WO2017146082A1

WO2017146082A1 - Power supply system

Info

Publication number: WO2017146082A1
Application number: PCT/JP2017/006520
Authority: WO
Inventors: 原川　健一
Original assignee: 株式会社ＥｘＨ
Priority date: 2016-02-22
Filing date: 2017-02-22
Publication date: 2017-08-31
Also published as: JPWO2017146082A1

Abstract

The purpose of the present invention is to provide a method for stably increasing junction capacitance, and increasing safety by reducing electromagnetic radiation, and for increasing resistance to contamination by dust or the like. Provided is a power supply system to which field coupling power transmission technology is applied. A power transmission part 1 transmits power from a power source Vf having a predetermined wavelength. A power reception part 2 has a comb-shaped power reception electrode 22, and moves along the power transmission part 1. Locations on the power transmission part 1 that face the comb-shaped power reception electrodes 22 constitute multi-groove power transmission electrodes 12. The power reception part 2 receives power from the power transmission part 1 via a plurality of junction capacitors Cc formed by the multi-groove power transmission electrodes 12 and the comb-shaped power reception electrodes 22, and supplies the power to a load R. The power reception part 2 further includes, as a component thereof, a head fixing part 223, which is a spring member, and is movable along a curved part C of the power transmission part 1, with power being supplied to the load R.

Description

Power supply system

The present invention relates to a power supply system.

Conventionally, techniques for increasing the junction capacitance when supplying power by electric field coupling have been disclosed (see Patent Documents 1 and 2).

JP 2014-007200 A Japanese Patent Laying-Open No. 2015-099880

However, in the techniques of

Patent Documents

1 and 2, since the power receiving electrode portion and the power transmitting electrode portion are exposed, a measure for reducing electromagnetic radiation and an electric shock that may occur due to human contact are prevented. No measures have been taken, such as measures to prevent waste contamination. Moreover, it does not have the correspondence to the track | line which has a curved part.
As described above, the conventional techniques including

Patent Documents

1 and 2 have a problem in that the range of use is limited because the above-described problems exist.
In addition, when using a feather touch electrode where the electrodes are lightly in contact with each other, it is possible to increase the junction capacity, reduce electromagnetic radiation, and have resistance to contamination, but the electrodes are completely non-contact. These cannot be realized in the state.

The present invention has been made in view of such a situation, and solves the above-mentioned problem fundamentally, increases the junction capacitance stably, reduces electromagnetic radiation, and prevents electric shock. An object of the present invention is to provide a technique for enhancing the resistance and further enhancing the resistance to contamination of dust and the like.

In order to achieve the above object, a power supply system according to an aspect of the present invention includes:
A power supply system using electric field coupled power transmission technology,
A power transmission line for transmitting power from an AC power source of a predetermined wavelength;
A plurality of junction capacitors formed by the power transmission electrode and the power receiving electrode, having a power receiving electrode, moving along the power transmission line, and using a portion of the power transmission line facing the power receiving electrode as a power transmitting electrode A power receiving unit that receives power from the power transmission line via the power supply and supplies the power to a load;
With
The power receiving unit includes a spring-like member as a component, and is movable along a curved portion of the power transmission line in a state where power is supplied to the load.

In addition, the junction capacitance can be formed in a state where the power transmitting electrode and the power receiving electrode are arranged opposite to each other in a nested manner.

Further, in the vicinity of the plurality of power transmission electrodes and on the AC power supply side, a power transmission side conductive plate disposed in a noncontact manner with respect to the plurality of power transmission electrodes, and
A power-receiving-side conductive plate that is disposed in the vicinity of the plurality of power-receiving electrodes and on the load side in a noncontact manner with respect to the plurality of power-receiving electrodes;
Further comprising
The power transmission side conductive plate and the power reception side conductive plate may be disposed so as to sandwich the power transmission electrode and the power reception electrode from the outside in a state where the power transmission side conductive plate and the power reception side conductive plate protrude outside the ends of the power transmission electrode and the power reception electrode. it can.

Further, of the power transmission side conductive plate and the power reception side conductive plate, a portion that protrudes outside the end portions of the power transmission electrode and the power reception electrode has a curved portion, and an end portion of the power transmission side conductive plate It is possible to maintain a state where the end portions of the power receiving side conductive plate are close to each other.

The power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A rotating shaft, and a power transmission electrode composed of a plurality of layers of flat plates electrically insulated from the rotating shaft,
The power receiving unit
A stationary body arranged around the rotating shaft, and a power receiving electrode composed of a plurality of layers of flat plates fixed to the stationary body in a state of being electrically insulated from the stationary body and the power transmission electrode,
The power transmitting electrode and the power receiving electrode are arranged opposite to each other in a nested manner.

The power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A fixed body disposed around a rotating shaft, and a power transmission electrode composed of a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the power receiving electrode,
The power receiving unit
The rotating shaft, and a power receiving electrode comprising a plurality of layers of flat plates electrically insulated from the rotating shaft,
The power receiving electrode and the power transmitting electrode are arranged opposite to each other in a nested manner.

The power supply system to which the present invention is applied is
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
A first electrode group comprising a rotating shaft and a plurality of layers of flat plates electrically insulated from the rotating shaft;
A fixed body disposed around the rotating shaft, and a second electrode group composed of a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the first electrode;
Are placed opposite each other in a nested manner,
When the first electrode group is the power receiving electrode and the second electrode group is the power transmitting electrode, and the rotation axis is included in a part of the circuit, a part of the first electrode group Even when in contact with the rotating shaft, power can be supplied to the load via the junction capacitance.
Further, when the first electrode group is the power receiving electrode and the second electrode group is the power transmission electrode, and the fixed body is included in a part of the circuit, the second electrode group Even when a part of the fixed body is in contact with the fixed body, electric power can be supplied to the load through the junction capacitance.
Further, even when the first electrode is the power transmitting electrode and the second electrode is the power receiving electrode, power can be supplied to the load.

Further, the power transmitting electrode and the power receiving electrode can be separated from each other by the presence of the fluid flowing between the power transmitting electrode and the power receiving electrode.

According to the present invention, in a line having a rotating body and a curved portion, when power is transmitted, the junction capacitance is stably increased, electromagnetic radiation is reduced, and safety is improved by preventing electric shock. Furthermore, it is possible to increase the resistance against contamination of dust and the like.

