JP2009044918A - Non-contact power feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently supply power in non-contact manner to a load by utilizing the phenomenon of electromagnetic induction. <P>SOLUTION: A power feed line 34, to which a high-frequency current is supplied from a high-frequency power source 32, is coupled with a magnetic core 36, and an AC voltage induced in a secondary winding 37 wound on the magnetic core 36 is power-converted and supplied to a load 39. The power feed line 34 consists of a plurality of unit power feed lines 40 and a connection module 41; a plurality of unit power feed lines 40 wherein connectors 44 and 45 are fitted to both ends of a unit-length cable containing a plurality of conductors 43, are connected in series. At the connection module 41, the conductors of two unit power feed lines positioned at both ends are connected each other, to form a single conductor 47, and both the ends of the single conductor 47 are connected to high-frequency output terminals 42a and 42b of the high-frequency power source 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-contact power supply apparatus that uses an electromagnetic induction phenomenon to supply power to a load in a non-contact manner from an AC power source.

For example, as a method of supplying power in a non-contact manner to a load mounted on a moving body moving on a predetermined route such as a train, a train, a monorail, and an elevator from a fixed AC power source such as a commercial power source, Employing the principle of electromagnetic induction shown in FIG. 12 has been put into practical use (see Non-Patent Document 1). As shown in the figure, when an alternating current i _{1 is} passed through the electric wire (primary coil), a magnetic flux φ is generated around the current. When this magnetic flux φ penetrates the secondary coil, an alternating voltage V ₂ is induced at both ends of the secondary coil. Power is supplied to the lamp as a load by the AC voltage V _2.

  Specifically, as shown in FIG. 13, a high-frequency current is supplied from a high-frequency power source 1 on the power supply side to a feeder line (primary coil) 2. On the power receiving side, the feeder line 2 passes through each groove of the magnetic core 3 having an E-shaped cross section. A secondary winding (secondary coil) 4 is wound around the magnetic core 3, and a receiving unit 5 is connected to the secondary winding 4. That is, electrical energy is taken out from the feeder 2 in a non-contact manner by electromagnetic induction by a secondary winding (secondary coil) 4 wound around the magnetic core 3. The power supply line 2 is a litz wire with little loss.

  FIG. 14A shows the configuration of the non-contact power feeding device described in Patent Document 1. This apparatus includes a power source 6, a feeder line 7 (a portion 7 a installed on the track side, a portion 7 b laid in a section between the power source and the track), and a carriage 9 on which pickup means 8 is mounted. The power source 6 causes a high-frequency current to flow through the feeder line 7. The pickup means 8 mounted on the carriage 9 takes out electric power from the feeder line 7 via magnetic flux by electromagnetic induction and supplies it to the load.

  The feeder 7a made of a coaxial cable has a cross-sectional shape shown in FIG. An outer sheath wire 12 is disposed so as to surround the core wire 10 with an insulating wire 11 sandwiched between outer portions of the core wire 10, and the whole is covered with a sheath 13. The core wire 10 is a single wire or a litz wire. The outer sheath wire 12 is composed of a plurality of single wires arranged in parallel with the core wire 10 or a meshed wiring member.

FIG. 15A shows a non-contact power feeding device incorporated in an elevator described in Patent Document 2. Guide rails 14a and 14b are attached to opposite sides of a hoistway (not shown), and the car 15 moves up and down along the guide rails 14a and 14b. A magnetic core 16 having an E-shaped cross section shown in the enlarged view of FIG. 15B is fixed to the side surface of the car 15, and the feed lines 17 and 17 pass through the respective grooves as the car 15 moves up and down. . A high-frequency current is supplied from a high-frequency power source 18 provided in the machine room above the hoistway to the feeder lines 17 and 17. A secondary winding 19 is wound around the magnetic core 16, and an induced voltage generated in the secondary winding 19 is converted into electric power that can be supplied to a load in the car 15 by a step-down transformer.
Masami Takazo, Nao Kondo, Katsuyuki Morita, Isao Watanabe, Taiji Odate, “Development of a high-speed transport cart using non-contact power feeding”, 1997 Annual Conference of the Institute of Electrical Engineers of Japan, pp1-4 Japanese Patent Laid-Open No. 2002-2335 JP 2006-137609 A

  However, the contactless power supply devices described in Patent Documents 1 and 2 described above still have the following problems to be solved.

