JP5288819B2 - AC power cable with noise filter - Google Patents

Description

  The present invention relates to an AC power cable with a noise filter in which an inductance element is housed in an outlet body in a power cord mainly used for power supply from an AC line (AC line) of an electronic device and a noise filter function is added. .

  The current AC power cable with a noise filter mainly contains a common mode choke coil as an inductance element in the plug body, which is composed of a first coated conductor and a second coated conductor. The power cord includes a first coated conductor and a second coated conductor, and includes a first coated conductor, a first inserted blade, and a power cord of the inductance element. The first coated conductor is electrically connected, the second coated conductor of the inductance element, the second insertion blade, and the second coated conductor of the power cord are electrically connected, and the inductance element It has the performance of suppressing noise conducted and radiated from the equipment by the impedance component it has.

  In order to eliminate the adverse effect of the coil line-to-line capacitance on noise suppression when the inductance element is used in a high frequency region, the magnetic core is grounded and the coil is directly wound around the grounded magnetic core. A technique for forming a film has been proposed (see, for example, Patent Document 1 and Patent Document 2).

  On the other hand, the dielectric strength and the adjacent conductor are sequentially formed on the magnetic core on which the ground conductor is formed, and the coated conductor is wound on the magnetic core in which the withstand voltage of the coated conductor is a problem. In addition, there has been proposed a device in which the magnetic core and the coated conductor are separated, thereby improving the reliability (see Patent Document 3).

JP 9-102426 A JP 2004-31866 A JP 2004-235709 A

  However, if the magnetic core is grounded, there is a problem that the degree of freedom in design is low, for example, it is difficult to adjust the capacitance value. In addition, due to its structural characteristics, there is a problem that the manufacturing process is difficult and requires a lot of man-hours.

  In addition, there is a limit to the space in which the inductance element can be accommodated due to the restricted size of the plug body, and the size of the inductance element is inevitably limited, and the absolute amount of the impedance component cannot be increased too much. In addition, since the winding capacity of the inductance element degrades the high-frequency characteristics of the inductance element, suppression of noise transmitted and radiated from the equipment can be achieved simply by using an AC power cable with a noise filter that houses the inductance element in the plug body. Has the disadvantage of being insufficient.

  Therefore, an object of the present invention is to provide an AC power cable with a noise filter that uses an inductance element having a new structure that is relatively easy to manufacture and has an excellent noise suppression effect.

According to the present invention, the first AC power cable with a noise filter includes a toroidal magnetic core, an insulator that covers the entire magnetic core, and a coated conductor , and the magnetic core and the insulator are wound around the magnetic core . comprising a coil made Te, a dielectric provided in come in contact with at least a portion of the outside of the coil, disposed outside of the dielectric, and a conductor forming the coil and the dielectric and capacitor and the inductance element an AC power cable with noise filter housed in the outlet body, the object to be covered conductor is electrically connected between the outlet and the power cord, before the ground is connected to Kishirube collector terminal Electrically connected to either terminal of a three-pole outlet or a ground pole of a two-pole outlet, the outlet body is a three-pole outlet Komata intended having an outlet terminal and the ground pole of the bipolar, the cord and the AC power cable with noise filter, characterized in that the outlet body is integrated is obtained.
Further, according to the present invention, as the second AC power cable with a noise filter, a toroidal magnetic core, an insulator covering the whole of the magnetic core, a conductor provided outside the insulator, A conductor provided on the outside of the conductor; and a coil comprising a coated conductor, the magnetic core, the insulator, the conductor, and the coil wound around the conductor, the conductor, the dielectric And an AC power cable with a noise filter in which an inductance element forming a capacitor with the coil is housed in an outlet body, wherein the coated conductor is electrically connected between the outlet and the power cord and connected to the conductor The ground terminal is electrically connected to one of the terminals of the three-pole outlet or the ground pole of the two-pole outlet, and the outlet body A noise filter with AC power cables, characterized in that the outlet body and the power cord that has an outlet terminal and the ground pole of the tripolar outlet terminal or bipolar are integrated is obtained.
The power cord and the outlet body may be integrally formed and integrated.

Furthermore, according to the present invention, as the third AC power cable with a noise filter, in the first or second AC power cable with a noise filter, at least the insulator is provided between the magnetic core and the conductor. By being interposed, an AC power cable with a noise filter in which the magnetic core and the conductor are electrically insulated can be obtained.

Further, according to the present invention, as a fourth noise AC power cable with filter, in any one of the first to third noise AC power cable with filter, the dielectric noise you have a predetermined thickness An AC power cable with a filter is obtained.

Further, according to the present invention, as a fifth noise AC power cable with filter, in the AC power cable with a first noise filter, before Symbol coated conductive wire is made by incorporating the magnetic core to said insulator integrants An AC power cable with a noise filter wound around is obtained.

