A method and system for reusing magnetic circuits of maglev transportation iron cores

Abstract

This application discloses a method and system for magnetic circuit multiplexing in a maglev core. By utilizing a linear motor core to construct a magnetic circuit multiplexing channel, traction power, power generation, and control information are transmitted together within the channel. Magnetic circuit multiplexing is used to prevent direct interference between electrical signals of different properties caused by circuit multiplexing. The system comprises a linear motor, a traction system, a power generation system, and a control system. The traction system generates traction power, the power generation system generates power generation, and the control system generates control information. The linear motor core is used to construct a magnetic circuit multiplexing channel to transmit traction power, power generation, and control information.

Description

Technical Field

[0001] The present invention relates to the field of maglev transportation, and in particular to a method and system for multiplexing magnetic circuits of iron cores in maglev transportation. Background Art

[0002] Linear motors have been widely used in the industrial field, especially in the rail transit field; traction systems, power supply systems, and communication systems are important systems in the rail transit field.

[0003] In actual cases, linear motors usually only output traction power, and the traction, power supply, and communication systems are independent of each other. However, in addition to transmitting traction power, the long stator winding can, in principle, serve as the transmitter and receiver for contactless power supply and communication signal transmission. For example, in patent 202010299436.0, the coil used to achieve power generation and communication functions is the same coil used for traction of the long stator winding, and it also serves as a channel for traction power output, power transmission, and signal transmission.

[0004] However, the shared circuits among traction, power generation, and communication systems will lead to direct interference between the circuits of the power electromagnetic fields of each path. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for magnetic circuit multiplexing of maglev transportation iron cores. By utilizing the iron cores of linear motors to construct magnetic circuit multiplexing channels, traction power, power generation power and control information can be transmitted together in the magnetic circuit multiplexing channels. Magnetic circuit multiplexing is used to avoid direct interference between electrical signals of different properties caused by circuit multiplexing.

[0006] A first aspect of the present invention provides a method for reusing a magnetic circuit of a maglev transportation iron core, comprising:

[0007] Generate traction power, power generation, and control information;

[0008] The linear motor core is used to construct a magnetic circuit multiplexing channel to transmit traction power, power generation power and control information.

[0009] Furthermore, the linear motor includes:

[0010] The stator is installed on the ground track and the mover is installed on the maglev train;

[0011] The traction winding, the power generation winding and the communication winding are respectively one group or multiple groups.

[0012] Furthermore, traction power, power generation, and control information are generated, including:

[0013] Generate traction power according to the traction requirements of the maglev train;

[0014] generating power according to a power generation control function;

[0015] Generate control information according to the communication protocol.

[0016] Furthermore, the method further comprises:

[0017] Control the segmented transmission of traction power, power generation and control information on different stators.

[0018] A second aspect of the present invention provides a system for reusing magnetic circuits of a maglev transportation iron core, comprising:

[0019] Linear motors, traction systems, power generation systems and control systems;

[0020] The traction system generates traction power, the power generation system generates power generation, and the control system generates control information;

[0021] The linear motor core is used to construct a magnetic circuit multiplexing channel to transmit traction power, power generation power and control information.

[0022] Furthermore, the linear motor includes:

[0023] The stator is installed on the ground track and the mover is installed on the maglev train;

[0024] The traction winding, the power generation winding and the communication winding are respectively one group or multiple groups.

[0025] Furthermore, the traction system is connected to the traction winding, the power generation system is connected to the power generation winding, and the control system is connected to the communication winding.

[0026] Furthermore, the traction system is connected to the traction winding, and the power generation system and the control system share one or more groups of power generation windings.

[0027] Furthermore, the traction system is connected to the traction winding, and the power generation system and the control system share one or more communication windings.

[0028] Furthermore, it also includes:

[0029] The segmented switch is used to control the segmented transmission of traction power, power generation power and control information on different stators.

[0030] Thus, the present invention's magnetic levitation transit core magnetic circuit multiplexing method generates traction power, power generation, and control information, and transmits these information through a magnetic circuit multiplexing channel constructed using the linear motor core. By using the linear motor core to construct a magnetic circuit multiplexing channel, traction power, power generation, and control information are transmitted together within the magnetic circuit multiplexing channel. Magnetic circuit multiplexing is used to prevent direct interference between electrical signals of different properties caused by circuit multiplexing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic flow chart of a method for reusing the magnetic circuit of a maglev transportation iron core provided by the present invention;

[0033] Figure 2 A schematic diagram of the linear motor core magnetic circuit reuse provided by the present invention;

[0034] Figure 3 This is a system structure diagram of the system for reusing the magnetic circuit of the maglev transportation iron core provided by the present invention. DETAILED DESCRIPTION

[0035] The present application discloses a method and system for magnetic circuit multiplexing of a maglev transportation iron core. By utilizing a linear motor iron core to construct a magnetic circuit multiplexing channel, traction power, power generation power, and control information are transmitted together in the magnetic circuit multiplexing channel. Magnetic circuit multiplexing is used to avoid direct interference between electrical signals of different properties caused by circuit multiplexing.

