WO2014038017A1

WO2014038017A1 - Non-contact power supply device

Info

Publication number: WO2014038017A1
Application number: PCT/JP2012/072631
Authority: WO
Inventors: 壮志野村; 直道石浦; 慎二瀧川
Original assignee: 富士機械製造株式会社
Priority date: 2012-09-05
Filing date: 2012-09-05
Publication date: 2014-03-13
Also published as: JPWO2014038017A1; JP6104254B2; CN104604089A; CN104604089B

Abstract

A non-contact power supply device (1) of the present invention comprises: non-contact power supply elements (41, 42) and a high-frequency power supply circuit (5) both provided in a fixed unit (2); and a non-contact power receiving elements (61, 62) and a power receiving circuit (7) both provided in a movable unit (3), said power receiving circuit (7) converting the high-frequency power received by the non-contact power receiving elements (61, 62) and supplying the converted high-frequency power to a power load (L) in the movable unit (3). In the non-contact power supply device (1), the power load (L) selectively consumes or generates power. The non-contact power supply device (1) further comprises: a regeneration reverse-transmission circuit for reversely transmitting regenerative power generated by the power load (L) from the non-contact power receiving elements (61, 62) to the fixed unit (2) via the non-contact power supply elements (41, 42) in a non-contact fashion; and an electricity storage element (52) provided in the fixed unit (2) and storing the reversely transmitted regenerative power. This enables the regenerative power obtained by the power load (L) in the movable unit (3) to be effectively used and the weight and size of the movable unit (3) to be reduced in comparison with conventional techniques.

Description

Non-contact power feeding device

The present invention relates to a non-contact power supply apparatus that supplies power to a power load on a movable part in a non-contact manner from a fixed part, and more particularly to a non-contact power supply apparatus that stores electricity by power regeneration of the power load.

There are solder printing machines, component mounting machines, reflow machines, board inspection machines, etc. as board work equipment that produces boards with a large number of components mounted, and these are connected by a board transport device to build a board production line. There are many cases. Many of these substrate working devices include a movable portion that moves above the substrate and performs a predetermined operation, and a linear motor device or a ball screw feed mechanism can be used as one means for driving the movable portion. A linear motor device generally includes a track member in which N poles and S poles of a plurality of magnets are alternately arranged along a moving direction, and a movable portion configured to include an armature having a core and a coil. Is. In the ball screw mechanism, the ball screw is rotationally driven by a drive motor. In the configuration in which the armature of the linear motor device and the motor for the ball screw mechanism are provided on the movable part, a power supply cable that can be deformed has been conventionally used to supply power to these power loads. In recent years, the application of a non-contact power feeding device has been proposed in order to eliminate adverse effects such as an increase in the carrying weight due to a power feeding cable and a risk of disconnection due to metal fatigue.

Conventionally, the electromagnetic induction method using a coil has been widely used as a method of a non-contact power feeding device, but recently, an electrostatic coupling method in which a capacitor is configured by an opposing electrode plate has been used. In addition, a magnetic resonance method has been studied. In a configuration in which this type of non-contact power feeding device is used to feed power to an armature of a linear motor device or a ball screw mechanism motor on a movable part, an electromotive force is induced in the armature or motor when the movable part is decelerated. Electric power regeneration is possible. However, the conventional technology does not have an appropriate application using the regenerative power, and the regenerative power is wasted as heat loss. The problem of wasting regenerative power is not limited to substrate work equipment, but is included in various equipment using non-contact power feeding.

Patent Documents 1 and 2 disclose technical examples of contactless power supply devices that use regenerative power as a solution to the above-described problems. In the automatic warehouse of Patent Document 1, a charge capacitor is provided in an article conveyance device provided with a drive source driven by non-contact power feeding. Thus, it is described that the regenerative power generated by the drive source is charged to the charge capacitor, and the charged power can be used when the power is required by the article transport device. Further, the non-contact power supply device of Patent Document 2 includes a power receiving circuit that supplies power to a motor in a non-contact manner and a power storage circuit that stores regenerative power of the motor. Thus, it is described that the regenerative power can be effectively used by charging the battery or capacitor of the power storage circuit.

JP 2003-63613 A JP 2005-295680 A

By the way, in Patent Documents 1 and 2, power storage elements such as a battery and a capacitor are provided on the movable part side to be contactlessly fed. For this reason, a movable part becomes heavy by the weight of an electrical storage element, and big power is needed for the drive source on a movable part, and the bad effect which must increase non-contact electric power feeding arises. Further, since the space of the movable part is occupied by the size of the power storage element, there is a problem that hinders mounting of other members. As described above, in the technique of providing the power storage element on the movable part, the weight and size of the power storage element occupy a large ratio with respect to the entire movable part, which is difficult to overlook.

The present invention has been made in view of the problems of the background art described above, and effectively uses the regenerative power obtained by the power load on the movable part that is the target of non-contact power feeding, and the weight and size of the movable part. It is an object to be solved to provide a non-contact power feeding device that suppresses an increase.

The invention of the non-contact power feeding device according to claim 1 that solves the above-described problem includes a non-contact power feeding element provided in a fixed portion, a high-frequency power circuit that feeds high-frequency power to the non-contact power feeding element, and the fixed A non-contact power receiving element that is provided in a movable part that is movably mounted on the part and receives the high frequency power in a non-contact manner, spaced apart from the non-contact power feeding element, and the high frequency received by the non-contact power receiving element A non-contact power feeding device comprising a power receiving circuit that converts power and feeds power to the power load on the movable part, wherein the power load selectively consumes and generates power, and the power load is generated A regenerative reverse circuit that reversely feeds regenerative power from the non-contact power receiving element to the fixed part via the non-contact power feeding element, and the regenerative power that is provided in the fixed part and reversely fed And storing the power negative There further comprises a storage element for feeding a high frequency power to the contactless power supply device in preference to the high frequency power supply circuit when consuming the power.

