JP2009182116A - Component supply device and its power supply method, and mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably supply a component while a small transformer is adopted by preventing fluctuation of transmission efficiency due to fluctuation of a gap g of the transformer M for electromagnetic induction coupling. <P>SOLUTION: The prescribed gap g is formed between confronted faces of a first magnetic core F1 and a second magnetic core F2. A frequency of a drive signal of an oscillation drive means OC is set in accordance with a resonance frequency f0 of an LC resonance circuit consisting of a leakage inductance Lr by the gap g of the transformer M and a capacitor C1 serial to a primary coil. Leakage inductance Lr is positively and effectively used for a structure of the resonance circuit. Maximum current is made to flow on a primary coil-side of the transformer M in a resonance state. Energy loss during transmission based on an electromagnetic induction coupling operation by the transformer M is reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a component supply device, a power supply method, and a mounter that are supplied with power by a power supply device applied to a mounter that supplies components to a substrate.

  In a mounting machine that mounts electronic components on a substrate, electronic components are automatically supplied by a component supply device such as a tape feeder.

  As a method of supplying driving power to the component supply device from the mounting machine main body side, instead of connecting means such as a connector, recently, the power feeding unit side and the power receiving unit side are not connected using an electromagnetic inductive coupling transformer. A technique for joining with a contact structure has been proposed (see Patent Document 1 below).

Further, in such an electromagnetic induction coupling transformer, electromagnetic induction generated from a leakage magnetic flux caused by a gap between the first magnetic core wound with the primary coil and the second magnetic core wound with the secondary coil. In order to suppress energy loss upon coupling, a configuration in which the gap between both cores is made as small as possible has been proposed (see Patent Document 2 below).
Japanese Patent Laid-Open No. 9-307283 JP 2006-191098 A

  However, it is difficult to ensure the gap between the first magnetic core and the second magnetic core with high reproducibility each time the component supply device is mounted on the mounting machine body, and a small gap is assumed. There is a possibility that high transmission efficiency from the power feeding unit side to the power receiving unit side cannot be guaranteed due to a slight gap variation.

  For this reason, in order to secure a necessary power supply amount even if the transmission efficiency is lowered due to the gap variation, it is necessary to introduce a large-sized electromagnetic induction coupling transformer.

  The present invention has been made in view of the above circumstances, and by suppressing fluctuations in transmission efficiency due to gap fluctuations, it is possible to realize a stable component supply while enabling the adoption of a small electromagnetic induction coupling transformer. It is an object to provide a component supply device and a mounting machine that can be used.

  The above problem is solved by the following means.

[1] A power feeding unit provided on the mounting machine main body side and a power receiving unit provided on the component supply device side of the mounting machine for supplying power to the component supply driving load are connected via an electromagnetic inductive coupling transformer. In a component supply device powered by a separably coupled power supply device,
The power feeding unit is
Oscillation drive means for generating a drive signal with a predetermined frequency;
Switching means for performing ON / OFF operation according to the frequency of the drive signal of the oscillation drive means and applying a voltage of a predetermined frequency to a primary coil wound around the first magnetic core in the transformer;
A capacitor connected in series to the ground terminal of the primary coil of the transformer,
The power receiving unit
DC means for rectifying an AC voltage induced in a secondary coil wound around the second magnetic core of the transformer and outputting a predetermined DC voltage;
A predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer in a state where the component supply device is mounted on the mounting machine body,
The frequency of the drive signal by the oscillation drive means is set according to the resonance frequency of an LC resonance circuit composed of a leakage inductance due to the gap of the transformer and the capacitor.

  [2] The preceding item 1 comprising positioning means for positioning the mounting position of the component supply device with respect to the mounting machine body so that a predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core. The component supply apparatus described in 1.

[3] Voltage detection means for detecting an output voltage of the direct current means;
Feedback means for sending a detection signal corresponding to the output of the voltage detection means to the oscillation drive means,
The oscillation drive means receives a detection signal from the feedback means when the component supply drive load becomes smaller and the output voltage of the DC conversion means rises above a predetermined voltage, and is higher than the resonance frequency. 3. The component supply apparatus according to item 1 or 2, which is set to output a drive signal having a frequency shifted to.

[4] A power feeding unit provided on the mounting machine main body side and a power receiving unit provided on the component supply device side for supplying power to the component supply driving load can be separated via an electromagnetic inductive coupling transformer. A mounting machine having a combined power supply device,
The power feeding unit is
Oscillation drive means for generating a drive signal with a predetermined frequency;
Switching means for performing ON / OFF operation according to the frequency of the drive signal of the oscillation drive means and applying a voltage of a predetermined frequency to a primary coil wound around the first magnetic core in the transformer;
A capacitor connected in series to the ground terminal of the primary coil of the transformer,
The power receiving unit
DC means for rectifying an AC voltage induced in a secondary coil wound around the second magnetic core of the transformer and outputting a predetermined DC voltage;
A predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer,
The frequency of the drive signal by the oscillation drive means is set according to the resonance frequency of the LC resonance circuit composed of the leakage inductance due to the gap of the transformer and the capacitor.

