JP3371729B2 - Contactless power supply equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power supply system. 2. Description of the Related Art In a conventional non-contact power supply system for a mobile body, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-251704, a magnetic flux generated from an induction line through which a high-frequency current flows causes metal to be swirled. Electric current flows, the metal generates heat,
There is equipment configured to avoid the danger of the induction line being heated by the heat and burning to cause a fire. In this facility, an optical fiber cable is laid along a guide line, a light emitting section and a light receiving section are connected to both ends of the optical fiber cable, and the light receiving section detects an optical attenuation rate, and the optical attenuation rate is a predetermined attenuation rate. A detection circuit that outputs an alarm when the above occurs is connected, and the high-frequency current is cut off by the alarm output of the detection circuit. [0003] However, in an optical fiber cable used for such a non-contact power supply equipment,
By suppressing or bending, there is a problem that the transmission amount is reduced, the detection distance is shortened, the operation is not performed, and there is a problem that connection is difficult and construction is difficult. [0004] The present invention is to solve the above problems,
The object of the present invention is to provide a non-contact power supply equipment capable of detecting heat generation in the vicinity of an induction line and preventing a fire without being affected by bending, easy to construct, and without generating heat due to magnetic flux generated by the induction line. It is assumed that. [0005] In order to solve the above problems,
The contactless power supply equipment of the present invention has an induction line for flowing a high-frequency current along a moving line of a moving body, a coil provided with power from the dielectric line in a non-contact manner on the moving body, a contactless power feeding apparatus for feeding a contact, non-magnetic
On a conductor consisting of a body of phosphor bronze round wire , an insulator softening at a predetermined temperature is coated, and a pair of conductors coated with the insulator are coated.
A twisted , flexible bendable heat-sensitive wire is laid along the guide line, and when the ambient temperature is equal to or higher than the predetermined temperature, the insulator of the heat-sensitive wire softens and the conductor is short-circuited. The high frequency current is cut off. [0006] According to the above configuration, the insulator is softened and the conductor is short-circuited, so that the presence of the heating element near the induction line is detected. Thus, the induction line is heated, burns, and a fire is prevented from occurring. Also, since the heat-sensitive wire is formed by a non-magnetic phosphor bronze round wire that does not generate heat due to the electromagnetic induction of the induction line, it is not affected by the electromagnetic induction from the induction line, and there is no self-heating. The construction is easy without being affected by bending. [0008] Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a side view of a main part of the contactless power supply equipment according to the embodiment of the present invention, and FIG. 6 is a partial cross-sectional front view of the same contactless power supply equipment. A vehicle body V as a moving body includes a driving trolley 1A, a driven trolley 1B, and these trolleys 1A and 1B.
And a guide rail B for movably guiding the vehicle body V. The drive trolley 1A includes a traveling wheel 2 engaged with an upper portion of a guide rail B, a steady roller 3 contacting a lower portion of the guide rail B from both lateral sides, and a pickup unit P described later. The wheels 2 are driven by an electric motor 4 with a reduction gear. The driven trolley 1B includes a traveling wheel 5 that engages with the upper part of the guide rail B, and a steadying roller 6 that contacts the lower part of the guide rail B from both sides. The guide rail B has a wheel guide 7 at its upper part and a roller guide 8 at its lower part. The guide rail B is suspended from a ceiling or the like by a support frame 9 connected to one lateral side. A guide line unit X to be described later is provided on the other side of the guide rail B on which the support frame 9 is attached.
Is attached. Further, a power supply device M described later is provided. The guide line unit X has a pair of upper and lower hangers 11 vertically protruding from one side of the guide rail B along the guide rail B as shown in an enlarged view in FIG. At the tip, a bracket 13 provided integrally with the hanger 11, the tip of which is open, and provided with a ring-shaped locking portion 12 that is flexible and maintains a predetermined shape is arranged at predetermined intervals,
Induction line 14, and heat-sensitive wire clamped to induction line 14
15 is fitted into the locking portion 12 of the hanger 11. The bracket 13 is attached to the guide rail B by a metal fitting made of the same material as the guide rail B, for example, a screw 16 made of aluminum. The guide line 14 is formed by using a twisted wire (hereinafter referred to as a litz wire) formed by collecting insulated thin wires, as an insulator.
