Magnetic bearing assembly, detection method thereof, control device, compressor and air conditioner

Abstract

The invention discloses a magnetic bearing assembly and a detection method thereof, a control device, a compressor and an air conditioner, the magnetic bearing assembly comprises a rotating shaft, a target disc, a first detection piece and a second detection piece, and a first peripheral wall is formed on the peripheral side of the rotating shaft; a second peripheral wall opposite to the first peripheral wall is arranged on the target disc; the first detection pieces are arranged on one of the first peripheral wall and the second peripheral wall, and the multiple first detection pieces are periodically arranged in the circumferential direction; the second detection pieces are arranged on the other one of the first peripheral wall and the second peripheral wall, the number of the second detection pieces is multiple, each second detection piece generates a corresponding signal when passing through the first detection piece, and the rotating speed of the rotating shaft is obtained according to the period duration of the signals. According to the magnetic bearing assembly provided by the invention, the plurality of first detection pieces are configured to be periodically arranged in the circumferential direction, each second detection piece can periodically generate the signal, and the period duration of the signal is determined through the time difference between the adjacent signals, so that the rotating speed detection precision of the rotating shaft is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a magnetic bearing assembly and a detection method thereof, a control device, a compressor and an air conditioner. Background Art

[0002] The working principle of the magnetic levitation compressor is based on the principle of magnetic force that "like repels like and opposites attract". A corresponding electromagnetic field is added between the rotor and stator of the bearing, and the electromagnetic field is controlled to make the rotor in a relatively "suspended" state, so that no mechanical contact and mechanical friction will be generated during rotation. Therefore, in the air-conditioning system, the magnetic levitation compressor has shown significant advantages due to its unique working principle. Since there is no direct mechanical contact between the rotor and the stator, it not only reduces the loss of energy during the conversion process, but also makes the compressor run quieter.

[0003] In the related art, when the shaft is in an ultra-high-speed rotating state, the method of using a distance measuring probe to detect its rotation speed has significant limitations. Due to the extremely high rotation speed, the dynamic characteristics of the shaft surface become complex, which will affect the measurement accuracy of the distance measuring probe. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a magnetic bearing assembly. According to the magnetic bearing assembly of the present invention, by constructing the first detection member into a plurality of periodically arranged in the circumferential direction, each second detection member will periodically generate a signal, and the period duration of the signal is determined by the time difference between adjacent signals, thereby improving the accuracy of detecting the rotation speed of the rotating shaft.

[0005] The present invention also proposes a detection method for the magnetic bearing assembly.

[0006] The present invention also proposes a control device for implementing the detection method of the magnetic bearing assembly.

[0007] The present invention also proposes a readable storage medium for implementing the steps of the above-mentioned detection method of the magnetic bearing assembly.

[0008] The present invention also proposes a magnetic bearing assembly having the above control device and / or the above readable storage medium.

[0009] The present invention also provides a compressor having the magnetic bearing assembly.

[0010] The invention also provides an air conditioner having the compressor.

[0011] According to the present invention, the magnetic bearing assembly includes: a rotating shaft, a first circumferential wall is formed on the circumferential side of the rotating shaft; a target plate, a second circumferential wall opposite to the first circumferential wall is arranged on the target plate; a first detection member, the first detection member is arranged on one of the first circumferential wall and the second circumferential wall, the first detection member is constructed as a detection groove or a detection protrusion extending in the radial direction and is constructed as a plurality of detection members periodically arranged in the circumferential direction; a second detection member, the second detection member is arranged on the other of the first circumferential wall and the second circumferential wall, the second detection member is constructed as a plurality of detection members and each of the second detection members generates a corresponding signal when passing through the first detection member, and the rotation speed of the rotating shaft is obtained according to the period length of the signal.