[5] A power feeding unit provided on the mounting machine main body side and a power receiving unit provided on the component supply device side of the mounting machine for supplying power to the component supply driving load are connected via an electromagnetic inductive coupling transformer. In a mounting machine that is separably coupled, a power supply method for supplying power to a component supply device,
The switching unit is turned ON / OFF according to the frequency of the drive signal generated by the oscillation drive unit in the power feeding unit, and a voltage having a predetermined frequency is applied to the primary coil of the transformer. While rectifying and smoothing the AC voltage induced in the secondary coil to output a predetermined DC voltage,
A leakage inductance due to a predetermined gap formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer in a state where the component supply device is mounted on the mounting machine body, and a primary coil of the transformer A power supply method for a component supply apparatus, wherein a frequency of a drive signal by the oscillation drive means is set according to a resonance frequency of an LC resonance circuit constituted by a capacitor connected in series to a ground terminal of the component.

  According to the inventions described in [1], [4], and [5], in the electromagnetic induction coupling transformer that transmits electric power from the mounting machine body side to the component supply device, the first magnetic core and the second magnetic core A predetermined gap is formed between the opposing surfaces of the mounting machine body with the component supply device mounted thereon, and the frequency of the drive signal by the oscillation drive means is determined by the leakage inductance and the capacitor due to the gap of the transformer. Since it is set according to the resonance frequency of the LC resonance circuit to be configured, the leakage inductance appearing on the primary coil side of the transformer and the capacitance of the capacitor are actively used for the configuration of the resonance circuit, so that the transformer in the resonance state is used. High power supply efficiency by flowing the maximum current to the primary coil side and reducing energy loss during transmission based on the electromagnetic inductive coupling action by the transformer It can be realized.

  In addition, since the presence of a predetermined gap between the cores of the transformer is used, it is possible to suppress a change in transmission efficiency due to a gap change, and it is not necessary to separately introduce a means for reducing the gap as much as possible. Stable component supply can be realized while adopting a small electromagnetic inductive coupling transformer.

  According to the invention described in [2] above, since the positioning means for positioning the mounting position of the component supply device with respect to the mounting machine body is provided, the predetermined gap in the transformer can be formed easily and stably.

According to the invention described in [3], the oscillation drive means detects the detection signal from the feedback means when the drive load in the component supply device becomes small and the output voltage of the direct current conversion means rises above a predetermined voltage. Is set to output a drive signal with a frequency shifted higher than the resonance frequency.
When the driving load in the component supply device is small, the current flowing through the primary coil of the transformer can be reduced below the maximum current, and the reactive current can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing a mounting machine to which a component supply device to which power is supplied by a power supply device according to a first embodiment of the present invention is applied.

  In FIG. 1, this mounting machine 10 is provided on a base 11 and conveys a printed circuit board W, a component 2 provided on both sides of the conveyor 2 and constituting a supply device mounting unit, And a head unit 4 provided above the conveyor 2.

  A plurality of tape feeders 31 as component supply devices are detachably mounted in the component supply unit 3 in a parallel arrangement. As will be described later, a component storage tape (reel tape) in which electronic components are stored at predetermined intervals is wound and set on the tape feeder 31, and the electronic components stored in the component storage tape are adsorbed. The position (component supply position 30) is sequentially supplied.

  The electronic component supplied to the component supply position 30 by the tape feeder 31 can be picked up by the head unit 4 as will be described later.

  In the present invention, the component feeder 3 can also be provided with a tray feeder configured to supply components from a component supply container such as a pallet as a component supply device.

  The head unit 4 is an area extending between the component supply position 30 and the mounting position on the printed circuit board W so that the component supplied from the tape feeder 31 to the component supply position 30 can be picked up and mounted on the printed circuit board W. Can be moved. Specifically, the head unit 4 is supported by a head unit support member 142 extending in the X-axis direction (conveying direction of the conveyor 2) so as to be movable in the X-axis direction.

  The head unit support member 142 is supported at both ends thereof by guide rails 143 and 143 extending in the Y-axis direction (a direction orthogonal to the X-axis direction in the horizontal plane) so as to be movable in the Y-axis direction. The head unit 4 is driven in the X-axis direction via the ball screw 145 by the X-axis motor 144, and the head unit support member 142 is driven in the Y-axis direction via the ball screw 147 by the Y-axis motor 146. Is to be done.

  In the head unit 4, a plurality of heads 41 for component mounting are arranged side by side in the X-axis direction.