Further, according to the present invention, as the sixth AC power cable with a noise filter, in the first AC power cable with a noise filter, the dielectric is formed of an enveloping member configured to cover the outer periphery of the coil. becomes, AC power cable is obtained with the noise filter that has over at least a portion of the outer peripheral side of the coil.

  Furthermore, according to the present invention, as the seventh AC power cable with a noise filter, in any one of the first to sixth AC power cables with a noise filter, the dielectric is provided with an adhesive layer on one side or both sides. An AC power cable with a noise filter made of a sheet or insulating tape is obtained.

  Further, according to the present invention, as the eighth noise power supply AC power cable, in any one of the first to seventh noise power supply AC power cables, the dielectric is made of a silicone resin sheet or a fluororesin sheet. An AC power cable with a noise filter is obtained.

  Furthermore, according to the present invention, as the ninth AC power cable with a noise filter, in any one of the first to eighth AC power cables with a noise filter, the conductor is an AC with a noise filter that is a foil conductor. A power cable is obtained.

  Furthermore, according to the present invention, as the tenth AC power cable with a noise filter, in the ninth AC power cable with a noise filter, the foil-like conductor is metal-plated, metal-deposited or metal-sputtered on the dielectric. Thus, an AC power cable with a noise filter that is formed by applying a conductive paint is obtained.

  Furthermore, according to the present invention, as the eleventh AC power cable with a noise filter, in the ninth AC power cable with a noise filter, the foil conductor is bonded to the dielectric on the AC with the noise filter. A power cable is obtained.

Further, according to the present invention, a twelfth noise AC power cable with filter, a magnetic core, the conductor and the body, which is provided spaced from the magnetic core, the magnetic core and capable insulator holding said conductor A dielectric made of a mold and a coil made of a coated conductor and wound on the dielectric, and an inductance element forming a capacitor with the conductor, the dielectric and the coil is housed in the outlet body AC power cable with noise filter, wherein the coated conductor is electrically connected between an outlet and a power cord, and the ground terminal connected to the conductor is either a terminal of a three-pole outlet or a two-pole The outlet body is electrically connected to the ground pole of the outlet, and the outlet body is a three-pole outlet terminal or a two-pole outlet terminal Noise filter on AC power cable wherein the outlet body and the power cord that has a grounding electrode are integrated is obtained.

  Furthermore, according to the present invention, as the thirteenth AC power cable with a noise filter, in the twelfth AC power cable with a noise filter, the dielectric includes the conductor and is located away from the conductor. Thus, an AC power cable with a noise filter formed so as to have a core housing portion for housing the magnetic core is obtained.

  Furthermore, according to the present invention, as the fourteenth AC power cable with noise filter, in the twelfth or thirteenth AC power cable with noise filter, the magnetic core is a toroidal core, and the dielectric is a toroidal shape. The coated conductor is wound around the dielectric, and an AC power cable with a noise filter constituting the coil is obtained.

  Furthermore, according to the present invention, in the fourteenth AC power cable with noise filter as the fifteenth AC power cable with noise filter, the conductor is located closer to the outer peripheral side surface of the dielectric than the magnetic core. The provided AC power cable with a noise filter is obtained.

  Furthermore, according to the present invention, in the fourteenth AC power cable with noise filter as the sixteenth AC power cable with noise filter, the conductor is located closer to the inner peripheral side surface of the dielectric than the magnetic core. An AC power cable with a noise filter provided in is obtained.

  Furthermore, according to the present invention, as the seventeenth AC power cable with a noise filter, any one of the first to sixteenth AC power cables with a noise filter further includes a ground terminal connected to the conductor. An AC power cable with a noise filter is obtained.

  Furthermore, according to the present invention, as the eighteenth AC power cable with a noise filter, in any one of the first to seventeenth AC power cables with a noise filter, the magnetic core has a noise filter having a permeability of 10,000 or more. AC power cable is obtained.

  Furthermore, according to the present invention, an AC power cable with a noise filter including any one of the first to 18th AC power cables with a noise filter is obtained.

  According to the present invention, the AC power cord with the second noise filter includes the first coated conductor and the second coated conductor, and further has a ground terminal, and the outlet body includes the first terminal and the first coated conductor. Two power terminals and a third terminal or a ground electrode, and the power cord includes a first coated conductor, a second coated conductor, and a third coated conductor, and the first coated conductor and the first coated conductor of the inductance element The terminal and the first coated conductor of the power cord are electrically connected; the second coated conductor of the inductance element; the second terminal; and the second coated conductor of the power cord are electrically connected; An AC power cable with a noise filter is obtained in which the ground terminal and the third terminal of the inductance element or the earth electrode and the third coated conductor of the power cord are electrically connected.

  According to the present invention, an inductance element having a high degree of freedom in setting and having high electrical reliability can be obtained, and an AC power cable with a noise filter is configured using the inductance element according to the present invention. The attenuation characteristic can be widened to the high frequency side.

