Induction electromotive force generator and self-generating monitoring device for electric mobility

Abstract

To provide an induced electromotive force generator and a self-generating monitoring device that can acquire induced electromotive force generated by electromagnetic induction even from a long conductive member that the current collector contacts while moving. [Solution] The induced electromotive force generator 1 includes a power generation unit 11 that obtains induced electromotive force from a fluctuating magnetic field 101 generated from conductive elongated members 100, 205, 235 that supply power to current collectors 231, 235 that make contact while moving, and a power accumulation unit 12 that accumulates power from the induced electromotive force obtained by the power generation unit 11 to drive electrical components 14, 15, 30, 30A, 30B, 30C, 40. The power generation unit 11 is positioned in a region within the fluctuating magnetic field 101 that does not interfere with the current collectors 231, 235 that slide against the conductive elongated members.

Description

Technical Field

[0001] The present invention relates to an induced electromotive force generator that obtains electric power from a magnetic field generated by a conductor through which current flows, and a self-powered monitoring device for electric mobility.

Background Art

[0002] Conventionally, a power generation system that obtains an induced electromotive force generated by electromagnetic induction from a magnetic field generated by a conductor through which current flows is well-known. For example, Patent Document 1 discloses a technique for a monitoring camera system that generates a main power source through an electromagnetic induction method from the current flowing through a power distribution line to secure power. Also, for example, Patent Document 2 discloses a technique for a current monitoring device that converts a magnetic field generated in the vicinity of a wiring through which current flows into a current by electromagnetic induction to autonomously supply power.

[0003] Furthermore, for example, Patent Document 3 discloses a technique for a monitoring device that generates power from an induced current obtained by electromagnetic induction coupling with an electric wire. Incidentally, for example, Patent Document 4 discloses a technique for a wireless transmitter that wirelessly transmits a measured value of the current flowing through a voltage wire in a distribution board to a device arranged outside the distribution board.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, the conventional power generation devices described in Patent Documents 1-4 have a configuration in which wiring is inserted through the power generation device itself or an annular core provided by the power generation device. As a result, conventional power generation systems have a problem in that they cannot be used in electric mobility, for example, because the current collector, which moves and makes contact with the wiring, interferes with the power generation device. In other words, conventional power generation systems are a technology that cannot be applied to electric mobility such as trolleybuses, trams (electric trains), and railway vehicles, which are supplied with power via current collectors such as trolley poles, bow collectors, and pantographs that move and make contact with long conductive members such as trolley wires.

[0006] Therefore, the present invention has been made in view of the above circumstances, and its object is to provide an induced electromotive force generator and a self-generating monitoring device for electric mobility that can acquire induced electromotive force generated by electromagnetic induction even from a conductive long member that a current collector contacts while moving. [Means for solving the problem]

[0007] An induced electromotive force generating device according to one aspect of the present invention includes a power generation unit that obtains an induced electromotive force from a fluctuating magnetic field generated from a conductive elongated member that supplies power to a current collector that is in contact with it while moving and / or from which the power is returned from the wheels, and a power accumulation unit that accumulates power to drive electrical components using the induced electromotive force obtained by the power generation unit, wherein the power generation unit is disposed in a region within the fluctuating magnetic field that does not interfere with the current collector that slides on the conductive elongated member.

[0008] A self-generating monitoring device for electric mobility according to one aspect of the present invention includes a power generation unit that obtains an induced electromotive force by a fluctuating magnetic field generated from a conductive elongated member that supplies power to a current collector that it contacts while moving and / or from which the power is returned from the wheels, and a power accumulation unit that accumulates power to drive electrical components using the induced electromotive force obtained by the power generation unit, wherein the power generation unit includes an induced electromotive force generating device disposed in a region within the fluctuating magnetic field that does not interfere with the current collector that slides on the conductive elongated member.

[0009] The power generation unit of the induction electromotive force generating device is positioned away from the current collector, with the single wire in between.

[0010] The power generation unit of the induced electromotive force generating device is positioned at a location away from the current collector from the axial center of the conductive elongated member.

[0011] The power generation unit of the induced electromotive force generator is positioned within the fluctuating magnetic field generated from the trolley wire that supplies power to the electric mobility device to obtain the induced electromotive force.

[0012] The power generation unit of the induced electromotive force generator is positioned within the fluctuating magnetic field generated from the third rail that supplies driving power to the electric mobility device, thereby obtaining the induced electromotive force.

[0013] The aforementioned electric mobility includes railway vehicles, trolleybuses, or trams.

[0014] The power generation unit of the induced electromotive force generating device is positioned within the fluctuating magnetic field generated by the conductive elongated member to which an alternating current for driving the electric mobility device is supplied, thereby generating the induced electromotive force.

[0015] The power generation unit of the induced electromotive force generating device is positioned within the fluctuating magnetic field generated by the conductive elongated member to which a direct current for driving the electric mobility device is supplied, thereby obtaining the induced electromotive force.

[0016] The power generation unit of the induced electromotive force generating device is positioned within the fluctuating magnetic field generated in the conductive elongated member by the input fluctuation of the DC current when the current collector that slides on the electric elongated member passes over it, thereby generating the induced electromotive force.

[0017] The power generation unit of the induced electromotive force generator is positioned within the fluctuating magnetic field generated from the rails through which current is returned from the wheels of the electric mobility device, thereby obtaining the induced electromotive force.

[0018] The power generation unit of the induced electromotive force generator is disposed in the variable magnetic field generated from the power feeding branch line for supplying driving power for electric mobility to the electric long member, and obtains the induced electromotive force.

[0019] In the induced electromotive force generator, a plurality of the power generation units are electrically connected in series.

[0020] In the induced electromotive force generator, a plurality of the power generation units are electrically connected in parallel.

[0021] The electrical components of the induced electromotive force generator include a sensor unit.

