JP7185227B2 - Contactless power feeder - Google Patents

Description

The present invention relates to a safety mechanism mounted on a connector that constitutes a power supply system that electrically transmits power in a non-contact manner without using metal contacts, and a structure that enhances the efficiency of power transmission. In particular, it relates to non-contact power supply technology on the surface of the sea, in the sea, or in a wet place.

In the transmission of electric power, etc., connection parts with metal contacts have problems such as rust and electric leakage.

Technologies related to wireless power transfer, which have been attracting attention recently, prioritize the improvement of user convenience. It is characterized by being able to supply power without contact. As a result, increasing the distance between the power supply side device and the power receiving side device tends to be prioritized over improving the power efficiency of the contactless power supply. In contactless power supply (charging) to an electric vehicle, which is a typical example, control using wireless communication is often used to safely start and stop the power supply (charging).

In some cases, a device on the power feeding side and a device on the power receiving side are positioned close to each other to provide the intended non-contact power feeding function.

Japanese Unexamined Patent Application Publication No. 2004-166459 JP 2017-103858 A JP 2017-046578 A Japanese Unexamined Patent Application Publication No. 2009-228396 JP 2009-240099 A JP 2017-175803 A

The invention of Patent Document 1 relates to a non-contact power supply system that can be used for underwater robots and the like, and is controlled so that non-contact power supply can be performed only when a power supply side device and a power receiving side device are in a predetermined positional relationship with each other. It is characterized by being It is presumed that this invention was made on the assumption that the device on the power supply side and the device on the power receiving side of contactless power supply would be automatically connected. , the connection part becomes unstable, and it is easy to come up with the problem that the non-contact power supply cannot be continued as desired.

The invention of Patent Document 2 relates to a contactless power supply system that is assumed to be used in a place where it is expected to get wet with water. and are in a predetermined positional relationship with each other, it is characterized in that control is performed so that contactless power supply can be performed. In the case of the invention of Patent Document 2 as well, attention is focused only on the fact that the power supply side device and the power receiving side device are in a predetermined positional relationship with each other, and these devices are used in locations subject to vibrations and swings. is not even taken into consideration. Therefore, when these devices are used in a place where there is vibration or swaying, it is easy to imagine that the connection part becomes unstable, causing a problem that the non-contact power supply cannot be continued as desired.

The invention of Patent Document 3 has a mechanism or structure in which the power supply side device and the power receiving side device are fixed in a predetermined positional relationship, and the transmission and reception of electric power exhibits a predetermined function or performance in the relative positional relationship. The present invention relates to a contactless power feeding system characterized by: According to the invention of Patent Document 3, the power supply side device and the power receiving side device are fixed in a predetermined positional relationship due to its characteristics. There is no clear indication of the detachment of the device or the function to detect the detachment and stop the device safely.

As described above, in the prior art, in order to realize wireless power supply under the sea or in a wet environment, the device operates by detecting the relative positional relationship between the device on the power transmitting side and the device on the receiving side. One that controls the situation, and one that eliminates the need to detect the relative positional relationship by fixing the same relative positional relationship.

In this way, by detecting that the relative positional relationship between the device on the side of transmitting power and the device on the side of receiving power has been fixed, or that the fixed state has been released or has been released, contactless transmission of power can be performed. There is no technical literature showing a controlling method or device.

The invention of Patent Document 4 identifies the operating state of a load connected to a power receiving device that receives contactless power supply, sends a relatively small amount of power when the load device connected to the power receiving device is on standby, and loads the load connected to the power receiving device. It is devised to reduce wasteful power consumption by sending a relatively large amount of power when the device is operating as desired. Therefore, as a feedback signal, the device on the power receiving side merely notifies the device on the power transmission side of the state of the load device connected to the device on the power receiving side, and when the load dynamically fluctuates, a stable voltage supply to the load device is realized. not a thing

The invention of Patent Document 5 transmits the difference between the output voltage to the load and the reference voltage (target voltage) to the power supply device at the duty ratio of the light pulse by the function included in the power receiving device that receives contactless power supply. By controlling the output power of the device on the power supply side so as to keep the duty ratio constant, the voltage supplied from the device on the power receiving side to the load is kept constant. When this method is used in places with different conditions, such as on the surface of the sea, in sea water, or in places where there is a risk of getting wet (in the air), the transmission conditions of the optical pulse will not be constant, and the duty ratio when the light is sent out will vary. , the duty ratio may be different from that detected, and as a result, it is predicted that the voltage supplied from the power receiving device to the load will not be stable.

The invention of Patent Document 6 discloses a method of transmitting a feedback signal from a power receiving device to a power feeding device using so-called packet communication. It can be said that packet communication is superior in terms of communication stability, but it is difficult to imagine that responsive feedback, such as information framing processing and extraction of information from received packets, can be achieved. .

