JP2022028173A - Contactless power supply wireless operating system - Google Patents

Abstract

To provide a contactless power supply wireless operating system that is less likely to cause system abnormalities and can operate stably even when a large current flows to a load such as a motor of a mobile unit.SOLUTION: In the contactless power supply wireless operating system, a fixed unit 1 has a first control unit 11, a first wireless device 12, and contactless power supply device 13. A mobile unit 2 has a second wireless device 22, a second control unit 21, a non-contact power receiving device 23, and a first power storage device 24. The second control unit 21 includes a computing circuit 211 and an output stage 212. The mobile unit 2 further has a first power line 28, which supplies power to the second wireless device 22 and the computing circuit 211, and a second power line 29, which supplies power to the output stage 212. A first power storage device 24 is connected to the first power line 28 and stores only power from the first power line 28.SELECTED DRAWING: Figure 1

Description

The present invention relates to a contactless power feeding wireless actuation system.

Power supply rails and cable bears (registered trademarks) are used to operate equipment including moving objects such as machine tools, automated warehouses, measuring instruments, and transport equipment. However, in equipment using power supply rails and cable bears (registered trademark), the generation of particles due to friction, dirt due to refueling to ensure smooth operation, disconnection due to long-term use, etc. are the causes of deterioration in maintainability. It was.

Patent Document 1 discloses a transfer device that transfers a moving body using a non-contact power feeding facility. The transfer device of Patent Document 1 is a transfer device having a long life with good maintainability, in which a feeding rail for passing a high-frequency sinusoidal current is laid along the traveling path on which the moving body travels, and the feeding rail is laid on the moving body. A non-contact power supply facility equipped with a coil that resonates with the frequency of the sinusoidal current flowing through the device and generates an electromotive force is provided, and a motor is provided to drive the gripping, rotation, and ascending / descending of the transferred object by the hand, and the transfer is performed. It has a built-in communication unit that detects the stop position of the control controller of each motor that drives gripping, rotation, and ascending / descending of the object and communicates the detection signal, and guides the moving body along the travel path as a guide. It is configured so that it can be stopped at any position by a signal from the communication unit using a belt.

Japanese Unexamined Patent Publication No. 2000-135694

However, in the transfer device described in Patent Document 1, a current exceeding the capacity of the non-contact power feeding facility may flow due to the start of the driving motor or the inrush current at the time of high load. At this time, the communication unit, which is a control device, may be reset, the memory for recording the position and status of the equipment may be erased, or an error may occur. When such an abnormality occurs, the equipment cannot be restarted unless it is once returned to the origin, and the product being processed becomes defective or a great deal of trouble is required for restarting.

The present invention has been made in view of such a situation, and in a system in which non-contact power supply is performed between a fixed unit and a mobile unit, when a large current flows through a load such as a motor on the mobile unit side. However, the purpose is to provide a non-contact power supply wireless operation system that is less likely to cause system abnormalities and can operate stably.

The non-contact power feeding wireless operation system of the present invention for solving the above-mentioned problems is

(1) A non-contact power supply wireless operation system consisting of a fixed unit and a mobile unit.
The fixed unit has a first control device, a first wireless device connected to the first control device, and a non-contact power feeding device.
The mobile unit has a second wireless device, a second control device, a non-contact power receiving device that receives electric power from the non-contact power feeding device, and a first power storage device. The control device 2 communicates with the first wireless device via the second wireless device, and includes an arithmetic circuit and an output stage.
The mobile unit is further connected to the non-contact power receiving device to supply power to the second wireless device and the arithmetic circuit, and the output stage is connected to the non-contact power receiving device. Has a second power line, which supplies power to the
The first power storage device is a non-contact power supply wireless operation system, which is connected to the first power supply line and is characterized in that only the power of the first power supply line is stored.

According to the above invention, even if a large current flows through the load connected to the output stage of the mobile unit and the voltage of the second power supply line drops, the first power supply line is not affected and the first power supply line is not affected. It is possible to provide a non-contact power supply wireless operation system that is less likely to cause a system abnormality by avoiding resetting of a wireless device and an arithmetic circuit and data omission.