According to a second aspect of the present invention, in the first aspect, the regenerative reverse circuit is provided in the movable portion in parallel with the power receiving circuit, and converts the regenerative power generated by the power load into a high frequency to perform the contactless operation. A regenerative high-frequency circuit that supplies power to the power receiving element, and a regenerative changeover switch that is provided in the movable portion and connects the power load to one of the power receiving circuit and the regenerative high-frequency circuit.

According to a third aspect of the present invention, in the second aspect, the high-frequency power supply circuit includes a direct-current power source that outputs direct-current power, four switching elements, and a flywheel diode connected in parallel to the switching elements. Including a bridge circuit that converts DC power into the high-frequency power, wherein the storage element is a charge capacitor connected in parallel to the DC power supply, and the regenerative reverse circuit includes the flywheel diode, When a high-frequency regenerative power is sent back from the non-contact power receiving element to the non-contact power feeding element, the switching element is opened and rectified by a full-wave rectifier circuit including the four flywheel diodes. It stores electricity in the charge capacitor.

According to a fourth aspect of the present invention, in the second aspect, the high-frequency power supply circuit includes a secondary battery that outputs DC power, four switching elements, and a flywheel diode connected in parallel to the switching elements. A bridge circuit that converts the DC power into the high-frequency power; the storage element is also used as the secondary battery; and the regenerative reverse circuit includes the flywheel diode; When a high-frequency regenerative power is reversely sent from the power receiving element to the contactless power feeding element, the switching element is opened, and the secondary wave is rectified by a full-wave rectifier circuit including the four flywheel diodes. It stores electricity in the battery.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the power consumption and generation in the power load are selectively controlled, and the high-frequency power circuit and the power supply corresponding to the consumption and generation are controlled. A control circuit for controlling the regenerative reverse circuit is further provided.

The invention according to claim 6 is the invention according to claim 1, wherein the power receiving circuit and the regenerative reverse circuit are
The movable part is provided with four switching elements and a flywheel diode connected in parallel to each of the switching elements, the high frequency power received by the non-contact power receiving element can be converted into DC power, and the power Sharing a regenerative power generated by a load into a high frequency and supplying power to the non-contact power receiving element and a power receiving regenerative selection switch for switching a power feeding direction between the bridge circuit and the power load .

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the contactless power feeding element and the contactless power receiving element are each an electrode plate.

The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the movable part further includes a mounting head that is mounted on a component mounter that mounts a component on a substrate and that performs a component mounting operation. The power load is a linear motor or a ball screw mechanism motor that drives the movable part.

In the invention of the non-contact power feeding device according to claim 1, the regenerative power generated by the power load is fed back in a non-contact manner from the non-contact power receiving element to the fixed part via the non-contact power feeding element by the regenerative reverse feed circuit. The power is stored in the power storage element on the fixed portion side, and the stored power is used in preference to the high frequency power supply circuit. Therefore, the regenerative power can be stored without being wasted as heat loss, and can be effectively used before spontaneous discharge. Furthermore, unlike the prior arts exemplified in Patent Documents 1 and 2, since the power storage element is provided on the fixed part side, the weight and size of the movable part are reduced as compared with the prior art. In addition, an increase in the weight and size of the movable part is suppressed as compared with a configuration in which power regeneration is not performed.

In the invention according to claim 2, the regenerative reverse circuit includes a regenerative high frequency circuit and a regenerative changeover switch provided in parallel with the power receiving circuit. Therefore, when the regenerative power is reversely fed, non-contact power feeding using a high frequency can be performed to increase the regenerative reverse feeding efficiency to the same level as the normal power feeding efficiency, and the regenerative power can be efficiently stored.

In the invention according to claim 3, the charge capacitor can be stored by using the flywheel diode of the high frequency power supply circuit in the regenerative reverse circuit. Accordingly, a dedicated regenerative reverse circuit for transforming regenerative power is not required on the fixed part side, the circuit configuration can be simplified, and an increase in cost required for effective use of regenerative power can be suppressed.

In the invention according to claim 4, the secondary battery can be stored by using the flywheel diode of the high frequency power supply circuit in the regenerative reverse circuit. Therefore, a dedicated regenerative reverse circuit that transforms the regenerative power is not required on the fixed part side, and the circuit configuration can be simplified. In addition, since the storage element is also used as a secondary battery, the regenerative power can be used effectively. The required increase in cost can be remarkably suppressed.

In the invention according to claim 5, the control circuit selectively controls power consumption and generation in the power load, and controls the high frequency power supply circuit and the regenerative reverse circuit in response to the consumption and generation. Therefore, it is possible to control the power transfer direction with high accuracy in accordance with the operation state of the power load, and to realize smooth operation of the power load and high efficiency of power supply efficiency and regenerative reverse transmission efficiency.

In the invention according to claim 6, the power reception circuit and the regenerative reverse transmission circuit share the bridge circuit and the power reception regeneration selection switch in the movable part. Therefore, a dedicated regenerative reverse circuit for transforming regenerative power is not required on the movable part side, the circuit configuration can be simplified, and an increase in cost necessary for effective use of regenerative power can be suppressed.

In the invention according to claim 7, the contactless power feeding element and the contactless power receiving element are each electrode plates, and regenerative power can be sent back from the movable part to the fixed part by an electrostatic coupling method. Therefore, it is possible to apply a combination of high-efficiency power feeding techniques such as using a series resonant circuit, and to realize high efficiency of power regeneration.

In the invention according to claim 8, the movable part is further provided with a mounting head which is mounted on the component mounting machine and performs a component mounting operation. The non-contact power feeding device of the present invention can be installed in a component mounting machine, and can effectively use the regenerative power of a linear motor or a ball screw mechanism motor that drives a movable part.