  Each head 41 is driven in the vertical direction (Z-axis direction) by an elevating mechanism using a Z-axis motor as a drive source, and is driven in the rotation direction (R-axis direction) by a rotation mechanism using an R-axis motor as a drive source. It has come to be.

  Each head 41 is provided with a suction nozzle (not shown) for sucking and picking up (picking up) electronic components and mounting them on the printed circuit board W.

  The head unit 4 is provided with a downward substrate imaging camera 13. The board imaging camera 13 is constituted by a CCD camera or the like, and the board imaging camera 13 can recognize the printed board W, components at the component supply position 30, and the like from the upper side.

  In addition, a component imaging camera 12 is provided upward between the conveyor 2 and the component supply units 3 on both sides. The component imaging camera 12 is configured by a line sensor camera or the like, and the component imaging camera 12 can recognize the component sucked by the head 41 of the head unit 4 from the lower side.

  As shown in FIG. 2, the tape feeder 31 includes a feeder main body 32, a top tape collection box 33 provided at the rear end of the feeder main body 32, and an electrical box 6.

  The feeder main body 32 is provided with a tape supply path 321 from the rear end portion to the top of the front end, and a component storage tape T as a reel tape is continuously supplied along the tape supply path 321.

  As shown in FIG. 3, the component storage tape T employed in this embodiment includes a base tape T1 and a top tape (cover tape) T2 adhered to the upper surface of the base tape T1.

  The base tape T1 is provided with a large number of recesses (cavities) at predetermined intervals, and in each cavity, ICs, transistors, etc. are housed as small mounting electronic components. A top tape T2 is applied to seal the components within each cavity. As the base tape T1, a tape having a bottom tape attached to the lower surface of a tape body provided with a punching through hole as a cavity can be suitably used.

  A tape feeding mechanism 34 is provided at the front end of the tape supply path 321 in the feeder main body 32. The tape feeding mechanism 34 includes a sprocket 341 that rotates by a predetermined amount. When the sprocket 341 rotates by a predetermined amount, the component storage tape T arranged on the tape supply path 321 is intermittently moved forward at a predetermined pitch. To be sent out. The sprocket motor 342 that rotationally drives the sprocket 341 is operated by receiving power from the mounting machine main body, and serves as a component supply driving load in the tape feeder (component supply device) 31.

  In front of the tape supply path 321 in the feeder main body 32, a tape installation running surface 322 on which the component storage tape T is installed is provided, and a tape guide (tape holding member) corresponding to the tape installation running surface 322 is provided. 35 is provided. The component guide tape T1 on the tape installation travel surface 322 is pressed against the tape installation travel surface 322 by the tape guide 35, thereby being supported in a stable state.

  The tape guide 35 is provided with a tape peeling portion 351, and the tape peeling portion 351 peels the top tape T2 from the base tape T1 by a predetermined amount each time the component storage tape T is fed out. ing.

  The cavity portion (component storage portion) of the base tape T1 with the top tape T2 peeled off and the upper surface opened is fed forward by the tape supply path 321 and sent to the component supply position 30. . Thus, the components supplied to the component supply position 30 are picked up by the head 41 as described above.

  On the other hand, the base tape T1 from which the parts have been taken out is fed further forward in accordance with the feeding operation by the tape feeding mechanism 34.

  A tape drawing mechanism 37 is provided in front of the top tape collection box 33 in the feeder main body 32. The tape drawing mechanism 37 includes a winding roller 371 and a pressing roller 372. The top tape T2 peeled off from the base tape T1 is folded back and is sandwiched between the rollers 371 and 372. Yes. Then, when the take-up roller 371 rotates, the top tape T2 peeled from the base tape T1 is drawn backward. The take-up motor 373 that rotationally drives the take-up roller 371 operates by receiving power from the mounting machine body side, and serves as a drive load for supplying components in the tape feeder (component supply device) 31.

  Furthermore, the top tape T <b> 2 drawn by the tape drawing mechanism 37 is collected in the top tape collection box 33.

  An opening is provided in the rear end surface of the top tape collection box 33, and an opening / closing lid 331 is provided in the opening so as to be freely opened and closed. When the top tape collection box 33 is filled with the top tape T2, the opening / closing lid 331 is opened so that the top tape T2 in the top tape collection box 33 can be taken out from the rear end opening and disposed. It has become.

  Further, the electrical box 6 provided at the lower part of the feeder body 31 has an outer peripheral wall configured as a casing 61.

  As shown in FIG. 4, an internal substrate 65 is provided in the casing 61 of the electrical box 6.

  The internal board 65 is configured by a control board that controls driving of each drive unit of the tape feeder 31, for example, the tape feeding mechanism 34 and the tape drawing mechanism 37, based on information from the control device (controller) of the mounting machine 10. ing.

