Non-contact two-dimensional electromagnetic actuator

Abstract

The application provides a non-contact two-dimensional electromagnetic actuator, which comprises a magnetic shield, a magnetic separator, a magnetic conductor, a coil, a permanent magnet pole and a coil support; the magnetic shield is arranged in a box-shaped structure with one end being open, the magnetic separator is mounted on the inner wall of the magnetic shield, and the magnetic conductor is sleeved on the inner side of the magnetic separator; the permanent magnet pole is mounted on the symmetrical side walls of the inner side of the magnetic conductor, the coil support is fixedly mounted in the middle of the magnetic shield, the coil is fixedly mounted on the coil support, and the coil is located between the permanent magnet poles on both sides; the first mounting block and the second mounting block are respectively mounted on both ends of the magnetic shield, the magnetic shield is connected with a controlled load through the first mounting block, and the magnetic shield is connected with a platform cabin through the second mounting block. The coil support and the coil are limited, the installation precision between the coil and the magnet is ensured, and the influence of the magnetic field leakage of the magnet on the satellite attitude control can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic actuator structure, in particular, to a non-contact two-dimensional electromagnetic actuator; especially to a non-contact two-dimensional electromagnetic actuator for high-precision attitude adjustment of a satellite in orbit. BACKGROUND

[0002] The dynamic-static separation satellite platform breaks the traditional satellite load and platform fixed design idea, adopts a new design method of "dynamic-static separation non-contact, master-slave decoupling high precision" based on a non-contact two-dimensional electromagnetic actuator, breaks through the technical bottleneck of "difficult to measure and control" of micro-vibration in the fixed design method, and fundamentally solves the major problem that the load pointing accuracy and stability are difficult to be greatly improved. The non-contact two-dimensional electromagnetic actuator is an important actuator in the control system of the dynamic-static separation satellite platform, and has high requirements for product structure, installation precision and magnetic field leakage. Therefore, a non-contact two-dimensional electromagnetic actuator with high installation precision and preventing magnetic field leakage is needed.

[0003] Similar inventions include: a series high-energy electromagnetic actuator, patent number CN1431757A. The patent discloses a series electromagnetic actuator, which adopts multiple high-strength magnets in series. There are obvious differences between the two. The purpose of this patent is to increase the effective number of turns of the electromagnetic coil that can be arranged by connecting multiple magnetic conductive plates in series, thereby greatly increasing the actuator excitation force, while the present application focuses on adjusting the attitude and position of the satellite load cabin through electric field force.

[0004] Similar inventions include: a swing electromagnetic actuator, patent number CN101478198A. The patent discloses a swing electromagnetic actuator, which uses a wheel disc to provide a force arm to realize swinging. There are obvious differences between the two. The purpose of this patent is to realize reciprocating motion within a certain angle range and a certain frequency band range through sensors, wheel discs and the like, while the present application adopts multiple directional mechanical limiting measures, and the output force direction is located in the coil plane.

[0005] Similar inventions include: an electromagnetic actuator for active vibration control, patent number CN107763127A. The patent discloses an electromagnetic actuator for active vibration control, which adopts a spring sheet connected with an actuator rod to realize active vibration control. There are obvious differences between the two. The patent realizes vibration control by pressing two spring sheets in the end cover, while the present application adopts a coil and a magnetic pole to control the satellite platform and the load to be non-contact, and adopts a limiting measure to ensure the reliability of the actuator.

[0006] Similar invention has: a composite rigid actuator, patent number CN102013755A. The patent discloses a special actuator formed by connecting ball screw actuator and piezoelectric ceramic actuator in series, and the invention has the advantages of structure / mechanism vibration and shape active control. The present invention is obviously different from it, and the present invention focuses on electromagnetic actuator, which has obvious advantages in product installation precision and magnetic field leakage control.

[0007] Similar invention has: integrated inertial electromagnetic actuator, patent number CN103791013A. The patent discloses an electromagnetic actuator integrating accelerometer, controller and DC fan together, and the invention has the advantages of being able to be used immediately after being connected to power supply. The present invention is obviously different from it, and the present invention focuses on application of spacecraft in on-orbit environment, has the advantages of high precision and high reliability, and innovatively sets mechanical limit to prevent complete separation between cabin bodies caused by control system failure. SUMMARY

[0008] In view of the defects in the prior art, the purpose of the present application is to provide a non-contact two-dimensional electromagnetic actuator.

