Heavy load linear motor stator and linear motor system

Abstract

The utility model belongs to linear motor field, concretely relates to a kind of heavy load linear motor stator and linear motor system. Heavy load linear motor stator includes installation frame, drive plate, control panel, encoding induction plate and drive coil assembly;The installation frame includes installation positioning frame, and the installation positioning frame includes drive plate installation cavity, control panel installation cavity, drive coil installation cavity and encoding induction plate installation cavity;The drive plate is fixedly arranged in the drive plate installation cavity, the control panel is fixedly arranged in the control panel installation cavity, the drive coil assembly is arranged in the drive coil installation cavity, and the encoding induction plate is fixedly arranged in the encoding induction plate installation cavity.The utility model is the heavy load linear motor stator and linear motor system of high integration and internal layout optimization designed for heavy load working condition.

Description

Technical Field

[0001] This utility model belongs to the field of linear motors, specifically relating to a heavy-duty linear motor stator and linear motor system. Background Technology

[0002] Linear motors are core drive components in modern high-end equipment and automation systems, and their performance directly determines the equipment's precision, speed, and reliability. In heavy-duty applications, such as large CNC machine tools, heavy-duty handling, and pressure processing, linear motors are required to continuously output enormous thrust and withstand harsh operating conditions. Traditional linear motor stator structures are often designed for medium to light loads, and when directly applied to heavy-duty applications, they face severe challenges in terms of heat dissipation, mechanical rigidity, and anti-interference capabilities.

[0003] Currently, the common technical means to achieve high thrust output is to simply increase the size of the motor or use multiple motors in parallel, but this results in bulky equipment and high costs. However, this enhancement does not systematically solve the internal problems caused by heavy-load operation: First, if the large amount of heat generated by the drive coil and power devices cannot be dissipated in time, it will cause high-temperature demagnetization or electronic component failure; second, strong electromagnetic attraction and impact vibration can easily cause stator structure deformation or loosening of internal components, compromising the critical air gap accuracy; third, improper layout of power lines and sensitive signal control lines can cause serious electromagnetic interference, leading to control inaccuracies.

[0004] Therefore, the existing linear motor stator structure still has some problems when facing the comprehensive requirements of high power density, high structural rigidity, excellent heat dissipation, and high reliability in heavy-duty applications. Thus, developing a highly integrated linear motor stator with optimized internal layout specifically designed for heavy-duty conditions has become an urgent need to improve the performance of high-end equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a heavy-duty linear motor stator and linear motor system that is highly integrated and has an optimized internal layout, designed for heavy-duty working conditions.

[0006] This utility model discloses a heavy-duty linear motor stator, comprising a mounting frame, a drive board, a control board, an encoder induction board, and a drive coil assembly; The mounting frame includes a mounting positioning frame, which includes two opposing side plates and a partition connecting plate connecting the two side plates. The partition connecting plate divides the space between the two side plates into an upper cavity and a lower cavity. Partition plates are provided on both sides of the partition connecting plate. The partition plate of the upper cavity divides the upper cavity into a drive board mounting cavity and a control board mounting cavity. The partition plate of the lower cavity divides the lower cavity into a drive coil mounting cavity and an encoding induction board mounting cavity. The drive board is fixedly disposed in the drive board mounting cavity, the control board is fixedly disposed in the control board mounting cavity, the drive coil assembly is disposed in the drive coil mounting cavity, and the encoding sensing board is fixedly disposed in the encoding sensing board mounting cavity.

[0007] Furthermore, the drive coil mounting cavity is provided with a first through hole that passes through the partition connecting plate and connects the drive board mounting cavity and / or the control board mounting cavity. The drive coil assembly is electrically connected to the drive board and / or the control board through the first through hole. The partition plate of the upper cavity is provided with a second through hole that connects the drive board mounting cavity and the control board mounting cavity, and the drive board and the control board are electrically connected through the second through hole; The partition connecting plate is provided with a third through hole that connects the control board mounting cavity and the encoding sensor board mounting cavity, and the control board and the encoding sensor board are electrically connected through the third through hole.