Further, the non-contact power feeding wireless operation system of the present invention preferably has the following aspects.

(2) The non-contact power supply radio according to (1), wherein a backflow prevention circuit is arranged between the non-contact power receiving device of the first power supply line and the first power storage device. Acting system.

According to the above invention, the backflow prevention circuit can prevent the current from the first power storage device to the second power supply line, and can more reliably prevent the voltage drop of the first power supply line.

(3) The non-contact power feeding wireless operation system according to (2), wherein the first power supply line further has a stabilizing circuit after the first power storage device.

By having a stabilizing circuit after the first power storage device, it is possible to stably supply power to the second control device and the second wireless device with a simple structure even if the second power supply line fluctuates. , The first power supply line can be stabilized.

(4) The non-contact power feeding device has a first power feeding circuit and a second power feeding circuit.
The non-contact power receiving device is
A first power receiving circuit that is coupled to the first power supply circuit and is connected to the first power supply line.
A second power receiving circuit that is coupled to the second power supply circuit and connected to the second power supply line,
The non-contact power supply wireless operation system according to (1), which comprises.

By separating the first power supply line and the second power supply line from the power receiving circuit, the influence of the voltage fluctuation in the second power supply line on the first power supply line can be easily eliminated.

(5) The non-contact power receiving device is
The first power receiving circuit connected to the first power supply line and
It consists of a second power receiving circuit connected to the second power supply line.
The non-contact power supply wireless operation system according to (1), wherein the power receiving circuits coupled to the non-contact power supply device are alternately replaced.

According to the above invention, electric power can be efficiently supplied from one power supply device to the first power supply line and the second power supply line.

(6) The non-contact power supply wireless operation system according to (5), wherein the first power receiving circuit and the second power receiving circuit are arranged along the moving direction of the mobile unit.

According to the above invention, since the power receiving circuits are arranged along the moving direction of the power receiving unit, the side that supplies power can be easily replaced with the movement of the power receiving unit.

(7) The non-contact power feeding device has a power transmission coil, the non-contact power receiving device has a power receiving coil, and the non-contact power feeding device and the non-contact power receiving device are coupled by magnetic coupling. The non-contact power transmission wireless operation system according to any one of (1) to (6).

According to the above invention, since the power feeding device and the power receiving device are coupled by using magnetic coupling, a large amount of power can be transmitted at a low frequency of 200 kHz or less, and the influence of spurious emission can be reduced.

(8) The non-contact power supply wireless operation system according to any one of (1) to (7), wherein the second power supply line is provided with a second power storage device.

According to the above invention, since the power can be supplied to the load regardless of whether or not the power is supplied to the second power line, the load can be stably operated. It is particularly effective for the invention according to (5), in which electric power may not be supplied in some cases.

(9) The non-contact power supply wireless operation system according to any one of (1) to (8), wherein the control device includes a sensor and the sensor is connected to the arithmetic circuit.

According to the above invention, the control device includes a sensor, and the sensor is connected to the arithmetic circuit, so that the load of the motor or the like can be precisely controlled based on the position, state, and the like of the moving unit.

(10) The non-contact power supply wireless operation system is any one of an automatic transfer device, a processing machine, an automated warehouse, a robot, a measuring instrument, and a machine tool, according to any one of (1) to (9). The contactless power supply wireless actuation system described.

According to the above invention, since the arithmetic circuit and the wireless device can be stably operated, it is possible to provide a system in which system abnormality is less likely to occur and maintenance is good.

The non-contact power supply wireless operation system of the present invention is a system that performs non-contact power supply between a fixed unit and a mobile unit. Compared to conventional systems that include mobiles that require contact power or cable power, they are easier to maintain and easier to maintain.

In the non-contact power supply wireless operation system of the present invention, the mobile unit includes a first power supply line for supplying power to the arithmetic circuit of the control device and a second power supply line for supplying power to the load from the output stage. Even when a large current flows through the second power supply line due to startup or the like, it is possible to suppress voltage fluctuations in the first power supply line on the control side. As a result, the possibility of causing a system abnormality in the control device and the wireless device of the mobile unit is prevented, and the system can be operated stably.

