Note: Descriptions are shown in the official language in which they were submitted.
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DESCRIPTION
TRANSMISSION DEVICE
Technical Field
[0001] The present invention relates to a transmission device, and
more particularly, to a transmission device having a very small phase delay
and amplitude attenuation (voltage drop) at a time when power obtained
from a solar cell is transmitted.
Background Art
[0002] In general, when a signal and power are transmitted through a
transmission path, it is unavoidable that transmission characteristics are
deteriorated in that the voltages of a signal and power received on a signal
receiving side and on a power receiving side drop (amplitudes are
attenuated) with respect to a transmitted signal (input) or the phase of
them are delayed due to a resistance component and an inductance
component of a transmission path. It is an important matter to design a
structure of the transmission path so as to minimize the phase delay and
the voltage drop and to thereby optimize the transmission characteristics.
[0003] In particular, when a high-frequency signal is transmitted, the
signal is deteriorated remarkably by being greatly affected by a floating
capacitance and an inductance existing in the transmission path, a loss
due to a skin effect, a dielectric loss, frequency dispersion and the like,
and
accordingly, when a signal is transmitted in a long distance, it is necessary
to locate a relay for amplifying the signal on the way thereof.
[0004] To improve the problem due to the signal deterioration, by
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previously taking the deterioration of a waveform into consideration, an
arrangement for providing an equalizer has come into practical use for
arranging a signal waveform on a transfer side as a waveform in which a
deteriorated waveform is compensated for. However, such practical use
involves a problem in that provision of the equalizer increase a cost and
makes the arrangement complex.
[0005] Further, it is also proposed to cope with the above problem by
separating a high-frequency component whose signal is greatly deteriorated
from a low-frequency component whose signal is less deteriorated. For
example, a transmitted signal is separated to a low-frequency component
and a high-frequency component by a waveform deterioration
compensation unit having a plane pattern formed in a flat C-shape. More
specifically, a high-frequency transmission path, which makes use of an
inter-wiring capacitance, is formed making use of the fact that the
impedance of the high-frequency component is small with respect to a
capacitance, and the high-frequency component is separated by the high-
frequency transmission path.
On the other hand, the low-frequency component is separated using
a low-frequency transmission path which is composed of a C-shaped
conducting path, and the low-frequency component is caused to pass on
the low-frequency transmission path side longer than the high-frequency
transmission path by a predetermined amount.
According to such arrangement, a transmission time difference is set
between the low-frequency transmission path and the high-frequency
transmission path, and the high-frequency component is transmitted faster
than the low-frequency component to thereby compensate for waveform
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deterioration (a delay of the high-frequency component whose transmission
speed is slower than that of the low-frequency component is compensated
for by a difference of distance). By synthesizing this result, the signal
waveform deterioration compensated for. A waveform deterioration
compensation transmission path arranged as described above is disclosed
in Patent Document 1.
[0006] The signal deterioration also occurs in wirings of an integrated
circuit likewise. For example, an integrated circuit, which operates at a
clock frequency equal to or larger than gigahertz, is greatly affected by the
ground as a return current path in addition to an inductance component of
wirings. That is, since a floating capacitance and inductance, which are
not disadvantageous in a low-frequency region, causes a serious problem
in a high frequency region, a return current strongly depends on the
frequency characteristics of the wirings and does not necessarily pass
through the ground. As a result, when a high frequency signal is
transmitted through a transmission path, transmission characteristics are
deteriorated, and a voltage level drops and a phase delays further at an
output end.
[0007] As described above, the quality of a signal transmitted in a
signal transmission path is affected by a resistance component, a
capacitance component and an inductance component of the transmission
path itself. In particular, in a high-frequency transmission, since the
floating components of these components greatly affect the signal, a signal
amplitude is greatly attenuated (voltage is dropped) as well as a phase is
greatly delayed, and thus an eye pattern as a parameter for evaluating
transmission characteristics is greatly collapsed, providing the most
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significant problem in the signal transmission.
[0008] Further, in order to cope with amplitude deterioration (voltage
drop) caused mainly by the resistance component in the transmission path,
there is provided, for example, a method of amplifying the amplitude by an
amplifier accommodated in a relay on the way of transmission.