[0008] Furthermore, the mounting frame also includes a front fixing plate disposed at the front end of the two side plates, a rear fixing plate disposed at the rear end of the two side plates, an upper fixing plate disposed at the upper end of the two side plates, and a lower fixing plate disposed at the lower end of the two side plates. The front and / or rear mounting plates are used to bring out power lines, signal lines, and test lines.

[0009] Furthermore, the front fixing plate, rear fixing plate, upper fixing plate, lower fixing plate, and two side plates together form a rectangular cavity; The rectangular cavity is filled with epoxy resin.

[0010] Furthermore, the void portion of the rectangular cavity is filled with a filler block; The epoxy resin is used for potting after filling the filler block.

[0011] Furthermore, heat dissipation structures are provided on the outer sides of the two side panels.

[0012] Furthermore, it also includes an internal braking resistor; The drive board has an internal braking resistor positive lead, a DC bus positive lead, and a common terminal line for the braking circuit. The internal braking resistor is connected to the positive lead of the internal braking resistor. It also includes a control switch that controls the on / off state of the positive lead of the internal braking resistor and the common terminal of the braking circuit. The positive lead of the DC bus and the common terminal of the braking circuit can be used to connect and disconnect the external braking resistor, and the internal braking resistor and the external braking resistor can be selected to work. Furthermore, the drive board also includes a DC bus negative wire; The positive and negative DC bus lines are connected in parallel with capacitor lines, braking resistor control lines, and three-phase inverter bridges. A capacitor is provided on the capacitor line; A diode and a switching element are sequentially arranged on the braking resistor control line, and the common terminal line of the braking circuit is led out from the braking resistor control line. The three-phase inverter bridge connects to the drive coil assembly of the linear motor.

[0013] Furthermore, the internal braking resistor is fitted into the side plate inside the drive plate mounting cavity.

[0014] The present invention also provides a linear motor system, including the above-mentioned heavy-duty linear motor stator, and further including a mover disposed on the heavy-duty linear motor stator.

[0015] The beneficial effects of this invention are that the heavy-duty linear motor stator provided by this invention physically isolates the drive board (high-power, high-frequency switching components) from the control board (low-voltage, sensitive signal processing components) within the drive board mounting cavity and the control board mounting cavity through a partition plate. Furthermore, it isolates the power components, drive coil components, and sensing components, i.e., the encoder induction board, within the drive coil mounting cavity and the encoder induction board mounting cavity, effectively avoiding interference from the strong electromagnetic field of the power circuit on the weak electrical control signal. This ensures the accuracy and stability of the position feedback signal, thereby improving the control precision and operational reliability of the motor.

[0016] Furthermore, this structure allows for optimization of the thermal characteristics of different heat-generating components. The drive board and drive coil assembly, as the main heat sources, are placed in separate chambers, preventing heat accumulation. Simultaneously, when the mounting frame is made of a thermally conductive material, the frame itself acts as a heat sink, rapidly conducting and dissipating heat. This significantly improves heat dissipation efficiency under heavy-load conditions, ensuring the motor's continuous output capability.

[0017] Furthermore, the mounting and positioning frame employs a structure combining side plates and partition connecting plates, forming a robust box-type or frame-type integral structure with extremely high mechanical rigidity and strength. This ensures that the stator body is not easily deformed under the enormous magnetic attraction and inertial impact brought about by heavy loads and high-speed operation. The drive coil assembly is firmly constrained within the drive coil mounting cavity, effectively suppressing vibrations during operation and providing a stable and uniform air gap magnetic field for the mover, thus guaranteeing the dynamic performance and service life of the motor. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the active linear motor stator of this utility model; Appendix Figure 2 This is a first-angle exploded view of the stator of the active linear motor in this utility model; Appendix Figure 3 This is a second-angle exploded view of the stator of the active linear motor in this utility model; Appendix Figure 4 This is a schematic diagram of the first angle structure of the mounting positioning frame in this utility model; Appendix Figure 5 This is a schematic diagram of the second angle structure of the mounting and positioning frame in this utility model; Appendix Figure 6 This is a schematic diagram of the structure of the active linear motor stator and the track in this utility model when they are not fixed. Appendix Figure 7 This is a front view of the active linear motor in this utility model when the stator and track are not fixed. Appendix Figure 8 This is a schematic diagram of the structure of the active linear motor stator fixed to the track in this utility model; Appendix Figure 9 This is a front view of the active linear motor stator fixed to the track in this utility model; Appendix Figure 10 This is a wiring diagram of the internal braking resistor in this utility model.