As described above, the prior art discloses a feedback function from a power receiving device to a power feeding device in contactless power supply. Those that function normally and those that use complex communication functions such as packet communication.

In this way, when devices related to contactless power supply are used on the surface of the sea, in seawater, in places where there is a risk of getting wet (in the air), and when moving between these places, etc. There is no technical document showing a feedback function from the power receiving side device to the power feeding side device that can be used stably.

The problem to be solved by the present invention is to provide a mechanism or structure for fixing a power feeding side device and a power receiving side device in a predetermined relative positional relationship, and in the relative positional relationship, power transmission/reception is performed in a predetermined manner. In a contactless power supply system characterized by exhibiting function or performance, fixing the relative positional relationship between the device on the power transmitting side and the device on the receiving side, or releasing or releasing the fixed state The object of the present invention is to provide a method for controlling efficient non-contact transmission of electric power by detecting the occurrence of a failure, a configuration of the apparatus, and a structure for enhancing efficiency of power supply through the core.
A further problem to be solved by the present invention is that a device related to non-contact power supply is used on the surface of the sea, in the sea, in a place where there is a risk of getting wet, or while moving between these places. To provide a device for stably controlling a voltage supplied from a power receiving side device to a load by stably performing feedback from a power receiving side device to a power feeding side device even if usage conditions fluctuate.

The configuration of the present invention that solves this problem is
1) A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function. A device on the power transmission side and a device on the power reception side are connected to each other, and the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device is fixed. In a set of devices characterized in that they have a mechanism or structure that allows the transmission and reception of electric power to exhibit a predetermined function or performance in the fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. 2) A power transmission side device including a contactless power supply function and a contactless power supply, characterized by preventing the power transmission unit from transmitting power in a non-contact manner unless detected. There is a power receiving side device that includes a contactless power receiving function corresponding to the function, and these are paired to form a group of devices that transmit and receive power. It has a mechanism or structure that fixes the relative positional relationship between the power transmission part of the contactless power supply function and the power reception part of the contactless power reception function included in each device, and the fixed relative position In a set of devices characterized in that the transmission and reception of power in relation to each other exhibit a predetermined function or performance,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a second function for detecting that the power transmitting unit and the power receiving unit are out of the fixed relative positional relationship. 3) a power transmission side device including a wireless power supply function, which is characterized in that the power transmission unit stops contactless power transmission when disconnection is detected; There is a power receiving side device that includes a wireless power receiving function corresponding to the wireless power supply function, and a group of devices that are paired to transmit and receive power, and the power transmission side device and the power receiving side device are connected to each other. and has a mechanism or structure for fixing the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device. In a set of devices characterized by exhibiting a predetermined function or performance in the transmission and reception of electric power in a relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. There is a second function, and when the second function detects that the fixing in the predetermined relative positional relationship is deviated, the power transmission unit stops contactless power transmission,
Moreover, as the first circuit having the first function and the second function, a proximity sensor is arranged in the power transmitting side device including the contactless power supply function, and the proximity sensor is arranged in the power receiving side device including the contactless power receiving function. An object that activates a sensor is arranged, and a first function occurs when the object approaches the proximity sensor, and a second function occurs when the object moves away from the proximity sensor. Device group 4) There is a power transmission side device that includes a contactless power supply function and a power reception side device that includes a contactless power reception function corresponding to the contactless power supply function, and a pair of these to transmit and receive power A group of devices, in which a power transmission side device and a power reception side device are connected to each other, and the relative relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device A set of devices characterized in that they have a mechanism or structure that fixes their positional relationship, and that transmission and reception of electric power exhibit a predetermined function or performance in the fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. 2, and when the second function detects that it is out of the fixed relative positional relationship, the power transmission unit stops contactless power transmission,
In addition, as a second circuit having the first function and the second function, a light transmitter that emits light to the outside of the power transmission side device including the contactless power supply function, and light from the outside of the device. At the same time, one or more reflecting mirrors or optical fibers are provided on the power receiving side device including the non-contact power receiving function to form an optical path,
Light emitted from the optical transmitter only when the power transmitting side device including the contactless power supply function and the power receiving side device including the contactless power receiving function are fixed in a correct relative positional relationship in the second circuit. is received by the light receiver through the optical path provided with the reflecting mirror or the optical fiber 5) The non-contact power receiving function of the second circuit 6) Non-contact power feeding , wherein all or part of the optical path formed by one or more reflecting mirrors provided in the included power receiving side device is formed using a light guide path. A power transmitting side device including a function and a power receiving side device including a wireless power receiving function corresponding to the wireless power feeding function, and a group of devices that are paired to transmit and receive power, and the power transmitting side A mechanism or structure that connects a device and a power receiving side device to each other and fixes the relative positional relationship between the power transmission part of the contactless power feeding function and the power receiving part of the contactless power receiving function included in each device In a set of devices characterized in that the transmission and reception of electric power exhibit a predetermined function or performance in the fixed relative positional relationship,
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. There is a second function, and when the second function detects that the fixing in the predetermined relative positional relationship is deviated, the power transmission unit stops contactless power transmission,
Moreover, as the first circuit having the first function and the second function, a proximity sensor is arranged in the power transmitting side device including the contactless power supply function, and the proximity sensor is arranged in the power receiving side device including the contactless power receiving function. An object that activates a sensor is arranged, and a first function occurs when the object approaches the proximity sensor, and a second function occurs when the object moves away from the proximity sensor. A device group that becomes
In addition to the combination of the proximity sensor of the first circuit and the object that activates the proximity sensor, the power transmitting device is provided with an optical transmitter, and the power receiving device is provided with light from the optical transmitter. A light receiver for receiving light and its optical path are provided, the proximity sensor and the object are combined, and the contactless power supply is controlled according to the pattern or order of the combinations detected therein . Device Group 7) An induction coil for power transmission and reception and an induction coil for power transmission and reception are provided in the power transmission unit of the power transmission side device including the contactless power supply function and the power reception portion of the power reception side device including the contactless power reception function. A C-shaped or U-shaped core wound with a coil and having both ends of the core open is enclosed in a magnetically permeable waterproof casing, and the waterproof casing is provided at the close relative position where it is wet with water, An outer core part that is wetted by water is provided by extending from the end of the core enclosed in one or both of the waterproof casings to the outside of the casing, and the waterproof casings are brought close to each other and fixed in the relative positions. 8) A set of devices according to 6) above, in which the outer core portion connects the ends of the C-shaped or U-shaped cores in the respective waterproof casings to form a closed core to increase power transmission efficiency. The device on the power receiving side has a function of transmitting an optical pulse with a frequency corresponding to the voltage of the power to be supplied to the connected load, and the device on the power transmitting side has a function of receiving the transmitted optical pulse. a receiving voltage stabilization control circuit configured with a negative feedback control unit that increases or decreases the amount of high-frequency power transmitted according to the number of optical pulses per unit time so that the amount of power is reduced when the number of pulses is large, 9) The group of devices to be combined according to any one of 1) to 7) above, characterized in that the voltage of the power sent from the power receiving side device to the load is kept constant (target value) by the stabilizing control circuit. The device on the side has a function of transmitting an optical pulse with a frequency corresponding to the voltage of the power supplied to the connected load, and the device on the power transmission side has a function of receiving the transmitted optical pulse, and the received optical pulse. 1) to an abnormality countermeasure circuit of the power receiving side device having a function of detecting an abnormality of the power receiving side device based on the number of pulses per unit time and cutting off the high-frequency power transmitted by the power transmitting device if there is an abnormality. 8) in any set of devices according to any one of the claims;