  In the electrical box 6, in order to supply power to a drive motor (feeder motor) such as the tape feeding mechanism 34, power is not supplied from the power feeding unit 100 on the mounting machine body 10 </ b> A side through the electromagnetic induction coupling transformer M. A power receiving unit 200 that receives power by contact is provided (see FIG. 6).

  As shown in FIG. 5, the transformer M includes a first magnetic core F1 around which a primary coil N1 is wound around a resin bobbin B1, and a second coil N2 around which a secondary coil N2 is wound around a resin bobbin B2. The first magnetic core F1 is provided on the mounting machine body 10A side, and the second magnetic core F2 is provided on the tape feeder (component supply device) 31 side.

  In the transformer M, the first magnetic core F1 around which the primary coil N1 is wound and the secondary coil N2 are wound when the tape feeder (component supply device) 31 is attached to and detached from the mounting machine body 10A. The second magnetic core F2 can be separated.

  When the tape feeder (component supply device) 31 is mounted on the mounting machine main body 10A, the first magnetic core F1 and the second magnetic core F2 are electromagnetically coupled, but between the opposing surfaces of both the cores F1 and F2. Is formed with a predetermined minute gap g.

  In this embodiment, the end face of the tape feeder 31 comes into contact with the end face of the mounting machine body 10A so that the component supply device 31 is positioned with respect to the mounting machine body 10A, so that a predetermined gap g is always reproduced. It has become. In this embodiment, the structure in which the end surface of the tape feeder 31 and the end surface of the mounting machine main body 10 </ b> A contact each other constitutes the positioning means of the tape feeder (component supply device) 31.

  FIG. 6 is an electric circuit diagram illustrating a configuration of a component supply apparatus that is supplied with power by the power supply apparatus according to the first embodiment.

  In FIG. 6, the power supply apparatus includes a power feeding unit 100 on the mounting machine body 10 </ b> A side and a power receiving unit 200 on the tape feeder 31 side.

  In addition to the first magnetic core F1 in the electromagnetic inductive coupling transformer M, the power feeding unit 100 includes an oscillation drive circuit (oscillation drive means) OC and a primary coil wound around the first magnetic core F1 in the transformer M. A switching circuit (switching means) SC for applying a voltage to N1, and a capacitor C1 connected in series to the ground terminal of the primary coil N1 wound around the first magnetic core F1 in the transformer M. Yes.

  The oscillation drive circuit OC generates a drive signal that oscillates at a predetermined frequency and sends it to the switching circuit SC.

  The switching circuit SC is turned ON / OFF according to the frequency of the drive signal of the oscillation drive circuit OC, and a voltage having a predetermined frequency generated thereby is applied to the primary coil N1 wound around the first magnetic core F1. For example, it is composed of a series body of a pair of switching elements Q1 and Q2 connected in series with each other and a series body of a pair of damper diodes D1 and D2, and one of them is connected to the drain / source of one switching element Q1. The cathode and anode of the other damper diode D1 are connected to each other, and the cathode and anode of the other damper diode D1 are connected to the drain and source of the switching element Q2, respectively.

  The drain of one switching element Q1 is connected to the DC power supply VCC on the mounting machine body 10A side, and the source of the other switching element Q2 is grounded.

  Further, the gates of the pair of switching elements Q1, Q2 are connected to the output terminal of the oscillation drive circuit OC, and the anode-cathode connection point of the pair of damper diodes D1, D2 is wound around the first magnetic core F1. It is connected to the high potential end of the rotated primary coil N1.

  As the switching elements Q1 and Q2, for example, N-channel field effect transistors (FETs) are used. However, a P-channel type or other switching elements are used. It is not limited.

  The capacitor C1 constitutes an LC resonance circuit with a leakage inductance Lr appearing between the output end of the switching circuit SC and the high potential end of the primary coil N1 in the transformer M.

  The frequency of the drive signal from the oscillation drive circuit OC is set to be the resonance frequency of the LC resonance circuit.

  In addition to the second magnetic core F2 in the electromagnetic inductive coupling transformer M, the power receiving unit 200 rectifies the AC voltage induced in the secondary coil N2 of the transformer M and outputs a predetermined DC voltage. VC is provided.

  The DC circuit (DC unit) VC includes, for example, a rectifier circuit RC that rectifies an AC voltage induced in the secondary coil N2 of the transformer M, and a smoothing circuit EC.

  The rectifier circuit RC is constituted by, for example, a bridge rectifier circuit including four rectifier diodes D3 to D6.

  Further, the smoothing circuit EC is for smoothing by removing pulsation of the rectified output, and is constituted by, for example, a smoothing capacitor C2 interposed between the output terminal of the rectifying circuit RC and the ground. Of course, the smoothing circuit EC is not limited to the capacitor input type as in this example, but may be a choke input type that also uses a choke coil.

  Next, the operation of the power supply apparatus having the above configuration will be described.