  As described with reference to FIG. 12, the high-frequency current flowing through the feeder lines 7 and 17 (primary coils) wired so as to pass through the grooves of the magnetic cores 8 and 16 is supplied to the feeder lines 7 and 17. Is generated in proportion to the number of turns of the primary coil, that is, the number of the feeder lines 7 and 17. Inductive power is generated by electromagnetic induction in the secondary coils (secondary windings) 4 and 19 interlinked with the magnetic flux Φ.

  Therefore, in order to obtain a desired induced voltage V in the secondary coils (secondary windings) 4 and 19, it is necessary to increase the number of turns of the primary coil, that is, the number of feeder lines 7 and 17. As described above, the mobile body to which power is transmitted by this non-contact power feeding device is moving at high speed, and the number of feeder lines 7 and 17 is reduced due to physical factors such as a narrow gap with the non-operating part. If it increases, the structure of the apparatus or system in which the non-contact power feeding apparatus is incorporated becomes complicated, the manufacturing cost of the apparatus or system increases, and the manufacturing time increases.

  Further, when the number of the power supply lines 7 and 17 increases, there is a concern that the power supply lines 7 and 17 may be entangled with each other or may be caught by other components during the operation of the moving body, thereby causing an unexpected trouble in the operation. . Furthermore, since the number of wirings (feed lines) 7 and 17 increases, regular maintenance and inspection becomes complicated.

  Further, in the non-contact power feeding device incorporated in the elevator shown in FIG. 15, the induced voltage generated in the secondary winding 19 wound around the magnetic core 16 can be supplied to the load in the car 15 by the step-down transformer. However, since the elevator car 15 is operated as required by the user, the induced voltage generated in the secondary winding 19 wound around the magnetic core 16 is converted into a step-down transformer. There is a concern that the supply voltage when supplying to each electric component in the car fluctuates depending on the operating condition of the car 15 and the usage condition of the load in the car 15.

  The present invention has been made in view of such circumstances, and can simplify the manufacture of an apparatus or a system, can improve the work efficiency of maintenance / inspection work, and can realize high power transmission efficiency to a load from the power supply side. Another object of the present invention is to provide a non-contact power feeding device that can supply a stable voltage to a load.

  In order to solve the above problems, the present invention provides a high frequency power source that generates a high frequency current having a frequency within a range of 60 Hz to 10 kHz from an AC power supplied from the AC power source, and a high frequency current supplied from the high frequency power source. A feed line that flows, a magnetic core that is magnetically coupled to the feed line in a non-contact manner, and a secondary that is wound around the magnetic core and induces an AC voltage corresponding to a high-frequency current flowing through the feed line A winding and a power receiving unit that rectifies an AC voltage induced in the secondary winding and supplies a constant voltage leveled to the load.

  And in the non-contact power feeding device of the present invention, the power feeding wire is a plurality of unit power feeding wires with connectors attached to both ends of a unit length cable including a plurality of conducting wires, and the plurality of unit power feeding wires are connected to both ends. A connection in which two unit feeder wires located at both ends in a state of being connected in series by a connector are connected to each other to form one conductor, and both ends of the one conductor are connected to a high frequency output terminal of a high frequency power source. It consists of modules.

  In the non-contact power feeding device configured as described above, the power feeding line through which the high-frequency current flows is a series of unit feeding lines having a unit length of, for example, 1 m including a plurality of conducting wires, in a necessary length. Thus, it is only necessary to connect the two unit feeders located at both ends to the connection module.

  Therefore, the power supply line through which the high-frequency current flows can be regarded as a single cable, so that the wiring is not complicated. Further, the circuit configuration is not complicated.

  And the some conducting wire which comprises each unit electric power feeding line is connected so that it may become one conducting wire with a connection module. Therefore, the magnetic field Φ generated in the vicinity of the magnetic core is increased, and the power transmission efficiency is improved.

  Further, the power receiving unit rectifies the AC voltage induced in the secondary winding and supplies a constant voltage leveled to the load, so that the load voltage can be stabilized.

