JP2020192976A - Power supply system - Google Patents

Abstract

To provide a contact type power supply system which can transmit large current capable of performing quick charge, secures safety and achieves a low cost without wear.SOLUTION: A power supply system includes: a power transmission communication rail 1; and a conveyance body 2 which is movable on the rail. The power transmission communication rail 1 has an internal conductor 11 which is made of DC or AC electric wires, an external conductor 12 which is arranged to be insulated from the internal conductor 11 so as to cover the internal conductor 11, and a power transmission electrode 19 which is insulated and arranged in at least a part of an outer wall surface of the external conductor 12 and transmits power from the internal conductor 11 to the conveyance body 2. The conveyance body 2 has a pair of power reception electrodes 21 which are arranged to face the power transmission electrode 19 and the external conductor 12, respectively, and receive power transmitted from the power transmission electrode 19 and a control section 26 which executes control for making the pair of power reception electrodes 21, the power transmission electrode 19, and the external conductor 12 into a contact state or a non-contact state at a prescribed timing.SELECTED DRAWING: Figure 3

Description

The present invention relates to a power supply system.

Trolley lines have traditionally been widely used as lines for transmitting electric power. However, when a trolley wire is used, the pantograph moves with contact pressure with respect to the overhead wire, so that abrasion powder is scattered and the pantograph and the overhead wire need to be replaced regularly, which is environmentally and costly. There's a problem. In addition, there is a risk of electric shock due to the use of bare metal wires. For this reason, the trolley wire is usually installed in a high place out of reach of humans. However, along with this, it is necessary for workers to work at high places, which leads to an increase in maintenance costs.
For this reason, non-contact type power feeding technology is being actively studied as an alternative technology, and for example, there are a magnetic field type power feeding technology and an electric field type power feeding technology.
Of these, the magnetic field type power supply technology has already been put into practical use and is used in some production lines and the like.
In addition, research aimed at improving the performance of electric field type power supply technology is being actively pursued. In the study of the electric field method, the concept of a coaxial line with a switch has emerged, and the applicant has already applied for it (see, for example, Patent Document 1). In addition, quick battery charging technology is also advancing.

However, considering the application target of the technology, for example, a factory production line does not necessarily require a non-contact power supply technology, but rather a technology for quick charging, a technology for ensuring safety, and wear and tear. Many are calling for technology to prevent cost increases.

Japanese Patent Application No. 2018-26824 specification and drawings

The present invention has been made in view of such a situation, and provides a contact-type power supply system capable of transmitting a large current that can be charged quickly, ensuring safety, and realizing low cost without wear and tear. The purpose is to provide.

The power supply system of the present invention
In a power supply system including a power transmission line that transmits power from a power source and a carrier that can move the power transmission line by using the power supplied from the power transmission line.
The power transmission line is
With an internal conductor consisting of DC or AC wires,
An outer conductor arranged to be insulated from the inner conductor so as to cover the inner conductor,
A power transmission electrode that is insulated and arranged on at least a part of the outer wall surface of the outer conductor and transmits electric power from the inner conductor to the carrier.
With
The carrier is
A pair of power receiving electrodes arranged so as to face each of the power transmission electrode and the outer conductor and receiving power transmitted from the power transmission electrode.
A contact control unit that executes control that the power receiving electrode pair and the power transmission electrode and the outer conductor are in a contact state or a non-contact state at a predetermined timing.
To be equipped.

According to the present invention, it is possible to provide a contact-type power supply system in which safety is ensured, a large current that can be quickly charged can be transmitted, and a low cost is realized without wear and tear.

It is a figure which shows various processes realized by the power transmission communication rail which constitutes this system applied in a factory, and a carrier. It is a figure which shows the position of a power receiving electrode. It is a figure which shows an example of the structure of the power supply system which concerns on one Embodiment of this invention. It is a figure which shows an example of the structure of the power supply system which concerns on one Embodiment of this invention. It is a figure which shows the state of attachment / detachment of the transport body among the specific examples of the transport body which constitutes the power supply system of FIG.

A power transmission device according to an embodiment of the power supply system of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments.

<Premise>
As described above, the power feeding technology includes a contact type and a non-contact type. The contact type includes, for example, a trolley wire, and the non-contact type includes a magnetic field method and an electric field method.

