JP2005224045A - Non-contact power feeding device and wire-less system provided with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce weight, to downsize dimensions, and to improve power feeding efficiency, with regard to a non-contact power feeding device that feed electric power to a motor-driven moving body by a non-contact method and a wire-less system provided with the device. <P>SOLUTION: A power feeder is provided with a primary core 7 made up of a roughly annular core body 8 in a portion of which openings are formed, and movable cores 9a, 9b that open or connect the openings; primary coils 10a, 10b wound on the primary core 7; and a charging power source 5 that feeds high-frequency electric power to the primary coils 10a, 10b. A power receiving terminal is provided with a secondary coil 11 and an electricity storing device 13 connected to the secondary coil 11. When power is fed from the charging power source 5 to the electricity-storing device 13, the movable cores 9a, 9b enter the hollow portion of the secondary coil 11 to connect the openings of a core body 8 crossing the secondary coil 11. When power is not fed, the movable cores 9a, 9b leave the hollow portion of the secondary coil 11 to open the openings of the core body 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a non-contact power feeding device that feeds power to a motor-driven movable body in a non-contact manner and an overhead wire-less system including the non-contact power feeding device.

  2. Description of the Related Art Conventionally, various non-contact power feeding apparatuses that perform power feeding in a non-contact manner to an electric mobile body have been developed. For example, Patent Document 1 discloses a non-contact power feeding device as shown in FIG. In the technique of this Patent Document 1, two AC power supply lines 50a and 50b with insulating coatings as primary conductors are extended along the trajectory of a moving body (not shown), and the secondary conductors 51a, An iron core 52 having an annular shape 51b is fixed on the moving body side. The iron core 52 is formed of an upper ring portion 53a and a lower ring portion 53b that can be freely opened and closed. The upper ring portion 53a and the lower ring portion 53b share a common portion 54, and secondary conductors 51a and 51b. Is wound around each of the upper ring portion 53a and the lower ring portion 53b. Then, the iron core 52 is installed on the moving body so that the AC power supply lines 50a and 50b intersect the upper ring portion 53a and the lower ring portion 53b of the iron core 52, and the magnetic force generated in the AC power supply lines 50a and 50b By generating an induced electromotive force in the secondary conductors 51a and 51b, the power of the AC power supply lines 50a and 50b is supplied to the moving body in a non-contact manner.

  In general, in the type in which power is supplied from the AC power supply lines 50a and 50b to the moving body as described above, support members 55a and 55b for supporting the AC power supply lines 50a and 50b are installed at a plurality of locations in the track direction. However, in the technique disclosed in Patent Document 1, when the moving body passes through the support members 55a and 55b, the support members of the upper ring portion 53a and the lower ring portion 53b so that the iron core 52 does not interfere with the support members 55a and 55b. The portions corresponding to 55a and 55b are appropriately opened and closed.

  Specifically, the upper permanent magnet 56a spans the upper surface of the upper support member 55a in parallel with the AC power supply line 50a and both end portions are inclined downward, and the lower surface of the lower support member 55b is parallel to the AC power supply line 50b. The upper permanent magnet 56a is attached to a portion corresponding to the support member 55a in the upper ring portion 53a via a fixture 57a. A first permanent magnet 58a and a second permanent magnet 58b having the same polarity as the lower permanent magnet 56b and attached to a portion corresponding to the support member 55b in the lower ring portion 53b via a fixture 57b When the body is traveling on the track, the upper ring portion 53a and the lower ring portion 53b are opened as the upper support member 55a and the lower support member 55b are approached, and the movable body is the upper support portion. So that the closing upper ring portion 53a and a lower ring portion 53b moves away from 55a and the lower support member 55b.

Further, Non-Patent Document 1 discloses a non-contact power feeding device in which a secondary battery is mounted on the elevator car side and power is fed in a non-contact manner only when the elevator car arrives at a specific floor as a power feeding point. Specifically, as shown in FIG. 12, a primary transformer 61 in which a primary coil 61a is wound around an I-shaped core 60a and a charging power supply 63 that supplies power to the primary transformer 61 are specified for the building. Provided on the floor (not shown), a secondary transformer 62 in which secondary coils 62a and 62b are wound around a C-shaped core 60b, and a rectifier 64 that converts AC power from the secondary transformer 62 into DC power. And a power storage device 65 for storing DC power converted by the rectifier 64 is provided in an elevator car (not shown), and when the elevator car arrives at a specific floor, the charging power source 63 supplies power to the primary transformer 61. By generating magnetic flux with the primary coil 61a, induced electromotive force is generated in the secondary coils 62a and 62b of the secondary transformer 62, and this electromotive force is adjusted by the rectifier 64. It is power storage device 65 After. In FIG. 12, reference numeral M ₁₀ indicates a magnetic flux.