[0009] As, for example, a conventional power transfer system, there is
known a system of disposing a series compensation apparatus, which
generates a voltage having a phase offset by 90 in terms of an electric
angle, in an electric power cable, the system generating a voltage for
equivalently compensating a voltage drop due to reactance (refer to, for
example, Patent Document 2).
Patent Document 1: Japanese Unexamined Patent Application
Publication No. 2004-297538
Patent Document 2: Japanese Unexamined Patent Application
Publication No. 11-299104
[0010] Disclosure of the Invention
However, in the conventional power transmission system disclosed in
Patent Document 2, since it is necessary to provide the series
compensation apparatus for generating the voltage having the phase offset
by about 90 to a current flowing in an electric power cable, a cost is
increased and an external power is required, which is contrary to energy
saving.
[00111 Although there is conventionally known a power cable such as
a strand cable and a coaxial cable as a transmission medium for
transferring power obtained by a solar cell, the power cable has a problem
in that the conversion efficiency of the power of the solar cell is greatly
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reduced due to the structure of the solar cell, the internal resistance
thereof, the resistance component of the power cable itself, and the
inductance component thereof.
[0012] In particular, since diode oscillation is generated in the solar
cell by a diode as a semiconductor, the conventional power cable is
disadvantageous in that when power of a high-frequency component is
transmitted, a signal is remarkably deteriorated by an increase of influence
of a floating capacitance and inductance existing in an internal resistance
of the solar cell and in a transmission path, a loss due to a skin effect, a
dielectric loss, frequency dispersion and the like.
[0013] An object of the present invention, which was made in
consideration of the above circumstances, is to provide a transmission
device capable of effectively transmit power obtained from a solar cell and
the like to a load.
[0014] A transmission device of the present invention includes: a
magnetic body; and a transmission medium having first and second
conducting wires, which are separated from each other and disposed
approximately in parallel with each other, a third conducting wire, which is
alternately entangled with and wound around the first and second
conducting wires from one direction thereof so as to form a plurality of
entangling portions in a longitudinal direction of the first and second
conducting wires, respectively, and a fourth conducting wire, which is
alternately entangled with and wound around the first and second
conducting wires from one direction thereof so as to form a plurality of
entangling portions and a plurality of intersecting portions so as to
intersect with the third conducting wire inside the first and second
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conducting wires in the longitudinal direction of the first and second
conducting wires, respectively, the transmission medium being wound
around the magnetic body.
[0015] According to the transmission device of the present invention,
when a signal and power are transmitted, the phase delay and the
amplitude attenuation (voltage drop) of the signal and the power can be
significantly reduced.
[0016] In the present invention of the characters mentioned above, it
is preferable that the respective entangling portions of the third and fourth
conducting wires are alternately arranged in the longitudinal direction of
the first and second conducting wires, respectively, the third and fourth
conducting wires are entangled with one of the first and second conducting
wires in a same direction in the respective entangling portions, respectively,
the first and second conducting wires are entangled with each other at
entangling portions in opposing directions, and the third and fourth
conducting wires are overlapped with each other in directions opposite to
the directions of the first and second conducting wires in the longitudinal
direction thereof at the respective intersecting portions.
[0017] With this arrangement, even if an external force such as
tension and the like is applied to the transmission medium in a
longitudinal direction, since the overall shape thereof can be suppressed
from being changed, the phase delay and the reduction of the amplitude
attenuation can be suppressed.
[0018] In the present invention, it may be desired that the first to
fourth conducting wires are disposed within a range in which an
electromagnetic interaction is caused by a current flowing in the
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conducting wires.
[0019] In the present invention, the third and fourth conducting wires
may be formed in a sine wave shape or a chevron shape so as to be
entangled with the first and second conducting wires.
[0020] In the present invention, it is preferable that the first
conducting wire and the second conducting wire are commonly connected
to on input end sides and output end sides, respectively, such that the
common input end side is connected to one of a pair of electrodes of a solar
cell and the common output end side is connected to one end of a load,
and wherein the third and fourth conducting wires are commonly
connected to the input and output end sides, respectively, and the
common input end side is connected to another one of the pair of
electrodes of the solar cell, and the common output end side is connected
to another end of the load.