The basic configuration of the present invention is
It has a structure that allows paired parts such as the sending part of the device on the power supply side and the receiving part of the device on the power receiving side to be fitted in place with a simple mechanism,
When these parts are fitted together, the relative positional relationship between the members related to the spatial transmission of the power transmission function part and the power reception function part of the contactless power supply, which are included in each device, is in a predetermined state. is a combination,
Furthermore, it has a function of detecting not only the mated state but also the state of being fixed in the mated state, and a function of detecting release or release of the fixed state to control contactless transmission of electric power. is a combination of
Furthermore, at a position where the core of the induction coil in the device on the power supply side and the core of the induction coil in the device on the power receiving side are close to each other, an outer core is arranged to make the gap between the cores in the devices close to each other as short as possible. It has a structure that enhances power supply efficiency.
In addition to the above configuration, the basic configuration that solves further problems is
The power receiving device has a voltage frequency conversion (V/f conversion) function and a part that emits pulses according to the frequency,
The device on the power supply side has a function to convert the received optical pulse into an electrical pulse signal, and uses the number of pulses per unit time of the electrical pulse signal to increase or decrease the power (voltage) of the high-frequency power to be sent. It has a negative feedback control unit that
By integrating these functions, as a result, the voltage of the power that the power receiving device sends to the load is maintained at an appropriate value (target value).

According to the present invention, it is possible to provide a method and a device therefor for simple, reliable and stable power transmission using a contactless power supply technique on the surface of the sea, in the sea, or in a place where there is a risk of getting wet.
Particularly in contactless power supply, high-frequency power is often transmitted and received through space. If power transmission is not started before the power transmission unit and power reception unit are mated, or power transmission is not immediately stopped when the power transmission unit and power reception unit are unintentionally separated, unnecessary electromagnetic radiation will be scattered in the open space. Become. There is also an effect that can solve such a problem.
In addition, by arranging an outer core that shortens the gap between the cores of the induction coils facing each other in the power transmission unit and the power reception unit, the efficiency of power supply through the cores is increased.
Especially in contactless power supply, even if the load connected to the power receiving side device dynamically fluctuates, there is an effect that the voltage of the power supplied to the load is kept constant.
Also, when the load is minimal, in other words, when there is no load, it can be easily assumed that the output voltage from the power receiving side device will be extremely large if no countermeasures are taken. Even in this case, according to the present invention, the voltage is maintained at an appropriate value, and there is an effect such as not generating an abnormally high voltage.