  In another invention, the load, the magnetic core, the secondary winding, and the power receiving unit are mounted on the moving body, and the power supply line is laid along the moving direction of the moving body.

  Thus, when supplying electric power to the load mounted on the moving body in a non-contact manner, it is necessary to lay the feeder line along the moving direction of the moving body. In this case, the required length of the feeder line is at least the moving distance of the moving body.

  In the present invention, by changing the number of unit power supply lines incorporated in the power supply line, a power supply line having a length corresponding to the moving distance of the moving body can be easily obtained.

  In another aspect of the invention, the high-frequency power source of the non-contact power feeding device of the present invention includes a rectifier that rectifies AC power supplied from an AC power source into DC, a smoothing circuit that smoothes DC rectified by the rectifier, and the smoothing circuit. An inverter that converts the direct current smoothed by the circuit into single-phase high-frequency power, an inverter control unit that controls the output frequency and output voltage of the inverter, and a single-phase high-frequency voltage output from the inverter into a low-frequency high-frequency current And a step-down transformer for converting and outputting to a high-frequency output terminal.

  By using the high-frequency power source configured as described above, a high-frequency current can be easily created from an AC power source. Furthermore, since a low voltage and a large current can be passed by adopting a step-down transformer, a cable with a smaller number of conductors can be adopted as a unit feeder line.

  According to another invention, in the non-contact power supply apparatus having the high-frequency power supply having the above-described configuration, a low-pass filter for removing harmonic components contained in the high-frequency electric voltage output from the inverter is inserted between the inverter and the step-down transformer. is doing. Furthermore, it is also possible to insert a low-pass filter for removing harmonic components contained in the low-frequency high-frequency current output from the step-down transformer between the step-down transformer and the high-frequency output terminal.

  Furthermore, in another invention, a capacitor that compensates for a voltage drop due to an inductance component caused by the winding of the one conducting wire is connected in series to the one conducting wire connected by the connection module. It is inserted.

  A plurality of conductors constituting a feeder line in which a plurality of unit feeder lines are connected in series are connected to each other to form one conductor wire, and a coil whose number of turns is indicated by the number of core wires is formed. When flowing, a voltage drop due to an inductance component occurs. Therefore, a voltage drop is compensated by inserting a capacitor in series with this coil.

  In another invention, the power receiving unit that processes the alternating voltage induced in the secondary winding and supplies it to the load, the rectifier that rectifies the alternating voltage induced in the secondary winding, and the load voltage of the load A load voltage detection unit for detecting the output voltage, a PWM control unit for outputting a PWM (pulse width modulation) signal corresponding to an error voltage between the load voltage detected by the load voltage detection unit and the constant voltage, and on by the PWM signal A switching element that is controlled to be turned off is incorporated, and is included in the voltage controller that controls the DC voltage that is output from the rectifier and supplied to the load, and is included in the DC voltage that is voltage-controlled by this voltage controller and supplied to the load It is equipped with a filter that removes harmonic components. By incorporating the power receiving unit having such a configuration, the load voltage can be always controlled to a constant value.

  According to the present invention, a plurality of unit-length unit feeders including a plurality of conducting wires are connected in series, both ends are connected to a connection module, and the connection module is connected to a high-frequency power source. (Turn) power supply line can be configured easily. As a result, manufacturing can be simplified, work efficiency of maintenance / inspection work can be improved, and high power transmission efficiency from the power supply side to the load can be realized.

  Hereinafter, the non-contact electric power feeder of each embodiment of this invention is demonstrated using drawing. In this specification, a case where the non-contact power feeding device is incorporated in an elevator will be described as an example.

(First embodiment)
FIG. 1 is a schematic configuration diagram of an elevator in which a non-contact power feeding apparatus according to a first embodiment of the present invention is incorporated.

  A control panel 23 and a hoisting machine 24 are installed in a machine room 22 provided above an elevator hoistway 21 formed in a building such as a building. A main rope 29 having a car 27 attached to one end and a counterweight 28 attached to the other end is hung on the main sheave 25 and the baffle sheave 26 of the hoisting machine 24. In the control panel 23 to which the three-phase AC power is supplied from the external three-phase commercial power supply 30 via the power cable 31, a motor drive circuit for rotating the motor incorporated in the hoisting machine 24, a hall call (not shown) In response to a call that designates a destination floor by button operation of a button or a car call button, an operation control unit or the like that issues an instruction to move the car 27 to the designated floor to the motor drive circuit is incorporated.