(Contact type)
Of the contact type, the trolley wire is a power feeding technology used for, for example, a pantograph of a train. However, in the case of a trolley wire, since a certain pressure is applied to the overhead wire to run the trolley wire in a state where the contact resistance is lowered, both the pantograph and the overhead wire are worn out. Therefore, it is necessary to replace the pantograph and the overhead wire at regular intervals. As a result, the cost of replacement will be enormous.

(Non-contact type)
Of the non-contact type, the magnetic field method is a power feeding technology in which a high-frequency current is passed through two parallel wires and the magnetic field generated between the wires is guided to a pickup coil by a yoke (ferrite) to obtain an electromotive force. However, in the case of the magnetic field method, although it has been put into practical use in the past, there is a drawback that the frequency cannot be increased for the following reasons.
That is, in the case of the magnetic field method, (1) when the electric power required by passing a high-frequency current through two parallel wires is passed, a radiated electromagnetic field exceeding a reference value specified by a law is generated. Therefore, it is driven at a frequency lower than the frequency range specified by law. Technically, it is possible to increase the electromotive force by increasing the high frequency of the current, but it is difficult to do so by law. (2) Since the frequency characteristic of the magnetic permeability of the yoke material is poor, the magnetic permeability decreases when the current is increased in frequency. (3) When the current is increased in frequency, the resistance of the overhead wire and the coil increases due to the skin effect and the proximity effect.
For the above reasons, although the magnetic field method has been put into practical use, it is difficult to expect further development in the future.

Of the non-contact type, the electric field method can solve the problems of the magnetic field method. However, in the case of the electric field method, since the distance between the electrodes cannot be increased, the problem is how to drive the distance while keeping the minute distance between the electrodes constant.
Under such circumstances, the applicant has already proposed, for example, a feather touch type electrode, a magnet attraction type electrode, and the like to solve the above-mentioned electric field type problem. Furthermore, the applicant has already proposed, for example, a coaxial line system with a slit and a coaxial line system with a switch as a method for reducing electromagnetic wave radiation when the electric field method is adopted. For example, the coaxial line system with a switch has a completely sealed structure and is resistant to rain and dust, so it is expected as a line that can be used outdoors.

As described above, there are contact type and non-contact type in the power feeding technology, and each of them has the above-mentioned problems.
The power supply technology adopted in the power supply system of the present invention (hereinafter referred to as "this system") has the above-mentioned problems of the contact type (for example, trolley wire) and the problems of the non-contact type (for example, magnetic field type and electric field type). It is a power supply technology that can solve all of these problems.

<Static carrier>
FIG. 1 is a diagram showing various processes realized by a power transmission communication rail and a carrier that constitute this system applied in a factory.
As a process realized by this system, for example, as shown in FIG. 1, there are a rail-to-rail transfer process, a transshipment / standby process, and a processing / assembly process. Then, in each step, there is a state in which the carrier 2 is stationary (hereinafter, referred to as a “stationary state”).

That is, as shown in FIG. 1, when the transport body 2 is moved on the power transmission communication rail 1 arranged in the factory, the semi-finished product is mounted on the transport body 2 and moved. However, the carrier 2 is not in a state of being constantly moving on the power transmission communication rail 1 (hereinafter, referred to as a “moving state”), and may stop and become stationary.

On the left side of FIG. 1, a rail-to-rail transfer process consisting of two patterns is illustrated. Here, the "rail-to-rail transfer process" refers to a process in which the carrier 2 transfers between the power transmission communication rails 1. Among these, in the inter-rail transfer process shown on the upper side, an inter-rail transfer carriage for transferring between two power transmission communication rails 1 installed in parallel is shown. The inter-rail moving trolley transfers the carrier 2 to the desired power transmission communication rail 1 while moving in parallel with the power transmission communication rail 1 with the carrier 2 mounted therein.
Further, in the inter-rail moving process shown on the lower side, an inter-rail moving rotary table arranged at a position where the two power transmission communication rails 1 intersect is shown. The inter-rail moving rotary table rotates with the carrier 2 moving on one of the power transmission and communication rails 1 mounted on it, and transfers the carrier 2 to the other power transmission and communication rail 1.
Here, the carrier 2 mounted on the inter-rail moving trolley or the inter-rail moving rotary table is on the inter-rail moving trolley or on the inter-rail rotating table while the inter-rail moving trolley is moving or the inter-rail moving rotary table is rotating. Each becomes stationary above.