[0022] The sensor unit of the induced electromotive force generator includes a temperature measuring sensor for detecting the temperature of a wiring fitting for supplying power to the conductive long member.

[0023] The sensor unit of the induced electromotive force generator includes an image sensor.

[0024] The sensor unit of the induced electromotive force generator includes a distance measuring sensor.

[0025] The sensor unit of the induced electromotive force generator includes a photoelectric sensor, a torque sensor, a speed sensor, an acceleration sensor, a pressure sensor, a flow sensor, a strain sensor, a load sensor, an axial force sensor, a vibration sensor, a wind speed and wind direction sensor, a direction sensor, a magnetic sensor, an electric current sensor, a radiation sensor, a liquid leakage sensor, a leakage current sensor, a ground fault sensor, a short circuit sensor, a liquid detection sensor, a gas sensor, an odor sensor, a powder and granule sensor, and / or a sound sensor.

[0026] The electrical components of the induced electromotive force generator include a communication unit for wirelessly transmitting the physical related information detected by the sensor unit to a higher-level system.

Advantages of the Invention

[0027] According to the present invention, it is possible to provide an induced electromotive force generator and a self-generating monitoring device for electric mobility that can acquire induced electromotive force generated by electromagnetic induction even from a conductive long member that a current collector contacts while moving. [Brief explanation of the drawing]

[0028] [Figure 1] Block diagram showing an example of the induction electromotive force generator of this embodiment. [Figure 2] The same schematic diagram shows the position of the single track and the power generation section in a view of the direction of extension of the single track. [Figure 3] The same schematic diagram shows the view with the power generation unit superimposed on a single track. [Figure 4] A schematic diagram showing an example of an induced electromotive force generator in a catenary-type overhead line system. [Figure 5] A schematic diagram showing a catenary-type overhead line system equipped with an induced electromotive force generator. [Figure 6] This schematic diagram shows a configuration in which the power generation unit is located between two ear sections connected to the housing of the induction electromotive force generator. [Figure 7] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the first modified example. [Figure 8] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the second modified example. [Figure 9] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the third modified example. [Figure 10] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the fourth modified example. [Figure 11] A schematic diagram showing the configuration of an induced electromotive force generator having a sensor section of an image sensor according to the fifth modified example. [Figure 12] A schematic diagram showing the configuration of an induced electromotive force generator having a sensor section of a distance measuring sensor according to the sixth modified example. [Figure 13] Schematic diagram showing the configuration of the induction electromotive force generator according to the seventh modified example. [Figure 14] The seventh modified example is a schematic diagram showing the distance between the power generation unit and the trolley wire in Figure 13. [Figure 15] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the eighth modified example. [Figure 16] Schematic diagram showing the configuration of the power generation section of the induction electromotive force generator according to the ninth modified example. [Figure 17] A schematic diagram showing an example of an induced electromotive force generator installed in the feeder branch line of a catenary suspension type overhead line system according to the 10th modified example. [Figure 18] A schematic diagram showing a third-rail railway vehicle, relating to the 11th modification. [Figure 19] This is a schematic diagram showing an example of the arrangement of the power generation section of an induced electromotive force generator in a third rail system, relating to the 11th modification. [Figure 20] This schematic diagram shows an example of an induced electromotive force generating device installed near rails, relating to the 12th modification. [Figure 21] This schematic diagram shows an example of an induced electromotive force generator in which multiple power generation units are electrically connected in series, relating to the 13th modification. [Figure 22] This schematic diagram shows an example of an induced electromotive force generator in which multiple power generation units are electrically connected in parallel, relating to the 14th modification. [Modes for carrying out the invention]

[0029] The induction electromotive force generating device of the present invention will be described below with reference to the drawings. Please note that the drawings based on each embodiment in the following description are schematic, and the relationship between the thickness and width of each part, as well as the ratio of the thicknesses of each part, may differ from the actual dimensions, and there may be differences in dimensional relationships and ratios between drawings.

[0030] Figure 1 is a block diagram showing an example of an induced electromotive force generator according to this embodiment. The induced electromotive force generator 1 includes a power generation unit 11, a power integration unit 12, a power storage circuit 13, an MCU (Micro Control Unit) 14, a non-volatile memory 15, a sensor unit 30, a communication unit 40, and the like.

[0031] The power generation unit 11, the power collection unit 12, and the energy storage circuit 13 constitute the power generation unit 10 as a means of generating electricity. The power collection unit 12, the energy storage circuit 13, the MCU 14, the memory 15, and the communication unit 40 are mounted on a circuit board or the like and housed in a box-shaped electrically insulating case, which is the housing 20.

[0032] The power generation unit 11 includes a core 16, coil wires 17, etc. (see Figures 2 and 3). The power generation unit 11 is positioned in a direction perpendicular to the direction of magnetic flux within the fluctuating magnetic field generated outside the induced electromotive force generator 1. An induced electromotive force is then generated in the power generation unit 11 within the fluctuating magnetic field. As a result, an induced current flows through the coil wires 17 of the power generation unit 11 due to the induced electromotive force. The coil wires 17 may have a coil shape such as a spiral, or they may be string-shaped (wire-shaped), loop-shaped, spiral-shaped, or a combination of these.

[0033] The power accumulation unit 12 is a capacitor or the like for accumulating the power generated by the power generation unit 11. The power accumulation unit 12 is for accumulating the power obtained when, for example, the amount of power obtained from the power generation unit 11 is less than the amount lost due to self-discharge of the energy storage circuit 13.

[0034] The energy storage circuit 13 has a higher voltage resistance and higher energy storage capacity compared to the power integration unit 12, which consists of a secondary battery (lithium-ion secondary battery), electrolytic capacitor, electric double-layer capacitor, film capacitor, pseudo-capacitor, or a capacitor combining these.

