A linear motor driver capable of fixed-step speed measurement

Abstract

The utility model discloses a linear motor driver capable of fixed-step speed measurement, and relates to the technical field of linear motors. The utility model comprises a magnetic suspension outer track, on which a magnetic suspension moving rail assembly is movably arranged, on which a permanent magnet group is arranged, and the permanent magnet group comprises permanent magnet blocks arranged in an N and S staggered manner. A stator drive motor assembly, a Hall sensor array, and a central controller are arranged at a position directly above the position of the permanent magnet group on the magnetic suspension outer track, and the Hall sensor array comprises a plurality of Hall sensors arranged at equal intervals; the number of the Hall sensors is the length of a single permanent magnet block / fixed displacement interval+1. Under the premise of not relying on high-precision measuring elements such as grating rulers, the scheme can realize round-trip in-position control of the linear motor based on a limited number of Hall sensors, thereby improving in-position accuracy and running smoothness.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motors, in particular to a linear motor driver capable of measuring speed with a fixed step length. Background Art

[0002] With the continuous improvement of industrial automation and intelligence, the demand for accurate, stable and efficient linear motion control is increasing. As a device that can achieve direct linear motion, linear motors have been widely used in industrial automation, medical equipment, aerospace and other fields. In the field of linear motor technology, achieving accurate and stable speed measurement and positioning control has always been the focus of research. Traditional linear motor speed measurement methods often rely on high-precision measuring elements such as grating rulers. Although these elements can provide high measurement accuracy, they are expensive, complex to install, and easily affected by environmental factors, resulting in reduced measurement accuracy. In addition, traditional linear motors also have certain limitations in speed control. Due to the complexity of the internal structure of the motor and the influence of external interference factors, the speed of the linear motor is often difficult to achieve precise control, resulting in unstable motion trajectory and low positioning accuracy. Therefore, how to design a linear motor that can achieve accurate speed measurement and positioning control has become a hot spot and difficulty in current research. Utility Model Content

[0003] The purpose of this utility model is to overcome the problems existing in the prior art and provide a linear motor driver capable of fixed-step speed measurement. This product uses the Hall effect principle to achieve real-time monitoring and precise control of the motion state of the linear motor by cleverly designing the arrangement of the permanent magnet group and the Hall sensor array. This new measurement technology not only has the advantages of high measurement accuracy and fast response speed, but also can adapt to the application requirements under various complex environmental conditions, providing more reliable technical support for the application of linear motors in industrial automation, medical equipment, aerospace and other fields.

[0004] The utility model is realized by the following technical scheme: a linear motor driver capable of fixed step-length speed measurement, comprising a magnetic suspension outer track, a magnetic suspension moving rail assembly movably arranged on the magnetic suspension outer track, a permanent magnet group arranged on the magnetic suspension moving rail assembly, the permanent magnet group comprising permanent magnet blocks arranged in an N and S staggered manner, a stator drive motor assembly, a Hall sensor array, and a central controller arranged at a position directly above the position of the permanent magnet group on the magnetic suspension outer track, the Hall sensor array comprising a plurality of Hall sensors arranged at equal intervals; the number of the Hall sensors is the length of a single permanent magnet block / fixed displacement interval+1.

[0005] In order to further optimize the utility model, the following technical solutions can be preferably used:

[0006] Preferably, the magnetic suspension moving rail assembly moves laterally along the magnetic suspension outer rail, load-bearing pulley blocks are arranged on both sides of the magnetic suspension moving rail assembly, and a slide groove cooperating with the load-bearing pulley block is arranged on the magnetic suspension outer rail.

[0007] Preferably, the magnetic levitation moving rail assembly includes a moving rail body, a fixed iron plate is arranged at the installation position of the moving rail body corresponding to the position of the permanent magnet group, a first slot is opened at the top of the moving rail body along the length direction, the fixed iron plate is arranged in the first slot, and the permanent magnet group is adsorbed on the outer surface of the fixed iron plate.