[0021] Furthermore, in the present invention, it is preferable that the
first conducting wire and the second conducting wire are commonly
connected to the input end sides and the output end sides, respectively,
the common input end side is connected to one of a pair of electrodes of a
solar cell, the common output end side is connected to one end of a load,
the third conducting wire and the fourth conducting wire are commonly
connected to the input end side and the output end side, respectively, the
common input end side is connected to another one of the pair of
electrodes of the solar cell, and the common output end side is connected
to another end of the load.
[0022] In the present invention, it is preferable that the transmission
device has a vessel having an electric insulation property, in which the
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transmission medium and the magnetic body are accommodated and that
an input terminal and an output terminal, which are electrically connected
to an input side and an output side of the transmission medium, are
disposed on an outer surface of the vessel.
[0023] Furthermore, in the present invention, it is preferable that a
plurality of the transmission mediums is electrically connected in parallel
with each other.
[0024] Still furthermore, in the present invention, it is preferable that
the solar cell is composed of either one of a crystal solar cell, a thin film
solar cell and a compound solar cell.
[0025] Still furthermore, in the present invention, it is also preferable
that the load is composed of an inverter for converting a direct current
from the solar cell to an alternating current. However, the load need not
be the inverter and may be an electric load including at least any one of L,
C and R.
[0026] Still furthermore, in the present invention, it is preferable that
the magnetic body and the transmission medium are arranged so as to be
resonated in series to an oscillating frequency of the solar cell.
Brief Description of the Drawings
[0027] [Fig. 1] Fig. 1 is a schematic view showing an example of
arrangement of a transmission device according to one embodiment of the
present invention and an example of a method of connecting the
transmission device to a solar cell.
[Fig. 2] Fig. 2(A) is a plan view of a portion of a transmission line
used for the transmission device, and Fig. 2(B) is a schematic view showing
a principle of the transmission line.
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[Fig. 3] Fig. 3 is a schematic plan view showing an example of a
connecting method on an input end side and an output end side of the
transmission line shown in the Fig. 2(A).
[Fig. 4] Fig. 4 is a schematic view showing a distribution of electric
field intensity at a time when power is supplied through the transmission
line as shown in Fig. 1 and Fig. 2(A) .
[Fig. 5] Fig. 5 is a schematic view showing moving directions when a
loop antenna is moved in three directions (X, Y, Z) of the transmission line
in an experiment for measuring the distribution of the electric field
intensity to collect the electric field intensity distribution data shown in
Fig.
4.
[Fig. 6] Fig. 6 is shows angles between the antenna surface of the
loop antenna and the transmission line in the experiment for measuring
the distribution of the electric field intensity shown in Fig. 4, and a right
column represents perspective views of the loop antenna at the respective
angles.
[Fig. 7] Fig. 7 is a graph showing a variation of transmitted power in a
day when the power generated by a 110 W spherical solar cell is
transmitted to a load through the transmission device shown in Fig. 1.
[Fig. 8] Fig. 8 is a graph showing a variation of transmitted power in a
day when the power generated by a 110 W single-crystal solar cell is
transmitted to a load through the transmission device shown in Fig. 1.
[Fig. 9] Fig. 9 is a plan view of a portion of another transmission line
used for the transmission device shown in Fig. 1.
Best Mode for Carrying Out the Invention
[0028] An embodiment of the present invention will be explained below
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with reference to a plurality of accompanying drawings. Further, it is to
be noted that the same portions or corresponding portions are denoted by
the same reference numerals in the plurality of accompanying drawings.
[0029] Fig. 1 is a schematic view showing an example of an
arrangement of a transmission device 1 according to the embodiment of the
present invention and a method of connecting the transmission device 1 to
a solar cell.
[0030] As shown in Fig. 1, in the transmission device 1, a pair of input
terminals la, lb are electrically connected to the solar cell 2 through a pair
of two-wire input side cables Cia, Cib, whereas a pair of output terminals
lc, ld are electrically connected to an inverter 3 as an example of a load
through a pair of two-wire output side cables Coa, Cob. The respective
pairs of input side cables Cia, Cib and pairs of output side cables Coa, Cob
are a kind of a conventional power cable, for example, AWG, KIV, or the
like.