[0035] A conversion circuit may be placed between the power integrator 12 and the energy storage circuit 13. This conversion circuit converts high-voltage power into power that can be handled by the energy storage circuit 13, for example, when the power integrator 12 is integrating high-voltage power. Therefore, the energy storage circuit 13 can store the power converted by the conversion circuit without losing the integrated power.

[0036] The MCU14 includes a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and I / F (Interface), which are not shown in the diagram. Note that the MCU14 may be replaced with a CPU, memory, etc., and of course, a CPU, memory, etc. may be used in conjunction with it.

[0037] The CPU controls the overall operation of the induced electromotive force generator 1. Various programs, parameters, etc., may be pre-stored in the ROM. The RAM can be used as a work area, etc., when the CPU executes various programs. These CPU, ROM, and RAM are connected to each other via transmission lines such as the address bus, data bus, control bus, and control bus.

[0038] The sensor unit 30 detects external physical changes, information about physical states (physical-related information), etc. Specific examples of the sensor unit 30 will be described later.

[0039] The communication unit 40 can communicate wirelessly with external higher-level systems and exchange various data and information. For example, the communication unit 40 can transmit physical information detected by the sensor unit 30 to the higher-level system.

[0040] Furthermore, the communication unit 40 may be, for example, an information and communication device connected to a network such as the Internet via a server (not shown) from the router. The communication unit 40 may also be connected to a public network, consist of multiple units to constitute a multi-hop system, or form a gateway system.

[0041] The wireless communication method used by the communication unit 40 can include next-generation communication systems such as Bluetooth, Wi-Fi, UWB, Thread, ZigBee, Matter, 5G, 6G and beyond, as well as LPWA (NB-IoT, LTE-M, Sigfox, LoRaWAN, ZETA), etc.

[0042] Figures 2 and 3 are schematic diagrams showing the arrangement of the power generation unit 11 with respect to a single wire 100 through which current flows. Figure 2 is a schematic diagram showing the positions of the single wire 100 and the power generation unit 11 when viewed in the direction of extension of the single wire 100, and Figure 3 is a schematic diagram showing the view when the power generation unit 11 is superimposed on the single wire 100.

[0043] In Figures 2 and 3, the direction parallel to the extension direction (longitudinal direction) of the single wire 100 is defined as the X direction, the direction in which the single wire 100 and the power generation unit 11 are arranged is defined as the Z direction, and the direction perpendicular to the XZ plane is defined as the Y direction.

[0044] As shown in Figures 2 and 3, the power generation unit 11 has a core 16 and coil wires 17. The core 16 is a metal rod such as an iron core. The coil wires 17 are metal strands such as copper wire. In the power generation unit 11, the coil wires 17 are wound around the outer circumference of the core 16.

[0045] As shown in Figure 2, a single wire 100, which is a long conductive member such as an electric wire, generates a circular fluctuating magnetic field 101 from its axis center O when current flows through it. The power generation unit 11, which consists of a core 16 and a coil conductor 17, is placed within the fluctuating magnetic field 101 generated by the single wire 100, thereby inducing electromotive force in the coil conductor 17 and causing an induced current to flow.

[0046] As shown in Figures 2 and 3, the power generation unit 11 is positioned near the single wire 100, maintaining a predetermined distance from the single wire 100 so as not to come into contact with it. The power generation unit 11 may also have an electrically insulating covering, such as a laminate tube, to prevent rust, short circuits, etc.

[0047] The induced electromotive force generator 1 generates an induced electromotive force in the power generation unit 11 by, for example, arranging the power generation unit 11 near a single wire 100 through which current is flowing. The induced electromotive force generator 1 then supplies the power necessary for the operation of the MCU 14 and memory 15, which include passive and active elements, and the sensor unit 30 and communication unit 40, which are electronic components.

[0048] In other words, the induced electromotive force generator 1 is positioned so that the power generation unit 11 is within the magnetic field generated by the current flowing on a single wire 100 and crosses the magnetic flux, thereby inducing an electromotive force in the coil conductor 17 of the power generation unit 11 and causing an induced current to flow. The predetermined gap between the single wire 100 and the power generation unit 11 is set appropriately according to the strength of the current flowing through the single wire 100, the magnitude of the desired induced electromotive force generated in the power generation unit 11, etc. Furthermore, the fluctuating magnetic field 101 generated by the single wire 100 can be the fluctuating magnetic field 101 generated around a single wire through which an alternating current or a direct current flows.

[0049] The power generated by the power generation unit 11 is stored in the power accumulation unit 12. The power stored in the power accumulation unit 12 is then input to the energy storage circuit 13 and stored. The MCU 14 operates by receiving a portion of the power that flows through the energy storage circuit 13.

[0050] Furthermore, the MCU 14 may be configured to recognize the remaining amount of power stored in the power storage circuit 13. When the recognized remaining amount of power exceeds a threshold, the MCU 14 can be configured to supply power to each power demand unit by a power supply means (not shown). Thus, the MCU 14 can also detect physical information using the sensor unit 30 and transmit that physical information to an external higher-level system using the communication unit 40. In other words, the induced electromotive force generator 1 is a self-generating device that utilizes the fluctuating magnetic field 101 generated by a single line 100.

[0051] As described above, the induction electromotive force generator 1 of this embodiment can obtain and store an induced electromotive force by utilizing the fluctuating magnetic field 101 generated by the current flowing through the single wire 100. Therefore, the induction electromotive force generator 1 can operate each electrical component by self-power supply using the stored power.

[0052] By utilizing this energy harvesting method, which obtains electromagnetic induction electromotive force from spatial magnetic flux, it is possible to stably obtain induced electromotive force and operate electrical components reliably, regardless of season, weather, time of day, temperature, humidity, etc. As a result, the induction electromotive force generator 1 can detect physical-related information by the sensor unit 30 almost constantly and in real time.

