CN211456941U - Motor rotor temperature monitoring device - Google Patents

Abstract

The utility model discloses a temperature monitoring device for a motor rotor, which can relatively accurately acquire temperature signals at different positions of the motor rotor, and can also form a power supply through a first power supply control circuit and a second power supply control circuit to supply power to a first temperature sensing module , therefore, the first temperature sensing module can provide electrical energy to multiple temperature sensors installed at different positions of the motor rotor through the continuously obtained electrical energy, so that each temperature sensor can continuously monitor the temperature signals at different positions of the motor rotor, and finally can know the motor The temperature signal that the rotor continuously changes during the rotation process, and in the process of supplying power to the first temperature sensing module by the power supply, it will not be affected by the rotation of the motor rotor, and its service cycle is long and the service life is high, which can also be reduced. maintenance costs.

Description

A kind of motor rotor temperature monitoring device

technical field

The utility model relates to the technical field of motor rotor temperature detection, in particular to a motor rotor temperature monitoring device.

Background technique

With the development of electrification and intelligence, the application of electric drive systems is becoming more and more extensive, and the motor is the core power drive component of the electric drive system and plays an important role in the electric drive system. The motor converts mechanical energy into electrical energy to generate driving torque, and is also used as a power source for electrical appliances or various machinery. Therefore, the motor is becoming more and more important in people's daily life, but because the motor is in the working process, the motor rotor is in a rotating state for a long time, so the motor will generate a lot of heat during the working process, in order to prevent the motor from rotating due to the rotor If the rotor temperature is too high to cause failure or damage, it is necessary to monitor the rotor temperature of the motor.

At present, in the prior art, the rotor temperature estimation algorithm is mainly used to monitor the rotor temperature of the motor, or, the temperature of the rotor of the motor is measured by a temperature sensor installed on the rotor, or the temperature of the rotor of the motor is measured by transmitting electric energy or electrical signals through a slip ring. Among them, to use the rotor temperature estimation algorithm to monitor the rotor temperature of the motor, it is necessary to measure the physical parameter information such as the stator flux linkage, stator current, and stator temperature of the motor, and then calculate the rotor temperature of the motor through the rotor temperature estimation algorithm according to the physical parameter information. Obviously, this The method can only estimate the temperature of the motor rotor indirectly, it is difficult to monitor the temperature change of the motor rotor, and it is difficult to ensure the measurement accuracy of the motor rotor temperature; among them, although the temperature sensor installed on the rotor can know the temperature change of the motor rotor, However, the temperature sensor needs to be continuously powered by the battery, and the battery has limited power. Once the battery is exhausted, it cannot supply power to the temperature sensor, resulting in the inability to measure the temperature of the motor rotor normally; among them, the slip ring is used to measure the temperature of the motor rotor, because the slip ring Structural power supply is a contact-type electrical measurement, which has a limited service life and high maintenance costs.

Utility model content

In view of this, the embodiment of the present invention provides a motor rotor temperature monitoring device to solve the problem of the motor rotor temperature monitoring method in the prior art, which has poor measurement accuracy, it is difficult to monitor the motor rotor temperature change and cannot be continuously monitored. Motor rotor temperature, limited service life, and high maintenance costs.

According to a first aspect, an embodiment of the present invention provides a motor rotor temperature monitoring device, comprising: a motor shaft, a motor rotor and a motor stator, wherein the motor rotor and the motor stator pass through the motor shaft and are parallel to each other settings, which also include:

a first temperature sensing module, mounted on the motor rotor, passing through the motor shaft and concentric with the motor rotor; the first temperature sensing module includes: a plurality of temperature sensing modules arranged at different positions of the motor rotor a sensor and a first power supply control circuit, the plurality of temperature sensors are connected to the first power supply control circuit;

A second temperature sensing module is installed on the motor stator, is arranged in parallel with the first temperature sensing module, and passes through the motor shaft and is concentric with the motor stator; the second temperature sensing module includes: a second temperature sensing module. a power supply control circuit, the second power supply control circuit is connected to the first power supply control circuit;

Wherein, the first power supply control circuit transmits the temperature signals detected by the plurality of temperature sensors respectively to the second power supply control circuit, and the second power supply control circuit and the first power supply control circuit constitute a power supply, The electrical energy output by the power supply supplies power to the first temperature sensing module.