It is the perspective view which showed the whole structure of the component mounting machine which can apply the non-contact electric power feeder of 1st Embodiment of this invention. FIG. 3 is a circuit diagram schematically illustrating the non-contact power feeding device of the first embodiment and illustrating a power feeding operation. It is a figure explaining reverse transmission operation when electric power load generates regenerative electric power in a 1st embodiment. It is a circuit diagram explaining a non-contact electric supply device of a 2nd embodiment typically. It is a circuit diagram explaining typically the non-contact electric supply device of a 3rd embodiment. It is a circuit diagram explaining the non-contact electric power supply of 4th Embodiment typically. It is a circuit diagram explaining the non-contact electric power feeder of conventional structure typically.

First, a component mounter 10 to which the non-contact power feeding device of the present invention can be applied will be described with reference to FIG. FIG. 1 is a perspective view showing an overall configuration of a component mounting machine 10 to which the non-contact power feeding device 1 according to the first embodiment of the present invention can be applied. The component mounter 10 is a device that mounts a large number of components on a board, and is configured by two sets of component mounting units having the same structure arranged substantially symmetrically. Here, the component mounting unit in a state where the right front cover of FIG. 1 is removed will be described as an example. In the drawing, the width direction of the component mounter 10 from the left back side to the right front side in the figure is the X-axis direction, and the longitudinal direction of the component mounter 10 is the Y-axis direction.

The component mounter 10 is configured by assembling a substrate transport device 110, a component supply device 120, two

component transfer devices

130, 140, and the like on a machine base 190. The board transfer device 110 is disposed so as to cross the vicinity of the center in the longitudinal direction of the component mounting machine 10 in the X-axis direction. The substrate transport device 110 has a transport conveyor (not shown) and transports the substrate in the X-axis direction. Moreover, the board | substrate conveyance apparatus 110 has an unillustrated clamp apparatus, and fixes and hold | maintains a board | substrate in a predetermined mounting operation position. The component supply device 120 is provided at the front portion in the longitudinal direction of the component mounter 10 (left front side in FIG. 1). The component supply device 120 includes a plurality of cassette-type feeders 121, and supplies the components continuously from the carrier tape set in each feeder 121 to the two

component transfer devices

130 and 140.

The two

component transfer devices

130 and 140 are so-called XY robot type devices that can move in the X-axis direction and the Y-axis direction. The two

component transfer apparatuses

130 and 140 are disposed on the front side and the rear side in the longitudinal direction of the component mounter 10 so as to face each other. Each

component transfer device

130, 140 has a linear motor device 150 for movement in the Y-axis direction.

The linear motor device 150 includes a track member 151 and an auxiliary rail 155 common to the two

component transfer devices

130 and 140, and a movable portion 3 for each of the two

component transfer devices

130 and 140. The track member 151 is arranged in parallel on both sides of the movable portion 3 and extends in the Y-axis direction that is the moving direction. A plurality of magnets 152 are arranged in a row along the Y-axis direction on the inner side surfaces of the race member 151 facing each other. The movable part 3 is movably mounted on the track member 151.

The movable part 3 includes a movable main body part 160, an X-axis rail 161, a mounting head 170, and the like. The movable main body 160 extends in the Y-axis direction, and armatures that generate a propulsive force are disposed on opposite sides of the movable main body 160 so as to face the magnets 152 of the track member 151. The X-axis rail 161 extends from the movable main body 160 in the X-axis direction. One end 162 of the X-axis rail 161 is coupled to the movable main body 160 and the other end 163 is movably mounted on the auxiliary rail 155 so that the X-axis rail 161 moves integrally with the movable main body 160 in the Y-axis direction. It has become.

The component mounting head 170 is mounted on the X-axis rail 161 and moves in the X-axis direction. A suction nozzle (not shown) is provided at the lower end of the component mounting head 170. The suction nozzle sucks and collects components from the component supply device 120 using negative pressure and mounts them on the substrate at the mounting work position. A ball screw feed mechanism (not shown) provided on the X-axis rail 161 has an X-axis motor that rotationally drives the ball screw, and drives the component mounting head 170 in the X-axis direction. *

The component mounter 10 further includes a display setting device 180 for exchanging information with an operator, a camera (not shown) that images a board and components, and the like.

In the component mounter 10, the armature of the linear motor device 150 and the X-axis motor of the ball screw feed mechanism always act as a drive source for consuming the power and moving the component mounting head 170. On the other hand, when the component mounting head 170 is decelerated and stopped, an electromotive force is induced in the armature and the X-axis motor to act as a generator that generates regenerative power. Therefore, the armature of the linear motor device 150 and the X-axis motor of the ball screw feed mechanism correspond to the power load L of the present invention that selectively consumes and generates power.

,
Next, the non-contact power feeding device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 is a circuit diagram schematically illustrating the contactless power supply device 1 of the first embodiment and illustrating a power supply operation. Each member of the fixed portion 2 is shown on the left side of FIG. 2, and each member of the movable portion 3 is shown on the right side. Further, a power feeding path is indicated by a broken arrow, a non-contact power feeding direction is indicated by a white arrow RS, and a control flow is indicated by a one-dot chain line arrow.

The non-contact power feeding apparatus 1 normally performs non-contact power feeding from the fixed unit 2 to the power load L on the movable unit 3 and reverses the regenerative power from the movable unit 3 to the fixed unit 2 when the power load L generates regenerative power. And stored in the charge capacitor 52 on the fixed portion 2 side. The non-contact power supply device 1 includes power

supply electrode plates

41 and 42 on the fixed portion 2 side, a high-frequency power supply circuit 5 including a charge capacitor 52, and the like, and power receiving

electrode plates

61 and 62 and a regenerative changeover switch 75 on the movable portion 3 side. The power receiving circuit 7 includes the regenerative high-frequency circuit 8 and the like.