[0012] According to the magnetic bearing assembly of the present invention, the first detection member is configured as a plurality of periodically arranged members in the circumferential direction, so the first detection member is distributed on the circumference of the rotating shaft or the target disk at uniform intervals. When the rotating shaft rotates relative to the target disk, the first detection member interacts with the second detection member. The second detection member is configured as a plurality of members, but unlike the first detection member, the second detection member is not necessarily uniformly distributed. Each second detection member generates a corresponding signal when passing through the first detection member. When the rotating shaft rotates one circle, multiple first detection members will successively pass through the same second detection member. By recording the time point when each second detection member generates a signal, and determining the cycle duration of the signal by the time difference between adjacent signals. The cycle duration is directly related to the rotation speed of the rotating shaft, because the faster the rotation speed, the higher the frequency of the second detection member passing through the first detection member and generating a signal, and the shorter the corresponding cycle duration. Therefore, the rotation speed of the rotating shaft can be obtained according to the cycle duration of the signal. When the rotating shaft rotates one circle, multiple cycle durations can be obtained through a second detection member, thereby improving the detection accuracy of the rotating shaft rotation speed. And by using different second detection members, the data of the rotation speed measurement can be further enriched and verified. By comparing and analyzing the signal characteristics from different second detection members, the motion state of the rotating shaft can be more comprehensively understood.

[0013] According to some embodiments of the present invention, the second detection component includes: a positive probe and a negative probe, and the positive probe and the negative probe are arranged alternately; wherein the angle between the positive probe and the negative probe is α, and the angle between two adjacent first detection components is β and satisfies: α<β and βmodα=c, c>0.

[0014] According to some embodiments of the present invention, the angle between the positive probe and the negative probe is α and satisfies: 30°≤α≤150°.

[0015] According to some embodiments of the present invention, the angle between two adjacent first detection members is β and satisfies: 30°<β≤180°.

[0016] According to some embodiments of the present invention, the outer peripheral wall of the target plate is configured as a second peripheral wall, and a plurality of periodically arranged detection grooves are formed on the second peripheral wall; the rotating shaft is disposed on the outer periphery of the target plate and a plurality of second detection members are disposed on the inner wall of the rotating shaft.

[0017] In summary, according to the magnetic bearing assembly of the embodiment of the present invention, by constructing the first detection member into a plurality of periodically arranged in the circumferential direction, each second detection member generates a corresponding signal when passing through the first detection member. When the shaft rotates one circle, multiple first detection members will successively pass through the same second detection member. By recording the time point when each second detection member generates a signal, and determining the cycle duration of the signal by the time difference between adjacent signals. The cycle duration is directly related to the rotation speed of the shaft, because the faster the rotation speed, the higher the frequency of the second detection member passing through the first detection member and generating a signal, and the shorter the corresponding cycle duration. Therefore, the rotation speed of the shaft can be obtained according to the cycle duration of the signal. When the shaft rotates one circle, multiple cycle durations can be obtained through a second detection member, thereby improving the detection accuracy of the shaft rotation speed. The second detection member includes a positive probe and a negative probe. When the shaft rotates, positive signals and negative signals appear alternately, and the change law of the positive signal and the negative signal helps to determine the rotation direction of the shaft. βmodα=c, c>0. The remainder of β divided by α is c. Since c>0, β is not an integer multiple of α. If the time difference between the time points at which the positive signal and the negative signal appear in one cycle is a, and the time interval between the starting point of the next cycle signal and the end point of the current cycle signal is b, since β is not an integer multiple of α, there is a difference between a and b in the process of periodic signal generation, which makes it easy to distinguish the order and time points of the first detection component passing through the positive probe and the negative probe in different cycles, thereby determining the rotation direction of the shaft.

[0018] The following describes a detection method for the above-mentioned magnetic bearing assembly according to the present invention.

[0019] The detection method of the magnetic bearing assembly according to the present invention comprises acquiring the signal detected by the second detection member and obtaining the rotation speed of the rotating shaft according to the cycle length of the signal.

[0020] According to some embodiments of the present invention, the second detection component includes a positive probe and a negative probe, the positive probe generates a positive signal, and the negative probe generates a negative signal; the detection method also includes: judging the rotation direction of the shaft based on the periodic difference between the positive signal and the negative signal.

[0021] The following describes a control device for implementing the above-mentioned detection method of the magnetic bearing assembly according to the present invention.