The transshipment / standby process is illustrated in the upper right of FIG. The transshipment / standby process is a process of transferring a semi-finished product loaded on a transport body 2 moving on a power transmission communication rail 1 to an AGV (automated guided vehicle) or the like. In this transshipment / standby process, transshipment work is performed by a transshipment robot. At the time of this transshipment work, the transshipment robot grabs the semi-finished product loaded on the carrier 2 and transfers it to an AGV (automated guided vehicle) or the like. However, when the transshipment robot grabs the semi-finished product, the power transmission communication rail 1 The carrier 2 on the top stops and becomes stationary.
Further, when a semi-finished product waiting to be transferred to an AGV (automated guided vehicle) or the like causes a stagnation on the power transmission communication rail 1, the transport bodies 2 temporarily in a stationary state form a line. Will exist.

The processing / assembling process is illustrated in the lower right of FIG. The processing / assembling process is a process of processing and assembling a semi-finished product. In this processing / assembling process, processing / assembling work is performed by a processing / assembling robot. During this processing / assembling work, the processing / assembling robot processes the semi-finished products loaded on the carrier 2 and assembles the semi-finished products. At that time, the power transmission communication rail 1 The carrier 2 existing above is in a stationary state.

As described above, the carrier 2 existing on the power transmission communication rail 1 of the factory is not always in the moving state on the power transmission communication rail 1, and there is a time zone in which the carrier 2 is stopped and stationary.
The other features of the stationary carrier 2 are as shown in FIG.

<Power receiving electrode position>
FIG. 2 is a diagram showing the positions of the power receiving electrodes.

The relationship between the power receiving electrode position indicated by ascending (Up) and descending (Down), time (t), and velocity (V) can be represented by the three-dimensional graph shown in FIG. That is, the carrier 2 existing on the power transmission communication rail 1 becomes a stationary state (V = 0) at various timings. Here, considering the combination with the battery technology capable of quick charging, which has been actively developed in recent years, when the carrier 2 is stopped and becomes a stationary state, the power receiving electrode is lowered and the power is transmitted. A method of contacting with the side electrodes can be adopted. The feature of this method is that it is a contact type rather than a non-contact type. Therefore, the inverter required for the non-contact method is not required. This facilitates high power transmission with a simple configuration. As a result, quick charging becomes possible.
Further, the difference from the conventional contact method is that when the carrier 2 is in a stationary state, the power receiving electrode is lowered to bring it into contact with the power transmission side electrode, and the power receiving electrode is brought into contact immediately before the carrier 2 starts moving (running). Is a point to raise (Up) to make non-contact. Due to this difference, the overhead wire does not move under the contact pressure as in the conventional contact method. As a result, wear of the electrodes is eliminated.
When the wear of the electrodes is eliminated, it is not necessary to replace the electrodes, or the interval between electrode replacements can be made extremely long. As a result, the maintenance cost can be significantly reduced. Furthermore, since the discharge of dust due to contact wear is eliminated, this system can be installed in a place where contamination becomes a problem.

<Basic configuration>
FIG. 3 shows a block diagram showing the function of the power transmission communication rail 1 together with a cross-sectional view cut at the center position of a plane parallel to the longitudinal direction of the power transmission communication rail 1.
FIG. 4 shows a block diagram showing the functions of the power transmission communication rail 1 and the carrier 2 together with a cross-sectional view cut along a plane orthogonal to the longitudinal direction of the power transmission communication rail 1.

As shown in FIGS. 3 and 4, the power transmission communication rail 1 includes an inner conductor 11 (bus bar) and an outer conductor 12 having a GND potential that covers the inner conductor 11 and draws current from the DC wiring at a necessary position to constantly disconnect the switch. It is connected to the power transmission electrode 19 via the box SB. A dielectric material 13 is arranged between the inner conductor 11 and the outer conductor 12.

The power transmission communication rail 1 includes a power supply 15, a gate driver 16, a switch control unit 17, and a short-circuit detection unit 18 in the switch box SB. The switch control unit 17 receives the signal transmitted from the actuator 23 of the carrier 2 by the sensor, determines decoding, connects the switch, and executes control to transmit the electric power from the internal conductor 11 to the power transmission electrode 19. ..