The two power

supply electrode plates

41 and 42 correspond to the non-contact power supply element of the present invention, and are formed of a thin strip of metal material. The two electrode plates for

power supply

41 and 42 are horizontally provided on the fixed portion 2 so that the long side of the belt extends in the moving direction of the movable portion 3, and are parallel to each other while being separated from each other. The lengths of the short sides of the power

supply electrode plates

41 and 42 are appropriately designed according to the magnitude of the power supply power to be supplied.

The high-frequency power supply circuit 5 is disposed in the fixed portion 2 and includes a DC power supply 51, a charge capacitor 52, and a bridge circuit 53. The DC power supply 51 generates a DC power supply voltage from a commercial power supply and supplies power to the bridge circuit 53 from the positive terminal 5P and the negative terminal 5N. The charge capacitor 52 is a large-capacity capacitor, and a plurality of capacitors can be connected in parallel as needed. The charge capacitor 52 has a sufficient capacitance to store regenerative power described later. The charge capacitor 52 has its positive terminal 52P electrically connected to the positive terminal 51P of the DC power supply 51 and its negative terminal 52P electrically connected to the negative terminal 51N of the DC power supply 51. Therefore, the charge capacitor 52 is normally charged with a DC power supply voltage.

The bridge circuit 53 includes four switching elements 541 to 544 and flywheel diodes 551 to 554 connected in parallel to the switching elements 541 to 544. As shown in the figure, the bridge circuit 53 has its positive input terminal 56P electrically connected to the positive terminal 51P of the DC power supply 51, and its negative input terminal 56N electrically connected to the negative terminal 51N of the DC power supply 51. ing.

Between the positive input terminal 56P and the negative input terminal 56N of the bridge circuit 53, the first switching element 541 and the second switching element 542 are connected in series, and the third switching element 543 and the fourth switching element 544 are connected in series. The connections are electrically connected in parallel. One side output terminal 561 between the first switching element 541 and the second switching element 542 is electrically connected to one power supply electrode plate 41, and the other side between the third switching element 543 and the fourth switching element 544. The output terminal 562 is electrically connected to the other power feeding electrode plate 42. The flywheel diodes 551 to 554 suppress overvoltage that tends to occur at the moment when the switching elements 541 to 544 are opened.

The switching elements 541 to 544 are controlled to be opened and closed by the fixed part control circuit 21 provided in the fixed part 2. Specifically, at a certain time, the first and

fourth switching elements

541 and 544 are closed, and the second and

third switching elements

542 and 543 are opened. As a result, one power supply electrode plate 41 is short-circuited to the positive terminal 5P, and the other power supply electrode plate 42 is short-circuited to the negative terminal 5N. At the next time, the first and

fourth switching elements

541 and 544 are opened, and the second and

third switching elements

542 and 543 are closed. As a result, one power feeding electrode plate 41 is short-circuited to the negative terminal 5N, and the other power feeding electrode plate 42 is short-circuited to the positive terminal 5P. Such switching control is frequently performed, and high-frequency power is supplied between the two power

supply electrode plates

41 and 42.

On the other hand, the two power receiving

electrode plates

61 and 62 correspond to the non-contact power receiving element of the present invention, and are formed in a thin and long strip shape of a metal material. The two power receiving

electrode plates

61 and 62 are provided on the movable portion 3, and are respectively opposed to the power

feeding electrode plates

41 and 42 on the fixed portion 2 side. Accordingly, two sets of parallel plate-shaped capacitors are constituted by two sets of opposing electrode plates (41 and 61, 42 and 62), and as shown by a white arrow RS in FIG. Contact power feeding can be performed. One power receiving electrode plate 61 is electrically connected to one side input terminal 731 of the full-wave rectifier circuit 71 of the power receiving circuit 7, and the other power receiving electrode plate 62 is electrically connected to the other side input terminal 732.

The power receiving circuit 7 is disposed in the movable part 3, and is composed of a full-wave rectifier circuit 71, a regeneration changeover switch 75, and a smoothing coil 77. The power receiving circuit 7 rectifies and converts the high frequency power received by the power receiving

electrode plates

61 and 62 and supplies power to the power load L on the movable portion 3. In the first embodiment, since the power load L is a DC load, the full-wave rectifier circuit 71 is used for the conversion of high-frequency power. However, the power load L may be an AC load. In this case, for example, an inverter circuit is used instead of the full-wave rectifier circuit 71.

The full-wave rectifier circuit 71 is configured by bridge-connecting four diode elements 721 to 724. More specifically, as shown in the figure, the series connection of the first diode element 721 and the second diode element 722 and the series connection of the third diode element 723 and the fourth diode element 724 are negatively connected to the positive output terminal 74P. A side output terminal 74N is electrically connected in parallel. One side input terminal 731 between the first diode element 721 and the second diode element 722 is electrically connected to one power receiving electrode plate 61, and the other side between the third diode element 723 and the fourth diode element 724. The input terminal 732 is electrically connected to the other power receiving electrode plate 62. The positive output terminal 74P is electrically connected to the power supply side contact 761 of the regeneration changeover switch 75, and the negative output terminal 74N is electrically connected to the negative terminal LN of the power load L.

The regenerative changeover switch 75 is a switch for selectively changing one of the full-wave rectifier circuit 71 and the regenerative high-frequency circuit 8. The regenerative changeover switch 75 conducts one of the power supply side contact 761 and the regenerative side contact 762 to the common contact 763. The power supply side contact 761 is electrically connected to the positive output terminal 74P of the full wave rectifier circuit 71, and the regeneration side contact 762 is electrically connected to the anode 82A of the reverse feed diode 81 of the regenerative high frequency circuit 8. The common contact 763 is electrically connected to one side terminal 781 of the smoothing coil 77.

The movable part control circuit 31 provided in the movable part 3 controls the switching operation of the regenerative changeover switch 75 and makes the power supply side contact 761 conductive to the common contact 763 when supplying power to the power load L. Further, when the regenerative power generated by the power load L is sent back, the movable part control circuit 31 causes the regenerative contact 762 of the regenerative changeover switch 75 to conduct to the common contact 763.

