A C-type winding long primary double-sided permanent magnet linear synchronous motor

Abstract

The invention discloses a C-type winding long primary bilateral permanent magnet linear synchronous motor, comprising a C-type winding support, an I-shaped mover, a slide rail frame and a C-type primary winding, wherein the C-type winding support comprises a left support and a right support of a C-shaped structure, the slide rail frame comprises a left slide rail frame and a right slide rail frame, the left support is provided with a left slide rail frame at the bottom and the top, and the right support is provided with a right slide rail frame at the bottom and the top, the left slide rail frame and the right slide rail frame are hollow tubular structures with left and right side surfaces hollowed out, the middle part of the I-shaped mover is sleeved in the gap between the left support and the right support, and the top and the bottom of the I-shaped mover are sleeved in the slide rail groove formed by the hollowing of the left slide rail frame and the right slide rail frame; the end length is reduced, the end space is saved, the resistance and inductance of the motor winding are reduced, and the motor efficiency is improved; the structure is compact and has a high thrust density.

Description

Technical Field

[0001] The present invention belongs to the field of permanent magnet linear synchronous motors, and specifically relates to a short-stroke C-type winding long primary permanent magnet linear motor, which is particularly suitable for high-speed and high-thrust applications with large thrust density requirements and strict volume, weight and space size constraints. Background Art

[0002] Compared with traditional rotary motors, linear motors use direct drive, which weakens the transmission links such as gears and chains in structure. They have outstanding advantages such as high thrust density, high precision and reliability, and are widely used in high-precision CNC machine tools, photolithography machines, 3C product manufacturing equipment, high-speed logistics and ropeless elevators. The permanent magnet linear synchronous motor made of permanent magnet materials with high magnetic energy product, high intrinsic coercive force and hard intrinsic characteristics further reduces the quality and control difficulty of the motor system, and can be used in vehicle-mounted mobile launch occasions.

[0003] The permanent magnet linear synchronous motor in the present invention is mainly used in high-speed and high-thrust applications. Since high-speed and high-thrust applications have strict size restrictions and high requirements on volume and weight, it is difficult to meet the requirements using traditional single-sided or double-sided linear motors. Summary of the invention

[0004] The present invention aims to solve the problem that traditional single-sided or double-sided linear motors are difficult to meet the size restrictions, volume and weight requirements of high-speed and high-thrust applications.

[0005] In view of the above problems, the technical solution adopted by the present invention is: a C-type winding long primary bilateral permanent magnet linear synchronous motor, comprising a C-type winding support, an I-shaped mover, a slide rail frame and a C-type primary winding fixedly arranged on the C-type winding support, wherein the C-type winding support comprises a left support and a right support of a C-type structure, the left support and the right support symmetrically arranged on the left and right have the same structure and a gap is provided in the middle thereof; the slide rail frame is mounted on the upper and lower ends of the C-type winding support, the slide rail frame comprises a left slide rail frame and a right slide rail frame, the left support The bottom and top of the component are both provided with left slide rail frames, and the bottom and top of the right support component are both provided with right slide rail frames, the left slide rail frame and the right slide rail frame are hollow tubular structures with left and right sides hollowed out, the middle part of the I-shaped mover is sleeved in the gap between the left support component and the right support component, and the top and bottom of the I-shaped mover are sleeved in the slide rail grooves formed by the hollowing of the left slide rail frame and the right slide rail frame; the C-type primary winding is a multi-phase winding, including an effective edge and end bending parts bent outward at both ends of the effective edge, and the effective edge is in contact with the middle part of the winding support component.

[0006] Furthermore, the I-shaped mover is made of permanent magnet material to provide driving excitation for the motor.

[0007] Furthermore, the C-type primary winding is a six-phase winding, including an A1 phase winding 10, a B1 phase winding 11, a C1 phase winding 12, an A2 phase winding 16, a B2 phase winding 17 and a C2 phase winding 18; wherein the A1 phase winding is 120° out of phase with the B1 phase and the C1 phase winding current, the A2 phase winding is 120° out of phase with the B2 phase and the C2 phase winding current, and the A1 and A2 phase winding currents are 30° out of phase with each other; in terms of spatial structure, the The effective side is fitted with the long side of the winding support 1, and is bent 90° in the same direction at the bending parts of its two ends. After it extends out 1 / 8 to 1 / 12 of the length of the effective side, it is bent 180° in the opposite direction in space, returns to the bending part of the winding support 1, and then is bent 90° again to return to the effective side of the winding with the same phase; this bending treatment can minimize the end length of the primary winding of the motor, thereby reducing the resistance and inductance of the motor winding and reducing the winding quality.

