JPWO2018158856A1 - Non-contact power receiving apparatus and non-contact power feeding system - Google Patents

Abstract

The non-contact power receiving apparatus includes a power receiving element that receives power in a non-contact manner, a power receiving circuit that outputs electric power and outputs a control voltage and a power voltage, and a standby power source that compensates the control voltage when the power decreases or disappears And a safety circuit that operates at the control voltage compensated by the standby power source and safely stops and controls the power load that operates at the power voltage when the power is reduced or disappears.

Description

  The present specification relates to a non-contact power receiving apparatus that receives electric power in a non-contact manner, and a non-contact power feeding system including the non-contact power receiving apparatus.

  A technique for mass-producing circuit boards by performing various operations (hereinafter referred to as “to-substrate operations”) for mounting electronic components (hereinafter referred to as “components”) on a printed wiring board has become widespread. . There are a solder printing machine, a component mounting machine, a reflow machine, a board inspection machine, and the like as a board working machine for performing the board working. It is common to configure a component mounting line by connecting these machine-to-board machines. In recent years, a technique for applying a non-contact power feeding system has been developed as means for feeding power to a movable part of a substrate working machine.

  By applying the non-contact power supply system, it is not necessary to secure the wiring route of the power supply line, and there is no risk of fatigue due to repeated deformation of the power supply line or wear of the sliding power supply unit. The application of the non-contact power supply system is not limited to the component mounting line, but covers a wide range of fields such as assembly lines for assembling other products, machine tools for processing members, and power supply to electric vehicles. A technical example relating to this type of non-contact power feeding system is disclosed in Patent Document 1.

  Patent document 1 is disclosing the electric lock system which controls locking / unlocking electrically electrically using the power supply supplied with a non-contact electric power feeding system. This electric lock system has a function of locking / unlocking control and wirelessly transmits a state signal indicating the open / closed state of the door and the presence / absence of power supply, a control panel for performing power supply control based on the received state signal, . Furthermore, in an aspect in which the electric lock device includes the power storage unit, locking / unlocking control is possible even when power supply is stopped. According to this, it is said that the battery exchange which was the weak point of the electric lock which integrated the control function becomes unnecessary, and the wiring construction in the door becomes unnecessary, and the installation cost can be reduced.

JP 2009-191581 A

  By the way, in the technique of Patent Document 1, a large power storage capacity is required in the power storage unit in order to perform locking and unlocking even when the power supply is stopped, and the device cost increases. In the configuration in which the power storage unit is omitted, when the power supply is stopped, the open / close state of the door becomes uncertain, and in addition, the state signal cannot be wirelessly transmitted.

  Similar problems can occur in a non-contact power feeding system applied to a substrate working machine. For example, a non-contact power receiving device provided in a movable part of a substrate working machine often includes a power receiving circuit that outputs a power voltage for a power load and a control voltage for a control load. Here, if any failure occurs in the non-contact power feeding, both the power voltage and the control voltage are reduced or lost. Then, the power load may operate without being controlled, operate due to inertia or gravity, or drop the held equipment or member, which may cause trouble. This type of problem is common to many contactless power supply systems in a wide range of fields.

  The present specification provides a contactless power receiving device capable of safely stopping and controlling a power load when contactless power supply is reduced or stopped, and suppressing an increase in device cost, and includes the contactless power receiving device. It is a problem to be solved to provide a non-contact power feeding system configured by the above.

  The present specification includes at least one power receiving element that receives power in a non-contact manner, a power receiving circuit that receives the power and outputs a control voltage and a power voltage, and the control voltage when the power decreases or disappears. A safety circuit that operates with the control voltage compensated by the standby power supply and that safely stops and controls the power load that operates with the power voltage when the power decreases or disappears, A non-contact power receiving apparatus comprising:

  The present specification also includes the above-described contactless power receiving device, a power transmitting element that supplies the power to the power receiving element in a contactless manner, and a contactless power transmitting device that includes a power supply circuit that supplies the power to the power transmitting element. The non-contact electric power feeding system provided with these is disclosed.

  According to the contactless power receiving device and the like disclosed in this specification, when the power received by the power receiving element decreases or disappears due to a decrease or stop of the contactless power feeding, until the power voltage disappears due to the action of the standby power supply. A control voltage is secured. Therefore, the safety circuit can safely stop and control the power load before the control voltage disappears, and can prevent trouble. Furthermore, since the standby power source only needs to compensate for a control voltage that consumes less power than the power voltage, a small power source capacity is sufficient. Therefore, an increase in device cost is suppressed.

