JP2006211804A - Noncontact power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noncontact power supply system in which the number of times when the gap between the air core coils of a noncontact power receiving unit comes to a core wound with a coil at a noncontact power supply section is small and lowering in power receiving capacity of the noncontact power receiving unit is insignificant. <P>SOLUTION: The noncontact power supply system comprises a noncontact power supply section 2 having a core 22 wound with a coil 21 being supplied with an AC current, and a noncontact power receiving unit 1 having a plurality of air core coils 11 being carried along a carrying path (not shown) and coupled with the coil 21 inductively and receiving power from the noncontact power supply section 2. A power supply section S where the core 22 is stalled and a magnetic flux generated around the coil 21 interlinks the air core coil 11 of the noncontact power receiving unit 1, and a non-power supply section where the core 22 is not installed are provided in the carrying path. Length of the core 22 in the length direction of the carrying path is not longer than the length of the air core coil 11 in the length direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-contact power feeding system in which a non-contact power receiving device that receives power in a non-contact manner from a non-contact power feeding unit is transported along a transport path.

  The non-contact power feeding system includes a non-contact power feeding unit and a non-contact power receiving device, and the non-contact power receiving device is installed on a transport body that is transported along a predetermined transport path, for example. The non-contact power receiving device receives power in a non-contact manner from a non-contact power feeding unit provided in the transport path, and feeds power to a load such as a lifting device or a lighting device installed on the transport body. The transport body is transported, for example, by being pulled by a chain by the transport device, and a device for supplying power to the transport device is provided separately from the non-contact power receiving device.

  Conventionally, as the non-contact power supply unit, a power supply line laid over substantially the entire path of the conveyance path is used, and the non-contact power receiving apparatus includes a coil that is inductively coupled to a power supply line through which an alternating current flows. Since this coil is wound around the core made of a magnetic material, the power receiving efficiency from the feeder line is improved. Such a conventional non-contact power feeding system is suitable when it is necessary to continuously feed power to a load transported along the transport path, or when power is supplied to an arbitrary position of the transport path with respect to the load. (See Patent Document 1).

However, in the case of performing section feeding that feeds power to a specific section of the transport path with respect to the load, in the conventional non-contact power feeding system in which the feed line is laid over substantially the entire path of the transport path, There was a problem that the laying process was wasted.
In order to solve this problem, a non-contact power supply system in which a power supply line is laid only in a predetermined section of a conveyance path is considered. However, since the non-contact power receiving apparatus includes one or more cores around which coils are wound, there is a problem that the weight increases.
Further, even when power is supplied continuously to a load conveyed along the conveyance path, or even when power is supplied to an arbitrary position of the conveyance path with respect to the load, the non-contact power receiving device is wound with a coil. Since one or more cores are provided, there is a problem that the weight increases.

Therefore, in order to solve such a problem, the present applicant provides a feeding path in which the coil and core of the non-contact power feeding unit are installed and a non-feeding section in which the coil and core are not installed in the conveyance path, thereby In Japanese Patent Application No. 2004-103227, a non-contact power feeding system that can reduce the weight of a non-contact power receiving device without having to lay a power feeding line over substantially the entire path of the conveyance path by providing the device with an air-core coil. is suggesting.
Japanese Patent No. 2822780 JP 2001-44054 A

In this non-contact power supply system, as shown in the explanatory diagram of FIG. 14A, the length of the core 221 around which the coil 212 of the non-contact power supply unit is wound is the non-contact power reception. When the length of the air core coil 11 of the apparatus is larger than the length in the conveyance direction, there are cases where two gaps between the air core coils 11 are applied to the core 221 as shown in the explanatory diagram of FIG.
The gap between the air-core coils 11 is a portion that does not contribute to power reception from the core 221, and when the gap between the air-core coils 11 is not applied to the core 221 as shown in the power-voltage characteristic diagram of FIG. 15 ( Compared to A), when the gap is applied to the core 221 at one place (B) and when the gap is applied to the core 221 at two places (C), the power receiving capability of the non-contact power receiving device is decreased and fluctuates and is not stable. There is a problem.

The present invention has been made in view of the above-described problems, and there are few places where a gap between air-core coils of a non-contact power receiving device is applied to a core around which a coil of a non-contact power feeding unit is wound, It is an object of the present invention to provide a non-contact power feeding system in which a decrease in power receiving capability of a non-contact power receiving apparatus is small.
Further, the present invention does not change the sum of the lengths of the portions where the gaps between the air-core coils of the non-contact power receiving device are applied to the core on which the coil of the non-contact power feeding unit is wound. An object of the present invention is to provide a non-contact power feeding system with stable power receiving capability.

  A contactless power supply system according to a first aspect of the present invention includes a contactless power supply unit having a core around which a coil to which an alternating current is supplied is wound, and a plurality of air cores that are transported along a transport path and inductively coupled to the coil A non-contact power receiving device that has a coil and receives power from the non-contact power feeding unit, wherein the core is installed, and a magnetic flux generated around the coil is conveyed to the air core of the non-contact power receiving device A non-contact power feeding system in which a power feeding section interlinking with a coil and a non-power feeding section in which the core is not installed are provided in the transport path, and the length of the core in the length direction of the transport path is The length of the air-core coil is equal to or less than the length in the length direction.