[0022] The control device of the magnetic bearing assembly according to the present invention comprises: a memory having a program or instruction stored thereon; and a processor configured to implement the steps of the control method of the magnetic bearing assembly described in any one of the above embodiments when executing the program or the instruction. Since the processor is configured to implement the steps of the control method of the magnetic bearing assembly described in any one of the above embodiments when executing the program or the instruction, the control device of the magnetic bearing assembly according to the present invention can implement the detection method of the magnetic bearing assembly by executing the program or the instruction stored in the memory, thereby realizing accurate detection of the magnetic bearing assembly.

[0023] The following describes a readable storage medium for implementing the steps of the detection method of the magnetic bearing assembly according to the present invention.

[0024] According to the present invention, a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, the steps of the detection method of the magnetic bearing assembly described in any one of the above embodiments are implemented. Since the steps of the detection method of the magnetic bearing assembly described in any one of the above embodiments are implemented when the program or instruction is executed by the processor, the program or instruction for implementing the detection method of the magnetic bearing assembly is stored on the readable storage medium according to the present invention, thereby supporting the processor to execute the detection method of the magnetic bearing assembly and realize accurate detection of the magnetic bearing assembly.

[0025] The magnetic bearing assembly according to the present invention having the above control device and / or the above readable storage medium is described below.

[0026] The magnetic bearing assembly according to some embodiments of the present invention includes the control device of the magnetic bearing assembly mentioned above. Since the magnetic bearing assembly according to the present invention includes the control device of the magnetic bearing assembly mentioned above, the magnetic bearing assembly according to the embodiment of the present invention can execute the detection program or instructions stored in the memory in real time through the control device, complete the detection autonomously, and improve the stability and reliability of the system.

[0027] According to some embodiments of the present invention, the magnetic bearing assembly includes the above-mentioned readable storage medium. Since the magnetic bearing assembly according to the present invention includes the above-mentioned readable storage medium, the setting of the readable storage medium makes the update and upgrade of the detection method simple and fast, and enhances the adaptability and flexibility of the magnetic bearing assembly.

[0028] A compressor having the above-mentioned magnetic bearing assembly according to the present invention will be described below.

[0029] The compressor according to the present invention comprises the magnetic bearing assembly described in any one of the above embodiments. Since the compressor according to the present invention comprises the magnetic bearing assembly described in any one of the above embodiments, the compressor according to the present invention can achieve accurate measurement of the rotation speed of the rotating shaft.

[0030] An air conditioner having the above-mentioned compressor according to the present invention will be described below.

[0031] The air conditioner according to the present invention includes the above compressor. Since the air conditioner according to the present invention includes the above compressor, the air conditioner according to the present invention can achieve accurate control of the rotation speed of the compressor shaft, thereby optimizing the operating efficiency of the air conditioner and reducing energy consumption.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is a schematic plan view of a magnetic bearing assembly according to one embodiment of the present invention;

[0035] Figure 2 yes Figure 1 The signal diagram when the magnetic bearing assembly shown rotates clockwise;

[0036] Figure 3 yes Figure 1 The signal diagram when the magnetic bearing assembly shown rotates counterclockwise;

[0037] Figure 4 is a flow chart of a detection method for a magnetic bearing assembly according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 1. Magnetic bearing assembly;

[0040] 11. rotating shaft, 111. first peripheral wall, 112. second detection member, 1121. positive electrode probe, 1122. negative electrode probe;

[0041] 12. target plate, 121. second peripheral wall, 122. first detection member. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the related art, when the shaft is in an ultra-high-speed rotating state, the method of using a distance measuring probe to detect its rotation speed has significant limitations. Due to the extremely high rotation speed, the dynamic characteristics of the shaft surface become complex, which will affect the measurement accuracy of the distance measuring probe.

[0044] Reference below Figure 1-Figure 3 A magnetic bearing assembly 1 according to an embodiment of the present invention is described.

[0045] like Figure 1 As shown, the magnetic bearing assembly 1 according to the present invention comprises a rotating shaft 11, which is responsible for rotation. A first peripheral wall 111 is formed on the peripheral side of the rotating shaft 11, and the first peripheral wall 111 is used to form a certain gap with a second peripheral wall 121 on the target plate 12 to allow non-contact rotation.

