WO2016163130A1 - ノイズフィルタ - Google Patents
ノイズフィルタ Download PDFInfo
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- WO2016163130A1 WO2016163130A1 PCT/JP2016/051875 JP2016051875W WO2016163130A1 WO 2016163130 A1 WO2016163130 A1 WO 2016163130A1 JP 2016051875 W JP2016051875 W JP 2016051875W WO 2016163130 A1 WO2016163130 A1 WO 2016163130A1
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- Prior art keywords
- noise filter
- coil
- conductor
- coils
- stacking direction
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- 238000004804 winding Methods 0.000 claims abstract description 84
- 230000017525 heat dissipation Effects 0.000 claims description 29
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
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- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F2017/067—Core with two or more holes to lead through conductor
Definitions
- the present invention relates to a noise filter mounted on a power conversion device or the like.
- a noise filter is mounted so as not to output the noise generated with the switching operation of the semiconductor element to the outside.
- a noise filter is generally composed of a coil and a magnetic core.
- the current flowing through the coil is large, the magnetic characteristic of the magnetic core is deteriorated due to heat generation of the coil, and the characteristic as a noise filter may be deteriorated. Therefore, it is necessary to cool the noise filter.
- a conventional noise filter discloses a technique of installing a coil in a space surrounded by heat radiation fins (see, for example, Patent Document 1).
- the outer surface of the coil facing the heat radiating fin is cooled, but the center of the coil is easily heated and the temperature of the center increases. For this reason, the temperature of the magnetic core disposed in the center of the coil increases, and the characteristics as a noise filter may be deteriorated.
- a method of enlarging the cross-sectional area of the coil so that the current density flowing through the coil is conceivable can be considered, but there is a problem that the noise filter becomes large.
- This invention has been made to solve the above-described problems, and improves the heat dissipation of the noise filter without increasing the size of the noise filter.
- a coil in which a flat conductor is laminated to form a winding pattern, a magnetic core wound around the coil, and an end of the coil in the lamination direction are electrically connected.
- the thermal resistance of a conductor disposed at an end portion in the stacking direction is the smallest compared to the thermal resistance of other conductors.
- the heat resistance of the conductor arranged at the end in the stacking direction in close contact with the heat radiating member is made smaller than the heat resistance of the other conductors, so that the heat dissipation of the noise filter is improved without increasing the size of the noise filter. be able to.
- FIG. FIG. 1 is a perspective view of a noise filter according to Embodiment 1 for carrying out the present invention.
- the noise filter 100 according to the present embodiment is installed between, for example, an inverter that is a power converter and a power source for driving the inverter.
- a noise filter 100 includes a coil 1a and 1b in which a flat conductor 50 is laminated to form a winding pattern, a magnetic core 2 wound around the coils 1a and 1b, a coil 1a and It is comprised with the heat radiating member 3 electrically insulated and closely_contact
- the heat radiating member 3 is electrically set to the ground potential.
- the flat conductor 50 is formed of a coated conductor in which the outer peripheral portion of a metal flat plate 4 such as copper is covered with a dielectric 5.
- the dielectric 5 include a coating material such as polyimide, polyamideimide, and polyesterimide, a metal oxide by electrodeposition, an epoxy resin by powder coating, and the like, but a material having good heat dissipation performance is preferable.
- the film thickness of the dielectric 5 ensures the insulation between the flat conductor 50 and the heat radiating member 3 and the insulation between the laminated flat conductors 50 from the viewpoint of heat dissipation. It is preferable to be as thin as possible.
- the magnetic core 2 is composed of a U-shaped split core 2a and a flat split core 2b in order to be inserted into the coils 1a and 1b, and the split cores 2a and 2b are joined together. A closed magnetic circuit is formed.
- a heat dissipating fin provided with a fin for heat dissipating is used as the heat dissipating member 3.
- the flat conductors 50 constituting the coils 1a and 1b are actually arranged in close contact, and the magnetic core 2 is arranged inserted into the coils 1a and 1b. They are shown separately for easy understanding of the filter configuration.
- FIG. 2 is an explanatory diagram showing the configuration of the coils 1a and 1b formed by laminating flat conductors 50.
- FIG. 2 shows flat conductors (winding pieces) on which the coils 1a and 1b in FIG. 1 are laminated, and FIG. The left side of (b) and (c) corresponds to the coil 1a, and the right side corresponds to the coil 1b.
- 2A is a conductor in close contact with the heat radiating member 3
- FIG. 2B is a conductor laminated thereon
- FIG. 2C is further laminated thereon. It is a conductor.
- FIG. 2A is a conductor in close contact with the heat radiating member 3
- FIG. 2B is a conductor laminated thereon
- FIG. 2C is further laminated thereon. It is a conductor.