  In this non-contact power supply system, the non-contact power supply unit has a core around which a coil to which an alternating current is supplied is wound, and the non-contact power receiving device is transported along the transport path and is inductively coupled to the coil. It has a plurality of air-core coils and receives power from the non-contact power feeding unit. In the conveyance path, the core is installed, and the magnetic flux generated around the coil is linked to the air-core coil of the non-contact power receiving apparatus that has been conveyed, and the core is not installed. A feeding section is provided. The length of the core in the length direction of the conveyance path is equal to or less than the length of the air core coil in the length direction.

  A non-contact power feeding system according to a second aspect of the present invention is a non-contact power feeding unit having a plurality of cores around which a coil to which an alternating current is supplied is wound, and an equal interval that is transported along a transport path and inductively coupled to the coil. A non-contact power receiving device that receives power from the non-contact power supply unit, the core is installed, and magnetic flux generated around the coil has been conveyed A non-contact power feeding system in which a power feeding section interlinking with an air-core coil of the non-contact power receiving device and a non-power feeding section in which the core is not installed are provided in the transport path, and the length of the transport path The sum of the lengths of the plurality of cores in the direction is equal to or less than the length in the length direction of the air-core coil, and the plurality of cores includes a portion of the core and a portion of the air-core coil. Installed so that the relative positional relationship does not overlap And wherein the door.

  In this non-contact power supply system, the non-contact power supply unit has a plurality of cores around which a coil to which an alternating current is supplied is wound, and the non-contact power receiving device is transported along a transport path and guided to the coil It has a plurality of air-core coils that are connected at equal intervals and receives power from the non-contact power feeding unit. In the conveyance path, the core is installed, and the magnetic flux generated around the coil is linked to the air-core coil of the non-contact power receiving apparatus that has been conveyed, and the core is not installed. A feeding section is provided. The sum of the lengths of the plurality of cores in the length direction of the conveyance path is equal to or less than the length in the length direction of the air-core coil, and the plurality of cores includes each part of the core and each part of the air-core coil. It is installed so that the relative positional relationship of

  A non-contact power supply system according to a third aspect of the present invention is provided with a non-contact power supply unit having a core around which a coil to which an alternating current is supplied is wound, and at equal intervals that are transported along a transport path and inductively coupled to the coil. A non-contact power receiving device that receives power from the non-contact power supply unit, the core is installed, and the magnetic flux generated around the coil has been conveyed. A non-contact power feeding system in which a power feeding section interlinking with an air-core coil of a contact power receiving device and a non-power feeding section in which the core is not installed are provided in the transport path, in the length direction of the transport path The length of the core is equal to the sum of the length in the length direction of the air-core coil and the distance between the air-core coils.

  In this non-contact power supply system, the non-contact power supply unit has a core around which a coil to which an alternating current is supplied is wound, and the non-contact power receiving device is transported along the transport path and is inductively coupled to the coil. It has a plurality of air-core coils provided at equal intervals and receives power from the non-contact power feeding unit. In the conveyance path, the core is installed, and the magnetic flux generated around the coil is linked to the air-core coil of the non-contact power receiving apparatus that has been conveyed, and the core is not installed. A feeding section is provided. The length of the core in the length direction of the transport path is equal to the sum of the length in the length direction of the air core coil and the distance between the air core coils.

  A non-contact power feeding system according to a fourth aspect of the present invention is a non-contact power feeding unit having a plurality of cores around which a coil to which an alternating current is supplied is wound, and an equal interval that is transported along a transport path and inductively coupled to the coil. A non-contact power receiving device that receives power from the non-contact power supply unit, the core is installed, and magnetic flux generated around the coil has been conveyed A non-contact power feeding system in which a power feeding section interlinking with an air-core coil of the non-contact power receiving device and a non-power feeding section in which the core is not installed are provided in the transport path, and the length of the transport path The total length of the plurality of cores in the direction is equal to the sum of the length in the length direction of the air-core coil and the distance between the air-core coils, and the plurality of cores are each part of the core. And the relative positional relationship between each part of the air-core coil Characterized in that it is installed so as not to.

  In this non-contact power supply system, the non-contact power supply unit has a plurality of cores around which a coil to which an alternating current is supplied is wound, and the non-contact power receiving device is transported along a transport path and guided to the coil It has a plurality of air-core coils that are connected at equal intervals and receives power from the non-contact power feeding unit. In the conveyance path, the core is installed, and the magnetic flux generated around the coil is linked to the air-core coil of the non-contact power receiving apparatus that has been conveyed, and the core is not installed. A feeding section is provided. The total length of the plurality of cores in the length direction of the conveyance path is equal to the sum of the length in the length direction of the air-core coil and the distance between the air-core coils. It is installed so that the relative positional relationship between each part and each part of the air-core coil does not overlap.

  According to the non-contact power feeding system of the first invention, the core where the coil of the non-contact power feeding unit is wound has a maximum of one portion where the gap between the air-core coils of the non-contact power receiving device is applied, and the non-contact power feeding system. A contactless power feeding system in which a decrease in power receiving capability of the power receiving device is small can be realized.