It is a circuit diagram which shows the example at the time of forming junction capacity | capacitance by a sandwich electrode among the electric power transmission circuits to which an electric field coupling electric power transmission technique is applied. It is a figure which shows a feather touch curved comb-shaped receiving electrode with a head as an example of the comb-shaped receiving electrode corresponding to the multi-groove power transmitting electrode which has a curved part. It is a figure which shows a hinge-shaped comb-shaped receiving electrode as an example of the comb-shaped receiving electrode corresponding to the multi-groove power transmitting electrode which has a curved part. It is a figure which shows the feather-touch type comb-shaped receiving electrode with a wheel as an example of the comb-shaped receiving electrode corresponding to the multi-groove power transmitting electrode which has a curved part. It is a figure which shows the comb-shaped receiving electrode with a wheel as an example of the comb-shaped receiving electrode corresponding to the multi-groove power transmitting electrode which has a curved part. It is a figure which shows distribution of the electric field E radiated | emitted outside, when electric power is transmitted from the power transmission side to the receiving side by the electric field coupling | bonding power transmission technique. It is a figure which shows what kind of change arises in the electric field radiated | emitted outside, when a chassis changes with respect to a multi-groove power transmission electrode and a comb-shaped power reception electrode from the retracted state. It is a figure which shows what kind of change arises in the relationship between a radiation electric field strength and distance by overhanging, when the voltage between electrodes is 10V, a frequency is 6.78 MHz, and load resistance is 50 (ohm). It is a figure which shows the example which applied the technique of overhang to the curved receiving electrode. It is a figure which shows the example which has arrange | positioned a pair of positive / negative electrode and the overhang electrode for radiation reduction to each of the inner surface which opposes within one trench. An example in which a positive transmission electrode and a negative transmission electrode are separated from each other by providing a wall serving as a sill inside the trench, and a CAP electrode that reduces electromagnetic radiation is disposed thereon is shown. FIG. It is a figure which shows the example which uses trench itself as a GND electrode. It is a figure which shows the example at the time of attaching an ultra-thin metal cover to the whole trench type power transmission rail. It is a figure which shows the example of the electric power transmission bearing which has an electrode of a sandwich structure. It is a step view which shows the relationship between a circuit and a shield in the bearing which has two sets of sandwich electrodes. It is a figure which shows the example of the circuit of a high power type electric power transmission bearing. It is a figure which shows the fixing method of the rotating shaft by a shaft fixing block. It is a figure which shows the method of fixing an insulating bellows plate to a rotating shaft. It is a figure which shows the method of attaching a rotor electrode to a rotating shaft using a shaft fixed block. It is a figure which shows the other method of attaching the rotor electrode of a half crack shape to a rotating shaft. It is a figure which shows the half crack method as an example of the method of attaching a stator electrode to a rotating shaft. It is a figure which shows the opening method as an example of the method of attaching a stator electrode to a rotating shaft. It is a figure which shows the example of the electric power transmission bearing which injects a fluid between a rotary body electrode and a fixed body electrode.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram showing an example in which a junction capacitance Cc is formed by a sandwich electrode in a power transmission circuit to which an electric field coupling power transmission technique is applied.

As shown in FIG. 1, the power transmission circuit to which the electric field coupling power transmission technology is applied includes a power transmission unit 1 and a power reception unit 2.
The electric field coupling power transmission technology is a technology that realizes non-contact power transmission by flowing a high-frequency current in a state where a junction capacitance Cc is formed by an electrode pair made of opposing metal plates.
That is, the multi-groove power transmitting electrode 12 made of a metal plate is connected to the end of the power transmitting unit 1 that transmits power from the power source Vf, and the comb-shaped power receiving electrode 22 made of a metal plate is attached to the tip of the power receiving unit 2 that receives the power and supplies it to the load R. Are arranged so as to face each other to form a junction capacitance Cc, and an electric field coupling power transmission technique is realized.

Here, the sandwich electrode refers to an electrode pair in which a comb-shaped power receiving electrode 22 that is a comb-shaped power receiving electrode is nested in a multi-groove power transmitting electrode 12 that is a power transmitting electrode having a plurality of grooves. In this manner, by nesting the power transmission electrode and the power reception electrode, the area of the portion where the power transmission electrode and the power reception electrode face each other can be efficiently increased, so that the junction capacitance Cc can be efficiently increased.
In addition, what uses a sandwich electrode can be adopted not only for a slide rail type electrode described later with reference to FIG. 2, but also for a bearing type electrode described later with reference to FIG.

The power transmission unit 1 includes a parallel resonant circuit 11, a multi-groove power transmission electrode 12, and a transformer T1. Since the AC power source Vf is connected to the power transmission unit 1, the power transmission unit 1 can receive power from here.
The parallel resonant circuit 11 includes a capacitor C1 and a coil L2. An AC power supply Vf is connected to the parallel resonance circuit 11 via a transformer T1. That is, the parallel resonant circuit 11 is configured by connecting the capacitor C1 and the coil L2 in parallel with each other.
Further, the coil L1 is adopted as the primary winding and the coil L2 is adopted as the secondary winding, thereby forming the transformer T1.
Here, the ratio of the number of windings of the coil L1 and the number of windings of the coil L2 is 1: n. For this reason, the voltage on the primary side, that is, the voltage of the AC power supply Vf is boosted n times in the transformer T1 and applied to the parallel resonant circuit 11.
In addition, two multi-groove power transmitting electrodes 12 are connected to both ends of the parallel resonant circuit 11.

The power receiving unit 2 includes a parallel resonant circuit 21, a comb-shaped power receiving electrode 22, and a transformer T2.
The parallel resonant circuit 21 includes a capacitor C2 and a coil L3. A comb-shaped power receiving electrode 22 of the power receiving unit 2 is connected to the parallel resonant circuit 21. That is, the parallel resonant circuit 21 is configured by connecting the capacitor C2 and the coil L3 in parallel with each other.
Further, the coil L3 is employed as the primary winding, and the coil L4 is employed as the secondary winding, whereby the transformer T2 is configured.
Here, the ratio of the number of turns of the coil L3 and the number of turns of the coil L4 is n: 1. For this reason, the voltage on the primary side, that is, the voltage received by the power receiving unit 2 and applied to the parallel resonance circuit 21 is stepped down 1 / n times by the transformer T2 and applied to the load R.

From here, the example in case the multi-groove power transmission electrode 12 is a slide rail type | mold is demonstrated.
FIG. 2 is a diagram showing a head-attached feather-touch curved comb-shaped power receiving electrode 22 as an example of a comb-shaped power receiving electrode 22 corresponding to the multi-groove power transmitting electrode 12 having a curved portion.
FIG. 2A is a cross-sectional plan view showing a state in which a pair of comb-shaped power receiving electrodes 22 are arranged on the curved portion of the multi-groove power transmitting electrode 12 including two grooves. In the example of FIG. 2, the number of grooves of the multi-groove power transmission electrode 12 is composed of two lines, but the number of grooves is not limited to two.
As shown in FIG. 2A, when the multi-groove power transmitting electrode 12 has a curved portion C, the comb-shaped power receiving electrode 22 is deformed in accordance with the shape of the curved portion C when positioned at the curved portion C, and is The groove power transmission electrode 12 and the power reception electrode part 221 do not contact.
FIG. 2B is a cross-sectional front view showing a state where the comb-shaped power receiving electrode 22 is inserted into the multi-groove power transmitting electrode 12.
As shown in FIG. 2B, the comb-shaped power receiving electrode 22 is connected and fixed by the electrode fixing rod 224 so that two power receiving electrode portions 221 form a pair.