[0009] According to the non-contact two-dimensional electromagnetic actuator provided by the present application, the non-contact two-dimensional electromagnetic actuator comprises a magnetic shield, a magnetic shield, a magnetic conductor, a coil, a permanent magnet magnetic pole and a coil support.

[0010] The magnetic shield is provided as an open box type structure, the magnetic shield is provided with the magnetic shield on the inner wall, and the magnetic shield is provided with the magnetic shield on the inner side.

[0011] The magnetic conductor is provided with the permanent magnet magnetic pole on the inner side of the symmetric side wall, the magnetic shield is provided with the coil support on the middle part, the coil support is provided with the coil on the upper part, and the coil is located between the two permanent magnet magnetic poles.

[0012] The magnetic shield is provided with a first mounting block and a second mounting block on both ends respectively, the magnetic shield is connected with the controlled load through the first mounting block, and the magnetic shield is connected with the platform cabin through the second mounting block.

[0013] Preferably, the coil support dust cover is provided at the opening of the magnetic shield, and the coil support is fixedly installed on the coil support dust cover.

[0014] Preferably, the first mounting block is fixedly installed on the outer side of one end of the opening of the magnetic shield through screw cooperation with the adapter nut, and the first mounting block is connected with the controlled load on the side away from the magnetic shield.

[0015] Preferably, the coil support dust cover is fixedly installed with the second mounting block on the side opposite to the coil support, and the second mounting block is connected with the platform cabin on the side opposite to the magnetic shield.

[0016] Preferably, when the coil is electrified, the coil generates an electromagnetic force in the magnetic field between the two sides of the permanent magnet poles, and the output direction of the electromagnetic force is in the plane where the coil is located.

[0017] Preferably, when the first mounting block and the second mounting block are connected with the controlled load and the platform cabin respectively through the reversing support, the magnetic shield rotates, and the output direction of the electromagnetic force of the coil rotates.

[0018] The reversing support comprises a first side surface and a second side surface forming an included angle.

[0019] The first side surface is connected with the first mounting block, and the second side surface is connected with the controlled load, or the first side surface is connected with the second mounting block, and the second side surface is connected with the platform cabin, and the rotation angle of the magnetic shield and the output direction of the electromagnetic force of the coil is the same as the included angle between the first side surface and the second side surface.

[0020] Preferably, the magnetic shield is provided with a connecting tool fixedly installed on one side close to the opening of the magnetic shield.

[0021] Preferably, a mouth-shaped limiting block is fixedly installed on the second mounting block through the coil support dust cover.

[0022] Preferably, an adapter frame is fixedly installed on one side close to the opening of the magnetic shield, and a part of the adapter frame on the side opposite to the magnetic shield is located on the side of the middle part of the mouth-shaped limiting block.

[0023] Preferably, one end of a limiting rod is fixedly connected with the adapter frame, and the other end of the limiting rod is vertically passed through the center of the mouth-shaped limiting block, and the limiting rod is limited in the up-down direction by the adapter frame, so as to avoid that the coil assembly where the coil support and the coil are located is completely separated from the magnet assembly where the magnetic conductor and the magnetic shield are located, and also avoid that the controlled load and the platform cabin connected with the coil assembly and the magnet assembly respectively are completely separated.

[0024] Meanwhile, since the connection and limitation of the magnet assembly and the coil assembly are completed inside the magnetic shield, it is not necessary to design the connection structure of the magnet assembly and the coil assembly outside the magnetic shield, thereby reducing the risk of external hooking.