With reference to the first aspect, in a first implementation manner of the first aspect, the first power supply control circuit includes:

a first microcontroller connected to the plurality of temperature sensors;

a first power controller, connected to the first microcontroller;

With reference to the first embodiment of the first aspect, in the second embodiment of the first aspect, the first power supply control circuit further includes:

a first communication transmission device, which is respectively connected with the first microcontroller and the first power supply controller;

The first power signal receiving end is connected to the first power controller, wherein the first power controller controls the first power signal receiving end to output the electrical energy to supply power to the first temperature sensing module.

With reference to the first aspect, in a third implementation manner of the first aspect, the second power supply control circuit includes:

a second communication transmission device, connected to the first communication transmission device;

The second microcontroller is connected with the second communication transmission device.

With reference to the third embodiment of the first aspect, in the fourth embodiment of the first aspect, the second power supply control circuit further includes:

a second power controller, connected to the second microcontroller;

The second power signal transmitting end is connected to the second power controller, and the second power signal transmitting end and the first power signal receiving end constitute the power supply.

With reference to the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the first power signal receiving end is a power supply coil receiving end, and the second power signal receiving end is a power supply coil sending end.

With reference to the first aspect or any embodiment of the first aspect, in a sixth embodiment of the first aspect, the power supply is a power transformer that is concentric with the rotating shaft of the motor.

With reference to the first aspect, in a seventh implementation manner of the first aspect, the first temperature sensing module is a first PCB circuit board.

With reference to the seventh embodiment of the first aspect, in the eighth embodiment of the first aspect, the second temperature sensing module is a second PCB circuit board.

With reference to the eighth embodiment of the first aspect, in the ninth embodiment of the first aspect, the first PCB circuit board is fixedly arranged on the end face of the motor rotor, and rotates synchronously with the motor rotor, and the second PCB circuit board The plate is fixedly arranged on the stator of the motor.

The technical solution of the embodiment of the present utility model has the following advantages:

The utility model provides a motor rotor temperature monitoring device, which can relatively accurately know the temperature signals at different positions of the motor rotor, and can also form a power supply through a first power supply control circuit and a second power supply control circuit to supply power to the first temperature sensing module , therefore, the first temperature sensing module can provide electrical energy to multiple temperature sensors installed on different positions of the motor rotor through the continuously obtained electrical energy, so that each temperature sensor can continuously monitor the temperature signals at different positions of the motor rotor, and finally can know the motor The temperature signal that the rotor continuously changes during the rotation process, and in the process of supplying power to the first temperature sensing module by the power supply, it will not be affected by the rotation of the motor rotor, and its service life is longer and the service life is higher, and it can also be reduced maintenance costs.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a motor rotor temperature monitoring device in an embodiment of the present utility model;

2 is a schematic circuit diagram of a first temperature sensing module in an embodiment of the present invention;

3 is a schematic circuit diagram of a second temperature sensing module in an embodiment of the present invention;

4 is a circuit connection diagram between a first power supply control circuit and a second power supply control circuit in an embodiment of the present invention.

Reference number:

1-motor shaft; 2-motor rotor; 3-motor stator; 4-first temperature sensing module;

5- the second temperature sensing module; 41- temperature sensor; 42- the first power supply control circuit;

51-the second power supply control circuit; 421-the first microcontroller; 422-the first power supply controller;

423 - the first communication transmission device; 424 - the first power signal receiving end;

511-second microcontroller; 512-second power controller;

513 - the second communication transmission device; 514 - the second power signal sending end.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

Example 1

An embodiment of the present invention provides a motor rotor temperature monitoring device, as shown in FIG. 1 , comprising: a motor shaft 1 , a motor rotor 2 and a motor stator 3 , wherein the motor rotor 2 and the motor stator 3 pass through the motor shaft 1 and are parallel to each other. set up. Specifically, the motor rotor 2 belongs to the rotating part in the motor, which can rotate at high speed around the motor shaft 1 and cooperates with the motor stator 3 to realize the conversion of electrical energy and mechanical energy or the conversion of mechanical energy and electrical energy. The motor stator 3 is a motor The main function of the stationary part is to generate a rotating magnetic field, and the main function of the motor rotor 2 is to use the interaction between the rotor magnetic field and the stator rotating magnetic field to generate electromagnetic torque.