FIG. 2C is a plan view showing an outline of the comb-shaped power receiving electrode 22.
FIG. 2D is a side view showing an outline of the comb-shaped power receiving electrode 22.
As shown in FIGS. 2C and 2D, the comb-shaped power receiving electrode 22 has a three-layer structure including a power receiving electrode portion 221, an elastic body 222, and a head fixing portion 223. Head portions 225 are disposed at both ends of the comb-shaped power receiving electrode 22.
The power receiving electrode portion 221 is formed of an extremely thin metal plate having conductivity. The elastic body 222 is configured by an elastic foam body or the like, but is not particularly limited to a foam body. The head fixing portion 223 is formed of an extremely thin metal plate having spring properties. As described above, the electrode fixing rod 224 connects and fixes a plurality of power receiving electrode portions 221 in a set. The head portion 225 is connected to a conductive wire disposed in the electrode fixing rod 224 and functions as an electrode that actually receives power.
Moreover, the head fixing | fixed part 223 has the following function.
That is, (a) it functions as an overhang electrode described later, and does not conduct with the power receiving electrode portion 221. (A) The head portion 225 that protects the end portion of the comb-shaped power receiving electrode 22 is fixed. The head fixing portion 223 prevents the lengths of the end portions of the two power receiving electrode portions 221 from being different when the comb power receiving electrode 22 is curved, and connects the multi-groove power transmitting electrodes 12 to each other. The comb-shaped power receiving electrode 22 is prevented from being caught at the step portion of the eye. (C) The elastic body 222 for fixing the power receiving electrode portion 221 is fixed. The method for fixing the elastic body 222 is not particularly limited. Specifically, for example, the elastic body 222 may be fixed by sticking a foam body adopted as the elastic body 222 with a double-sided tape. The elastic body 222 supports the power receiving electrode portion 221. Further, when the power receiving electrode portion 221 is positioned at the curved portion C, the power receiving electrode portion 221 is deformed so as to widely face the inner wall surface of the multi-groove power transmitting electrode 12. (D) The head fixing portion 223 has a spring property and has a function of extending the power receiving electrode portion 221 straightly. (E) It is mechanically connected to the electrode fixing rod 224 and supports the entire comb-shaped power receiving electrode 22.

FIG. 3 is a diagram illustrating a hinge-type comb-shaped power receiving electrode 22 as an example of the comb-shaped power-receiving electrode 22 corresponding to the multi-groove power transmitting electrode 12 having a curved portion.
FIG. 3A is a plan view showing an outline of the hinge-type comb-shaped power receiving electrode 22.
FIG. 3B is a side view showing an outline of the hinge-type comb-shaped power receiving electrode 22.
As shown in FIG. 3, the hinge-type comb-shaped power receiving electrode 22 has five blocks (center block A and hinge blocks B to E) connected by hinge pins 235. Note that the number of blocks is not limited to five. Since the hinge pin 235 is provided with a wheel 233, the power receiving electrode portions 231 of each block are not in contact with each other. Further, since the spring member 234 is inserted through all the blocks, the entire comb-shaped power receiving electrode 22 can be maintained in a straight state unless a force is applied from the outside. Further, in order to improve the electrical connection of each block, the connection line 236 is connected to the conducting wire in the electrode fixing rod 232.
The center block A is mechanically connected to the electrode fixing rod 232.
In the case of the hinge-type comb-shaped power receiving electrode 22, it is not possible to apply a function of suppressing electromagnetic wave radiation by an overhang described later. Further, the hinge-type comb-shaped power receiving electrode 22 is expected to be heavier than other methods.

FIG. 4 is a diagram showing a feather touch comb-shaped power receiving electrode 22 as an example of the comb-shaped power receiving electrode 22 corresponding to the multi-groove power transmitting electrode 12 having a curved portion.
FIG. 4A is a plan view showing an outline of a feather-touch type comb-shaped power receiving electrode 22 with a wheel.
FIG. 4B is a front view showing the outline of the feather-touch type comb-shaped power receiving electrode 22 with a wheel.
As shown in FIG. 4, the wheel-attached feather-touch comb-shaped power receiving electrode 22 has a wheel-fixing metal plate 246 formed of an extremely thin metal plate having spring properties at the center. The wheel fixing metal plate 246 has a function of fixing the wheel 244. An elastic body 247 with a double-sided adhesive is attached to the front and back surfaces of the wheel fixing metal plate 246. Further, on the outside of the elastic body 247, a power receiving electrode portion 241 made of an extremely thin metal plate coated with DLC (diamond-like carbon) is attached. These power receiving electrode portions 241 are connected to a conducting wire 249 in the electrode fixing rod 242.

The power receiving electrode portion 241 is configured to be slightly smaller than the wheel-fixing metal plate 246. For this reason, the wheel fixing metal plate 246 has an overhang radiation reducing function. Furthermore, since the wheel fixing metal plate 246 also has a spring property, the entire comb-shaped power receiving electrode 22 can be maintained in a straight state unless a force is applied from the outside.

When the comb-shaped power receiving electrode 22 of the wheel touch type with touch is adopted, the comb-shaped power receiving electrode 22 can slide and move on the power transmitting electrode surface in the curved portion of the multi-groove power transmitting electrode 12. Cc can be obtained. The wheels 244 are disposed at both ends of the comb-shaped power receiving electrode 22. For this reason, the comb-shaped power receiving electrode 22 can smoothly pass through the stepped portion of the joint of the multi-groove power transmitting electrode 12.
Further, since the surface of the power receiving electrode portion 241 and the surface of the multi-groove power transmitting electrode 12 are in contact with each other at the curved portion of the multi-groove power transmitting electrode 12, the surface of the power receiving electrode portion 241 is hard, lubricous, wear resistant, chemically A DLC film having physical stability, surface smoothness and the like is coated.
Further, the comb-shaped power receiving electrode 22 is provided with an intake / exhaust port 251 on the surface of the power receiving electrode portion 241 through which the electrode fixing rod 242 passes. Gas can be sucked and exhausted from here. The intake / exhaust port 251 is connected to the intake / exhaust port 248.
When the gas is exhausted from the intake / exhaust port 251, the gas is sent between the power receiving electrode portion 241 and the surface of the multi-groove power transmitting electrode 12, so that the interval between the facing electrodes can be increased. In addition, when gas is sucked from the intake / exhaust port 251, the interval can be reduced. Furthermore, the power receiving electrode portion 241 may be vibrated by repeating the intake and exhaust of the gas. By applying vibration to the power receiving electrode portion 241, the coefficient of friction between the power receiving electrode portion 241 and the surface of the multi-groove power transmitting electrode 12 can be reduced.
Furthermore, a substance having a function as a rotary bearing may be dispersed and mixed in the gas to be sucked and exhausted. As a substance to be mixed, fullerene (C60, C70, C76, C78, C82, C84, C86, C88, C90, C92, C94, C96, C116, etc.), a ceramic ball, or the like can be used. In this case, it can be properly used according to the distance between the power receiving electrode portion 241 and the surface of the multi-groove power transmitting electrode 12. Further, the positions of the intake /

exhaust ports

248 and 251 may be shifted in accordance with the moving speed of the comb-shaped power receiving electrode 22.
From the intake / exhaust port 251, gas may be sucked / exhausted, and liquid may be sucked / exhausted.

FIG. 5 is a diagram illustrating a comb-shaped power receiving electrode 22 with a wheel as an example of the comb-shaped power receiving electrode 22 corresponding to the multi-groove power transmitting electrode 12 having a curved portion.
FIG. 5A is a plan view showing an outline of the comb-shaped power receiving electrode 22 with a wheel.
FIG. 5B is a side view showing an outline of the comb-shaped power receiving electrode 22 with a wheel.
As shown in FIG. 5, the example shown in FIG. 5 is obtained by increasing the number of wheels with respect to the example of FIG. 4 (feather touch type comb-shaped power receiving electrode 22 with wheels). In this way, by increasing the number of wheels, the gap between the comb-shaped power receiving electrode 22 and the multi-groove power transmitting electrode 12 can be maintained in a non-contact state.