[0019] In the diagram, 100 - active linear motor stator; 200 - track; 300 - passive linear motor mover; 1 - mounting frame; 101 - mounting positioning frame; 1011 - side plate; 1012 - partition connecting plate; 1013 - upper cavity; 1014 - lower cavity; 1015 - partition plate; 1016 - drive board mounting cavity; 1017 - control board mounting cavity; 1018 - drive coil mounting cavity; 1019 - encoder induction board mounting cavity; 10110 - first wire hole; 10111 - second wire hole; 10112 - third wire hole; 102 - front fixing plate; 103 - rear fixing plate; 104 - upper fixing plate; 1 05-Lower fixed plate; 2-Drive board; 201-Internal braking resistor positive lead; 202-DC bus positive line; 203-Bracing circuit common terminal line; 204-DC bus negative line; 205-Capacitor line; 206-Bracing resistor control line; 207-Three-phase inverter bridge; 208-Capacitor; 209-Diode; 2010-Switching element; 3-Control board; 4-Encoding induction board; 5-Drive coil assembly; 6-Power line; 7-Signal line; 8-Test line; 9-Filling block; 10-Internal braking resistor; 11-External braking resistor; 12-Encoding board; 13-Guide rail; 14-Slider; 15-Epoxy resin. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0025] As attached Figure 1 -Appendix Figure 10 As shown, this utility model provides a heavy-duty linear motor stator, including a mounting frame 1, a drive board 2, a control board 3, an encoder induction board 4, and a drive coil assembly 5; The mounting frame 1 includes a mounting positioning frame 101, which includes two opposing side plates 1011 and a partition connecting plate 1012 connecting the two side plates 1011. The partition connecting plate 1012 divides the space between the two side plates 1011 into an upper cavity 1013 and a lower cavity 1014. Partition plates 1015 are provided on both sides of the partition connecting plate 1012. The partition plate 1015 of the upper cavity 1013 divides the upper cavity 1013 into a drive board mounting cavity 1016 and a control board mounting cavity 1017. The partition plate 1015 of the lower cavity 1014 divides the lower cavity 1014 into a drive coil mounting cavity 1018 and an encoding induction board mounting cavity 1019. The drive board 2 is fixedly disposed in the drive board mounting cavity 1016, the control board 3 is fixedly disposed in the control board mounting cavity 1017, the drive coil assembly 5 is disposed in the drive coil mounting cavity 1018, and the encoding sensing board 4 is fixedly disposed in the encoding sensing board mounting cavity 1019.

[0026] The heavy-duty linear motor stator provided by this invention physically isolates the drive board 2 (high-power, high-frequency switching component) from the control board 3 (low-voltage, sensitive signal processing component) in the drive board mounting cavity 1016 and the control board mounting cavity 1017 via 1015. Furthermore, it isolates the power components, drive coil assembly 5, and sensing components, i.e., the encoder sensing board 4, in the drive coil mounting cavity 1018 and the encoder sensing board mounting cavity 1019, effectively preventing interference from the strong electromagnetic field of the power circuit on the weak electrical control signal. This ensures the accuracy and stability of the position feedback signal, thereby improving the motor's control precision and operational reliability.