Since friction occurs in contact power supply, dust is generated or worn. However, in non-contact power supply disclosed in Patent Document 1 and Non-Patent Document 1 as described above, friction does not occur, so compared with contact power supply. Maintenance is easy.
JP 2001-111985 A Hideki Ayano and two others, “Examination of high-efficiency non-contact power feeder”, IEEE Trans. IA, Vol. 123, No3, 2003

  However, in the technique of Patent Document 1, it is necessary to extend the AC power supply lines 50a and 50b along the trajectory of the moving body, or to install support members 55a and 55b for supporting the AC power supply lines 50a and 50b. This increases the equipment cost. In addition, since the iron core 52 is provided on the moving body side, the weight of the moving body increases and the power required to move the moving body increases or the apparatus becomes large. Furthermore, although the moving body always receives power from the AC power supply lines 50a and 50b, an air gap is formed in the iron core 52 when passing through the support members 55a and 55b. ) Decreases. For this reason, it is necessary to design the apparatus in consideration of the power feeding efficiency and the magnetic flux generation efficiency when the air gap is formed (for example, designing the cross-sectional area of the iron core to be large). End up.

  On the other hand, in the technique of Non-Patent Document 1, there is no need to install AC power supply lines 50a and 50b and support members 55a and 55b as in Patent Document 1, so that the equipment cost can be reduced compared to the technique of Patent Document 1. Although it is considered possible, since the C-shaped core 60b is provided on the moving body side, the weight of the moving body increases as in the problem of Patent Document 1, and the power required to move the moving body increases, or the device Becomes larger. Even when a C-shaped core is used on the building side and an I-shaped core smaller than the C-shaped core is used on the moving body side, the above problem cannot be solved because the I-shaped core needs to be provided on the moving body side. In addition, it is necessary to form a gap between the primary transformer 61 and the secondary transformer 62 in order to prevent the primary transformer 61 and the secondary transformer 62 from interfering with each other during the movement of the moving body. However, since this gap becomes an air gap during power feeding, there is a limit to further improving power feeding efficiency and further improving magnetic flux generation efficiency and downsizing the apparatus.

  The present invention was devised in view of such a problem, and can be reduced in weight and size, and can improve power feeding efficiency, and can be improved in power feeding efficiency. The purpose is to provide.

  Therefore, the non-contact power feeding device according to the first aspect of the present invention is a non-contact power feeding device that feeds power in a non-contact manner from a power feeding unit provided on the power feeding side to a power receiving unit provided on the power receiving side. A power feeding unit is wound around the primary core, which is configured to include a substantially annular core body in which an open part is partially formed and a movable core that opens or connects the open part. A primary coil and a charging power source that supplies high-frequency power to the primary coil are provided, and the power receiving unit includes a secondary coil and a power storage device connected to the secondary coil. When the power is supplied to the power storage device, the movable core enters the hollow portion of the secondary coil and connects the open portion of the core body in a state of crossing the secondary coil. Remove from the hollow part of the next coil and It is characterized by being configured to open the opening portion of the main body.

According to a second aspect of the present invention, there is provided the non-contact power feeding device according to the first aspect, wherein the power receiving unit is provided on a moving body traveling on a predetermined track, and the power feeding unit is provided on the track. The moving body is configured to travel on the track by supplying power from the power storage device.
According to a third aspect of the present invention, there is provided the non-contact power feeding device according to the second aspect, wherein the moving body is a train, and the power feeding unit is provided at least at a station where the train stops. Yes.

The contactless power feeding device according to a fourth aspect of the present invention is the device according to any one of the first to third aspects, wherein the movable core is opened by the magnetic force generated by the primary coil. Is configured to open or connect.
A contactless power feeding device according to a fifth aspect of the present invention is the device according to any one of the first to third aspects, wherein the movable core is connected to a position where the open portion of the core body is opened. It is characterized by having a drive mechanism that moves between the two.

A contactless power feeding device according to a sixth aspect of the present invention is the device according to any one of the first to fifth aspects, wherein the surfaces of the primary core, the primary coil, and the secondary coil are insulators. It is characterized by being covered.
The contactless power feeding device according to a seventh aspect of the present invention is the device according to any one of the second to sixth aspects, wherein the driving device that moves the primary core and the primary coil along the track. It is characterized by being provided.