[0031] In the transmission device 1, a transmission line 4 as an
example of a transmission medium shown in Fig. 2(A) is wound around the
outer peripheral surface of a cylindrical or columnar core 5 made of ferrite
as an example of a magnetic body by a required number of turns (for
example, 10 turns). The core 5 is arranged so as to provide such
permeability that the transmission device 1 generates series resonance to
the frequency oscillated by the solar cell 2. The core 5 and the
transmission line 4 are accommodated in an accommodation box 6 as an
example of a vessel made of, for example, a synthetic resin and the like
having electric insulation. The accommodation box 6 has the input
terminals la and lb and the output terminals lc and 1 d disposed on the
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outer surface thereof, respectively. The accommodation box 6 may be
arranged as a closed vessel having a waterproof structure and a magnetic
shield structure or may be arranged so as to be forcibly cooled.
[0032] As shown in Fig. 2(A), the transmission line 4 includes first and
second lines # 1 and #2 as first and second linear conducting wires, which
are disposed approximately in parallel with each other at a predetermined
interval W, and third and fourth curved lines #3 and #4 as third and fourth
conducting wires, which are wound by many turns between the first and
second lines # 1 and #2 in a longitudinal direction of the first and second
lines # 1 and #2 in an approximate 8-shape in a phase different by
approximately 180 .
[0033] Conducting wire surfaces of the respective lines # 1 to #4 are
covered with insulation films. However, it is not necessarily to be covered
with the insulation films if the conducting wires of the lines # 1 and #4 are
not contacting each other. The respective lines # 1 to #4 may be composed
of an ordinary conductive wire, and any type of conductive materials such
as copper, aluminum and the like may be employed. The distance of the
interval W between the first and second lines # 1 and #2 is, for example,
about 4 mm, and the interval S of the position at which the third and
fourth curved line lines #3 and #4 are entangled with the first and second
lines # 1 and #2 is about 5 mm. However, these intervals may be
appropriately selected according to a using condition of the transmission
line 4. Further, the first and second lines # 1 and #2 are not necessarily
straight lines and may be curved lines as far as being disposed
approximately in parallel with each other.
[0034] The transmission line 4 has a significant feature in, for
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example, an entangling portion in which the third and fourth curved lines
#3 and #4 are entangled with the first and second lines #1 and #2, and in a
knit structure. More specifically, as shown in Fig. 2(A), as to the chevron-
shaped or sine wave-shaped third and fourth curved lines #3 and # 4, at
the entangled position P1, the third curved line #3 is entangled with the
second line #2 positioned below the second line #2 in the figure in such a
manner of being bent so as to run round from a front (i.e, upper) side to a
distal (i.e, lower) side in the figure, and at the adjacent entangled position
P2, the third line #3 is entangled with the first line # 1 in the figure in
such
a manner of being bent so as to run round from a lower side of the line # 1
toward the upper side thereof.
[0035] Further, the third curved line #3 is entangled with the second
line #2 so as to be bent from the upper side thereof to the lower side
thereof at an adjacent entangling position P3, is entangled with the first
line # 1 located at an upper position in the figure from the lower side
thereof to the upper side thereof at an entangling position P4, and is
entangled with the second line #2 from the upper side thereof to the lower
side thereof at an entangling position P5, and thereafter, the third curved
line #3 is entangled and knitted likewise. Accordingly, the entangling
positions (entangling portions) Pl to P5 of the curved line #3 are repeatedly
wound in the longitudinal direction of the first and second lines # 1 and #2.
[0036] In contrast, in Fig. 2(A), the fourth curved line #4 is entangled
with the first line # 1 located at the upper position in the figure in such a
manner of being bent so as to run round from the lower side thereof to the
upper side thereof at the entangling position P1 and is entangled with the
second line #2 so as to be bent from the upper side thereof to the lower
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side thereof at the entangling position P2. Further, the fourth curved line
#4 is entangled with the first line # 1 so as to be bent from the lower side
thereof to the upper side thereof at the adjacent entangling position P3, is
entangled with the second line #2 so as to be bent from the upper side
thereof to the lower side thereof at entangling position P4, and is entangled
with the first line # 1 so as to be bent from the lower side thereof to the
upper side thereof at the entangling position P5, and thereafter, the fourth
curved line #4 is entangled and knitted likewise. Accordingly, the
entangling positions Pl to P5 of the fourth curved line #4 repeatedly appear
in the longitudinal direction of the first and second lines # 1 and #2.
