Rotor assembly, motor and compressor

Abstract

The present invention provides a rotor assembly, a motor and a compressor. The rotor assembly includes a rotor core, a plurality of slots, a circuit board and conducting bars. Among them, the plurality of slots are arranged on the rotor core, and each slot in the plurality of slots penetrates axially along the rotor core; the circuit board is arranged at one end of the rotor core and rotates synchronously with the rotor core; both ends of the conducting bar are provided with connection terminals, and the conducting bar passes through the slot from the other end of the rotor core so that the connection terminals are connected to the circuit board. The present invention is applicable to various types of motors by connecting the connection terminals of the conducting bar to the circuit board, with a simple structure, a simple and convenient production process, being conducive to large-scale mass production, effectively reducing the usage amount of conductive materials and reducing the resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly, to a rotor assembly, a motor, and a compressor. Background Art

[0002] A motor is an essential electromechanical energy conversion device in daily life, industrial, and agricultural production processes. Among them, motors include different types, and windings need to be provided on the rotors of some motors, such as wound-rotor asynchronous motors, synchronous motors, DC motors, traditional doubly-fed motors, etc. However, the technology of setting windings in the rotor has problems such as many processes, low efficiency, too long ends of the windings, and large resistance of the windings. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention is to provide a rotor assembly.

[0005] A second aspect of the present invention is to provide a motor.

[0006] A third aspect of the present invention is to provide a compressor.

[0007] In view of this, according to the first aspect of the present invention, there is provided a rotor assembly for a motor, the rotor assembly including a rotor core, a plurality of slots, a circuit board, and conducting bars. Among them, the plurality of slots are provided on the rotor core, and each of the plurality of slots penetrates axially along the rotor core; the circuit board is provided at one end of the rotor core and rotates synchronously with the rotor core; both ends of the conducting bar are provided with connection terminals, and the conducting bar passes through the slot from the other end of the rotor core so that the two connection terminals are connected to the circuit board.

[0008] The rotor assembly provided by the present invention includes a rotor core, a plurality of slots, a circuit board, and conducting bars. Among them, the plurality of slots are provided on the rotor core, and each of the plurality of slots penetrates axially along the rotor core. Among them, the rotor core is formed by laminating a plurality of rotor punching sheets. Preferably, the rotor punching sheets are silicon steel sheets. The circuit board is arranged at one end of the rotor core and rotates synchronously with the rotor core. Two wiring terminals are provided at both ends of the conducting bar. Among them, the conducting bar can be pre-obtained by processing a material with conductive function through a mold. Preferably, the conducting bar is made of flat copper wire. The conducting bar can pass through the slots from the other end of the rotor core to connect the two wiring terminals to the circuit board. Among them, the two wiring terminals on the conducting bar can be connected to the circuit board according to design requirements, so as to realize the connection requirements of different types of motors. Among them, the connection method between the wiring terminal of the conducting bar and the circuit board includes mechanical connection and electrical connection. The present invention makes the rotor assembly applicable to various types of motors by setting the connection between the wiring terminal of the conducting bar and the circuit board, with simple structure, simple and convenient production process, and conducive to large-scale mass production, effectively reducing the usage amount of conductive materials and reducing resistance. Among them, the motor can be an asynchronous motor, a synchronous motor, a DC motor, a doubly-fed motor, etc.

[0009] In addition, for the rotor assembly according to the above technical solution provided by the present invention, it may further have the following additional technical features:

[0010] In the above technical solution, preferably, the rotor assembly further includes a first shaft hole, a second shaft hole, and a rotating shaft. The first shaft hole is arranged at the center of the rotor core; the second shaft hole is arranged at the center of the circuit board; the rotating shaft passes through the first shaft hole and the second shaft hole to be fixedly connected to the rotor core and the circuit board.