  Some noise filters include a capacitor element (Across the Line Capacitor; X-con) for removing normal mode noise and a capacitor element (Line Bypass Capacitor; Y-con) for removing common mode noise. . Here, the normal mode noise indicates noise generated between the input lines of the noise filter. On the other hand, common mode noise refers to noise generated between a reference potential different from that between the input lines of the noise filter.

  When an AC power cable with a noise filter using the inductance element of the present invention is used, noise removal can be optimized even if the Y-con is omitted. That is, according to the present invention, a desired attenuation characteristic can be obtained while reducing the leakage current caused by the Y-con.

  In addition, since a capacitor having a sufficient capacity by the conductor can be used as a load for the inductor, a filter can be configured by an inductance element alone. This does not limit the construction of an AC power cable with a noise filter by combining the inductance element and the capacitor according to the present invention.

  In addition, according to the present invention, there is a limit to the space in which the inductance element can be accommodated due to the restricted size of the plug body, and the inductance element is inevitably changed into the plug body where the size of the inductance element is also limited. Can be increased to some extent, and at the same time, by using an inductance element with a new structure, a capacitance component is formed between the ground and sufficient attenuation can be obtained even in the high frequency band. It can have sufficient characteristics to suppress conducted and radiated noise. In addition, the structure itself is not so difficult to manufacture as compared to a conventional inductance element, and is not difficult to manufacture compared to a configuration that requires grounding of a conventional magnetic core.

  Furthermore, since the capacitance component of the inductance element of the new structure is connected to the terminal of the ground electrode of the outlet body, it is possible to suppress conduction noise and radiation noise on the front line of the electronic device, which is a noise of the conventional electronic device. It also has an effect that the noise of the propagation path transmitted over the filter circuit can be easily removed.

  Furthermore, since the capacitance component of the inductance element of the new structure is connected to the terminal of the ground electrode of the outlet body, it can be grounded to the ground on the front line of the electronic equipment, and the ground resistance can be reduced to the limit. Since it can be realized, the maximum effect can be obtained in suppressing conduction noise and radiation noise of electronic equipment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. An inductance element used for an AC power cable with a noise filter in the embodiment described below is for a common mode and includes two covered conductors, but the present invention is not limited to this. However, the present invention can be applied to a normal mode inductance element using only one coated conductor.

(First embodiment)
As shown in FIGS. 1 to 3, the inductance element 14a used in the AC power cable with the noise filter according to the first embodiment of the present invention covers the toroidal magnetic core 15a and the entire magnetic core 15a. An insulating case 16a, a coil formed by winding the coated conductors 17 and 18 around an assembly formed by incorporating the magnetic core 15a in the insulating case 16a, a ring-shaped dielectric 22 covering the outer periphery of the coil, By sandwiching the dielectric 22 with the coil (covered conductors 17 and 18), the coil (covered conductors 17 and 18), a foil-like conductor 23a that forms the capacitor with the dielectric 22, and the ground terminal 21 drawn from the foil-like conductor 23a. It has. As is apparent from FIG. 1, in the present embodiment, the insulating case 16a, the coils (coating conductors 17 and 18), and the dielectric 22 are interposed between the magnetic core 15a and the foil conductor 23a. Thereby, the magnetic core 15a and the foil-like conductor 23a are electrically insulated.

  The magnetic core 15a in the present embodiment has an initial permeability of about 10,000. Since the initial magnetic permeability of a general magnetic material is about 5000, the magnetic permeability of the magnetic material used in this embodiment is about twice that. Thus, when a high magnetic permeability material is used, the volume can be reduced without deteriorating the attenuation characteristics. Note that a general magnetic material may be used when miniaturization is not the main purpose.

  The covered conducting wires 17 and 18 are made of, for example, a urethane wire or an enameled wire. The lead portions of the coated conductors 17 and 18 are actually drawn at regular intervals as shown in FIG. 3, but in FIG. 1, the intervals are somewhat shifted for easy understanding. It is shown.

  As shown in the figure, the dielectric 22 in the present embodiment is a ring having a predetermined thickness. For example, the dielectric 22 may be a partially cut C-shape or another shape. Often. Further, a thinner insulating sheet or insulating tape may be used. In the case of an insulating sheet, an adhesive layer may be provided on one side of the sheet for adhesion to the coil outer peripheral side portion, or the insulating sheet may be attached to the coil outer peripheral side with an adhesive during production.

  The foil-like conductor 23 a in the present embodiment is formed by sputtering copper on a part of the outer peripheral surface of the dielectric 22. The foil-like conductor 23a may be, for example, an aluminum foil, a silver foil or a gold foil, or an alloy foil containing these metals instead of the copper foil. The foil-like conductor 23a may be formed by metal plating or metal vapor deposition instead of sputtering, or may be formed by applying a conductive paint on the dielectric 22. In addition, a separately formed foil-like conductor 23 a may be pasted on the dielectric 22. The foil-like conductor 23a may cover not only a part on the outer peripheral surface but also the entire outer peripheral surface. As long as a sufficiently large capacitor can be formed with the covered conductors 17 and 18, a conductor having another shape may be used instead of the foil conductor 23a.