[0046] The magnetic bearing assembly 1 further includes a target disk 12, which is stationary, so that the rotating shaft 11 rotates relative to the target disk 12. The target disk 12 is provided with a second peripheral wall 121 that is directly opposite to the first peripheral wall 111. During the rotation of the rotating shaft 11 relative to the target disk 12, a constant gap is maintained between the first peripheral wall 111 and the second peripheral wall 121, thereby achieving frictionless rotation and reducing energy loss.

[0047] The magnetic bearing assembly 1 also includes a first detection member 122, which is arranged on one of the first circumferential wall 111 and the second circumferential wall 121, so the first detection member 122 can be arranged on the rotating shaft 11 or on the target disk 12. The first detection member 122 is configured as a detection groove or a detection protrusion extending in the radial direction. The first detection member 122 can be a groove extending in the radial direction or a protrusion shape. The first detection member 122 is configured as a plurality of periodically arranged circumferentially, so the first detection member 122 is distributed on the circumference of the rotating shaft 11 or the target disk 12 at uniform intervals. When the rotating shaft 11 rotates relative to the target disk 12, the first detection member 122 interacts with the second detection member 112.

[0048] The magnetic bearing assembly 1 further includes a second detection member 112, which is disposed on the other of the first circumferential wall 111 and the second circumferential wall 121. Therefore, if the first detection member 122 is located on the rotating shaft 11, the second detection member 112 will be disposed on the target disk 12; conversely, if the first detection member 122 is on the target disk 12, the second detection member 112 will be located on the rotating shaft 11. During the rotation of the rotating shaft 11 relative to the target disk 12, the first detection member 122 interacts with the second detection member 112 to cause the second detection member 112 to generate a signal. The signal changes periodically with the rotation of the rotating shaft 11, reflecting the position, speed or other relevant motion parameters of the rotating shaft 11.

[0049] The second detection member 112 is constructed as a plurality of them, but unlike the first detection member 122, the second detection member 112 is not necessarily evenly distributed. Each second detection member 112 generates a corresponding signal when passing through the first detection member 122. When the shaft 11 rotates one circle, multiple first detection members 122 will successively pass through the same second detection member 112. By recording the time point when each second detection member 112 generates a signal, and determining the cycle duration of the signal by the time difference between adjacent signals. The cycle duration is directly related to the rotation speed of the shaft 11, because the faster the rotation speed, the higher the frequency of the second detection member 112 passing through the first detection member 122 and generating a signal, and the shorter the corresponding cycle duration. Therefore, the rotation speed of the shaft 11 can be obtained according to the cycle duration of the signal. When the shaft 11 rotates one circle, multiple cycle durations can be obtained through a second detection member 112, thereby improving the detection accuracy of the rotation speed of the shaft 11. And by using different second detection members 112, the data of the rotation speed measurement can be further enriched and verified. By comparing and analyzing the signal characteristics from different second detection members 112 , the motion state of the rotating shaft 11 can be more comprehensively understood.

[0050] Therefore, according to the magnetic bearing assembly 1 of the present invention, by constructing the first detection member 122 as a plurality of detection members arranged periodically in the circumferential direction, each second detection member 112 will periodically generate a signal, and the period duration of the signal is determined by the time difference between adjacent signals, thereby improving the accuracy of detecting the rotation speed of the rotating shaft 11.

[0051] According to some embodiments of the present invention, Figure 1-Figure 3 As shown, the second detection member 112 includes a positive probe 1121 and a negative probe 1122, and the positive probe 1121 and the negative probe 1122 are alternately arranged, so in the circumferential direction, a positive probe 1121 is followed by a negative probe 1122, and then another positive probe 1121, and so on, forming an alternating arrangement. However, if there is only one positive probe 1121 and one negative probe 1122, the positive probe 1121 and the negative probe 1122 are distributed in the circumferential direction to satisfy the alternating arrangement. The positive probe 1121 generates a positive signal when passing through the first detection member 122, and the negative probe 1122 generates a negative signal when passing through the first detection member 122. Therefore, when the shaft 11 rotates, the positive signal and the negative signal appear alternately, and the change law of the positive signal and the negative signal helps to determine the rotation direction of the shaft 11.