It is a block diagram of the non-contact power supply wireless operation system of Embodiment 1 of this invention. It is a block diagram of the non-contact power supply wireless operation system of Embodiment 2 of this invention. It is a block diagram of the non-contact power supply wireless operation system of Embodiment 3 of this invention. It is a block diagram of the non-contact power supply wireless operation system of Embodiment 4 of this invention. It is explanatory drawing of the automatic transfer apparatus using the non-contact power supply wireless operation system of this invention, (a) shows schematically the whole structure of the automatic transfer apparatus, (b) shows the carriage which is a mobile unit. It is explanatory drawing of the XY table using the non-contact power supply wireless operation system of this invention. It is a circuit diagram of an example of the mobile unit of the non-contact power supply wireless operation system of Embodiment 1 of this invention. It is a circuit diagram of an example of the mobile unit of the non-contact power supply wireless operation system of Embodiment 3 of this invention. It is a modification of the output stage of Embodiment 1, (a) shows an output stage by a transistor, (b) shows an output stage by a relay, and (c) shows a three-phase inverter circuit using an IGBT. The combination of the non-contact power feeding device and the non-contact power receiving device of the non-contact power feeding wireless operation system of the present invention is shown. In (a), one circular coil is used, and in (b), two circular coils are used. What is used, (c) is a coil of a non-contact power receiving device using a core, (d) is a combination of an oval feeding coil and a circular power receiving coil, and (e) is a plurality of feeding coils and 1 The combination of the power receiving coils is shown.

Embodiments 1 to 4 of the non-contact power supply wireless operation system of the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is a block diagram of the non-contact power feeding wireless operation system according to the first embodiment of the present invention. The contactless power supply wireless actuation system comprises one or more fixed units 1 and one or more mobile units 2. In FIG. 1, for simplification, only one fixed unit 1 and one moving unit 2 are shown. The fixed unit 1 includes a first control device 11, a first wireless device 12 connected to the first control device 11 by a wired or wireless communication line, and a non-contact power feeding device 13. The mobile unit 2 includes a second control device 21, a second wireless device 22, a non-contact power receiving device 23, and a first power storage device 24. The second control device 21 includes an arithmetic circuit 211 and an output stage 212. The output stage 212 is connected to the load 27. In the present embodiment, the load 27 is a motor that moves the moving unit 2.

The mobile unit 2 further includes a first power supply line 28 and a second power supply line 29. The first power supply line 28 and the second power supply line 29 are connected to the non-contact power receiving device 23, and the electric power obtained by the non-contact power receiving device 23 is connected to the first power supply line 28 and the second power supply line 29. Will be distributed. The first power supply line supplies power to the arithmetic circuit 211 of the second wireless device 22 and the control device 21. The second power supply line 29 supplies power to the output stage 212 of the second control device 21.

The non-contact power feeding device 13 on the fixed unit 1 side includes a system of non-contact power feeding circuits. The non-contact power receiving device 23 on the mobile unit 2 side also includes a system of non-contact power receiving circuits. The non-contact power feeding device 13 and the non-contact power receiving device 23 each have a coil.

Power is supplied by magnetic coupling between the non-contact power feeding device 13 on the fixed unit 1 side and the non-contact power receiving device 23 on the mobile unit 2. The non-contact feeding method is not particularly limited, but it is preferably an inductive coupling type (electromagnetic induction method or magnetic field resonance method) non-contact feeding using magnetic field coupling.

10 (a), 10 (c), 10 (d), and 10 (e) show an example of a combination of the coil used for the non-contact power feeding device 13 and the non-contact power receiving device 23 of the present embodiment. FIG. 10A shows an example of a combination in which one circular coil 52 is used for both the non-contact power feeding device 13 and the non-contact power receiving device 23. FIG. 10C shows an example of a combination in which a ferrite core is used for the coil 53 of the non-contact power receiving device 23. FIG. 10D shows an example in which an oval power feeding coil 54 is applied to the non-contact power feeding device 13 and a circular power receiving coil 52 is combined with the non-contact power receiving device 23. FIG. 10E shows an example in which a plurality of power feeding coils 52 and one power receiving coil 52 are combined.