[0053] Here, we will describe the specific installation location of the induced electromotive force generator 1 and an example of the information detected by the sensor unit 30. In this example, we will illustrate the induced electromotive force generator 1 as a monitoring device in a catenary suspension type overhead catenary system for a railway vehicle 320, which is an electric mobility vehicle.

[0054] Figure 4 is a schematic diagram showing an example of an induced electromotive force generator 1 in a catenary-type overhead line system. Note that the overhead line system is not limited to the catenary-type, but may also be an overhead line system such as a direct suspension system, a feeder suspension system, or a rigid body overhead line system. As shown in Figure 4, the power transmission equipment for a railway overhead line includes a substation 200, a feeder line 201, a return line 202, a feeder branch line 203, a suspension line 204, a trolley wire 205, etc.

[0055] Substation 200 supplies electricity to feeder line 201. That is, feeder line 201 is a power supply line. This feeder line 201 is suspended by being connected to a suspension insulator 208 attached to a feeder line bracket 207 which is mounted on a utility pole 206, etc. The return line 202 is electrically connected to the rail 232 laid on the roadbed. The return line 202 is a cable that returns the electricity supplied to the railway vehicle 230 to substation 200 via the rail 232.

[0056] The feeder branch line 203 is a conductive wire, such as metal, that electrically connects the feeder wire 201 and the trolley wire 205. In other words, the feeder branch line 203 is a power supply branch wire that supplies electricity transmitted from the feeder wire 201 to the trolley wire 205. This feeder branch line 203 has a feed ear 220 that is electrically connected to the trolley wire 205. As a result, the electricity sent from the substation 200 flows in the order of feeder wire 201, feeder branch line 203, and trolley wire 205.

[0057] The suspension wire 204 suspends the trolley wire 205 by multiple hangers installed at predetermined intervals, holding it in place so that it does not sag and maintains a nearly constant (horizontal) distance from the ground. The suspension wire 204 is suspended and held by long trunk insulators 210 attached to overhead wire brackets 209 mounted on utility poles 206, etc.

[0058] The trolley wire 205 is a contact wire that supplies power to the railway vehicle 230 through the pantograph 231, a current collector that makes contact while moving. This trolley wire 205, like the single wire 100 described above, constitutes a long conductive member. An induced electromotive force generator 1 is also installed on the trolley wire 205.

[0059] The induced electromotive force generator 1 here can be fixed to the trolley wire 205 by two ear sections 21, which serve as fixing means, as shown in Figure 5. Figure 5 is a schematic diagram showing the configuration of the induced electromotive force generator 1 installed in a catenary suspension type overhead line system.

[0060] Each ear portion 21 supports the lower surface, which is the lower end of the housing 20. Each ear portion 21 is connected to the housing 20 in an electrically insulated manner. The ear portion 21 may be made of an electrically insulating material such as synthetic resin. Each ear portion 21 is positioned at a predetermined distance from the trolley wire 205 along its extending direction. Each ear portion 21 grips a pair of gripping grooves 205a formed opposite each other on both upper sides of the trolley wire 205.

[0061] The pair of gripping grooves 205a of the trolley wire 205 are formed vertically above the axial center O of the trolley wire 205 (hereinafter sometimes simply referred to as center O) in a direction away from the pantograph 231. The housing 20 is positioned vertically above the trolley wire 205 at a predetermined distance by each ear portion 21. As a result, the induced electromotive force generator 1 is fixed at a predetermined distance vertically above the trolley wire 205.

[0062] The induction electromotive force generator 1 has a power generation unit 11 positioned in the space between the housing 20 and the trolley wire 205. The power generation unit 11 can be positioned in a space that does not come into contact with the trolley wire 205. The power generation unit 11 has a core 16 whose ends are supported by brackets 18 on the housing 20.

[0063] In this case, the power generation unit 11 can be positioned such that its lower end is vertically above the upper end of the trolley wire 205, and it is positioned vertically above the lower end of the trolley wire 205 at a predetermined distance. That is, since the railway vehicle 230 supplies power by the pantograph 231 of the current collection device contacting the lower end of the trolley wire 205, the power generation unit 11 is positioned so as not to interfere with the pantograph 231. Therefore, the power generation unit 11 is positioned at a predetermined distance away from the pantograph 231 of the current collection device, which slides along the trolley wire 205, with the trolley wire 205 in between.

[0064] Furthermore, since the power generation unit 11 is positioned vertically above the trolley wire 205 and away from the pantograph 231, it will not come into contact with the pantograph 231 even when the trolley wire 205 reaches the wear limit remaining diameter specified by the contact (sliding) of the pantograph 231 of the moving railway vehicle 230. In other words, the power generation unit 11 is positioned in a region where it does not interfere with the trolley wire 205 even when the trolley wire 205 reaches the wear limit remaining diameter.

[0065] Each bracket 18 is connected to the underside of the housing 20 and extends downward. The coil wires 17 of the power generation unit 11 are inserted into each bracket 18. The coil wires 17 are then electrically connected to the power integration unit 12.

[0066] Furthermore, as shown in Figure 6, the power generation unit 11 is positioned in a space between the two ear sections 21 and the unit, so as to ensure electrical isolation between the power generation unit 11 and the two ear sections 21. Figure 6 is a schematic diagram showing a configuration in which the power generation unit 11 is provided between the two ear sections 21 connected to the housing 20 of the induction electromotive force generator 1.

[0067] The sensor unit 30 connected to the induction electromotive force generator 1 is, in this case, a temperature sensor 30A that includes one of the following: a thermocouple, a thermistor, a resistance thermometer, or an IC temperature sensor. The temperature sensor unit 30A is installed on a power supply feed ear 220 connected to the trolley wire 205 via a cable 31 such as a lead wire. As a result, the induction electromotive force generator 1 detects the temperature change of the feed ear 220 using the temperature sensor unit 30A. The feed ear 220 is a wiring fitting made of a metal such as hard copper that has electrical conductivity.