[0011] In this technical solution, the rotor assembly further includes a first shaft hole, a second shaft hole, and a rotating shaft. Among them, the first shaft hole is arranged on the rotor core. Preferably, the first shaft hole is arranged at the central position of the rotor core. The second shaft hole is arranged on the circuit board. Preferably, the second shaft hole is arranged at the central position of the circuit board corresponding to the first shaft hole. The rotating shaft passes through the first shaft hole to be fixedly connected to the rotor core, and the rotating shaft passes through the second shaft hole to be fixedly connected to the circuit board. During the rotation of the rotor core, the rotating shaft is driven to rotate, so that the circuit board connected to the rotating shaft rotates synchronously with the rotor core and the rotating shaft.

[0012] In any of the above technical solutions, preferably, the wiring terminal protrudes from the end face of the rotor core close to the circuit board.

[0013] In this technical solution, by making the two wiring terminals on the conducting bar protrude from the end face of the rotor core close to the circuit board, it is convenient to connect the wiring terminal to the circuit board and reduces the processing difficulty.

[0014] Preferably, the conducting bar is U-shaped and has two wiring terminals located at the ends of the conducting bar. When the conducting bar passes through the slot and protrudes from the end face of the rotor core close to the circuit board, both wiring terminals protrude from the end face of the rotor core and are close to the circuit board.

[0015] In any of the above technical solutions, preferably, the rotor assembly further includes an insulating layer provided on the outer peripheral wall of the conducting bar.

[0016] In this technical solution, the rotor assembly further includes an insulating layer provided on the outer peripheral wall of the conducting bar, thereby preventing a short circuit between the conducting bar and the rotor core, or when there are multiple conducting bars in one slot, avoiding a short circuit between the conducting bars, and thus ensuring the safety performance of the motor during use. Preferably, the insulating layer is a polyester film.

[0017] In any of the above technical solutions, preferably, the slot includes a first slot area and a second slot area that are connected, the first slot area is located between the first shaft hole and the second slot area, and multiple slots include adjacent first slots and second slots; one end of the conducting bar passes through the first slot area of the first slot to be connected to the circuit board, and the other end of the conducting bar passes through the second slot area of the second slot to be connected to the circuit board.

[0018] In this technical solution, the slot includes a first slot area and a second slot area that are connected, where the first slot area is located between the first shaft hole and the second slot area, that is, the first slot area is close to the first shaft hole. Multiple slots include adjacent first slots and second slots. One end of the conducting bar passes through the first slot area of the first slot to connect the wiring terminal at its end to the corresponding interface on the circuit board, and the other end of the conducting bar passes through the second slot area of the second slot to be connected to the corresponding interface on the circuit board. That is to say, one end of each of the multiple conducting bars is located in the first slot area close to the first shaft hole of the first slot, and the other end is located in the second slot area far from the first shaft hole of the second slot adjacent to the first slot. This can make the way of inserting multiple conducting bars into the slots more reasonable and can also limit each other between the multiple conducting bars to prevent the conducting bars from coming out of the slots.

[0019] In any of the above technical solutions, preferably, the rotor assembly further includes: a plurality of first electrical interfaces, the plurality of first electrical interfaces are electrically connected to each other and provided on the circuit board, and each of the plurality of first electrical interfaces is electrically connected to its corresponding wiring terminal.

[0020] In this technical solution, the rotor assembly further includes a plurality of first electrical interfaces, which are electrically connected to each other and arranged at one end of the circuit board facing the rotor core. When the terminal blocks on the plurality of bars extend out of the slots, each of the plurality of terminal blocks is electrically connected to its corresponding first electrical interface. The electrical connection relationship between the terminal blocks on the bars and the first electrical interfaces on the circuit board can be set according to the requirements of different types of motors. Preferably, when the motor is an asynchronous motor, the two terminal blocks of each bar (the two terminal blocks include the negative terminal "N" and the positive terminal "P") are short-circuited through the plurality of first electrical interfaces.

[0021] In any of the above technical solutions, preferably, the rotor assembly further includes: a second electrical interface arranged on the circuit board, one end of the second electrical interface is electrically connected to the corresponding terminal block, and the other end of the second electrical interface is connected to the power supply.