[0027] Furthermore, this structure allows for optimization of the thermal characteristics of different heat-generating components. The drive plate 2 and drive coil assembly 5, as the main heat sources, are placed in separate chambers, preventing heat accumulation. Simultaneously, when the mounting frame 1 is made of a thermally conductive material, it can act as a heat sink, rapidly conducting and dissipating heat. This significantly improves heat dissipation efficiency under heavy-load conditions, ensuring the motor's continuous output capability.

[0028] Furthermore, the mounting and positioning frame 101 adopts a structure combining side plates 1011 and partition connecting plates 1012, forming a robust box-type or frame-type integral structure with extremely high mechanical rigidity and strength. This ensures that the stator body is not easily deformed under the enormous magnetic attraction and inertial impact brought about by heavy loads and high-speed operation. The drive coil assembly 5 is firmly constrained within the drive coil mounting cavity 1018, which can effectively suppress vibration during operation, provide a stable and uniform air gap magnetic field for the mover, and guarantee the dynamic performance and service life of the motor.

[0029] In one embodiment, the drive coil mounting cavity 1018 is provided with a first through hole 10110 that passes through the partition connecting plate 1012 and connects the drive plate mounting cavity 1016 and / or the control plate mounting cavity 1017. The drive coil assembly 5 is electrically connected to the drive plate 2 and / or the control plate 3 through the first through hole 10110. The partition plate 1015 of the upper cavity 1013 is provided with a second through hole 10111 that connects the drive board mounting cavity 1016 and the control board mounting cavity 1017. The drive board 2 and the control board 3 are electrically connected through the second through hole 10111. Preferably, the second through hole 10111 adopts a strip hole or strip groove structure, and the drive board 2 and the control board 3 are connected by a ribbon cable. The separating connecting plate 1012 is provided with a third wiring hole 10112 that connects the control board mounting cavity 1017 and the encoding sensor plate mounting cavity 1019. The control board 3 and the encoding sensor plate 4 are electrically connected through the third wiring hole 10112. Preferably, the third wiring hole 10112 adopts a strip hole or strip groove structure, and the control board 3 and the encoding sensor plate 4 are connected by a ribbon cable.

[0030] In this embodiment, the first through-hole 10110, the second through-hole 10111, and the third through-hole 10112 provide the shortest and most direct physical path for the connection cables between the four modules: the drive board 2, the control board 3, the drive coil assembly 5, and the encoding induction board 4. This reduces the length of internal cables, lowers line resistance and voltage loss, and minimizes the chance that the wires might act as antennas to receive or transmit electromagnetic interference.

[0031] In one embodiment, the mounting frame 1 further includes a front fixing plate 102 disposed at the front end of the two side plates 1011, a rear fixing plate 103 disposed at the rear end of the two side plates 1011, an upper fixing plate 104 disposed at the upper end of the two side plates 1011, and a lower fixing plate 105 disposed at the lower end of the two side plates 1011. The front fixing plate 102 and / or the rear fixing plate 103 are used to lead out the power line 6, signal line 7 and test line 8.

[0032] In this embodiment, the front fixing plate 102, rear fixing plate 103, upper fixing plate 104, lower fixing plate 105, and two side plates 1011 together constitute a high-rigidity closed box structure. At this time, the partition connecting plate 1012 can significantly improve the structural strength of the closed box structure. In particular, the upper fixing plate 104, lower fixing plate 105, and partition connecting plate 1012 jointly improve the structural strength of the two side plates 1011. When the two partition plates 1015 abut against the upper fixing plate 104 and lower fixing plate 105 respectively, the two partition plates 1015 and the two side plates 1011 support the upper fixing plate 104 and lower fixing plate 105, thereby improving the structural strength of the upper fixing plate 104 and lower fixing plate 105.

[0033] This structure can greatly resist the huge magnetic attraction force, inertial force caused by acceleration and potential external impact force generated during heavy-load operation, effectively prevent the stator body from deforming, provide a stable and accurate mounting reference for the drive coil assembly 5 and the circuit board, and ensure the accuracy and reliability of the motor during long-term operation.