[0008] Furthermore, a plurality of structural support bars are arranged on the inner sides of the left support member and the right support member. After the stator winding is wound, it is glued to the left support member and the right support member by means of a glue material. The gap between the left support member and the right support member is the movement area of ​​the I-shaped mover, which provides a straight track for the movement of the secondary permanent magnet.

[0009] Furthermore, the I-shaped mover includes an intermediate beam and a conductive member. The intermediate beam includes four permanent magnets magnetized in different directions, which is a Halbach magnetization method. It moves in a track formed by a C-shaped winding support and a winding to provide an air gap magnetic field for excitation of the motor. The conductive member is embedded and fixed with the intermediate beam, and moves in a slide rail frame to connect the load and conduct the electromagnetic force generated by the motor.

[0010] Furthermore, the conductive part is made of Carvra aviation composite material.

[0011] Furthermore, the right slide rail frame includes a load-constrained slide rail and a mover motion groove frame; the mover motion groove frame is a hollow tubular structure with hollowed-out sides on the left and right sides (the top and bottom of the I-shaped mover are placed in the hollowed-out parts), the load-constrained slide rail provides track constraints for load movement, and the mover motion groove frame provides a groove cavity for the mover movement, playing a supporting role, and the left slide rail frame structure is the same as the right slide rail frame structure.

[0012] Furthermore, the load-constraining slide rail includes an upper constraint side strip arranged at the upper edge of the hollowed-out areas on the left and right sides of the mover motion slot frame and a lower constraint side strip arranged at the lower edge. Both the upper constraint side strip and the lower constraint side strip are T-shaped structures, and the top of the T-shaped structure serves to constrain the I-shaped mover.

[0013] Furthermore, a base connecting plate is fixedly provided on the slide rail frame. The base connecting plate is a solid alloy block, which connects the slide rail frame to the motor base to fix the motor and the slide rail.

[0014] The beneficial effects and features of the present invention are:

[0015] (1) The present invention provides a C-type permanent magnet linear synchronous motor with a long primary and a short secondary. The primary winding bending portion adopts a bending form, which reduces the end length, saves the end space, reduces the resistance and inductance of the motor winding, and improves the motor efficiency.

[0016] (2) The C-type permanent magnet linear synchronous motor of the present invention has a long primary and a short secondary. The motor has a compact structure, a small size and a small weight, and a high thrust density. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a short-stroke C-type permanent magnet linear motor of a preferred embodiment of the present invention;

[0018] Figure 2 It is a partial enlarged structural schematic diagram of a C-type primary winding of a preferred embodiment of the present invention;

[0019] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of ;

[0020] Figure 4 It is a schematic diagram of the overall structure of a C-type primary winding of a preferred embodiment of the present invention;

[0021] Figure 5 It is a structural schematic diagram of a C-type primary winding and an intermediate beam combination in a preferred embodiment of the present invention;

[0022] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure of ;

[0023] Figure 7 yes Figure 5 A schematic diagram of a top view structure;

[0024] Figure 8 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle I-shaped mover;

[0025] Fig. 9 yes Figure 1 Schematic diagram of the structure after the top surface of the middle slide rail frame is uncovered;

[0026] Fig.10 yes Figure 1 Schematic diagram of the longitudinal section structure;

[0027] Fig.11 This is a schematic structural diagram of an I-shaped mover of a preferred embodiment of the present invention;

[0028] Fig.12This is a schematic structural diagram of a C-type winding support member of a preferred embodiment of the present invention;

[0029] Fig.13 It is a structural schematic diagram of a slide rail frame of a preferred embodiment of the present invention;

[0030] Fig.14 2 is a two-dimensional electromagnetic thrust curve of a preferred embodiment of the present invention (the ordinate is thrust, the abscissa is time); DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figure 1-2 The present invention relates to an overall structure of a long primary and short secondary C-type permanent magnet linear motor, including a C-type winding support 1, an I-shaped mover 2, a slide rail frame 3, and a base connecting plate 4. The I-shaped mover is made of permanent magnet material, providing driving excitation for the motor, the slide rail frame 3 provides a sliding track for load movement, provides a straight track for the I-shaped mover 2, and is connected to the motor base through the base connecting plate 4 to play a role of fixed support, and the C-type winding support 1 provides a fixed component for the primary winding, playing a role of supporting the stator. The use of C-type winding reduces the end length of the motor winding, reduces the end loss of the motor, increases the transmission efficiency of the motor, and reduces the volume and mass of the motor.