Specifically, the motor rotor temperature monitoring device in the embodiment of the present invention, in FIG. 1 , further includes: a first temperature sensing module 4 and a second temperature sensing module 5 . The first temperature sensing module 4 can be a first PCB circuit board, the second temperature sensing module 5 can be a second PCB circuit board, and various electronic components can be arranged on the first PCB circuit board. Various electronic components can be arranged on the circuit board. Therefore, the first temperature sensing module 4 is used for sensing the first sensing information related to the temperature, and the second temperature sensing module 5 is used for sensing the second sensing information related to the temperature, so as to monitor the temperature of the motor rotor 2 . By installing the first PCB circuit board on the end face of the motor rotor 2, and by installing the second PCB circuit board on the motor stator 3, space can be saved, and the rotation of the motor rotor 2 around the motor shaft 1 is facilitated.

In a specific embodiment, in the motor rotor temperature monitoring device in the embodiment of the present invention, in FIG. As shown in FIG. 2 and FIG. 4 , the first temperature sensing module 4 includes: a plurality of temperature sensors 41 and a first power supply control circuit 42 distributed at different positions of the motor rotor 2 , the plurality of temperature sensors 41 and the first power supply control circuit 42 Circuit 42 is connected. Specifically, in FIG. 1, the first temperature sensing module 4 can be fixedly installed on the end face of the motor rotor 2, and is concentric with the motor shaft 1, and can rotate synchronously with the motor rotor 2. When the motor rotor 2 is cylindrical, it is also It can be fixedly installed on the side surface of the motor rotor 2, of course, preferably the first temperature sensing module 4 is fixedly installed on the end surface of the motor rotor 2, so that the temperature signal of the motor rotor 2 can be monitored quickly and accurately.

In addition, in FIG. 2, a plurality of temperature sensors 41 included in the first temperature sensing module 4 are distributed and arranged at different positions on the end face of the motor rotor 2, and the temperature signals at different positions of the motor rotor 2 can be measured, and then the motor rotor can be monitored. The temperature signal of 2 changes, which improves the accuracy of the temperature monitoring of the motor rotor 2. Each temperature sensor 41 is installed in close contact with the motor rotor 2 , which can reduce the gap between each temperature sensor 41 and the motor rotor 2 . In FIG. 4 , the above-mentioned first power control circuit 42 is connected to a plurality of temperature sensors 41 respectively. In FIG. 1 , the first temperature sensing module 4 and the second temperature sensing module 5 constitute a power supply, and the power supply outputs the The electrical energy is transmitted to the first temperature sensing module 4, so that the first temperature sensing module 4 can obtain the electrical energy generated from the power supply.

In another specific embodiment, in the motor rotor temperature monitoring device in the embodiment of the present invention, in FIG. 1 , the second temperature sensing module 5 is installed on the motor stator 3 and is arranged in parallel with the first temperature sensing module 4, Passing through the motor shaft 1 and concentric with the motor stator 3 ; the second temperature sensing module 5 includes: a second power control circuit 51 , as shown in FIG. 4 , the second power control circuit 51 is connected to the first power control circuit 42 . The first power supply control circuit 42 transmits the temperature signals detected by the plurality of temperature sensors 41 to the second power supply control circuit 51. The second power supply control circuit 51 and the first power supply control circuit 42 constitute a power supply, and the power output by the power supply Power is supplied to the first temperature sensing module 4 .

Specifically, in FIG. 1 , the second temperature sensing module 5 may be fixedly installed on the motor stator 3 . In FIG. 4 , the main function of the second power control circuit 51 above is to obtain the temperature signal output by the first temperature sensing module 4 , and it can also form a power supply with the first power control circuit 42 , and the power output from the power supply Energy conversion is performed, and then the converted electrical energy is supplied to the first temperature sensing module 4 .

The motor rotor temperature monitoring device in the embodiment of the present invention can more accurately know the temperature signals at different positions of the motor rotor 2, and can also form a power supply through the first power supply control circuit 42 and the second power supply control circuit 51 to provide the first temperature The induction module 4 is powered, therefore, the first temperature induction module 4 can continuously obtain electric energy, so that a plurality of temperature sensors 41 installed at different positions of the motor rotor 2 can continuously monitor the temperature signals at different positions of the motor rotor 2, and then can know the motor rotor 2. The temperature signal that changes continuously during the rotation process, and in the process of supplying power to the first temperature sensing module 4 by the power supply, will not be affected by the rotation of the motor rotor 2, and its service cycle is long and the service life is high, which can be reduced maintenance costs.