The short circuit detection unit 18 arranged in the switch box SB constantly monitors whether or not the power transmission electrode 19 is short-circuited with the surrounding external conductor 12. Therefore, for example, when a conductive wire or plate is caught on the power transmission electrode 19 and the outer conductor 12, the short circuit detection unit 18 determines that the circuit is short and notifies the fact. In this case, even if the carrier 2 arrives on the power transmission electrode 19, the pair of power receiving electrodes 21 is prohibited from descending, and the power transmission switch is not turned on.

The carrier 2 has a pair of power receiving electrodes 21 facing each other of the power transmission electrode 19 and the outer conductor 12, and moves (runs) on the power transmission communication rail 1. Therefore, a guide rail GR is attached to the side surface of the carrier 2. The transport body 2 moves by aligning the guide wheel GC with the guide rail GR and pressing the drive wheel DT against the side surface of the outer conductor 12.
In the carrier 2, the control unit 26 controls the drive of the power receiving circuit 22, the actuator 23, the power storage circuit 24, the load 25, the communication unit 27, the sensor 28, the camera C, and the elevating unit UD. For example, the control unit 26 recognizes the power transmission electrode 19 and a signboard (not shown) based on the data of the image captured by the camera C, and stops the carrier 2 on the power transmission electrode 19 to put it in a stationary state. Take control. Further, the control unit 26 controls the drive of the actuator 23 and lowers the power receiving plate P in the direction of the arrow Y2 in FIG. 4, so that the pair of the power receiving electrodes 21 becomes the power transmission electrode 19 and the outer conductor 12. Performs contact control. As a result, the carrier 2 can obtain electrical contact and can be supplied with electric power.

The carrier 2 receives electric power from the power transmission communication rail 1 and stores electric power. Specifically, when the pair of the power receiving electrodes 21 receives the power from the power transmission communication rail 1, the power is stored in the power storage circuit 24 via the telescopic line L and the power receiving circuit 22. The electric power stored in the electricity storage circuit 24 is used, for example, as the electric power required to drive the load 25, the control unit 26, the communication unit 27, the sensor 28, the camera C, and the elevating unit UD.
The control unit 26 of the transport body 2 pulls up the power receiving plate P at the timing when the power storage in the power storage circuit 24 is completed or the timing immediately before the transport body 2 starts moving to obtain a pair of the power receiving electrodes 21 in FIG. The control of raising (Up) in the direction of the arrow Y3 is executed. As a result, the carrier 2 can bring the pair of the power receiving electrodes 21 into contact with the power transmission electrode 19 and the outer conductor 12 only when the carrier 2 is stopped and stationary. That is, when the carrier 2 is in the moving state, the pair of the power receiving electrodes 21 and the power transmission electrode 19 and the outer conductor 12 can be brought into a non-contact state. As a result, the carrier 2 can move on the power transmission communication rail 1 without causing wear of the electrodes and the like.

Further, as shown in FIG. 3, the skirt S and the brush B are attached to the transport body 2 at the edge of the transport body frame F in the traveling direction (direction of the arrow Y1). As a result, the carrier 2 can move in the direction of the arrow Y1 while discharging the foreign matter that may exist on the power transmission communication rail 1 to the outside of the rail. With the above functions, it is possible to prevent accidents due to short circuits. If a situation occurs in which conductive foreign matter cannot be removed even with the above functions, the communication function is used to identify the location where the short circuit has occurred and then notify the outside to a cleaning robot (not shown). Or call a cleaner. As a result, the short circuit can be eliminated.

Further, a leakage coaxial line LCX is arranged on the power transmission communication rail 1. As a result, the carrier 2 and the external device (not shown), the carrier 2 and the carrier 2 and the switch box SB (transmission communication rail 1) are passed through the antenna ANT mounted on the carrier 2 and the communication unit 27. ) Can communicate with each other.
As a result, the system can be provided with IoT (Internet of Things) properties, and communication can be performed anywhere on the power transmission communication rail 1. The switch box SB of the power transmission communication rail 1 also has a communication function. Therefore, communication between the switch box SB and the external server (not shown) via the carrier 2 and the leaky coaxial line LCX becomes possible.

As shown in FIGS. 3 and 4, the power transmission communication rail 1 includes a DC current path including an inner conductor 11 (busbar) and an outer conductor 12. The outer conductor 12 is made of extruded aluminum material or the like, and is insulated from the inner conductor 11 via a dielectric material. A positive voltage is applied to the inner conductor 11 from the outside. The outer conductor 12 has a GND potential.
Although not shown, the positive potential bus bar and the negative potential bus bar may be separated by a dielectric material and arranged in parallel in the outer conductor 12 (parallel two-wire system). In this case, it is also possible to connect the positive voltage terminal and the negative voltage terminal from the outside to the positive and negative bus bars, respectively, and adopt a method in which the outer conductor 12 has a GND potential.