[0034] Preferably, the front fixing plate 102, the rear fixing plate 103, the upper fixing plate 104, and the lower fixing plate 105 are fastened to the contact portion of the mounting positioning frame 101 by fasteners.

[0035] In one embodiment, the front fixing plate 102, the rear fixing plate 103, the upper fixing plate 104, the lower fixing plate 105, and the two side plates 1011 enclose a rectangular cavity. The rectangular cavity is filled with epoxy resin 15.

[0036] In this embodiment, epoxy resin 15 has good thermal conductivity. After potting, it can efficiently and evenly conduct the heat generated by the main heat sources such as the drive board 2 and drive coil assembly 5 to the entire mounting frame 1, making it a whole heat sink. This greatly improves the heat dissipation conditions of the internal components, significantly reduces the hot spot temperature, allows the motor to operate continuously at higher power without overheating, and directly improves the motor's load capacity and overload potential.

[0037] Meanwhile, after the epoxy resin 15 has cured, it firmly bonds all the internal independent components into a complete rigid whole. This completely eliminates the possibility of tiny gaps and loosening between components, enabling the stator to withstand the huge impact and vibration brought about by extreme heavy loads and high-frequency start-stop, effectively preventing fatigue fracture of internal solder joints and component displacement, and greatly improving the mechanical reliability and lifespan of the product under harsh working conditions.

[0038] In one embodiment, the void portion of the rectangular cavity is filled with a filler block 9.

[0039] In this embodiment, by pre-filling the large-area voids of the rectangular cavity with filler blocks 9 before potting with epoxy resin 15, the amount of epoxy resin 15 used can be reduced, thus lowering costs. The filler blocks 9 themselves can provide support and, together with the potting compound, suppress minor vibrations of internal components.

[0040] In one embodiment, a heat dissipation structure is provided on the outer side of the two side plates 1011.

[0041] This embodiment significantly increases the contact area between the stator and the surrounding air by providing heat dissipation structures, such as heat dissipation fins, toothed structures, or corrugated structures, on the outer sides of the two side plates 1011. Through natural convection or forced air cooling, the heat generated internally can be conducted to the side plates 1011 via the mounting frame 1 and epoxy resin 15 and dissipated into the environment more quickly, thereby directly and effectively reducing the operating temperature of the core components.

[0042] In one embodiment, an internal braking resistor 10 is also included; The drive board 2 has an internal braking resistor positive lead 201, a DC bus positive lead 202 and a braking circuit common terminal 203. The internal braking resistor 10 is connected to the positive lead 201 of the internal braking resistor; It also includes a control switch that controls the on / off state of the positive lead 201 of the internal braking resistor and the common terminal 203 of the braking circuit. The DC bus positive lead 202 and the common terminal 203 of the braking circuit can be used to connect and disconnect the external braking resistor 11, and the internal braking resistor 10 and the external braking resistor 11 can be operated selectively.

[0043] In this embodiment, the internal braking resistor 10 is integrated inside the linear motor stator, which greatly optimizes the overall structure of the equipment and reduces the need for additional installation space. This makes the linear motor module more compact and more integrated, making it particularly suitable for space-constrained automation equipment applications.

[0044] By selecting between the internal braking resistor 10 and the external braking resistor 11, users can flexibly configure the braking capacity according to actual application needs. Under normal or low-to-medium power braking requirements, the built-in resistor can be used, simplifying the system; when encountering scenarios requiring stronger braking power, such as high inertia or high load, the system can be easily switched to the external high-power resistor without changing the motor design, thus achieving on-demand configuration of braking capacity.