[0037] At the entangling positions P 1 to P5, the third and fourth
curved lines #3 and #4 are entangled so as to be bent round from the lower
side to the upper side of the first line # 1 on the first line # 1 side. In
contrast, on the second line #2 side, the third and fourth curved lines #3
and #4 are tangled so as to be bent round from the upper side to the lower
side of the second line #2, and thus, the run-round direction thereof, i.e.
the winding direction of the first line #1, is reversed from that the second
line #2.
[0038] More specifically, as shown in Fig. 2(A), at the respective
entangling portions PO to Pn of the first line # 1 located at the upper
position in the figure, the straight third and fourth curved lines #3 and #4
run round from the lower (distal) side to the upper (front) side of the first
line # 1 in the figure and are wound by being bent at a required angle such
as right angles and the like.
[0039] In contrast, in Fig. 2(A), at the entangling portions P0 to Pn of
the second line #2 located at a lower position, the curved third and fourth
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curved lines #3 and #4 run round from the upper (front) side to the lower
(distal) side of the second line #2 in the figure as well as wound at a
required angle, substantially, right angles, and the winding direction
thereof opposites to that of the first line # 1. Accordingly, it is supposed
that a horizontal center line, not shown, which travels in parallel with the
first and second lines # 1 and #2, is made as a symmetric axis at the
intermediate points in the separating direction of the first and second lines
# 1 and #2, the winding directions in the entangling portions P0 to Pn of the
first and second lines # 1 and #2 are made asymmetric.
[0040] Intersecting portions C1, C2, ..., Cn, at which the third curved
line #3 intersects with the fourth curved line #4 at a required angle such as
right angles, are formed at the respective intermediate portions in the
longitudinal direction of the respective entangling portions P0 to Pn of the
respective lines #1 to #4. At the intersecting portions C1, C2, ..., Cn, one
of the third and fourth curved lines #3 and #4 passes (i.e., extends) on the
upper (front or proximal) side of the other curved line, and the third and
fourth curved lines #3 and #4 intersect with each other so that the
overlapping direction thereof is sequentially reversed in the longitudinal
direction of the first and second lines # 1 and #2.
[0041] For example, at the left intersecting point C1 in Fig. 2(A), the
fourth curved line #4 passes on the upper side of the third curved line #3,
and at the next intersecting point C2, the third curved line #3 passes on
the upper side of the fourth curved line #4, and, at the subsequent
intersecting portions C3 to Cn, a line passing on the upper side thereof is
sequentially reversed to the fourth curved line #4, the third curved line #3,
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[0042] As shown in Fig. 2(B), when a current i is supplied to the
transmission line 4 shown in Fig. 2(A) from an input (in) on the entangling
portion P0 side to an output (out) side, variable vertical magnetic fields N
of
an N-pole, for example, are formed to the respective approximately
triangular spaces ma, ma, ..., ma formed by being surrounded by the first
line #1, and the third and fourth curved lines #3 and #4, respectively.
[0043] Further, variable vertical magnetic fields S of an S-pole, for
example, are formed, respectively, to the respective approximately
triangular spaces mb, mb, ..., mb formed by the second line #2, and the
third and fourth curved lines #3 and #4, respectively. The N- and S-pole
variable vertical magnetic fields sequentially move along the longitudinal
direction of the first and second lines # 1 and #2.
[0044] Accordingly, it will be understood that the transmission line 4
achieves a so-called self-exciting electron accelerating operation for
accelerating the electrons of the current passing in the respective lines # 1
to #4 by the variable vertical magnetic fields N and S. More specifically, it
will be said that the transmission device 1 is a self-exciting electron
accelerator. Note that the arrangement of the multi-transmission line 4 is
approximately the same as the transmission medium having substantially
the same structure as that previously applied by the same applicant
(PCT/JP2008/066426), and the mathematical consideration and
theoretical consideration of the operation/working effect of the multi-
transmission line 4 is the same as those of the transmission medium.