[0022] In this technical solution, the rotor assembly further includes a second electrical interface, and the second electrical interface is arranged on the circuit board. One end of the second electrical interface is electrically connected to the terminal block, and the other end of the second electrical interface is electrically connected to the power supply. When the motor is a synchronous motor or a DC motor, the N terminals and P terminals of the plurality of bars are connected end to end in sequence and then connected to the second electrical interface, so that the terminal blocks of the bars are connected to the power supply through the second electrical interface. The external DC power supply supplies power to the bars through the second electrical interface on the circuit board, so that there is a magnetic potential generated by the bars on the rotor core. When the rotor rotates, the direction of the input power on the circuit board remains unchanged, and the direction of the magnetic potential of the rotor core remains unchanged.

[0023] In any of the above technical solutions, preferably, the rotor assembly further includes: a controller arranged on the circuit board, one end of the controller is electrically connected to the first electrical interface, and the other end of the controller is connected to the second electrical interface. The controller is used to control the magnitude and / or direction of the current flowing through the bars.

[0024] In this technical solution, the rotor assembly further includes a controller, the controller is arranged on the circuit board, and one end of the controller is electrically connected to the first electrical interface, and the other end of the controller is connected to the second electrical interface. By setting the controller, the magnitude and direction of the current in the bars are adjusted. The rotor assembly further includes a power switch, the power switch is arranged on the circuit board and is connected in series with the controller. The rotor assembly further includes a relay, the relay is arranged on the circuit board and is connected in series with the controller.

[0025] According to the second aspect of the present invention, there is provided a motor, which includes: a rotor assembly as provided in any one of the above technical solutions.

[0026] The motor provided by the present invention includes the rotor assembly described in any of the above technical solutions, and thus has all the beneficial effects of this rotor assembly, which will not be elaborated herein.

[0027] According to the third aspect of the present invention, there is provided a compressor, which includes: the rotor assembly or the motor provided in any of the above technical solutions.

[0028] The compressor provided by the present invention includes the rotor assembly or the motor described in any of the above technical solutions, and thus has all the beneficial effects of this rotor assembly or this motor, which will not be elaborated herein.

[0029] The additional aspects and advantages of the present invention will become apparent in the following description part, or be learned through the practice of the present invention. Brief Description of the Drawings

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0031] Figure 1 Shows an exploded view of the structure of the rotor assembly in an embodiment according to the present invention;

[0032] Figure 2 Shows a partial structural schematic diagram of the rotor assembly in an embodiment according to the present invention;

[0033] Figure 3 Shows a circuit schematic diagram of multiple bars of the rotor assembly in an embodiment according to the present invention;

[0034] Figure 4 Shows a circuit schematic diagram of multiple bars of the rotor assembly in another embodiment according to the present invention.

[0035] Wherein, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0036] 1 Rotor core, 12 First shaft hole, 2 Slot, 22 First slot area, 24 Second slot area, 26 First slot, 28 Second slot, 3 Circuit board, 32 Second shaft hole, 4 Bar, 42 Wiring terminal, 5 Rotating shaft, 6 Rotor assembly. Detailed Description of the Embodiments

[0037] In order to be able to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0038] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0039] Reference will be made hereinafter Figures 1 to 4 to describe a rotor assembly, a motor, and a compressor according to some embodiments of the present invention.

[0040] According to a first aspect of the present invention, there is provided a rotor assembly 6 for a motor. The rotor assembly 6 includes a rotor core 1, a plurality of slots 2, a circuit board 3, and bars 4. Among them, the plurality of slots 2 are provided on the rotor core 1, and each of the plurality of slots 2 penetrates axially along the rotor core 1; the circuit board 3 is provided at one end of the rotor core 1 and rotates synchronously with the rotor core 1; both ends of the bar 4 are provided with terminal blocks 42, and the bar 4 passes through the slot 2 from the other end of the rotor core 1 so that the two terminal blocks 42 are connected to the circuit board 3.