[0045] For low-power braking applications, users do not need to perform complex wiring for the braking circuit every time. In most cases, using built-in resistors eliminates the need for external connections, reduces installation complexity, decreases the probability of wiring errors, and improves the efficiency of equipment assembly and maintenance. In one embodiment, the drive board 2 further includes a DC bus negative line 204; The DC bus positive line 202 and DC bus negative line 204 are connected in parallel with capacitor line 205, braking resistor control line 206 and three-phase inverter bridge 207. A capacitor 208 is provided on the capacitor line 205; A diode 209 and a switching element 2010 are sequentially arranged on the braking resistor control line 206, and the common terminal line 203 of the braking circuit is led out from the braking resistor control line 206. The three-phase inverter bridge 207 is connected to the drive coil assembly 5 of the linear motor.

[0046] In this embodiment, capacitor 208 is connected in parallel with the DC bus, which can quickly absorb the instantaneous regenerative energy generated by the motor during braking and effectively suppress the spike impact of the DC bus voltage. By controlling the on and off of the switching element 2010, excess energy can be precisely guided to the internal braking resistor 10 or the external braking resistor 11 for consumption, thereby stabilizing the bus voltage within a safe range and protecting the subsequent three-phase inverter bridge 207 and the entire drive system.

[0047] Integrating the braking resistor control line 206, diode 209, and switching element 2010 onto the driver board 2 results in an extremely short path between the braking control circuit and the power circuit, improving the timeliness of the braking response. The addition of diode 209 ensures that the current can only flow unidirectionally to the braking resistor, effectively preventing current backflow that may occur under complex operating conditions, avoiding damage to the switching element 2010, and greatly enhancing the reliability of the circuit.

[0048] In one embodiment, the internal braking resistor 10 is disposed in conjunction with the side plate 1011 within the drive plate mounting cavity 1016.

[0049] In this embodiment, by attaching the internal braking resistor 10 to the side plate 1011 inside the drive board mounting cavity 1016, the large heat capacity and surface area of ​​the side plate 1011 can be used to conduct out the large amount of heat generated by the internal braking resistor 10 when consuming braking energy. This avoids the accumulation of heat in the drive board mounting cavity 1016, effectively preventing the high temperature of the braking resistor from affecting the reliability of other precision electronic components on the drive board 2, and ensuring that the braking function can be used frequently without failure.

[0050] This utility model also provides a linear motor system, including the above-mentioned heavy-duty linear motor stator, and also including a mover disposed on the heavy-duty linear motor stator.

[0051] This utility model also provides a distributed linear module, including a track 200, a plurality of active linear motor stators 100 arranged at equal intervals along the track 200, and a passive linear motor mover 300 slidably disposed on the track 200 and cooperating with the plurality of active linear motor stators 100; wherein the active linear motor stators 100 may be consistent with the structure of the heavy-duty linear motor stators described above, and will not be described in detail here.

[0052] The excitation region length of the passive linear motor mover 300 is equal to a multiple of the center distance between two adjacent active linear motor stators 100. The spacing between the stators 100 of the active linear motor satisfies the following condition: the spacing is equal to N times the center distance of the stators 100, where N ≥ 4. Taking a center distance of 62.5 mm for the stators 100 as an example, the minimum spacing between the stators 100 is 250 mm, followed by spacings of 312.5 mm and so on. mm, 375 mm, 437.5 mm……. This interval distance minimizes the number of active linear motor stators 100 in the system while ensuring that the passive linear motor mover 300 always receives continuous and stable thrust.

[0053] The distributed linear module provided by this invention replaces continuous long stators with equally spaced short stators, and works in conjunction with a long excitation actuator. This allows the length of the track 200 to be flexibly customized according to actual application requirements, while the active linear motor stator 100 is modularly installed on it at equal intervals. Users can easily increase or decrease the number of stators according to load, speed, and acceleration requirements, achieving unlimited stroke expansion and on-demand thrust configuration, completely eliminating the limitations of fixed stroke, difficult manufacturing, and transportation of traditional long stator motors. Moreover, the manufacturing, testing, transportation, and replacement of the active linear motor stator 100 are simpler and more economical than those of continuous long stators. When a single active linear motor stator 100 module fails, only the individual module needs to be replaced, without scrapping or repairing the entire long stator, greatly reducing maintenance costs and downtime.