It is the perspective view which showed the structure of the component mounting line to which the non-contact electric power feeding system of 1st Embodiment is applied. It is a block diagram which shows the function structure of the non-contact electric power feeding system of 1st Embodiment. It is a block diagram which shows the function structure of the non-contact electric power feeding system of 2nd Embodiment. It is a block diagram which shows the function structure of the non-contact electric power feeding system of 3rd Embodiment.

1. Example of application location of contactless power supply system 1 of the first embodiment A contactless power supply system 1 of the first embodiment will be described with reference to FIGS. 1 and 2. First, the structure of the component mounting line 9 which is an example of the application part of the non-contact electric power feeding system 1 is demonstrated. FIG. 1 is a perspective view showing a configuration of a component mounting line 9 to which the non-contact power feeding system 1 of the first embodiment is applied. The component mounting line 9 includes a plurality of substrate work machines arranged in a line. That is, a solder printer 91, a printing inspection machine 92, a first component mounting machine 93, a second component mounting machine 94, a third component mounting machine 95, a board appearance inspection machine (not shown), and a reflow machine (not shown) are described. Are arranged in order.

  Each of the on-board work machines performs a predetermined work on the board, that is, a on-board work. Specifically, the solder printer 91 prints paste solder on the substrate in a predetermined pattern shape. The print inspection machine 92 images and inspects the solder printing state of the board. The first component mounting machine 93, the second component mounting machine 94, and the third component mounting machine 95 collect components from the component supply device and mount them on the solder on the board. The board appearance inspection machine inspects the appearance state by imaging the parts mounted on the board. The reflow machine ensures soldering of components by heating and cooling the solder. The board-to-board work is not limited to the above-described work contents, and includes accompanying works. For example, the board loading / unloading work and the positioning work, and the checking work for imaging the board and parts and grasping their positions and postures are also included in the board work.

  The first component mounting machine 93, the second component mounting machine 94, and the third component mounting machine 95 have the same structure. The component mounting machine (93, 94, 95) includes a component supply device 87, a spare feeder storage device 88, a substrate transfer device and a component transfer device that are not visible in FIG.

  The component supply device 87 is disposed at a substantially intermediate height on the front side of the machine base 99. The component supply device 87 has a plurality of slots extending in the front-rear direction and parallel to each other. A feeder 89 is attached to each slot of the component supply device 87. The feeder 89 holds a reel on which a carrier tape containing a plurality of components is wound. The feeder 89 feeds out the carrier tape at a constant pitch and supplies parts one by one at a predetermined position. The feeder 89 has a common shape so that the first component mounting machine 93, the second component mounting machine 94, and the third component mounting machine 95 can be used interchangeably. The feeder 89 is an example of an exchange unit that is used after being exchanged by the component mounting machines (93, 94, 95).

  The spare feeder storage device 88 is disposed below the component supply device 87 on the front side of the machine base 99. The spare feeder storage device 88 has a plurality of slots extending in the front-rear direction and parallel to each other. In each slot of the spare feeder storage device 88, a spare feeder 89 ready for use is temporarily stored. The substrate transfer device carries in, positions, and carries out the substrate. The component transfer device collects a component from the component supply device 87 using a component mounting tool such as a suction nozzle and mounts the component on the substrate.

  The component mounting line 9 is provided with a feeder storage device 96, a line management device 97, and a mobile exchange device 8. The feeder storage device 96 is disposed adjacent to the solder printer 91. The feeder storage device 96 has a plurality of slots extending in the front-rear direction and parallel to each other. In each slot of the feeder storage device 96, a feeder 89 ready for use is stored.

  The line management device 97 is disposed adjacent to the feeder storage device 96. The line management device 97 is connected to a plurality of substrate work machines in communication. The line management device 97 manages job data describing the work contents of the work for different boards for each type of board. The line management device 97 sends the respective job data to the plurality of substrate working machines based on the production plan. The line management device 97 further monitors the operation status of the plurality of substrate work machines.