  First, since a minute gap g is formed between the opposing surfaces of the first magnetic core F1 and the second magnetic core F2 in the electromagnetic induction coupling transformer M, the output terminal of the switching circuit SC and the transformer A leakage inductance Lr appears equivalently between the high potential end of the primary coil N1 at M.

  An element constant is set so that an LC resonance circuit is constituted by the leakage inductance Lr and the capacitance of the capacitor C1, and the frequency of the drive signal generated by the oscillation operation of the oscillation drive circuit OC is set to the resonance of the LC resonance circuit. Set to frequency.

  As the mounting machine 10 starts driving, the oscillation drive circuit OC oscillates, and a drive signal at the resonance frequency is applied to the switching circuit SC. That is, the drive signal is applied to the gate as the gate voltage of the pair of switching elements Q1 and Q2.

  By applying the drive signal, the pair of switching elements Q1 and Q2 are triggered, and the switching elements Q1 and Q2 repeat ON / OFF operation alternately according to the switching frequency corresponding to the frequency of the drive signal (LC resonance frequency). When the switching output is applied to the primary coil N1 in the electromagnetic inductive coupling transformer M, resonance occurs in a resonance circuit including the leakage inductance Lr and the capacitance of the capacitor C1.

  When the switching output is applied to the primary coil N1 of the transformer M, the number of windings of the primary coil N1 and the winding of the secondary coil N2 are provided at both ends of the secondary coil N2 in the electromagnetic inductive coupling transformer M. An alternating voltage of a magnitude according to the ratio with the number is induced.

  The AC output induced at both ends of the secondary coil N2 in the transformer M is full-wave rectified by the rectifier circuit RC in the DC circuit VC, and then the rectified voltage is smoothed by the smoothing capacitor C2.

  That is, in one half cycle of the AC output, an operation of charging the rectified current to the smoothing capacitor C2 by conducting a set of rectifying diodes D3 and D4 is obtained, and in the other half cycle of the AC output. Thus, the operation of charging the smoothing capacitor C2 by conducting the pair of rectifying diodes D5 and D6 is obtained. The charging current charged in the smoothing capacitor C2 in one half cycle of the AC output is discharged in the other half cycle of the AC output, while the charging current charged in the smoothing capacitor C2 in the other half cycle of the AC output is AC. The discharge is repeated in one half cycle of the output. Thereby, in the DC circuit VC, a predetermined DC voltage (DC OUT) obtained by rectifying and smoothing the AC output is supplied as electric power to the feeder drive system.

  In this way, the non-contact state is achieved by introducing the electromagnetic induction coupling transformer M without interposing a connecting means such as a connector from the power feeding unit 100 side of the mounting machine body 10A to the power receiving unit 200 on the feeder body 31 side. Power can be supplied at For this reason, there is no risk of poor contact compared to those employing a mechanical connection structure such as a connector, and even in situations where parts supply devices are frequently replaced under high-mix low-volume production, Power can be supplied to the component supply device more reliably.

  Since the resonance circuit is constituted by the leakage inductance Lr appearing on the primary coil N1 side of the transformer M and the capacitance of the capacitor C1, a drive signal at the resonance frequency is generated in the oscillation drive circuit OC. The current flowing through the primary coil N1 is maximized. For this reason, the energy loss at the time of transmission based on an electromagnetic inductive coupling effect | action can be reduced, and high electric power feeding efficiency is realizable.

  In addition, since the presence of a predetermined gap g between the cores F1 and F2 of the transformer M is used, a variation in transmission efficiency due to a variation in the gap g can be suppressed, and means for reducing the gap g as much as possible is provided. There is no need to introduce it separately, and a stable supply of components can be realized while enabling the use of a small electromagnetic inductive coupling transformer.

  Further, since the gap g is positively provided, the magnetic saturation of the first and second magnetic cores F1 and F2 with respect to a minute fluctuation of the gap g is compared with that in which the gap g is eliminated as much as possible. This makes it easier to introduce a small core.

  Furthermore, stable power supply can be achieved by adopting current resonance that operates stably against load fluctuations.

  Further, since it is not necessary to secure a large coupling coefficient between the primary and secondary coils N1 and N2, the degree of freedom of the shape of the first and second magnetic cores F1 and F2 is increased. By adopting a U-shaped core, the transformer M can be further miniaturized.

  FIG. 7 is a waveform diagram of feeder load current (current consumption) with respect to time when six parts are picked up from one tape feeder 31 in one picking cycle.

  As shown in FIG. 7, when a feeder load such as a motor is operating, the current consumption reaches a peak value, and when the feeder is stationary, only a constant DC voltage is supplied to the control circuit. The current consumption is small. As described above, the load current of the feeder is not always constant and greatly fluctuates with the passage of time, and power must be supplied in accordance with the largest current consumption.