According to an eighth aspect of the present invention, there is provided a non-contact power feeding device according to the present invention, further comprising a power feeding side power storage device that accumulates high-frequency power from the charging power source, and the driving device from the power feeding side power storage device. And the primary core and the primary coil are moved along the track.
The contactless power feeding device according to a ninth aspect of the present invention is the device according to any one of the second to eighth aspects, wherein the orbit width direction cross section of the primary core is formed in a U shape, and The movable core is composed of two movable core members placed on the open portion of the core body, and the two movable core members are directed toward the center in the track width direction when feeding power from the charging power source to the power storage device. By approaching, the open part of the core main body is connected in a state of entering the hollow part of the secondary coil and intersecting the secondary coil, and the two movable core members are mutually centered in the orbit width direction when no power is supplied. By separating from the hollow portion of the secondary coil, the open portion of the core body is opened.

  An overhead line-less system comprising the non-contact power feeding device of the present invention according to claim 10 comprises a non-contact power feeding device that feeds power in a non-contact manner from a power feeding unit provided on a station building side to a power receiving unit provided on a moving body side. An overhead line-less system, wherein the station building includes a primary core having a substantially annular core body in which an open portion is formed in part and a movable core that opens or connects the open portion; A primary coil wound around the primary core and a charging power source for supplying power to the primary coil are provided, and the mobile body is connected to the secondary coil and the secondary coil. A power storage device, and when the power is supplied from the charging power source to the power storage device, the movable core enters the hollow portion of the secondary coil and connects the open portion of the core body in a state of crossing the secondary coil. To power the moving body Both during unpowered is characterized in that the movable core is configured to open the opening portion of the core body disengaged from the hollow portion of the secondary coil to allow travel of the moving objects.

  According to the contactless power supply device of the present invention, the movable core enters the hollow portion of the secondary coil and connects the open portion of the core body in a state of crossing the secondary coil at the time of power supply. Since the movable core is sometimes separated from the hollow portion of the secondary coil to open the open portion of the core body, it is always possible to improve the power supply efficiency by eliminating the air gap of the primary core during power supply. it can. Further, since it is not necessary to provide a core on the power receiving side, the power receiving side can be reduced in weight and size. Further, since the air gap of the primary core can always be eliminated during power feeding and the magnetic flux generation efficiency can be improved, the power feeding side can be reduced in weight and size.

According to the non-contact power feeding device of the present invention as set forth in claim 2, power can be fed with high efficiency to a moving body traveling on a predetermined track. Moreover, since it is not necessary to provide a core in a moving body, the moving body can be reduced in weight and size. Furthermore, the power feeding unit provided on the track can be reduced in weight and size.
According to the non-contact power feeding device of the present invention as set forth in claim 3, power can be fed to the train with high efficiency at the stop station. In addition, since it is not necessary to provide a core for the train, the train can be reduced in weight and size. Furthermore, the power feeding unit provided at the stop station can be reduced in weight and size.

According to the non-contact power supply device of the present invention as set forth in claim 4, the open portion of the core body can be opened or connected in accordance with the power supply state from the charging power source.
According to the non-contact power feeding device of the present invention described in claim 5, the open portion of the core body can be opened or connected by the drive mechanism.
According to the non-contact power feeding device of the present invention, it is possible to prevent an electric shock even if the primary core, the primary coil, and the secondary coil are touched.

According to the non-contact power feeding device of the present invention described in claim 7, power can be reliably fed even when the moving body stops at any position on the track.
According to the non-contact power feeding device of the present invention described in claim 8, power can be reliably fed even when the moving body stops at any position on the track.
According to the non-contact power feeding device of the present invention described in claim 9, it is possible to always improve the power feeding efficiency by eliminating the air gap of the primary core during power feeding. Further, since it is not necessary to provide a core on the power receiving side, the power receiving side can be reduced in weight and size. Further, since the air gap of the primary core can always be eliminated during power feeding and the magnetic flux generation efficiency can be improved, the power feeding side can be reduced in weight and size.