[0025] Preferably, the magnetic shield and the magnetic shield are integrally processed and formed by industrial pure iron, and the first mounting block and the second mounting block are processed and formed by aluminum alloy.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1、The application sets mechanical limit between three movement directions of the coil relative to the magnetic pole of the permanent magnet, ensures the installation precision between the coil and the magnet, and can avoid the influence of the magnetic field leakage of the magnet on the satellite attitude control;

[0028] 2、The relative movement between the magnet and the coil is interfered by the mouth-shaped limit block and the limit rod, so as to prevent the complete separation of the magnet and the coil caused by the fault of the control system;

[0029] 3、The application has no protrusion connection outside, reduces the risk of hooking, has compact overall structure, indirect appearance, large structural rigidity, and good applicability and inheritability. BRIEF DESCRIPTION OF DRAWINGS

[0030] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0031] Figure 1 It is a whole structure diagram of the non-contact two-dimensional electromagnetic actuator;

[0032] Figure 2 It is a bottom view of the electromagnetic actuator;

[0033] Figure 3 It is Figure 2 a sectional view of F-F;

[0034] Figure 4 It is Figure 3 a sectional view of R-R;

[0035] Figure 5 It is an internal view of the electromagnetic actuator;

[0036] Figure 6 It is Figure 5 a sectional view of A-A;

[0037] Figure 7 It is a structure schematic diagram of the coil assembly;

[0038] Figure 8 It is Figure 7 a sectional view of B-B;

[0039] Figure 9 It is a local enlarged view of the mouth-shaped limit block;

[0040] Figure 10 It is a structure schematic diagram of the limit rod matched with the mouth-shaped limit block;

[0041] Figure 11 It is a structure schematic diagram of the electromagnetic actuator when the installation connection tool is installed;

[0042] Figure 12The electromagnetic actuator works as shown in the principle diagram.

[0043] As shown in the figure:

[0044] DETAILED DESCRIPTION

[0045] The application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the application. These are within the scope of protection of the application.

[0046] Example 1

[0047] As shown in the figure: Figures 1 to 7 The embodiment includes a magnetic shield 1, a magnetic separator 2, a magnetic conductor 3, a coil 5, a permanent magnet pole 6, and a coil support 7. The magnetic shield 1 is set as an open box structure, the magnetic shield 1 inner wall is installed with the magnetic separator 2, the magnetic separator 2 inner side is sleeved with the magnetic conductor 3, the magnetic conductor 3 inner side symmetric side wall is installed with the permanent magnet pole 6, the magnetic shield 1 middle part is fixedly installed with the coil support 7, the coil support 7 is fixedly installed with the coil 5, the coil 5 is located between the two permanent magnet poles 6, the magnetic shield 1 two ends are respectively installed with a first mounting block 4 and a second mounting block 11, the magnetic shield 1 is connected with a controlled load 16 through the first mounting block 4, and the magnetic shield 1 is connected with a platform cabin 17 through the second mounting block 11. The magnetic shield 1 and the magnetic separator 2 are integrally processed and formed by industrial pure iron, and the first mounting block 4 and the second mounting block 11 are processed and formed by aluminum alloy.

[0048] The coil support dust cover 8 is arranged at the opening of the magnetic shield 1, and the coil support 7 is fixedly installed on the coil support dust cover 8. The second mounting block 11 is fixedly installed on the side of the coil support dust cover 8 away from the coil support 7, and the second mounting block 11 is connected with the platform cabin 17 on the side away from the magnetic shield 1. The first mounting block 4 is fixedly installed on the outside of the end of the magnetic shield 1 away from the opening through screw cooperation with the adapter nut 12, and the first mounting block 4 is connected with the controlled load 16 on the side away from the magnetic shield 1.

[0049] As shown in the figure: Figures 8 to 10 The mouth-shaped limiting block 9 passes through the coil support dust cover 8 and is fixedly installed on the second mounting block 11, the magnetic separator 2 is fixedly installed with the adapter frame 13 on the side close to the opening of the magnetic shield 1, and the adapter frame 13 is partially located on the side of the mouth-shaped limiting block 9 at the middle position. The limiting rod 10 is fixedly connected with the adapter frame 13 at one end and vertically penetrates the center of the mouth-shaped limiting block 9 at the other end.

[0050] As shown in the figure: Figure 11As shown, the magnetic shield 1 is connected with the connecting tool 14 on the side, one end of the connecting tool 14 is connected with the first mounting block 4, and the other end is connected with the second mounting block 11.