[0008] Preferably, the magnetic levitation outer track includes a plurality of unit track bodies spliced ​​to each other, and the unit track body includes a left shell and a right shell spliced ​​to each other.

[0009] Preferably, the stator drive motor assembly includes a stator frame, a silicon steel sheet assembly, and a coil assembly. The stator frame is provided with an installation groove for installing a central controller, a Hall sensor and a silicon steel sheet assembly. The silicon steel sheet assembly is arranged in the installation groove. The silicon steel sheet assembly is evenly provided with installation teeth along the lateral movement direction of the moving body, and the coil assembly is sequentially mounted on the installation teeth.

[0010] Preferably, the coil assembly comprises a coil frame on which a coil is wound; both ends of the stator frame are provided with mutually matching slots and protrusions, and two adjacent stator frames are spliced ​​with each other through the slots and protrusions.

[0011] The beneficial effects of the utility model are mainly reflected in the following aspects:

[0012] The utility model of the linear motor with fixed step speed measurement has brought significant beneficial effects in the field of linear motor technology. First, by adopting the design of magnetic suspension outer track and magnetic suspension moving track assembly, the linear motor realizes high-precision and stable motion control. The application of magnetic suspension technology effectively reduces friction and resistance, and improves the motion efficiency and response speed of the motor. At the same time, the staggered arrangement of N and S of the permanent magnet group enables the motor to generate a stable magnetic field during the movement, further enhancing the stability and reliability of the motor. Secondly, the utility model realizes the accurate measurement of the speed of the linear motor by introducing the Hall sensor array. The equal-interval arrangement of the Hall sensor array and the accurate calculation of the number ensure that the sensor can accurately capture the motion state of the permanent magnet group, thereby realizing real-time monitoring and precise control of the motor speed. This measurement method not only improves the measurement accuracy, but also reduces the dependence on high-precision measurement elements and reduces the production cost. In addition, based on the design of a limited number of Hall sensors, the linear motor realizes round-trip in-place control, improves the in-place accuracy and running smoothness. Through the intelligent processing of the central controller, the motor can be accurately adjusted according to the feedback signal of the sensor to ensure the accuracy and stability of the motion trajectory. This control method not only improves the motor's motion performance, but also enhances the safety and reliability of the system. In summary, the utility model of the linear motor capable of fixed-step speed measurement has significant advantages in terms of stability, measurement accuracy, motion efficiency, and cost control, and provides strong technical support for the application of linear motors in industrial automation, medical equipment, aerospace, and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall structural layout diagram of the linear motor capable of fixed-step speed measurement in Example 1;

[0014] Figure 2 A side view of the internal structure of the linear motor driver in Example 1;

[0015] Figure 3 Schematic diagram of the overall structure of the linear motor in Example 1;

[0016] Figure 4 Schematic diagram of the overall structure of the silicon steel sheet assembly in Example 1;

[0017] Figure 5 Schematic diagram of the structure of the silicon steel sheet in Example 1;

[0018] Figure 6 It is a structural schematic diagram of the magnetic suspension moving rail assembly in Example 1;

[0019] Figure 7 This is an enlarged schematic diagram of the structure at A;

[0020] in:

[0021] 1-linear motor drive; 2-moving body composition; 3-suspension frame; 4-moving parts; 5-magnetic levitation outer track; 6-stator drive motor assembly; 7-magnetic levitation moving rail assembly; 8-slideway; 9-load-bearing pulley block; 10-stator frame; 11-silicon steel sheet assembly; 12-coil assembly; 13-Hall sensor; 14-silicon steel sheet unit; 15-coil frame; 16-mounting teeth; 17-arch area; 18-dovetail groove; 19-dovetail protrusion; 20-silicon steel sheet; 21-moving rail body; 22-permanent magnet group, 23-fixed iron plate, 24-first slot, 25-permanent magnet block, 26-second slot, 27-fixed plate, 28-pulley, 29-ferromagnetic metal sealing plate; 30-central controller. DETAILED DESCRIPTION