  According to the overhead wireless system having the non-contact power feeding device of the present invention as set forth in claim 10, the open portion of the core body is in a state where the movable core enters the hollow portion of the secondary coil and intersects the secondary coil during power feeding. Since the movable core is separated from the hollow part of the secondary coil to open the open part of the core body when no power is supplied, the air gap in the primary core is always removed during power supply. Efficiency can be improved. Further, since it is not necessary to provide a core on the power receiving side, the power receiving side can be reduced in weight and size. Further, since the air gap of the primary core can always be eliminated during power feeding and the magnetic flux generation efficiency can be improved, the power feeding side can be reduced in weight and size.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) 1st Embodiment FIGS. 1-5 is for demonstrating the non-contact electric power feeder as 1st Embodiment of this invention, and FIG. 1 is a top view which shows typically the overhead wireless system of a train 2 is a diagram for explaining the operation during power feeding, FIG. 3 is a diagram for explaining the operation before or after the end of power feeding, and FIG. 4 is a diagram for explaining the operation during power running of the train. FIG. 5 is a diagram for explaining the operation during regenerative running of the train.

  The non-contact power supply device according to the present embodiment supplies power to an electric mobile body in a non-contact manner. For example, a train as shown in FIG. 1 [AGT (Automated Guideline Transit) traveling on an elevated track, (Including a new traffic system such as LRT (Light Rail Transit)) traveling on the track of the above]. Below, the case where this non-contact electric power feeding apparatus is applied to the system without a train overhead wire as an example is demonstrated.

  As shown in FIG. 1, in the train overhead line system according to the present embodiment, the train 1 travels on a predetermined track 3, and a station building (platform) 4 is installed near the track 3. ing. The train 1 is equipped with a power storage device 2. Further, a charger 6 for supplying power to the power storage device 2 of the train 1 is installed at a position where the station building 4 is on the track 3, and high-frequency power is supplied to the charger 6 in the station building 4. A charging power source 5 is installed. Thus, when the train 1 is stopped at the station building 4, power is supplied from the charger 6 to the power storage device 2, and the train 1 travels using the power of the power storage device 2. The charging power source 5 may be installed at a position away from the station building 4.

  Next, the configuration and operation of the contactless power supply device will be described more specifically. As shown in FIG. 2, the track 3 has a recess 19 extending in the track direction (a direction perpendicular to the paper surface), and the charger 6 is installed in the recess 19. The charger 6 includes a primary core 7 having a circular cross section (including a rectangular shape shown in FIG. 2) in the orbit width direction, and primary coils 10 a and 10 b wound around the primary core 7. It is composed.

  In the present embodiment, the primary core 7 is fixed to the bottom of the recess 19 and has a substantially annular core body 8 partially formed with an opening (opening), and an opening of the core body 8. It is composed of two movable core members (hereinafter simply referred to as movable cores) 9a and 9b mounted side by side in the track width direction. In FIG. 2, the core body 8 has a U-shaped cross section in the track width direction and an open top surface, and the movable cores 9a and 9b have an I-shaped cross section in the track width direction. The core body 8 and the movable cores 9a and 9b are both made of a ferromagnetic material. Further, here, the core body 8 and the movable cores 9a and 9b are formed with a predetermined thickness in the track direction, and have a cylindrical shape when the core body 8 and the movable cores 9a and 9b are viewed as one body. The primary coil 10a is wound around the movable core 9a along the track direction of the movable core 9a, and the primary coil 10b is wound around the movable core 9b along the track direction of the movable core 9b.

  The movable core 9a is provided with a drive mechanism 20a that applies a force in a direction away from the movable core 9b (right direction in FIG. 2). The drive mechanism 20a includes a base member 21a fixed to the wall surface (the right wall surface in FIG. 2) where the wheel 18a of the recess 19 is provided, and a spring member 22a that connects the base member 21a and the movable core 9a. Has been. The spring member 22a shown in FIG. 2 shows an extended state, and the spring member 22a in a normal state has a contracted shape as shown in FIG. Furthermore, the movable core 9b is provided with a drive mechanism 20b that applies force in a direction away from the movable core 9a (leftward in FIG. 2). The drive mechanism 20b includes a base member 21b fixed to the wall surface (the left wall surface in FIG. 2) where the wheel 18b of the recess 19 is provided, and a spring member 22b that connects the base member 21b and the movable core 9b. Has been. The spring member 22b shown in FIG. 2 shows an extended state, and the spring member 22b in the normal state has a contracted shape as shown in FIG.