  According to the non-contact power feeding system of the second invention, the core where the coil of the non-contact power feeding portion is wound has a maximum of one place where the gap between the air-core coils of the non-contact power receiving device is applied, and the non-contact power feeding system. It is possible to realize a non-contact power feeding system in which a decrease in power receiving capability of the power receiving device is small and the degree of freedom of arrangement of the core of the non-contact power feeding unit is increased.

  According to the non-contact power feeding system of the third invention, the sum of the lengths of the portions where the gaps between the air-core coils of the non-contact power receiving device are applied to the core around which the coil of the non-contact power feeding portion is wound does not vary. A non-contact power feeding system in which the power receiving capability of the non-contact power receiving apparatus is stable can be realized.

  According to the non-contact power feeding system of the third and fourth inventions, the sum of the lengths of the portions where the gap between the air-core coils of the non-contact power receiving device is applied to the core around which the coil of the non-contact power feeding unit is wound varies. Therefore, it is possible to realize a non-contact power feeding system in which the power receiving capability of the non-contact power receiving apparatus is stabilized and the degree of freedom of arrangement of the core of the non-contact power feeding unit is increased.

Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is an explanatory view showing an example of a transport system using the first embodiment of the non-contact power feeding system according to the present invention, and FIGS. 2 and 3 are configuration examples of the transport body of the transport system shown in FIG. It is the front view and side view which show. A conveyance system 6 shown in FIG. 1 is an example of an automobile manufacturing system, which is a production line that manufactures a plurality of automobiles in a flow-oriented manner, and conveys a plurality of vehicle bodies (hereinafter referred to as workpieces) in one direction while moving parts. Installation and inspection work is performed.

The transport system 6 includes a plurality of (for example, 15) transport bodies 3, 3,..., Non-contact power receiving devices 1, 1,... (FIGS. 2, 3), and lift devices 5, 5,. A transport device 4 for transporting each transport body 3 along a predetermined transport path is provided.
The non-contact power feeding system 7 (FIG. 2) includes power feeding sections S, S,... In a part of the conveyance path, and non-power feeding sections N, N,. The same number of non-contact power feeding units 2, 2,... (FIG. 2) are provided.
The non-contact power receiving device 1 (FIGS. 2 and 3) includes air-core coils 11, 11,... And resonant capacitors 121, 121,. Are provided with cores 22, 21,. Below, the conveyance direction of the conveyance body 3 is called the front-back direction (length direction), and the horizontal direction substantially orthogonal to a conveyance direction is described as the left-right direction (width direction).

  The conveyance body 3 includes a carriage 31 having a total length of about 6 m having four wheels 32, 32,... (FIGS. 2 and 3) on the front, rear, left, and right, and a carriage 35 on which the workpiece is placed. In addition, a lifting device 5 that lifts and lowers the lifting platform 35 is installed on the carrier 3, and a non-contact power receiving device 1 that supplies power to the lifting device 5 is also installed. That is, the non-contact power receiving device 1 is transported along the transport path by transporting the transport body 3 along the transport path.

The conveying device 4 includes rails 41 and 46, and the rail 41 includes a bottom 41b and protruding ridges 41a and 41a juxtaposed on both left and right ends of the bottom 41b, and each conveying to the protruding ridges 41a and 41a. The wheels 32 on the left and right of the body 3 are in rolling contact. The rail 46 has substantially the same configuration as the rail 41. The rails 41 and 46 are transport paths for the transport body 3 and each have a total length of about 130 m.
A workpiece (not shown) is placed on the lifting platform 35 of the transport body 3 transported on the rail 41, and no work is placed on the transport body 3 transported on the rail 46. That is, the rail 41 is the forward path (working transport path) of each transport body 3, and the rail 46 is the return path (returning transport path). The rail 46 is laid on the floor surface, for example, and the rail 41 is spaced apart from the upper side of the rail 46.

Further, the transport device 4 includes a driving roller 42, a driven roller 43, a motor 44 and a chain 45. The driving roller 42 and the driven roller 43 are arranged at both ends in the front-rear direction of the rail 41 so that the axial directions of the rollers 42 and 43 are substantially aligned with the left-right direction. The chain 45 is provided in an endless manner, and is suspended from rollers 42 and 43 through the upper and lower sides of the rail 41. The motor 44 rotates the driving roller 42 at a substantially constant predetermined speed.
Such a transport device 4 obtains electric power for driving the motor 44 from a commercial power source via an electric wire, for example. The transport bodies 3, 3,... Are detachably hooked on the chain 45 on the upper side of the rail 41 with an appropriate distance from each other.

  When the driving roller 42 is rotated by the motor 44, the driven roller 43 is also rotated through the chain 45, and the chain 45 is rotated at a substantially constant speed in the direction of the white arrow. The wheels 3, 32,... (FIGS. 2, 3) roll by the rotation of the chain 45, and the transport bodies 3, 3,... Are substantially constant in the direction of the white arrow from one end side to the other end side of the rail 41. It is conveyed on the rail 41 at a speed (for example, 4 km / h). That is, the transport bodies 3, 3,... Do not self-propelled and move while being pulled by the chain 45 in a state where they are connected to each other in a bead shape. Similarly to the configuration related to the rail 41, the transport device 4 includes a driving roller, a driven roller, a motor, and a chain (not shown) for transporting the transport body 3 along the rail 46 in the arrow direction.

