifier are built in, so that alternating current signals output by the molybdenum disulfide material can be amplified, the resolution ratio of the alternating current signals is improved, the amplified voltage signal analog quantity is converted into digital quantity through the AD converter in the single-chip microcomputer, and the digital quantity is stored through the flash area in the single-chip microcomputer.
Resistance of platinum metal: the metal platinum has good conductivity, the resistivity of the metal platinum is very low, and the metal platinum is a good low-temperature drift resistance material.
Step one: preparing a molybdenum disulfide material K value characteristic table:
connecting an alternating current power supply to the input end of the molybdenum disulfide material, connecting the output end of the molybdenum disulfide material to a signal receiver, providing stable alternating voltage for the molybdenum disulfide material, applying a temperature t to the molybdenum disulfide material by using a heater, and setting the temperature t to be in a temperature interval of 1 ，t m ]Measuring alternating voltage values of molybdenum disulfide materials at different temperatures by taking n as a temperature interval, amplifying the alternating voltage values by C times through a signal amplifier in a signal receiver to obtain an amplified alternating voltage peak value U, measuring a K value between two adjacent groups of data by using a formula (1), tabulating the relation between the temperature t, the alternating voltage peak value U and the K value, wherein the signal receiver is internally provided withThe AD converter converts the analog signals in the table into digital signals and then stores the digital signals into a flash working area of the signal receiver;
wherein K is i Represents the slope between the temperature and the voltage of the ith section, U i Representing the voltage data starting point of the ith segment, U i+1 Indicating the termination point of the ith section voltage data; t is t i Indicating the temperature data starting point, t of the ith section i+1 Indicating the termination point of the i-th segment of temperature data;
step two: and (3) equipment installation:
the molybdenum disulfide material is glued on the rotor, the rotor induction coil is connected with a lead a, the lead a is connected with a metal platinum resistor, the lead a is connected with the rotor output coil, the rotor output coil is connected with a lead b, the lead b is connected with the molybdenum disulfide material, the lead b is connected with the rotor induction coil, the bearing a and the bearing b are fixed on the rotor through shaft shoulder positioning, the signal receiver is welded on the stator, the front end cover is connected with the stator through bolts and nuts, and the rear end cover is connected with the stator through screws.
Step three: the working mode is as follows:
the external power supply b supplies power to the stator coil to generate a magnetic field, so that the rotor starts to rotate under the action of the magnetic field, the rotor induction coil glued on the rotor rotates with the rotor output coil, the external power supply a supplies power to the stator induction coil to generate the magnetic field, the rotor induction coil cuts the magnetic field generated by the stator induction coil, the rotor induction coil generates an alternating current signal, the alternating current signal supplies power to the molybdenum disulfide material and the metal platinum resistor through the wires a and b, the alternating current signal generated by voltage division supplies power to the rotor output coil, the rotor output coil generates the magnetic field, the stator receiving coil cuts the magnetic field generated by the rotor output coil, the stator receiving coil generates an alternating current signal, the signal receiver receives the alternating current signal generated by the stator receiving coil, and the signal amplifier in the signal receiver amplifies the alternating current signal by a factor of C to be U x The signal receiver is provided with an AD converterConverting the amplified AC voltage analog signal into digital signal and recording it as U d Searching in a relation table of temperature, alternating current voltage peak value and K value in a flash working area of the signal receiver; if U is d The current value is the value existing in the relation table of the temperature, the alternating voltage peak value and the K value, and the current value and the U are directly output d Corresponding temperature value t d Will t d The digital signal of (2) is converted into an analog signal and then is output to the actual temperature t of the motor rotor x The method comprises the steps of carrying out a first treatment on the surface of the If U is d Judging the voltage signal value U if the data value existing in the relation table of non-temperature alternating voltage peak value and K value d The minimum interval range [ U ] di ，U di+1 ]So that U di ＜U d ＜U di+1 And look up a table to obtain U di 、t di And K is equal to di U is set up di 、t di And K is equal to di Digital signal of (a) is converted into analog signal to obtain U i 、t i And K is equal to i Then calculating the actual temperature value t of the motor rotor at the moment by using the formula (2) x ：
Thereby obtaining the accurate temperature value t of the current motor rotor x 。
The beneficial effects of the invention are as follows:
1. compared with the method for detecting the temperature of the stator winding and then calculating the temperature of the rotor by utilizing the temperature of the stator, the detection device directly acts on the motor rotor, and has the advantages of being more direct, rapid and accurate.