In the combination of the coils 52 of FIG. 10A, the moving unit 2 can supply power only at a specific position. On the other hand, in FIG. 10D, by using the oval coil 54 for the non-contact power feeding device 13 and the non-contact power receiving device 23, the oval coil 54 can be magnetically coupled at all times to operate the load at all times. By using a ferrite core inside the circular coil 53 as shown in FIG. 10 (c), the number of coil turns can be reduced. Further, by appropriately adjusting the size of the core with respect to the coil 53, it is possible to improve the power transmission efficiency when the position of the coil 53 is deviated.

FIG. 7 shows an example of the circuit diagram of the mobile unit 2. The non-contact power receiving device 23 includes a power receiving circuit including a coil. A backflow prevention circuit 26 and a first power storage device 24 are connected to the first power supply line 28 after the non-contact power receiving device 23. A backflow prevention circuit 26 is arranged between the non-contact power receiving device 23 of the first power supply line 28 and the first power storage device 24, and further, a stabilization circuit 41 is provided after the first power storage device 24. It is arranged and stabilizes the voltage. The first power supply line 28 supplies DC power to the second wireless device 22 and the arithmetic circuit 211.

In the present embodiment, the backflow prevention circuit 26 is configured by a FET (Field Effect Transistor). By configuring the backflow prevention circuit 26 with FETs that have a small ON resistance and can reduce the voltage drop between _VDSs , the output voltage of the non-contact power receiving device can be reduced. However, the element applicable to the backflow prevention circuit 26 is not limited to the FET, and may have a function of cutting off the power of the first power storage device toward the second power supply line, such as a diode, a DD converter, and a linear charger. For example, the type of element is not particularly limited.

Information is exchanged between the first wireless device 12 of the fixed unit 1 and the second wireless device 22 of the mobile unit 2 by wireless communication. As a communication method, any wireless communication method such as communication between a wireless LAN base station and a wireless LAN terminal, communication between a mobile phone base station and a communication module, or communication between wireless microcomputer modules can be used. Further, the second control device 21 of the mobile unit 2 is connected to the second wireless device 22 by a wired or wireless communication line 51, and the first fixed unit 1 is connected to the second wireless device 22 via the second wireless device 22. Communicates with the wireless device 12.

The arithmetic circuit 211 of the second control device 21 transmits a control signal to the output stage 212 to control the electric power supplied to the load 27. The output stage 212 can be configured by FET. FIG. 7 shows an output stage 212 to which a MOS-FET is applied as an example, but in addition to this, an inverter circuit using a transistor (FIG. 9 (a)), a relay (FIG. 9 (b)), and an IGBT is shown. (FIG. 9 (c)) and the like can be applied to the output stage 212.

In the present embodiment, the control signal emitted from the first control device 11 to the motor of the load 27 is transmitted from the first radio device to the second control device 21 via the second radio device 22. It is input and converted into a control signal for operating the motor in the arithmetic circuit 211. This control signal is transmitted to the output stage 212. By controlling the supply of electric power by the FET of the output stage 212, the operation of the motor is controlled to control the movement of the entire mobile unit 2. That is, the output stage 212 supplies the electric power supplied from the second power supply line 29 to the load 27 at the current value and timing specified by the control signal of the first control device 11.