  In the transport path in the first embodiment, a plurality of power feeding sections S for feeding power to the lifting device 5 are provided in a discrete manner (for example, six locations). 5 is a non-power feeding section N in which power is not supplied to the power source 5. When the transporter 3 is hung on any of the power feeding sections S, S,..., That is, while the transporting body 3 passes through the power feeding section S, To perform the prescribed work. At this time, the worker raises and lowers the lifting platform 35 using the lifting device 5 and adjusts the vertical position of the workpiece in accordance with the work content and the convenience of the work. Here, the worker may get on the transport body 3 and work on a work table (not shown) provided on the left and right outer sides of the rail 41.

  After the transport body 3 passes through the power feeding section S, the work using the lifting device 5 is not performed on the workpiece until the next power feeding section S is reached. That is, it is only necessary to supply power to each lifting device 5 in the first embodiment while the carrier 3 is in the power supply section S, and otherwise there is no need to supply power. In addition, when the conveyance body 3 is not over the power feeding section S, an operation without using the lifting / lowering device 5 can be performed on the workpiece.

  As described above, the power feeding sections S, S,... Are also work sections in which the operator should perform a predetermined work on the work placed on the lifting platform 35. The power feeding sections S, S,. Is provided for the rail 41, and is not provided for the rail 46 which is the return path. For this reason, it is desirable that the transport speed of each transport body 3 on the rail 46 is higher than the transport speed on the rail 41. Further, the transport body 3 does not stop in the power feeding section S. For this reason, work on each workpiece is efficiently performed.

  Each carrier 3 has a work placed on the lifting platform 35 at one end of the rail 41, and each carrier 3 itself is attached to a chain 45. Thereafter, each transport body 3 is transported on the rail 41 and passes through the power feeding sections S, S,. When arriving at the other end side of the rail 41, each carrier 3 has its workpiece removed from the lifting platform 35 and each carrier 3 itself removed from the chain 45, and is moved to the lower rail 46 by a lifting device (not shown). Be transported. Each transport body 3 on which no workpiece is placed is transported on the rail 46 from one end side of the rail 46 to the other end side, and is transferred to one end side of the upper rail 41 when it reaches the other end side. . Each transport body 3 transferred to the rail 41 is loaded with a new work on the lifting platform 35, attached to the chain 45, and transported on the rail 41 again.

  Each non-contact power receiving device 1 includes a plurality (for example, 10) of air-core coils 11 formed in a square shape using a conductive wire or a conductor pipe. An I-shaped coil mounting portion 33 protruding from the bottom surface of the carriage 31 toward the bottom 41b side of the rail 41 is provided on the bottom surface of the carriage 31 of the transport body 3 from the foremost part to the rearmost part. Is fixed to the coil mounting portion 33 by a coil fixture 34, and is suspended from the bottom surface of the carriage 31 so as to face the bottom portion 41 b of the rail 41. In addition, the structure which winds around the coil attachment part made from a nonmagnetic body may be sufficient instead of the structure which fixes each air-core coil 11 to the coil attachment part 33. FIG.

  The air core coils 11, 11,... Are oriented in the front-rear direction so that the shape of each air core coil 11 (hereinafter referred to as a side view shape) viewed from the side surface side of the carrier 3 is a square shape. They are spaced apart from each other by an appropriate length and are juxtaposed in a substantially straight line. That is, the air core coils 11 are arranged so as to have an I-shape when viewed from the front / back side of the carrier 3 (hereinafter referred to as a front view shape). Are adjacently connected in series, and are inductively coupled to the coils 21, 21,... Of the non-contact power feeding section 2 (FIG. 2).

  The coil mounting portion 33 is made of aluminum, and is interposed between the carriage 31 and the air core coils 11, 11,... To shield the leakage magnetic flux related to the air core coils 11, 11. It also functions as a magnetic field shielding unit that reduces adverse effects on the outside (for example, electrical equipment mounted on the carrier 3). In addition, it is not the structure which shields a magnetic field with the coil attachment part 33, for example, the magnetic field which is interposed between the trolley | bogie 31 and the air-core coils 11, 11, ... is a nonmagnetic material and uses electroconductive nonferrous metal. The structure which provides the shielding board may be sufficient.

  In each power feeding section S, a core 22 provided in the non-contact power feeding section 2 and a coil 21 wound around the core 22 are installed. In each non-power feeding section N, both the core 22 and the coil 21 are installed. It has not been. As shown in FIG. 5A, the core 22 is made of ferrite having a U-shape when viewed from the front, and has a base portion 22a and two leg portions 22b and 22b, and the coil 21 includes leg portions 22b, It is wound around 22b. As shown in FIG. 5B, a coil 211 may be wound around the base portion 22 a of the core 22 instead of the leg portions 22 b and 22 b of the core 22.