For example, it is configured by coating with a resin material such as vinyl chloride. As shown in FIG. 2, the heat-sensitive wire 15
A conductor 17 made of a non-magnetic phosphor bronze round wire is coated with an insulator 18 made of heat-sensitive thermoplastic, and a pair of conductors 17 coated with the insulator 18 are twisted, and a tape 19 is placed thereon. And a sheath 20. When the ambient temperature reaches a certain temperature, the heat-sensitive wire 15
Is softened, and the twisted pair of conducting wires 17 is short-circuited by a spring action. As shown in FIG. 6, the pickup unit P comprises a pickup coil 22 formed by winding the litz wire of 10 to 20 turns around a ferrite 21 having an E-shaped cross section. twenty one
The center of the convex portion is adjusted to be substantially perpendicular to the guide rail B at the center of the pair of guide lines 14 of the guide line unit X, and is fixed to the vehicle body V. Guidance line
When the power is supplied (AC) to the motor 14, an electromotive force is generated in the pickup coil 22, and the electromotive force is supplied to the electric motor 4 via a rectifier circuit, a constant voltage circuit, and an inverter (all not shown). . As shown in FIG. 3, the power supply device M includes a high-frequency generation circuit 24 for supplying a high-frequency current to the induction line 14, and a protection device 25 connected to the heat-sensitive wire 15. As shown in FIG. 3, the guide line 14 is laid via relay terminals 26, and a thermo label 27 that changes color when the ambient temperature exceeds a certain temperature is attached to the relay terminals 26. . A thermo label 27 is also attached to the pickup coil 22. FIG. 4 shows a circuit of the protection device 25 and the heat-sensitive wire 15. A non-magnetic resistor 31 is connected in series to the one conductor 17 of the heat-sensitive wire 15 at predetermined intervals, and a test switch 32 composed of a push-button switch that is normally open is provided at the end. Further, a DC power supply 33 is connected to the pair of conductors 17, and as means for detecting that the conductor 17 is short-circuited, that is, means for detecting a current flowing through the conductor 17,
, A detection resistor 34 connected in series with the resistor 34 and a meter relay 35 connected in parallel with the resistor 34 are provided. The detection contact 35A of the meter relay 35 is set to operate with the minimum current flowing when a short-circuit state is formed by the test switch 32. Further, since the value of the current flowing through the conductive wire 17 varies depending on the short-circuit point, the position of the short-circuit point can be found by looking at the display of the meter of the meter relay 35. The detection contact 35A of the meter relay 35 is connected to the high-frequency generation circuit 21. When the detection contact 35A operates, the high-frequency generation circuit 24 cuts off the high-frequency current. The operation of the above circuit configuration will be described. First, from the DC power supply 33 of the protection device 25,
With voltage applied to conductor 17 of 15,
32 is pressed, the current value at that time is confirmed by the display of the meter of the meter relay 35, and the detection contact 35A is set to operate at this current value. Then, a high-frequency current is supplied from the high-frequency generation circuit 24 to the induction line 14. The magnetic flux generated in the guide line 14 generates a large electromotive force in the pickup coil 22 of the vehicle body V located on the guide rail B, and the alternating current generated by the electromotive force is rectified and regulated to a predetermined voltage. The vehicle body V of the moving body is supplied to the electric motor 4 with a speed reducer via the inverter, and the traveling wheels 2 are driven by the supplied motor 4 to be guided and moved by the guide rail B. If a metal such as an iron tool is erroneously placed in the vicinity of the guide line 14, an eddy current flows through the metal due to the magnetic flux generated by the guide line 14, and the metal generates heat. The heating wire 15 is heated, e.g.
When the temperature reaches 0 ° C., the insulator 18 softens, and the twisted pair of conductors 17 is short-circuited by a spring action.
35A operates, and the operation of the detection contact 35A causes the high frequency generating circuit 24 to cut off the supplied high frequency current. Therefore, the metal does not generate any more heat, and cools down, so that the heat generated by the metal heats the induction line 14 and burns,
A fire is prevented from occurring. Also meter relay 35
By checking the current value displayed in the above, the short-circuit point of the conductive wire 17 can be found. Further, by monitoring the colors of the thermolabel 27 attached to the relay terminal 26 and the pickup coil 22, it is possible to confirm whether or not the ambient temperature has exceeded a predetermined temperature. As described above, the power can be efficiently supplied to the vehicle body V without contact, and even if a metal such as an iron tool is erroneously mounted near the guide line 14, the heat generated by the metal can be reduced. By detecting using the heat-sensitive wire 15 and cutting off the high-frequency current flowing through the induction line 14, the induction line 14
Can prevent fire accidents in which the stainless steel is heated and burnt, and can prevent rust on stainless steel due to the gas generated by the burning of the vinyl chloride that forms the coating of the guide line 14, which is safe even in a clean room. Contact power supply equipment can be used. Also, meter relay 35
By checking the current value displayed in the above, the short-circuit point of the conductor 17 can be found, that is, the place where a fire may have occurred can be specified, and therefore, a metal such as an iron tool can be quickly located in the vicinity. It is possible to investigate whether or not it is placed on the device and eliminate the cause. As a result, the time required for restoration can be shortened, and the decrease in the actual working time can be suppressed. The heat-sensitive wire 15 can be bent easily and easily connected, so that it can be easily constructed, the time for laying work can be shortened, and the hanger 11 which is a support for the guide line 14 is connected to the guide line 14. Since it can be laid together with 14, no additional support is required, and the cost of equipment can be reduced. Further, the cost of the heat-sensitive wire 15 itself is low, and the cost of the equipment can be suppressed. In the present embodiment, the induction line 14 and the heat-sensitive wire 15 are used as the respective lines.