In the present embodiment, the stabilizing circuit 41 is provided after the first power storage device 24 of the first power supply line.
For example, when the second control device 21 having an input voltage range of 4 to 5.5 V is designed to supply a voltage of 5 V, and the output voltage of the non-contact power receiving device 23 is designed to be 10 V or more, which is 1 V or more higher. explain.
The output from the non-contact power receiving device 23 goes through the second power supply line 29 which is directly connected to the motor which is the load, the backflow prevention circuit 26, and the stabilizing circuit 41, and the second wireless device 22 and the second control device. It is divided into a first power supply line 28 connected to 21. In the second power supply line 29, a large current flows at the time of starting the motor and at the time of a large load, and the voltage is lowered and fluctuated. On the other hand, in the first power supply line 28, the first power storage device 24 is charged through the backflow prevention circuit 26, and further stabilized by the stabilization circuit 41 to the second wireless device 22 and the second control device 21. Since it is supplied, it can be controlled stably.
This configuration is particularly effective when a power storage device such as an electric double layer capacitor or an electrolytic capacitor that stores electricity corresponding to a voltage is used. Such a power storage device has a long life and a high reliability, but has a characteristic that the voltage decreases as it is discharged, and is used as a power source for an IC having a narrow input voltage range. Is particularly effective.
In the second power supply line 28, for example, in the stable state, the output voltage of the non-contact power receiving device 23 is reduced by 1 V in the backflow prevention circuit 26 and 4 V in the stabilizing circuit 41, and the stabilized voltage of 5 V is reduced to the second. 21 and the second radio device 22 are supplied. At this time, a voltage of 9 V is applied to the first power storage device 24 made of a large-capacity electrolytic capacitor.
When a load is applied to the motor and the output voltage of the non-contact power receiving device 23 drops to, for example, 3V, the backflow prevention circuit 26 prevents the electrical energy of the first power storage device 24 from flowing out to the second power supply line. The electric energy stored in the power storage device 24 of 1 is supplied to the second control device 21 and the second radio device 22 through the stabilization circuit 41. Initially, the first power storage device 24 supplies a voltage of 9 V, but the voltage gradually decreases as it is released. In the present embodiment, since the stabilizing circuit 41 is provided after the first power storage device 24, the second control device 21 and the second control device 21 and the second are stable even if the voltage of the first power storage device 24 drops. The wireless device 22 can be operated, and a simple and highly reliable non-contact wireless operation system can be provided.
The potential difference of the stabilizing circuit 41 is preferably 1 V or more. The potential difference of the stabilizing circuit 41 causes a loss of energy, but since the electric energy consumed by the second wireless device 22 and the second control device 21 in the first power supply line 28 is small, heat generation does not become a problem. Rather, by designing a large potential difference applied to the stabilizing circuit 41, it is possible to improve the reliability when the voltage of the non-contact power receiving device 23 drops.

In the present embodiment, the power storage device is not arranged in the second power supply line 29. Therefore, the load 27 can be operated only while the non-contact power supply is being performed, but conversely, if the non-contact power supply is always performed, the load can be always operated.

The second power supply line 29 in the present embodiment has a structure in which the voltage fluctuates due to the movement of the mobile unit 2 or the activation of the load 27. However, since the backflow prevention circuit 26 is arranged in the first power supply line 28, the first power supply line 28 can always maintain a constant voltage. As a result, resetting and malfunction of the arithmetic circuit 211 of the second control device 21 and the second wireless device 22 are less likely to occur, and it is possible to provide a system with good maintainability in which the occurrence of defects is suppressed. can.

<Embodiment 2>
FIG. 2 shows a block diagram of the non-contact power supply wireless operation system according to the second embodiment of the present invention. Overlapping description is omitted for the elements having the same configuration as that of the first embodiment. In the non-contact power feeding wireless operation system of the present embodiment, the fixed unit 3 includes a system of non-contact power feeding devices 13, and the mobile unit 4 includes a system of non-contact power receiving devices 23. The electric power obtained by the non-contact power receiving device 23 is distributed to the first power supply line 28 and the second power supply line 29. A backflow prevention circuit 26 and a first power storage device 24 are connected to the first power supply line 28 side after the non-contact power receiving device 23. The first power supply line 28 supplies the power of the second wireless device 22 and the arithmetic circuit 211 of the second control device 21.