[0045] As also shown in Fig. 3, the transmission line 4 constitutes one
approach path by coupling the input ends (IN) of the third and fourth
curved lines #3 and #4 with each other and the output ends (OUT) thereof
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with each other, and further constitutes one return path by coupling the
input ends (IN) of the first and second curved lines # 1 and #2 with each
other and the output ends (OUT) thereof with each other.
[0046] As shown in Fig. 1, in the transmission line 4 arranged as
described above, the respective input ends "IN" of the approach paths (#3,
#4) and the return paths (# 1, #2) are electrically connected to the internal
ends of a pair of input terminals la and 1 b, and the respective output ends
"OUT" thereof are electrically connected to the internal ends of a pair of
output terminals 1 c and 1 d.
[0047] Further, in the transmission line 4, the input terminal la of the
approach paths (#3, #4) is connected to, for example, a plus (positive)
electrode of the solar cell 2 through the input side cable Cia, and the input
terminal lb of the return paths (#1, #2) is electrically connected to a minus
(negative) electrode of the solar cell 2 through the input side cable Cia.
However, the positive and negative polarities of the electrodes of the solar
cell 2 to which the pair of input terminals la and lb are connected may be
reversed.
[0048] Further, a plurality of the transmission lines 4 may be
connected in parallel with each other and wound around the outer
periphery of the core 5. According to this arrangement, the amount of a
current flowing in the transmission line 4 may be increased by the number
of the parallel transmission lines. Further, the current capacity of the
respective conducting wires # 1 to #4 of the transmission line 4 can be
increased by increasing the diameter thereof. However, since when the
respective conducting wires # 1 to #4 are knitted, a large amount of power
is required due to the increase of the diameter thereof, and since the
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knitting becomes difficult, so that the connection of a plurality of the
transmission lines 4 composed of thin conducting wires in parallel with
each other can easily increase the power.
[0049] Fig. 4 shows a schematic mode representing a result of
experiment in a case when distribution of intensity of radiated
electromagnetic wave of the transmission line 4 was measured, wherein R1
to R5 are regions showing radiated intensities (Vpp (mv)), in which Rl is
strongest in intensities and the intensities are gradually weakened toward
R5. However, it is to be noted that the intensity distribution is only
tentatively shown by the 5 steps (R 1 to R5) for the sake of convenience of
explanation, and in an actual phenomenon, the intensity distribution
continuously changes.
[0050] The an experiment method mentioned above will be explained
hereunder.
[0051] First, a signal source was connected to the input side "IN" of
the transmission line 4, and a resistor of 50 Q was connected to the output
side "OUT" thereof as a load. A balance connection without grounding
was employed as the connection method assuming a use in the solar cell 2.
[0052] Next, a required signal of, for example, a sine wave having 10 V
and 15 to 80 MHz was applied from the signal source, and the intensity of
the electromagnetic wave radiated from the transmission line 4 was
measured by a small loop antenna connected to an oscilloscope.
[0053] The loop antenna was automatically controlled as to the angle 0
between the three directions X, Y, Z of the transmission line 4 shown in Fig.
and the antenna surface of the loop antenna ANT shown in Fig. 6, in
which a signal transmitting direction was shown by X, a line width
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direction was shown by Y, and an antenna height was shown by Z.
[0054] Further, the measurement range of X, Y was set to 0 S X<_ -
130 mm, and the antenna height Z was visually set to about 1 to 2 mm
from the upper surface of the transmission line 4. The antenna angle 0
was set to 0 when an antenna surface is in parallel with the X-direction,
and the intensity of the electromagnetic wave was measured at 45 , 90
and 135 , respectively. Further, in Fig. 6, the right end column in the
columns showing the respective antenna angles shows the perspective
shapes of the loop antenna at the respective angles.
[0055] As shown in Fig. 4, it was found in the experiment that the
electromagnetic wave intensity was strongest at the centers of the
respective intersecting portions Cl to C5, Cn of the transmission line 4 and
gradually weakened toward the centrifugal external direction.