FIG. 1 is an explanatory diagram showing the basic configuration of the present invention. FIG. 2 is an explanatory diagram relating to Example 1 of the present invention. FIG. 3 is an explanatory diagram according to Embodiment 2 of the present invention. FIG. 4 is a first explanatory diagram according to Embodiment 3 of the present invention. FIG. 5 is a second explanatory diagram according to Example 3 of the present invention. FIG. 6 is a third explanatory diagram according to Example 3 of the present invention. FIG. 7 is an explanatory diagram showing a core structure in which the cores of the induction coils in Examples 1 to 3 are closed relative to each other. FIG. 8 is a circuit diagram showing a circuit example of the stability control circuit provided in Examples 1-3. FIG. 9 is a circuit diagram showing a circuit example of the anomaly handling circuit provided in the first to third embodiments.

As the relative position detection function of the present invention, there is a method of detecting with a magnet and a proximity switch sensitive to the magnet as in the first circuit shown in FIG. There is a second circuit method that uses optical fibers, mirrors, etc., and an appropriate method is adopted according to the purpose of use and the environment.

Examples and the like will be described with reference to the drawings.

First, the basic configuration of the present invention will be described with reference to FIG.
In FIG. 1 , the recessed area (mainly on the left side) indicates the power supply device 1 , and the similarly convex area (mainly on the right side) indicates the power receiving side device 2 .
The power supply side device 1 includes a rectifier circuit 10, a power control circuit 11, an induction coil 12, a transmission start or transmission stop control section 13, a fixation or release detection section 14, and the like. An electrical symbol (a symbol of an AC voltage source) written at the left end expresses the external power supply 15 . Further, X is a power transmission section of the power supply side device 1, and a core 420 and an induction coil 12 wound around the core 420 are enclosed in a waterproof casing 42. As shown in FIG.
Similarly, the power receiving device 2 includes an induction coil 20, a rectifying circuit 21, a fixed or released detection auxiliary unit 22, and the like. An electric symbol (Rz) written on the right end expresses the external load 23 . Moreover, Y is a power receiving portion of the power receiving side device 2 , which encloses a core 410 and an induction coil 20 wound around the core 410 in a waterproof casing 41 , and has an outer core 411 continuous with the core 410 outside the casing 41 . is doing.
Note that these configurations are block diagrams that are often used in the description of electrical systems, and there are various specific configurations. Therefore, it is not limited to this description.
Also, since the drawings are shown in an easy-to-understand manner, the fitting portions of the recesses and projections are not brought into close contact with each other, but in actual use, appropriate fitting processing and fastening processing are performed.

In this figure, power transmission will be described as follows.
The power-supply-side device 1 rectifies the received (to be sent) power and converts it into direct current. Then, the power control circuit 11 converts it into desired high-frequency power. This high frequency power is supplied to the induction coil 12 . Whether or not the power is actually converted into high-frequency power and supplied to the induction coil 12 is controlled by the control unit 13 for starting or stopping transmission.
In the transmission start/stop control unit 13, the positional relationship between the fixation or release detection unit 14 included in the power supply device 1 and the fixation or release detection auxiliary unit 22 included in the opposite power receiving device 2 is used. When the power supply side device 1 and the power receiving side device 2 are properly fitted and fastened, a signal instructing the start of power transmission is issued.
When the power supply device 1 issues a signal instructing the start of power transmission, the positional relationship between the induction coil 12 included in the power supply device 1 and the induction coil 20 included in the power receiving device 2 is appropriate. It is a thing. Therefore, the high-frequency power supplied to the induction coil 12 included in the power-supplying-side device 1 mutually induces the induction coil 20 included in the power-receiving-side device 2 .
In the power receiving device 2, an induced electromotive force is generated in the induction coil 20 due to mutual induction. Then, a predetermined current flows under the influence of the load 23 (Rz). Although the rectifier circuit 21 of the power receiving device 2 may be unnecessary depending on the type and configuration of the load 23, here, the diagram shows a case in which power is supplied to the load after being converted to direct current.
In addition, it receives a signal of information issued from the positional relationship between the fixed or released detection unit 14 included in the power supply side device 1 and the fixed or released detection auxiliary unit 22 included in the opposing power receiving side device 2 and starts transmission. Alternatively, when the transmission stop control unit 13 determines that the fastening state or the fixed state of the power supply side device 1 and the power receiving side device 2 is released or released, the transmission start or transmission stop control unit 13 instructs the transmission stop. A signal is issued to At this time, power transmission is immediately stopped.