[0052] The angle between the positive probe 1121 and the negative probe 1122 is α, which reflects the closeness of the arrangement of the positive probe 1121 and the negative probe 1122 on the circumference. The angle between two adjacent first detection members 122 is β, which reflects the closeness of the arrangement of the first detection members 122 on the circumference. α<β, so the arrangement of the positive probe 1121 and the negative probe 1122 is closer than that of the first detection members 122.

[0053] When the shaft 11 rotates, one first detection member 122 first completely passes through the adjacent positive probe 1121 and negative probe 1122, while another first detection member 122 adjacent to the previous first detection member 122 has not completely passed through the adjacent positive probe 1121 and negative probe 1122. Therefore, when the direction of rotation of the shaft 11 is different, the order and time point of the first detection member 122 passing through the positive probe 1121 and negative probe 1122 will also be different.

[0054] βmodα=c, c>0. mod is a modular operation, which means that the remainder of β divided by α is equal to c. The remainder of β divided by α is c. Since c>0, β is not an integer multiple of α. If the time difference between the time points at which the positive signal and the negative signal appear in one cycle is a, and the time interval between the starting point of the next cycle signal and the end point of the current cycle signal is b, since β is not an integer multiple of α, there is a difference between a and b in the process of periodic signal generation, which facilitates the identification of the order and time points of the first detection member 122 passing through the positive probe 1121 and the negative probe 1122 in different cycles, thereby determining the rotation direction of the shaft 11.

[0055] The following is a specific description using an embodiment.

[0056] When the shaft 11 rotates in the clockwise direction, each first detection member 122 will first pass through a positive probe 1121, and then immediately pass through the adjacent negative probe 1122, generating a signal sequence of positive signals first and negative signals later. As the shaft 11 continues to rotate, the subsequent first detection members 122 will repeat this process in turn, thereby forming a continuous and regular alternating signal sequence of positive and negative signals, indicating that the direction of rotation of the shaft 11 is clockwise.

[0057] On the contrary, when the shaft 11 rotates counterclockwise, the order in which the first detection members 122 pass through the probes will change. At this time, each first detection member 122 will first encounter the negative probe 1122, generating a negative signal, and then encounter the positive probe 1121, generating a positive signal. Therefore, the signal sequence generated by the positive probe 1121 and the negative probe 1122 will become a negative signal first and then a positive signal, presenting a continuous but opposite direction alternating signal sequence of negative and positive signals, indicating that the direction of rotation of the shaft 11 is counterclockwise.

[0058] According to some embodiments of the present invention, the angle between the positive probe 1121 and the negative probe 1122 is α and satisfies: 30°≤α≤150°. 30°≤α≤150° limits the possible values ​​of α, thereby limiting the relative positional relationship between the positive probe 1121 and the negative probe 1122 on the circumference.

[0059] By limiting α to be greater than or equal to 30°, a sufficient distance is maintained between the positive probe 1121 and the negative probe 1122, and there is a certain time difference between the time points when the positive signal and the negative signal appear respectively, ensuring that the signals can be clearly distinguished and processed, which helps to improve the accuracy of determining the rotation direction of the shaft 11.

[0060] By limiting α to be less than or equal to 150°, not only the time difference between the time points at which the positive signal and the negative signal appear in one cycle is limited to a reasonable range, but also the time interval between the starting point of the next cycle signal and the end point of the current cycle signal is limited. The stable signal cycle and controllable time interval help to achieve more precise time resolution and improve the efficiency and accuracy of data acquisition.

[0061] According to some embodiments of the present invention, the angle between two adjacent first detection members 122 is β and satisfies: 30°<β≤180°. 30°<β≤180° limits the possible values ​​of β, thereby limiting the relative positional relationship between two adjacent first detection members 122 on the circumference.