Further, in the machine room 22, a high-frequency power source 32 to which three-phase AC power is supplied from a three-phase commercial power source 30 via a power cable 31 is installed. The high-frequency power source 32 generates a single-phase high-frequency current I having a frequency f _S set by the setting device 33 of the control panel 23 within a range of 60 Hz to 10 kHz from input three-phase AC power of, for example, 200V. Then, it is made to flow through the feeder line 34 wired in the hoistway 21.

  The feeder line 34 is supported by, for example, a guide rail 35 that guides the vertical movement of the car 27 that is fixed to the side wall 21a in the hoistway 21 via a support member. The power supply line 34 is folded at the lower end of the guide rail 35. For convenience, it is assumed that there are power supply lines 34a and 34b parallel to each other with the folded portion interposed therebetween.

  On the other hand, a magnetic core 36 having an E-shaped cross section is attached to the side surface 27 a of the car 27. The feed lines 34 a and 34 b of the feed line 34 pass through the grooves 36 a and 36 b of the magnetic core 36, and a secondary winding 37 is wound around the magnetic pole 36 c at the center of the magnetic core 36. Both ends of the secondary winding 37 are connected to the power receiving unit 38. A DC load 39 is connected to the power receiving unit 38. The load 39 is, for example, an illuminator that illuminates the inside of the car 27, a car call button, a power circuit for various displays including a destination, a door switch, and the like.

  FIG. 2 is a perspective view showing a specific configuration of the feeder line 34 (34a, 34b). The power supply line 34 is a connection for connecting a plurality of unit power supply lines 40 connected in series and two unit power supply lines 40a and 40b located at both ends of the plurality of unit power supply lines 40 connected in series. The module 41 is comprised. The connection module 41 is connected to the high frequency output terminals 42 a and 42 b of the high frequency power supply 32.

  In each unit feeder 40, as shown in FIGS. 3A and 3B, for example, a female connector 44 and a male connector are attached to both ends of a flat cable having a unit length of, for example, 1 m including nine conductors 43. The connector 45 is attached. Therefore, a plurality of unit feed lines 40 are connected in series as shown in FIG. 2 by inserting and mounting the male connector 45 of another unit feed line 40 to the female connector 44 of the unit feed line 40. Is possible.

  FIG. 4A is a perspective view showing a schematic configuration of the connection module 41, and FIG. 4B is a circuit diagram of the connection module 41. A female connector 44a is formed on one side surface of the connection module 41, and a male connector 45a is formed on the other side surface. Each connector 44a, 45a is provided with nine terminals 46a, 46b numbered from 1 to 9, and the first terminal 46a of the female connector 44a is connected to one high frequency of the high frequency power supply 32. It is connected to the output terminal 42a. The ninth terminal 46 b of the male connector 45 b is connected to the other high frequency output terminal 42 b of the high frequency power supply 32. Furthermore, the first to eighth terminals 46b of the male connector 45a are connected to the second to ninth terminals 46a of the female connector 44a.

  The female connector 44a of the connection module 41 is attached to the male connector 45 of one unit power supply line 40a located at both ends of the plurality of unit power supply lines 40 connected in series. In addition, the male connector 45a of the connection module 41 is attached to the female connector 44 of the other unit power supply line 40b located at both ends of the plurality of unit power supply lines 40 connected in series.

  In this way, one end and the other end of the nine conductors 43 included in the feeder line 34 including the plurality of unit feeder lines 40 connected in series are connected while the terminals 46a and 46b are shifted in order. As a result, the free ends of the nine conductors 43 included in the unit feeder line 40 of the feeder line 34 are connected to each other, and one conductor 47 is formed as shown in the equivalent circuit of FIG. Then, both ends of the formed conductive wire 47 are connected to the high frequency output terminals 42 a and 42 b of the high frequency power supply 32 via the first terminal 46 a and the ninth terminal 46 b of the connection module 41. Further, the formed one conducting wire 47 constitutes a coil having “9” turns. Therefore, a high-frequency current is supplied from the high-frequency power supply 32 to the single conducting wire 47.