The smoothing coil 77 smoothes the pulsating portion of the DC power output from the full-wave rectifier circuit 71. One terminal 782 of the smoothing coil 77 is electrically connected to the common contact 76 of the regeneration changeover switch 75, and the other terminal 782 is electrically connected to the positive terminal LP of the power load. The smoothing coil 77 is a simple example of a smoothing circuit, and another known smoothing circuit may be used.

The regenerative high-frequency circuit 8 is provided in parallel with the full-wave rectifier circuit 71 on the movable part 3. The regenerative high-frequency circuit 8 converts the regenerative power generated by the power load L into a high frequency and supplies power to the non-contact

power receiving elements

61 and 62. The regenerative high-frequency circuit 8 includes a reverse-feeding diode 81 and a reverse-feeding bridge circuit 83 including four switching elements 851 to 854.

The anode 82A of the reverse feed diode 81 is electrically connected to the regeneration side contact 762 of the regeneration changeover switch 75, and the cathode 82K is electrically connected to the positive side input terminal 84P of the reverse feed bridge circuit 83. The reverse feed diode 81 allows energization in the direction (reverse feed direction) from the power load L toward the non-contact

power receiving elements

61 and 62 and prevents energization in the opposite direction.

The positive input terminal 84P of the reverse bridge circuit 83 is electrically connected to the reverse diode 81, and the negative input terminal 84N is electrically connected to the negative terminal LN of the power load L. As illustrated, between the positive input terminal 84P and the negative input terminal 84N, a first switching element 851 and a second switching element 852 are connected in series, and a third switching element 853 and a fourth switching element 854 are connected. Are connected in parallel with each other. One side output terminal 861 between first switching element 851 and second switching element 852 is electrically connected to one power receiving electrode plate 61, and the other side between third switching element 853 and fourth switching element 854. The output terminal 862 is electrically connected to the other power receiving electrode plate 62.

The switching elements 851 to 854 are controlled to be opened and closed by the movable part control circuit 31. A specific control method of the reverse feed bridge circuit 83 is similar to the bridge circuit 53 on the fixed portion 2 side, and thus the description thereof will be omitted. However, the switching control is frequently performed and the two power receiving

electrode plates

61 and 62 are used. During this period, high-frequency power is transmitted backward.

The fixed part control circuit 21 on the fixed part 2 side and the movable part control circuit 31 on the movable part 3 side can be configured by a computer control circuit that incorporates a microcomputer and operates by software. A non-contact transmission unit 22 is attached to the fixed unit control circuit 21, and a non-contact reception unit 32 is attached to the movable unit control circuit 31. As a communication method between the contactless transmission unit 22 and the contactless reception unit 32, an optical wireless method or a radio wave wireless method can be used.

The fixed part control circuit 21 and the movable part control circuit 31 cooperate with each other, and the fixed part control circuit 21 is configured to perform the position control of the mounting head 170 by driving the power load L with an initiative. Therefore, the fixed part control circuit 21 transmits a switching control signal Ctl1 for switching control between power supply to the power load L and reverse transmission of regenerative power from the power load L to the movable part control circuit 31 in a non-contact manner. Based on this switching control signal Ctl1, the movable part control circuit 31 commands the power load L to receive an operation command Ctl2.

In addition, between the fixed part control circuit 21 and the movable part control circuit 31 does not necessarily need to be non-contact communication, and wired communication can also be used. Moreover, you may employ | adopt the bidirectional | two-way communication which transmits information, such as the operating condition of the electric power load L, the magnitude | size of electric power feeding, and regenerative power, from the movable part control circuit 31 to the fixed part control circuit 21.

Next, the operation of the non-contact power feeding device 1 according to the first embodiment configured as described above will be described. First, the normal power supply operation will be described, and then the reverse operation when the power load L generates regenerative power will be described.

In the normal power feeding operation, power is supplied from the DC power source 51 to the power load L as indicated by broken arrows F1 to F4 and white arrows RS in FIG. First, the fixed part control circuit 21 transmits a switching control signal Ctl1 for supplying power to the power load L to the movable part control circuit 31 via non-contact communication. The movable part control circuit 31 commands an operation command Ctl2 to supply power to the power load L. In addition, the movable part control circuit 31 causes the power supply side contact 761 of the regenerative changeover switch 75 to conduct to the common contact 763, and further controls all the four switching elements 851 to 854 of the reverse feed bridge circuit 83 to the open circuit state.

On the other hand, the fixed part control circuit 21 controls the operation of the bridge circuit 53 to a general full bridge circuit, that is, performs switching control of the four switching elements 541 to 544 to generate high-frequency power. At this time, the frequency of the high-frequency power is controlled so that the entire circuit from the DC power source 51 to the power load L is in series resonance, thereby increasing the power supply efficiency. Since the resonance frequency at the time of electric power supply changes according to the load condition of the electric power load L, it is preferable to variably control the frequency.

With the above control, as indicated by arrows F1 and F4 in FIG. 2, the DC power of the DC power supply 51 is converted into high-frequency power by the bridge circuit 53 and is sent to the two power

supply electrode plates

41 and 42. The The two power

supply electrode plates

41 and 42 and the two power

reception electrode plates

61 and 62 are electrostatically coupled as described above, and are non-electrostatically coupled as indicated by the white arrow RS. Contact power feeding is performed. The high frequency power received by the power receiving

electrode plates

61 and 62 is converted into DC power by the power receiving circuit 7 and fed to the power load L as indicated by arrows F2 and F3.