  The mobile exchange device 8 automatically exchanges the feeder 89. Specifically, the mobile exchange device 8 exchanges the feeder 89 between the component supply device 87 of the component mounting machine (93, 94, 95) and the spare feeder storage device 88. Further, the mobile exchange device 8 moves between the component mounting machines (93, 94, 95) and the feeder storage device 96, and conveys and exchanges the feeder 89.

  The mobile exchange device 8 includes a mobile exchange unit 81, a drive unit 82, a middle rail 83, a lower rail 84, the exchange control unit 4 (see FIG. 2), and the like. The middle rail 83 and the lower rail 84 are provided on the front surface of the machine base 99 of the plurality of substrate work machines and the front surface of the feeder storage device 96, respectively. The middle rail 83 and the lower rail 84 extend in the line length direction of the component mounting line 9 (left and right direction in FIG. 1). The height position of the middle rail 83 is unified between the component supply device 87 and the spare feeder storage device 88. The height position of the lower rail 84 is unified on the lower side of the spare feeder storage device 88. Thus, the plurality of middle rails 83 and the plurality of lower rails 84 form two long tracks that are parallel to each other from the feeder storage device 96 to the third component mounting machine 95.

  The movable exchange unit 81 is movably loaded on the middle rail 83 and the lower rail 84. The movable exchange unit 81 includes a clamp mechanism 85 (see FIG. 2) for gripping and releasing the feeder 89, and an operation mechanism 86 (see FIG. 2) for operating the gripped feeder 89. The operation mechanism 86 has a function of inserting and attaching the feeder 89 into the slot, a function of removing the feeder 89 from the slot, and a function of raising and lowering the feeder 89 inside the movable exchange unit 81. The clamp mechanism 85 and the operation mechanism 86 are power loads that operate when supplied with a power voltage Vm described later.

  The drive unit 82 is provided at a substantially intermediate height of the movable exchange unit 81. The drive unit 82 generates a propulsive force between the intermediate rail 83 and drives the movable exchange unit 81 in the line length direction along the track. As a result, the mobile exchange unit 81 moves from the feeder storage device 96 to the third component mounting machine 95. Examples of the driving unit 82 include a ball screw feeding mechanism using a linear motor mechanism or a servo motor. The drive unit 82 is also a power load that operates when the power voltage Vm is supplied.

  The exchange control unit 4 (see FIG. 2) is mounted on the mobile exchange unit 81. The exchange control unit 4 is a control load that operates when supplied with a control voltage Vc described later. The exchange control unit 4 controls the exchange operation of the feeder 89 by controlling the clamp mechanism 85, the operation mechanism 86, and the drive unit 82, which are power loads. The applicant of the present application discloses a detailed configuration example of the mobile switching device 8 in International Publication No. 2014/010083. The non-contact power supply system 1 of the first embodiment is applied to the use of power supply to the mobile exchange unit 81.

2. Configuration of Contactless Power Supply System 1 of First Embodiment FIG. 2 is a block diagram illustrating a functional configuration of the contactless power supply system 1 of the first embodiment. The non-contact power supply system 1 includes a non-contact power transmission device 2 and a non-contact power reception device 3. The non-contact power transmission device 2 is provided in the fixed unit 20. Specifically, a plurality of non-contact power transmission devices 2 are respectively provided in the vicinity of the middle rail 83 of the machine base 99 that is the fixing unit 20 of the plurality of substrate work machines. On the other hand, the non-contact power receiving device 3 is provided in the movable unit 30 that moves relative to the fixed unit 20, specifically, in the movable exchange unit 81. Even if the mobile switching unit 81 moves in the line length direction, the non-contact power receiving device 3 faces one of the non-contact power transmission devices 2.

  The non-contact power transmission device 2 includes a power supply circuit 22 and a power transmission element 25. The power supply circuit 22 supplies power P for non-contact power supply to the power transmission element 25. The power supply circuit 22 includes, for example, a rectifier circuit 23 and a DC / AC conversion circuit 24. The rectifier circuit 23 rectifies the AC voltage of the commercial frequency power supply 21 and outputs a DC voltage. The rectifier circuit 23 is constituted by, for example, a full-wave rectifier circuit in which four diodes are bridge-connected. The DC / AC conversion circuit 24 converts the DC voltage into AC and supplies it to the power transmission element 25. The DC / AC conversion circuit 24 is configured by, for example, a circuit in which four switching elements are bridge-connected. The power transmitting element 25 sends power P (indicated by a white arrow) in a non-contact manner to a power receiving element 31 described later. The power transmission element 25 can be exemplified by a power transmission coil, but is not limited thereto.