[0056] It was also found that the external peripheries of the intensity
regions R5 in the central portions of the intersecting portions Cl to Cn, in
which the radiation intensity was strongest, were approximately
concentrically surrounded, and for example, the regions R5 were
surrounded double by both the regions R3 and R4 which are weaker than
the regions R5 by two stages and coupled with each other, respectively, in
the longitudinal direction of the transmission line 4 of both the regions R3,
R4, i.e, in the signal transmitting direction.
[0057] It was also found that the electromagnetic wave intensities
distributed just above the first and second lines # 1 and #2 and in the
peripheries thereof were region R4, which was as weak as almost zero, and
that the regions R 1 to R3 stronger than the region R4 were not distributed.
Further, since the electromagnetic wave energies outside of the first and
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second lines # 1 and #2 were almost zero, the strongest electromagnetic
wave energy generated in the respective intersecting portions C 1 to Cn did
not diffuse outward, that is, did not leak and was substantially entirely
transmitted in the transmitting direction X on the Cn side from the
intersecting point C1 side, i.e., from the input side of the transmission line
4 to the output side thereof.
[0058] Accordingly, the variable vertical magnetic fields N, S generated
above and below the respective intersecting portions C 1 to Cn shown in Fig.
2 are strong, and the electron accelerating operation for accelerating the
electrons of the current flowing in the respective lines # 1 to #4 is also
improved.
[0059] Incidentally, the solar cell 2 may use any one of a crystal solar
cell such as a single and polycrystal silicon solar cell, a thin film solar
cell,
a hybrid solar cell thereof, a compound solar cell of CIGS (Cu-In-Ga-Se),
CdFe, and the like as long as having a photoelectric conversion function.
[0060] The inverter 3 is of a type converting the electricity obtained
from the solar cell 2 from a direct current to an alternating current and
may be accommodated in a power conditioner added with a function for
keeping power quality to a predetermined level and for associating systems.
[00611 The solar cell 2 is not a simply direct current source and
oscillates (diode oscillation) a high-frequency of, for example, the order of
MHz such as 13.5 MHz and outputs the high-frequency component
after it is superimposed to a direct current component as a ripple.
[0062] Since the high-frequency component flows on the surface sides
of the respective lines 1 to 4 due to the skin effect, an electronic
acceleration effect is further improved by the variable vertical magnetic
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fields N and S. Accordingly, the amplitude attenuation (voltage drop) and
the phase delay of the transmitted power are reduced together, and the
transmitting efficiency thereof can be improved.
[0063) That is, when a power cable having high impedance is
connected to the solar cell 2 as in a conventional case, since the high-
frequency component of the power obtained by the solar cell 2 is almost
entirely converted to heat by the internal resistance of the solar cell 2
itself,
the transmitting efficiency of the power is not available.
[0064] However, the transmission device 1 of the present invention is
arranged to execute the series resonance by selecting the inductance L and
the capacitance C of the transmission line 4 and the core 5 so that the
transmission device 1 resonates the oscillating frequency of the solar cell 2.
The inductance L of the transmission device 1 can be adjusted by, for
example, the magnetic permeability of the core 5. Accordingly, the
impedance of the transmission device 1 can be applied to the inverter 3 of
the load after it is reduced to almost zero with respect to the high-
frequency component of the oscillating frequency in the power from the
solar cell 2.
[0065] Further, since the high-frequency component generated in the
solar cell 2 can be more efficiently transmitted to the load 3 by the
transmission device 1, the amount of heat, which is obtained by converting
the high-frequency component to heat by the internal resistance of the
solar cell 2, can be reduced. Accordingly, since the amount of heat
generated by the solar cell 2 can be suppressed, deterioration of a power
generation performance due to an increase of temperature of the solar cell
can be suppressed.
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[0066] Figs. 7 and 8 show the data of an experiment executed by the
inventor on October 28, 2008 in Saku City, Nagano Prefecture, Japan to
measure the power transmission characteristics of the transmission device
1. Fig. 7 shows graphs of the variation of the power transmitted to the
inverter 3 in one day in a case in which one panel of the 110 W spherical
solar cell 2 was used as the solar cell 2 and the transmission device 1 was
assembled thereto (shown by a curve (A)) and in a case in which the.
transmission device 1 was removed and the input and output side cables
Cia and Coa, and Cib and Cob were directly coupled with each other
(shown by a curve (B)). In Figs. 7 and 8, an illuminance curve (C) is a
graph showing the variation of illuminance in one day when sunlight was
radiated to the solar cell 2.