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] like Figure 1-7As shown, a linear motor driver 1 capable of fixed-step speed measurement comprises a magnetic suspension outer track 5, a magnetic suspension moving track assembly 7 is movably mounted on the magnetic suspension outer track 5, a permanent magnet group is mounted on the magnetic suspension moving track assembly 7, wherein the permanent magnet group comprises permanent magnet blocks arranged in an N and S staggered manner, a stator drive motor assembly 6, a Hall sensor array, and a central controller 30 are mounted on the magnetic suspension outer track at a position corresponding to the position of the permanent magnet group, and the Hall sensor array comprises a plurality of Hall sensors 13 arranged at equal intervals; the number of Hall sensors 13 is the length of a single permanent magnet block / fixed displacement interval+1, for example, the permanent magnet group 22 is composed of a plurality of permanent magnet blocks 25. Assuming that the displacement interval for speed measurement is D, and the length of a single permanent magnet block 25 is L, the number of Hall sensors 13 that the Hall sensor array should include is L / D+1. The central controller adopts an ARM series chip LPC2138 as a digital controller of the central processing unit; by cleverly designing the arrangement of the permanent magnet group and the Hall sensor array, the Hall effect principle is used to realize real-time monitoring and precise control of the motion state of the linear motor.

[0026] The magnetic suspension moving rail assembly moves laterally along the magnetic suspension outer rail, and load-bearing pulley blocks 9 are installed on both sides of the magnetic suspension moving rail assembly. A slide groove 8 that cooperates with the load-bearing pulley block is installed on the magnetic suspension outer rail. The moving body assembly is installed at the bottom of the magnetic suspension moving rail assembly, and a permanent magnet group 22 is installed at the middle position of the upper part of the magnetic suspension moving rail assembly. The bottom of the magnetic suspension moving rail assembly is connected to the moving body assembly 2, and the moving body assembly is driven by the lateral thrust generated by the linear motor to perform linear motion to complete the opening / closing action of the moving body; wherein the moving body assembly 2 includes a suspension frame 3 connected to the magnetic suspension moving rail assembly, and a moving component 4 is installed on the suspension frame, and the moving component 4 is one of a door, a window, a curtain, and a curtain. The specific form of the suspension frame is designed according to the object of the moving component.

[0027] The magnetic suspension moving rail assembly moves horizontally continuously under the drive of the stator drive electronic assembly 6; the use of multiple series-connected stator drive electronic assemblies for continuous long-distance drive can be applicable to the reciprocating motion of a large-span moving body, and the vibration and noise during the transmission process are low; wherein the stator drive motor assembly 6 includes a stator frame 10, a silicon steel sheet assembly 11, a coil assembly 12, and a Hall sensor 13, wherein the stator frame 10 is provided with an installation groove for installing the Hall sensor and the silicon steel sheet assembly, the silicon steel sheet assembly is installed in the installation groove, and the silicon steel sheet assembly is evenly distributed with installation teeth 16 along the lateral movement direction of the installation moving body, and the coil assembly is sequentially sleeved on the installation teeth 16; the coil assembly includes a coil frame 15, on which a coil is wound ; The silicon steel sheet assembly 11 includes a plurality of silicon steel sheet units 14 spliced ​​together, and dovetail grooves 18 and dovetail protrusions 19 are respectively installed at both ends of two adjacent silicon steel sheet units 14; the silicon steel sheet unit includes a plurality of silicon steel sheets 20 stacked on each other, and the silicon steel sheets 20 are in an E shape, and a plurality of arched areas 17 for easy stacking are installed on the plate surface of the silicon steel sheet, and the arched areas are bent using the material of the silicon steel sheet itself, and the silicon steel sheet assembly with a special splicing design is convenient for installation and subsequent maintenance and replacement; wherein the two ends of the stator frame are provided with mutually matching slots 30 and protrusions 31, and the two adjacent stator frames are spliced ​​with each other through the slots and protrusions, so as to facilitate the splicing of a suitable number of stator drive motor components according to the driving distance.