  The non-contact power receiving device 3 includes a power receiving element 31, a power receiving circuit 32, and a standby power source 33. When the power receiving element 31 is disposed to face the power transmitting element 25, the power receiving element 31 receives the power P in a non-contact manner. The power receiving element 31 can be exemplified by a power receiving coil that is electromagnetically coupled to the power transmitting coil, and is not limited thereto. In addition, it is preferable to appropriately connect a resonance element (not shown) to the power transmission element 25 or the power reception element 31 and increase the power supply efficiency by using a resonance phenomenon.

  The power receiving circuit 32 receives the power P received by the power receiving element 31 and outputs a control voltage Vc and a power voltage Vm. The control voltage Vc is a DC voltage, for example. The power voltage Vm is a DC voltage higher than the control voltage Vc, for example. The power receiving circuit 32 includes, for example, a rectifier circuit and a direct current dual output circuit. The rectifier circuit rectifies the AC power P received by the power receiving element 31 and outputs a DC voltage to the DC dual output circuit. The direct current dual output circuit adjusts the magnitude of the direct current voltage and outputs the control voltage Vc and the power voltage Vm separately.

  The standby power supply 33 is connected in parallel to the power supply line of the control voltage Vc. The standby power supply 33 compensates for the control voltage Vc when the power P received by the power receiving element 31 decreases or disappears. For example, when a failure occurs in the non-contact power supply and the power receiving circuit 32 cannot output the control voltage Vc, the standby power supply 33 compensates the control voltage Vc over the compensation time. Examples of the standby power supply 33 include a capacitor and a storage battery having a predetermined storage capacity. The compensation time and the storage capacity of the standby power supply 33 are appropriately set so as to ensure the operation time of the safety circuit 41 described later.

  The control voltage Vc is supplied to the exchange control unit 4 that is a control load. The power voltage Vm is supplied to the drive unit 82, the clamp mechanism 85, and the operation mechanism 86, which are power loads. Here, the exchange control unit 4 also functions as the safety circuit 41. Furthermore, the safety circuit 41 includes the function of the power reception decrease determination unit 42. The functions of the safety circuit 41 and the power reception reduction determination unit 42 will be described in detail in the following description of operations and actions.

3. Operation and Action of the Contactless Power Supply System 1 of the First Embodiment As shown in FIG. 2, when the power transmitting element 25 and the power receiving element 31 are arranged to face each other, contactless power supply is performed. Thereby, the power receiving circuit 32 outputs the control voltage Vc and the power voltage Vm, and the mobile exchange device 8 operates. Here, non-contact power supply may be reduced or stopped due to some failure. At this time, the power P received by the power receiving element 31 decreases or disappears, and the control voltage Vc and the power voltage Vm decrease.

  On the other hand, the power reception decrease determination unit 42 holds a predetermined voltage decrease determination value, detects the magnitude of the power voltage Vm at the normal time, and compares it with the voltage decrease determination value. And the power reception fall determination part 42 determines with a power reception fall state by the power voltage Vm having fallen to the voltage fall judgment value. In the power receiving lowered state, the power receiving circuit 32 has already been unable to output the normal power voltage Vm. Similarly, it is assumed that the power receiving circuit 32 has already been unable to output the normal control voltage Vc.

  Nevertheless, the control voltage Vc is ensured by the compensation action of the standby power supply 33. For this reason, the safety circuit 41 operates with the control voltage Vc compensated by the standby power supply 33. And when a power reception fall state is determined, the safety circuit 41 carries out stop control of the power load safely. As an example of safe stop control, when the mobile exchanging unit 81 is moving, the safety circuit 41 performs an emergency braking on the driving unit 82 to interrupt the movement. In addition, when the movable exchange unit 81 is stationary, the safety circuit 41 stops the clamp mechanism 85 and the operation mechanism 86 and interrupts the operation of the feeder 89.

  Trouble is prevented by the safe stop control of the safety circuit 41. Specifically, contact with the worker due to unscheduled movement of the mobile exchange unit 81 is prevented. Further, unintended movement or dropping of the feeder 89 is prevented.