Example 2

An embodiment of the present utility model provides a motor rotor temperature monitoring device. As a preferred implementation, as shown in FIG. 1 , this embodiment includes: a motor shaft 1 , a motor rotor 2 and a motor stator 3 , wherein the motor rotor 2 and the motor The stator 3 passes through the motor shaft 1 and is arranged in parallel. Specifically, the motor rotor 2 belongs to the rotating part in the motor, which can rotate at high speed around the motor shaft 1 and cooperates with the motor stator 3 to realize the conversion of electrical energy and mechanical energy or the conversion of mechanical energy and electrical energy. The motor stator 3 is a motor The main function of the stationary part is to generate a rotating magnetic field, and the main function of the motor rotor 2 is to use the interaction between the rotor magnetic field and the stator rotating magnetic field to generate electromagnetic torque.

Specifically, the temperature monitoring device of the motor rotor 2 in the embodiment of the present invention, in FIG. 1 , further includes: a first temperature sensing module 4 and a second temperature sensing module 5 . The first temperature sensing module 4 can be a first PCB circuit board, the second temperature sensing module 5 can be a second PCB circuit board, and various electronic components can be arranged on the first PCB circuit board. Various electronic components can be arranged on the circuit board. Therefore, the first temperature sensing module 4 is used for sensing the first sensing information related to the temperature, and the second temperature sensing module 5 is used for sensing the second sensing information related to the temperature, so as to monitor the temperature of the motor rotor 2 . By installing the first PCB circuit board on the end face of the motor rotor 2, and by installing the second PCB circuit board on the motor stator 3, space can be saved, and the rotation of the motor rotor 2 around the motor shaft 1 is facilitated.

In addition, in FIG. 2, a plurality of temperature sensors 41 included in the first temperature sensing module 4 are distributed and arranged at different positions on the end face of the motor rotor 2, and the temperature signals at different positions of the motor rotor 2 can be measured, and then the motor rotor can be monitored. The temperature signal of 2 changes, which improves the accuracy of the temperature monitoring of the motor rotor 2. Each temperature sensor 41 is installed in close contact with the motor rotor 2 , which can reduce the gap between each temperature sensor 41 and the motor rotor 2 . The first power supply control circuit 42 described above is respectively connected with a plurality of temperature sensors 41. In FIG. 1, the first temperature sensing module 4 and the second temperature sensing module 5 constitute a power supply, and the power output from the power supply is transmitted to the first temperature sensor 41. A temperature sensing module 4, so that the first temperature sensing module 4 can obtain the electric energy generated from the power supply.

Specifically, in FIG. 1 , the second temperature sensing module 5 may be fixedly installed on the motor stator 3 . In FIG. 4 , the main function of the second power supply control circuit 51 is to obtain the temperature signal output by the first temperature sensing module 4, and it can also form a power supply with the first power supply control circuit 42, and the output of the power supply The electrical energy is converted into energy, and then the converted electrical energy is supplied to the first temperature sensing module 4 .

In a specific embodiment, the motor rotor temperature monitoring device in the embodiment of the present invention, as shown in FIG. 4 , the first power supply control circuit 42 in the above includes:

In FIG. 2 or FIG. 4 , the first microcontroller 421 is connected to a plurality of temperature sensors 41 . The first microcontroller 421 here can be a control chip, which is used to convert the temperature signals detected by the plurality of temperature sensors 41 into digital signals, which is equivalent to an A/D conversion device. The first microcontroller 421 is an electronic component arranged on the first PCB circuit board.

In FIG. 2 or FIG. 4 , the first power controller 422 is connected to the first microcontroller 421 . The first power controller 422 here can also be a control chip, which mainly plays the role of power conversion, and supplies power to the first temperature sensing module 4 through the converted power. The first power controller 422 also belongs to the electronic components arranged on the first PCB circuit board.

In a specific embodiment, the temperature monitoring device of the motor rotor 2 in the embodiment of the present invention, in FIG. 4 , the first power control circuit 42 further includes:

In FIG. 2 or FIG. 4 , the first communication transmission device 423 is connected to the first microcontroller 421 and the first power controller 422 respectively. The first communication transmission device 423 here may be a Bluetooth controller, which is used to control wireless signal transmission according to the Bluetooth wireless communication protocol. The first communication transmission device 423 also belongs to the electronic components arranged on the first PCB circuit board.