FIG. 7 shows a core connection structure common to Examples 1-3. Fig. 10 is a drawing showing the connection state of the cores before and after the relative positions of the power sending portion X in the waterproof casing 42 of the power supply device 1 and the power receiving portion Y in the waterproof casing 41 of the power receiving device 2; A C-shaped core 420 and an induction coil 12 wound thereon are enclosed in the power transmission section X, and a C-shaped core 410 and an induction coil wound therearound are also contained in the power reception section Y. A coil 20 is enclosed. Further, the core 410 inside the waterproof casing 41 has an outer core 411 protruding outside the casing. When the power transmitting portion X and the power receiving portion Y are fitted in relative positions, the outer core 411 enters the gap in water between the cores 410 and 420 to form a looped core path, thereby increasing power transmission efficiency. there is

Various variations of the present invention are described below as examples.

(See Example 1/Fig. 2)
FIG. 2 shows one embodiment of the feature of the present invention, which detects the mating state and fastening state of the power supply side device 1 and the power receiving side device 2 and controls the function of the power control circuit 11. In FIG. showing.
The left area in FIG. 2 mainly shows the power supply side device 1 , and the right side area shows the power reception side device 2 . In addition, the lower side is mainly a schematic view from the side, and the upper side is a partial schematic view from the top.
Note that these configurations are shown in electrical block diagrams and mechanical schematic diagrams, and actual circuit configurations and mechanical configurations vary. This is just one embodiment.
The state shown in this figure is the state before mating.

The fastener 3 on the upper side of the side view may be configured by a retractable hinge or the like, but is illustrated by a hook hinge. As the proximity sensor used in the fixed or released detection unit 14, a proximity switch 16 called a magnetic reed switch or the like is used. 25 is implemented.
In order to bring the power supply side device 1 and the power receiving side device 2 into a fitted state, first, the positions of the hooking hinges of the fasteners 3 are aligned so that the devices are brought into close contact with each other. In this state, the proximity switch 16 and the opposing magnet 25 are in a correct positional relationship, and the proximity switch 16 is activated.
Next, by inserting and fixing the fastener 3 attached to the power receiving side device 2 in the lower part of the side view to the correct position of the power feeding side device 1, the power feeding side device 1 and the power receiving side device 2 are fastened at the same time. , the proximity switch 17 and the opposing magnet 26 are in the correct positional relationship, and the proximity switch 17 is activated.
Only when the proximity switch 16 is operated and the proximity switch 17 is operated following the operation of the proximity switch 16, the transmission start or transmission stop control unit 13 puts the power control circuit 11 into a power supply state in which the function is exhibited.
On the other hand, when the operation of either the proximity switch 16 or the proximity switch 17 is stopped, the transmission start or transmission stop control unit 13 determines that the fastening state or the mating state is released or is released, and the electric power is supplied. The function of the control circuit 11 is stopped. That is, the proximity switches 16 and 17 and the magnets 25 and 26 have the first function and the second function.

(See Example 2/Fig. 3)
Embodiment 2 shown in FIG. 3 uses the proximity switch 16 and the magnet 25 and the proximity switch 17 and the magnet 26 of Embodiment 1 as the fixation or release detection unit 14 and the fixation or release detection auxiliary unit 22 . Instead of the function of the first circuit, the power supply side device 1 is provided with a photodetector 18 and a light emitter 19, the power receiving side device 2 receives light from the light emitter 19, and the end of the light is directed toward the photodetector 18. An optical fiber 27 (an optical path using a mirror is also possible) is used to project the received light, and the second function is the proximity switch 17 and the magnet 26 attached to the fastener 3 as in the first embodiment shown in FIG. This is the example used.
The left area in FIG. 3 mainly shows the power supply side device 1 , and the right side area shows the power receiving side device 2 . In addition, the lower side is mainly a schematic view from the side, and the upper side is a partial schematic view from the top.
Note that these configurations are shown in electrical block diagrams and mechanical schematic diagrams, and actual circuit configurations and mechanical configurations vary. This is just one embodiment.