As in the example of FIG. 4, the intake / exhaust port 251 is provided on the surface of the power receiving electrode portion 261 through the electrode fixing rod 252 in the example of FIG. 5. The intake / exhaust port 251 is connected to the intake / exhaust port 258. Thereby, the space | interval of the receiving electrode part 241 and the surface of the multi-groove power transmission electrode 12 can be adjusted. Further, since the central holding plate 253 has a spring property, the entire comb-shaped power receiving electrode 22 can be maintained in a straight state unless a force is applied from the outside.

FIG. 6 is a diagram illustrating a distribution of the electric field E radiated to the outside when electric power is transmitted from the power transmission side to the power reception side by the electric field coupled power transmission technique.
As shown in FIG. 6, a power transmission unit chassis 111 serving as a conductive plate disposed in a non-contact manner and opposed to the power transmission electrode plate 123 is disposed in the vicinity of the two power transmission electrode plates 123 and on the power supply Vf side. In addition, a power receiving unit chassis 271 serving as a conductive plate disposed in a non-contact manner with respect to the power receiving electrode plate 273 is disposed in the vicinity of the two power receiving electrode plates 273 and on the load R side. In addition, the power transmission unit chassis 111 and the power reception unit chassis 271 are arranged so as to sandwich the electrode plate from the outside in a state of protruding outward from the electrode plate.
At this time, since the power transmission electrode plate 123 is directly connected to the power source Vf, a sufficient charge supply can be received. In contrast, the power receiving electrode plate 273 and the surrounding power receiving unit chassis 271 are neutralized in terms of charge. In this state, when one of the two power transmission electrode plates 123 has a positive charge and the other has a negative charge, a reverse charge is induced in the peripheral metal. The reverse charge is not only induced in the power reception electrode plate 273 but also induced up to the power reception unit chassis 271.

FIG. 7 shows the power transmission electrode plate 123 and the power reception electrode plate 273 when the power transmission unit chassis 111 and the power reception unit chassis 271 (hereinafter simply referred to as “chassis”) change from the retracted state to the protruding state. It is a figure which shows what kind of change arises in the electric field E to radiate | emit.
FIG. 7A is a diagram showing a state of the electric field E when the value of OH is −5.
FIG. 7B is a diagram illustrating a state of the electric field E when the value of OH is zero.
FIG. 7C is a diagram illustrating a state of the electric field E when the value of OH is 5.
FIG. 7D is a diagram showing a state of the electric field E when the value of OH is 10.
FIG. 7E is a diagram showing the state of the electric field E when the value of OH is 15.
For convenience of explanation, only the left electrode in FIG. 6 is enlarged.
Here, the distance that the chassis protrudes from the power transmission electrode plate 123 and the power reception electrode plate 273 is referred to as overhang (or OH). As shown in FIG. 7, when the value of OH is −5, the electrode is exposed to the outside of the chassis, so that a large electric field E is distributed on the outside. However, the electric field E radiated to the outside decreases as OH increases. Thus, the radiation electromagnetic wave can be suppressed by increasing the value of OH.

FIG. 8 is a graph showing changes in the relationship between the radiation electric field strength and the distance caused by overhang (OH) when the voltage between electrodes is 10 V, the frequency is 6.78 MHz, and the load resistance is 50Ω. FIG.
Note that X on the horizontal axis indicates the value of OH, and Y on the vertical axis indicates the absolute value of the radiation field intensity.
As shown in FIG. 8, when the OH value changes from −5 mm to 10 mm, the radiation electric field strength is reduced to about 1/100. Furthermore, even if the value of OH is increased, a particularly great effect cannot be obtained. This can also be seen from the fact that there is no significant difference in the electric field radiated to the outside when comparing FIG. 7D and FIG.

FIG. 9 is a diagram showing an example in which an overhang technique is applied to a curved power receiving electrode.

In the example shown in FIG. 9, in addition to the positive and negative electrodes, a trench T is provided so as to surround these electrodes. The trench T functions as a shield that prevents leakage of electromagnetic waves. Note that the trench T shown in FIG. 9 has a structure in which the upper end portion is open, and thus is insufficient as a shield for preventing leakage of electromagnetic waves. For example, when transmitting kW class power, it is necessary to take additional measures to prevent leakage of electromagnetic waves.

As an additional measure, the above-described overhang (OH) technique can be used. FIG. 9A is a cross-sectional view showing an outline when two opposing positive and negative electrode plates are arranged as power transmission electrode plates P and R inside the trench T. FIG. Since the positive and negative electrode plates arranged as the power transmission electrode plates P and R in the trench T are constituted by long rails, they are power transmission electrode plates extending in the longitudinal direction like the trench T. FIG. 9B is an enlarged view of only one positive / negative power transmission electrode plate of the two sets of positive / negative power transmission electrode plates for convenience of explanation.
On the power receiving electrode side, a power receiving electrode plate Q is disposed facing the power transmitting electrode plate P, and a power receiving electrode plate S is disposed facing the power transmitting electrode plate R. Further, an overhang electrode OH that is overhanged is disposed above the power reception electrode plates Q and S (that is, on the side opposite to the power transmission electrode plates P and R). The overhang electrode OH is not connected to a conducting wire and is in a floating state.

In electric field coupling, power flows through the coupling capacitances Cpq and Crs. However, since the power transmission electrode plate P and the power transmission electrode plate R are directly connected to the power source, a sufficient amount of charge is supplied. On the other hand, when the power receiving electrode plate Q and the power receiving electrode plate S are considered to be integrated, the total amount of charges is neutralized, so that one of the power receiving electrode plate Q and the power receiving electrode plate S is negatively charged. When charge is induced, the same amount of positive charge as that of negative charge is induced on the other electrode. Further, the total amount of charges in the electrode OH and the trench T is zero.

It should be noted here that when the power transmission electrode plate P is given a positive potential and the power transmission electrode plate R is given a negative potential from the power source, opposite charges are induced in the peripheral electrodes, and the power transmission electrode plate P and the power transmission electrode plate The strongest electric field E is generated between Q and Q. The next strongest electric field E is an electric field between the power transmission electrode plate P and the trench T. However, these electric fields are in opposite directions. In this case, it is possible to define an antenna as a device for causing a mutation current to flow in the space. That is, when an electric field (mutation current) flowing around the power transmission electrode plate P flows in the space, this functions as an antenna.
However, when the overhang electrode OH exists and the overhang electrode OH exists overhanging from the power transmission electrode plate P and the power transmission electrode plate Q, the trench T and the overhang electrode OH are induced to have the same polarity. Therefore, the displacement current between them becomes small. That is, the electric field Epq-Ept is localized only in the overhang electrode OH and the trench T, and cannot come out to the external space. Thereby, it is possible to significantly reduce radiated electromagnetic waves.

However, when the power transmission electrode plate P and the power transmission electrode plate R are disposed in the vicinity of the trench T and the overhang electrode OH is disposed in the vicinity of the power reception electrode plate Q and the power reception electrode plate S, the parasitic capacitance increases between these electrodes. Problems arise.
A parallel resonant circuit is effective for this problem. That is, the resonance circuit on the power receiving side originally resonates with the capacitor C2, but the parasitic capacitance C _QOH between the power receiving electrode plate Q and the overhang electrode OH, and the power receiving electrode plate S overhang. Since the capacitance in which the parasitic capacitance C _SOH between the electrode OH and the electrode OH is connected in series becomes the line capacitance, this problem can be solved by setting the value obtained by subtracting the line capacitance from the capacitor C2. Such adjustment is possible because a parallel resonant circuit is used in the power supply system.
In addition, since the overhang electrode OH and the trench T are close to each other across the positive and negative electrode plates, currents (J1, J2) for neutralizing the induced charges flow through these electrodes.