[0068] As described above, the induction electromotive force generator 1 of this embodiment can generate and store induced electromotive force by utilizing the magnetic field generated from the trolley wire 205 to which current is supplied, in either an AC electrification system or a DC electrification system that supplies power to a railway vehicle 230, which is an electric mobility device. Furthermore, the induction electromotive force generator 1 can generate and store induced electromotive force even in electrification systems of the railway vehicle 230 where AC and DC sections coexist.

[0069] In the AC electrification system, alternating current flows from the substation 200 to the trolley wire 205 via the feeder line 201 and the feeder branch line 203. In this AC electrification system, the direction of the current flowing through the trolley wire 205 changes periodically, and consequently, the strength of the magnetic field changes periodically, constantly generating a fluctuating magnetic field 101. Therefore, the induced electromotive force generator 1 can generate an induced electromotive force in the power generation unit 11 located within the fluctuating magnetic field 101, thereby obtaining an induced current.

[0070] On the other hand, in a DC electrification system, a DC current flows from the substation 200 to the trolley wire 205 via the feeder line 201 and the feeder branch line 203. In this DC electrification system, since the direction of the current flowing through the trolley wire 205 is constant, the strength of the magnetic field does not change periodically. Therefore, in a DC electrification system, a fluctuating magnetic field 101 does not usually occur.

[0071] However, the DC current flowing through the trolley wire 205 fluctuates when the railway vehicle 230 passes by. In other words, the DC current flowing through the trolley wire 205 changes at the point where the pantograph 231 is in contact with the trolley wire 205 when the railway vehicle 230 passes by.

[0072] Thus, in a DC electrification system, when a railway vehicle 230 passes over it, a fluctuating magnetic field 101 is generated as a DC magnetic field fluctuation, where the strength of the magnetic field changes at the point where the pantograph 231 is in contact with the trolley wire 205. Furthermore, if there is pulsation in the current supplied from the substation 200, the strength of the magnetic field changes accordingly, and a fluctuating magnetic field 101 is constantly generated.

[0073] In this case, the induction electromotive force generator 1 can generate an induced electromotive force in the power generation unit 11 located within the fluctuating magnetic field 101, thereby obtaining an induced current. Therefore, even in a DC electrification system, the induction electromotive force generator 1 can generate an induced electromotive force in the coil conductor 17 and obtain an induced current by arranging the power generation unit 11 within the fluctuating magnetic field 101.

[0074] As described above, in this embodiment, the induction electromotive force generator 1 can obtain an induced current from the fluctuating magnetic field 101 generated in the trolley wire 205 (single wire 100) in either an AC electrification system or a DC electrification system. Therefore, the induction electromotive force generator 1 can obtain an induced current from the power generation unit 11 by utilizing the magnetic field generated by the current flowing through the trolley wire 205 (single wire 100) and store it in the energy storage circuit 13 via the power accumulation unit 12. As a result, the induction electromotive force generator 1 can operate electrical components such as the MCU 14, memory 15, sensor unit 30, and communication unit 40 by self-power supply using the power stored in the energy storage circuit 13.

[0075] Incidentally, the feed ear 220 may become hot due to its own resistance, which consumes the high-voltage current transmitted from the feed line 201 to the feed branch line 203. For this reason, the induction electromotive force generator 1 has a temperature sensor unit 30A that detects the temperature state of the feed ear 220, and the communication unit 40 can transmit this information to base stations such as the substation 200, the railway vehicle depot for the railway vehicle 230, and the operation management center.

[0076] In other words, the induced electromotive force generator 1 transmits information about the temperature state of the feed ear 220 via wireless communication. Base stations such as substations 200, railway vehicle depots for railway vehicles 230, and operation control centers can monitor the temperature information of the feed ear 220 received from the induced electromotive force generator 1 to check for any abnormalities. In this way, the induced electromotive force generator 1 can constitute a self-generating monitoring device for electric mobility such as railway vehicles 230, trolleybuses, and trams, which are supplied with driving power from the trolley wire 205.

[0077] (First variation) Figure 7 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the first modified example. As shown in Figure 7, the power generation section 11 of the induction electromotive force generator 1 in this modified example has a roughly arc-shaped (roughly C-shaped) core 16 that covers the upper side of the trolley wire 205.

[0078] In this modified example, the arc length of the core 16 is defined such that the power generation unit 11 is located vertically above the lower end of the gripping groove 205a of the trolley wire 205. That is, the power generation unit 11 in this modified example is also provided vertically above the axis center O of the trolley wire 205.

[0079] As a result, the power generation unit 11 is prevented from interfering with the pantograph 231 of the moving railway vehicle 230, even when the remaining diameter of the trolley wire 205, which is worn down by contact with the pantograph 231, reaches the wear limit specified for the trolley wire 205.

[0080] (Second variation) Figure 8 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the second modified example. As shown in Figure 8, the power generation section 11 of the induction electromotive force generator 1 of this modified example has an arc-shaped core 16, similar to the first modified example, and the arc length of the core 16 may be defined so that it is located vertically above the upper end of the gripping groove 205a of the trolley wire 205. That is, the power generation section 11 of this modified example is also provided vertically above the axis center O of the trolley wire 205.

[0081] (Third variation) Figure 9 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the third modified example. As shown in Figure 9, the power generation section 11 of the induction electromotive force generator 1 in this modified example has a roughly U-shaped core 16 that covers the upper side of the trolley wire 205.

[0082] Furthermore, in this modified example, the power generation unit 11 is also specified to have a length such that the core 16 extends downward so that it is positioned vertically above the lower end of the gripping groove 205a of the trolley wire 205.