  FIG. 6 is a circuit diagram of the power receiving unit 38 that converts the alternating voltage induced in the secondary winding 37 into a direct current and supplies it to the load 39.

The high-frequency AC voltage induced in the secondary winding 37 is converted to DC by the rectifier 48, the voltage is controlled to a fixed voltage V _S by the voltage controller 59, and the harmonics are generated by the filter 52 including the smoothing capacitor 52a. After the components are removed, the DC load 39 is supplied. The voltage at both ends of the load 39, that is, the load voltage V that changes with time as shown in the time chart of FIG. 7 is detected by the load voltage detector 53 and sent to the subtractor 55. The voltage command setting unit 54 sends the predetermined voltage V _S shown in FIG. 7 for the DC load 39 to operate under the optimum conditions to the subtractor 55. The specified voltage V _S is set to 100 V (volts), for example, when the load 39 includes the fluorescent lamp described above.

As shown in FIG. 7, the subtracting unit 55 calculates an error voltage Ve (= V−V _S ) from the specified voltage V _S of the load voltage V and sends it to the PI control unit 56. In the PI control unit 56, a proportional (P) calculation unit 56a that performs a proportional calculation that multiplies the time-varying error voltage Ve by a constant Kp, and the time-varying error voltage Ve. An integration (I) calculation unit 56b that performs an integration calculation that integrates with an integration constant Ki, and an adder 56c that adds the proportional calculation result and the integration calculation result and outputs the result as an error control voltage V _C are incorporated. The PI control unit 56 sends the calculated error control voltage V _C that changes with time as shown in FIG. 7 to the PWM control unit 57. Therefore, the period load voltage V is equal to the specified voltage V _S, the error control voltage V _C becomes 0 v (volt).

As shown in the time chart of FIG. 7, the carrier generation unit 58 creates a carrier signal C _A composed of a triangular wave with a period T _C and sends it to the PWM control unit 57.

The PWM control unit 57 compares the carrier signal C _A with the error control voltage V _C , creates a PWM signal p that becomes a high level during a period when the error control voltage V _C is equal to or lower than the carrier signal C _{A, and} performs voltage control. The signal is sent to the switching element 49 including the transistor of the unit 59.

  The voltage control unit 59 is connected in parallel with the switching element 49 and the diode 51 of the illustrated polarity inserted in series between the (+) side terminal of the rectifier 48 and the (+) side terminal of the load 39. The reactor 50 is comprised. In the voltage control unit 59 having such a configuration, when the PWM signal p is in a high level period, the switching element 49 is turned on, and the reactor 50 is charged with the current from the rectifier 48. When the PWM signal p enters a low-high level period, the switching element 49 is turned off and the diode 51 goes in the forward direction. Therefore, the charge charged in the reactor 50 moves to the smoothing capacitor 52a, that is, the terminal voltage of the smoothing capacitor 52a, that is, The load voltage V increases. The electric charge charged in the smoothing capacitor 52a is consumed by the load 39.

When the load voltage V is lower than the specified voltage V _S , the charging period of the reactor 50 is long. Therefore, the terminal voltage of the smoothing capacitor 52a increases, and when the load voltage V is higher than the specified voltage V _S , the charging period of the reactor 50 is reached. Therefore, the terminal voltage of the smoothing capacitor 52a decreases. As a result, the load voltage V matches the specified voltage V _S.

Thus, the specified voltage V _S is always applied to the load 39 regardless of the operating state of the load 39.

  FIG. 8 is a schematic configuration diagram of the high-frequency power source 32. The 60 Hz, 200 v three-phase alternating current supplied from the three-phase commercial power supply 30 via the power cable 31 is converted into direct current by a rectifier 60 comprising a three-phase bridge circuit, and a smoothing circuit 61 comprising a direct current reactor 61a and a capacitor 61b. Thus, the harmonic component contained in the direct current is removed. The direct current from which the harmonic component has been removed is input to the direct current side terminals 63 a and 63 b of the next inverter 62. In the inverter 62, four parallel circuits 64 of diodes and switching elements are connected in a single-phase bridge between the DC side terminals 63a and 63b. The switching elements of each parallel circuit 64 are energized and controlled by a PWM (pulse width modulation) signal output from the inverter control unit 65.