2. The molybdenum disulfide material used by the detection device is light, thin and flexible, has good heat dissipation and moisture resistance, stable chemical property and grease resistance, and can more accurately measure the working temperature of the motor rotor.
3. The invention adopts the electrifying induction coil to electrify, so that the power supply voltage has adjustability, and can be adjusted to corresponding voltage values according to different working environments, thereby leading the applicability of the detection device to be wider.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings:
FIG. 1 is a schematic view of the overall structure of the device according to the present invention;
FIG. 2 is a schematic diagram showing the internal structure distribution of the device according to the present invention;
FIG. 3 is a schematic diagram of the stator coil structure of the apparatus of the present invention;
FIG. 4 is a schematic diagram of a stator receiving coil of the apparatus of the present invention;
FIG. 5 is a schematic diagram showing the rotor structure distribution of the device according to the present invention;
FIG. 6 is a waveform diagram of an AC voltage signal of the apparatus according to the present invention;
FIG. 7 is a schematic diagram of the relationship between the alternating voltage and the temperature of the molybdenum disulfide material according to the present invention;
in the figure, 1, a front end cover; 2. a bearing a; 3. molybdenum disulfide material; 4. a rotor; 5. a bearing b; 6. a stator; 7. an external power source a; 8. an external power supply b; 9. a signal receiver; 10. a rear end cover; 11. a bolt; 12. a nut; 13. a screw; 14. a stator induction coil; 15. a stator coil; 16. a stator receiving coil; 17. a rotor induction coil; 18. a rotor output coil; 19. a conducting wire a; 20. a wire b; 21. metal platinum resistance.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The structural composition of the present invention is shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, and the specific structure and specific embodiment of the present invention will be further described with reference to the accompanying drawings:
the non-contact motor rotor temperature detection method based on the mutual inductance principle comprises a front end cover (1), a bearing a (2), molybdenum disulfide materials (3), a rotor (4), a bearing b (5), a stator (6), an external power supply a (7), an external power supply b (8), a signal receiver (9), a rear end cover (10), a bolt (11), a nut (12), a screw (13), a stator induction coil (14), a stator coil (15), a stator receiving coil (16), a rotor induction coil (17), a rotor output coil (18), a lead a (19), a lead b (20) and a metal platinum resistor (21); the molybdenum disulfide material (3) is glued on the rotor (4), the rotor induction coil (17) is connected with a wire a (19), the wire a (19) is connected with a metal platinum resistor (21), the wire a (19) is connected with a rotor output coil (18), the rotor output coil (18) is connected with a wire b (20), the wire b (20) is connected with the molybdenum disulfide material (3), the wire b (20) is connected with the rotor induction coil (17), the stator induction coil (14) and the stator coil (15) are wound on the stator (6) and the stator receiving coil (16), the bearing a (2) and the bearing b (5) are fixed on the rotor (4) through shaft shoulder positioning, the external power source a (7) and the external power source b (8) are welded on the stator (6) through a signal receiver (9), the front end cover (1) is connected with the stator (6) through a bolt (11) and a nut (12), and the rear end cover (10) is connected with the stator (6) through a screw (13).
An external power supply b (8) supplies power to the stator coil (15) to generate a magnetic field, so that the rotor (4) starts to rotate under the action of the magnetic field, a rotor induction coil (17) glued on the rotor (4) rotates with a rotor output coil (18), the external power supply a (7) supplies power to the stator induction coil (14) to generate the magnetic field, the rotor induction coil (17) cuts the magnetic field generated by the stator induction coil (14), the rotor induction coil (17) generates an alternating current signal, the alternating current signal supplies power to the molybdenum disulfide material (3) and the metal platinum resistor (21) through a lead a (19) and a lead b (20), the partial pressure generated alternating current signal supplies power to the rotor output coil (18), the rotor output coil (18) generates the magnetic field, the stator receiving coil (16) cuts the magnetic field generated by the rotor output coil (18), and the stator receiving coil (16) generates the alternating current signal, and the signal receiver (9) receives the alternating current signal generated by the stator receiving coil (16).