[0062] By limiting β to be greater than 30°, β can be greater than α when α is equal to 30°, so that the order and time points of the first detection member 122 passing through the positive probe 1121 and the negative probe 1122 in different cycles can be identified, thereby determining the rotation direction of the shaft 11.

[0063] By limiting β≤180°, at least two first detection members 122 can be distributed in the circumferential direction, thereby improving the detection accuracy of the rotation speed of the rotating shaft 11 and being able to determine the rotation direction of the rotating shaft 11 .

[0064] According to some embodiments of the present invention, the outer peripheral wall of the target disk 12 is configured as a second peripheral wall 121, so the rotating shaft 11 rotates relative to the target disk 12 at the outer periphery of the target disk 12. A plurality of periodically arranged detection grooves are formed on the second peripheral wall 121, and the detection grooves are arranged according to a periodic rule, and are used to interact with the second detection member 112 on the rotating shaft 11, so that the second detection member 112 generates a signal.

[0065] The rotating shaft 11 is arranged on the outer periphery of the target plate 12, and maintains a certain gap with the second peripheral wall 121 of the target plate 12, allowing the rotating shaft 11 to rotate non-contact with respect to the target plate 12. A plurality of second detection members 112 are arranged on the inner wall of the rotating shaft 11. During the rotation of the rotating shaft 11, the second detection members 112 will generate a signal when passing through the detection groove on the target plate 12, so as to detect the rotation speed of the rotating shaft 11.

[0066] According to some embodiments of the present invention, the second detection member 112 is configured as a distance sensor. The distance sensor is used to measure the gap change between the rotating shaft 11 and the target plate 12. Due to the presence of the detection groove, during the rotation of the rotating shaft 11, the second detection member 112 will periodically pass through the detection groove, resulting in a change in the distance between the distance sensor and the target plate 12, and the distance change can be captured by the distance sensor and converted into an electrical signal.

[0067] Refer to the following Figure 4 The detection method for the above-mentioned magnetic bearing assembly 1 according to the present invention is described.

[0068] like Figure 4 As shown, the detection method of the magnetic bearing assembly 1 according to the present invention includes acquiring the signal detected by the second detection member 112 and obtaining the rotation speed of the shaft 11 according to the period length of the signal.

[0069] According to the detection method of the magnetic bearing assembly 1 of the present invention, by obtaining the signal detected by the second detection member 112, according to the periodic characteristics of the signal, the cycle duration of the signal can be determined by the time difference between adjacent signals. The cycle duration reflects the time required for two adjacent first detection members 122 to pass through the same second detection member 112. Since the first detection members 122 are periodically arranged on the rotating shaft 11 or the target plate 12, the cycle duration also indirectly reflects the time corresponding to the interval between two adjacent first detection members 122 in one rotation of the rotating shaft 11. After determining the cycle duration, the rotation speed of the rotating shaft 11 can be obtained by calculating the number of cycles that occur per unit time. The cycle duration is directly related to the rotation speed of the rotating shaft 11, because the faster the rotation speed, the higher the frequency of the second detection member 112 passing through the first detection member 122 and generating a signal, and the shorter the corresponding cycle duration. Therefore, the rotation speed of the rotating shaft 11 can be obtained according to the cycle duration of the signal. When the rotating shaft 11 rotates one circle, multiple cycle durations can be obtained through a second detection member 112, thereby improving the detection accuracy of the rotation speed of the rotating shaft 11.

[0070] According to some embodiments of the present invention, Figure 4 As shown, the second detection member 112 includes a positive probe 1121 and a negative probe 1122. The positive probe 1121 generates a positive signal, and the negative probe 1122 generates a negative signal. During the rotation of the shaft 11, the positive signal and the negative signal will appear alternately periodically. The arrangement of the positive probe 1121 and the negative probe 1122 is closer than that of the first detection member 122.

[0071] The detection method also includes: judging the rotation direction of the rotating shaft 11 according to the periodic difference between the positive signal and the negative signal. When the rotating shaft 11 rotates, a first detection member 122 first completely passes through the adjacent positive probe 1121 and the negative probe 1122, and at this time, another first detection member 122 adjacent to the previous first detection member 122 has not completely passed through the adjacent positive probe 1121 and the negative probe 1122. Therefore, when the direction of rotation of the rotating shaft 11 is different, the order and time point of the first detection member 122 passing through the positive probe 1121 and the negative probe 1122 will also be different. Therefore, the periodic difference between the positive signal and the negative signal can be used to determine the rotation direction of the rotating shaft 11.