[0067] As shown in the curve A of Fig. 7, the transmitted power when
the transmission device 1 was inserted in series between the solar cell 2
and the inverter 3 exceeds the power represented by the characteristic
curve B when the transmission device 1 was removed in the entire time
interval of daily sunlight time. Further, as shown in Fig. 8, it was found
that the transmitted power per hour was, for example, about 469 [wh] in
the case of A in which the transmission device 1 was provided (A) and
about 369 [wh] in the case of B in which the transmission device 1 was
removed, and that in the former case A, the transmitted power was
increased by about 25% as compared with the latter case B. Accordingly,
it is considered to be possible to achieve further improvement of the
transmitted power, that is, to improve the transmitted power, for example,
by about 75% by appropriately connecting a plurality of the panels of the
solar cells 2 in series and in parallel with each other.
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[0068] Fig. 8 shows graphs for comparing a characteristic curve "a",
which shows the variation of the transmitted power in one day when one
sheet of a single crystal panel (110W) was used as the solar cell 2 with a
characteristic curve "b" when the transmission device 1 being removed.
As shown in Fig. 8, the characteristic curve "a" in the case of being
provided with the transmission device 1 exceeds the characteristic curve
"b" in almost all the time region of the sun-shining. Furthermore, it was
found that the transmitted power per hour was about 183 [Wh] in the case
of "a" in which the transmission device 1 was provided and was improved
about 11% as compared with about 164 [Wh] in the case of "b" in which
the transmission device 1 was not provided.
[0069] That is, according to the transmission device 1 of the present
invention, the power generation efficiency of the solar cell 2 can itself be
improved, and in addition, the power obtained by the solar cell 2 can be
efficiently transmitted to the load such as the inverter 3.
[0070] Further, the transmission line 4 (refer to Fig. 4) of the
transmission device 1 may be replaced with a transmission line 4A shown
in Fig. 9. This transmission line 4A has a feature in that when the third
and fourth curved lines #3 and #4 are entangled with the first and second
linear lines # 1 and #2, the third curved line #3 and the fourth curved line
#4 always intersect with each other after they run round the first and
second lines # 1 and #2 from the lower sides (back surface sides of Fig. 9) to
the upper sides (front surface sides in Fig. 9), and the other arrangement of
the transmission line 4A is approximately the same as the transmission
line 4 shown in Fig. 2.
[00711 In such transmission line 4A, the variable vertical magnetic
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fields N and S are formed to approximately triangular space portions "ma"
and "mb", which are formed by the intersecting portions C 1 to Cn of the
third and fourth curved line #3 and #4 and the first and second lines #1
and #2, respectively, as like as in the transmission line 4. Accordingly, the
transmission line 4A has so-called a self-exciting electron accelerating
function. Thus, substantially the same power transfer efficiency as that in
the transmission line 4 can be achieved. Particularly, the power generation
efficiency of the solar cell 2 can itself be improved as well as the
transmission efficiency of the power obtained by the solar cell 2 can be
remarkably improved.
[0072] Further, although in the embodiment described above, there is
described the case in which the solar cell 2 is used as the signal source
and the power source of the transmission device 1, the present invention is
not limited thereto, and the transmission device 1 may be used simply for a
power transmission without using as signal source and power source other
than the solar cell 2.
[0073] Further, although in the embodiment described above, there is
described the case in which the solar cell 2 is used as the signal source
and the power source of the transmission device 1, the present invention is
not limited thereto, and the transmission device 1 may be used simply for a
power transmission without using as signal source and power source other
than the solar cell 2.
Industrial Applicability
[0074] According to the present invention, there can be achieved an
effect of reducing both the amplitude (voltage) attenuation and the phase
delay of the power caused by the power transmission. In addition, the
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power generation efficiency of the solar cell itself can be improved as well
as the transmission characteristics can be improved in the case where the
power obtained by the solar cell is transmitted to the load such as the
inverter.