In the present embodiment, the second power storage device 25 is connected between the non-contact power receiving device 23 of the second power supply line 29 and the output stage 212. By storing electricity in the second electricity storage device 25, it is possible to supply electric power to the load 27 while the electric power is not being transmitted from the non-contact power feeding device 13.

The load 27 of the mobile unit 4 usually consumes more power than the second control device 21 and the second radio device 22. Therefore, it is preferable to use a second power storage device 25 that supplies power to the load 27, which can cope with a larger fluctuation in voltage than the first power storage device 24 and has a large capacity. In the present invention, since the first power storage device 24 and the second power storage device are arranged and separated from each other on different power supply lines, the first power storage device 24 supplies power to the second power supply line 29. do not do. Therefore, even when a power storage device having a small capacity is applied to the first power storage device 24, the power of the second wireless device 22 and the second control device 21 can be stably supplied. The output stage 212 is related to both the first power supply line 28 and the second power supply line 29, and has a function of controlling the current of the second power supply line 29 based on the control signal on the first power supply line 28 side. I am doing. However, since the load 27 consumes very little power of the first power supply line 28, controlling the load 27 by the output stage 212 does not affect the voltage on the first power supply line 28 side.

When FETs, thyristors, and IGBTs are applied to the output stage 212, they are switched by the gate voltage, so that the voltage fluctuation given to the first power supply line can be reduced depending on the magnitude of the current supplied to the load 27. Further, when a relay is used for the output stage 212, the relay opens and closes the contacts by the current flowing through the coil, so that the influence on the first power supply line can be reduced depending on the magnitude of the current supplied to the load 27.

Further, in the present embodiment, the second control device 21 includes the sensor 213. The sensor 213 is not particularly limited, but is, for example, an encoder for confirming the position, a photoelectric sensor, a satellite positioning system, a photoelectric sensor for counting the rotation of the spindle, the inside of the mobile unit 4, the ambient temperature, light, voltage, and current. Any detector, such as a sensor that continuously monitors such things, can be connected. In addition, a plurality of sensors of the same or different types can be connected. The data input from the sensor 213 is an important source of information that controls the movement of the entire contactless power supply wireless operating system.

When the power of such a sensor 213 is cut off, data is lost. In the encoder, the position shift, and in the photoelectric sensor that monitors the position and rotation, a reading error may cause malfunction. In addition, data loss occurs during this period in the sensor that monitors continuous data, and for example, in the protection circuit that monitors current, it causes a problem that it cannot operate normally when an inrush current is generated. However, in the present embodiment, since the sensor 213 is supplied with electric power from the first power supply line 28, it is not affected by the fluctuation of the electric power of the second power supply line 29 and stably detects various data. be able to.

According to the present embodiment, as in the first embodiment, the second power supply line 29 has a structure in which the voltage fluctuates due to the movement of the mobile unit 4 and the activation of the load 27. However, by providing the backflow prevention circuit 26, the first power supply line 28 can always maintain a constant voltage, resetting the arithmetic circuit 211, reading error of the sensor 213, etc. are less likely to occur, and maintenance is good. The system can be provided.

<Embodiment 3>
FIG. 3 is a block diagram of the non-contact power feeding wireless operation system according to the third embodiment of the present invention.

In the third embodiment, the non-contact power feeding device 13 of the fixed unit 5 has a first power feeding circuit 131 and a second power feeding circuit 132. Further, the non-contact power receiving device 23 of the mobile unit 6 includes a first power receiving circuit 231 connected to the first power supply line 28 and a second power receiving circuit 232 connected to the second power supply line 29. There is. The first power receiving circuit 231 is coupled to the first power feeding circuit 131. The second power receiving circuit 232 is coupled to the second feeding circuit 132. In this embodiment, the backflow prevention circuit is not an essential component. In the present embodiment, since the first power supply line 28 and the second power supply line 29 are separated from the stage in the non-contact power receiving device 23, they do not affect each other due to voltage fluctuations.