4). Aspects and Effects of Contactless Power Supply System 1 of First Embodiment A contactless power receiving device 3 described in the first embodiment includes a power receiving element 31 that receives power P in a contactless manner, a control voltage Vc that is input with the power P, and The power receiving circuit 32 that outputs the power voltage Vm, the standby power supply 33 that compensates for the control voltage Vc when the power P received by the power receiving element 31 decreases or disappears, and the standby power source when the power P decreases or disappears. A safety circuit 41 that operates with the control voltage Vc compensated by the power supply 33 and that safely stops and controls the power load (drive unit 82, clamp mechanism 85, operation mechanism 86) that operates with the power voltage Vm.

  According to this, when the non-contact power supply is lowered or stopped, and the power P received by the power receiving element 31 is reduced or disappears, the control voltage Vc is secured until the power voltage Vm disappears by the action of the standby power supply 33. Is done. Therefore, the safety circuit 41 can safely stop and control the power load before the control voltage Vc disappears, and can prevent trouble. Further, the standby power supply 33 only needs to compensate for the control voltage Vc, which consumes less power than the power voltage Vm, and therefore requires a small power supply capacity. Therefore, an increase in device cost of the non-contact power receiving device 3 is suppressed.

  In addition, safety circuit 41 includes a power reception decrease determination unit 42 that determines whether power P has decreased or disappeared when power voltage Vm has decreased to a predetermined voltage decrease determination value. According to this, the operation timing of the safety circuit 41 is optimized, and the safety performance is further improved.

  The contactless power feeding system 1 of the first embodiment includes a contactless power receiving device 3, a power transmitting element 25 that supplies power P to the power receiving element 31 in a contactless manner, and a power supply circuit that supplies the power P to the power transmitting element 25. And a non-contact power transmission device 2 including 22.

  According to this, the safety circuit 41 of the non-contact power receiving device 3 can safely stop and control the power load before the control voltage Vc disappears. Furthermore, an increase in the overall cost of the contactless power feeding system 1 is suppressed by suppressing an increase in the device cost of the contactless power receiving device 3.

  Further, the non-contact power transmission device 2 is provided in the fixed unit 20, and the non-contact power reception device 3 is provided in the movable unit 30 that moves relative to the fixed unit 20. According to this, the non-contact electric power feeding system 1 of 1st Embodiment is applied to the electric power feeding to the movable part 30, and the effect which improves safety performance is acquired.

  Moreover, the movable exchange part 81 (movable part 30) is driven by the drive part 82 (power load). According to this, when the power receiving state is lowered, the safety circuit 41 emergency brakes the drive unit 82 to interrupt the movement, so that contact with the worker due to the unscheduled movement of the mobile exchange unit 81 is prevented.

  Further, the fixed unit 20 is a machine base 99 for a substrate work machine that performs a predetermined substrate work, and the movable unit 30 is a mobile exchange that automatically replaces an exchange unit (feeder 89) used for the substrate work. Part 81. According to this, the non-contact electric power feeding system 1 of 1st Embodiment is applied to the component mounting line 9, and the effect which improves safety performance is acquired.

5. Non-contact power feeding system 1A of the second embodiment
Next, the non-contact power feeding system 1A of the second embodiment will be described mainly with respect to differences from the first embodiment. FIG. 3 is a block diagram showing a functional configuration of the contactless power feeding system 1A of the second embodiment. In the contactless power feeding system 1 </ b> A of the second embodiment, the contactless power transmission device 2 </ b> A includes a reception circuit 51 in addition to the power supply circuit 22 and the power transmission element 25. The receiving circuit 51 is driven by the commercial frequency power supply 21 or is driven using a power supply circuit (not shown).

  On the other hand, the non-contact power receiving device 3A includes a transmission circuit 52 in addition to the power receiving element 31, the power receiving circuit 32, the standby power supply 33, and the safety circuit 41. The transmission circuit 52 is driven by the control voltage Vc. When the non-contact power supply is reduced or stopped, the transmission circuit 52 operates with the control voltage Vc compensated by the standby power supply 33. Therefore, the compensation time and the storage capacity of the standby power supply 33 are appropriately set so that the operation time of both the safety circuit 41 and the transmission circuit 52 can be secured. The receiving circuit 51 and the transmitting circuit 52 have a wireless communication function for transmitting information without contact.