As shown in FIG. 4, a groove (recess) is provided on the upper surface of the outer conductor 12, and the switch box SB and the utility box UB are inserted into the groove. The specific positions for installing the switch box SB and the utility box UB in the groove can be changed later as desired, but the switch box SB is installed at a position where the carrier 2 stops and becomes stationary. Will be done. For example, the processing / assembling robot in the processing / assembling process of FIG. 1 can change the position of the switch box SB according to the position where the transport body 2 is stationary in order to process or assemble a semi-finished product.

The switch box SB has a case made of a dielectric material. Therefore, the case is screw-fixed to the connection terminal 14 and the outer conductor 12 attached to the bus bar. As a result, the switch box SB can obtain an electrode having a positive potential and an electrode having a GND potential.
As a result, the switch box SB can obtain the power required to drive the switch control unit 17, the short-circuit detection unit 18, and the camera C. As a result, the gate driver 16 of the switch can be controlled. Further, since the switch box SB is provided with the reflector M, communication can be performed between the leaky coaxial line LCX arranged on the side surface of the groove and the carrier 2.
Further, a power transmission electrode 19 is attached to the upper surface of the switch box. Therefore, the internal conductor 11 and the power transmission electrode 19 are connected via the switch box SB.

The utility box UB is the same as the switch box SB in that it is provided with a reflector M (not shown) that connects the electromagnetic waves from the leaky coaxial line LCX to the outside, but has no other function.
However, since a space is formed inside the utility box UB and power can be supplied and communication is possible, various functions can be added to the power transmission communication rail 1. Specifically, for example, various sensors such as a temperature sensor can be installed in a space in the utility box UB to collect and distribute data related to temperature.

Further, as described above, since the switch box SB and the utility box UB can be installed at arbitrary positions on the power transmission communication rail 1, for example, the switch box SB and the utility box UB can be installed at the positions shown in FIG. it can.

As shown in FIG. 3, the transport body 2 stops at the timing when its own power receiving electrode comes over the power transmission electrode 19, becomes a stationary state, and lowers the power receiving electrode 21. As a result, the power transmission electrode 19 and the outer conductor 12 of the power transmission communication rail 1 and the power reception electrode 21 come into contact with each other. Here, the method of guiding the carrier 2 onto the power transmission electrode 19 is not limited to the camera C described above.

Further, as a method of notifying the switch box SB side that the carrier 2 has come on the power transmission electrode, for example, the following method can be adopted.
That is, when the magnetic field method is used, a high frequency of several kHz is passed through the actuator 23 on the carrier 2 side by using a coil. Then, a coil is used for the sensor in the switch box SB on the power transmission communication rail 1 side. As a result, the arrival of the carrier 2 can be notified by electromagnetic induction.

Further, in another magnetic field method, a permanent magnet may be used as the actuator 23, and a magnetic sensor such as a reed switch or a Hall element may be used as the sensor for detection. In the case of the magnetic method, it is preferable to use a non-magnetic material as the power receiving electrode pair and the power transmission electrode.

When light is used, an LED (light emitting diode) may be used as the actuator 23, and a photodetector element may be used as the sensor. In this case, consideration is given to light transmission through the power receiving electrode 21 and the power transmitting electrode 19.

In addition, a method using an ultrasonic element, a method using a heat ray, and the like can be selected.
Further, by installing the camera C in the switch box SB on the power transmission communication rail 1 side or in the outer peripheral portion and using the camera C as a sensor, it is possible to recognize that the carrier 2 has come on the power transmission electrode 19. You may.