[0051] As shown, Figure 12 When the coil 5 is energized, the coil 5 generates electromagnetic force in the magnetic field between the two permanent magnet poles 6, and the output direction of the electromagnetic force is in the plane where the coil 5 is located. When the first mounting block 4 and the second mounting block 11 are connected with the controlled load 16 and the platform cabin 17 through the reversing support 15 respectively, the magnetic shield 1 rotates, the output direction of the electromagnetic force of the coil 5 rotates, the reversing support 15 includes a first side and a second side forming an included angle, the first side is connected with the first mounting block 4, the second side is connected with the controlled load 16, or the first side is connected with the second mounting block 11, and the second side is connected with the platform cabin 17. The rotation angle of the magnetic shield 1 and the output direction of the electromagnetic force of the coil 5 is the same as the included angle of the first side and the second side.

[0052] Embodiment 2

[0053] Embodiment 2 is a preferred example of embodiment 1.

[0054] As shown, Figure 1 Two permanent magnet poles 6 are arranged on both sides of the coil 5, with a distance of 5mm, and the envelope size of the coil 5 is 69mmx69mmx4mm. The magnetic shield 1 is an open rectangular box-shaped part, and the magnetic shield 2 is a part with an opening structure. The materials of both are industrial pure iron surface plating, and the magnetic shield 2 is located inside the magnetic shield 1. The gap between the outer wall of the coil support dust cover 8 and the inner wall of the magnetic shield 1 is not less than 5mm, which is mechanically limited by the outer wall of the coil support dust cover 8 and the inner wall of the magnetic shield 1, so as to prevent the permanent magnet poles 6 from impacting on the coil 5 during movement.

[0055] As shown, Figures 2 to 6 The magnetic shield 2 is arranged in the magnetic shield 1, and the two permanent magnet poles 6 are fixed in the middle of the inner side wall of the magnetic conductor 3 and the magnetic shield 2, which are glued by aerospace structure. The 4-M3 screws pass through the first mounting block 4, the top of the magnetic shield 1 in turn from the top and are fixed by the adapter nut 12. The inner shield assembly is fixed on the magnetic shield 1 by 6-M2.5 screws, and the inner shield assembly is composed of the magnetic shield 2, the magnetic conductor 3 and the permanent magnet poles 6.

[0056] As shown, Figures 7 to 8 The coil 5 is located in the center of the magnetic shield 1. The coil 5 is fixed to the coil support 7 by 4-M3 screws, and the 4-M3 screws pass through the second mounting block 11, the coil support dust cover 8 and the coil support 7 in turn from the bottom. The second mounting block 11 is made of aluminum alloy and provides a threaded interface for mounting the platform cabin 17.

[0057] As shown, Figures 9 to 10As shown, the inner opening size of the mouth limiting block 9 is 14mmx14mmx5mm, the mouth limiting block 9 passes through the coil support dust cover 8 and is fixed on the second mounting block 11 through an M3 nut, the limiting rod 10 is located at the center of the mouth limiting block 9, the limiting rod 10 is fixed to the adapter frame 13, the adapter frame 13 is fixed to the magnetic shield 2 through a screw 4-M2.5, thereby realizing mechanical limiting in the up and down directions. The gap between the outer wall of the coil support dust cover 8 and the inner wall of the magnetic shield 1 is not less than 5mm, and horizontal plane mechanical limiting is realized by the outer wall of the coil support dust cover 8 and the inner wall of the magnetic shield 1.

[0058] As shown in Figure 11 To ensure the installation accuracy of the initial state of the non-contact two-dimensional electromagnetic actuator, the connecting tool 14 fixes the first mounting block 4 and the second mounting block 11 in the assembly state. The connecting tool 14 is removed after the installation on the satellite is completed.

[0059] As shown in Figure 12 The first mounting block 4 is connected with the passive control load 16, and the magnetic force output direction of the coil 5 is located in the plane of the coil 5. The coil 5 can be installed in different spatial directions by using the reversing support 15.