  Note that the location, area, and the like of the covered conductors 17 and 18 covered by the foil conductor 23a depend on the number of turns (number of turns), thickness, and length of the covered conductors 17 and 18, the size of the magnetic core 15a, material characteristics, and the like. It can be changed as appropriate.

  As shown in FIGS. 1 to 3, only one ground terminal 21 in the present embodiment is provided at a portion that is the same distance from both lead portions of the covered conductors 17 and 18. For example, FIG. As shown in FIG. 4, two may be provided, or the interval between the ground terminals 21 may be made larger than that of the covered conductors 17 and 18.

  When the ground terminal 21 is grounded and used for the inductance element 14a used in the AC power cable with the noise filter having such a configuration, the attenuation characteristic is not deteriorated even in a high frequency band, and it is excellent over a relatively wide frequency range. Attenuation characteristics can be obtained.

  In particular, in the present embodiment, the foil-like conductor 23a is provided on the outer side in the radial direction than the toroidal magnetic core 15a. For this reason, the area of the foil-like conductor 23a can be made larger than the outer periphery of the magnetic core 15a. Therefore, compared with the prior art in which the magnetic core 15a is directly grounded, the capacitor added to the covered conductors 17 and 18 can be obtained. The capacity can be increased.

(Second Embodiment)
As shown in FIGS. 5 to 7, the inductance element 14a ′ used in the AC power cable with a noise filter according to the second embodiment of the present invention is the power cable with the noise filter according to the first embodiment described above. Therefore, in the following, only the different parts will be described, and the component having the same configuration as the inductance element used in the power cable with the noise filter according to the first embodiment will be described below. 5 to FIG. 7, the same reference numerals as those used in FIG. 1 to FIG.

  As shown in FIGS. 5 to 7, the inductance element 14a ′ used in the AC power cable with the noise filter in the present embodiment includes the foil-like conductors 23b and 23b ′ divided into two, respectively. The covering conductor 17 and the covering conductor 18 are provided. Thus, as a result of dividing the foil-like conductors 23b and 23b 'into two, a pair of ground terminals 21 are also provided.

(Third embodiment)
As shown in FIGS. 8 to 10, the inductance element 14 a ″ used in the AC power cable with noise filter according to the third embodiment of the present invention is also the power source with noise filter according to the first embodiment. This is a modification of the inductance element 14a used in the cable. Therefore, only the different parts will be described below, and it has the same configuration as the inductance element used in the AC power cable with noise filter according to the first embodiment. Constituent elements in FIG. 8 to FIG. 10 are given the same reference numerals as those used in FIG. 1 to FIG.

  As shown in FIGS. 8 to 10, the inductance element 14 a ″ used in the AC power cable with the noise filter in the present embodiment covers a portion of the dielectric 22 except for the vicinity of the lead portions of the covered conductors 17 and 18. A foil-like conductor 23c is provided as described above, and a pair of ground terminals 21 are also provided.

(Fourth embodiment)
As shown in FIGS. 11 to 13, the inductance element 14b used in the AC power cable with the noise filter according to the fourth embodiment of the present invention covers the toroidal magnetic core 15b and the entire magnetic core 15b. The insulating case 16b, a C-shaped foil-like conductor 23d provided outside the insulating case 16b, a dielectric 22 provided outside the foil-like conductor 23d, and a foil through a hole provided in the dielectric 22 A ground terminal 21 drawn out from the conductor 23d and a coil (coated conductors 17 and 18) are provided. The coated conducting wires 17 and 18 in the present embodiment are wound around the magnetic core 15b, the insulating case 16b, the foil-like conductor 23d, and the dielectric 22 to form coils. In the following, only parts different from the first embodiment will be described, and components having the same configuration as that of the inductance element used in the AC power cable with noise filter according to the first embodiment will be described with reference to FIG. In FIG. 13 to FIG. 13, the same reference numerals as those used in FIG. 1 to FIG.

  In the present embodiment, a capacitor is formed by interposing the dielectric 22 between the foil-like conductor 23d and the coil (the coated conducting wires 17 and 18). On the other hand, as is apparent from FIG. 11, the magnetic core 15b And the foil-like conductor 23d are electrically insulated by providing an insulating case 16b.

  As shown in FIGS. 11 to 13, only one ground terminal 21 in the present embodiment is provided at a portion having the same distance from the lead portions of the covered conductive wires 17 and 18. As shown in FIG. 14, two may be provided, or the interval between the ground terminals 21 may be made larger than that of the covered conductors 17 and 18.