FIG. 4 is a perspective view illustrating a configuration example of the contactless power feeding unit 2 and the contactless power receiving device 1 included in the first embodiment of the contactless power feeding system 7 according to the present invention. 4, in order to clarify the positional relationship between the air-core coils 11, 11,...
On the upper surface of the bottom 41b of the rail 41 in the power feeding section S, an elongated rectangular core mounting plate 40 is laid so that the length direction of the core mounting plate 40 substantially coincides with the front-rear direction. The core 22 is installed so that the base 22a is fixed to the core mounting plate 40 and the legs 22b and 22b are facing upward so that the shape in front view is U-shaped.

The air core coils 11, 11,... Move between the leg portions 22b, 22b of the core 22 in the transport direction (FIG. 4, white arrow direction) when the transport body 3 is transported. The air-core coil 11, the coil 21 and the core 22 are separated by an appropriate length and do not contact each other. The air-core coils 11, 11,... Are resin-molded, or a cover made of synthetic resin is provided on the air-core coils 11, 11,. The structure which prevents the direct contact | abutting with the air-core coil 11, the coil 21, the core 22, etc. may be sufficient.
The length of the core 22, the number of turns of the coil 21 with respect to the core 22, the number of turns of each air-core coil 11, the length, the number of air-core coils 11, the separation distance, etc. 1.5 kW to 2 kW), and is determined according to specifications such as the length of the carriage 31.

  FIG. 6 is an explanatory diagram illustrating a relationship in length in the transport direction between the air-core coil 11 of the contactless power receiving device 1 of the first embodiment and the core 22 of the contactless power feeding unit 2. Each air-core coil 11 having a length a in the transport direction is provided with a gap d therebetween, and the length b of the core 22 in the transport direction is set to be equal to or less than the length a of each air-core coil 11. ing. As a result, the gap between the air-core coils 11 that does not contribute to power reception from the core 22 is applied to the core 22 in one or less places, and a decrease in power reception capability of the non-contact power reception device 1 can be suppressed.

FIG. 7 is a block diagram illustrating a circuit configuration example of the contactless power feeding unit 2 and the contactless power receiving device 1. The non-contact power feeding unit 2 includes a compensation capacitor 23 and a high frequency power supply device 24 in addition to the coil 21. The coil 21 and the compensation capacitor 23 are connected in series to the high frequency power supply device 24.
The high frequency power supply device 24 is connected to a commercial power source, rectifies and smoothes a commercial power source of AC 200 V, 60 Hz, and converts it into a direct current, and then converts the converted direct current into a high frequency alternating current (for example, 20 kHz) by an inverter (DC-AC converter). The converted high-frequency alternating current is passed through the coil 21 as a high-frequency constant current by the immittance conversion circuit.

  When a high frequency current is passed through the coil 21 of the non-contact power feeding unit 2 by the high frequency power supply device 24, a magnetic flux that changes with time is formed around the coil 21. When the transport body 3 is transported, the air-core coils 11 are sequentially linked in the transport direction with respect to the magnetic flux generated around the coil 21. The non-contact power receiving device 1 receives the induced electromotive force generated in the air-core coils 11, 11,... When the magnetic flux generated around the coil 21 is linked to the air-core coils 11, 11,.

  The non-contact power receiving device 1 includes a power receiving unit 12 and an output terminal 10 in addition to the air-core coils 11, 11,..., And the lifting device 5 includes a motor driver 51 having an inverter function for converting direct current to alternating current. And a motor 52 which is an AC motor. A motor driver 51 is connected to the output terminal 10 of the non-contact power receiving apparatus 1 via a DC bus DB, and the motor driver 51 drives a motor 52 as a load to raise and lower the lifting platform 35.

  The power receiving unit 12 includes the same number of resonance capacitors 121, 121,... As the air core coils 11, 11,..., And the air core coils 11, 11,. Thus, the series resonance circuit 120 is configured. The power receiving unit 12 includes a rectifier circuit 122 that is connected to the output side of the series resonant circuit 120 and uses a diode bridge that performs full-wave rectification of alternating current, and a smoothing capacitor 123 that smoothes the output voltage of the rectifier circuit 122. Both terminals of the smoothing capacitor 123 are connected to the output terminals 10 and 10 of the non-contact power receiving device 1.

  The series resonance circuit 120 is configured to resonate with a high-frequency current flowing through the coil 21 so that the air-core coils 11, 11,. In this case, the series resonant circuit 120 receives power induced in the air-core coils 11, 11,... And functions as a high-frequency AC constant voltage source. It is not necessary for the series resonance circuit 120 to completely resonate with the high-frequency current flowing through the coil 21.

  The output (AC constant voltage) of the series resonant circuit 120 is full-wave rectified by the rectifier circuit 122, and the direct current output from the rectifier circuit 122 is smoothed by the smoothing capacitor 123. The non-contact power receiving apparatus 1 supplies the direct current smoothed by the smoothing capacitor 123 to the motor driver 51 through the output terminal 10 and the DC bus DB. The motor driver 51 converts the supplied direct current into alternating current and supplies it to the motor 52.