FIG. 10 is a view showing an example in which a pair of positive and negative electrode plates and an overhang electrode OH for reducing radiation are arranged on each of the inner surfaces facing each other in one trench T. FIG.
FIG. 10 is a cross-sectional view showing an outline when opposing positive and negative electrode plates are arranged as power transmission electrode plates P and R inside the trench T. FIG. As in the example of FIG. 9, the positive and negative electrodes arranged as the power transmission electrode plates P and R inside the trench T are constituted by long rails, and thus the power transmission electrodes extending in the longitudinal direction like the trench T. It is a board.
As shown in FIG. 10A, the power receiving electrode plate Q is disposed on the power receiving electrode side so as to face the power transmitting electrode plate P. A power receiving electrode plate S is disposed opposite to the power transmitting electrode plate R. A cable U is provided to neutralize the charge induced in the overhang electrode OH. As shown in FIG. 10B, the overhang electrode OH1 and the overhang electrode OH2 are separated. However, in the examples of FIGS. 2, 4, and 5, one metal plate may be shared. .

By fixing the distance between the overhang electrode OH1 and the power receiving electrode plate Q and the distance between the overhang electrode OH2 and the power receiving electrode plate S, the overhang electrode OH1 and the overhang electrode OH2 can move flexibly. This facilitates the handling of the multi-groove power transmission electrode 12 to the curved portion C and the like. For this reason, the cable U connecting the overhang electrode OH1 and the overhang electrode OH2 is also flexible.
As in the example of FIG. 9, the example of FIG. 10 also projects the overhang electrode OH to the space side from the power transmission electrode plate P, the power reception electrode plate Q, the power transmission electrode plate R, and the power reception electrode plate S. Displacement current flowing in the edge portion of each electrode plate can be prevented from being radiated to the space. As a result, the intensity of the radiated electric field E can be greatly reduced.

In FIG. 11, a CAP electrode 400 that reduces the electromagnetic wave radiation on the positive power transmission electrode plate and the negative power transmission electrode plate separately provided by providing a wall W serving as a sill inside the trench T. It is a figure which shows the example at the time of arrange | positioning.
11 (a) and 11 (b), as in the example of FIGS. 9 and 10, the positive and negative electrodes arranged as power transmission electrode plates P and R inside the trench T are constituted by long rails. Like the trench T, the power transmission electrode plate extends in the longitudinal direction.
Moreover, FIG.11 (c) is the figure which looked at the elongate rail from the side surface, Therefore The power transmission electrode plate P and the receiving electrode plate Q are extended in the right and left.
In the example of FIG. 11, the CAP electrode 400 is used without using the overhang electrode OH. As shown in FIGS. 11A and 11B, the CAP electrode 400 is placed so as to straddle the positive electrode side and the negative electrode side of the trench T. In the CAP electrode 400, opposite charges appear on the surfaces facing the positive electrode and the negative electrode. Similarly, the same charge as that induced in the CAP electrode 400 is also induced on the trench T side. As a result, the potential difference between the CAP electrode 400 and the trench T is extremely small, so that almost no displacement current flows. For this reason, electromagnetic waves are not emitted outside.

As shown in FIG. 11C, the electromagnetic wave emission from the front and rear can be reduced by bending and arranging the CAP electrode 400 in the front-rear direction of the power receiving electrode plate Q serving as a moving body. However, it is necessary to open a through hole through which the power transmission electrode plate P and the power transmission electrode plate R penetrate the CAP electrode 400 at the boundary portion of the trench T.
As described above, the method for reducing electromagnetic wave radiation using the trench T, the overhang electrode OH, and the CAP electrode 400 has been described with reference to FIGS.
Next, a method for causing the trench T itself to function as a GND electrode will be described.

FIG. 12 is a diagram illustrating an example in which the trench T itself is used as the GND electrode.
As shown in FIG. 12, the ground is connected to the trench T as the GND electrode, and one of the power supplies is also grounded. Thereby, since it is not necessary to install a negative electrode inside the trench T, the structure can be simplified.
Furthermore, it is safe even if a person touches the surface of the trench T.

Next, a method for attaching a shield cover to the entire rail (trench T) will be described as a method for suppressing the emission of electromagnetic waves.
FIG. 13 is a diagram illustrating an example in which an extremely thin metal cover 121 is attached to the entire trench type power transmission rail (trench T).
In the example shown in FIG. 13, a metal cover 121 is used for the purpose of preventing dust from entering a uniaxial slider having a ball screw.
FIGS. 13A1, 13B1 and 13C1 are cross-sectional views when the movable body 272 as a power receiver exists in the trench type power transmission rail T. FIG.
FIGS. 13 (a2), (b2), and (c2) are cross-sectional views when the moving body 272 is not present in the trench type power transmission rail T. FIG.
13 (a3), (b3), and (c3) are side views of the trench type power transmission rail T. FIG.

[Correction 28.04.2017 under Rule 91]
In FIG. 13 (a1), (a2), and (a3), the metal cover 121 is comprised by the ultra-thin metal film which consists of a ferromagnetic material.
By using an extremely thin metal film for the metal cover 121, the performance as a shield for preventing leakage of electromagnetic waves can be enhanced.
Many permanent magnets are arranged on the trench type power transmission rail (trench T) side. For this reason, the metal cover 121 can be normally adhered to the trench type power transmission rail T. However, the metal cover 121 is rolled up only when the moving body 272 moves, and passes through a hole that penetrates the moving body 272.
As a method for fixing the metal cover 121 made of an extremely thin metal film to the trench type power transmission rail (trench T), there is the following method in addition to the method using the magnet described above.
That is, (1) applying a tensile force in the front-rear direction, (2) reducing the pressure in the trench type power transmission rail (trench T). (3) Put a weight on the metal cover 121 (use of gravity), (4) Use the spring property of the metal cover 121 itself (that is, press the metal cover 121 with spring pressure), (5) The metal cover 121 and the trench There is a method of making the interface between the power transmission rail (trench T) hydrophilic and fixing it using the surface tension of water.

In the example of FIGS. 13B1, B2, and B3, the metal cover 121 is divided and arranged at the center along the longitudinal direction of the trench type power transmission rail T. In this method, the central opening can be closed using the spring property of the metal cover 121. The metal cover 121 separated at the center may be overlapped.
In the examples of FIGS. 13C1, C2, and C3, the metal cover 121 is fixed to one side of the trench type power transmission rail T. Although normally closed, the moving body 272 can be moved by opening a gap from the side of the trench-type power transmission rail T when the moving body 272 passes over the trench-type power transmission rail T. .
Radiant electromagnetic waves can be further reduced by using the various methods described above.

From here, the power transmission bearing will be described.
The sandwich electrode structure described above can also be applied to bearings.
FIG. 14 shows an example of a power transmission bearing having an electrode having a sandwich structure.