[0060] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] The specific embodiments of the present application have been described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A non-contact two-dimensional electromagnetic actuator, characterized in that, include: Magnetic shield (1), magnetic shield (2), magnetic conductor (3), coil (5), permanent magnet pole (6) and coil support (7); The magnetic shield (1) is configured as a box-shaped structure with one end open. The magnetic shield (1) is installed on the inner wall of the magnetic shield (1), and the magnetic conductor (3) is fitted inside the magnetic shield (2). The permanent magnet poles (6) are installed on the symmetrical inner sidewalls of the magnetic conductor (3), the coil bracket (7) is fixedly installed in the middle of the magnetic shield (1), the coil (5) is fixedly installed on the coil bracket (7), and the coil (5) is located between the permanent magnet poles (6) on both sides. The magnetic shield (1) is equipped with a first mounting block (4) and a second mounting block (11) at both ends. The magnetic shield (1) is connected to the controlled load (16) through the first mounting block (4), and the magnetic shield (1) is connected to the platform compartment (17) through the second mounting block (11). A coil support dust cover (8) is provided at the opening of the magnetic shield (1), and the bottom of the coil support (7) is fixedly installed on the coil support dust cover (8); The mouth-shaped limiting block (9) passes through the dust cover (8) of the coil bracket and is fixedly installed on the second mounting block (11). The magnetic shield (2) is fixedly installed with the adapter frame (13) on the side near the opening of the magnetic shield (1). The part of the adapter frame (13) facing away from the magnetic shield (2) is located on the side of the middle position of the mouth-shaped limiting block (9). One end of the limiting rod (10) is fixedly connected to the adapter frame (13), and the other end passes vertically through the center of the mouth-shaped limiting block (9); The limiting rod (10) is fixed to the adapter frame (13), and the adapter frame (13) is fixed to the magnetic shield (2) by screws, thereby realizing mechanical limiting in both the upper and lower directions; the gap between the outer wall of the coil bracket dust cover (8) and the inner wall of the magnetic shield (1) is not less than 5mm, and the horizontal mechanical limiting is achieved by relying on the outer wall of the coil bracket dust cover (8) and the inner wall of the magnetic shield (1).

2. The non-contact two-dimensional electromagnetic actuator according to claim 1, characterized in that: The magnetic shield (1) is fixedly mounted on the outer side of one end facing away from the opening by screws and adapter nuts (12). The first mounting block (4) is connected to the controlled load (16) on the side of the first mounting block (4) facing away from the magnetic shield (1).

3. The non-contact two-dimensional electromagnetic actuator according to claim 1, characterized in that: The second mounting block (11) is fixedly installed on the side of the coil support dust cover (8) facing away from the coil support (7), and the second mounting block (11) is connected to the platform compartment (17) on the side facing away from the magnetic shield (1).

4. The non-contact two-dimensional electromagnetic actuator according to claim 1, characterized in that: When the coil (5) is energized, the coil (5) generates an electromagnetic force in the magnetic field between the permanent magnet poles (6) on both sides, and the output direction of the electromagnetic force is located in the plane where the coil (5) is located.

5. The non-contact two-dimensional electromagnetic actuator according to claim 4, characterized in that: When the first mounting block (4) and the second mounting block (11) are connected to the controlled load (16) and the platform compartment (17) respectively through the reversing bracket (15), the magnetic shield (1) rotates, and the output direction of the electromagnetic force of the coil (5) rotates; The reversing bracket (15) includes a first side and a second side forming an included angle; The first mounting block (4) is connected to the first side, and the controlled load (16) is connected to the second side, or the second mounting block (11) is connected to the first side, and the platform compartment (17) is connected to the second side. The rotation angle of the electromagnetic force output direction of the magnetic shield (1) and the coil (5) is the same as the included angle between the first side and the second side.

6. The non-contact two-dimensional electromagnetic actuator according to claim 1, characterized in that: The magnetic shield (1) is mounted on a side of a connecting fixture (14), one end of which is connected to a first mounting block (4), and the other end is connected to a second mounting block (11).

7. The non-contact two-dimensional electromagnetic actuator according to claim 1, characterized in that: The magnetic shield (1) and the magnetic isolation body (2) are integrally formed from industrial pure iron, and the first mounting block (4) and the second mounting block (11) are formed from aluminum alloy.

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