(Fifth embodiment)
As shown in FIGS. 15 to 18, an inductance element 14c used in an AC power cable with a noise filter according to a fifth embodiment of the present invention includes a toroidal magnetic core 15c and a thin plate shape having a C-shape. A conductor 24a, a dielectric 16c having a toroidal appearance and made of an insulating mold that holds the magnetic core 15c and the thin plate conductor 24a apart from each other, and the coated conductors 17 and 18 are wound around the dielectric 16c. A rotating coil and a ground terminal 21 drawn from the thin plate conductor 24a through a hole provided in the dielectric 16c are provided. In the following, only the parts different from the first embodiment will be described, and components having the same configuration as the inductance element used in the AC power cable with noise filter according to the first embodiment will be described with reference to FIGS. In FIG. 18, the same reference numerals as those used in FIGS. 1 to 3 are given, and the description thereof is omitted.

  In the present embodiment, a capacitor is formed by interposing a dielectric 16c between the thin plate conductor 24a and the coil (covered conductive wires 17 and 18). As is apparent from FIGS. 15 and 18, The magnetic core 15c and the thin plate conductor 24a are also electrically insulated by the dielectric 16c.

  As shown in FIG. 18, the dielectric 16c in the present embodiment includes a main portion 16c1 and a lid portion 16c2. A thin plate-like conductor 24a embedded at the time of molding is held from the outer peripheral side surface 16c4 of the main portion 16c1, and a donut-shaped concave portion constituting the core housing portion 16c3 is formed from the inner peripheral side surface 16c5 of the main portion 16c1. Has been. As is clear from this, in the present embodiment, the thin plate conductor 24a is provided at a position closer to the outer peripheral side surface 16c4 of the dielectric 16c than to the magnetic core 15c. For this reason, the area of the thin plate-like conductor 24a can be increased, and accordingly, the capacitance of the capacitor added to the coated conductors 17 and 18 can be increased. Note that the location, area, and the like of the thin plate-like conductor 24a facing the coated conductors 17 and 18 are the number of turns (number of turns), thickness, and length of the coated conductors 17 and 18, the size of the magnetic core 15c, material characteristics, and the like. Can be changed as appropriate.

  As shown in FIGS. 15 to 17, only one ground terminal 21 in the present embodiment is provided at a portion that is the same distance from the lead portions of the covered conductive wires 17 and 18. As in the case of the embodiment, for example, as shown in FIG. 4, two may be provided, or the interval between the ground terminals 21 may be made larger than that of the covered conductors 17 and 18.

(Sixth embodiment)
As shown in FIGS. 19 to 22, the inductance element 14c ′ used in the AC power cable with the noise filter according to the sixth embodiment of the present invention is a modification of the inductance element 14c according to the fifth embodiment. Therefore, in the following description, only different parts will be described, and components having the same configuration as that of the inductance element used in the power cable with a noise filter according to the fifth embodiment will be described with reference to FIGS. 15 to 18, the same reference numerals as those used in FIG. 15 to FIG.

  As shown in FIGS. 19 to 21, the inductance element 14c ′ used in the AC power cable with the noise filter in the present embodiment includes thin plate conductors 24b and 24b ′ divided into two, respectively. The covering conductor 17 and the covering conductor 18 are provided. Thus, as a result of dividing the thin plate conductors 24b and 24b 'into two, a pair of ground terminals 21 are also provided.

  As shown in FIG. 22, the dielectric 16 c ′ in the present embodiment includes a main portion 16 c ′ 1 and a lid portion 16 c ′ 2. Thin plate-like conductors 24b and 24b ′ embedded during molding are held from the outer peripheral side surface 16c′4 of the main portion 16c′1, and the core is accommodated from the inner peripheral side surface 16c′5 of the main portion 16c′1. A donut-shaped concave portion constituting the portion 16c'3 is formed. As is clear from this, in the present embodiment, the thin plate conductors 24b and 24b 'are provided closer to the outer peripheral side surface 16c'4 of the dielectric 16c' than the magnetic core 15c.

(Seventh embodiment)
As shown in FIGS. 23 to 26, the inductance element 14 c ″ used in the AC power cable with noise filter according to the seventh embodiment of the present invention is also the power source with noise filter according to the fifth embodiment described above. This is a modification of the inductance element 14c used in the cable. Therefore, only the different parts will be described below, and the same configuration as the inductance element used in the AC power cable with noise filter according to the fifth embodiment is provided. The constituent elements in FIGS. 23 to 26 are denoted by the same reference numerals as those used in FIGS. 15 to 18, and the description thereof will be omitted.

  As shown in FIGS. 23 to 25, the inductance element 14 c ″ in the present embodiment includes a thin plate-like conductor 24 c having a C-shaped cross section that is open on the lead portion side of the coated conducting wires 17 and 18. A pair of ground terminals 21 is also provided.

