A four-side hybrid linear stepping motor with a ring winding

Abstract

The application provides a ring winding four-side mixed linear stepping motor. The motor comprises a primary assembly (1), an upper secondary assembly (2), a lower secondary assembly (3), a front secondary assembly (4) and a rear secondary assembly (5), all of which are salient pole structures, and the five assemblies form a "U" shaped motor structure and a four-side air gap. The motor has the advantages of high thrust density, simple structure, convenient machining and assembly, easy heat dissipation and the like.

Description

Technical Field

[0001] This invention belongs to the field of motor manufacturing technology, specifically relating to a four-sided hybrid linear stepper motor with annular winding. Background Technology

[0002] With the development of advanced technologies, hybrid linear stepper motors are gradually replacing traditional linear drive structures: hybrid stepper motor + transmission device, playing a vital role in aerospace, medical, and electrical electronics fields. Currently, hybrid linear stepper motors are structurally divided into flat and cylindrical types. Cylindrical hybrid stepper motors have high thrust density and significant advantages in motor drive performance; however, their manufacturing is difficult due to the hard and brittle nature of permanent magnet materials and limitations in processing technology. Compared to cylindrical hybrid linear stepper motors, flat hybrid linear stepper motors are easier to manufacture, but they are mostly single-sided or double-sided, with the windings on other sides not being utilized. This results in a significantly reduced driving force compared to cylindrical hybrid linear stepper motors of the same stroke, failing to fully leverage the high thrust density advantage of flat hybrid linear stepper motors. Summary of the Invention

[0003] To overcome the shortcomings of existing hybrid linear stepper motors in thrust density, this invention provides a four-sided hybrid linear stepper motor with a toroidal winding. It includes a primary component (1), an upper secondary component (2), a lower secondary component (3), a front secondary component (4), and a rear secondary component (5). All components are salient-pole structures, and the five components form a U-shaped motor structure with a four-sided air gap. This invention has advantages such as high thrust density, simple structure, convenient processing and assembly, and easy heat dissipation.

[0004] A ring-wound four-sided hybrid linear stepper motor is characterized by comprising: a primary component (1), an upper secondary component (2), a lower secondary component (3), a front secondary component (4), and a rear secondary component (5). All components are salient pole structures. The upper secondary component (2), the lower secondary component (3), the front secondary component (4), and the rear secondary component (5) are sequentially connected and located on the upper side, lower side, left side, and right side of the primary component (1), respectively. The five components form a "U"-shaped motor structure and form a four-sided air gap.

[0005] The primary component (1) includes a primary iron core (6) and an armature winding (7). The primary iron core (6) has several protruding magnetic poles distributed along the axial direction on all four sides. Each magnetic pole has small teeth on its pole face. The armature winding (7) is located in the slot of the primary iron core (6).

[0006] The secondary component (2) includes a secondary permanent magnet (8) and a secondary iron core (9). The secondary permanent magnet (8) is installed between two sections of the secondary iron core (9). The secondary permanent magnet (8) is magnetized in the horizontal direction. The secondary iron core (9) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6). The small teeth on the two sections of the secondary iron core (9) miss each other by 1 / 2 tooth pitch.

[0007] The secondary component (3) includes a secondary permanent magnet (10) and a secondary iron core (11). The secondary permanent magnet (10) is installed between two secondary iron cores (11). The secondary permanent magnet (10) is magnetized in the horizontal direction, while the corresponding primary permanent magnet (8) is magnetized in the opposite direction. The secondary iron core (11) has small teeth along the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two secondary iron cores (11) miss each other by 1 / 2 tooth pitch.

[0008] The aforementioned secondary component (4) includes a secondary permanent magnet (12) and a secondary iron core (13). The secondary permanent magnet (12) is installed between two sections of the secondary iron core (13). The secondary permanent magnet (12) is magnetized in the vertical direction. The secondary iron core (13) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6). The small teeth on the two sections of the secondary iron core (13) miss each other by 1 / 2 tooth pitch.

[0009] The secondary component (5) includes a secondary permanent magnet (14) and a secondary iron core (15). The secondary permanent magnet (14) is installed between two sections of the secondary iron core (15). The secondary permanent magnet (14) is magnetized in the vertical direction, and the corresponding secondary permanent magnet (12) is magnetized in the opposite direction. The secondary iron core (15) has small teeth along the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two sections of the secondary iron core (15) miss each other by 1 / 2 tooth pitch.

[0010] Furthermore, all components can act as motor movers to perform linear motion.

[0011] Furthermore, the armature winding (7) adopts a toroidal winding structure.

[0012] Furthermore, none of the small teeth adopt a skewed pole structure.

[0013] Furthermore, the iron cores are all made of magnetically conductive materials, including silicon steel sheets.

[0014] Furthermore, the permanent magnets mentioned above all use permanent magnet materials including neodymium iron boron, samarium cobalt, and ferrite.