  Therefore, the inverter 62 converts the input direct current into alternating current. A step-down transformer 67 that converts the high-frequency voltage output from the inverter 62 into a low-frequency high-frequency voltage and outputs it to the high-frequency output terminals 42a and 42b is connected between the AC side terminals (output terminals) 66a and 66b of the inverter 62. Has been.

  The inverter control unit 65 to which drive power is supplied from the three-phase commercial power supply 30 changes the pulse width and cycle of the PWM signal sent to the inverter 62 based on the control from the control panel 23, thereby The amplitude and frequency of the output voltage can be varied. Therefore, the operator can set the amplitude and frequency f of the high-frequency voltage V output from the high-frequency power source 32 to the power supply line 34 (34a, 34b) to arbitrary values using the setting device 33.

  In the non-contact power feeding device of the first embodiment configured as described above, the power feed lines 34 (34a, 34b) through which the high-frequency current I output from the high-frequency power source 32 flows are attached to the side surface of the car 27, and are magnetic. The secondary winding 37 that is magnetically coupled to the core 36 and wound around the magnetic pole 36c of the magnetic core 36 induces an AC voltage corresponding to the high-frequency magnetic field Φ generated by the high-frequency current I. The AC voltage is converted into DC by the power receiving unit 38 and supplied to the DC load 39.

  In this case, as shown in FIGS. 2, 3 (a) and 3 (b), the feeder 34 (34 a, 34 b) includes, for example, nine conductors 43 and has a unit length of 1 m, for example. A plurality of unit feeders 40 each having a female connector 44 and a male connector 45 attached to both ends thereof are connected in series. And it connects with the high frequency output terminals 42a and 42b of the high frequency power supply 32 via the connection module 41 located in the both ends in the several unit feeder 40 connected in series.

  Depending on the connection state of the terminals 46a and 46b in the connection module 41, the feed line 34 is constituted by a single coiled conductor 47 having the number of turns “9” as shown in the equivalent circuit of FIG. A high-frequency current is supplied from the high-frequency power supply 32 to the single conducting wire 47. It is possible to easily increase (multi-turn) the actual number of power supply lines 34a and 34b passing through the grooves 36a and 36b of the magnetic core 36 (the number of conductive wires 43). And the alternating voltage induced by the secondary winding 37 wound by the magnetic pole 36c of the center of the magnetic core 36 can be raised. Therefore, the power supplied to the load 39 can be increased easily.

  In addition, when unit feeders 40 having a unit length of 1 m or the like are produced in large quantities in a factory and an elevator construction request is generated, according to the moving distance (service floor number) of the elevator car 27 as a moving body. Since the number of unit feeders 40 to be connected in series may be set, the manufacturing of this non-contact power feeding device can be facilitated and the manufacturing period can be shortened.

  Furthermore, since the nine electric wires 43 flowing through the grooves 36a and 36b of the electromagnetic core can be handled as one cable, it can be easily incorporated in a place where the gap with the non-operation part is narrow, During operation of the moving body, it is possible to prevent unexpected troubles in operation due to tangling of the power supply lines 38 or being caught by other components, and periodic maintenance and inspection are simplified. The

Further, as the high frequency power source 32, the alternating current is once converted into direct current by the rectifier 60 and then the high frequency current having an arbitrary current value and frequency is obtained by the inverter 62. The power supplied to the load 39 can be easily adjusted according to the required power capacity. Further, the power receiving unit 38 always applies a constant specified voltage V _S to the load 39 regardless of the operating state of the load 39, that is, regardless of load fluctuations.

  Further, by adopting the step-down transformer 67 at the output stage of the high-frequency power source 32, low voltage and large current can be passed through the feeder line 34. Therefore, the number of the conductive wires 43 of the unit feeder line 40 can be reduced, and thus the economy. A non-contact power feeding device can be realized.

(Second Embodiment)
FIG. 9 is a schematic configuration diagram of a high-frequency power source incorporated in the non-contact power feeding apparatus according to the second embodiment of the present invention. The same parts as those of the high frequency power supply 32 of the first embodiment shown in FIG. Other parts are the same as those shown in FIGS.