  As shown in FIG. 26, the dielectric 16c ″ in the present embodiment is composed of a main portion 16c ″ 1 and a lid portion 16c ″ 2. A mold is formed rather than the outer peripheral side surface 16c ″ 4 of the main portion 16c ″ 1. A thin plate-like conductor 24c embedded at times is held, and a donut-shaped concave portion constituting the core housing portion 16c ″ 3 is formed from the inner peripheral side surface 16c ″ 5 of the main portion 16c ″ 1. As is clear from this, also in the present embodiment, the thin plate-like conductor 24c is provided at a position closer to the outer peripheral side surface 16c ″ 4 of the dielectric 16c ″ than the magnetic core 15c.

(Eighth embodiment)
As shown in FIGS. 27 to 30, an inductance element 14d used in an AC power cable with a noise filter according to an eighth embodiment of the present invention has a toroidal magnetic core 15d and a thin plate shape having a C shape. A conductor 25a, a dielectric 16d that has a toroidal appearance and is formed of an insulator mold that holds the magnetic core 15d and the thin plate-like conductor 25a apart from each other, and coated conductors 17 and 18 are wound around the dielectric 16d. A rotating coil and a ground terminal 21 electrically connected to the thin plate conductor 25a through a hole provided in the dielectric 16d are provided. In the following, only the parts different from the fifth embodiment will be described, and components having the same configuration as the inductance element used in the AC power cable with noise filter according to the fifth embodiment will be described with reference to FIGS. In FIG. 30, the same reference numerals as those used in FIGS. 15 to 18 or similar reference numerals are attached, and the description thereof is omitted.

  In the present embodiment, a capacitor is formed by interposing a dielectric 16d between the thin plate-like conductor 25a and the coil (covered conductive wires 17 and 18), but as is apparent from FIGS. 27 and 29, The magnetic core 15d and the thin plate conductor 25a are also electrically insulated by the dielectric 16d.

  As shown in FIG. 30, the dielectric 16d in the present embodiment includes a main portion 16d1 and a lid portion 16d2. The thin plate-like conductor 25a embedded at the time of molding is held from the inner peripheral side surface 16d5 of the main portion 16d1, and the donut-shaped concave portion constituting the core housing portion 16d3 is formed from the outer peripheral side surface 16d4 of the main portion 16d1. Has been. As is apparent from this, in the present embodiment, the thin plate conductor 25a is provided at a position closer to the inner peripheral side surface 16d5 of the dielectric 16d than to the magnetic core 15d.

(Ninth embodiment)
As shown in FIGS. 31 and 34, the ninth embodiment of the present invention relates to an AC power cable with a noise filter provided with an inductance element 14a used for the AC power cable with a noise filter in the first embodiment. Is. In FIG. 31, components having the same configuration as the inductance element used in the power cable with a noise filter according to the first embodiment are denoted by the same reference numerals as those used in FIG. 1 or FIG. In the following, description of these components will be omitted.

  As shown in FIG. 31, the AC power cable with noise filter in the present embodiment includes an inductance element 14 a, an outlet terminal 32, and a power cord 35. The inductance element 14a is disposed on the pedestal 31, and the pedestal 31 is provided with input terminals 33a and 33b, an earth terminal 33c, and a ground metal fitting 34. The covered conducting wires 17 and 18 of the inductance element 14a are electrically connected to the input terminals 33a and 33b, and the ground terminal 21 of the inductance element 14a is electrically connected to the ground metal fitting 34. The terminal 33c is also electrically connected to the ground metal fitting 34. The opposite coated conductors 17 and 18 of the inductance element 14a are electrically connected to the coated conductors 36a and 36b of the power cord of the power cord 35, respectively. The coated conductor 36c of the power cord of the power cord 35 is connected to the ground fitting 34 of the pedestal 31. Electrically connected. The electrical connection technique includes electrical connection by any technique such as curling, caulking, soldering, and welding. The inductance element 14a is arranged on the pedestal 31, and the outlet body 37 is integrally molded or integrated in the state where the connection is completed, thereby completing an AC power cable with a noise filter.

  FIG. 32 is a circuit configuration diagram of the AC power cable with the noise filter of FIG. 31, FIG. 33 is an attenuation characteristic diagram of the conventional AC power cable with the noise filter and the power cable with the noise filter of the present invention, and FIG. It is a structure comparison figure of the AC power cable with a noise filter, and the power cable with a noise filter of this invention.

  In the present invention, as can be seen from these, a noise filter provided in the outlet body is used, and the AC power cable 30 with the noise filter of this structure includes a conventional inductance element as understood from FIG. The attenuation characteristics are excellent in a wide frequency band of 10 kHz to 20 MHz than the AC power cable with noise filter. It is considered that this excellent attenuation characteristic is caused by canceling a part of the line capacitance generated between the covered conductor 17 and the covered conductor 18 by connecting the ground terminal 21 to the ground.