[0041] As Figure 1 shown, the rotor assembly 6 provided by the present invention includes a rotor core 1, a plurality of slots 2, a circuit board 3, and bars 4. Among them, the plurality of slots 2 are provided on the rotor core 1, and each of the plurality of slots 2 penetrates axially along the rotor core 1. Among them, the rotor core 1 is formed by laminating a plurality of rotor punching sheets. Preferably, the rotor punching sheet is a silicon steel sheet. The circuit board 3 is provided at one end of the rotor core 1 and rotates synchronously with the rotor core 1. Both ends of the bar 4 are provided with terminal blocks 42. Among them, the bar 4 can be pre-obtained by processing a material with conductive function through a mold. Preferably, the bar 4 is made of flat copper wire. The bar 4 can pass through the slot 2 from the other end of the rotor core 1 so that the two terminal blocks 42 are connected to the circuit board 3. Among them, the two terminal blocks 42 on the bar 4 can be connected to the circuit board 3 according to design requirements, thereby realizing the connection requirements of different types of motors. Among them, the connection manner between the terminal block 42 of the bar 4 and the circuit board 3 includes mechanical connection and electrical connection. The present invention makes the rotor assembly 6 applicable to various types of motors by setting the connection between the terminal block 42 of the bar 4 and the circuit board 3, with simple structure, simple and convenient production process, and conducive to large-scale mass production, effectively reducing the usage amount of conductive materials and reducing resistance. Among them, the motor can be an asynchronous motor, a synchronous motor, a DC motor, a doubly-fed motor, etc.

[0042] In an embodiment of the present invention, preferably, the rotor assembly 6 further includes a first shaft hole 12, a second shaft hole 32, and a rotating shaft 5. The first shaft hole 12 is provided at the center of the rotor core 1; the second shaft hole 32 is provided at the center of the circuit board 3; the rotating shaft 5 passes through the first shaft hole 12 and the second shaft hole 32 to be fixedly connected to the rotor core 1 and the circuit board 3.

[0043] AsFigure 1 As shown, in this embodiment, the rotor assembly 6 further includes a first shaft hole 12, a second shaft hole 32 and a rotating shaft 5. The first shaft hole 12 is provided on the rotor core 1. Preferably, the first shaft hole 12 is provided at the central position of the rotor core 1. The second shaft hole 32 is provided on the circuit board 3. Preferably, the second shaft hole 32 is provided at the central position of the circuit board 3 corresponding to the first shaft hole 12. The rotating shaft 5 passes through the first shaft hole 12 and is fixedly connected to the rotor core 1, and the rotating shaft 5 passes through the second shaft hole 32 and is fixedly connected to the circuit board 3. During the rotation of the rotor core 1, the rotating shaft 5 is driven to rotate, so that the circuit board 3 connected to the rotating shaft 5 rotates synchronously with the rotor core 1 and the rotating shaft 5.

[0044] In an embodiment of the present invention, preferably, the terminal 42 protrudes from the end face of the rotor core 1 close to the circuit board 3.

[0045] In this embodiment, by making the two terminals 42 on the bar 4 protrude from the end face of the rotor core 1 close to the circuit board 3, it is convenient for the terminal 42 to be connected to the circuit board 3, reducing the processing difficulty.

[0046] Preferably, the bar 4 is U-shaped. The bar 4 has two terminals 42, and the two terminals 42 are located at the ends of the bar 4. When the bar 4 passes through the slot 2 and protrudes from the end face of the rotor core 1 close to the circuit board 3, both of the two terminals 42 protrude from the end face of the rotor core 1 and are close to the circuit board 3.

[0047] In an embodiment of the present invention, preferably, the rotor assembly 6 further includes an insulating layer provided on the outer peripheral wall of the bar 4.

[0048] In this embodiment, the rotor assembly 6 further includes an insulating layer provided on the outer peripheral wall of the bar 4, thereby preventing a short circuit between the bar 4 and the rotor core 1, or when there are multiple bars 4 in one slot 2, avoiding a short circuit between the bars 4, thus ensuring the safety performance of the motor during use. Preferably, the insulating layer is a polyester film.