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0039] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] Please refer to Figure 1 The embodiment of the present invention provides a method for reusing a magnetic circuit of a maglev transportation iron core, comprising:

[0042] 101. Generate traction power, power generation, and control information;

[0043] In this embodiment, the traction power is generated based on existing technology according to the traction requirements of the maglev train. The generated power may specifically be contactless induction generated power, and the control information may specifically be a communication signal, etc.

[0044] 102. Use the linear motor core to construct a magnetic circuit multiplexing channel to transmit traction power, power generation power, and control information.

[0045] In this embodiment, the schematic diagram of the linear motor core magnetic circuit reuse is as follows: Figure 2 As shown, 201 is the traction winding, 202 is the power generation winding, 203 is the communication winding, 204 is the motor rotor core, 205 is the motor stator core, 206 is the communication winding, 207 is the power generation winding, 208 is the traction winding, 209 represents the magnetic lines, 210 represents the air gap, the air gap δ is 0mm~∞, and the motor magnetic flux n generated by the traction windings 201 and 208 is expressed as B 1,n (x) = B m1,n cos(f 1,n (x)+θ 1,n ), the supply electromagnetic flux n generated by the generating windings 202 and 207 is expressed as B 2,n (x) = B m2,n cos(f 2,n (x)+θ 2,n ), the antenna magnetic flux n generated by the communication windings 203 and 206 is expressed as B 3,n (x) = Bm3,n cos(f 3,n (x)+θ 3,n ), the magnetic flux of n electromagnets is the basis for the maglev train to levitate, expressed as B 4,n (x) = B m4,n cos(f 4,n (x)+θ 4,n ).

[0046] exist Figure 2 In the figure, it is assumed that the stator side is used as the output side of the common transmission channel for the linear motor traction power information and other magnetic circuit multiplexing information, and the mover side is used as the receiving side of the linear motor traction power information and other magnetic circuit multiplexing information.

[0047] Taking into account the bidirectional flow of energy feedback and signals, in the magnetic circuit multiplexing channel of the iron core, the transmission of the above energy and signals is bidirectional, that is, it can be transmitted from the long stator side to the mover side, or from the mover side to the long stator side.

[0048] Figure 2 The winding 202 and the winding 207 are energy transmitting and receiving windings, respectively, and the winding 203 and the winding 206 are communication pickup windings and communication transmitting antennas, respectively.

[0049] It can be seen that in the magnetic circuit multiplexing channel constructed by the iron core of the linear motor structure, each magnetic flux is contained in the iron core. By using the linear motor iron core to construct a magnetic circuit multiplexing channel, the traction power, power generation power, and control information are transmitted together in the magnetic circuit multiplexing channel. Magnetic circuit multiplexing is used to avoid direct interference between electrical signals of different properties caused by circuit multiplexing.

[0050] like Figure 3 As shown, 301 is the stator of the linear motor with multiplexing of the core magnetic circuit (the upper section of the coupling section), 302 is the stator of the linear motor with multiplexing of the core magnetic circuit (the coupling section), 303 is the on-board electromagnet, 304 is the body of the maglev train, 305 is the stator of the linear motor with multiplexing of the core magnetic circuit (the lower section of the coupling section), 306 is the stator of the linear motor with multiplexing of the core magnetic circuit, 307 is the traction winding, 308 is the power generation winding, 309 is the communication winding, 310 is the electromagnet pole, 311 is the excitation electromagnet, 312 is the on-board winding, and 313 is the segment switch.

[0051] Optionally, combine Figure 3 As shown, in some embodiments of the present invention, the linear motor structure includes:

[0052] Stators 301, 302, 305, 306 are arranged on the ground track, and movers 303, 310 are installed on the maglev train. The stators and movers form the core of the linear motor.

[0053] The traction winding 307 , the power generation winding 308 , and the communication winding 309 , the traction winding 307 , the power generation winding 308 , and the communication winding 309 are respectively one group or multiple groups.