[0033] Figure 3-Figure 7 The schematic diagram of the structure of the C-type primary winding is shown. The C-type primary winding includes A1 phase winding, B1 phase winding, C1 phase winding, A2 phase winding, B2 phase winding, and C2 phase winding; wherein, the effective side of each phase winding is in contact with the long side of the winding support 1, and the two ends are bent 90 degrees in the same direction. After extending 1 / 8 to 1 / 12 of the effective side, it is bent 180 degrees in space, and then bent 90 degrees again at the bend of the winding support 1 to return to the effective side of the same phase. This bending process can minimize the end length of the motor primary winding, thereby reducing the resistance and inductance of the motor winding and reducing the winding quality. The permanent magnet 14 is in the C-type winding, and there is an air gap 15 of 1-4 mm between it and the three-phase AC winding.

[0034] Figure 8-Figure 10 The overall structure of the motor was sectioned from different views.

[0035] Fig.11This is a schematic diagram of the I-shaped rotor structure of the motor. Its structure is I-shaped. On the middle beam of the rotor is the middle beam 2-1 with high magnetic energy product, high intrinsic coercive force and hard intrinsic characteristics. The middle beam 2-1 is mainly composed of four permanent magnets magnetized in different directions. It is a Halbach magnetization method. It moves in the track composed of C-shaped winding support and winding to provide the main excitation air gap magnetic field for the motor. The upper and lower conductive parts 2-2 of the rotor are composed of lightweight Kavla composite materials, which are embedded and fixed with the permanent magnet 2-1. They move in the slide rail frame to connect the load and conduct the electromagnetic force generated by the motor.

[0036] Please refer to Fig.12 The C-shaped winding support 1 includes a left support 1-1 and a right support 1-2, and a plurality of structural support bars 1-3 are arranged on the inner side thereof. After the stator winding is wound, it is glued to the left support 1-1 and the right support 1-2 by means of a glue material. The gap between the left support 1-1 and the right support 1-2 is the movement area of ​​the I-shaped mover 2, which provides a straight track for the movement of the secondary permanent magnet.

[0037] Please refer to Fig.13 The right slide rail frame 3-2 includes a load-constrained slide rail 3-4 and a movable motion groove frame 3-5; the movable motion groove frame 3-5 is a hollow tubular structure with two sides hollowed out, the load-constrained slide rail 3-4 provides track constraints for load movement, and the movable motion groove frame 3-2 provides a groove cavity for the movable component movement, which plays a supporting role. The structure of the left slide rail frame 3-1 is the same as that of the right slide rail frame 3-2, and the material is made of lightweight aviation material. It plays a connecting and supporting role.

[0038] Please refer to Fig.14 , Fig.14 This is an example calculation performed in this scheme. Fig.14 The steady-state electromagnetic thrust curve shows an average value of 21.12 kN, a maximum thrust of 21.36 kN, a minimum thrust of 20.83 kN, and a thrust fluctuation peak-to-peak value of approximately 0.53 kN, accounting for approximately 2.5% of the average value; this indicates that the thrust fluctuation of this scheme is small and has good thrust stability.