In the second embodiment, in order to bring the power supply side device 1 and the power receiving side device 2 into a fitted state, first, the positions of the hooking hinges are aligned and the devices are brought into close contact with each other. Light emitted from the light emitter 19 in this state passes through the optical fiber 27 and reaches the photodetector 18 . At this time, it is possible to detect that the mated state is present only by the presence or absence of light, or to prevent malfunction due to disturbance light, emit light of a specific blinking pattern from the light emitter 19 and make the same blinking pattern. It is also possible to detect that the mated state is present only when the light detection of the pattern is detected.
Next, the power supply device 1 and the power reception device 2 are fastened by inserting and fixing the fastener 3 attached to the power reception device 2 in the lower part of the side view into the correct relative position of the power supply device 1. At the same time, the proximity switch 17 and the opposing magnet 26 are in the correct positional relationship, and the proximity switch 17 is activated.
The control unit 13 for starting or stopping transmission activates the function of the power control circuit 11 only when a light reception signal from the photodetector 18 that has received the light from the light emitter 19 and the engagement signal from the proximity switch 17 are input. to bring out the
On the other hand, when either the detection of the fitted state by the photodetector 18 is lost or the operation of the proximity switch 17 is stopped, the transmission start or transmission stop control unit 13 releases the fastened state or the mated state. Alternatively, it determines that it is released and stops the function of the power control circuit 11 .

(See Example 3/Figs. 4-6)
FIGS. 4, 5, and 6 show, as a third embodiment, a case where contactless power supply is controlled by a second circuit having first and second functions by combining a plurality of proximity switches 16 and magnets 26. .
These figures are shown specifically for the fitted state detection portion described in the first or second embodiment, and the other components are omitted because they are not the essence of the description of this embodiment. .
The plurality of proximity switches 16 of the power supply device 1 shown on the left in FIGS. 4 to 6 are all common. Similarly, the magnets 25 and 26 included in the power receiving device 2 shown on the right side of FIGS. 4 to 6 have three patterns depending on the presence/absence and position of the magnets a and b.
At this time, the power supply side device 1 can identify which power receiving side device 2 is fitted by detecting the operation status of the proximity switch 1a (16) and the proximity switch 1b (16).
This makes it possible to incorporate functions such as controlling the magnitude of the maximum power that can be supplied to the device 1 on the power supply side.

(Stability control circuit and error response circuit)
Circuit examples of the stability control circuit A and the abnormality handling circuit B in the first to third embodiments will be described with reference to FIGS.

First, the basic configuration of the present invention will be described with reference to FIGS.
8 and 9, the area on the left side of the vertically drawn dashed line indicates the power supply side device 1, and the area on the right side indicates the power receiving side device 2. As shown in FIG.
The power supply side device 1 includes a rectifier circuit 10, a PFC circuit 101, a power control circuit 11 (high frequency power conversion section), an induction coil 12, a negative feedback control section 102, a pulse detector 103, a photodetector 18 (such as a photodiode), and the like. is configured by including The electrical symbol (the symbol for the AC voltage source) on the left represents an external power source.
Similarly, the power receiving side device 2 includes an induction coil 20, a rectifier circuit 21, a voltage frequency converter 201 (V/f converter), a light emitter 202 (light emitting diode, etc.) and the like. An electric symbol (Rz) written on the right end expresses an external load.
Note that these configurations are block diagrams that are often used in the description of electrical systems, and there are various specific configurations. Therefore, it is not limited to this description.

In order to make the drawing easy to understand, the waterproof casing and the physical layout of FIG. 7 are not shown. The positional relationship between the induction coil 20, the core 410, and the outer core 411 included is maintained appropriately, and at the same time, the light emitter 202 included in the power receiving side device 2 and the light receiver 18 included in the power feeding side device 1 are maintained. It is also assumed that the positional relationship between the

In this figure, power transmission will be described as follows.
The power-supply-side device 1 rectifies the received (to be sent) power and converts it into direct current. After that, the PFC circuit 101 boosts the voltage to a voltage necessary for the high-frequency power converter 201 . Then, the high-frequency power converter 201 converts it into desired high-frequency power. This high frequency power is supplied to the induction coil 12 . Note that the degree of boosting by the PFC circuit 101 is determined by the control amount from the negative feedback control section 102 .
In the power receiving device 2, an induced electromotive force is generated in the induction coil 20 due to mutual induction. Then, a predetermined voltage is generated through which a predetermined current influenced by the load (Rz) flows. The rectifier circuit 21 of the power receiving device 2 may be unnecessary depending on the type and configuration of the load, but here, the diagram shows a case where the power is supplied to the load after being converted to direct current.
Furthermore, the voltage frequency converter 201 included in the power receiving device 2 generates a signal with a frequency corresponding to the voltage of the power that the power receiving device 2 is sending to the load. Then, the light-emitting device included in the power-receiving-side device 2 is caused to emit pulse light by a pulse signal that matches the frequency.
The light receiver 18 and the pulse detector 103 included in the power supply device 1 convert the received pulsed light into an electrical pulse signal, and the power reception device 2 detects the load (Rz ) to estimate the voltage of the power being delivered to Then, an appropriate amount of control for operating the boosting function of the PFC circuit 101 is negatively fed back so that the estimated voltage of the power that the power receiving side device 2 is sending out to the load (Rz) is brought to an appropriate value (target value). The control unit 102 calculates and indicates the control amount.
A series of these functions keeps the voltage of the power sent to the load (Rz) from the power receiving device 2 constant.