When high-frequency power is supplied from the charging power source 5 to the primary coils 10a and 10b during power feeding, the movable cores 9a and 9b move and come into contact with each other due to the magnetic force generated by the primary coils 10a and 10b. The open portion of the core body 8 is connected, and a high frequency magnetic flux M ₀ as shown in FIG. 2 is generated. It is preferable to control the high-frequency power from the charging power source 5 so that the current value gradually increases rather than suddenly supplying a large high-frequency power when supplying power. By supplying high-frequency power to the primary coils 10a and 10b while controlling the current value in this way, the impact when the movable cores 9a and 9b come into contact with the opposing surface can be reduced, and the movable cores 9a and 9b are damaged. Can be prevented. When the supply of the high frequency power from the charging power source 5 is cut off, the spring members 22a and 22b are contracted, and the movable cores 9a and 9b are moved away from each other, and the open part of the core body 8 is opened. Thus, by opening or connecting the open portion of the core body 8 by the magnetic force generated by the primary coils 10a and 10b, the air gap of the primary core 7 can be eliminated in conjunction with the start of power feeding.

On the other hand, the train 1 includes a secondary coil 11, a rectifier 12, a power storage device 13, an inverter / converter 14, an SIV (Static Inverter) 15, an auxiliary device 16, a motor 17, and wheels (here rubber tires) 18a and 18b. It has been. The secondary coil 11 is fixed so as to protrude from the lower part of the train 1 and to be positioned in a space between the primary coil 10a and the primary coil 10b. Moreover, the secondary coil 11 is formed so that it may be wound over the track | orbit direction of movable core 9a, 9b. That is, the secondary coil 11 has a shape in which a hole (hollow part) is formed in the track width direction, and the movable cores 9a and 9b enter the hollow part of the secondary coil 11 and feed the secondary coil 11 during power feeding. The open portion of the core main body 8 is connected in a state of crossing, and the movable cores 9a and 9b are detached from the hollow portion of the secondary coil 11 when the power is not supplied to open the open portion of the core main body 8. Thereby, AC power (inductive electromotive force) is generated in the secondary coil 11 by the high-frequency magnetic flux M ₀ generated in the primary core 7 during power feeding.

  The rectifier 12 converts AC power generated in the secondary coil 11 into DC power, and the DC power converted by the rectifier 12 is stored in the power storage device 13. As the power storage device 13, for example, a known secondary battery, an electric double layer capacitor, a flywheel, or the like can be used alone or in combination. Among these, the secondary battery is particularly preferable because it can store a large amount of energy. The inverter / converter 14 has both the function of an inverter that converts DC power into AC power and the function of a converter that converts AC power into DC power, and is appropriately selected and used. The motor 17 is an AC motor, and when the motor 17 is driven, the wheels 18a and 18b are rotated. The SIV 15 converts DC power into AC power, and the AC power converted by the SIV 15 is supplied to an auxiliary device 16 such as an interior lighting or an air conditioner.

  The surfaces of the primary core (that is, the core body 8 and the movable cores 9a and 9b) 7, the primary coils 10a and 10b, and the secondary coil 11 are covered with, for example, a resin-based insulator. Even if one of them is touched, an electric shock can be prevented. Note that the same insulation treatment may be applied to the surfaces of the drive mechanisms 20a and 20b.

Since the contactless power supply device as the first embodiment of the present invention is configured as described above, at the time of power supply, high-frequency power is supplied from the charging power source 5 to the primary coils 10a and 10b as shown in FIG. The magnetic forces generated by the primary coils 10a and 10b apply an attractive force to the movable cores 9a and 9b so that the movable cores 9a and 9b enter and contact each other into the hollow portion of the secondary coil 11 and contact the primary core 7. A high frequency magnetic flux M ₀ is generated, and AC power is generated in the secondary coil 11. The AC power generated in the secondary coil 11 is converted into DC power by the rectifier 12 and then stored in the power storage device 13. Since the train 1 is basically stopped during power feeding, the electric power stored in the power storage device 13 is not used for rotating the wheels 18a and 18b but is used for the auxiliary machine 16.

When the power supply is completed, as shown in FIG. 3, the supply of the high-frequency power from the charging power source 5 is cut off, and at the same time, the movable cores 9 a and 9 b are detached from the hollow portion of the secondary coil 11 to the power storage device 13. The power supply of is stopped.
Then, during power running of the train 1, as shown in FIG. 4, the DC power stored in the power storage device 13 is converted into AC power by the inverter 14 and then flows to the motor 17 to drive the wheels 18 a and 18 b to rotate.