  By the way, when the non-contact electric power feeding part 2 is not provided with the compensation capacitor | condenser 23, since the coil 21 is wound around the core 22, the inductance of the coil 21 is based on the constant of the resonance circuit (immittance conversion circuit) in the high frequency power supply device 24. The resonance state cannot be maintained and the power receiving efficiency of the non-contact power receiving device 1 is reduced. That is, the compensation capacitor 23 is provided in order to prevent a decrease in power receiving efficiency of the non-contact power receiving device 1 by maintaining the inductance of the non-contact power feeding unit 2 below a predetermined value.

  In the non-contact power feeding system 7 as described above, when the carrier 3 is in the power feeding section S, the non-contact power receiving device 1 is fed (receives power) from the non-contact power feeding unit 2 and is lifted and lowered as a load. Power is supplied to the device 5. Moreover, it is not necessary to stop the conveyance body 3 at the time of electric power feeding to the raising / lowering apparatus 5, and electric power feeding is possible during movement. Thereby, the automobile manufacturing efficiency of the automobile manufacturing system is improved.

(Embodiment 2)
Fig.8 (a) is explanatory drawing which shows the relationship between the air-core coil of the non-contact power receiving apparatus of Embodiment 2 of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. In this non-contact power feeding system 7a, the non-contact power receiving apparatus 1 includes air core coils 11 each having a length a in the transport direction with a gap d therebetween. Two cores 22a and 22b having a length b are provided. The two cores 22a and 22b are wound with coils 21a and 21b, respectively, so that the total 2b of the length b is equal to or less than the length a of each air-core coil 11, as shown in FIG. Is set. The lengths of the two cores 22a and 22b may not be equal.

Further, the cores 22a and 22b are, for example, the core 22a is hung on the front half of the air-core coil 11 so that the relative positional relationship between each part of the cores 22a and 22b and each part of the air-core coil 11 does not overlap. The core 22b is arranged so as to be hung on the latter half of the other air-core coil 11.
As a result, the gap between the air core coils 11 that does not contribute to power reception from the two cores 22a and 22b is applied to the cores 22a and 22b in one or less places, that is, for example, the gap between the air core coils 11 is less than one. When it is applied to the core 22a, the gap between the other air-core coils 11 is not applied to the core 22b at the same time, and the decrease in the power receiving capability of the non-contact power receiving device 1 can be suppressed.

  In the non-contact power feeding unit 2 a of the non-contact power feeding system 7 a, a coil 21 a, a compensation capacitor, a coil 21 b, and a compensation capacitor are connected in series to the high frequency power supply device 24. Other configurations and operations of the non-contact power feeding system 7a are the same as the configurations (FIGS. 1 to 5 and 7) and operations of the first embodiment of the non-contact power feeding system according to the present invention described above, and thus description thereof is omitted. To do.

(Embodiment 3)
Fig.9 (a) is explanatory drawing which shows the relationship between the air-core coil of the non-contact power receiving apparatus of Embodiment 3 of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. In the non-contact power supply system 7b, the non-contact power receiving apparatus 1 includes air core coils 11 having a length a in the transport direction with a gap d therebetween, and the non-contact power supply unit 2b is connected in the transport direction. Three cores 22c, 22d and 22e having a length b are provided. The three cores 22c, 22d, and 22e are wound with coils 21c, 21d, and 21e, respectively. As shown in FIG. 9B, the total length 3b is equal to or less than the length a of each air-core coil 11. It is set to be. Note that the lengths of the three cores 22c, 22d, and 22e may not be equal.

The cores 22c, 22d, and 22e are arranged so that the relative positional relationship between each part of the cores 22c, 22d, and 22e and each part of each air-core coil 11 does not overlap. For example, when the core 22c is engaged with 1/3 of the first half of the air-core coil 11, the core 22d is engaged with 1/3 of the center of the other air-core coil 11, and the core 22e is further separated with another air-core coil 11. It arrange | positions so that it may apply to 1/3 of the second half of the core coil 11. FIG.
As a result, the gap between the air core coils 11 that does not contribute to power reception from the three cores 22c, 22d, and 22e is applied to the cores 22c, 22d, and 22e in one or less places, that is, for example, the air core coil 11 When the gap between them is applied to the core 22c, the gap between the other air-core coils 11 is not applied to the cores 22d and 22e at the same time, and the reduction in the power receiving capability of the non-contact power receiving apparatus 1 can be suppressed.

  In the non-contact power feeding unit 2b of the non-contact power feeding system 7b, a coil 21c, a compensation capacitor, a coil 21d, a compensation capacitor, a coil 21e, and a compensation capacitor are connected in series to the high frequency power supply device 24. Other configurations and operations of the non-contact power feeding system 7b are the same as the configurations (FIGS. 1 to 5 and 7) and operations of the first embodiment of the non-contact power feeding system according to the present invention described above, and thus description thereof is omitted. To do.

(Embodiment 4)
FIG. 10 is an explanatory diagram showing the relationship between the air-core coil of the contactless power receiving device of Embodiment 4 of the contactless power feeding system according to the present invention and the core of the contactless power feeding unit. In the non-contact power feeding system 7c, the non-contact power receiving apparatus 1 includes the air-core coils 11 having a length a in the transport direction with a gap d therebetween, and the non-contact power feeding unit 2c is connected in the transport direction. A core 22f having a length b is provided. A coil 21f is wound around the core 22f, and the length b of the core 22f is set to be equal to the sum of the length a of the air-core coil 11 and the gap d.