Examples are described below. In describing the embodiments, locally specific numerical values and algebraic expressions are used, but the contents of the invention are not limited by these numerical values and algebraic expressions.

8 and 9 show the stability control circuit A and the abnormality handling circuit B of the second circuit of the embodiment of the present invention.
The basic contents of operation are the same as the basic configuration of the present invention described above. Here, in constructing an electric circuit or the like, some specific values (numerical values) are taken into account to add an explanation.
First, let the rated value of the voltage (Vout) of the power supplied to the load Rz by the power receiving device 2 be a direct current E [V]. Then, in the voltage frequency conversion unit 201 (V/f conversion), as the output frequency f [Hz],
f=fo+a(Vout-E) (when Vmin≤Vout≤Vmax)
Here, let fmin be f=fo+a(Vmin-E) when Vout=Vmin.
When Vout=Vmax, let f=fo+a(Vmax-E) be fmax.
to output note that,
f=0 when Vout<Vmin or Vout>Vmax
and Also, fo is the frequency value when the output voltage is the rated value E [V].
A light emitter 202 included in the power receiving device 2 emits pulsed light with a frequency f. When f=0, light emission is stopped.

The photodetector 18 and the pulse detector 103 included in the power supply side device 1 that has received the pulsed light convert it into an electrical pulse signal. The counter 104 counts the electrical pulse signals.
The negative feedback control unit 102 reads the count value from the counter 104 at regular intervals and resets the count value to 0 at the same time. By dividing the read count value by the read cycle, the frequency f' of the pulsed light smoothed in a constant cycle can be obtained. If this frequency f' is smaller than fo, the amount of control to be transmitted to the PFC circuit 101 is increased stepwise from the current value. gradually decrease.
By controlling the boosting function of the PFC circuit 101 with this control amount, as a result, the voltage of the power that the power receiving device 2 is sending out to the load is kept constant.
In addition, if the optical pulse (fmin≦f≦fmax) in the proper frequency range is not detected within the specified time even though the power supply device 1 has started normally, the power reception device 2 is not functioning normally. Alternatively, it determines that there is a problem with the load (Rz) connected to the power receiving side device 2 and stops the operation of the power feeding side device 1 .

The present invention provides a method for transmitting electric power simply, reliably and safely, on the surface of the sea, in the sea, in a wet environment, and in situations where it is not desired to use metal contacts, such as for the purpose of earth leakage prevention and explosion protection. Contribute to the industry by providing and manufacturing methods for the equipment.

REFERENCE SIGNS LIST 1 power supply device 10 rectifier circuit 11 power control circuit 12 induction coil 13 transmission start or transmission stop control unit 14 fixation or release detection unit 15 external power supply 16, 17 proximity switch 18 photodetector (light receiver)
19 light emitter 101 PFC circuit 102 negative feedback control unit 103 pulse detector 104 counter 2 power receiving side device 20 induction coil 21 rectifying circuit 22 fixation or release detection auxiliary unit 23 load (Rz)
24 proximity sensor 25, 26 magnet 27 optical fiber 201 voltage frequency converter (high frequency power converter: V/f conversion)
202 Light emitter 3 Fastener 41, 42 Waterproof casing 410, 420 Core 411 Outer core A: Stabilization control circuit B: Abnormality response circuit X: Power transmission unit Y: Power reception unit

Claims (9)