As shown in FIG. 14, the power transmission electrode disk 131 connected to the power transmission electrode is displayed in black, and the power reception electrode disk 281 connected to the load is displayed in white.
Further, the number of power receiving electrode disks 281 is one more than the number of power transmitting electrode disks 131. Thereby, both sides can be covered with the power transmission electrode disk 131 having a large number of sheets. For this reason, it can be set as a shield structure by covering the whole with the receiving electrode disk 281 with many disks. Thereby, it is possible to prevent the displacement current flowing between the power receiving electrode disk 281 and the power transmitting electrode disk 131 from leaking to the outside. The disk having a large number of disks is not limited to the power receiving electrode disk 281 but may be the power transmitting electrode disk 131.
By preparing two sets of such sandwich electrodes, power can be supplied from the power source to the load. Even in the case of the shield structure, there is a displacement current between the two pairs of sandwich electrodes, and therefore a measure such as installing them apart is necessary.

Also, the entire two sets of sandwich electrodes can be placed in a shield box. In this case, the parasitic capacitance between the shield box and the electrode becomes a problem, but it can be dealt with by adjusting the resonance capacitance of the parallel resonance circuit.
In addition, since the example of FIG. 14 is a power transmission bearing, either the power source side or the load side is disposed on the rotating shaft 500 side, and the other is disposed on the fixed body side.

FIG. 15 is a step view showing a relationship between a circuit and a shield in a bearing having two pairs of sandwich electrodes.
In the example of the bearing shown in FIG. 15, a rotating body 601 is disposed at the center of the bearing, and a donut-shaped fixed body 701 is disposed at the periphery. For this reason, the power transmission electrode disk 141 and the power reception electrode disk 291 are disposed on both sides of the rotating body 601. The power transmission electrode disk 141 and the power reception electrode disk 291 are integrated in a disk shape. Note that the fixed body 701 and the rotating body 601 can be interchanged. That is, either the power source side or the load side can be arranged on the rotating body 601 side, and the other side can be arranged on the fixed body 701 side.

FIG. 15 (a) shows an example in which the whole is surrounded by one of the electrodes constituting a pair of sandwich structure electrodes. These are stacked in two stages, and an insulating layer 293 is disposed therebetween. Thereby, although the displacement current between the power transmission electrode and the power reception electrode constituting the sandwich electrode does not leak to the outside, a displacement current flows between the electrode A and the electrode B because a voltage is applied. Furthermore, an electric shock will occur if a person touches it. Further, when the rotator 601 is made of metal, the electrode A and the electrode B are short-circuited by the rotator 601. On the other hand, when the rotator 601 is not made of metal, electromagnetic waves leak to the outside, making it difficult to obtain mechanical strength.

FIG. 15B shows an example in which the entire two sets of sandwich electrodes are covered with a shield material independent of the electrodes. At this time, it is necessary to reduce the parasitic capacitance by securing the distance between the shield S and the electrode. However, if the distance between the rotating body 601 and the fixed body 701 is small, it is possible to shield almost completely. Moreover, the problem of dust mixing and the problem of electromagnetic wave radiation can be solved. The problem of parasitic capacitance can be solved by using a parallel resonant circuit. That is, in the example of FIG. 15B, a method of completely covering with the shield S is adopted.

In the power supply system, depending on the application, it may be necessary to transmit extremely large power.
FIG. 16 is a diagram illustrating an example of a circuit of a high power type power transmission bearing.
In the example shown in FIG. 16, an inverter is installed for each set of power transmission electrodes. By operating each of the plurality of inverters in synchronism with each other, it is possible to transmit a large amount of power by increasing the number of inverters having a small capacity.

Next, a method for retrofitting an electric field coupling non-contact power transmission system to an existing rotating shaft 303 will be described with reference to FIGS. 17 to 22.
FIG. 17 is a diagram illustrating a method of fixing the rotating shaft 303 by the shaft fixing block 301.
As shown in FIG. 17, it arrange | positions so that the axis | shaft fixed block 301 to which an internal diameter closely_contact | adheres to the rotating shaft 303 may be covered. Since the shaft fixing block 301 is divided in half, the rotation shaft 303 can be sandwiched later. The shaft fixing block 301 is made of an insulator, and a required number of conducting wires 302 are passed through the shaft fixing block 301.

In the example of FIG. 17A, a through hole or a tapped screw hole is formed in the rotary shaft 303 and pressed against the shaft fixing block by using a through bolt 304 and a presser fitting 305. As a result, the two shaft fixing blocks 301 can be integrated and brought into close contact with the rotating shaft 303.
In the example of FIG. 17B, a method of fastening between the screw holes provided in the shaft fixing block 301 is employed as a method of fixing the shaft fixing block 301. This method has an advantage that the rotating shaft 303 does not need to be processed at all.
In the example of FIG. 17C, a method is adopted in which the shaft fixing block 301 is brought into close contact with a screw fastening type fixing band 306. This method also has the advantage that there is no need to process the rotating shaft 303 at all.

FIG. 18 is a view showing a method for fixing the insulating bellows 307 to the rotating shaft 303.
As shown in FIG. 18, a loose plate 307 made of a resin such as nylon is wound around a rotating shaft 303 and fixed by a fixing band 306. In this method, the screw receiving bracket 310 having the function of the conducting wire 302 in the example of FIG.
Further, a connecting metal fitting 308 having a needle is sandwiched between the ends of the loose plate 307. As a result, when the loose plate 307 is tightened by the fixing band 306, the needle of the connecting metal fitting 308 bites into a resin material such as nylon, so that no shift occurs in the joint portion.

FIG. 19 is a diagram illustrating a method of attaching the

rotor electrodes

312 and 313 to the rotating shaft 303 using the shaft fixing block 311.
As shown in FIG. 19, after the shaft fixing block 311 is attached to the rotating shaft 303, the

rotor electrodes

312 and 313 are attached. As the

rotor electrodes

312 and 313, a half-cracked disk is used, and a half-cracked pipe that fits the rotating shaft 303 is attached to the base of the disk. By combining these on the left and right, one rotating plate can be configured. However, since it is necessary to join the left and right half-cracked disks, a half-cracked disk having the same configuration is applied from the back. At this time, by rotating the dividing line by 90 degrees, the rotating plates on the front side and the back side are bonded together in a state of being back-to-back. Specifically, one rotor plate can be formed on the surface by joining the rotor electrode 312a on the left side of the surface and the rotor electrode 312b on the right side of the surface. Furthermore, one rotating plate can be formed on the back surface by bonding the rotating electrode element 313a on the upper surface side and the rotating electrode element 313b on the lower surface side. Then, the front rotating plate and the rear rotating plate are pasted back to back.
Then, the rotating plate is fastened to the shaft fixing block 311 with fixing bolts 315. At this time, some bolts (conduction bolts 316) are aligned with the conduction lines 314. Thereby, electrical conduction can be achieved. The method for attaching the

rotor electrodes

312 and 313 is not particularly limited, and may be welding or double-sided tape adhesion. However, it is necessary to keep conduction between the front surface and the back surface.