Further, during regenerative travel (brake braking) of the train 1, as shown in FIG. 5, the motor 17 generates power by obtaining the rotational power of the wheels 18 a and 18 b, and the AC power obtained in this way is converted into DC by the converter 14. After being converted into electric power, it is stored in the power storage device 13.
The power supply from the power storage device 13 to the auxiliary machine 16 is performed as necessary.
As described above, since the movable cores 9a and 9b are always in contact with each other during power feeding and the primary core 7 is closed, the air gap, which is a substantial factor for increasing the leakage magnetic flux, is completely eliminated. Leakage magnetic flux can be reduced, the coupling ratio between the primary coils 10a and 10b and the secondary coil 11 can be improved, and power can be supplied with high efficiency. Moreover, since it is not necessary to provide a core in the train 1, the train 1 can be reduced in weight and size. Furthermore, as described above, the movable cores 9a and 9b are always in contact with each other during power feeding, and the primary core 7 is closed, so that the air gap, which is a substantial factor for reducing magnetic flux generation efficiency, is completely eliminated. Therefore, the magnetic flux generation efficiency is improved. When the magnetic flux generation efficiency is improved, the cross-sectional area of the primary core 7 and the current capacity of the primary coils 10a and 10b can be reduced, and the charger 6 and the charging power source 5 can be reduced in weight and size.

  In addition, instead of the drive mechanisms 20a and 20b including the base members 20a and 20b and the spring members 22a and 22b according to the present embodiment, the drive mechanisms 23a and 23b including the stepping motor as illustrated in FIG. 6 may be provided. Good. By using such drive mechanisms 23a and 23b, it is possible to position the movable cores 9a and 9b with high accuracy, and as in the present embodiment, while mitigating the impact caused by the contact between the movable cores 9a and 9b. The air gap of the primary core 7 can be eliminated.

(B) Second Embodiment FIG. 7 is a block diagram schematically showing a non-contact power feeding device as a second embodiment of the present invention. In FIG. 7, the same parts or members as those of the above-described contactless power supply device of the first embodiment are denoted by the same reference numerals, and the description overlapping with the first embodiment is omitted.
The charger 6 according to the present embodiment is provided with wheels 25a and 25b and a drive device 26 for rotationally driving the wheels 25a and 25b, and the charger 6 can move the recess 19 in the track direction. It is like that. Further, the charging power source 5, the primary coils 10 a, 10 b, and the driving device 26 are connected so that power can be supplied from the charging power source 5 to the primary coils 10 a, 10 b and the driving device 26 even when the charger 6 moves. An extension cable 24 to be connected is provided. The cable 24 is configured to be capable of automatic winding. The base members 21 a and 21 b of the drive mechanisms 20 a and 20 b are fixed to the charger 6.

  Since the non-contact power feeding device as the second embodiment of the present invention is configured as described above, power can be reliably fed even when the train 1 stops at any position on the track 3. For example, normally, a large amount of electric power is required when the train 1 starts to move (acceleration), but power is supplied while the charger 6 is moved together with the train 1 by the driving device 26 for a predetermined time after the train 1 starts moving. By continuing the operation, it is possible to suppress a significant power consumption of the power storage device 13 of the train 1 at the start of movement, and to perform more stable acceleration. The movable cores 9a and 9b are detached from the hollow portion of the secondary coil 11 by stopping the power supply from the charging power source 5 after a predetermined time has elapsed since the train 1 started to move. Then, the charger 6 is moved to the original location by the driving device 26. At this time, the cable 24 is automatically wound.

  Even when the stop position of the train 1 at the station building 4 is deviated or when the train 1 stops between the station buildings 4 and 4 due to insufficient power, the train 1 moves to the position where the train 1 is stopped and reliably supplies power. It is possible.

(C) Third Embodiment FIG. 8 is a configuration diagram schematically showing a non-contact power feeding device as a third embodiment of the present invention. In FIG. 8, the same parts or members as those of the above-described contactless power supply device of the first embodiment are denoted by the same reference numerals, and the description overlapping with the first embodiment is omitted.

  The charger 6 according to the present embodiment includes wheels 25 a and 25 b, a drive device 26 for rotating the wheels 25 a and 25 b, and a power storage device 27. It can move in the orbital direction. Further, the power storage device 27 of the charger 6 can store the high frequency power from the charging power source 5 by converting it into DC power, and once the power storage device 27 is charged by the charging power source 5, the charger 6 By disconnecting from the charging power source 5 and supplying the electric power stored in the power storage device 27 to the driving device 26, it can be self-propelled. In this case, power is supplied to the primary coils 10a and 10b by converting DC power stored in the power storage device 27 into high-frequency power. The base members 21 a and 21 b of the drive mechanisms 20 a and 20 b are fixed to the charger 6.