  In the high frequency power supply 32a in the non-contact power feeding apparatus according to the second embodiment, a low pass filter 68 including a series reactor 68a and a capacitor 68b is interposed between the output terminals 66a and 66b of the inverter 62 and the step-down transformer 67. Has been.

  In the high frequency power supply 32a in the non-contact power feeding device according to the second embodiment configured as described above, the ripple component included in the high frequency alternating current output from the inverter 62 is removed by the low pass filter 68. The burden on the transformer 67 can be reduced. Further, the harmonic component of the high-frequency current supplied to the feeder line 34 (34a, 34b) is also removed, the waveform becomes a sine waveform, wasteful power loss is suppressed, and power consumption can be suppressed.

(Third embodiment)
FIG. 10 is a schematic configuration diagram of a high-frequency power source incorporated in the non-contact power feeding apparatus according to the third embodiment of the present invention. The same parts as those of the high frequency power supply 32 of the first embodiment shown in FIG. Other parts are the same as those shown in FIGS.

  In the high frequency power supply 32b in the non-contact power feeding device according to the third embodiment, a low pass filter 69 including a series reactor 69a and a capacitor 69b is interposed between the step-down transformer 67 and the high frequency output terminals 42a and 42b. .

  In the high-frequency power supply 32 b in the non-contact power feeding device according to the second embodiment configured as described above, a ripple component included in the high-frequency voltage output from the inverter 62 and reduced in voltage by the step-down transformer 67 is supplied to the low-pass filter 69. Removed. In the third embodiment, since the harmonic component due to the step-down transformer 67 is also removed, compared to the second embodiment, the harmonic component of the high-frequency current supplied to the feeder line 34 (34a, 34b). Can be further reduced.

(Fourth embodiment)
FIG. 11 is an equivalent circuit diagram of a connection portion of the power supply line 34 (34a, 34b) to the high frequency power supply 32 via the connection module 41 in the non-contact power supply apparatus according to the fourth embodiment of the present invention. The same parts as those in the equivalent circuit diagram of the connection part to the high frequency power supply 32 of the first embodiment shown in FIG. Other parts are the same as those shown in FIGS. 1 to 4 and FIGS.

  In the fourth embodiment, one high frequency output terminal 42a of the high frequency power supply 32 and the first terminal 46a of the female connector 44a, to which the first conductive wire 43 of the unit feeding line 40a in the connection module 41 is connected, are connected. A capacitor 70 is inserted in series with the capacitor 70.

  As described above, the nine conductors 43 constituting the power supply line 34 become one conductor 47 constituting a coil having 9 turns by the connection module 41 as shown in FIG. Therefore, a high-frequency current is supplied from the high-frequency power source 32 to one conductive wire 47 constituting the coil. As a result, a voltage drop due to the inductance component of the coil occurs. Therefore, the capacitor 70 is inserted in series with this coil to compensate for the voltage drop.

  The present invention is not limited to the above-described embodiments. It goes without saying that the non-contact power feeding device of the present invention can be applied to devices other than elevators. For example, electric power can be supplied in a non-contact manner to a moving body that moves on a predetermined route such as a train, a train, or a monorail.

1 is a schematic configuration diagram of an elevator in which a non-contact power feeding device according to a first embodiment of the present invention is incorporated. The perspective view which shows the detailed structure of the feeder of the non-contact electric power feeder in the same embodiment The perspective view which shows the unit feeder which comprises the feeder of the non-contact electric power feeder in the same embodiment The perspective view and circuit diagram of the connection module which comprises the feeder of the non-contact electric power feeder in the same embodiment Equivalent circuit diagram of a feeder line in the contactless power feeder of the embodiment Circuit diagram of a power receiving unit in the contactless power supply device of the same embodiment The time chart which shows operation | movement of the power receiving part in the non-contact electric power feeder of the embodiment Schematic configuration diagram of a high-frequency power supply in the contactless power supply device of the embodiment Schematic configuration diagram of a high-frequency power source in a non-contact power feeding device according to a second embodiment of the present invention Schematic configuration diagram of a high-frequency power source in a non-contact power feeding device according to a third embodiment of the present invention Equivalent circuit diagram of the feeder line in the non-contact power feeder according to the fourth embodiment of the present invention Diagram showing the principle of electromagnetic induction Diagram showing a typical non-contact power feeding device The figure which shows the conventional non-contact electric power feeder The figure which shows the conventional non-contact electric power feeder of the state integrated in the elevator