FIG. 10B shows the arrangement of the coil 52 of the non-contact power feeding device 13 and the non-contact power receiving device 23 of the present embodiment. The coil 52 of the first power feeding circuit 131 and the coil 52 of the first power receiving circuit 231 are paired, and the coil 52 of the second power feeding circuit 132 and the coil 52 of the second power receiving circuit 232 are paired. There is. The coils 52 in FIG. 10B are arranged along the moving direction of the moving unit 6, but as a modification, they may be arranged perpendicular to the moving unit 6.

FIG. 8 shows an example of a circuit diagram of the mobile unit 6. The first power receiving circuit 231 and the second power receiving circuit 232 each include a power receiving circuit having a coil. In this embodiment, a one-chip microcomputer in which the second wireless device 22 and the arithmetic circuit 211 are integrated is used. The linear charger 42 is connected between the first power receiving circuit 231 of the first power supply line 28 and the first power storage device 24, and receives a DC voltage to charge the first power storage device 24. A DC / DC converter 43 is connected to the output side of the first power storage device 24, and the second wireless device 22, the arithmetic circuit 211, and the sensor 213 are supplied with stabilized DC power corresponding to their respective ratings. do. Further, a linear charger 42 corresponding to a larger capacity current is arranged in the second power supply line 29 to charge the second power storage device 25. The output stage 212 is composed of a FET as in the first embodiment, and uses a photocoupler having a built-in phototransistor as a gate voltage control element of the FET. Since it has such a structure, the first power supply line 28 and the second power supply line 29 are isolated by using a photocoupler.
In this embodiment, a lithium ion secondary battery is used for both the first power storage device and the second power storage device. A linear charger is used to properly charge the lithium-ion secondary battery. Further, a one-chip microcomputer in which the second wireless device 22 and the arithmetic circuit 211 are integrated is used. The voltage of the lithium-ion secondary battery, which becomes 4.2V when fully charged, is stabilized to 3.3V by the DC / DC converter so that it is not applied to the one-chip microcomputer.

According to the present embodiment, since the first power supply line 28 and the second power supply line 29 are separated at the stage of the power receiving circuit, they are less likely to be affected by voltage fluctuations. Therefore, without making the backflow prevention circuit an indispensable component, it is possible to provide a system with good maintainability because resetting of the arithmetic circuit 211 and reading error of the sensor 213 are less likely to occur.

<Embodiment 4>
FIG. 4 is a block diagram of the non-contact power feeding wireless operation system according to the fourth embodiment of the present invention.

In the present embodiment, with respect to the third embodiment, the first power receiving circuit 231 and the second power receiving circuit 232 of the mobile unit 8 share one power feeding circuit of the non-contact power feeding device 13 of the fixed unit 7. The point is different. As an example of such a case, there is an example in which the number of coils 52 of the non-contact power feeding device 13 is smaller than the number of coils 52 of the non-contact power receiving device 23. For example, for one power feeding coil 52, one power receiving coil 52 of the first power supply line 28 and one power receiving coil 52 of the second power supply line 29 alternately alternate to receive power.

Such a structure can be realized by arranging the power receiving coil 52 facing the feeding coil 52 along the moving direction of the moving unit 8 when the moving unit 8 moves sequentially, and simplifies the entire system. can. For example, in FIG. 4, when the moving unit 8 moves in the vertical direction indicated by the arrow, one power receiving coil charges the first power receiving circuit 231 and the second power receiving circuit.

According to the present embodiment, since the first power supply line 28 and the second power supply line 29 are separated at the stage of the power receiving circuit, they are less likely to be affected by voltage fluctuations. Therefore, as in the third embodiment, the power supply lines of each other are less likely to be affected by the voltage fluctuation, the reset of the arithmetic circuit 211, the reading error of the sensor 213, and the like are less likely to occur, and a system with good maintainability can be provided. ..

Further, the non-contact power supply wireless operation system of the present invention can be used for equipment and mechanical devices including various mobile units supplied with power from a fixed unit.