  Since the non-contact power feeding device as the third embodiment of the present invention is configured as described above, power can be reliably fed even when the train 1 stops at any position on the track 3. For example, when the train 1 supplies power at the station building 4, power is supplied from the charging power source 5 to the primary coils 10 a and 10 b as usual. At this time, power is also supplied to the power storage device 27 of the charger 6. . Thereby, for example, even if the train 1 is stopped between the station buildings 4 and 4 due to power shortage, the charger 6 uses the power of the power storage device 27 to move to the position where the train 1 is stopped. 1 is fed. When the necessary power supply to the train 1 (for example, the supply of power necessary to travel to the next station building 4) is completed, the charger 6 returns to the original location using the power of the power storage device 27. In the above description, when power is supplied to the train 1 at the station 4, power is supplied to the power storage device 27 of the charger 6 at the same time. For example, it may be after power supply from the charging power source 5 to the train 1 is completed in the station building 4. Further, when power is supplied to the train 1 stopped between the station buildings 4 and 4, the electric power necessary for the charger 6 to return to the original location is left in the power storage device 27.

  Further, even when the stop position of the train 1 at the station building 4 is shifted, it is possible to move to the position where the train 1 is stopped and to reliably supply power, and to connect the charger 6 as in the second embodiment described above. It is of course possible to supply power while moving with the train 1.

(D) 4th Embodiment FIG. 9: is a block diagram which shows typically the non-contact electric power feeder as 4th Embodiment of this invention. In FIG. 9, the same parts or members as those of the above-described contactless power supply device of the first embodiment are denoted by the same reference numerals, and the description overlapping with the first embodiment is omitted.

As shown in FIG. 9, in this embodiment, the way of contact of the movable cores 9a and 9b is different from that of the first embodiment. That is, in the present embodiment, the movable cores 9a and 9b are configured so that the lower surface of the movable core 9a and the upper surface of the movable core 9b are in contact with each other during power feeding.
As shown in FIG. 10 (a), for example in the first embodiment, the movable core 9a, 9b is the case where the movable core 9a upon contact facing surface, misalignment between 9b occurs, the magnetic flux M ₁ in the contact surface The cross-sectional area of the passage is reduced and the magnetic flux density is increased. If the magnetic flux density is increased in this way, the movable cores 9a and 9b may locally generate heat or may be locally magnetically saturated. Therefore, the cross-sectional area of the movable cores 9a and 9b is considered in consideration of the effect of displacement. May need to be set. In addition, it is necessary to control so that the impact caused by the contact between the movable cores 9a and 9b is not increased.

On the other hand, in this embodiment, as shown in FIG. 10 (b), the movable cores 9a and 9b are vertically wrapped so as to sufficiently cross each other, so that the contact cross-sectional area between the movable cores 9a and 9b is first. The contact cross-sectional area of one embodiment can be made sufficiently wide. As a result, the magnetic flux M ₂ generated in the movable cores 9a and 9b has a lower density on the contact surface than the density inside the movable cores 9a and 9b. Further, in the present embodiment, since the movable cores 9a and 9b intersect with each other in the vertical direction, the impact due to the contact with the opposing surface as in the first embodiment hardly occurs.

  Thus, according to the non-contact power feeding device of the present embodiment, the movable cores 9a and 9b can be prevented from generating heat and being magnetically saturated, and the impact when the movable cores 9a and 9b are in contact is suppressed. be able to.

(E) Others Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the non-contact power feeding apparatus is applied to a train overhead line-less system has been described. However, the non-contact power feeding apparatus is not limited to this, for example, an elevator, a carriage, The present invention can be widely applied to an apparatus that supplies power to an electric mobile body such as a crane without contact. Moreover, you may replace the movable cores 9a and 9b which concern on 1st-3rd embodiment with the movable cores 9a and 9b which concern on 4th Embodiment.

1 is a plan view schematically showing a train overhead line-less system according to a first embodiment of the present invention. It is a block diagram which shows typically the non-contact electric power supply as 1st Embodiment of this invention, Comprising: It is a figure for demonstrating the operation | movement during electric power feeding. It is a block diagram which shows typically the non-contact electric power supply as 1st Embodiment of this invention, Comprising: It is a figure for demonstrating the operation | movement before electric power supply start or after completion | finish of electric power supply. It is a block diagram which shows typically the non-contact electric power feeder as 1st Embodiment of this invention, Comprising: It is a figure for demonstrating the operation | movement at the time of power running of a train. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows typically the non-contact electric power feeder as 1st Embodiment of this invention, Comprising: It is a figure for demonstrating the operation | movement at the time of the regeneration driving | running | working of a train. It is a block diagram which shows typically the modification of 1st Embodiment of this invention. It is a block diagram which shows typically the non-contact electric power feeder as 2nd Embodiment of this invention. It is a block diagram which shows typically the non-contact electric power feeder as 3rd Embodiment of this invention. It is a block diagram which shows typically the non-contact electric power feeder as 4th Embodiment of this invention. (A) is a figure which shows magnetic flux distribution of the movable core which concerns on 1st Embodiment, (b) is a figure which shows magnetic flux distribution of the movable core which concerns on 4th Embodiment. It is a figure which shows the conventional non-contact electric power feeder typically. It is a figure which shows the conventional non-contact electric power feeder typically.