  As shown in FIG. 8, at the resonance frequency f0, a resonance circuit is constituted by the leakage inductance Lr and the capacitor C1, and the energy loss is minimized and the maximum current flows. Therefore, by setting the frequency of the drive signal to be the resonance frequency of the LC resonance circuit, power can be efficiently supplied to the feeder, so that the transformer M can be reduced in size.

  FIG. 9 is an electric circuit diagram showing the configuration of the power supply apparatus according to the second embodiment of the present invention. The same or corresponding parts as those in FIG. Description is omitted.

  In FIG. 9, this power supply device includes a voltage detection circuit VD that detects the output voltage of the DC circuit VC, and a feedback circuit FB that feeds back a detection signal corresponding to the output of the voltage detection circuit VD to the oscillation drive circuit OC. And.

  The voltage detection circuit VD includes, for example, a voltage reference value setting unit and a comparator.

  The feedback circuit FB is disposed, for example, on the power receiving unit 200 side, and the light emitting diode D7 whose light intensity changes according to the detection output from the voltage detection circuit VD, and the light emitting diode as a light emitting element disposed on the power receiving unit 200 side. A phototransistor Q3 is provided as a light receiving element that receives light from the diode D7 and feeds back a signal corresponding to the light intensity to the oscillation live circuit OC.

  In this example, as shown in FIG. 10, between the light emitting diode D7 and the phototransistor Q3, the first light guide P1 disposed on the component supply device side (the power receiving unit 200 side) and the mounting machine body 10A side A second light guide P2 that is disposed on the power supply unit 100 side and guides the light from the first light guide P1 to the phototransistor Q3 is interposed.

  The first light guide P1 and the second light guide P2 are arranged at positions where their respective end faces are opposed to each other when the tape feeder (component supply device) 31 is mounted on the mounting machine body 10A. It is configured to be in a combined state.

  When the driving load of the feeder motor or the like becomes light and the output voltage of the DC circuit VC rises above a predetermined voltage, the voltage detection circuit VD detects the rise of the output voltage and responds accordingly. The detection signal from the feedback circuit FB is transmitted to the oscillation drive circuit OC. The oscillation drive circuit OC that has received this detection signal sets the frequency of the drive signal to be higher than the resonance frequency f0.

  As described above, when the feeder driving load is reduced and the output voltage of the DC circuit VC rises above a predetermined voltage, the frequency of the drive signal is set higher than the resonance frequency f0. The current flowing through the primary coil N1 becomes smaller than the maximum current, the reactive current is reduced, and the output voltage (DC OUT) of the DC circuit VC is suppressed from becoming higher than a predetermined voltage. Therefore, since an excessive current does not flow through the secondary coil N2 of the transformer M, reliable and stable power can be supplied without causing problems such as heat generation even when the coil N2 is further downsized. it can.

  As a form of the signal to be fed back, the light emission time of the light emitting diode D7 may be changed according to the voltage detection power from the voltage detection circuit VD. Alternatively, the signal may be transmitted by a medium other than light such as a microwave.

  11A and 11B show the relationship between the current and voltage flowing to the primary coil N1 side of the electromagnetic inductive coupling transformer M depending on the load when the feedback circuit FB as described above is provided. FIG.

  FIG. 12 shows the relationship between the oscillation frequency f of the drive signal and the current I flowing to the primary coil N1 side of the transformer M.

  As shown in FIG. 12, in this embodiment, the frequency of the drive signal is controlled in the range from fmin close to the resonance frequency f0 to fmax far from the resonance frequency f0.

  When the load is maximum, the frequency of the drive signal is fmin close to the resonance frequency f0, and as shown in FIG. 11B, the phases of the rectangular wave voltage and the sine wave current are substantially the same, The amplitude of is the maximum.

  On the other hand, when the load is minimum, the frequency of the drive signal shifts to the fmax side away from the resonance frequency f0, and the phase of the current having a triangular waveform as shown in FIG. Therefore, the amplitude of the current is smaller than that in the case where the feedback is not applied.

  Note that the frequency of the drive signal is controlled on the higher frequency side than the resonance frequency f0 because if the frequency of the drive signal is changed to a lower frequency side than the resonance frequency f0, a large current flows during switching operation, resulting in poor efficiency. This is because noise also tends to increase, and may become unsuitable for target current amount control.

  Further, the lower limit fmin of the control range of the drive signal is set slightly higher than the resonance frequency f0 because the resonance frequency f0 is a variation of parts and the size of the gap g between the cores F1 and F2 of the transformer M. The lower limit fmin of the control range is lower than the resonance frequency f0, and the amount of current increases even if the frequency is changed from fmin to the high frequency side. This is to prevent the situation of becoming.

  Moreover, it is practical that such a resonance frequency f0 is set to about 50 kHz to 300 kHz, and the maximum oscillation frequency fmax is 1 MHz or less.