In FIG. 2 or FIG. 4 , the first power signal receiving end 424 is connected to the first power controller 422 , wherein the first power controller 422 controls the first power signal receiving end 424 to output the second power as the first temperature sensor Module 4 is powered. Specifically, the first power signal receiving end 424 may be a power supply coil receiving end, and the first power controller 422 controls the first power signal receiving end 424 to convert the wirelessly transmitted power into a stable voltage and a certain power based on the first communication transmission device 423. A voltage source with current supply capability, which is used to supply power to the first temperature sensing module 4 . The first power signal receiving end 424 also belongs to the electronic components arranged on the first PCB circuit board.

In another specific embodiment, the motor rotor temperature monitoring device in the embodiment of the present invention, as shown in FIG. 4 , the second power control circuit 51 in the above includes:

In FIG. 4 , the second communication transmission device 513 is connected to the first communication transmission device 423 . The second communication transmission device 513 here may be a Bluetooth controller, which is used to control wireless signal transmission according to the Bluetooth wireless communication protocol, and establish a wireless communication network with the first communication transmission device 423 .

In FIG. 3 or FIG. 4 , the second microcontroller 511 is connected to the second communication transmission device 513 . The second microcontroller 511 here can also be a control chip, and the second microcontroller 511 can be connected to the second communication transmission device 513 through a serial communication bus, and is mainly used to obtain information from the first communication transmission device 513 from the second communication transmission device 513 . The temperature signal transmitted by the temperature sensing module 4 through the first communication transmission device 423 . The second microcontroller 511 is an electronic component arranged on the second PCB circuit board.

In another specific embodiment, in the temperature monitoring device of the motor rotor 2 in the embodiment of the present invention, in FIG. 4 , the second power supply control circuit 51 further includes:

In FIG. 3 or FIG. 4 , the second power controller 512 is connected to the second microcontroller 511 . The second power supply controller 512 here may also be a control chip, and the second power supply controller 512 here also belongs to an electronic component arranged on the second PCB circuit board.

In FIG. 3 or FIG. 4 , the second power signal transmitter 514 is connected to the second power controller 512 , and the second power signal transmitter 514 and the first power signal receiver 424 form a power supply. Specifically, the second power signal sending end 514 may be a power supply coil sending end, the second power controller 512 controls the second power signal sending end 514 to convert the stable voltage source in the second power induction module into alternating current, and the second power signal The transmitting end 514 and the first power signal receiving end 424 constitute a power supply, and the first temperature sensing module 4 is provided with electrical energy through the power supply.

In a specific embodiment, in the motor rotor temperature monitoring device in the embodiment of the present invention, the power supply is a power transformer concentric with the motor shaft 1 . For example: the second power supply controller 512 of the second temperature sensing module 5 controls the power supply coil transmitting end to convert the output stable voltage source of the second temperature sensing module 5 into alternating current through the power supply coil transmitting end and the power supply coil of the first temperature sensing module 4 to receive A concentric transformer is formed at the end of the motor, so as to transmit the electric energy from the stator side of the motor to the rotor side of the motor to supply power to the first temperature sensing module 4 of the motor rotor 2 . The power transformer is a concentric transformer, which is concentric with the motor shaft 1 . Therefore, the motor rotor temperature monitoring device in this embodiment is powered by a concentric transformer, and can continuously provide electrical energy to the multiple temperature sensors 41 in the first temperature sensing module 4. There is no need to worry about the installation of batteries during the power supply process. Exhausted, the temperature sensor 41 cannot be powered, which affects the normal operation of the motor rotor 2, and the concentric transformer belongs to non-contact power transmission, which is not affected by the rotation of the motor rotor 2 during the power transmission process, and can be used for a long time. Its service life is relatively high. , maintenance-free.