[0054] In practice, using Fourier transform, the excitation function that meets certain conditions can be expressed as a linear combination of trigonometric functions (sine or cosine functions) or their integrals. The expression is generally as follows:

[0055]

[0056] Fundamentally speaking, the linear motor core magnetic circuit is multiplexed into a magnetic circuit multiplexing channel, that is, the core contains traction power, power generation power and control information. The excitation structure within the core's magnetic circuit multiplexing channel is as follows:

[0057] f(t) all =f(t) traction +f(t) generation +f(t) communication

[0058] f(t) all Represents all the information carried by the linear motor core magnetic circuit, f(t) traction represents the traction power, f(t) generation represents the generated power, f(t) communication Represents control information, each excitation can correspond to one or more windings. Figure 2 The middle windings 206, 207, and 208 are connected to the excitation f(t) communication 、f(t) generation 、f(t) traction , through the core magnetic circuit multiplexing, the traction power, generation power, and control information are transmitted to the receiving side. Similar to the excitation, the received power or signal can also be expressed as follows:

[0059] F(t) all =F(t) traction +F(t) generation +F(t) communication

[0060] F(t) all Represents all the power and signals received by the receiving end, F(t) traction represents the traction power, F(t) generation represents the generated power, F(t) communication Indicates control information. Each power and signal can correspond to one or more windings at the receiving end.

[0061] Figure 2 The middle windings 201, 202, and 203 receive power and signal F(t) respectively. traction、F(t) generation 、F(t) communication , and then connected to the vehicle-mounted power conversion device or signal processing device to restore the traction power, power generation power and control information.

[0062] Optionally, in some embodiments of the present invention, the traction system is connected to the traction winding, the power generation system is connected to the power generation winding, and the control information system is connected to the communication winding.

[0063] In addition, the power generation system and the control information system can also share one or more groups of power generation windings according to the power level.

[0064] In addition, the power generation system and the control information system can also share one or more communication windings according to the power level.

[0065] Optionally, in some embodiments of the present invention, Figure 3 The system also includes a segment switch 313. The functions of the traction system, power generation system, and control information system can be implemented in segments or uniformly across the entire line. The segment switch 313 can be controlled to realize segmented transmission of traction power, power generation power, and control information on different stators.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0067] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0068] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for reusing the magnetic circuit of a maglev transportation iron core, characterized in that: include: Generate traction power, power generation, and control information; Using the linear motor core to construct a magnetic circuit multiplexing channel to transmit the traction power, the generated power, and the control information; The linear motor comprises: The stator is installed on the ground track and the mover is installed on the maglev train; Traction winding, power generation winding and communication winding, wherein the traction winding, the power generation winding and the communication winding are respectively one or more groups; The motor magnetic flux is generated by exciting the traction winding on the motor rotor core and the traction winding on the motor stator core; The generating winding on the motor rotor core and the generating winding on the motor stator core are excited to generate electromagnetic flux; The antenna magnetic flux is generated by exciting the communication winding on the motor rotor core and the communication winding on the motor stator core.

2. The method according to claim 1, characterized in that The generating of traction power, power generation power, and control information includes: Generate traction power according to the traction requirements of the maglev train; generating power according to a power generation control function; Generate control information according to the communication protocol.

3. The method according to claim 2, characterized in that The method further comprises: Control the segmented transmission of the traction power, the power generation power, and the control information on different stators.

4. A system for multiplexing magnetic circuits of a maglev transportation iron core, characterized in that: include: Linear motors, traction systems, power generation systems and control systems; The traction system generates traction power, the power generation system generates power generation, and the control system generates control information; Using the linear motor core to construct a magnetic circuit multiplexing channel to transmit the traction power, the generated power, and the control information; The linear motor comprises: The stator is installed on the ground track and the mover is installed on the maglev train; Traction winding, power generation winding and communication winding, wherein the traction winding, the power generation winding and the communication winding are respectively one or more groups; The motor magnetic flux is generated by exciting the traction winding on the motor rotor core and the traction winding on the motor stator core; The generating winding on the motor rotor core and the generating winding on the motor stator core are excited to generate electromagnetic flux; The antenna magnetic flux is generated by exciting the communication winding on the motor rotor core and the communication winding on the motor stator core.

5. The system for reusing magnetic circuits of maglev transportation iron cores according to claim 4, characterized in that: The traction system is connected to the traction winding, the power generation system is connected to the power generation winding, and the control system is connected to the communication winding.

6. The system for reusing magnetic circuits of maglev transportation iron cores according to claim 4, characterized in that: The traction system is connected to the traction winding, and the power generation system and the control system share one or more groups of the power generation windings.

7. The system for reusing magnetic circuits of maglev transportation iron cores according to claim 4, characterized in that: The traction system is connected to the traction winding, and the power generation system and the control system share one or more communication windings.

8. The system for multiplexing the magnetic core magnetic circuits of maglev transportation according to any one of claims 5 to 7, characterized in that: Also includes: The segmented switch is used to control the segmented transmission of the traction power, the power generation power, and the control information on different stators.

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