A non-contact motor rotor temperature detection method based on a mutual inductance principle comprises the following specific implementation processes:
step one: preparing a molybdenum disulfide material K value characteristic table:
connecting an alternating current power supply to the input end of the molybdenum disulfide material, connecting the output end of the molybdenum disulfide material to a signal receiver, providing stable alternating voltage for the molybdenum disulfide material, applying a temperature t to the molybdenum disulfide material by using a heater, and setting the temperature t to be in a temperature interval of 1 ，t m ]Measuring alternating voltage values of the molybdenum disulfide material at different temperatures by taking n as a temperature interval, amplifying the alternating voltage values by C times through a signal amplifier in a signal receiver, thus obtaining an amplified alternating voltage peak value U, measuring a K value between two adjacent groups of data by using a formula (1), tabulating the relation between the temperature t and the alternating voltage peak value U and the K value, and converting analog signals in the table into digital signals by an AD converter in the signal receiver as shown in a table 1, and storing the digital signals in a flash working area of the signal receiver;
wherein K is i Represents the slope between the temperature and the voltage of the ith section, U i Representing the voltage data starting point of the ith segment, U i+1 Indicating the termination point of the ith section voltage data; t is t i Indicating the temperature data starting point, t of the ith section i+1 Indicating the termination point of the i-th segment of temperature data;
TABLE 1
| Temperature t | Voltage U | K value |
| t 1 | U 1 | K 1 |
| t 2 | U 2 | K 2 |
| t 3 | U 3 | K 3 |
| ... | ... | ... |
| t m-1 | U m-1 | K m-1 |
| t m | U m |
Step two: and (3) equipment installation:
the method comprises the steps that a molybdenum disulfide material is glued on a rotor, a rotor induction coil is connected with a lead a, the lead a is connected with a metal platinum resistor, the lead a is connected with a rotor output coil, the rotor output coil is connected with a lead b, the lead b is connected with the molybdenum disulfide material, the lead b is connected with the rotor induction coil, a bearing a and a bearing b are fixed on the rotor through shaft shoulder positioning, a signal receiver is welded on a stator, a front end cover is connected with the stator through a bolt and a nut, and a rear end cover is connected with the stator through a screw;
step three: the working mode is as follows:
the external power supply b supplies power to the stator coil to generate a magnetic field, so that the rotor starts to rotate under the action of the magnetic field, and is glued onThe rotor induction coil and the rotor output coil on the rotor rotate, the external power supply a supplies power to the stator induction coil to generate a magnetic field, the rotor induction coil cuts the magnetic field generated by the stator induction coil, thereby the rotor induction coil generates an alternating current signal, the alternating current signal supplies power to the molybdenum disulfide material and the metal platinum resistor through the lead a and the lead b, the alternating current signal generated by partial pressure supplies power to the rotor output coil, the rotor output coil generates a magnetic field, the stator receiving coil cuts the magnetic field generated by the rotor output coil, thereby the stator receiving coil generates an alternating current signal, the signal receiver receives the alternating current signal generated by the stator receiving coil, and the signal amplifier in the signal receiver amplifies the alternating current signal by C times to be U x The signal receiver is internally provided with an AD converter which converts the amplified alternating voltage analog signal into a digital signal which is recorded as U d Searching in a relation table of temperature, alternating current voltage peak value and K value in a flash working area of the signal receiver; if U is d The current value is the value existing in the relation table of the temperature, the alternating voltage peak value and the K value, and the current value and the U are directly output d Corresponding temperature value t d Will t d The digital signal of (2) is converted into an analog signal and then is output to the actual temperature t of the motor rotor x The method comprises the steps of carrying out a first treatment on the surface of the If U is d Judging the voltage signal value U if the data value existing in the relation table of non-temperature alternating voltage peak value and K value d The minimum interval range [ U ] di ，U di+1 ]So that U di ＜U d ＜U di+1 And look up a table to obtain U di 、t di And K is equal to di U is set up di 、t di And K is equal to di Digital signal of (a) is converted into analog signal to obtain U i 、t i And K is equal to i Then calculating the actual temperature value t of the motor rotor at the moment by using the formula (2) x ：
Thereby obtaining the accurate temperature value t of the current motor rotor x 。
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A non-contact motor rotor temperature detection method based on a mutual inductance principle is characterized by comprising the following steps of: the method comprises the following specific implementation processes:
step one: preparing a molybdenum disulfide material K value characteristic table:
connecting an alternating current power supply to the input end of the molybdenum disulfide material, connecting the output end of the molybdenum disulfide material to a signal receiver, providing stable alternating voltage for the molybdenum disulfide material, applying a temperature t to the molybdenum disulfide material by using a heater, and setting the temperature t to be in a temperature interval of 1 ，t m ]Measuring alternating voltage values of the molybdenum disulfide material at different temperatures by taking n as a temperature interval, amplifying the alternating voltage values by C times through a signal amplifier in a signal receiver, thus obtaining an amplified alternating voltage peak value U, measuring a K value between two adjacent groups of data by using a formula (1), tabulating the relation between the temperature t and the alternating voltage peak value U and the K value, and converting an analog signal in the table into a digital signal by an AD converter in the signal receiver, and storing the digital signal in a flash working area of the signal receiver;
wherein K is i Represents the slope between the temperature and the voltage of the ith section, U i Representing the voltage data starting point of the ith segment, U i+1 Indicating the termination point of the ith section voltage data; t is t i Indicating the temperature data starting point, t of the ith section i+1 Indicating the termination point of the i-th segment of temperature data;
step two: and (3) equipment installation:
the method comprises the steps that a molybdenum disulfide material is glued on a rotor, a rotor induction coil is connected with a lead a, the lead a is connected with a metal platinum resistor, the lead a is connected with a rotor output coil, the rotor output coil is connected with a lead b, the lead b is connected with the molybdenum disulfide material, the lead b is connected with the rotor induction coil, a bearing a and a bearing b are fixed on the rotor through shaft shoulder positioning, a signal receiver is welded on a stator, a front end cover is connected with the stator through a bolt and a nut, and a rear end cover is connected with the stator through a screw;
step three: the working mode is as follows:
the external power supply b supplies power to the stator coil to generate a magnetic field, so that the rotor starts to rotate under the action of the magnetic field, the rotor induction coil glued on the rotor rotates with the rotor output coil, the external power supply a supplies power to the stator induction coil to generate the magnetic field, the rotor induction coil cuts the magnetic field generated by the stator induction coil, the rotor induction coil generates an alternating current signal, the alternating current signal supplies power to the molybdenum disulfide material and the metal platinum resistor through the wires a and b, the alternating current signal generated by voltage division supplies power to the rotor output coil, the rotor output coil generates the magnetic field, the stator receiving coil cuts the magnetic field generated by the rotor output coil, the stator receiving coil generates an alternating current signal, the signal receiver receives the alternating current signal generated by the stator receiving coil, and the signal amplifier in the signal receiver amplifies the alternating current signal by a factor of C to be U x The signal receiver is internally provided with an AD converter which converts the amplified alternating voltage analog signal into a digital signal which is recorded as U d Searching in a relation table of temperature, alternating current voltage peak value and K value in a flash working area of the signal receiver; if U is d The current value is the value existing in the relation table of the temperature, the alternating voltage peak value and the K value, and the current value and the U are directly output d Corresponding temperature value t d Will t d The digital signal of (2) is converted into an analog signal and then is output to the actual temperature t of the motor rotor x The method comprises the steps of carrying out a first treatment on the surface of the If U is d Judging the voltage signal value U if the data value existing in the relation table of non-temperature alternating voltage peak value and K value d The minimum interval range [ U ] di ，U di+1 ]So that U di ＜U d ＜U di+1 And look up a table to obtain U di 、t di And K is equal to di U is set up di 、t di And K is equal to di Digital signal of (a) is converted into analog signal to obtain U i 、t i And K is equal to i Then calculating the actual temperature value t of the motor rotor at the moment by using the formula (2) x ：
Thereby obtaining the accurate temperature value t of the current motor rotor x 。
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| CN202310394783.5A CN116418177A (en) | 2023-04-13 | 2023-04-13 | Non-contact motor rotor temperature detection method based on mutual inductance principle |
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| CN202310394783.5A CN116418177A (en) | 2023-04-13 | 2023-04-13 | Non-contact motor rotor temperature detection method based on mutual inductance principle |
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| CN114485978A (en) * | 2022-02-14 | 2022-05-13 | 湖南大学 | Non-contact temperature measurement method and device based on material conductivity-temperature characteristic |
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2023
- 2023-04-13 CN CN202310394783.5A patent/CN116418177A/en active Pending
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