In the motor rotor temperature monitoring device according to the embodiment of the present invention, the first PCB circuit board is fixedly arranged on the end face of the motor rotor 2 and rotates synchronously with the motor rotor 2 , and the second PCB circuit board is fixedly arranged on the motor stator 3 . The first PCB circuit board is fixedly arranged on the end face of the motor rotor 2, and rotates synchronously with the motor rotor 2, so that the temperature signal change of the motor rotor 2 can be monitored in real time. In addition, the same coils are arranged in the center of the second PCB circuit board on the motor stator side and the first PCB circuit board on the motor rotor side. The coils are formed by PCB wiring. The two coils are concentric with the motor shaft 1, one is located on the motor stator side, the other Located on the rotor side of the motor, due to the concentric arrangement of the two coils, no matter how the motor rotor 2 rotates, the two coils can always form a concentric transformer, which can realize wireless transmission of electric energy through electromagnetic induction, and transmit the electric energy from the second temperature induction module 5 on the stator side of the motor. To the first temperature sensing module 4, the wireless power supply of the first temperature sensing module 4 on the rotor side of the motor is realized.

In the motor rotor temperature monitoring device in the embodiment of the present invention, the second temperature sensing module 5 on the motor stator side transmits electrical energy to the first temperature sensing module 4 on the motor rotor side through a concentric transformer formed by concentric coils, and is the first temperature sensing module 4 on the motor rotor side. The module 4 supplies power, and the first temperature sensing module 4 on the motor rotor side collects the temperature signal of the motor rotor 2 and transmits it to the second temperature sensing module 5 on the motor stator side through the Bluetooth controller, thereby completing the physical measurement of the temperature of the motor rotor 2 . In addition, the temperature signal and electric energy transmission in the embodiment of the present invention adopts a non-contact method, and the problem of wireless power supply under different motor speeds is solved by setting a concentric transformer composed of two coils concentric with the motor shaft 1, which can realize the Accurate physical measurement of the temperature field at multiple locations of the motor rotor 2.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. An electric machine rotor temperature monitoring device comprising: motor shaft, electric rotor and motor stator, wherein, electric rotor with motor stator passes motor shaft and parallel arrangement, its characterized in that still includes:

the first temperature sensing module is arranged on the motor rotor and penetrates through the motor rotating shaft to be concentric with the motor rotor; the first temperature sensing module includes: the temperature sensors and the first power supply control circuit are distributed on different positions of the motor rotor, and the temperature sensors are connected with the first power supply control circuit;

the second temperature sensing module is arranged on the motor stator, is parallel to the first temperature sensing module and penetrates through the motor rotating shaft to be concentric with the motor stator; the second temperature sensing module includes: the second power supply control circuit is connected with the first power supply control circuit;

the first power supply control circuit transmits temperature signals respectively detected by the temperature sensors to the second power supply control circuit, the second power supply control circuit and the first power supply control circuit form a power supply, and electric energy output by the power supply supplies power to the first temperature sensing module.

2. The electric machine rotor temperature monitoring device of claim 1, wherein the first power control circuit comprises:

a first microcontroller connected to the plurality of temperature sensors;

and the first power supply controller is connected with the first microcontroller.

3. The electric machine rotor temperature monitoring apparatus of claim 2, wherein the first power control circuit further comprises:

the first communication transmission device is respectively connected with the first microcontroller and the first power supply controller;

and the first power supply controller controls the first power supply signal receiving end to output the electric energy to supply power for the first temperature sensing module.

4. The electric machine rotor temperature monitoring device of claim 3, wherein the second power control circuit comprises:

the second communication transmission device is connected with the first communication transmission device;

and the second microcontroller is connected with the second communication transmission device.

5. The electric machine rotor temperature monitoring apparatus of claim 4, wherein the second power control circuit further comprises:

the second power supply controller is connected with the second microcontroller;

and the second power signal sending end is connected with the second power controller, and the second power signal sending end and the first power signal receiving end form the power supply.

6. The apparatus according to claim 5, wherein the first power signal receiving terminal is a power coil receiving terminal, and the second power signal receiving terminal is a power coil sending terminal.

7. An electric machine rotor temperature monitoring apparatus according to any of claims 1 to 6, in which the power supply is a power transformer concentric with the machine shaft.

8. The electric machine rotor temperature monitoring device of claim 1, wherein the first temperature sensing module is a first PCB circuit board.

9. The electric machine rotor temperature monitoring device of claim 8, wherein the second temperature sensing module is a second PCB circuit board.

10. The apparatus according to claim 9, wherein the first PCB is fixedly disposed on an end surface of the motor rotor to rotate synchronously with the motor rotor, and the second PCB is fixedly disposed on the motor stator.

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