The carrier 2 receives electric power and has a control unit 26 and a sensor 28 by itself, so that autonomous control becomes possible. Based on an external command, the carrier 2 selects a route or the like by itself and proceeds with assembling the product. The transport body 2 needs to communicate with the processing / assembling robot at the timing when it reaches a predetermined position. Therefore, the carrier 2 is provided with a communication unit 27. In this case, it is preferable that the carrier 2 communicates only with the processing / assembling robot and does not interfere with peripheral devices. Therefore, the carrier 2 performs communication using, for example, optical communication technology.
The electric power stored in the carrier is distributed and used as electric power for exerting various functions as described above. For example, it is also used as electric power for a drive motor.
Although not shown, it is assumed that the fuse or breaker is placed at an appropriate position in this system. As a result, it is possible to prevent the bus bar itself from being short-circuited with the GND due to a defect in various functions.
Further, when this system is used outdoors, a lightning strike function can be provided on the power transmission electrode 19 and the like.
Other features of the configuration of the power supply system according to the embodiment of the present invention are as shown in FIGS. 3 and 4.

FIG. 5 is a diagram showing a state of attachment / detachment of the carrier among specific examples of the carrier constituting the power supply system of FIG.

As shown in FIG. 5, in the transport body 2, the power receiving plate P is pulled up by the elevating portion UD to raise the power receiving plate P. As a result, the pair of the power receiving electrodes 21 is in a non-contact state with the power transmission electrode 19 and the outer conductor 12. As a result, the carrier 2 can freely move on the power transmission communication rail 1.
Further, at the time of maintenance of the carrier 2, the carrier 2 can be removed from the power transmission communication rail 1 by flipping up the traveling wheel cover TC, the guide wheel GC, the drive wheel DT, etc. in the direction of the arrow Y4 by the hinge H. ..
By having the above-mentioned configuration, the carrier 2 can move on the power transmission communication rail 1.

According to this system having the configuration described above, for example, the following effects can be expected.
That is, according to this system, (1) DC power transmission or commercial frequency power transmission can be performed, so that the cost of power system equipment can be reduced. (2) Since it is not subject to the regulations of related laws and regulations such as the Radio Law, it will be easy to commercialize and install. (3) Contact-type power feeding technology can be used. Therefore, as compared with the non-contact type power feeding technology, the inverter and the high frequency line required for the non-contact type power feeding technology are not required. As a result, cost reduction can be achieved. In addition, high power transmission becomes possible. (4) Since there is no wear of the electrodes, maintenance costs can be reduced. In addition, since cutting powder and the like are not emitted, there is no adverse effect on the environment and cleaning work is not required. (5) When the carrier 2 receives power in a stationary state, the electrodes come into contact with each other and the position can be fixed. Therefore, when the robot processing is performed, it is possible to prevent the position displacement in the state where the semi-finished product is fixed to the carrier 2. (6) Since the internal conductor 11 (busbar) for power transmission on the line is not exposed as compared with the conventional contact method, it is possible to prevent human contact. As a result, safety is extremely high. Furthermore, even if a liquid such as water is splashed, the effect is small. (7) The power transmission electrode 19 of the power transmission communication rail 1 is normally in the OFF state. Therefore, it is safe even if the power transmission communication rail 1 is installed in the vicinity of a person. When the carrier 2 arrives, the power transmission electrode is turned on, but since the size of the power transmission electrode 19 is smaller than the size of the carrier 2, the power transmission electrode 19 is completely hidden under the carrier 2. Therefore, it is possible to prevent human contact. As a result, an electric shock accident can be prevented.
That is, this system is a highly practical contact-type power supply system that ensures safety, realizes low cost without wear, and is capable of high-power power transmission.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention. Is.

For example, in FIGS. 4 to 5, tires are drawn as an example of a drive system for a carrier, but the present invention is not limited to this. Any drive system can be adopted depending on the application. For example, a rack & pinion gear system or a linear motor system may be adopted.

Further, for example, in the above-described embodiment, an example of a one-dimensional linear system is shown, but the present invention is not limited to this. Transmission electrodes, switches, and control units are placed anywhere on a plane or quasi-plane such as a floor, wall, or ceiling, and a two-dimensional power wiring and communication mechanism are provided behind the plane or quasi-plane. You can also imagine a two-dimensional system.

Further, for example, in a covered space or a closed space that cannot be approached by a person, multiple power transmission lines (for example, +,-, GND) are exposed and only the vertical mechanism of the power receiving electrode is used. You may. In this case, it is possible to supply power to the stationary carrier at a free position on one dimension.

