Magnetic bearing stator, radial magnetic bearing and motor

Abstract

The present application provides a magnetic bearing stator, a radial magnetic bearing and a motor. The magnetic bearing stator comprises a stator core (1), a coil winding (2), a coil frame (3) and an integrated circuit board, wherein the coil frame (3) is mounted on the stator core (1), the coil winding (2) is wound on the coil frame (3), the integrated circuit board is mounted on the coil frame (3), and a controller element (4) and a power amplifier element (5) are integrated on the integrated circuit board. The magnetic bearing stator according to the present application can reduce the number of final assembly parts, improve the integration of the magnetic bearing, and simplify the assembly process.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning equipment, and in particular to a magnetic bearing stator, a radial magnetic bearing and a motor. Background Art

[0002] Magnetic bearings have the characteristics of no mechanical contact, no need for lubrication, high critical speed, long service life and high reliability, and are widely used in high-speed and ultra-high-speed fields. However, the magnetic bearing body cannot work alone. It needs to work with controllers, sensors, power amplifiers and other electrical components to form a system to function properly.

[0003] Generally, the existing radial magnetic bearing system adopts a layout in which the actuator, controller, power amplifier and displacement sensor are separated, and the components are connected by wires.

[0004] After power is turned on, the displacement sensor monitors the position of the spindle, transmits the signal back to the controller, compares it with the preset reference value, and outputs an electrical signal to the power amplifier to change the electromagnetic force of the bearing actuator. After the electrical signal is amplified to the required value, it drives the bearing actuator to generate electromagnetic force, attracts the bearing rotor, and drives the position of the spindle to change. This process is repeated continuously, and eventually the spindle remains suspended near the preset reference position.

[0005] Since the controller and the power amplifier are generally installed outside the casing, the various components need to be connected using wires, terminals or other connection methods, which will result in a larger volume of the entire magnetic bearing, more wiring, and a cumbersome installation process. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present application is to provide a magnetic bearing stator, a radial magnetic bearing and a motor, which can reduce the number of final assembly parts, improve the integration of the magnetic bearing and simplify the assembly process.

[0007] In order to solve the above problems, the present application provides a magnetic bearing stator, including a stator core, a coil winding, a coil frame and an integrated circuit board, the coil frame is assembled on the stator core, the coil winding is wound on the coil frame, the integrated circuit board is assembled on the coil frame, and the controller element and the power amplifier element are integrated on the integrated circuit board.

[0008] Preferably, a mounting groove is provided on a side of the coil frame away from the stator core, and the integrated circuit board is assembled in the mounting groove.

[0009] Preferably, the integrated circuit board also includes a PCB mainboard, and the controller components and the power amplifier components are integrated on the PCB mainboard.

[0010] Preferably, auxiliary patch components and / or pluggable connection interfaces are also integrated on the PCB main board.

[0011] Preferably, the coil windings are directly wired to the PCB main board.

[0012] Preferably, the PCB main board is annular, and the shape of the PCB main board matches the shape of the coil skeleton.

[0013] Preferably, the stator of the magnetic bearing is coated with an insulating layer.

[0014] Preferably, the integrated circuit board is a prefabricated part.

[0015] According to another aspect of the present application, a radial magnetic bearing is provided, comprising a magnetic bearing stator, wherein the magnetic bearing stator is the magnetic bearing stator described above.

[0016] According to another aspect of the present application, a motor is provided, comprising a magnetic bearing stator, wherein the magnetic bearing stator is the magnetic bearing stator described above.

[0017] The magnetic bearing stator provided by the present application includes a stator core, a coil winding, a coil frame and an integrated circuit board, wherein the coil frame is assembled on the stator core, the coil winding is wound on the coil frame, the integrated circuit board is assembled on the coil frame, and the controller element and the power amplifier element are integrated on the integrated circuit board. In the present application, the controller element and the power amplifier element are integrated on the integrated circuit board, so that the controller element, the power amplifier component and the bearing stator are integrated into one, and there is no need to assemble the controller element and the power amplifier element separately, which can save the wires and connectors required in the connection process, effectively solve the problem of many parts and complicated assembly of the magnetic bearing assembly, improve the integration and safety of the magnetic bearing, simplify the assembly process, and reduce the design difficulty and processing cost of other related components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a magnetic bearing stator according to an embodiment of the present application;

[0019] Figure 2 This is a schematic structural diagram of a magnetic bearing stator according to an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of an integrated circuit board of a magnetic bearing stator according to an embodiment of the present application;

[0021] Figure 4 It is a schematic side view of the structure of an integrated circuit board of a magnetic bearing stator according to an embodiment of the present application.