[0049] In an embodiment of the present invention, preferably, the slot 2 includes a first slot area 22 and a second slot area 24 that are connected. The first slot area 22 is located between the first shaft hole 12 and the second slot area 24. Multiple slots 2 include adjacent first slots 26 and second slots 28. One end of the bar 4 passes through the first slot area 22 of the first slot 26 to be connected to the circuit board 3, and the other end of the bar 4 passes through the second slot area 24 of the second slot 28 to be connected to the circuit board 3.

[0050] As Figure 2As shown, in this embodiment, the slot 2 includes a first slot area 22 and a second slot area 24 that are connected and communicate with each other. Among them, the first slot area 22 is located between the first shaft hole 12 and the second slot area 24, that is, the first slot area 22 is close to the first shaft hole 12. The plurality of slots 2 include adjacent first slots 26 and second slots 28. One end of the guide bar 4 passes through the first slot area 22 of the first slot 26 to connect the wiring terminal 42 at its end to the corresponding interface on the circuit board 3, and the other end of the guide bar 4 passes through the second slot area 24 of the second slot 28 to connect to the corresponding interface on the circuit board 3. That is to say, one end of each of the plurality of guide bars 4 is located in the first slot area 22 close to the first shaft hole 12 in the first slot 26, and the other end is located in the second slot area 24 far from the first shaft hole 12 in the second slot 28 adjacent to the first slot 26. This can make the way of inserting the plurality of guide bars 4 into the slot 2 more reasonable, and can also mutually limit the plurality of guide bars 4 to prevent the guide bars 4 from coming out of the slot 2.

[0051] Specifically, the rotor assembly 6 includes 8 mutually independent guide bars 4. The guide bars 4 are U-shaped, and each guide bar 4 has 2 wiring terminals 42. The wiring terminals 42 of the 8 guide bars 4 can be represented as 1N, 1P, 2N, 2P..., 8N, 8P. Among them, the direction of current flowing from the N terminal of the guide bar 4 to the P terminal is the positive direction.

[0052] In an embodiment of the present invention, preferably, the rotor assembly 6 further includes: a plurality of first electrical interfaces, which are electrically connected to each other and arranged on the circuit board 3, and each of the plurality of first electrical interfaces is electrically connected to its corresponding wiring terminal 42.

[0053] In this embodiment, the rotor assembly 6 further includes a plurality of first electrical interfaces, which are electrically connected to each other and arranged at one end of the circuit board 3 facing the rotor core 1. When the wiring terminals 42 on the plurality of guide bars 4 extend out of the slot 2, each of the plurality of wiring terminals 42 is electrically connected to its corresponding first electrical interface. Among them, the electrical connection relationship between the wiring terminal 42 on the guide bar 4 and the first electrical interface on the circuit board 3 can be set according to the requirements of different types of motors. Preferably, when the motor is an asynchronous motor, as Figure 3 shown, then the two wiring terminals 42 of each guide bar 4 (the two wiring terminals 42 include the negative terminal "N" and the positive terminal "P") are both short-circuited through a plurality of first electrical interfaces.

[0054] In an embodiment of the present invention, preferably, the rotor assembly 6 further includes: a second electrical interface, which is arranged on the circuit board 3. One end of the second electrical interface is electrically connected to the corresponding wiring terminal 42, and the other end of the second electrical interface is connected to the power supply.

[0055] In this embodiment, the rotor assembly 6 further includes a second electrical interface, and the second electrical interface is disposed on the circuit board 3. One end of the second electrical interface is electrically connected to the terminal block 42, and the other end of the second electrical interface is electrically connected to a power source. When the motor is a synchronous motor or a DC motor, as Figure 4 shown, the N terminals and P terminals of the plurality of bars 4 are connected end to end in sequence and then connected to the second electrical interface, so that the terminal block 42 of the bar 4 is connected to the power source through the second electrical interface. The external DC power source supplies power to the bar 4 through the second electrical interface on the circuit board 3, so that a magnetic potential generated by the bar 4 exists on the rotor core 1. When the rotor rotates, the direction of the input power on the circuit board 3 remains unchanged, and the direction of the magnetic potential of the rotor core 1 remains unchanged.