[0039] The present invention designs a C-type permanent magnet linear motor structure with a long width and short height, which has a specific application in high-speed and high-thrust applications. The use of C-type windings increases the effective side of the motor, increases the thrust per unit volume and weight of the motor, has a large thrust density, and can meet the corresponding space requirements.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the structural relationship and principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A C-type winding long primary double-sided permanent magnet linear synchronous motor, characterized in that : comprising a C-shaped winding support (1), an I-shaped mover (2), a slide rail frame (3) and a C-shaped primary winding (5) fixedly arranged on the C-shaped winding support, wherein the C-shaped winding support (1) comprises a left support (1-1) and a right support (1-2) of a C-shaped structure, the left support (1-1) and the right support (1-2) symmetrically arranged on the left and right have the same structure and a gap is provided in the middle thereof; the slide rail frame (3) is mounted on the upper and lower ends of the C-shaped winding support (1), the slide rail frame (3) comprises a left slide rail frame (3-1) and a right slide rail frame (3-2), the left support is provided with the left slide rail frame (3-1) at the bottom and the top, and the right support is provided with the left slide rail frame (3-1) at the bottom and the top. A right slide rail frame (3-2) is provided at the bottom and the top, the left slide rail frame (3-1) and the right slide rail frame (3-2) are hollow tubular structures with left and right sides hollowed out, the middle part of the I-shaped mover (2) is sleeved in the gap between the left support member (1-1) and the right support member (1-2), and the top and bottom of the I-shaped mover (2) are sleeved in the slide rail grooves hollowed out by the left slide rail frame (3-1) and the right slide rail frame (3-2); the C-shaped primary winding (5) is a multi-phase winding, comprising an effective edge (5-1) and an end bending portion (5-2) bent outward at both ends of the effective edge, and the effective edge (5-1) is in contact with the middle part of the winding support member (1); The I-shaped mover (2) is made of permanent magnet material and provides driving excitation for the motor; The right slide rail frame (3-2) comprises a load-constraining slide rail (3-4) and a mover motion slot frame (3-5); the mover motion slot frame (3-5) is a hollow tubular structure with left and right sides hollowed out, the load-constraining slide rail (3-4) provides track constraints for load movement, and the mover motion slot frame (3-5) provides a slot cavity for the mover movement, playing a supporting role, and the structure of the left slide rail frame (3-1) is the same as that of the right slide rail frame (3-2); The load-constraining slide rail (3-4) comprises an upper constraining side bar (3-4-1) arranged at the upper edge of the hollowed-out areas on the left and right sides of the mover motion slot frame (3-5) and a lower constraining side bar (3-4-2) arranged at the lower edge, the upper constraining side bar and the lower constraining side bar both being T-shaped structures, and the top of the T-shaped structure serves to constrain the I-shaped mover (2).

2. The C-type winding long primary double-sided permanent magnet linear synchronous motor according to claim 1, characterized in that The C-type primary winding (5) is a six-phase winding, including an A1 phase winding 10, a B1 phase winding 11, a C1 phase winding 12, an A2 phase winding 16, a B2 phase winding 17 and a C2 phase winding 18; wherein the current phases of the A1 phase winding, the B1 phase winding and the C1 phase winding are 120° different from each other, the current phases of the A2 phase winding, the B2 phase winding and the C2 phase winding are also 120° different from each other, and the currents of the A1 and A2 phase windings are 30° different from each other in phase; in terms of spatial structure, the effective side of each phase winding is 1 / 4 of the winding. The long sides of the winding support member 1 are fitted together, and the two end bending parts (5-2) are bent 90 degrees in the same direction. After it extends out to 1 / 8 to 1 / 12 of the effective side, it is bent 180 degrees in the opposite direction in space, returns to the bending part of the winding support member 1, and then is bent 90 degrees again to return to the effective side (5-1) of the same phase winding; this bending process can minimize the end length of the primary winding of the motor, thereby reducing the resistance and inductance of the motor winding and reducing the winding quality.

3. The C-type winding long primary double-sided permanent magnet linear synchronous motor according to claim 1, characterized in that : A plurality of structural support bars (1-3) are arranged on the inner sides of the left support member (1-1) and the right support member (1-2). After the stator winding is wound, it is glued to the left support member (1-1) and the right support member (1-2) by means of a glue material. The gap between the left support member (1-1) and the right support member (1-2) is the movement area of ​​the I-shaped mover (2), which provides a straight track for the movement of the secondary permanent magnet.

4. The C-type winding long primary double-sided permanent magnet linear synchronous motor according to claim 1, characterized in that: The I-shaped mover (2) comprises an intermediate beam (2-1) and a conducting member (2-2); the intermediate beam (2-1) comprises four permanent magnets magnetized in different directions in a Halbach magnetization manner, and moves in a track formed by a C-shaped winding support member and a winding to provide an air gap magnetic field for excitation of the motor; the conducting member (2-2) is embedded and fixed with the intermediate beam (2-1), and moves in a slide rail frame to connect a load and conduct the electromagnetic force generated by the motor.

5. The C-type winding long primary double-sided permanent magnet linear synchronous motor according to claim 4, characterized in that : The conductive part (2-2) is made of Carvra aviation composite material.

6. The C-type winding long primary double-sided permanent magnet linear synchronous motor according to claim 1, characterized in that The slide rail frame (3) is also fixedly provided with a base connecting plate (4), which is a solid alloy block, and connects the slide rail frame (3) to the motor base to fix the motor and the slide rail.

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