Next, FIG. 3 is a diagram for explaining a reverse operation when the power load L generates regenerative power in the first embodiment. In the reverse operation, the regenerative power is reversely transmitted from the power load L to the charge capacitor 52 as indicated by broken arrows F5 to F8 and white arrows RR in FIG. First, the fixed part control circuit 21 controls all the four switching elements 541 to 544 of the bridge circuit 53 to the open circuit state. Furthermore, the fixed part control circuit 21 transmits a switching control signal Ctl1 indicating that the regenerative power is sent back to the movable part control circuit 31 via non-contact communication.

On the other hand, the movable part control circuit 31 commands the operation command Ctl2 to reversely send the regenerative power to the power load L. In addition, the movable part control circuit 31 causes the regeneration side contact 762 of the regeneration changeover switch 75 to conduct to the common contact 763. Further, the movable part control circuit 31 controls the four switching elements 851 to 854 of the reverse feed bridge circuit 83 to operate as a full bridge circuit, and generates high frequency power. At this time, the frequency of the high-frequency power is variably controlled so that the entire circuit from the power load L to the charge capacitor 52 is in series resonance, thereby improving the regeneration efficiency. In addition, the resonance frequency at the time of electric power regeneration changes according to the regeneration implementation condition of the electric power load L, and may differ from the resonance frequency at the time of electric power feeding.

With the above control, as indicated by arrows F5 and F8 in FIG. 3, the regenerative power generated by the power load L is input to the regenerative high-frequency circuit 8, and is converted into high-frequency power to be two power receiving

electrode plates

61, 62 is sent back. Further, non-contact power reverse transmission is performed by the electrostatic coupling method as indicated by the white arrow RR. The high frequency regenerative power received by the power

supply electrode plates

61 and 62 is input to the one side output terminal 561 and the other side output terminal 562 of the bridge circuit 53.

Here, since the four switching elements 541 to 544 are opened, the bridge circuit 53 acts as a full-wave rectifier circuit including four flywheel diodes 551 to 554. Therefore, reverse DC power is output between the positive side input terminal 56P and the negative side input terminal 56N of the bridge circuit 53 in the direction opposite to the normal direction. Since the reverse DC voltage of the reverse DC power can be higher than the DC power supply voltage of the DC power supply 51, the charge capacitor 52 is charged with more charge than usual.

As a result, the charging voltage between the positive terminal 52P and the negative terminal 52N of the charge capacitor 52 rises above the normal DC power supply voltage. The amount of charge that is charged more than usual is used in preference to the DC power source 51 when the power load L is next fed. Therefore, the charge that is preferentially used contributes to the power regeneration, and the total efficiency of the non-contact power feeding device 1 is improved by this amount.

In the first embodiment, a circuit range in which regenerative power is fed back from the power load L to the charge capacitor 52 is a regenerative reverse circuit. Therefore, the regenerative reverse circuit includes four smoothing coils 77 and a regenerative changeover switch 75 of the power receiving circuit 7, a regenerative high frequency circuit 8, power receiving

electrode plates

61 and 62, power

feeding electrode plates

41 and 42, and a bridge circuit 53. The flywheel diodes 551 to 554 are configured.

Next, the effect of the contactless power supply device 1 of the first embodiment will be described in comparison with the conventional configuration. FIG. 7 is a circuit diagram schematically illustrating the conventional contactless power supply device 9. In the conventional contactless power supply device 9, the high frequency power supply circuit 5 X that supplies high frequency power to the power

supply electrode plates

41 and 42 on the fixed portion 2 X side does not include the charge capacitor 52, and regenerates on the movable portion 3 X side. Without the changeover switch 75 and the regenerative high-frequency circuit 8, the power receiving circuit 7X is configured by directly connecting a smoothing coil 77 to a full-wave rectifier circuit 71. Instead, the charge capacitor 52X is electrically connected between the positive terminal LP and the negative terminal LN of the power load L.

The charge capacitor 52X is normally charged to a certain charging voltage by non-contact power feeding. When the power load L generates regenerative power to generate a regenerative voltage, and the regenerative voltage exceeds the charging voltage, the charge is directly charged from the power load L to the charge capacitor 52X as indicated by arrows F9 and F10. Is done. In the conventional configuration and the first embodiment, the arrangement positions of the

charge capacitors

52X and 52 are different, but the

charge capacitors

52X and 52 are charged at a higher voltage than usual during regeneration.

As can be seen from a comparison between FIG. 7 and FIG. 2, in the first embodiment, the charge capacitor 52 X is not provided on the movable portion 3 side, and a regenerative changeover switch 75 and a regenerative high-frequency circuit 8 are provided instead. Here, in order to effectively use the regenerative power of the power load L, the charge capacitor 52X having a conventional configuration has a considerably large capacity and occupies a large proportion of weight and size with respect to the entire movable portion 3X. The conventional charge capacitor 52X is heavier and larger than the sum of the regenerative changeover switch 75 and the regenerative high frequency circuit 8. Therefore, the movable part 3 of the contactless power supply device 1 of the first embodiment can be made smaller and lighter than the movable part 3X of the contactless power supply device 9 of the conventional configuration.

According to the non-contact power feeding device 1 of the first embodiment, the regenerative power generated by the power load L is received from the power receiving

electrode plates

61 and 62 by the regenerative reverse circuit via the power

feeding electrode plates

41 and 42 and the fixed portion 2. The non-contact reversely sent and stored in the charge capacitor 52 on the fixed portion 2 side, and the stored power is used in preference to the DC power supply 51. Therefore, the regenerative power can be stored without being wasted as heat loss, and can be effectively used before spontaneous discharge. Further, unlike the contactless power supply device 9 of the conventional configuration, the charge capacitor 52 is provided on the fixed portion 2 side, so that the weight and size of the movable portion 3 are reduced compared to the movable portion 3X of the conventional configuration. Furthermore, an increase in the weight and size of the movable part 3 is suppressed compared to a configuration that does not perform power regeneration.