[0083] (Fourth variation) Figure 10 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the fourth modified example. As shown in Figure 10, the power generation section 11 of the induction electromotive force generator 1 in this modified example has a V-shaped core 16 that covers the upper side of the trolley wire 205.

[0084] Furthermore, in this modified example, the power generation unit 11 is also specified to have a length such that the core 16 extends downward so that it is positioned vertically above the lower end of the gripping groove 205a of the trolley wire 205.

[0085] (Fifth variation) Figure 11 is a schematic diagram showing the configuration of an induced electromotive force generator 1 having an image sensor 30B according to a fifth modified example. The sensor unit 30 of the induced electromotive force generator 1 in this modified example may be an image sensor 30B such as a surveillance camera, as shown in Figure 11.

[0086] The induced electromotive force generator 1 here can also transmit image data information acquired by the image sensor 30B via wireless communication. In this way, the induced electromotive force generator 1 can be used as a railway safety device that utilizes the image sensor 30B, such as a surveillance camera, to detect the running status of railway vehicles 230, people entering the tracks, stones placed on the tracks, bicycles, cars, mobility scooters, fallen trees, rocks, and other obstacles at level crossings.

[0087] (Sixth variation) Figure 12 is a schematic diagram showing the configuration of an induced electromotive force generator 1 having a distance measuring sensor 30C according to the sixth modified example. The sensor unit 30 of the induced electromotive force generator 1 in this modified example may be a distance measuring sensor 30C, as shown in Figure 12. The distance measuring sensor 30C includes optical LiDAR (light radar) using laser light, RADAR (radar) using electromagnetic waves corresponding to millimeter waves, ultrasonic distance sensors using ultrasound, etc.

[0088] The induced electromotive force generator 1 here can be a railway safety device that utilizes a distance measuring sensor 30C that detects the wear condition of the trolley wire 205 and the amount of snow accumulated on the tracks based on the distance of the passing railway vehicle 230 to the pantograph 231.

[0089] Furthermore, the sensor unit 30 of the induction electromotive force generator 1 can be used for various purposes, including, in addition to temperature sensors 30A, image sensors 30B, and distance sensors 30C, for example, photoelectric sensors, torque sensors, speed sensors, acceleration sensors, pressure sensors, flow sensors, strain sensors, load sensors, axial force sensors, vibration sensors, wind speed / direction sensors, compass sensors, magnetic sensors, current sensors, radiation sensors, liquid leak sensors, leakage sensors, ground fault sensors, short-circuit sensors, liquid detection sensors, gas sensors, odor sensors, powder / granular material sensors, and / or sound sensors.

[0090] (Seventh variation) Figure 13 is a schematic diagram showing the configuration of the induction electromotive force generator 1, and Figure 14 is a schematic diagram showing the distance h between the power generation unit 11 and the trolley wire 205 in Figure 13. In this modified example, the induction electromotive force generator 1 is installed on a branch single wire 221 that is connected in parallel to the trolley wire 205, as shown in Figure 13.

[0091] The branch wire 221 is roughly U-shaped, spaced a predetermined distance above the trolley wire 205. The branch wire 221 is connected to and held by two conductive ears 222, whose ends grip the gripping groove 205a.

[0092] In other words, the alternating current or direct current flowing through the trolley wire 205 also flows through the branch single wire 221. Although the branch single wire 221 is shown in Figure 13 as being roughly U-shaped, it is not limited to this and may have any shape as long as it is spaced upward from the trolley wire 205.

[0093] The induction electromotive force generator 1 is connected to the housing 20 such that a branch single wire 221 passes through it. Therefore, the induction electromotive force generator 1 has a power generation unit 11 inside the housing 20. The housing 20 is electrically insulated from the branch single wire 221.

[0094] As shown in Figure 14, the power generation unit 11 has an annular core 16. This core 16 extrapolates the branch wire 221. That is, the branch wire 221 is inserted into the core 16. As a result, the power generation unit 11 can obtain a large induced current because the core 16 surrounds the entire outer circumference of the branch wire 221, thereby improving the efficiency of the induced electromotive force.

[0095] Furthermore, since the power generation unit 11 is positioned to surround the branch single wire 221 which is provided vertically above the trolley wire 205, it is positioned vertically above the trolley wire 205. That is, in this modified example, the lower end of the power generation unit 11 is vertically above the upper end of the trolley wire 205, and it is positioned vertically above the lower end of the trolley wire 205 with a predetermined separation distance h. Therefore, the power generation unit 11 is located vertically above the lower end of the gripping groove 205a of the trolley wire 205.

[0096] The induced electromotive force generator 1 of this modified example, configured in this manner, can, like the embodiment described above, generate an induced current from the fluctuating magnetic field 101 generated in the branch single line 221 in both AC and DC electrification systems.

[0097] (Variation 8) Figure 15 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the eighth modified example. The power generation section 11 of the induction electromotive force generator 1 in this modified example may be a rectangular core 16 surrounding the branch single wire 221, as shown in Figure 15.

[0098] (9th variation) Figure 16 is a schematic diagram showing the configuration of the power generation section 11 of the induction electromotive force generator 1 according to the ninth modified example. The power generation section 11 of the induction electromotive force generator 1 in this modified example may be a roughly U-shaped core 16 surrounding the branch single wire 221, as shown in Figure 16.

[0099] Furthermore, although the induction electromotive force generator 1 in the above embodiment is exemplified as having a power generation unit 11 that obtains induction electromotive force from the fluctuating magnetic field 101 of the single wire 100 and the trolley wire 205, this technology is not limited to this and can also be applied to rigid overhead lines used in tunnels, subways, etc.