  As a result, the sum of the lengths of the portions where the gap between the air-core coils 11 does not contribute to power reception from the core 22f and is applied to the core 22f is always d, and the power reception capability of the non-contact power reception device 1 is stabilized. Other configurations and operations of the non-contact power feeding system 7c are the same as the configurations (FIGS. 1 to 5 and 7) and operations of the first embodiment of the non-contact power feeding system according to the present invention described above, and thus description thereof is omitted. To do.

(Embodiment 5)
Fig.11 (a) is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of Embodiment 5 of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. In the non-contact power feeding system 7d, the non-contact power receiving apparatus 1 includes the air-core coils 11 having a length a in the transport direction with a gap d therebetween, and the non-contact power feeding unit 2d Two cores 22g and 22h having a length b are provided. The two cores 22g and 22h are respectively wound with coils 21g and 21h. As shown in FIG. 11B, the total length 2b is the sum of the length a of the air-core coil 11 and the gap d. Is set to be equal to. Note that the lengths of the two cores 22g and 22h may not be equal.

Further, the cores 22g and 22h have, for example, the core 22g so that the relative positional relationship between each part of the cores 22g and 22h and each part of each air core coil 11 does not overlap, The core 22h is disposed so as to be hung on the rear half of another air-core coil 11 when it is hung in the gap between the adjacent air-core coils 11.
As a result, the sum of the lengths of the portions where the gaps between the air-core coils 11 do not contribute to power reception from the two cores 22g and 22h and the cores 22g and 22h are applied is always d, and the power reception capability of the non-contact power reception device 1 Is stable.

  In the non-contact power feeding unit 2d of the non-contact power feeding system 7d, a coil 21g, a compensation capacitor, a coil 21h, and a compensation capacitor are connected in series to the high frequency power supply device 24. Other configurations and operations of the contactless power supply system are the same as the configurations (FIGS. 1 to 5 and 7) and operation of the first embodiment of the contactless power supply system according to the present invention described above, and thus the description thereof is omitted. .

(Embodiment 6)
FIG. 12 (a) is an explanatory view showing the relationship between the air-core coil of the non-contact power receiving device of Embodiment 6 of the non-contact power feeding system according to the present invention and the core of the non-contact power feeding unit. In the non-contact power feeding system 7e, the non-contact power receiving device 1 includes the air-core coils 11 having a length a in the transport direction with a gap d therebetween, and the non-contact power feeding unit 2e Three cores 22i, 22j, 22k having a length b are provided. The three cores 22i, 22j, and 22k are wound with coils 21i, 21j, and 21k, respectively. As shown in FIG. 12 (b), the total 3b of the length b is equal to the length a of the air-core coil 11 and the gap. It is set to be equal to the sum of d. Note that the lengths of the three cores 22i, 22j, and 22k may not be equal.

The cores 22i, 22j, and 22k are arranged so that the relative positional relationship between each part of the cores 22i, 22j, and 22k and each part of each air-core coil 11 does not overlap. For example, when the core 22 i is in the first half of the air core coil 11 and in the gap between the adjacent air core coils 11, the core 22 j is 1/3 of the center of the other air core coils 11. The core 22k is arranged so as to be applied to the third half of the second half of the other air-core coil 11.
As a result, the sum of the lengths of the portions where the gaps between the air-core coils 11 do not contribute to the power reception from the three cores 22i, 22j, 22k and the cores 22i, 22j, 22k is always d, and the non-contact power reception device 1 power receiving ability is stable.

  In the non-contact power feeding unit 2e of the non-contact power feeding system 7e, a coil 21i, a compensation capacitor, a coil 21j, a compensation capacitor, a coil 21k, and a compensation capacitor are connected in series to the high frequency power supply device 24. Other configurations and operations of the non-contact power feeding system 7e are the same as the configurations (FIGS. 1 to 5 and 7) and operations of the first embodiment of the non-contact power feeding system according to the present invention described above, and thus description thereof is omitted. To do.

(Embodiment 7)
FIG. 13 is an explanatory diagram showing the relationship between the air-core coil of the contactless power receiving device of Embodiment 7 of the contactless power feeding system according to the present invention and the core of the contactless power feeding unit. In the non-contact power receiving device 1, for example, 40 air-core coils 11 are divided into a plurality of sets (for example, 4 sets) approximately equally. In each divided group, two resonance capacitors are connected in series for each of the five air-core coils 11 to form a series resonance circuit. A rectifier circuit 122 a using a diode bridge is connected to the output side of each set of series resonant circuits, and the output side of each rectifier circuit 122 is connected in parallel to the resistor 126 and the smoothing capacitor 123. The electric power smoothed by the smoothing capacitor 123 is given to a load 125 such as a motor driver through a fuse 124.

In each power feeding section S (FIG. 4) of the non-contact power feeding system 7 (FIG. 2), for example, two sets of the core 22 and the coil 21 are installed and inductively coupled to the pair of adjacent air-core coils 11, respectively.
The coil 21 in each power feeding section S is connected in series to one compensation capacitor 23 and a high frequency power supply device 24.