In addition, the non-contact power feeding element and the non-contact power receiving element are

electrode plates

41, 42, 61, 62, respectively, and regenerative power can be sent back from the movable part 3 to the fixed part 2 by electrostatic coupling. The transmission circuit includes a regenerative high-frequency circuit 8 and a regenerative changeover switch 75 provided in parallel with the power receiving circuit 7. Therefore, even when the regenerative power is reversely transmitted, the regenerative reverse transmission efficiency can be increased to the same level as the normal power supply efficiency by using the high-frequency series resonance circuit, and the regenerative power can be efficiently stored.

Furthermore, the charge capacitor 52 can be stored using the flywheel diodes 531 to 534 of the high-frequency power supply circuit 5 in the regenerative reverse circuit. Accordingly, a dedicated regenerative reverse circuit for transforming regenerative power is not required on the fixed portion 2 side, the circuit configuration can be simplified, and an increase in cost required for effective use of regenerative power can be suppressed.

Furthermore, the fixed part control circuit 21 and the movable part control circuit 31 cooperate to selectively control the consumption and generation of power in the power load L, and the high frequency power supply circuit 5 and the regenerative high frequency circuit 8 corresponding to the consumption and generation. To control. Therefore, the power transfer direction can be controlled with high accuracy in accordance with the operating state of the power load L, and smooth operation of the power load L and higher efficiency of power supply efficiency and regenerative reverse transmission efficiency can be realized.

Next, the non-contact power feeding device 1A of the second embodiment in which the configuration of the high-frequency power supply circuit 5A on the fixed portion 2A side is different will be described mainly with reference to FIG. 4 and different points from the first embodiment. FIG. 4 is a circuit diagram schematically illustrating the contactless power feeding device 1A of the second embodiment. In the second embodiment, the high frequency power supply circuit 5 A of the fixed portion 2 A has a battery 51 A instead of the DC power supply 51 and the charge capacitor 52. The battery 51A is a secondary battery that can be repeatedly charged and discharged, and also serves as a power storage element. In other words, the battery 51A stores the regenerative power that is sent back from the movable portion 3 to the fixed portion 2A.

According to the non-contact power feeding device 1A of the second embodiment, since the storage element is also used as the battery 51A, it is possible to remarkably suppress an increase in cost necessary for effective use of regenerative power. Since the configurations and operations of other parts of the second embodiment and the effects other than those described above are the same as those of the first embodiment, description thereof will be omitted.

Next, with respect to the non-contact power feeding device 1B of the third embodiment in which the regenerative high frequency circuit is incorporated in the power receiving circuit 7B on the movable part 3B side, the points different from the first and second embodiments are described with reference to FIG. Mainly explained. FIG. 5 is a circuit diagram schematically illustrating the non-contact power feeding device 1B of the third embodiment. In the third embodiment, the power reception circuit 7B includes a bridge circuit 79, a power reception regeneration selection switch 75B, and a smoothing coil 77.

The bridge circuit 79 is the same circuit as the bridge circuit 53 of the fixed unit 2, and includes four switching elements and a flywheel diode connected in parallel to each switching element. As shown in the figure, one input terminal 791 of the bridge circuit 79 is electrically connected to one power receiving electrode plate 61, and the other input terminal 792 is electrically connected to the other power feeding electrode plate 62. The positive output terminal 79P of the bridge circuit 79 is electrically connected to the changeover switch 75B, and the negative output terminal 79N is electrically connected to the negative terminal LN of the power load L. The four switching elements of the bridge circuit 79 are controlled by the movable part control circuit 31, all are opened during power feeding, and switching controlled during regeneration.

The power reception regeneration selection switch 75B is a switch that selectively switches between power feeding and regeneration. The power reception / regeneration selection switch 75B conducts one of the power supply side contact 761 and the regeneration side contact 762 to the common contact 763. The power feeding side contact 761 is directly electrically connected to the positive output terminal 79P of the bridge circuit 79, and the regeneration side contact 762 is electrically connected to the positive output terminal 79P via the reverse feed diode 764. The reverse feed diode 764 allows energization in the direction (reverse feed direction) from the power load L toward the non-contact

power receiving elements

61 and 62 and prevents energization in the opposite direction. When power is supplied to the power load L, the movable part control circuit 31 connects the power supply side contact 761 of the power reception regeneration selection switch 75B to the common contact 763, and when the regenerative power generated by the power load L is sent back, the regenerative side contact. 762 is connected to the common contact 763.

In the non-contact power feeding device 1B of the third embodiment, the bridge circuit 79 acts as a full-wave rectifier circuit during power feeding and acts as a regenerative high-frequency circuit during regeneration. Therefore, the non-contact power feeding device 1B of the third embodiment operates in the same manner as the first embodiment, and the same effect as the first embodiment occurs. In addition, as can be seen by comparing FIG. 5 with FIG. 2, in the third embodiment, a dedicated regenerative reverse circuit becomes unnecessary on the movable part 3B side, the circuit configuration can be simplified, and effective use of regenerative power is possible. The increase in cost required for the process can be suppressed.

Next, the non-contact power feeding device 1C of the fourth embodiment in which the non-contact power feeding element and the non-contact power receiving element are different will be described mainly with reference to FIG. 6 and differences from the first embodiment. FIG. 6 is a circuit diagram schematically illustrating the contactless power feeding device 1C of the fourth embodiment. In the fourth embodiment, a power feeding coil 43 is used as a non-contact power feeding element of the fixed portion 2C, and a power receiving coil 63 is used as a non-contact power receiving element of the movable portion 3C. The power supply coil 43 and the power reception coil 63 are electromagnetically coupled well, and are configured to perform non-contact power supply by an electromagnetic induction method. Other parts are the same as those in the first embodiment, and a description thereof will be omitted.

According to the non-contact power feeding device 1C of the fourth embodiment, the regenerative power generated by the non-contact power load L by the electromagnetic induction method using the power feeding coil 43 and the power receiving coil 63 is reversely transmitted, and the fixed portion 2C side Can be stored. As a result, the overall efficiency of electromagnetic induction type non-contact power feeding can be increased. The power feeding coil 43 and the power receiving coil 63 can also be used in combination with the second and third embodiments.