  As in the first embodiment, when the power reception reduction state is determined, the safety circuit 41 safely stops and controls the power load (the drive unit 82, the clamp mechanism 85, and the operation mechanism 86). In addition, the safety circuit 41 sends a determination signal S1 to the transmission circuit 52. When receiving the determination signal S <b> 1, the transmission circuit 52 transmits a wireless power reception decrease signal S <b> 2 to the reception circuit 51. When receiving the power reception reduction signal S2, the reception circuit 51 performs predetermined power reception reduction processing.

  For example, the reception circuit 51 performs notification to the operator as the power reception lowering process. Thereby, the power reception lowering state on the movable unit 30 side is notified to the fixed unit 20 side. Therefore, it is easy to grasp the power reception lowering state on the fixing unit 20 side. Further, for example, the reception circuit 51 performs automatic adjustment of the power supply circuit 22 as a process when power reception is reduced. As a result, it is possible to quickly cope with the power reception lowered state.

  Note that the transmission circuit 52 may transmit the power reception status of non-contact power feeding, the progress status of replacing the feeder 89, and the like at a normal time when the power reception is not reduced. Furthermore, an information transmission function in the reverse direction from the reception circuit 51 to the transmission circuit 52 can be used together. For example, an exchange command for the feeder 89 may be transmitted from the reception circuit 51 to the transmission circuit 52.

  The non-contact power receiving device 3A described in the second embodiment operates at the control voltage Vc compensated by the standby power source 33 and transmits the power reception decrease signal S2 when the power P received by the power receiving element 31 decreases or disappears. The transmission circuit 52 is further provided. According to this, the power reception reduced state on the movable part 30 side can be notified, and it becomes easy to cope with the power reception reduced state.

  The contactless power feeding system 1A of the second embodiment includes a contactless power receiving device 3A, a power transmitting element 25 that supplies power P to the power receiving element 31 in a contactless manner, and a power supply circuit 22 that supplies the power P to the power transmitting element 25. And a non-contact power transmission device 2A including a reception circuit 51 that receives the power reception reduction signal S2. According to this, it becomes easy to grasp the power reception lowering state on the movable unit 30 side on the fixed unit 20 side, and it is possible to quickly cope with it.

6). Non-contact electric power feeding system 1B of 3rd Embodiment
Next, the non-contact power feeding system 1B of the third embodiment will be described mainly with respect to differences from the first and second embodiments. FIG. 4 is a block diagram showing a functional configuration of the non-contact power feeding system 1B of the third embodiment. In the non-contact power feeding system 1B of the third embodiment, two systems of non-contact power feeding are performed. Since the reception circuit 51 and the transmission circuit 52 have the same configuration and the same functions as those of the second embodiment, description thereof will be omitted.

  In the third embodiment, the contactless power transmission device 2 </ b> B includes a power supply circuit 22, a first power transmission element 26, a second power transmission element 27, and a reception circuit 51. The power supply circuit 22 supplies the first power P1 for control power to the first power transmission element 26 and also supplies the second power P2 for power supply to the second power transmission element 27. The power supply circuit 22 includes, for example, a rectifier circuit 23 and a DC / AC conversion circuit 24. The DC / AC conversion circuit 24 converts the DC voltage into AC and supplies it to the first power transmission element 26 and the second power transmission element 27.

  In the configuration of the third embodiment, the voltage waveforms supplied to the first power transmission element 26 and the second power transmission element 27 are the same, but are not limited thereto. For example, the power supply circuit 22 includes two sets of DC / AC conversion circuits, and supplies two types of AC voltages having different output frequencies and output voltages to the first power transmission element 26 and the second power transmission element 27. Good.

  The 1st power transmission element 26 supplies 1st electric power P1 (it shows with a white arrow) to the 1st power receiving element 61 mentioned later non-contactingly. Further, the second power transmitting element 27 sends the second power P2 (indicated by a white arrow) to the second power receiving element 62 described later in a non-contact manner. The first power transmission element 26 and the second power transmission element 27 can be exemplified by power transmission coils, but are not limited thereto. The first power transmitting element 26 and the second power transmitting element 27 do not have to have the same structure and the same size. For example, it is preferable that the first power transmission element 26 and the second power transmission element 27 have different specifications corresponding to the two types of AC voltages described above. Further, for example, the first power transmission element 26 for the control power source can be made smaller and lighter than the second power transmission element 27 for the power source.