  Incidentally, the rectifier circuit RC in the DC circuit VC is not limited to the bridge rectifier circuit described above. For example, as shown in FIG. 13, the rectifier circuit RC is composed of a double-wave rectifier circuit including a pair of rectifier diodes D10 and D11. May be.

  FIG. 14 is an electric circuit diagram showing the configuration of the component supply apparatus to which power is supplied by the power supply apparatus according to the third embodiment of the present invention. The same or corresponding parts as those in FIG. 9 of the second embodiment are shown in FIG. The same reference numerals are given and the description thereof is omitted.

  In FIG. 14, as the electromagnetic inductive coupling transformer M, another secondary coil N3 is wound around the second magnetic core F2 in addition to the secondary coil N2.

  A first DC circuit VC1 is connected to both ends of the secondary coil N2, and a second DC circuit VC2 is connected to both ends of the secondary coil N3. The output voltage of the first DC circuit VC1 DC OUT1 is supplied at a voltage corresponding to the driving voltage as power of the feed motor or the like, and the output voltage DC OUT2 of the second DC circuit VC2 is corresponding to the driving voltage as power of the control unit 65 for the driving load such as the feed motor. Supply with voltage. Thus, it is not necessary to provide a separate voltage conversion circuit by winding a plurality of secondary coils around the second magnetic core F2 to obtain a desired output voltage.

  The voltage detection circuit VD described above is connected to the output terminal of the second DC circuit VC2 and detects the output voltage DC OUT2 of the second DC circuit VC2 as in the above embodiment. ing.

  The feedback circuit FB feeds back a detection signal corresponding to the detection output of the voltage detection circuit VD to the oscillation drive circuit OC.

  The second DC circuit VC2 is configured in the same manner as in the above embodiment. Specifically, the second DC circuit VC2 includes, for example, a rectifying circuit RC2 that rectifies an AC voltage induced in the secondary coil N3 and a smoothing circuit EC2, and the rectifying circuit RC2 includes, for example, four rectifying circuits It is composed of a bridge rectifier circuit composed of diodes D30, 40, 50 and 60.

  The smoothing circuit EC2 smoothes the rectified output by removing the pulsation, and includes, for example, a smoothing capacitor C20 interposed between the output terminal of the bridge rectifier circuit RC2 and the ground. . Of course, the smoothing circuit EC2 is not limited to the capacitor input type as in this example, and a choke input type using a choke coil may also be adopted.

  Further, the second DC circuit VC2 is not limited to the combination of the rectifier circuit RC2 and the smoothing circuit EC2, and for example, a constant voltage circuit can be added.

  In this embodiment, since the secondary coil N2 and another secondary coil N3 in the electromagnetic inductive coupling transformer M are wound around the same second magnetic core F2, current consumption due to load fluctuations of the feed motor and the like is reduced. Since the change can also be detected from the output of the DC circuit VC2, when the load is reduced, the frequency of the drive signal is increased and the current flowing through the secondary coil N2 is reduced as in the above embodiment. Can be made.

  Furthermore, since the control unit 65 is required to supply a constant voltage with higher accuracy than that of a drive unit such as a motor, the control unit 65 has a high accuracy from the dedicated second DC circuit VC2 of the control unit 65. By detecting the output voltage and performing feedback control, the DC output can be more accurately stabilized without being greatly affected by load fluctuations.

It is a top view which shows the mounting machine with which the component supply apparatus supplied with electric power by the electric power supply apparatus concerning 1st Embodiment of this invention was applied. It is side surface sectional drawing which shows the tape feeder as a components supply apparatus of 1st Embodiment. It is side surface sectional drawing which shows the tape guide periphery of the tape feeder in 1st Embodiment. It is explanatory drawing of the coupling structure of the tape feeder and mounting machine main body side in 1st Embodiment. It is side surface sectional drawing which shows the circumference | surroundings of the transformer for electromagnetic induction coupling applied to the electric power supply apparatus of 1st Embodiment. It is an electric circuit diagram which shows the structure of the component supply apparatus with which electric power is supplied by the power supply apparatus in 1st Embodiment. In the electric power supply apparatus of 1st Embodiment, it is a wave form diagram of feeder load electric current (consumption current) in the case of attracting | sucking six components in one adsorption | suction cycle from one tape feeder. In the component supply apparatus of 1st Embodiment, it is a wave form diagram of the consumption current at the time of resonance. It is an electric circuit diagram which shows the structure of the component supply apparatus with which electric power is supplied by the power supply apparatus in 2nd Embodiment of this invention. It is explanatory drawing of the coupling structure of the tape feeder and mounting machine main body side in 2nd Embodiment. In 2nd Embodiment, it is a wave form diagram which shows the relationship between the electric current and voltage which flow into the primary coil side of the electromagnetic induction coupling transformer when load is the minimum. In 2nd Embodiment, it is a wave form diagram which shows the relationship between the electric current and voltage which flow into the primary coil side of the electromagnetic induction coupling transformer in case load is the maximum. In the electric power supply apparatus of 2nd Embodiment, it is explanatory drawing in the case of shifting to the higher side rather than the frequency at the time of resonance, and controlling an output voltage. In the electric power supply apparatus of this invention, it is an electric circuit diagram which shows the modification of a rectifier circuit. It is an electric circuit diagram which shows the structure of the components supply apparatus with which electric power is supplied by the electric power supply apparatus in 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mounting machine 10A Mounting machine main body 31 Component supply apparatus (tape feeder)
DESCRIPTION OF SYMBOLS 100 Power supply part 200 Power receiving part C1 Capacitor F1 1st magnetic core F2 2nd magnetic core FB Feedback circuit (feedback means)
f0 Resonance frequency g Gap N1 Primary coil N2 Secondary coil Lr Leakage inductance M Electromagnetic inductive coupling transformer OC Oscillation drive circuit (oscillation drive means)
SC switching circuit (oscillation drive means)
VC, VC2 DC circuit (DC unit)
VD voltage detection circuit (voltage detection means)