[0054] Multiple passive linear motor movers 300 can operate independently and asynchronously on the same track 200, with each mover driven by the stator module of its current location. This allows for multiple different operations to be performed simultaneously on a single production line, achieving true flexible manufacturing. Through software control, production cycle time and process paths can be easily changed to meet the demands of modern industry for small-batch, multi-variety production.

[0055] The excitation region length of the passive linear motor mover 300 is equal to the center distance between two adjacent active linear motor stators 100. This ensures that when the passive linear motor mover 300 moves from one active linear motor stator 100 to the next, its magnetic field always overlaps with at least one active linear motor stator 100 and generates thrust, achieving contactless and impact-free seamless relay drive. This avoids thrust drop or vibration at the stator gap, ensuring stability at high speeds.

[0056] In one embodiment, an encoding sensing plate 4 is provided on the stator 100 of the active linear motor; The passive linear motor actuator 300 is provided with an encoder plate 12, the lengths of the two sides of the encoder plate 12 being longer than the excitation region.

[0057] In this embodiment, the length of the encoder board 12 is set to be longer than the excitation region and is installed on the passive linear motor mover 300. This ensures that when the mover moves from one active linear motor stator 100 to another, at least one active linear motor stator 100's encoder sensing board 4 can always detect the encoder board 12. This achieves seamless relay of position signals during the switching process of the active linear motor stator 100, providing the control system with continuous, uninterrupted absolute position information across the entire stroke, enabling high-precision synchronous control and independent management of multiple movers.

[0058] In one embodiment, the track 200 includes two opposing guide rails 13; The passive linear motor actuator 300 is slidably mounted on the guide rail 13 via a slider 14.

[0059] In this embodiment, two oppositely arranged guide rails 13 form a stable support reference surface, which can effectively resist the overturning torque generated by the passive linear motor mover 300 and its load.

[0060] In one embodiment, the active linear motor stator 100 is fixedly mounted on two guide rails 13 on both sides.

[0061] In this embodiment, all active linear motor stators 100 and the two guide rails 13 are firmly connected into a unified, highly rigid mechanical whole. This greatly enhances the torsional and bending stiffness of the entire track 200, effectively suppressing deformation of the track 200 caused by high-speed movement of the passive linear motor mover 300, load changes, and external forces. This ensures the long-term maintenance of motor thrust stability and system positioning accuracy.

[0062] In one embodiment, the active linear motor stator 100 is positioned between two guide rails 13 on both sides.

[0063] In this embodiment, the mounting panel of the passive linear motor mover 300 is no longer limited by the width of the active linear motor stator 100. Instead, it can be independently mounted on the slider 14 of the two guide rails 13, and its width can be designed to meet any required needs based on the size and shape of the actual load. This greatly enhances adaptability to different application scenarios. Whether it is necessary to carry a large jig, multiple tool heads, or large workpieces, it can all be achieved through a customized mover panel.

[0064] The above description is merely an embodiment and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solution of this utility model without departing from its scope. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model, without departing from its scope, should fall within the protection scope of this utility model.

Claims

1. A heavy-duty linear motor stator, characterized in that, It includes a mounting frame (1), a drive board (2), a control board (3), an encoding induction board (4), and a drive coil assembly (5); The mounting frame (1) includes a mounting positioning frame (101), which includes two opposing side plates (1011) and a partition connecting plate (1012) connecting the two side plates (1011). The partition connecting plate (1012) divides the space between the two side plates (1011) into an upper cavity (1013) and a lower cavity (1014). The partition connecting plate (1012) has partition plates (1015) on both sides. The partition plate (1015) of the upper cavity (1013) divides the upper cavity (1013) into a drive board mounting cavity (1016) and a control board mounting cavity (1017). The partition plate (1015) of the lower cavity (1014) divides the lower cavity (1014) into a drive coil mounting cavity (1018) and an encoding induction board mounting cavity (1019). The drive board (2) is fixedly disposed in the drive board mounting cavity (1016), the control board (3) is fixedly disposed in the control board mounting cavity (1017), the drive coil assembly (5) is disposed in the drive coil mounting cavity (1018), and the encoding sensing board (4) is fixedly disposed in the encoding sensing board mounting cavity (1019).