Explanation of symbols

1 Train (moving body)
2 Power storage device 3 Track 4 Station building 5 Charging power supply 6 Charger 7 Primary core 8 Core body 9a, 9b Movable core member (movable core)
10a, 10b Primary coil 11 Secondary coil 12 Rectifier 13 Power storage device 14 Inverter / converter 15 SIV
16 Auxiliary machine 17 Motor 18a, 18b Train wheel 19 Recess 20a, 20b Drive mechanism 21a, 21b Base member 22a, 22b Spring member 24 Cable 25a, 25b Charger wheel 26 Charger drive device 27 Charger storage device ( Power storage device)

Claims (10)

A non-contact power feeding device that feeds power in a non-contact manner from a power feeding unit provided on a power feeding side to a power receiving unit provided on a power receiving side,
The power feeding part is
A primary core comprising a substantially annular core body with an open portion formed in part and a movable core that opens or connects the open portion;
A primary coil wound around the primary core;
A charging power source for supplying high-frequency power to the primary coil is provided.
The power receiving unit
A secondary coil;
A power storage device connected to the secondary coil,
When the power is supplied from the charging power source to the power storage device, the movable core enters the hollow portion of the secondary coil and connects the open portion of the core body in a state of crossing the secondary coil. A contactless power feeding device, wherein the core is configured to be detached from the hollow portion of the secondary coil to open the open portion of the core body. The power receiving unit is provided on a moving body that travels on a predetermined track, the power feeding unit is provided on the track, and the mobile body is configured to travel on the track by supplying power from the power storage device. The contactless power feeding device according to claim 1, wherein The non-contact power feeding apparatus according to claim 2, wherein the moving body is a train, and the power feeding unit is provided at least at a station where the train stops. The said movable core is comprised so that the open part of the said core main body may be open | released or connected with the magnetic force which the said primary coil generate | occur | produces, The any one of Claims 1-3 characterized by the above-mentioned. Non-contact power feeding device. The drive mechanism which moves the said movable core between the position which opens the open part of the said core main body, and the position connected is provided, The any one of Claims 1-3 characterized by the above-mentioned. Non-contact power feeding device. The contactless power supply device according to any one of claims 1 to 5, wherein surfaces of the primary core, the primary coil, and the secondary coil are covered with an insulator. The contactless power supply device according to any one of claims 2 to 6, further comprising a drive device that moves the primary core and the primary coil along the track. A power supply side power storage device for storing power from the charging power source is provided,
8. The non-contact power feeding device according to claim 7, wherein the driving device obtains electric power from the power feeding side power storage device and moves the primary core and the primary coil along the track. The cross-section in the orbit width direction of the primary core is formed in a U shape,
The movable core is composed of two movable core members placed on the open part of the core body,
When the power supply from the charging power source to the power storage device, the two movable core members approach each other toward the center in the track width direction and enter the hollow portion of the secondary coil and intersect the secondary coil. To connect the open portion of the core body, and when the power is not supplied, the two movable core members are separated from the center of the orbital width direction so as to be separated from the hollow portion of the secondary coil, thereby opening the open portion of the core body. The contactless power supply device according to claim 2, wherein the contactless power supply device is opened. An overhead line-less system including a non-contact power feeding device that feeds power in a non-contact manner from a power feeding unit provided on a station building side to a power receiving unit provided on a moving body side,
The station building is wound around the primary core, which includes a substantially annular core body having an opening portion formed in part and a movable core that opens or connects the opening portion. And a charging power source for supplying power to the primary coil,
The mobile body includes a secondary coil and a power storage device connected to the secondary coil.
When power is supplied from the charging power source to the power storage device, the movable core enters the hollow portion of the secondary coil and crosses the secondary coil to connect the open portion of the core body to supply power to the moving body. In addition, the movable core is configured to be detached from the hollow portion of the secondary coil and open the open portion of the core body so that the moving body can run when no power is supplied. An overhead wireless system equipped with a non-contact power feeding device.

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