Further, for example, in the above-described embodiment, the power receiving electrode of the stationary carrier moves in a predetermined direction and comes into contact with the power transmission electrode and the outer conductor of the power transmission line, but the present invention is not limited to this. At the timing when the carrier is in a stationary state, the power receiving electrode comes into contact with the power transmission electrode and the outer conductor, and when the carrier is in the moving state, the condition for separating the power receiving electrode and the power transmission electrode and the outer conductor is satisfied. Any configuration can be adopted. For example, although not shown, when the carrier becomes stationary at a predetermined position on the power transmission line, the transmission electrode and the outer conductor at that position move in a predetermined direction and come into contact with the power receiving electrode on the carrier side. You can also do it.

Summarizing the above, the power supply system to which the present invention is applied suffices to have the following configuration, and various various embodiments can be taken.
That is, the power supply system to which the present invention is applied is
A power transmission line that transmits power from a power source (for example, the power transmission communication rail 1 in FIG. 3) and a carrier that can move the power transmission line using the power supplied from the power transmission line (for example, FIG. 3). In the power supply system including the carrier 2) and
The power transmission line is
An internal conductor composed of a DC or AC electric wire (for example, the internal conductor 11 (busbar) in FIG. 3) and
An outer conductor (for example, the outer conductor 12 in FIG. 3) arranged so as to cover the inner conductor so as to be insulated from the inner conductor.
A power transmission electrode (for example, a power transmission electrode 19 in FIG. 3) that is insulated and arranged on at least a part of the outer wall surface of the outer conductor and transmits electric power from the inner conductor to the carrier.
With
The carrier is
A pair of power receiving electrodes (for example, a pair of power receiving electrodes 21 in FIG. 3) that are arranged so as to face each of the power transmission electrode and the outer conductor and receive power transmitted from the power transmission electrode.
Control that the power receiving electrode pair and the power transmission electrode and the outer conductor are in a contact state or a non-contact state at a predetermined timing (for example, the timing when the carrier 2 is stopped and becomes a stationary state) (for example, the power receiving plate P A contact control unit (for example, control unit 26 in FIG. 3) that executes (elevation) and
To be equipped.

In addition, the carrier is
Further provided with an elevating unit (for example, the elevating unit UD in FIG. 3) for moving the power receiving electrode pair in a predetermined direction under the control of the contact control unit.
The contact control unit
At the predetermined timing, when the moving body faces the power transmission electrode and the outer conductor and the power receiving electrode pair, the power receiving electrode pair is placed on the elevating part in the direction of the power transmission electrode and the outer conductor. Is executed to bring the power transmission electrode into contact with the outer conductor,
Immediately before the carrier starts moving, the power transmission electrode pair and the power receiving electrode pair in contact with the power transmission electrode and the outer conductor are moved to the elevating part in a direction away from the power transmission electrode and the outer conductor. Therefore, control for making the power transmission electrode and the outer conductor non-contact can be executed.

Further, the carrier further includes an actuator (for example, the actuator 23 in FIG. 3) that transmits the presence or absence of movement of the own machine by a predetermined signal.
The power transmission line is
A sensor that detects the signal from the actuator (for example, the switch control unit 17 in FIG. 3) and
While the sensor is detecting the signal, control is executed to transmit electric power from the inner conductor to the power transmission electrode, and while the signal is not detected by the sensor, the inner conductor is said to be said. A power transmission control unit (for example, the switch control unit 17 in FIG. 3) that executes control for prohibiting power transmission to the power transmission electrode, and
Can be further prepared.

As a result, it is possible to provide a contact-type power supply system in which safety is ensured, a large current that can be charged quickly can be transmitted, and the cost is low without wear.

Further, the power transmission electrode is
When the carrier is present on the power transmission electrode, it is a size that cannot be visually recognized from the outside.
The power transmission control unit can further perform control for prohibiting power transmission from the inner conductor to the power transmission electrode when the carrier is not present on the power transmission electrode.

As a result, it is possible to prevent a person from accidentally contacting the power transmission electrode and receiving an electric shock.

The power transmission line is
A detection unit (for example, a short-circuit detection unit 18 in FIG. 3) that detects a state in which the power transmission electrode is short-circuited with a surrounding external conductor as a short circuit.
When the short circuit is detected by the detection unit, a notification unit (for example, the short circuit detection unit 18 in FIG. 3) that notifies the outside to that effect,
With more
The power transmission control unit
When the short circuit is detected by the detection unit, control for prohibiting power transmission from the internal conductor to the power transmission electrode can be executed.

As a result, an accident due to a short circuit can be prevented.