[0015] The beneficial effects of the present invention are: (1) The present invention adopts a four-sided "U" shaped motor structure, which can effectively increase the thrust density of the motor; (2) Since the upper secondary permanent magnet, the lower secondary permanent magnet, the front secondary permanent magnet and the rear secondary permanent magnet are on the outside, the present invention has the advantage of easy heat dissipation and can effectively reduce the risk of permanent magnet demagnetization at high temperature; (3) Since the primary winding adopts a ring winding, the present invention can effectively reduce the length of the end winding, reduce the size of the end copper loss, and improve the motor efficiency; (4) The armature winding and the permanent magnet cooperate to directly drive the primary component or the magnetic pole component to make linear motion; (5) The present invention can directly drive the load to make linear motion, and has the advantages of high thrust density and easy processing and assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a four-sided hybrid linear stepper motor with an annular winding according to the present invention.

[0017] Figure 2 This is a schematic diagram of the basic component structure;

[0018] Figure 3 This is a schematic diagram of the primary iron core structure;

[0019] Figure 4 This is a schematic diagram of the armature winding distribution;

[0020] Figure 5 This is a structural diagram of the upper secondary component, the lower secondary component, the previous primary component, and the subsequent secondary component;

[0021] In the diagram: 1. Primary component, 2. Upper secondary component, 3. Lower secondary component, 4. Previous secondary component, 5. Lower secondary component, 6. Primary core, 7. Armature winding, 8. Upper secondary permanent magnet, 9. Upper secondary core, 10. Lower secondary permanent magnet, 11. Lower secondary core, 12. Previous secondary permanent magnet, 13. Previous secondary core, 14. Lower secondary permanent magnet, 15. Lower secondary core. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. The present invention includes, but is not limited to, the following embodiments. In this embodiment, the number of phases of the primary armature winding is set to m = 2, the number of magnetic poles per phase on the stator core is i = 4, and the number of salient pole teeth on the secondary winding is Zr = 50. Since the coupling area between the secondary and primary windings gradually decreases during linear motion, the inner salient pole teeth of the secondary winding are arranged axially to ensure the linear motion stroke.

[0023] like Figure 1As shown, this invention provides a four-sided hybrid linear stepper motor with a ring winding, comprising a primary component (1), an upper secondary component (2), a lower secondary component (3), a front secondary component (4), and a rear secondary component (5), all of which are salient pole structures. The upper secondary component (2), the lower secondary component (3), the front secondary component (4), and the rear secondary component (5) are sequentially connected and located above, below, to the left, and to the right of the primary component (1), respectively. The upper secondary component (2) and the lower secondary component (3) are parallel, as are the front secondary component (4) and the rear secondary component (5). The upper secondary component (2) is perpendicular to the front secondary component (4) and the rear secondary component (5). These five components form a U-shaped motor structure and constitute a four-sided air gap.

[0024] like Figure 2 and Figure 3 As shown, the primary component (1) includes a primary iron core (6) and an armature winding (7). The primary iron core (6) has several protruding magnetic poles distributed along the axial direction on all four sides, and each magnetic pole has small teeth on its pole face; the armature winding (7) adopts a ring winding structure and is set in the slot of the primary iron core (6).

[0025] like Figure 4 As shown, in the armature winding (7), coils 711 and 712 of phase A armature winding are connected in reverse series to form coil group 71; coils 713 and 714 are connected in reverse series to form coil group 72; coils 715 and 716 are connected in reverse series to form coil group 73; coils 717 and 718 are connected in reverse series to form coil group 74. Coil groups 71 and 72 are connected in reverse series, coil group 73 is connected in forward series, and coil group 74 is connected in reverse series to form phase A armature winding. Similarly, the coils under phase B (coils 721, 722, 723, 724, 725, 726, 727, and 728) are configured the same as in phase A.

[0026] The upper secondary component (2), the lower secondary component (3), the previous secondary component (4), and the subsequent secondary component (5) are as follows: Figure 5 As shown. The upper secondary component (2) includes an upper secondary permanent magnet (8) and an upper secondary iron core (9). The upper secondary permanent magnet (8) is installed between two upper secondary iron cores (9). The upper secondary permanent magnet (8) is magnetized in the horizontal direction. The upper secondary iron core (9) has small teeth in the axial direction. The tooth pitch is the same as the tooth pitch of the small teeth of the primary iron core (6). The small teeth on the two upper secondary iron cores (9) miss each other by 1 / 2 tooth pitch.

[0027] The secondary component (3) includes a secondary permanent magnet (10) and a secondary iron core (11). The secondary permanent magnet (10) is installed between two secondary iron cores (11). The secondary permanent magnet (10) is magnetized in the horizontal direction, and the corresponding upper secondary permanent magnet (8) and the secondary permanent magnet (10) are magnetized in opposite directions. The secondary iron core (11) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two secondary iron cores (11) miss each other by 1 / 2 tooth pitch.