[0100] (Tenth variation) Figure 17 is a schematic diagram showing an example of an induced electromotive force generator 1 installed in the feeder branch line 203 of a catenary suspension type overhead line equipment according to the 10th modified example. As shown in Figure 17, the induced electromotive force generator 1 of this modified example is installed in the feeder branch line 203 that electrically connects the feeder wire 201 and the trolley wire 205.

[0101] The induction electromotive force generator 1 has a configuration similar to that of the seventh modified example, and the power supply branch line 203 is connected to the housing 20 so as to pass through it. Therefore, the induction electromotive force generator 1 has a power generation unit 11 inside the housing 20, and electrical insulation is maintained between it and the power supply branch line 203.

[0102] The power generation unit 11 of the induction electromotive force generator 1 is positioned to surround the power supply branch line 203, which is located vertically above the trolley wire 205. Therefore, the power generation unit 11 is positioned vertically above the trolley wire 205. Accordingly, in this modified example, the power generation unit 11 is also positioned so that its lower end is vertically above the upper end of the trolley wire 205, and is positioned vertically above the lower end of the trolley wire 205 at a predetermined distance.

[0103] In this modified example, the induced electromotive force generator 1, configured in this manner, can, like the embodiment described above, generate an induced current in both AC and DC electrification systems, with the power generation unit 11 positioned within the fluctuating magnetic field (101) generated from the power supply branch line 203.

[0104] (11th variation) Figure 18 is a schematic diagram showing a railway vehicle using a third rail system, and Figure 19 is a schematic diagram showing the arrangement configuration of the power generation unit 11 of the induction electromotive force generator 1 in a third rail system.

[0105] As shown in Figure 18, the induced electromotive force generator 1 can also be applied to a third rail system in which railway vehicles such as subways 230 collect power from a third rail 251, which is a conductive rail for power supply, in addition to the rails 232 used for running. The third rail 251 is composed of a long conductive member and is made of a metal such as low-carbon copper with high conductivity.

[0106] The third rail 251 is supported by support insulators 252 erected on the roadbed, maintaining electrical insulation. The third rail 251 may also be installed along a wall surface via the support insulators 252. Electricity supplied from the substation 200 flows through the third rail 251. Therefore, the railway vehicle 230 receives power by collecting current through the contact of the side rail 251 with the collector shoe 235 of the current collection device, which is mounted to protrude from the lower side.

[0107] As shown in Figure 19, the induced electromotive force generator 1 may be positioned vertically below the third rail 251 at a predetermined distance from it, ensuring it does not interfere with the railway vehicle 230 and the current collector shoe 235. The power generation unit 11 can be positioned at any location around the center O of the third rail 251, within the fluctuating magnetic field 101 generated from the third rail 251, as shown in region MF, without interfering with the railway vehicle 230 and the current collector shoe 235.

[0108] Here, region MF is the range around the center O of the third rail 251, excluding the vertically upward direction along the upper surface of the side rail 251 in contact with the current collector shoe 235 and the horizontal direction on the rail 232 side which is the railway vehicle 230 side. In other words, the power generation unit 11 of this modified example can be installed in the fluctuating magnetic field 101 at a predetermined distance from the trolley wire 205 and at any position outside the region where the current collector shoe 235 contacts and moves with the side rail 251.

[0109] Furthermore, region MF includes a region where the power generation unit 11 does not come into contact with the current collector shoe 235 even when the third rail 251, which is worn down by contact with the current collector shoe 235, reaches its wear limit. The induced electromotive force generator 1 can also be applied to various ground current collection systems, such as the fourth rail system in which a return force rail (fourth rail) is laid. Moreover, the induced electromotive force generator 1 can also be applied to a configuration in which the power generation unit 11 obtains an induced current from a fluctuating magnetic field 101 generated from the power supply line of an electric mobility monorail.

[0110] (12th variation) Figure 20 is a schematic diagram showing an example of an induced electromotive force generator 1 provided near the rail 232, relating to the twelfth modification. As shown in Figure 20, the induced electromotive force generator 1 of this modification is arranged near the rail 232, which is a conductive long member.

[0111] A return current flows through the rail 232 from the wheels of the railway vehicle 230 to the substation 200. As a result, a fluctuating magnetic field 101 is generated around the rail 232. The induced electromotive force generator 1 is installed near the rail 232 such that the power generation unit 11 is positioned within the fluctuating magnetic field 101 generated from the rail 232. The induced electromotive force generator 1 can be installed either outside the rail 232 or inside the rail 232, as long as the power generation unit 11 is positioned within the fluctuating magnetic field 101.

[0112] The induced electromotive force generator 1 of this modified example, configured in this manner, can, like the embodiment described above, generate an induced current from the fluctuating magnetic field 101 generated in the rail 232 in both AC and DC electrification systems.

[0113] (13th variation) Figure 21 is a schematic diagram showing an example of an induced electromotive force generator 1 in which a plurality of power generation units 11 are electrically connected in series, relating to the 13th modification. In this modification, the induced electromotive force generator 1 may have a configuration in which a plurality of power generation units 11, in this case three, are electrically connected in series, as shown in Figure 21.

[0114] The three power generation units 11 are arranged within the region of the fluctuating magnetic field 101 generated from the conductive long members, which are the single wire 100, the trolley wire 205, the third rail 251, or the rail 232. Note that the power generation units 11 are not limited to three, but can be applied to two or more units.

[0115] The induction electromotive force generator 1 can increase the amount of induced current flowing through the coil conductor 17 in proportion to the number of power generation units 11 by connecting multiple power generation units 11 in series. Furthermore, the induction electromotive force generator 1 can install multiple power generation units 11 at predetermined intervals along the longitudinal direction of a conductive elongated member.

[0116] (14th variation) Figure 22 is a schematic diagram showing an example of an induced electromotive force generator in which multiple power generation units are electrically connected in series, relating to the 14th modification. In this modification, the induced electromotive force generator 1 may have a configuration in which multiple, in this case three, power generation units 11 are electrically connected in series, as shown in Figure 22.