A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function, wherein , a mechanism that connects the power transmission side device and the power reception side device to each other and fixes the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device Alternatively, in a set of devices that have a structure and are characterized in that transmission and reception of electric power exhibit a predetermined function or performance in a fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. A pair of devices characterized in that if not detected, the power delivery unit is prevented from transmitting power in a contactless manner. A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function, wherein , a mechanism that connects the power transmission side device and the power reception side device to each other and fixes the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device Alternatively, in a set of devices that have a structure and are characterized in that transmission and reception of electric power exhibit a predetermined function or performance in a fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a second function for detecting that the power transmitting unit and the power receiving unit are out of the fixed relative positional relationship. A group of devices to be paired, characterized in that the power sending unit stops contactless power transmission when disconnection is detected. A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function, wherein , a mechanism that connects the power transmission side device and the power reception side device to each other and fixes the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device Alternatively, in a set of devices that have a structure and are characterized in that transmission and reception of electric power exhibit a predetermined function or performance in a fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. There is a second function, and when the second function detects that the fixing in the predetermined relative positional relationship is deviated, the power transmission unit stops contactless power transmission,
Moreover, as the first circuit having the first function and the second function, a proximity sensor is arranged in the power transmitting side device including the contactless power supply function, and the proximity sensor is arranged in the power receiving side device including the contactless power receiving function. An object that activates a sensor is arranged, and a first function occurs when the object approaches the proximity sensor, and a second function occurs when the object moves away from the proximity sensor. device group. A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function, wherein , a mechanism that connects the power transmission side device and the power reception side device to each other and fixes the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device Alternatively, in a set of devices that have a structure and are characterized in that transmission and reception of electric power exhibit a predetermined function or performance in a fixed relative positional relationship,
A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. connecting the ends of the C-shaped or U-shaped core in the casing to form a closed core to improve power transmission efficiency;
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. 2, and when the second function detects that it is out of the fixed relative positional relationship, the power transmission unit stops contactless power transmission,
In addition, as a second circuit having the first function and the second function, a light transmitter that emits light to the outside of the power transmission side device including the contactless power supply function, and light from the outside of the device. At the same time, one or more reflecting mirrors or optical fibers are provided on the power receiving side device including the non-contact power receiving function to form an optical path,
Light emitted from the optical transmitter only when the power transmitting side device including the contactless power supply function and the power receiving side device including the contactless power receiving function are fixed in a correct relative positional relationship in the second circuit. is received by the light receiver through an optical path provided with the reflecting mirror or the optical fiber. 5. The method according to claim 4, wherein all or part of an optical path formed by one or a plurality of reflecting mirrors provided in the power receiving device including the contactless power receiving function of the second circuit is formed using a light guide path. A group of equipment that is a set of A group of devices in which power is transmitted and received by pairing a power transmission side device including a contactless power supply function and a power receiving side device including a contactless power reception function corresponding to the contactless power supply function, wherein , a mechanism that connects the power transmission side device and the power reception side device to each other and fixes the relative positional relationship between the power transmission unit of the contactless power supply function and the power reception unit of the contactless power reception function included in each device Alternatively, in a set of devices that have a structure and are characterized in that transmission and reception of electric power exhibit a predetermined function or performance in a fixed relative positional relationship,
There is a first function for detecting that the power transmission unit and the power reception unit are fixed in a predetermined relative positional relationship, and the first function detects that the power transmission unit and the power reception unit are fixed in the predetermined relative positional relationship. If not detected, the power sending unit is prevented from transmitting power in a non-contact manner, and the power sending unit and the power receiving unit are detected to be out of fixed relative positional relationship. There is a second function, and when the second function detects that the fixing in the predetermined relative positional relationship is deviated, the power transmission unit stops contactless power transmission,
Moreover, as the first circuit having the first function and the second function, a proximity sensor is arranged in the power transmitting side device including the contactless power supply function, and the proximity sensor is arranged in the power receiving side device including the contactless power receiving function. An object that activates a sensor is arranged, and a first function occurs when the object approaches the proximity sensor, and a second function occurs when the object moves away from the proximity sensor. A device group that becomes
In addition to the combination of the proximity sensor of the first circuit and the object that activates the proximity sensor, the power transmitting device is provided with an optical transmitter, and the power receiving device is provided with light from the optical transmitter. A light receiver for receiving light and its optical path are provided, the proximity sensor and the object are combined, and the contactless power supply is controlled according to the pattern or order of the combinations detected therein . equipment group. A power transmitting/receiving induction coil and the same induction coil are wound around the power transmitting unit of the power transmitting side device that includes the contactless power supply function and the power receiving portion of the power receiving side device that includes the contactless power receiving function. A C-shaped or U-shaped core open at both ends is enclosed in a magnetically permeable watertight casing, the watertight casings being provided in the close relative position to be wetted by water, and one or both of the watertight casings. An outer core part that is wetted with water is provided by extending from the end of the core enclosed in the casing to the outside of the casing, and furthermore, when the waterproof casing is brought close to and fixed at the relative position, the outer core part is the waterproof casing. 7. A set of devices according to claim 6, wherein the ends of the C-shaped or U-shaped core in the casing are connected to form a closed core to increase power transmission efficiency. The device on the power receiving side has a function of transmitting an optical pulse having a frequency corresponding to the voltage of the power supplied to the connected load, and the device on the power transmitting side has a function of receiving the transmitted optical pulse. a receiving voltage stabilization control circuit configured with a negative feedback control unit that increases or decreases the amount of high-frequency power to be transmitted according to the number of optical pulses per unit time so that the amount of power is reduced when the number of pulses is large. 8. A set of devices according to any one of claims 1 to 7, characterized in that the voltage of the power sent from the power receiving side device to the load is kept constant (target value) by the stabilizing control circuit. The device on the power receiving side has a function of transmitting an optical pulse having a frequency corresponding to the voltage of the power supplied to the connected load, and the device on the power transmitting side has a function of receiving the transmitted optical pulse, and receives the received optical pulse. Detecting an abnormality in the power receiving device based on the number of optical pulses per unit time, and having an abnormality handling circuit for the power receiving device equipped with a function to cut off the high-frequency power transmitted by the power transmission device if there is an abnormality. 9. A set of devices according to any one of 1 to 8.

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