  On the other hand, the non-contact power receiving device 3B includes a first power receiving element 61, a second power receiving element 62, a first power receiving circuit 63, a second power receiving circuit 67, a standby power supply 33, a safety circuit 45, and a transmission circuit 52. When the first power receiving element 61 is disposed to face the first power transmitting element 26, the first power receiving element 61 receives the first power P1 in a non-contact manner. When the second power receiving element 62 is disposed to face the second power transmitting element 27, the second power receiving element 62 receives the second power P2 in a non-contact manner. The two sets of opposing arrangements described above are realized together at normal times. The first power receiving element 61 and the second power receiving element 62 can be exemplified by power receiving coils, but are not limited thereto.

  The first power receiving circuit 63 receives the first power P1 received by the first power receiving element 61 and outputs the control voltage Vc. The first power receiving circuit 63 includes a rectifier circuit 64 and an output circuit 65. The rectifier circuit 64 rectifies the AC first power P1 received by the first power receiving element 61 and outputs a DC voltage Vdc. The rectifier circuit 64 is constituted by, for example, a full-wave rectifier circuit in which four diodes are bridge-connected. The output circuit 65 receives the DC voltage Vdc and outputs the control voltage Vc. The output circuit 65 is configured by, for example, a DCDC converter that adjusts the DC voltage Vdc and outputs a DC control voltage Vc. The second power receiving circuit 67 receives the second power P2 received by the second power receiving element 62 and outputs the power voltage Vm.

  The standby power supply 33 is connected in parallel to the power supply line of the control voltage Vc. The standby power supply 33 compensates the control voltage Vc over the compensation time when the first power P1 received by the first power receiving element 61 decreases or disappears. Examples of the standby power supply 33 include a capacitor and a storage battery having a predetermined storage capacity. The compensation time and the storage capacity of the standby power supply 33 are set appropriately so that the operation time of the safety circuit 45 and the transmission circuit 52 can be secured.

  In the third embodiment, the exchange control unit 4 also functions as the safety circuit 45. Furthermore, the safety circuit 45 includes the function of the power reception decrease determination unit 46. The power reception decrease determination unit 46 holds a predetermined voltage decrease determination value, detects the magnitude of the DC voltage Vdc of the first power reception circuit 63 during normal times, and compares it with the voltage decrease determination value. Then, the power reception decrease determination unit 46 determines that the first power receiving element 61 is in a power reception decrease state when the DC voltage Vdc has decreased to the voltage decrease determination value. In this reduced power reception state, the rectifier circuit 64 has already been unable to output the normal DC voltage Vdc. It is unclear whether or not the second power receiving element 62 is in a power receiving low state and the second power receiving circuit 67 is unable to output the regular power voltage Vm.

  Nevertheless, at least the control voltage Vc is ensured by the compensation action of the standby power supply 33. For this reason, the safety circuit 45 operates with the control voltage Vc compensated by the standby power supply 33. When the power reception reduction state is determined, the safety circuit 45 safely stops and controls the power load (the drive unit 82, the clamp mechanism 85, and the operation mechanism 86). Trouble is prevented by the safe stop control of the safety circuit 45. Specifically, contact with the worker due to unscheduled movement of the mobile exchange unit 81 is prevented. Further, unintended movement or dropping of the feeder 89 is prevented.

  In the non-contact power receiving device 3B described in the third embodiment, the first power receiving element 61 that receives the first power P1 without contact, the second power receiving element 62 that receives the second power P2 without contact, and the first power P1 are input. The first power receiving circuit 63 that outputs the control voltage Vc, the second power receiving circuit 67 that outputs the power voltage Vm when the second power P2 is input, and the control voltage Vc when the first power P1 decreases or disappears. The auxiliary power supply 33 to be compensated and a safety circuit 45 that safely stops and controls the power load (the drive unit 82, the clamp mechanism 85, and the operation mechanism 86) when the first power P1 decreases or disappears.

  According to this, even in a configuration in which two systems of non-contact power feeding are performed, the control voltage Vc is ensured until the DC voltage Vdc is lowered by the action of the standby power supply 33. Therefore, the safety circuit 45 can safely stop and control the power load before the control voltage Vc disappears, and can prevent trouble. Further, the standby power supply 33 only needs to compensate for the control voltage Vc, which consumes less power than the power voltage Vm, and therefore requires a small power supply capacity. Therefore, an increase in device cost of the non-contact power receiving device 3B is suppressed.