[0028] The magnetic suspension moving rail assembly includes a moving rail body 21, wherein the moving rail body adopts an integrally formed hollow aluminum profile, which is convenient for the forming of the moving rail body, and at the same time, due to the material characteristics, it is light in weight and high in strength. A fixed iron plate 23 is installed on the moving rail body corresponding to the position of the permanent magnet group 22, a first slot 24 is opened on the top of the moving rail body along the length direction, the fixed iron plate is installed in the first slot, the permanent magnet group is adsorbed and installed on the outer surface of the fixed iron plate, and the permanent magnet group includes permanent magnet blocks 25 arranged in an N and S staggered manner, which cooperate with the external changing magnetic field to realize the movement of the moving rail body; the magnet sheet is fixed by a specific fixed iron plate, which is convenient for installation and maintenance. A second slot 26 for installing a load-bearing pulley group is opened on both sides of the moving rail body along the length direction, and the load-bearing pulley group includes a fixed plate 27 embedded in the slot, and a pulley 28 is rotatably installed on the outer wall of the fixed plate. A ferromagnetic metal sealing plate is installed at the other end of the outer side of the moving rail body 21. The ferromagnetic metal sealing plate 29 is used to cooperate with the external magnet to position the moving rail body to prevent it from being shaken by slight external force. In this embodiment, the first slot and the second slot are both T-shaped through slots. In this technical solution, each part of the moving rail body is installed using specific slots combined with bolts, ensuring that each part is easy to disassemble and maintain, and the overall structure has high stability.

[0029] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear motor driver capable of fixed step-length speed measurement, characterized in that: It comprises a magnetic levitation outer track, on which a magnetic levitation moving rail assembly is movably arranged, on which a permanent magnet group is arranged, and the permanent magnet group comprises permanent magnet blocks arranged in an N and S staggered manner, and a stator drive motor assembly, a Hall sensor array, and a central controller are arranged at a position directly above the position of the permanent magnet group on the magnetic levitation outer track, and the Hall sensor array comprises a plurality of Hall sensors arranged at equal intervals; the number of the Hall sensors is the length of a single permanent magnet block / fixed displacement interval+1.

2. A linear motor driver capable of fixed step-length speed measurement according to claim 1, characterized in that: The magnetic suspension moving rail assembly moves laterally along the magnetic suspension outer rail, and load-bearing pulley blocks are arranged on both sides of the magnetic suspension moving rail assembly. The magnetic suspension outer rail is provided with a slide groove matched with the load-bearing pulley block.

3. The linear motor driver capable of fixed-step speed measurement according to claim 1, characterized in that: The magnetic levitation moving rail assembly includes a moving rail body, a fixed iron plate is arranged at the installation position of the moving rail body corresponding to the position of the permanent magnet group, a first slot is opened at the top of the moving rail body along the length direction, the fixed iron plate is arranged in the first slot, and the permanent magnet group is adsorbed and arranged on the outer surface of the fixed iron plate.

4. The linear motor driver capable of fixed-step speed measurement according to claim 1, characterized in that: The magnetic suspension outer track includes a plurality of unit track bodies spliced ​​to each other, and the unit track body includes a left shell and a right shell spliced ​​to each other.

5. The linear motor driver capable of fixed-step speed measurement according to claim 1, characterized in that: The stator drive motor assembly includes a stator frame, a silicon steel sheet assembly, and a coil assembly. The stator frame is provided with an installation groove for installing a central controller, a Hall sensor and a silicon steel sheet assembly. The silicon steel sheet assembly is arranged in the installation groove. The silicon steel sheet assembly is evenly provided with installation teeth along the lateral movement direction of the moving body, and the coil assembly is sequentially sleeved on the installation teeth.

6. The linear motor driver capable of fixed-step speed measurement according to claim 5, characterized in that: The coil assembly comprises a coil frame on which a coil is wound; both ends of the stator frame are provided with mutually matching slots and protrusions, and two adjacent stator frames are spliced ​​with each other through the slots and protrusions.

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