[0072] The following is a specific description using an embodiment.

[0073] If each first detection member 122 first passes through a positive probe 1121 and then immediately passes through the adjacent negative probe 1122, a signal sequence of positive signals first and negative signals second is generated. As the shaft 11 continues to rotate, the subsequent first detection members 122 will repeat this process in turn, thereby forming a continuous and regular alternating signal sequence of positive and negative signals, indicating that the direction of rotation of the shaft 11 is clockwise.

[0074] On the contrary, if each first detection member 122 first encounters the negative probe 1122 and generates a negative signal, and then encounters the positive probe 1121 and generates a positive signal, the signal sequence generated by the positive probe 1121 and the negative probe 1122 will become a negative signal first and then a positive signal, presenting a continuous but opposite direction alternating signal sequence of negative and positive signals, indicating that the rotation direction of the shaft 11 is counterclockwise.

[0075] The following describes a control device for implementing the detection method of the magnetic bearing assembly 1 according to the present invention.

[0076] The control device of the magnetic bearing assembly 1 according to the present invention comprises a memory on which a program or instruction is stored. The program or instruction is used to implement the detection method of the magnetic bearing assembly 1 .

[0077] The control device also includes a processor, which is responsible for executing the program or instructions stored in the memory. When the processor executes the program or instruction, the processor will execute the detection method of the magnetic bearing assembly 1 according to the preset logic and steps. The processor is configured to implement the steps of the control method of the magnetic bearing assembly 1 of any one of the above-mentioned embodiments when executing the program or instruction. Since the processor is configured to implement the steps of the control method of the magnetic bearing assembly 1 of any one of the above-mentioned embodiments when executing the program or instruction, the control device of the magnetic bearing assembly 1 according to the present invention can implement the detection method of the magnetic bearing assembly 1 by executing the program or instruction stored in the memory, thereby realizing accurate detection of the magnetic bearing assembly 1.

[0078] The following describes a readable storage medium according to the present invention for implementing the steps of the detection method of the magnetic bearing assembly 1 described above.

[0079] According to the readable storage medium of the present invention, a program or instruction is stored, and when the program or instruction is executed by the processor, the steps of the detection method of the magnetic bearing assembly 1 of any one of the above-mentioned embodiments are implemented. Since the program or instruction implements the steps of the detection method of the magnetic bearing assembly 1 of any one of the above-mentioned embodiments when the program or instruction is executed by the processor, the program or instruction implementing the detection method of the magnetic bearing assembly 1 is stored on the readable storage medium of the present invention, thereby supporting the processor to execute the detection method of the magnetic bearing assembly 1 and realize accurate detection of the magnetic bearing assembly 1.

[0080] The magnetic bearing assembly 1 according to the present invention having the above control device and / or the above readable storage medium is described below.

[0081] According to some embodiments of the present invention, the magnetic bearing assembly 1 includes the above-mentioned control device of the magnetic bearing assembly 1. Since the magnetic bearing assembly 1 according to the present invention includes the above-mentioned control device of the magnetic bearing assembly 1, the magnetic bearing assembly 1 according to the embodiment of the present invention can execute the detection program or instructions stored in the memory in real time through the control device, complete the detection autonomously, and improve the stability and reliability of the system.

[0082] According to some embodiments of the present invention, the magnetic bearing assembly 1 includes the above-mentioned readable storage medium. Since the magnetic bearing assembly 1 according to the present invention includes the above-mentioned readable storage medium, the setting of the readable storage medium makes the updating and upgrading of the detection method simple and fast according to the magnetic bearing assembly 1 of the embodiment of the present invention, and enhances the adaptability and flexibility of the magnetic bearing assembly 1.

[0083] A compressor having the above-mentioned magnetic bearing assembly 1 according to the present invention will be described below.