7. Applications and Modifications of Embodiments In the first to third embodiments, the exchange control unit 4 also functions as a safety circuit (41, 45). However, even if the exchange control unit 4 and the safety circuit are separate. Good. The safety circuit may not include the power reception reduction determination unit (42, 46), and may determine the power reception reduction state from the voltage waveforms at both ends of the power reception element 31 and the first power reception element 61. Furthermore, the exchange unit that the mobile exchange device 8 automatically exchanges is not limited to the feeder 89. For example, the mobile exchange device 8 may automatically replace the mounting head and the suction nozzle of the component transfer device of the component mounting machine (93, 94, 95). Various other applications and modifications are possible for the configurations and operations of the first to third embodiments.

  The contactless power supply systems (1, 1A, 1B) of the first to third embodiments are not limited to the component mounting line 9, but are used in a wide range of fields such as power supply to assembly lines of other products, machine tools, and electric vehicles. Is possible.

  DESCRIPTION OF SYMBOLS 1, 1A, 1B: Non-contact electric power feeding system 2, 2A, 2B: Non-contact power transmission apparatus 20: Fixed part 22: Power supply circuit 25: Power transmission element 26: 1st power transmission element 27: 2nd power transmission element 3, 3A, 3B: Non-contact power receiving device 30: movable part 31: power receiving element 32: power receiving circuit 33: standby power supply 4: replacement control unit 41: safety circuit 42: power reception lowering determination unit 51: receiving circuit 52: transmitting circuit 61: first power receiving element 62 : Second power receiving element 63: first power receiving circuit 64: rectifier circuit 65: output circuit 67: second power receiving circuit 8: mobile switching device 81: mobile switching unit 82: driving unit 85: clamp mechanism 86: operating mechanism 89 : Feeder 9: Component mounting line 91: Solder printer 92: Printing inspection machine 93: First component mounting machine 94: Second component mounting Landing machine 95: Third component mounting machine 99: Machine stand P: Electric power P1: First electric power P2: Second electric power Vc: Control voltage Vm: Power voltage Vdc: DC voltage S2: Lower power reception signal

Claims (9)

At least one power receiving element that receives power in a contactless manner;
A power receiving circuit that receives the power and outputs a control voltage and a power voltage;
A reserve power supply that compensates for the control voltage when the power is reduced or lost;
A safety circuit that operates at the control voltage compensated by the standby power source when the power is reduced or disappears, and safely stops and controls a power load that operates at the power voltage;
A non-contact power receiving apparatus.   The non-contact power receiving apparatus according to claim 1, wherein the safety circuit includes a power reception decrease determination unit that determines a decrease or disappearance of the electric power when the power voltage has decreased to a predetermined voltage decrease determination value.   The non-contact power receiving apparatus according to claim 1, further comprising a transmission circuit that operates at the control voltage compensated by the standby power source and transmits a power reception lowering signal when the power is reduced or disappears. The power receiving element includes a first power receiving element that receives the first power without contact, and a second power receiving element that receives the second power without contact,
The power receiving circuit includes a first power receiving circuit that receives the first power and outputs the control voltage, and a second power receiving circuit that receives the second power and outputs the power voltage,
The standby power supply compensates for the control voltage when the first power is reduced or lost,
The safety circuit safely stops and controls the power load when the first power is reduced or disappears.
The non-contact power receiving device according to claim 1. The non-contact power receiving device according to claim 1 or 2,
A non-contact power transmission device including a power transmission element that supplies the power to the power receiving element in a contactless manner, and a power supply circuit that supplies the power to the power transmission element;
A contactless power supply system. The non-contact power receiving device according to claim 3,
A non-contact power transmission device comprising: a power transmission element that supplies the power to the power reception element in a contactless manner; a power supply circuit that supplies the power to the power transmission element; and a reception circuit that receives the power reception reduction signal;
A contactless power supply system. The non-contact power transmission device is provided in a fixed part,
The non-contact power supply system according to claim 5 or 6, wherein the non-contact power receiving device is provided in a movable part that moves relative to the fixed part.   The non-contact power feeding system according to claim 7, wherein the movable part is driven by the power load. The fixing unit is a machine base of a substrate working machine that performs a predetermined substrate working,
The non-contact power feeding system according to claim 7 or 8, wherein the movable part is a mobile exchange part that automatically exchanges an exchange unit used for the substrate work.

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