Note that the present invention is not limited to the non-contact power feeding device of the electrostatic coupling method and the electromagnetic coupling method, and can be implemented by another non-contact power feeding method such as a magnetic field resonance method. In addition, the circuit configurations of the high-frequency

power supply circuits

5, 5A, the

power receiving circuits

7, 7B, the regenerative high-frequency circuit 8, and the like can be modified as appropriate. Various other applications and modifications are possible for the present invention.

The non-contact power feeding device of the present invention can be used for a component mounting machine, and can also be used for other board work equipment such as a board inspection machine. Furthermore, the non-contact power feeding device of the present invention can be used for various devices having a power load capable of regenerating power other than the linear motor device and the ball screw feeding mechanism in the movable portion.

DESCRIPTION OF

SYMBOLS

1, 1A, 1B, 1C: Non-contact electric power feeder 2, 2A, 2C: Fixed part 21; Fixed part control circuit 3, 3B, 3C: Movable part 31: Movable part control circuit 41, 42: Electrode plate for electric power feeding (non- Contact power supply element)
43: Coil for power feeding (element for non-contact power feeding)
5, 5A: High frequency power supply circuit 51: DC power supply 51A: Battery (secondary battery) 52: Charge capacitor (storage element)
53: Bridge circuit 541-544: Switching element 551-554: Flywheel diode 61, 62: Electrode plate for power reception (non-contact power reception element)
63: Power receiving coil (non-contact power receiving element)
7, 7B: Power receiving circuit 71: Full wave rectifier circuit 721 to 724: Diode element 75: Regenerative changeover switch 75B: Power receiving regenerative selection switch 764: Reverse feed diode 77: Smoothing coil 79: Bridge circuit 8: Regenerative high frequency circuit 81: Reverse Sending diode 83: Reverse feeding bridge circuit 851 to 854: Switching element 9: Conventional non-contact power feeding device 10: Component mounting machine 110: Board transfer device 120: Component feeding device 130, 140: Component transfer device 150: Linear motor Device 160: Movable main body 161: X-axis rail 170: Mounting head 180: Display setting device 190: Machine base L: Power load

Claims

A non-contact power supply element provided in the fixed portion;
A high-frequency power supply circuit for supplying high-frequency power to the contactless power supply element;
A non-contact power receiving element that is provided in a movable part that is movably mounted on the fixed part, and that receives the high-frequency power in a non-contact manner, spaced apart from the non-contact power feeding element;
A non-contact power feeding device comprising: a power receiving circuit that converts high-frequency power received by the non-contact power receiving element and feeds power to the power load on the movable part;
The power load selectively performs power consumption and generation,
A regenerative reverse circuit that reversely transmits the regenerative power generated by the power load from the contactless power receiving element to the fixed part via the contactless power feeding element; and
The regenerative power that is provided in the fixed portion and stored in reverse is stored, and when the power load consumes the power, the high-frequency power is supplied to the contactless power supply element in preference to the high-frequency power supply circuit. A non-contact power feeding device further comprising:
The regenerative reverse circuit according to claim 1,
A regenerative high-frequency circuit that is provided in parallel with the power reception circuit in the movable part, converts the regenerative power generated by the power load into a high frequency and feeds the non-contact power reception element, and
A non-contact power feeding device configured to include a regenerative changeover switch that is provided in the movable portion and connects the power load to one of the power receiving circuit and the regenerative high frequency circuit.
In claim 2,
The high-frequency power circuit includes a DC power source that outputs DC power, and a bridge circuit that includes four switching elements and a flywheel diode connected in parallel to each of the switching elements and converts the DC power to the high-frequency power. ,
The power storage element is a charge capacitor connected in parallel to the DC power source,
The regenerative reverse circuit is configured to include the flywheel diode, and when the high frequency regenerative power is reversely transmitted from the non-contact power receiving element to the non-contact power supply element, the switching element is opened. A non-contact power feeding device that rectifies by a full-wave rectifier circuit composed of the four flywheel diodes and stores the charge in the charge capacitor.
In claim 2,
The high-frequency power circuit includes a secondary battery that outputs DC power, and a bridge circuit that includes four switching elements and a flywheel diode connected in parallel to each of the switching elements, and converts the DC power into the high-frequency power. Including
The power storage element is also used in the secondary battery,
The regenerative reverse circuit is configured to include the flywheel diode, and when the high frequency regenerative power is reversely transmitted from the non-contact power receiving element to the non-contact power supply element, the switching element is opened. A non-contact power feeding device that rectifies by a full-wave rectifier circuit including the four flywheel diodes and stores the secondary battery.
5. The control according to claim 1, wherein the power consumption and generation in the power load are selectively controlled, and the high-frequency power supply circuit and the regenerative reverse circuit are controlled in response to the consumption and generation. A contactless power supply device further comprising a circuit.
In Claim 1, the power reception circuit and the regenerative reverse transmission circuit,
The movable part is provided with four switching elements and a flywheel diode connected in parallel to each of the switching elements, the high frequency power received by the non-contact power receiving element can be converted into DC power, and the power A bridge circuit capable of converting the regenerative power generated by the load into a high frequency and supplying power to the contactless power receiving element;
A non-contact power feeding apparatus that shares a power reception regeneration selection switch that switches a power feeding direction between the bridge circuit and the power load.
The contactless power feeding device according to any one of claims 1 to 6, wherein each of the contactless power feeding element and the contactless power receiving element is an electrode plate.
In any one of claims 1 to 7,
The movable part further includes a mounting head that is mounted on a component mounting machine that mounts a component on a substrate and performs a component mounting operation.
The non-contact power feeding device, wherein the power load is a linear motor or a ball screw mechanism motor that drives the movable part.