Claims (5)

The power supply unit provided on the mounting machine body side and the power receiving unit provided on the component supply device side of the mounting machine are supplied with power by a power supply device that is separably coupled via an electromagnetic induction coupling transformer. In the component supply device
The power feeding unit is
Oscillation drive means for generating a drive signal with a predetermined frequency;
Switching means for performing ON / OFF operation according to the frequency of the drive signal of the oscillation drive means and applying a voltage of a predetermined frequency to a primary coil wound around the first magnetic core in the transformer;
A capacitor connected in series to the ground terminal of the primary coil of the transformer,
The power receiving unit
DC means for rectifying an AC voltage induced in a secondary coil wound around the second magnetic core of the transformer and outputting a predetermined DC voltage;
A predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer in a state where the component supply device is mounted on the mounting machine body,
The frequency of the drive signal by the oscillating drive means is set according to the resonance frequency of the LC resonance circuit formed by the leakage inductance due to the gap of the transformer and the capacitor, and the power is supplied by the power supply device. Parts supply device to be supplied.   The positioning device according to claim 1, further comprising: positioning means for positioning a mounting position of the component supply device with respect to the mounting machine main body so that a predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core. Parts supply equipment. Voltage detection means for detecting the output voltage of the direct current means;
Feedback means for sending a detection signal corresponding to the output of the voltage detection means to the oscillation drive means,
The oscillation drive means receives a detection signal from the feedback means when the component supply drive load becomes smaller and the output voltage of the DC conversion means rises above a predetermined voltage, and is higher than the resonance frequency. The component supply device according to claim 1, wherein the component supply device is set so as to output a drive signal having a frequency shifted to. A mounting machine provided with a power supply device in which a power feeding unit provided on the mounting machine body side and a power receiving unit provided on the component supply device side are detachably coupled via an electromagnetic induction coupling transformer. And
The power feeding unit is
Oscillation drive means for generating a drive signal with a predetermined frequency;
Switching means for performing ON / OFF operation according to the frequency of the drive signal of the oscillation drive means and applying a voltage of a predetermined frequency to a primary coil wound around the first magnetic core in the transformer;
A capacitor connected in series to the ground terminal of the primary coil of the transformer,
The power receiving unit
DC means for rectifying an AC voltage induced in a secondary coil wound around the second magnetic core of the transformer and outputting a predetermined DC voltage;
A predetermined gap is formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer,
The frequency of the drive signal by the oscillation drive means is set according to the resonance frequency of the LC resonance circuit composed of the leakage inductance due to the gap of the transformer and the capacitor. In a mounting machine in which a power feeding unit provided on the mounting machine body side and a power receiving unit provided on the component feeding apparatus side of the mounting machine are detachably coupled via an electromagnetic induction coupling transformer, the component feeding apparatus A power supply method for supplying power to
The switching unit is turned ON / OFF according to the frequency of the drive signal generated by the oscillation drive unit in the power feeding unit, and a voltage having a predetermined frequency is applied to the primary coil of the transformer. While rectifying and smoothing the AC voltage induced in the secondary coil to output a predetermined DC voltage,
A leakage inductance due to a predetermined gap formed between the opposing surfaces of the first magnetic core and the second magnetic core in the transformer in a state where the component supply device is mounted on the mounting machine body, and a primary coil of the transformer A power supply method for a component supply apparatus, wherein a frequency of a drive signal by the oscillation drive means is set according to a resonance frequency of an LC resonance circuit constituted by a capacitor connected in series to a ground terminal of the component.

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