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Hoistway, 22 ... Machine room, 23 ... Control panel, 27 ... Car, 30 ... Three-phase commercial power supply, 31 ... Power cable, 32, 32a, 32b ... High frequency power supply, 34, 34a, 34b ... Feed line, 35 ... guide rail, 36 ... magnetic core, 37 ... secondary winding, 38 ... power receiving unit, 39 ... load, 40 ... unit feeder, 41 ... connection module, 42a, 42b ... high frequency output terminal, 48, 60 ... rectifier, DESCRIPTION OF SYMBOLS 49 ... Switching element, 50 ... Reactor, 51 ... Diode, 52 ... Filter, 53 ... Load voltage detection part, 54 ... Voltage command setting part, 55 ... Subtraction part, 56 ... PI control part, 57 ... PWM control part, 58 ... Carrier generation unit, 61 ... smoothing circuit, 62 ... inverter, 65 ... inverter control unit, 67 ... step-down transformer, 68, 69 ... low-pass filter, 70 ... capacitor

Claims (7)

A high frequency power source for generating a high frequency current having a frequency within a range of 60 Hz to 10 kHz from the AC power supplied from the AC power source;
A feed line through which a high-frequency current supplied from this high-frequency power supply flows,
A magnetic core that is magnetically coupled to the feeder line in a non-contact manner;
A secondary winding that is wound around the magnetic core and in which an alternating voltage corresponding to a high-frequency current flowing through the feeder line is induced;
A power receiving unit that rectifies the AC voltage induced in the secondary winding and supplies a constant voltage leveled to the load;
The feeder lines are positioned at both ends in a state in which a plurality of unit feeder lines having connectors attached to both ends of a unit-length cable including a plurality of conducting wires and a plurality of unit feeder lines connected in series with connectors at both ends. And a connection module that connects the two conductors of the unit feeders to each other to form one conductor, and connects both ends of the conductor to the high-frequency output terminal of the high-frequency power source. Contact power supply device. The load, the magnetic core, the secondary winding, and the power receiving unit are mounted on a moving body,
The non-contact power feeding apparatus according to claim 1, wherein the power feeding line is laid along a moving direction of the moving body. The high frequency power supply is
A rectifier that rectifies AC power supplied from the AC power source into direct current, a smoothing circuit that smoothes direct current rectified by the rectifier, an inverter that converts direct current smoothed by the smoothing circuit into single-phase high-frequency power, and An inverter control unit that controls the output frequency and output voltage of the inverter, and a step-down transformer that converts the single-phase high-frequency voltage output from the inverter into a low-frequency high-frequency current and outputs the low-frequency high-frequency current to the high-frequency output terminal. The non-contact electric power feeder of Claim 1 or 2 characterized by the above-mentioned.   4. The non-contact power feeding apparatus according to claim 3, wherein a low-pass filter for removing a harmonic component contained in a high-frequency electric voltage output from the inverter is inserted between the inverter and the step-down transformer.   4. A non-contact filter according to claim 3, wherein a low-pass filter for removing harmonic components contained in the low-frequency high-frequency current output from the step-down transformer is inserted between the step-down transformer and the high-frequency output terminal. Power supply device.   A capacitor that compensates for a voltage drop due to an inductance component caused by the winding of the one conducting wire is inserted in series with the one conducting wire connected and configured by the connection module. The non-contact electric power feeder of any one of Claim 1 to 5. The power receiving unit
A rectifier for rectifying the AC voltage induced in the secondary winding;
A load voltage detector for detecting a load voltage of the load;
A PWM controller that outputs a PWM signal corresponding to an error voltage between the load voltage detected by the load voltage detector and the constant voltage;
A switching element that is controlled to be turned on / off by the PWM signal, and a voltage control unit that controls a DC voltage output from the rectifier and supplied to the load;
The contactless power feeding device according to claim 1, further comprising a filter that removes harmonic components contained in a DC voltage that is voltage-controlled by the voltage control unit and is supplied to the load. .

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