[0022] The reference numerals are:

[0023] 1. Stator core; 2. Coil winding; 3. Coil frame; 4. Controller components; 5. Power amplifier components; 6. Mounting slot; 7. PCB motherboard; 8. Auxiliary patch components; 9. Pluggable connection interface. DETAILED DESCRIPTION

[0024] See also Figures 1 to 4 As shown, according to an embodiment of the present application, the stator of the magnetic bearing includes a stator core 1, a coil winding 2, a coil frame 3 and an integrated circuit board, the coil frame 3 is assembled on the stator core 1, the coil winding 2 is wound on the coil frame 3, the integrated circuit board is assembled on the coil frame 3, and the controller element 4 and the power amplifier element 5 are integrated on the integrated circuit board.

[0025] In the present application, the controller element 4 and the power amplifier element 5 are integrated on the integrated circuit board, so that the controller element 4, the power amplifier element 5 and the bearing stator are integrated into one, and there is no need to assemble the controller element 4 and the power amplifier element 5 separately, which can save the wires and connectors required in the connection process, and effectively solve the problem of many parts and complicated assembly of the magnetic levitation bearing, improve the integration and safety of the magnetic levitation bearing, simplify the assembly process, and reduce the design difficulty and processing cost of other related components.

[0026] In this embodiment, the stator core 1 is made of a soft magnetic laminate material with good magnetic conductivity; the coil winding 2 is made of enameled wire wound according to the designed number of turns; and the coil frame 3 is made of plastic or other non-conductive and high-strength materials. The controller element 4 and the power amplifier element 5 are arranged on the integrated circuit board of the magnetic bearing in an integrated manner, so that they are integrated with the bearing stator through the integrated circuit board, and there is no need to separately arrange the controller element 4 or the power amplifier element 5 outside the housing, so that the number of final assembly parts and components can be reduced, the assembly steps and time can be reduced, and the overall volume of the magnetic bearing can be reduced.

[0027] The coil frame 3 is provided with a mounting groove 6 on one side away from the stator core 1, and the integrated circuit board is assembled in the mounting groove 6. By providing the mounting groove 6 on the coil frame 3, the integrated circuit board can be conveniently positioned and installed, the installation difficulty can be reduced, and it is more convenient to make the integrated circuit board and the stator core 1 into an integrated structure.

[0028] In this embodiment, the integrated circuit board further includes a PCB main board 7, and the controller element 4 and the power amplifier element 5 are integrated on the PCB main board 7. The PCB main board 7 is generally a part of the bearing stator structure, and is used to achieve connection with the coil winding 2. Therefore, the controller element 4 and the power amplifier element 5 are integrated on the PCB main board 7, and there is no need to add an additional circuit board. The structure of the bearing stator itself can be reasonably used to achieve the integration of components, and the modification cost is low and easy to implement.

[0029] Auxiliary patch components 8 and / or pluggable connection interfaces 9 are also integrated on the PCB main board 7. The purpose of setting the pluggable connection interface 9 is that when wiring, the wiring of the coil winding 2 can be directly connected to the PCB main board 7 through the design of the PCB main board 7, and then the line on the PCB main board 7 is used to electrically connect the pluggable connection interface 9. When the bearing stator is connected to the outside, the external wiring can be directly connected through the pluggable connection interface 9, without the need for additional wiring, bare wires or live metal, better safety, and fewer lead wires. A radial magnetic suspension bearing only needs at least 1 way with 2 lead power lines, and 1 2-pin adapter can realize the function, which effectively reduces the material cost.

[0030] Preferably, the coil winding 2 is directly wired to the PCB main board 7. After the wire ends of the coil winding 2 are directly connected to the PCB main board 7, there is basically no other wiring on the bearing stator. Since the pluggable connection interface 9 forms a circuit through a printed board, it can further reduce the amount of wires, save complicated circuits, and reduce the difficulty of wiring.