FIG. 20 is a diagram illustrating another method of attaching the half-cracked rotor electrode 324 to the rotating shaft 303.
FIG. 20A is a view showing a state in which an insulating rubber plate 321 is wound around the rotating shaft 303.
FIG. 20B is a diagram illustrating a state in which a half-cracked metal pipe 323 is covered from above and below on the rotating shaft 303 in the state illustrated in FIG. Since the half-cracked metal pipe 323 is electrically connected to the half-cracked rotor electrode 324, the half-cracked metal pipe 323 is provided with a covered conducting wire 322. The covered conductive wire 322 is embedded in the insulating rubber plate 321.
In FIG. 20C, the half-cracked rotor electrode 324 is sandwiched and attached from the left and right so as to be orthogonal to the crack of the half-cracked metal pipe 323. It should be noted that the joint portion between the half-cracked rotor electrodes 324 is attached to the end portion of the half-cracked rotor electrode 324 so that a step does not occur.
In FIG. 20D, the rotor electrode is fixed by attaching the separate collar 325 last. If the required number of the rotor electrode plates are arranged and the rotor electrode plates are connected by the conductive wires, the stator electrode is attached next. Here, a method of attaching the stator electrode will be described with reference to FIGS.

FIG. 21 is a diagram showing a half crack method as an example of a method of attaching the stator electrode 333 to the rotating shaft 303.
As shown in FIG. 21, a plurality of half-cracked stator electrodes 333 are housed in separate divided cases 335 and fitted from the left and right of the rotating shaft 303. Then, the left and right half-cracked stator electrodes 333 are electrically connected to each other so as to be electrically integrated. Note that the number of stator electrodes 333 is the same as the number of rotor electrodes 332, or the number of stator electrodes 333 is increased or decreased by one. The rotor electrode 332 is housed in the split case 335 to be fitted together with the two half-cracked stator electrodes 333 to be fitted.

FIG. 22 is a diagram illustrating an opening method as an example of a method of attaching the stator electrode 341 to the rotating shaft 303.
As shown in FIG. 22, an opening is made in one of the stator electrodes 341 having an opening so that the rotating shaft 303 can be inserted from one direction. That is, an opening is provided in a portion through which the rotation shaft 303 passes. In addition, since the junction capacitance Cc is reduced only in this opening, an attachment for closing the opening later may be prepared. However, the attachment is electrically integrated with the surrounding stator electrodes. The rotor electrode 332 is housed in the case 342 together with the stator electrode 341 having an opening.
As described above, by the method shown in FIGS. 17 to 22, the electric field coupling non-contact power supply unit can be attached to the existing rotating shaft 303 later.

FIG. 23 is a diagram illustrating an example of a power transmission bearing in which a fluid G is injected between the rotating body electrode 354 and the fixed body electrode 353.
At this time, a substance functioning as a rotary bearing may be dispersed in the fluid G and mixed. Substances that function as rotating bearings include fullerenes (C60, C70, C76, C78, C82, C84, C86, C88, C90, C92, C94, C96, C116, etc.) and ceramic balls, depending on the distance between the electrodes. Can be used properly. In FIG. 23, the fluid P and the substance functioning as the rotary bearing are circulated by the pump P. In addition, when the stirring mechanism is provided in the rotating body electrode 354, the pump P is not necessary.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention. It is.

For example, in the above-described embodiment, it is assumed that the electrode pair is not in contact, but it is sufficient if contact is made through an insulator and the electrical proximity state is maintained even if it is not completely contactless. It is possible to ensure the junction capacity. That is, even if some of the electrode pairs are physically in contact with each other, sufficient electric power can be supplied as long as they are electrically insulated.

In summary, the power supply system to which the present invention is applied only needs to have the following configuration, and can take various embodiments.
That is, the power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission line (for example, the power transmission unit 1 in FIG. 1) that transmits power from an AC power source (for example, the power source Vf in FIG. 1) having a predetermined wavelength;
It has a power receiving electrode (for example, the comb-shaped power receiving electrode 22 in FIG. 1), moves along the power transmission line, and a portion of the power transmission line that faces the power receiving electrode is a power transmitting electrode (for example, multi-groove power transmitting in FIG. 1). The electrode 12) receives power from the power transmission line through a plurality of junction capacitances (for example, the junction capacitance Cc in FIG. 1) formed by the power transmission electrode and the power reception electrode, and loads (for example, the load in FIG. 1). R) for receiving power (for example, power receiving unit 2 in FIG. 1),
With
The power receiving unit includes a spring-like member (for example, the head fixing unit 223 in FIG. 2) as a component, and the power transmission line has a curved portion (for example, the curved portion C in FIG. 2) while power is supplied to the load. ).
Thereby, in the power transmission line having a curved portion, the junction capacitance can be stably increased when power is transmitted.

In addition, the junction capacitance may be formed in a state where the power transmission electrode and the power reception electrode are arranged opposite to each other in a nested manner.
Thereby, in the power transmission line having the curved portion, the junction capacitance can be increased more stably.

In addition, a power transmission side conductive plate (for example, the power transmission unit chassis 111 in FIG. 6) disposed in the vicinity of the plurality of power transmission electrodes and on the AC power supply side in a noncontact manner with respect to the plurality of power transmission electrodes;
A power-receiving-side conductive plate (for example, power-receiving unit chassis 271 in FIG. 6) disposed in the vicinity of the plurality of power-receiving electrodes and on the load side in a non-contact manner with respect to the plurality of power-receiving electrodes;
Further comprising
The power transmission electrode in a state where the power transmission side conductive plate and the power reception side conductive plate protrude outward from the ends of the power transmission electrode and the power reception electrode (for example, the states of FIGS. 7C to 7E). In addition, the power receiving electrode may be disposed so as to be sandwiched from outside.

Further, of the power transmission side conductive plate and the power reception side conductive plate, a portion that protrudes outside the end portions of the power transmission electrode and the power reception electrode has a curved portion, and an end portion of the power transmission side conductive plate It is possible to maintain a state where the end portions of the power receiving side conductive plate are close to each other.
As a result, in a power transmission line having a curved portion, the junction capacitance is stably increased, electromagnetic radiation is reduced, safety (prevention of electric shock) is increased, and resistance to contamination such as dust is increased. be able to.

The power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A rotating shaft, and a power transmitting electrode (for example, a power transmitting electrode disk 131 in FIG. 14) composed of a plurality of layers of plates that are electrically insulated from the rotating shaft (for example, the rotating shaft 500 in FIG. 14),
The power receiving unit
A stationary body arranged around the rotation shaft, and a power receiving electrode composed of a plurality of layers of flat plates fixed to the stationary body in a state of being electrically insulated from the stationary body and the power transmission electrode (for example, the power receiving in FIG. 14) An electrode disk 281),
The power transmitting electrode and the power receiving electrode are arranged opposite to each other in a nested manner.

The power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A fixed body disposed around a rotating shaft, and a power transmission electrode composed of a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the power receiving electrode,
The power receiving unit
The rotating shaft, and a power receiving electrode comprising a plurality of layers of flat plates electrically insulated from the rotating shaft,
The power receiving electrode and the power transmitting electrode are arranged opposite to each other in a nested manner.
As a result, in power transmission to the rotating body, it is possible to stably increase the junction capacity, reduce electromagnetic radiation, increase safety (prevention of electric shock), and increase resistance to contamination of dust and the like. it can.