[0028] The secondary component (4) includes a secondary permanent magnet (12) and a secondary iron core (13). The secondary permanent magnet (12) is installed between two sections of the secondary iron core (13). The secondary permanent magnet (12) is magnetized in the vertical direction. The secondary iron core (13) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6). The small teeth on the two sections of the secondary iron core (13) miss each other by 1 / 2 tooth pitch.

[0029] The secondary assembly (5) includes a secondary permanent magnet (14) and a secondary iron core (15). The secondary permanent magnet (14) is installed between two sections of the secondary iron core (15). The secondary permanent magnet (14) is in the vertical direction, and the corresponding primary permanent magnet (12) and the secondary permanent magnet (14) are magnetized in opposite directions. The secondary iron core (15) has small teeth along the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two sections of the secondary iron core (15) miss each other by 1 / 2 tooth pitch.

[0030] The armature winding (7) of the present invention adopts a ring winding. When the ring winding is energized, the inner and outer components that constitute the four-sided air gap can all become motor movers to drive the load to make linear motion. That is, the primary component (1) is connected to the load, and the secondary component (2), the next secondary component (3), the previous secondary component (4) and the next secondary component (5) serve as the motor stator. Conversely, the upper secondary component (2), the next secondary component (3), the previous secondary component (4) and the next secondary component (5) are connected to the load, and the primary component (1) serves as the motor stator.

[0031] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. In addition to the above embodiments, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A four-sided hybrid linear stepper motor with annular winding, characterized in that... include: Primary component (1), upper secondary component (2), lower secondary component (3), front secondary component (4) and rear secondary component (5), all components are salient pole structure. Among them, upper secondary component (2), lower secondary component (3), front secondary component (4) and rear secondary component (5) are connected in sequence and located on the upper side, lower side, left side and right side of primary component (1) respectively. The five components form a "U" shaped motor structure and form a four-sided air gap. The primary component (1) includes a primary iron core (6) and an armature winding (7). The primary iron core (6) has several protruding magnetic poles distributed along the axial direction on all four sides. Each magnetic pole has small teeth on its pole face. The armature winding (7) is located in the slot of the primary iron core (6). The secondary component (2) includes a secondary permanent magnet (8) and a secondary iron core (9). The secondary permanent magnet (8) is installed between two sections of the secondary iron core (9). The secondary permanent magnet (8) is magnetized in the horizontal direction. The secondary iron core (9) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6). The small teeth on the two sections of the secondary iron core (9) miss each other by 1 / 2 tooth pitch. The secondary component (3) includes a secondary permanent magnet (10) and a secondary iron core (11). The secondary permanent magnet (10) is installed between two secondary iron cores (11). The secondary permanent magnet (10) is magnetized in the horizontal direction, while the corresponding primary permanent magnet (8) is magnetized in the opposite direction. The secondary iron core (11) has small teeth along the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two secondary iron cores (11) miss each other by 1 / 2 tooth pitch. The aforementioned secondary component (4) includes a secondary permanent magnet (12) and a secondary iron core (13). The secondary permanent magnet (12) is installed between two sections of the secondary iron core (13). The secondary permanent magnet (12) is magnetized in the vertical direction. The secondary iron core (13) has small teeth in the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6). The small teeth on the two sections of the secondary iron core (13) miss each other by 1 / 2 tooth pitch. The secondary component (5) includes a secondary permanent magnet (14) and a secondary iron core (15). The secondary permanent magnet (14) is installed between two sections of the secondary iron core (15). The secondary permanent magnet (14) is magnetized in the vertical direction, and the magnetization direction of its corresponding primary permanent magnet (12) is opposite. The secondary iron core (15) has small teeth along the axial direction. The tooth pitch is the same as that of the small teeth of the primary iron core (6), and the small teeth on the two sections of the secondary iron core (15) miss each other by 1 / 2 tooth pitch.

2. The toroidal winding four-sided hybrid linear stepper motor according to claim 1, characterized in that: All components can act as motor actuators to perform linear motion.

3. A four-sided hybrid linear stepper motor with annular winding according to claim 1, characterized in that: The armature winding (7) adopts a toroidal winding structure.

4. The four-sided hybrid linear stepper motor with annular winding according to claim 1, characterized in that: None of the small teeth mentioned adopt a skewed pole structure.

5. A four-sided hybrid linear stepper motor with annular winding according to claim 1, characterized in that: The iron cores mentioned above are all made of magnetically conductive materials, including silicon steel sheets.

6. A four-sided hybrid linear stepper motor with annular winding according to claim 1, characterized in that: The permanent magnets mentioned above all use permanent magnet materials including neodymium iron boron, samarium cobalt, and ferrite.

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