It is also possible to use a guide line in which 15 is embedded. With this configuration, the installation work can be facilitated. In the present embodiment, the conductor of the heat-sensitive wire 15
Although the meter relay 35 is used as the short-circuit detecting means of the circuit 17, any structure capable of detecting the current of the conductor 17 and outputting a current cutoff signal to the high-frequency generating circuit 24 may be used. For example, it is possible to connect a current detector to the conducting wire 17, input the detected current value to a computer, check the presence or absence of a current with the computer, and output a current cutoff signal to the high frequency generation circuit 24. Further, a heat generation position can be specified and output from the detected current value by a calculation based on the resistance value of the resistor 31 by a computer. As described above, according to the present invention , the softening of the insulator and the short-circuiting of the conductor lead to the detection of the presence of the heating element near the induction line. By interrupting the high-frequency current, the induction line is heated by the heat of the heating element, and it can be prevented from burning and causing a fire.Furthermore, the gas generated by the burning of vinyl chloride, which is the coating of the normal induction line, The generation of rust on stainless steel can be prevented, and the contactless power supply equipment can be used safely even in a clean room. In addition, since the heat-sensitive wire is formed by a conductor made of a non-magnetic phosphor bronze round wire that does not generate heat due to the electromagnetic induction of the induction line, it is not affected by the electromagnetic induction from the induction line and does not generate heat. In addition, the heat sensing wire is flexible and easy to connect, so it is easy to install, shortening the installation work time, can be installed together with the guide line, and does not require additional support Therefore, the cost of the equipment can be reduced. [0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a bracket of a wireless power supply system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view and a side view of a heat-sensitive wire of the contactless power supply equipment. FIG. 3 is a main part circuit configuration diagram of the contactless power supply equipment. FIG. 4 is a configuration diagram of a protection circuit of the contactless power supply equipment. FIG. 5 is a side view of a main part of the contactless power supply equipment. FIG. 6 is a partial cross-sectional front view of the contactless power supply equipment. [Description of Signs] V Car body (moving body) B Guide rail (moving line) X Guidance line unit P Pickup unit M Power supply unit 11 Hanger 12 Locking unit 13 Bracket 14 Guidance line 15 Heat sensitive wire 17 Conducting wire 18 Insulator 21 Ferrite 22 Pickup coil 24 High frequency generator 25 Protection device 26 Relay terminal 27 Thermo label 31 Resistance 32 Test switch 33 DC power supply 34 Detection resistor 35 Meter relay 35A Meter relay detection contact

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-8-251704 (JP, A) JP-A-54-66474 (JP, A) JP-A-2-114899 (JP, A) JP-A 8- 96630 (JP, A) Japanese Utility Model Showa 59-12210 (JP, U) Japanese Patent Publication No. 32-5647 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 5/00 B60M 7 / 00 B65G 43/00 H01B 7/00 G08B 17/00

Claims (1)

(57) [Claim 1] An induction line for flowing a high-frequency current is laid along a moving line of a moving body, and a coil to which power is supplied from the dielectric line without contact is provided on the moving body. A non-contact power supply facility for supplying power to a moving body in a non-contact manner, wherein a conductor made of a nonmagnetic phosphor bronze round wire is coated with an insulator that softens at a predetermined temperature, and a pair of the insulator is coated.
A flexible heat-sensitive wire formed by twisting conductors ,
The high-frequency current is cut off when the insulation of the heat-sensitive wire is softened when the ambient temperature is equal to or higher than the predetermined temperature and the conductor is short-circuited. Contact power supply equipment.