The power supply system to which the present invention is applied is
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
A power supply system to which electric field coupled power transmission technology is applied,
A first electrode comprising a rotating shaft and a plurality of layers of flat plates electrically insulated from the rotating shaft;
A fixed body arranged around the rotating shaft, and a second electrode comprising a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the first electrode;
Are placed opposite each other in a nested manner,
When the first electrode group is the power receiving electrode and the second electrode group is the power transmitting electrode, and the rotation axis is included in a part of the circuit, a part of the first electrode group Even when in contact with the rotating shaft, power can be supplied to the load via the junction capacitance.
Further, when the first electrode group is the power receiving electrode and the second electrode group is the power transmission electrode, and the fixed body is included in a part of the circuit, the second electrode group Even when a part of the fixed body is in contact with the fixed body, electric power can be supplied to the load through the junction capacitance.
Further, even when the first electrode is the power transmitting electrode and the second electrode is the power receiving electrode, power can be supplied to the load.

Further, the power transmitting electrode and the power receiving electrode can be separated by the presence of the fluid that flows between the power transmitting electrode and the power receiving electrode.
Thereby, in electric power transmission with respect to the track | line which has a rotary body and a curved part, junction capacity can be stabilized.

The power supply system to which the present invention is applied is completely contactless and satisfies these characteristics.
In other words, by possessing technologies that can be handled by a plurality of methods, it is possible to use them depending on the application, and it is also possible to use a plurality of technologies in combination. This leads to greatly expanding the possibilities of electric field coupling contactless power supply technology.
Since the sandwich electrode increases the area of the opposing surface by a laminated structure, it can be made completely non-contact. In particular, it is highly necessary to use a sandwich electrode in a high-speed rotating part. However, even if it is not completely non-contact, it is possible to ensure a sufficient junction capacity when the contact is made through the insulator and the electrical proximity state is maintained. That is, even if some of the electrode pairs are physically in contact with each other, sufficient electric power can be supplied as long as they are electrically insulated.

1: power transmission unit, 2: power reception unit, 11, 21: parallel resonance circuit, 12: multi-groove power transmission electrode, 22: comb-shaped power reception electrode, 111: power transmission unit chassis, power transmission electrode plate: 123, 121: metal cover, 131, 141: Power transmission electrode disk, 221, 241: Power reception electrode part, 222, 247, 257: Elastic body, 223: Head fixing part, 224, 232, 242, 252: Electrode fixing rod, 225: Head part, 231: Power transmission electrode 233, 244, 254: Wheel, 234: Spring material, 235: Hinge pin, 236: Connection line, 243: Center holding plate, 245, 255: Wheel pin, 246: Wheel fixing metal plate, 248, 251, 258: Absorption Exhaust port, 249, 259: conducting wire, 250, 260: contact, 253: central holding plate, 271: power receiving unit chassis, 272: moving body, power receiving Electrode plate: 273, 281, 291: Power receiving electrode disk, 292: Multiple disk type sandwich structure electrode, 293: Insulating layer, 301: Shaft fixing block, 302: Conducting wire, 303,500: Rotating shaft, 304: Through bolt, 305: Press fitting, 306: Fixing band, 307: Sputter plate, 308: Connecting metal fitting, 309: Screw, 310: Screw receiving fitting, 311 and 331: Shaft fixing block, 312, 312a, 312b, 313, 313a, 313b, 332: Rotor electrode, 315: Fixing bolt, 316: Conductive bolt, 321: Rubber plate, 322: Coated conductor, 323: Half-cracked metal pipe, 324: Half-cracked rotor electrode, 325: Separate color, 333: Half-cracked stator electrode, 334: Conductive cable, 335: Split case, 341: Open 342: Case, 351: Rotating body electrode fixed insulator, 352: Rotating body electrode fixed fluid distribution insulator, 353: Fixed body electrode, 354: Rotating body electrode, 400: CAP electrode, 601: Rotating body (fixed body), 701: Fixed body (rotating body)

Claims

A power supply system using electric field coupled power transmission technology,
A power transmission line for transmitting power from an AC power source of a predetermined wavelength;
A plurality of junction capacitors formed by the power transmission electrode and the power receiving electrode, having a power receiving electrode, moving along the power transmission line, and using a portion of the power transmission line facing the power receiving electrode as a power transmitting electrode A power receiving unit that receives power from the power transmission line via the power supply and supplies the power to a load;
With
The power receiving unit includes a spring-like member as a component, and is movable along a curved portion of the power transmission line in a state where power is supplied to the load.
Power supply system.
The junction capacitance is formed in a state where the power transmission electrode and the power reception electrode are arranged opposite to each other in a nested manner,
The power supply system according to claim 1.
Near the plurality of power transmission electrodes and on the AC power supply side, a power transmission side conductive plate disposed in a non-contact manner facing the plurality of power transmission electrodes;
A power-receiving-side conductive plate that is disposed in the vicinity of the plurality of power-receiving electrodes and on the load side in a noncontact manner with respect to the plurality of power-receiving electrodes;
Further comprising
The power transmission side conductive plate and the power reception side conductive plate are arranged so as to sandwich the power transmission electrode and the power reception electrode from the outside in a state of protruding outward from the ends of the power transmission electrode and the power reception electrode. ,
The power supply system according to claim 1 or 2.
Of the power transmission side conductive plate and the power reception side conductive plate, a portion that protrudes outside the ends of the power transmission electrode and the power reception electrode has a curved portion, and the end of the power transmission side conductive plate and the power reception The state where the end portions of the side conductive plates are close to each other is maintained,
The power supply system according to claim 3.
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A rotating shaft, and a power transmission electrode composed of a plurality of layers of flat plates electrically insulated from the rotating shaft,
The power receiving unit
A stationary body arranged around the rotating shaft, and a power receiving electrode composed of a plurality of layers of flat plates fixed to the stationary body in a state of being electrically insulated from the stationary body and the power transmission electrode,
The power transmission electrode and the power reception electrode are arranged opposite to each other in a nested manner,
Power supply system.
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power transmission unit
A fixed body disposed around a rotating shaft, and a power transmission electrode composed of a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the power receiving electrode,
The power receiving unit
The rotating shaft, and a power receiving electrode comprising a plurality of layers of flat plates electrically insulated from the rotating shaft,
The power receiving electrode and the power transmitting electrode are arranged opposite to each other in a nested manner,
Power supply system.
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
A power supply system to which electric field coupled power transmission technology is applied,
A first electrode comprising a rotating shaft and a plurality of layers of flat plates electrically insulated from the rotating shaft;
A fixed body arranged around the rotating shaft, and a second electrode comprising a plurality of layers of flat plates fixed to the fixed body in a state of being electrically insulated from the fixed body and the first electrode;
Are placed opposite each other in a nested manner,
When the first electrode group is the power receiving electrode and the second electrode group is the power transmitting electrode, and the rotation axis is included in a part of the circuit, a part of the first electrode group Even in a state in which the rotating shaft is in contact with the load, power is supplied to the load through the junction capacitance,
When the first electrode group is the power receiving electrode and the second electrode group is the power transmitting electrode, and the fixed body is included in a part of the circuit, a part of the second electrode group Even in a state where it is in contact with the fixed body, power is supplied to the load through the junction capacitance,
Even if the first electrode is the power transmission electrode and the second electrode is the power reception electrode, power is supplied to the load.
Power supply system.
Due to the presence of fluid flowing between the power transmission electrode and the power reception electrode, the power transmission electrode and the power reception electrode are separated from each other,
The power supply system according to any one of claims 1 to 7.