[0031] The PCB main board 7 is ring-shaped, and the shape of the PCB main board 7 matches the shape of the coil frame 3, so that the controller component 4 and the power amplifier component 5 can be conveniently set at the corresponding positions of the PCB main board 7, thereby shortening the distance between the connector of the coil winding 2 and the wiring position on the PCB main board 7 as much as possible, shortening the connector length, and reducing the wiring amount.

[0032] Preferably, the stator of the magnetic bearing is coated with an insulating layer. In this embodiment, by coating the stator of the magnetic bearing with an insulating layer, the stator core 1, the coil winding 2, the coil frame 3 and the integrated circuit board can form an integrated packaging structure, leaving only the pluggable connection interface 9 outside, which can ensure the wiring function of the stator of the magnetic bearing, and at the same time eliminate all exposed metals, improve the overall electrical safety, and reduce the design difficulty and processing cost of the external housing and other related components.

[0033] The integrated circuit board is a prefabricated part, which can further reduce assembly costs, reduce assembly parts and assembly steps, and improve assembly efficiency.

[0034] The assembly process of the magnetic bearing stator is as follows: the coil skeleton 3 is first assembled on the stator core 1, and then the enameled wire is wound into the corresponding coil cavity to form the coil winding 2. Next, the integrated circuit board is fixed to the coil skeleton 3 and connected to the corresponding output terminal of the coil winding 2. Then, a power-on test is performed. If there is no abnormality, the exposed metal is sprayed with PCB three-proof paint. Only one live part, the pluggable connection interface 9, is left visible in the entire assembly.

[0035] The integrated circuit board is a prefabricated component, which is made by welding the controller component 4, the auxiliary patch component 8, the power amplifier component 5 and the pluggable connection interface 9 to the PCB main board 7 according to the design requirements and completing the power-on test.

[0036] The controller element 4 and the power amplifier element 5 of the magnetic bearing stator are integrated on a PCB mainboard 7, and the PCB mainboard 7 is directly connected to the bearing coil winding 2. After the three-proof paint is sprayed, the entire module only has a pluggable connection interface 9 to connect to the outside world. The entire system has no other wiring except external wiring, no exposed live metal, and only needs power supply to realize the function after the overall installation. This structure eliminates the complicated wiring in the ordinary magnetic bearing system and reduces the number of parts that need to be installed.

[0037] According to an embodiment of the present application, the radial magnetic bearing includes a magnetic bearing stator, and the magnetic bearing stator is the magnetic bearing stator mentioned above.

[0038] According to an embodiment of the present application, the motor includes a magnetic bearing stator, which is the magnetic bearing stator mentioned above.

[0039] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0040] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A magnetic bearing stator, characterized in that: The invention comprises a stator core (1), a coil winding (2), a coil frame (3) and an integrated circuit board, wherein the coil frame (3) is mounted on the stator core (1), the coil winding (2) is wound on the coil frame (3), the integrated circuit board is mounted on the coil frame (3), and a controller element (4) and a power amplifier element (5) are integrated on the integrated circuit board; A mounting groove (6) is provided on a side of the coil frame (3) away from the stator core (1), and the integrated circuit board is mounted in the mounting groove (6); The integrated circuit board also includes a PCB mainboard (7), and the controller element (4) and the power amplifier element (5) are both integrated on the PCB mainboard (7).

2. The magnetic bearing stator according to claim 1, characterized in that: The PCB mainboard (7) is also integrated with an auxiliary patch element (8) and / or a pluggable connection interface (9).

3. The magnetic bearing stator according to claim 1, characterized in that: The coil winding (2) is directly wired to the PCB mainboard (7).

4. The magnetic bearing stator according to claim 1, characterized in that: The PCB main board (7) is ring-shaped, and the shape of the PCB main board (7) matches the shape of the coil skeleton (3).

5. The magnetic bearing stator according to claim 1, characterized in that: The magnetic bearing stator is coated with an insulating layer.

6. The magnetic bearing stator according to claim 1, characterized in that: The integrated circuit board is a prefabricated part.

7. A radial magnetic bearing, comprising a magnetic bearing stator, characterized in that: The magnetic bearing stator is the magnetic bearing stator according to any one of claims 1 to 6.

8. A motor, comprising a magnetic bearing stator, characterized in that: The magnetic bearing stator is the magnetic bearing stator according to any one of claims 1 to 6.

Images