[0056] In an embodiment of the present invention, preferably, the rotor assembly 6 further includes: a controller disposed on the circuit board 3, one end of the controller is electrically connected to the first electrical interface, and the other end of the controller is connected to the second electrical interface, and the controller is used to control the magnitude and / or direction of the current flowing through the bar 4.

[0057] In this embodiment, the rotor assembly 6 further includes a controller, the controller is disposed on the circuit board 3, and one end of the controller is electrically connected to the first electrical interface, and the other end of the controller is connected to the second electrical interface. By providing a controller to adjust the magnitude and direction of the current flowing through the bar 4. The rotor assembly 6 further includes a power switch, the power switch is disposed on the circuit board 3 and is connected in series with the controller. The rotor assembly 6 further includes a relay, the relay is disposed on the circuit board 3 and is connected in series with the controller.

[0058] According to a second aspect of the present invention, there is provided a motor, which includes: the rotor assembly 6 provided in any one of the above embodiments.

[0059] The motor provided by the present invention includes the rotor assembly 6 described in any one of the above embodiments, and thus has all the beneficial effects of the rotor assembly 6, which will not be described herein again.

[0060] According to a third aspect of the present invention, there is provided a compressor, which includes: the rotor assembly 6 or the motor provided in any one of the above embodiments.

[0061] The compressor provided by the present invention includes the rotor assembly 6 or the motor described in any one of the above embodiments, and thus has all the beneficial effects of the rotor assembly 6 or the motor, which will not be described herein again.

[0062] In the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotor assembly for a motor, characterized in that: The motor includes an asynchronous motor and a synchronous motor, and the rotor assembly includes: rotor core; A plurality of slots are provided on the rotor core, each of the plurality of slots passing through the rotor core in an axial direction; A circuit board is provided at one end of the rotor core and rotates synchronously with the rotor core; Conductor bars, each end of which is provided with a terminal block, and the conductor bar passes through the slot from the other end of the rotor core so as to connect the terminal block to the circuit board; a plurality of first electrical interfaces, the plurality of first electrical interfaces being arranged on the circuit board and electrically connected to each other, each of the plurality of first electrical interfaces being electrically connected to the corresponding wiring terminal; a second electrical interface, provided on the circuit board, wherein one end of the second electrical interface is electrically connected to the corresponding wiring terminal, and the other end of the second electrical interface is connected to a power supply; Among them, when the motor is an asynchronous motor, the two wiring terminals of each conductor bar are circuit-connected through multiple first electrical interfaces; when the motor is a synchronous motor, the two wiring terminals of multiple conductor bars are connected end to end and then connected to the second electrical interface.

2. The rotor assembly according to claim 1, wherein: The rotor assembly further comprises: A first shaft hole is provided at the center of the rotor core; a second axial hole, arranged at the center of the circuit board; A rotating shaft passes through the first shaft hole and the second shaft hole to be fixedly connected to the rotor core and the circuit board.

3. The rotor assembly according to claim 1, wherein: The connection terminal protrudes from the end surface of the rotor core close to the circuit board.

4. The rotor assembly according to claim 1, wherein: The rotor assembly further comprises: The insulating layer is arranged on the outer peripheral wall of the conductive bar.

5. The rotor assembly according to claim 2, wherein: The slot includes a first slot area and a second slot area that are connected to each other, the first slot area is located between the first shaft hole and the second slot area, and the plurality of slots include adjacent first slots and second slots; One end of the guide bar passes through the first slot area of the first slot to be connected to the circuit board, and the other end of the guide bar passes through the second slot area of the second slot to be connected to the circuit board.

6. The rotor assembly according to any one of claims 1 to 5, characterized in that: The rotor assembly further comprises: A controller is provided on the circuit board, one end of the controller is electrically connected to the first electrical interface, and the other end of the controller is connected to the second electrical interface, for controlling the magnitude and / or direction of the current flowing through the conductive bar.

7. A motor, characterized in that: include: A rotor assembly as claimed in any one of claims 1 to 6.

8. A compressor, characterized in that: include: The rotor assembly according to any one of claims 1 to 6; Or the motor as claimed in claim 7.

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