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KR-102962405-B1 - Transport System

KR102962405B1KR 102962405 B1KR102962405 B1KR 102962405B1KR-102962405-B1

Abstract

The present invention relates to a logistics system comprising a rail section arranged to form a predetermined path and including a first coil section having a coil shape inside, and one or more movers movable along the rail section, wherein the movers include a magnet that moves the movers by an electromagnetic field generated by the first coil section, an induction coil in which current is induced by the electromagnetic field generated by the first coil section, a second coil section including an iron core located in the central region of the induction coil, and a battery that stores and supplies electrical energy generated by the second coil section.

Inventors

  • 이준영

Assignees

  • 주식회사 미르

Dates

Publication Date
20260508
Application Date
20250919

Claims (5)

  1. A rail section arranged to form a preset path and including a first coil section having a coil shape inside; a plurality of movers movable along the rail section; and an external control system for controlling the operation of the plurality of movers; comprising The first coil section is provided in a plurality and arranged at predetermined intervals along the path, and includes a winding coil that generates an electromagnetic field by supplied electrical energy and a core located at the center of the winding coil, wherein the winding coil is provided in a plurality and stacked along the height direction of the mover, and the rail section further includes a guide rail that guides the movement of the mover and a charging area capable of charging upon contact with the mover. Each of the above plurality of movers is, A magnet that moves the mover by an electromagnetic field generated by the first coil section; A second coil section comprising an induction coil in which current is induced by the electromagnetic field generated by the first coil section and an iron core section located in the central region of the induction coil; A battery that stores and supplies electrical energy generated by the second coil section; and A wired charging part exposed to the outside of the mover and capable of wired charging in the charging area; wherein the induction coil is provided in a plurality of numbers and stacked along the height direction of the mover, Each of the above plurality of movers can move to the charging area and charge the battery based on the expected consumption of electrical energy in the mover and the current charge amount stored in the battery, and the movement speed and movement path of the mover vary according to the charging efficiency of the electrical energy charged to the battery through the second coil section. The charging area is formed on a separate sub-rail branched from the main path of the rail section, so that a mover stopped for charging does not obstruct the passage of other movers moving along the main path, and The control unit of each of the plurality of movers calculates the minimum required energy required for movement and task execution from the current location to the final destination before stopping the transfer operation and starting charging, and the mover stops charging as soon as the charge amount of the battery reaches a target charge amount obtained by adding a safety factor to the calculated minimum energy, and resumes the stopped transfer operation without waiting for full charging. A logistics system characterized by the fact that when a specific mover, which is one of the plurality of movers, stops a transfer operation and begins moving to the charging area, the external control system executes a task delegation protocol to search for a replacement mover, which is another of the plurality of movers, capable of taking over and processing the stopped transfer operation, and the external control system calculates an optimal rendenzvous point where the two movers can meet within a minimum time based on the current location and path of the specific mover moving for charging and the current location of the replacement mover, the specific mover moves to the calculated rendenzvous point to deliver the cargo and then changes its path to the charging area, and the replacement mover takes over the cargo at the rendenzvous point and resumes transportation.
  2. In paragraph 1, In the event of an emergency situation where the external power supply to the above logistics system is cut off, one or more of the plurality of movers having a charge level exceeding a preset charge level in the battery generate an electromagnetic field inversely through the second coil section, and The above-mentioned generated electromagnetic field induces current in the first coil portion of the rail portion to supply emergency power to the rail portion, and is characterized by The first coil unit is controlled to selectively supply power only to the area where the mover is located or the area where movement is expected, and The guide rail is formed in a recessed or protruding shape along the direction of movement on the upper surface of the rail portion, and a structure is formed on the lower part of the mover that corresponds to and is coupled to the guide rail, thereby physically suppressing vibration and positional fluctuation in a direction orthogonal to the direction of movement of the mover, and maintaining the alignment state and air gap between the first coil portion and the second coil portion to prevent a decrease in charging efficiency. A logistics system characterized in that the core of the first coil section and the iron core of the second coil section are formed in a structure in which a plurality of electrically insulated thin plates are laminated to reduce eddy current loss caused by a time-varying magnetic field, and a plurality of wound coils of the first coil section and a plurality of induction coils of the second coil section are laminated symmetrically in a direction facing each other to maximize mutual inductance.
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Description

Logistics System {Transport System} The present invention relates to a logistics system for transporting objects. More specifically, it relates to a logistics system that improves the charging efficiency of a mover for transporting objects. Advanced manufacturing facilities utilize various logistics systems to transport desired objects (e.g., parts) to the right places. In particular, a linear motion system may include a mover (or moving element) that transports the object and a rail (or stator) that moves the mover. In other words, in a linear motion system, coils are installed on the rails and permanent magnets are installed on the movers, allowing for the transport of objects without complex wiring. Therefore, logistics systems such as linear motion systems can be utilized in various special environments (e.g., environments where hazardous chemicals are used) and offer the advantage of improving process time by individually controlling multiple movers moving along the rails. The aforementioned logistics system requires power supply to the mover to independently control its position and speed. For example, there is an induction method that charges the internal battery of a mover using electromagnetic induction as it passes over a rail equipped with coils. However, wireless charging via this induction method has limitations in rapidly recharging the battery when the charge level is low due to the mover's operating environment. To address this, a new logistics system with improved charging efficiency is required. Japanese Patent Publication No. 5710220 (March 13, 2015) and European Patent Publication No. 3457558 (November 17, 2021) disclose a transmitting coil provided inside a conveyor corresponding to a stator, and a receiving coil installed inside a mover corresponding to a moving body. However, they do not disclose a specific structure of the transmitting coil and the receiving coil for strengthening the electromagnetic field strength to increase charging efficiency. Furthermore, they do not disclose a method of utilizing wired and wireless charging in combination as needed. The features and advantages of the preferred embodiments of the present invention will become more apparent from the following drawings and description. FIG. 1 is an example of a logistics system according to the present invention. Figure 2 illustrates part A of Figure 1. FIG. 3 illustrates a cross-section of a logistics system according to the present invention. Figure 4 is a top view of a part of the logistics system according to the present invention. FIG. 5 illustrates a control block diagram of a mover according to the present invention. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to facilitate a comprehensive understanding of the methods, apparatus, and/or systems described herein. However, this is merely illustrative and the present invention is not limited thereto. In describing the embodiments of the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the present invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification. Terms used in the detailed description are intended merely to describe the embodiments of the present invention and should not be limiting in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "include" or "comprise" are intended to refer to certain characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof other than those described. For example, expressions such as "identical" and "to be identical" indicate not only a strictly identical state, but also a state where tolerances or differences exist in the degree to which the same function is obtained. For example, expressions indicating relative or absolute arrangements, such as "in a certain direction," "along a certain direction," "parallel," "perpendicular," "to the center," "concentric," or "coaxial," not only strictly represent such arrangements but also indicate a state of relative displacement with respect to tolerances or angles or distances to which the same function is obtained. The use of terms such as 'first, second, third' attached to the components mentioned below is intended solely to avoid confusion regarding the components bein