  As described above, according to the present embodiment, by omitting the Y-con, it is possible to obtain the excellent attenuation characteristics as described above while reducing the leakage current from the Y-con.

  As described above, as the ninth embodiment, the AC power cable 30 with the noise filter including the inductance element 14a used for the AC power cable with the noise filter in the first embodiment has been described. However, instead of the inductance element 14a. An inductance element used for the AC power cable with a noise filter in any of the second to eighth embodiments may be used. Further, instead of the one having the toroidal magnetic core such as the inductance element used in the AC power cable with the noise filter of the first to eighth embodiments, an insulating bobbin on which the magnetic core can be mounted is provided. It is also possible to use an inductance element used for an AC power cable with a noise filter having a structure in which a coated conductor is wound around the insulating bobbin.

  The power cable with noise filter described above does not have a Y-con, but it may be configured to further include a Y-con connected between the outlet terminal 32 and the ground metal fitting 34, and the X-con is omitted. However, a configuration including only a Y-con is also possible.

  The embodiments of the present invention have been described above using specific examples. However, the present invention is not limited to these specific examples, and there are design changes that do not depart from the gist of the present invention. Are also included in the present invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  By using the AC power cable with a noise filter of the present invention, the greatest effect can be obtained in suppressing conduction noise and radiation noise of electronic equipment.

The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 1st Embodiment of this invention. The side view of the inductance element shown by FIG. The bottom view of the inductance element shown by FIG. The bottom view which shows the modification of the inductance element shown by FIG. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 2nd Embodiment of this invention. FIG. 6 is a side view of the inductance element shown in FIG. 5. FIG. 6 is a bottom view of the inductance element shown in FIG. 5. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 3rd Embodiment of this invention. FIG. 9 is a side view of the inductance element shown in FIG. 8. FIG. 9 is a bottom view of the inductance element shown in FIG. 8. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 4th Embodiment of this invention. Side view of the inductance element shown in FIG. FIG. 12 is a bottom view of the inductance element shown in FIG. 11. The bottom view which shows the modification of the inductance element shown by FIG. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 5th Embodiment of this invention. The side view of the inductance element shown by FIG. The bottom view of the inductance element shown by FIG. FIG. 16 is a cross-sectional view showing a dielectric and a thin plate conductor included in the inductance element shown in FIG. 15. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 6th Embodiment of this invention. The side view of the inductance element shown by FIG. The bottom view of the inductance element shown by FIG. FIG. 20 is a cross-sectional view showing a dielectric and a thin plate conductor included in the inductance element shown in FIG. 19. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 7th Embodiment of this invention. FIG. 24 is a side view of the inductance element shown in FIG. 23. FIG. 24 is a bottom view of the inductance element shown in FIG. 23. FIG. 24 is a cross-sectional view showing a dielectric and a thin plate conductor included in the inductance element shown in FIG. 23. The top view which shows the inductance element for common modes used for the AC power cable with a noise filter which concerns on the 8th Embodiment of this invention. The side view of the inductance element shown by FIG. FIG. 28 is a bottom view of the inductance element shown in FIG. 27. FIG. 28 is a cross-sectional view showing a dielectric and a thin plate conductor included in the inductance element shown in FIG. 27. The top view which shows the AC power cable with a noise filter which concerns on the 9th Embodiment of this invention. The circuit block diagram of the AC power cable with a noise filter shown by FIG. The attenuation characteristic figure of the conventional AC power cable with a noise filter and the AC power cable with a noise filter of the present invention. The structure comparison figure of the conventional AC power cable with a noise filter and the AC power cable with a noise filter of this invention.

Explanation of symbols

14a, 14a ′, 14a ″, 14b, 14c, 14c ′, 14c ″, 14d Inductive elements 15a, 15b, 15c, 15d Magnetic cores 16a, 16b Insulating cases 16c, 16c ′, 16c ″, 16d Dielectrics 16c1, 16c '1, 16c "1, 16d1 Main parts 16c2, 16c'2, 16c" 2, 16d2 Lids 16c3, 16c'3, 16c "3, 16d3 Core housing parts 16c4, 16c'4, 16c" 4, 16d4 16c5, 16c′5, 16c ″ 5, 16d5 Inner peripheral surface 17, 18 Covered conductor 21 Ground terminal 22 Dielectric 23a, 23b, 23b ′, 23c, 23d Foil-like conductors 24a, 24b, 24b ′, 24c, 25a Thin plate shape Conductor 30 AC power cable with noise filter 31 Base 32 Outlet terminal 33a, 33b Input terminal 3 3c Ground terminal 34 Ground metal fitting 35 Power cords 36a, 36b, 36c Coated conductor 37 of the power cord Outlet body

Claims (19)