As an application example of the non-contact power feeding wireless operation system of the present invention, an automatic transfer device is shown in FIG. FIG. 5A schematically shows an orbit 31 provided with a fixed unit 3 and a plurality of moving units 4 on the orbit. FIG. 5B shows the configuration of a dolly that embodies the mobile unit 4. In the automatic transfer device, a photoelectric sensor for detecting the position of the trolley, a rotary encoder, a satellite positioning system, or the like can be applied as the sensor 213.

As another example embodying the present invention, FIG. 6 shows an XY table. The XY table includes two moving units, a Y-axis slider 10a and an X-axis slider 10b. In the XY table, any sensor such as a rotary encoder or a range finder that detects a precise position can be applied as the sensor 213.

Further, the load of the present invention is not limited to the motor that moves the moving unit, but is arbitrary that consumes electric power such as a spindle motor that processes a work, processing performed on the moving unit, power required for operation, and a heat source. Mechanical equipment can be applied. As an example, various things such as a heater, a speaker, a magnetron that generates an electromagnetic wave, and an induction coil can be applied. Further, the motor may have any specifications, and is not particularly limited to a DC motor, an AC motor, a stepping motor, a servo motor, and the like.

1,3,5,7 Fixed unit 2,4,6,8,10a,10b Mobile unit 11 First control device 12 First radio device 13 Contactless power supply device 21 Second control device 22 Second radio Device 23 Non-contact power receiving device 24 First power storage device 25 Second power storage device 26 Backflow prevention circuit 27 Load 28 First power supply line 29 Second power supply line 131 First power supply circuit 132 Second power supply circuit 211 Calculation Circuit 212 Output stage 213 Sensor 231 First power receiving circuit 232 Second power receiving circuit 52 Coil

Claims (10)

A non-contact power supply wireless operating system consisting of a fixed unit and a mobile unit.
The fixed unit has a first control device, a first wireless device connected to the first control device, and a non-contact power feeding device.
The mobile unit has a second control device, a second wireless device, a non-contact power receiving device that receives electric power from the non-contact power feeding device, and a first power storage device. The control device 2 communicates with the first wireless device via the second wireless device, and has an arithmetic circuit and an output stage.
Further, the mobile unit is connected to the non-contact power receiving device to supply power to the second wireless device and the arithmetic circuit, and the output stage is connected to the non-contact power receiving device. Has a second power line, which supplies power to the
The first power storage device is connected to the first power supply line, and is a non-contact power supply wireless operation system characterized in that only the power of the first power supply line is stored. The non-contact power supply wireless operation system according to claim 1, wherein a backflow prevention circuit is arranged between the non-contact power receiving device of the first power supply line and the first power storage device. The non-contact power feeding wireless operation system according to claim 2, wherein the first power supply line further has a stabilizing circuit after the first power storage device. The non-contact power feeding device has a first power feeding circuit and a second power feeding circuit.
The non-contact power receiving device is
A first power receiving circuit that is coupled to the first power supply circuit and is connected to the first power supply line.
A second power receiving circuit that is coupled to the second power supply circuit and connected to the second power supply line,
The non-contact power supply wireless operation system according to claim 1, wherein the system comprises. The non-contact power receiving device is
The first power receiving circuit connected to the first power supply line and
It consists of a second power receiving circuit connected to the second power supply line.
The non-contact power supply wireless operation system according to claim 1, wherein the power receiving circuits coupled to the non-contact power supply device are alternately replaced. The non-contact power supply wireless operation system according to claim 5, wherein the first power receiving circuit and the second power receiving circuit are arranged along the moving direction of the mobile unit. The claim is characterized in that the non-contact power feeding device has a power transmission coil, the non-contact power receiving device has a power receiving coil, and the non-contact power feeding device and the non-contact power receiving device are coupled by magnetic coupling. Item 2. The non-contact power transmission wireless operation system according to any one of Items 1 to 6. The non-contact power feeding wireless operation system according to any one of claims 1 to 7, wherein the second power supply line is provided with a second power storage device. The non-contact power supply wireless operation system according to any one of claims 1 to 8, wherein the second control device includes a sensor, and the sensor is connected to the arithmetic circuit. The non. Contact power supply wireless actuation system.

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