[0084] The compressor according to the present invention comprises the magnetic bearing assembly 1 in any one of the above embodiments. Since the compressor according to the present invention comprises the magnetic bearing assembly 1 in any one of the above embodiments, the compressor according to the present invention can achieve accurate measurement of the rotation speed of the rotating shaft 11.

[0085] An air conditioner having the above-mentioned compressor according to the present invention will be described below.

[0086] The air conditioner according to the present invention includes the above compressor. Since the air conditioner according to the present invention includes the above compressor, the air conditioner according to the present invention can achieve accurate control of the rotation speed of the compressor shaft 11, thereby optimizing the operating efficiency of the air conditioner and reducing energy consumption.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A magnetic bearing assembly, characterized in that: include: A rotating shaft (11), wherein a first peripheral wall (111) is formed on a peripheral side of the rotating shaft (11); A target plate (12), wherein the target plate (12) is provided with a second peripheral wall (121) directly opposite to the first peripheral wall (111); A first detection member (122), the first detection member (122) being arranged on one of the first peripheral wall (111) and the second peripheral wall (121), the first detection member (122) being configured as a detection groove or a detection protrusion extending in a radial direction and being configured as a plurality of detection grooves or detection protrusions periodically arranged in a circumferential direction; A second detection member (112), wherein the second detection member (112) is arranged on the other of the first peripheral wall (111) and the second peripheral wall (121), the second detection member (112) is constructed in a plurality and each of the second detection members (112) generates a corresponding signal when passing through the first detection member (122), and the rotation speed of the rotating shaft (11) is obtained according to the period length of the signal.

2. The magnetic bearing assembly according to claim 1, characterized in that: The second detection member (112) comprises: A positive probe (1121) and a negative probe (1122), wherein the positive probe (1121) and the negative probe (1122) are arranged alternately; wherein The angle between the positive pole probe (1121) and the negative pole probe (1122) is α, and the angle between two adjacent first detection components (122) is β, and the following conditions are satisfied: α<β and βmodα=c, c>0.

3. The magnetic bearing assembly according to claim 2, characterized in that: The angle between the positive pole probe (1121) and the negative pole probe (1122) is α and satisfies: 30°≤α≤150°.

4. The magnetic bearing assembly according to claim 2, characterized in that: The included angle between two adjacent first detection members (122) is β and satisfies: 30°<β≤180°.

5. The magnetic bearing assembly according to claim 1, characterized in that: The outer peripheral wall of the target disk (12) is configured as a second peripheral wall (121), and a plurality of periodically arranged detection grooves are formed on the second peripheral wall (121); the rotating shaft (11) is arranged on the outer periphery of the target disk (12), and a plurality of second detection members (112) are arranged on the inner wall of the rotating shaft (11).

6. A method for detecting a magnetic bearing assembly according to any one of claims 1 to 5, characterized in that: include: The signal detected by the second detection element (112) is acquired and the rotation speed of the rotating shaft (11) is obtained according to the period length of the signal.

7. The detection method of the magnetic bearing assembly according to claim 6, characterized in that: The second detection element (112) comprises a positive probe (1121) and a negative probe (1122), the positive probe (1121) generates a positive signal, and the negative probe (1122) generates a negative signal; The detection method further comprises: judging the rotation direction of the rotating shaft (11) according to the period difference between the positive signal and the negative signal.

8. A control device for a magnetic bearing assembly, characterized in that: include: A memory on which programs or instructions are stored; A processor is configured to implement the steps of the method for controlling a magnetic bearing assembly as described in any one of claims 6 to 7 when executing the program or the instructions.

9. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or the instruction is executed by the processor, the steps of the method for detecting a magnetic bearing assembly as described in any one of claims 6 to 7 are implemented.

10. A magnetic bearing assembly, characterized in that: include: The control device of the magnetic bearing assembly according to claim 8; And / or the readable storage medium as described in claim 9.

11. A compressor, characterized in that: include: A magnetic bearing assembly as claimed in any one of claims 1 to 5 and 10.

12. An air conditioner, characterized in that: include: The compressor of claim 11.

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