A magnetic core of the toroidal shape, an insulator covers the entire of the magnetic core, made from the coated conductor, a coil formed by winding the magnetic core and the insulator, Shi come in contact with at least a portion of the outside of the coil An AC power cable with a noise filter in which an inductance element including a dielectric provided on the outside and a conductor that forms the coil and the dielectric and a capacitor is provided in the outlet body. there are, the object to be covered conductor is electrically connected between the outlet and the power cord, either terminal or bipolar outlets grounding electrodes before the ground is connected to Kishirube collector terminal of the three-pole outlets And the outlet body has a three-pole outlet terminal or a two-pole outlet terminal and a ground pole, and De and the AC power cable with noise filter, characterized in that the outlet body are integrated. A toroidal magnetic core, an insulator covering the whole of the magnetic core, a conductor provided outside the insulator, a dielectric provided outside the conductor , and a covered conductor, A magnetic core, the insulator, the conductor, and a coil formed by winding the dielectric, and a noise in which an inductance element that forms a capacitor with the conductor, the dielectric, and the coil is housed in an outlet body an AC power cable with filter, wherein the covering wire is connected outlets and power between the code electrically, before Kishirube collector connected to the ground terminal of one of the three-electrode outlet terminal or two The outlet body is electrically connected to a ground pole of a pole outlet, and the outlet body has a three-pole outlet terminal or a two-pole outlet terminal and a ground pole. In the cord and the AC power cable with noise filter, characterized in that the outlet body are integrated. The noise filter according to claim 1 or 2 , wherein at least the insulator is interposed between the magnetic core and the conductor, whereby the magnetic core and the conductor are electrically insulated. AC power cable with The dielectric, AC power cable with a noise filter according to any one of claims 1 to 3 you have a predetermined thickness. Before Symbol coated conductive wire is noise filter on AC power cable according to the magnetic core to claim 1, which is wound around the integrants comprising incorporating into said insulator. Before SL dielectric consists enclosing member configured to cover the outer periphery of the coil, noise filter on AC power cable according to Tei Ru claim 1 over at least a portion of the outer peripheral side of the coil.   The AC power cable with a noise filter according to claim 1, wherein the dielectric is made of an insulating sheet or an insulating tape having an adhesive layer on one side or both sides.   The AC power cable with a noise filter according to claim 1, wherein the dielectric is made of a silicone resin sheet or a fluororesin sheet.   The AC power cable with a noise filter according to any one of claims 1 to 8, wherein the conductor is a foil conductor.   The foil-like conductor is formed by metal plating, metal vapor deposition, or metal sputtering on the dielectric, or formed by applying a conductive paint. AC power cable with noise filter.   The AC power cable with a noise filter according to claim 9, wherein the foil conductor is bonded onto the dielectric. A magnetic core, conductor and body that is provided apart from the magnetic core, a dielectric consisting retainable insulator molding the magnetic core and the conductor made of coated wire, winding on said dielectric An AC power cable with a noise filter in which an inductance element that forms a capacitor with the conductor, the dielectric, and the coil is housed in an outlet body, wherein the coated conductor is an outlet and a power cord And a ground terminal connected to the conductor is electrically connected to any terminal of a three-pole outlet or a ground pole of a two-pole outlet, and the outlet body is a three-pole outlet. An outlet terminal or a two-pole outlet terminal and a grounding pole, and the power cord and the outlet body are integrated. AC power cable with in that noise filter.   13. The AC with noise filter according to claim 12, wherein the dielectric includes the conductor and includes a core housing portion that houses the magnetic core at a position away from the conductor. power cable.   The magnetic core is a toroidal core, the dielectric has a toroidal appearance, and the coated conductor is wound around the dielectric to constitute the coil. Item 14. An AC power cable with noise filter according to Item 13.   The AC power cable with a noise filter according to claim 14, wherein the conductor is provided at a position closer to an outer peripheral side surface of the dielectric than the magnetic core.   The AC power cable with a noise filter according to claim 14, wherein the conductor is provided at a position closer to an inner peripheral side surface of the dielectric than the magnetic core.   The AC power cable with a noise filter according to claim 1, further comprising a ground terminal connected to the conductor.   The AC power cable with a noise filter according to claim 1, wherein the magnetic core has a magnetic permeability of 10,000 or more.   The coated conductor of the inductance element includes a first coated conductor and a second coated conductor, and further includes a ground terminal, and the outlet includes the first terminal, the second terminal, and the third terminal or The power cord includes a first coated conductor, a second coated conductor, and a third coated conductor, the first coated conductor of the inductance element, the first terminal, and the first of the power cord. The coated conductor is electrically connected, the second coated conductor of the inductance element and the second terminal, and the second coated conductor of the power cord are electrically connected, and the ground terminal of the inductance element The AC power cable with a noise filter according to any one of claims 1 to 18, wherein the third terminal or the ground electrode and the third coated conductor of the power cord are electrically connected.

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