[0117] The three power generation units 11 are also arranged within the region of the fluctuating magnetic field 101 generated from the conductive long members, which are the single wire 100, trolley wire 205, third rail 251, or rail 232, similar to the 13th modified example. Furthermore, similar to the 13th modified example, the power generation units 11 are not limited to three, but can be applied to two or more units.

[0118] The induction electromotive force generator 1 can increase the induced electromotive force (voltage) generated in the coil conductor 17 in proportion to the number of power generation units 11 by connecting multiple power generation units 11 in series. Furthermore, similar to the 13th modified example, the induction electromotive force generator 1 can also have multiple power generation units 11 installed at predetermined intervals along the longitudinal direction of a conductive elongated member.

[0119] The invention described in the above embodiments is not limited to those embodiments and their respective modifications, and various modifications can be made in the implementation stage without departing from the gist of the invention. Furthermore, the above embodiments and their respective modifications include inventions at various stages, and various inventions can be extracted by appropriate combinations of the multiple constituent elements disclosed.

[0120] For example, if the problem described can be solved and the effects described can be obtained even if some of the constituent elements shown in the embodiment are deleted, then the configuration with the deleted constituent elements can be extracted as an invention. [Explanation of symbols]

[0121] 1...Induced electromotive force generator 10…Power generation unit 11…Power Generation Department 12…Power Integration Unit 13…Energy storage circuit 14…Energy storage circuit 15…Memory 16... Core 17... Coil wire 18…Bracket 20…Cabinet 21... Year 30...Sensor section 30A...Temperature sensor 30B...Image sensor 30C... Distance measuring sensor 31… Cable 40... Communications Department 100... Single track 101...Fluctuating magnetic field 200... Substation 201...Flight line 202... Return Line 203... Power supply branch line 204...suspension line 205... Trolley wire 205a...Gripping groove 206... Utility pole 207... Feed wire bracket 208... Suspension insulator 209... Overhead wire bracket 210... Long-stemmed insulator 220... Feed year 221... Branch single track 222... Conductive Ear 230... Railway vehicles 231...Pantograph 232... rails h...Separation distance O…Axis center (center)

Claims

1. A power generation unit that supplies power to a current collector that makes contact while moving and / or obtains an induced electromotive force from a fluctuating magnetic field generated by a conductive elongated member to which the power is returned from the wheels, A power integrator that integrates power to drive electrical components using the induced electromotive force obtained by the above-mentioned power generation unit, It has, An induced electromotive force generating device characterized in that the power generation unit is arranged in a region within the fluctuating magnetic field that does not interfere with the current collector that slides on the conductive elongated member.

2. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is positioned away from the current collector, with the single wire in between.

3. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed at a position away from the current collector from the axial center of the conductive elongated member.

4. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from the trolley wire that supplies driving power to the electric mobility device to obtain the induction electromotive force.

5. The induction electromotive force generator according to claim 4, characterized in that the electric mobility includes a railway vehicle, a trolleybus, or a tramway.

6. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from a third rail that supplies driving power to an electric mobility device to obtain the induction electromotive force.

7. The induction electromotive force generator according to claim 6, characterized in that the electric mobility includes a railway vehicle, a trolleybus, or a tramway.

8. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from the conductive elongated member to which an alternating current for driving an electric mobility device is supplied, thereby obtaining the induced electromotive force.

9. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from the conductive elongated member to which a direct current for driving an electric mobility device is supplied, thereby obtaining the induced electromotive force.

10. The induction electromotive force generating device according to claim 9, characterized in that the power generation unit obtains the induction electromotive force by the fluctuating magnetic field generated in the conductive elongated member due to the input fluctuation of the DC current when the current collector that slides on the electric elongated member passes over it.

11. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from a power supply branch line for supplying driving power to an electric mobility device to the electric long member, thereby obtaining the induction electromotive force.

12. The induction electromotive force generating device according to claim 1, characterized in that the power generation unit is disposed within the fluctuating magnetic field generated from the rails through which electric current is returned from the wheels of the electric mobility device, thereby obtaining the induced electromotive force.

13. The induction electromotive force generating device according to claim 1, characterized in that a plurality of the power generation units are electrically connected in series.

14. The induction electromotive force generating device according to claim 1, characterized in that a plurality of the power generation units are electrically connected in parallel.

15. The induction electromotive force generating device according to claim 1, characterized in that the electrical components include a sensor unit.

16. The induction electromotive force generating device according to claim 15, characterized in that the sensor unit includes a temperature sensor for detecting the temperature of a wiring fitting for supplying power to the conductive long member.

17. The induction electromotive force generating device according to claim 15, characterized in that the sensor unit includes an image sensor.

18. The induction electromotive force generating device according to claim 15, characterized in that the sensor unit includes a distance measuring sensor.

19. The induction electromotive force generating device according to claim 14, characterized in that the sensor section includes a photoelectric sensor, a torque sensor, a speed sensor, an acceleration sensor, a pressure sensor, a flow sensor, a strain sensor, a load sensor, an axial force sensor, a vibration sensor, a wind speed / wind direction sensor, a compass sensor, a magnetic sensor, a current sensor, a radiation sensor, a liquid leak sensor, a leakage sensor, a ground fault sensor, a short circuit sensor, a liquid detection sensor, a gas sensor, an odor sensor, a powder / granular material sensor and / or a sound sensor.

20. The induced electromotive force generating device according to claim 15, characterized in that the electrical components include a communication unit that wirelessly transmits physical-related information detected by the sensor unit to a higher-level system.

21. A self-generating monitoring device for electric mobility, characterized by including the induction electromotive force generating device described in any one of claims 1 to 20.

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