In the non-contact power feeding system having such a configuration, the series circuit of the air-core coil 11 is divided to reduce the resistance in the current flowing section (when it is divided into four, it becomes 1/4). The influence of the resistance of the coil 11 is reduced.
Further, in the configuration shown in FIG. 13, two sets of the core 22 and the coil 21 for each power feeding section S are necessary. However, the cover that shields the leakage magnetic flux from the air core coil 11 is an air core coil applied to the power feeding section S. It is necessary only for 11 groups and may be provided on the power feeding section S side. Other configurations and operations of the contactless power supply system are the same as the configurations (FIGS. 1 to 5 and 7) and operation of the first embodiment of the contactless power supply system according to the present invention described above, and thus the description thereof is omitted. .

It is explanatory drawing which shows the example of the conveyance system using embodiment of the non-contact electric power feeding system which concerns on this invention. It is a front view which shows the structural example of the conveyance body of the conveyance system shown in FIG. It is a side view which shows the structural example of the conveyance body of the conveyance system shown in FIG. It is a perspective view which shows the structural example of the non-contact electric power feeding part with which the non-contact electric power feeding system which concerns on this invention is provided, and a non-contact power receiving apparatus. It is explanatory drawing which shows the relationship between the air core coil of the non-contact power receiving apparatus shown in FIG. 4, the core which a non-contact electric power feeding part has, and the coil wound around the core. It is explanatory drawing which shows the relationship of the length of the conveyance direction of the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is a block diagram which shows the circuit structural example of a non-contact electric power feeding part and a non-contact power receiving apparatus. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the relationship between the air-core coil of the non-contact electric power receiving apparatus of the non-contact electric power feeding system which concerns on this invention, and the core of a non-contact electric power feeding part. It is explanatory drawing which shows the example of operation | movement of the conventional non-contact electric power feeding system. It is a characteristic view which shows the output characteristic of the electric power-voltage of a non-contact power receiving apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-contact power receiving apparatus 2,2a-2e Non-contact electric power feeding part 6 Conveyance system 7,7a-7e Non-contact electric power feeding system 11 Air core coil 21,21a-21k Coil 22,22a-22k Core 23 Compensation capacitor 24 High frequency power supply 41 Rail (conveyance path)
120 Series Resonant Circuit 121 Resonant Capacitor 122, 122a Rectifier Circuit S Power Supply Section N Non-Power Supply Section

Claims (4)

A non-contact power feeding unit having a core around which a coil to which an alternating current is supplied is wound, and a plurality of air-core coils that are transported along the transport path and inductively coupled to the coil, from the non-contact power feeding unit A non-contact power receiving device for receiving power, wherein the core is installed, and a magnetic flux generated around the coil interlinks with an air-core coil of the non-contact power receiving device, and the core Is a non-contact power feeding system provided in the conveyance path and a non-power feeding section in which is not installed,
The length of the said core of the length direction of the said conveyance path is below the length of the said length direction of the said air-core coil, The non-contact electric power feeding system characterized by the above-mentioned. A non-contact power feeding unit having a plurality of cores around which a coil to which an alternating current is supplied is wound, and a plurality of air-core coils which are transported along the transport path and are inductively coupled to the coil. And a non-contact power receiving device that receives power from the non-contact power feeding unit, wherein the core is installed, and magnetic flux generated around the coil is chained to the air-core coil of the non-contact power receiving device that has been conveyed. A non-contact power feeding system in which a feeding section intersecting and a non-feeding section where the core is not installed are provided in the conveyance path,
The total length of the plurality of cores in the length direction of the transport path is equal to or less than the length in the length direction of the air-core coil, and the plurality of cores includes each part of the core and the air core. A non-contact power feeding system which is installed so that the relative positional relationship with each part of the coil does not overlap. A non-contact power feeding unit having a core around which a coil to which an alternating current is supplied is wound, and a plurality of air-core coils that are transported along a transport path and are inductively coupled to the coil, A non-contact power receiving device that receives power from the non-contact power supply unit, the core is installed, and magnetic flux generated around the coil is linked to the air-core coil of the non-contact power receiving device that has been conveyed A non-contact power feeding system in which a power feeding section and a non-power feeding section where the core is not installed are provided in the conveyance path,
The length of the said core of the length direction of the said conveyance path is equal to the sum of the length of the said length direction of the said air-core coil, and the distance between these air-core coils, The non-contact electric power feeding system characterized by the above-mentioned. A non-contact power feeding unit having a plurality of cores around which a coil to which an alternating current is supplied is wound, and a plurality of air-core coils which are transported along the transport path and are inductively coupled to the coil. And a non-contact power receiving device that receives power from the non-contact power feeding unit, wherein the core is installed, and magnetic flux generated around the coil is chained to the air-core coil of the non-contact power receiving device that has been conveyed. A non-contact power feeding system in which a feeding section intersecting and a non-feeding section where the core is not installed are provided in the conveyance path,
The total length of the plurality of cores in the length direction of the transport path is equal to the sum of the length in the length direction of the air-core coil and the distance between the air-core coils. The non-contact power feeding system is installed so that the relative positional relationship between each part of the core and each part of the air-core coil does not overlap.

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