In addition, the carrier is
A skirt (for example, skirt S in FIG. 3) and a brush (for example, brush B in FIG. 3) capable of discharging foreign matter existing on the surface of the power transmission line in the traveling direction to the outside of the power transmission line can be further provided. ..

As a result, the carrier can move while discharging foreign matter that may exist on the surface of the power transmission line to the outside of the rail, so that normal operation can be maintained.

1 ... Transmission communication rail, 2 ... Conveyor, 11 ... Internal conductor, 12 ... External conductor, 13 ... Dielectric material, 14 ... Connection terminal, 15 ... Power supply, 16 ... Gate driver, 17 ... Switch control unit, 18 ... Short circuit detection unit, 19 ... Transmission electrode, 21 ... Power receiving electrode, 22 ... Power receiving circuit, 23 ... Actuator, 24 ... Power storage circuit, 25 ... Load, 26 ... Control unit, 27 ... Communication unit, 28 ... Sensor, UD ... Elevating part, ANT ... Antenna, L ... Expansion and contraction Railroad track, C ... camera, F ... conductor frame, P ... power receiving plate, SB ... switch box, UB ... utility box, S ... skirt, B ... brush, M・ ・ ・ Reflector, LCX ・ ・ ・ Leakage coaxial line, DT ・ ・ ・ Drive wheel, GC ・ ・ ・ Guide wheel, GR ・ ・ ・ Guide rail, TC ・ ・ ・ Running wheel cover, H ・ ・ ・ Hinge

Claims (6)

In a power supply system including a power transmission line that transmits power from a power source and a carrier that can move the power transmission line by using the power supplied from the power transmission line.
The power transmission line is
With an internal conductor consisting of DC or AC wires,
An outer conductor arranged to be insulated from the inner conductor so as to cover the inner conductor,
A power transmission electrode that is insulated and arranged on at least a part of the outer wall surface of the outer conductor and transmits electric power from the inner conductor to the carrier.
With
The carrier is
A pair of power receiving electrodes arranged so as to face each of the power transmission electrode and the outer conductor and receiving power transmitted from the power transmission electrode.
A contact control unit that executes control that the power receiving electrode pair and the power transmission electrode and the outer conductor are in a contact state or a non-contact state at a predetermined timing.
To prepare
Power supply system. The carrier is
Further provided with an elevating unit that moves the power receiving electrode pair in a predetermined direction under the control of the contact control unit.
The contact control unit
At the predetermined timing, when the moving body faces the power transmission electrode and the outer conductor and the power receiving electrode pair, the power receiving electrode pair is placed on the elevating part in the direction of the power transmission electrode and the outer conductor. Is executed to bring the power transmission electrode into contact with the outer conductor,
Immediately before the carrier starts moving, the power transmission electrode pair and the power receiving electrode pair in contact with the power transmission electrode and the outer conductor are moved to the elevating part in a direction away from the power transmission electrode and the outer conductor. To execute control to make the power transmission electrode and the outer conductor non-contact.
The power supply system according to claim 1. Further, the carrier further includes an actuator that transmits the presence or absence of movement of the own machine by a predetermined signal.
The power transmission line is
A sensor that detects the signal from the actuator and
While the signal is detected by the sensor, the control of transmitting the electric power from the internal conductor to the power transmission electrode is executed, and while the signal is not detected by the sensor, the internal conductor performs the control. A power transmission control unit that executes control that prohibits power transmission to the power transmission electrode,
Further prepare
The power supply system according to claim 1 or 2. The power transmission electrode
When the carrier is present on the power transmission electrode, it is a size that cannot be visually recognized from the outside.
The power transmission control unit further executes control for prohibiting power transmission from the inner conductor to the power transmission electrode when the carrier is not present on the power transmission electrode.
The power supply system according to any one of claims 3. The power transmission line is
A detection unit that detects a state in which the power transmission electrode is short-circuited with the surrounding external conductor as a short circuit.
When the short circuit is detected by the detection unit, a notification unit that notifies the outside to that effect,
With more
The power transmission control unit
When the short circuit is detected by the detection unit, a control for prohibiting power transmission from the internal conductor to the power transmission electrode is executed.
The power supply system according to claim 3 or 4. In addition, the carrier is
A skirt and a brush capable of discharging foreign matter existing on the surface of the power transmission line in the traveling direction to the outside of the power transmission line are further provided.
The power supply system according to any one of claims 1 to 5.

Images