2. The heavy-duty linear motor stator as described in claim 1, characterized in that, The drive coil mounting cavity (1018) is provided with a first through hole (10110) that passes through the partition connecting plate (1012) and connects the drive board mounting cavity (1016) and / or the control board mounting cavity (1017). The drive coil assembly (5) is electrically connected to the drive board (2) and / or the control board (3) through the first through hole (10110). The partition plate (1015) of the upper cavity (1013) is provided with a second through hole (10111) that connects the drive board mounting cavity (1016) and the control board mounting cavity (1017). The drive board (2) and the control board (3) are electrically connected through the second through hole (10111). The partition connecting plate (1012) is provided with a third through hole (10112) that connects the control board mounting cavity (1017) and the encoding sensing board mounting cavity (1019). The control board (3) and the encoding sensing board (4) are electrically connected through the third through hole (10112).

3. The heavy-duty linear motor stator as described in claim 1, characterized in that, The mounting frame (1) also includes a front fixing plate (102) disposed at the front end of the two side plates (1011), a rear fixing plate (103) disposed at the rear end of the two side plates (1011), an upper fixing plate (104) disposed at the upper end of the two side plates (1011), and a lower fixing plate (105) disposed at the lower end of the two side plates (1011). The front mounting plate (102) and / or the rear mounting plate (103) are used to bring out the power line (6), signal line (7) and test line (8).

4. The heavy-duty linear motor stator as described in claim 3, characterized in that, The front fixing plate (102), rear fixing plate (103), upper fixing plate (104), lower fixing plate (105) and two side plates (1011) enclose a rectangular cavity; The rectangular cavity is filled with epoxy resin (15).

5. The heavy-duty linear motor stator as described in claim 4, characterized in that, The void portion of the rectangular cavity is filled with a filler block (9); The epoxy resin (15) is potted after filling the filler block (9).

6. The heavy-duty linear motor stator as described in claim 1, characterized in that, The outer sides of the two side panels (1011) are equipped with heat dissipation structures.

7. The heavy-duty linear motor stator as described in any one of claims 1-6, characterized in that, It also includes an internal braking resistor (10); The drive board (2) has an internal braking resistor positive lead wire (201), a DC bus positive lead wire (202) and a braking circuit common terminal wire (203) leading out. The internal braking resistor (10) is connected to the positive lead (201) of the internal braking resistor; It also includes a control switch that controls the on / off state of the positive lead (201) of the internal braking resistor and the common terminal line (203) of the braking circuit. The positive lead (202) of the DC bus and the common terminal line (203) of the braking circuit can be used to connect and disconnect the external braking resistor (11). The internal braking resistor (10) and the external braking resistor (11) can be selected to work.

8. The heavy-duty linear motor stator as described in claim 7, characterized in that, The drive board (2) also includes a DC bus negative line (204). The DC bus positive line (202) and DC bus negative line (204) are connected in parallel with a capacitor line (205), a braking resistor control line (206) and a three-phase inverter bridge (207). A capacitor (208) is provided on the capacitor line (205); A diode (209) and a switching element (2010) are sequentially arranged on the braking resistor control line (206), and the common terminal line (203) of the braking circuit is led out from the braking resistor control line (206); The three-phase inverter bridge (207) is connected to the drive coil assembly (5) of the linear motor.

9. The heavy-duty linear motor stator as described in claim 7, characterized in that, The internal braking resistor (10) is fitted into the side plate (1011) inside the drive plate mounting cavity (1016).

10. A linear motor system, characterized in that, It includes the stator of the heavy-duty linear motor as described in any one of claims 1-9, and also includes a mover disposed on the stator of the heavy-duty linear motor.

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