- FIG. 2 is a conductor in close contact with the heat radiating member 3
- FIG. 2B is a conductor laminated thereon
- FIG. 2C is further laminated
- the coil 1a has a winding piece 11 as a lowermost layer, a winding piece 13 is laminated thereon, and a winding piece 15 is further laminated thereon.
- the coil 1b is configured such that the winding piece 12 is the lowest layer, the winding piece 14 is laminated thereon, and the winding piece 16 is further laminated thereon.
- the widths of the winding pieces 11 to 16 in the energizing direction are substantially equal.
- the winding pieces are electrically connected to form a coil having a spiral winding pattern.
- the outer peripheral portion of the metal flat plate 4 is covered with the dielectric 5.
- the end portion 21 on the upper surface of the winding piece 11 and the end portion 23 on the lower surface of the winding piece 13 are used.
- the end portion 24 of the upper surface and the end portion 27 of the lower surface of the winding piece 15 are exposed, and the winding pieces 11, 13 and 15 are laminated.
- the spiral coil 1a can be formed by electrically connecting the exposed metal flat plates.
- the metal flat plate 4 at the end portion 28 of the surface of the coil is exposed, and when the winding pieces 12, 14, and 16 are laminated, the metal flat plate 1b is electrically connected at the exposed portion of the metal flat plate 1b.
- As a method for electrical connection fusion bonding using a low melting point metal or mechanical bonding using screws or rivets can be used.
- the coil terminals 1, 1, and 2 b are connected to the coil terminals 31, 32, 33 so as to protrude from the coil winding region to the winding pieces 11, 12, 15, 16 in order to be electrically connected to other devices. , 34 are formed.
- the noise filter 100 in the present embodiment is installed, for example, between an inverter that is a power converter and a power source for driving the inverter.
- the output terminal of the power source is connected to the coil terminal part 31 which is one terminal part of the coil 1a and the coil terminal part 32 which is one terminal part of the coil 1b, and the coil which is the other terminal part of the coil 1a
- An input terminal of the inverter is connected to the terminal portion 33 and the coil terminal portion 34 which is the other terminal portion of the coil 1b.
- the noise filter 100 connected in this way can suppress the switching noise generated in the inverter from propagating to the power supply side or the outside of the device.
- a boost converter may be disposed between the noise filter and the inverter.
- FIG. 3 is a cross-sectional view taken along line A-A ′ of the noise filter 100 of the present embodiment shown in FIG.
- the coils 1a and 1b are formed by laminating each winding piece constituted by the flat conductor 50 on the heat radiating member 3, but in this embodiment, the coil piece in contact with the heat radiating member 3 is used.
- the thicknesses of 11 and 12 are the smallest compared to the thicknesses of the other winding pieces 13, 14, 15 and 16. That is, the thermal resistance of the winding pieces 11 and 12 in contact with the heat radiating member 3 is configured to be the smallest compared to the thermal resistance of the other winding pieces 13, 14, 15 and 16.
- the cross-sectional area through which the current (I) flows decreases, and the electrical resistance (R) increases. Since the Joule heat generated by the current flowing through the conductor is proportional to I 2 ⁇ R, the Joule heat generated increases as the conductor thickness decreases. However, since the winding pieces 11 and 12 in contact with the heat radiating member 3 are excellent in heat dissipation compared to other winding pieces, the heat radiating member 3 can radiate heat more quickly than other winding pieces. . Further, when the conductor thickness of the winding piece in contact with the heat radiating piece 3 is reduced, the entire coils 1a and 1b can be reduced in size.
- the metal flat plate 4 constituting the conductors of the winding pieces 11 and 12 in contact with the heat radiating member 3 is in contact with the heat radiating member 3 through the dielectric 5, and a stray capacitance is formed between the metal flat plate 4 and the heat radiating member 3. Yes.
- this stray capacitance as a ground capacitor, the number of components can be reduced and the size can be reduced as compared with a noise filter configured by combining two individual components of a conventional inductor and capacitor. Further, the size of the stray capacitance can be adjusted to an arbitrary size by adjusting the film thickness of the dielectric 5.
- the capacitance is maximized and the noise reduction effect is achieved by minimizing the film thickness of the dielectric within a range in which insulation between the flat conductor 50 and the heat dissipation member 3 can be secured.
- the heat dissipation performance can be enhanced.
- the heat dissipation of the noise filter can be improved without increasing the size of the noise filter.
- the thickness of only the winding pieces 11 and 12 in contact with the heat radiating member 3 is made smaller than the thickness of the other winding pieces, but the thickness of the other winding pieces is adjusted appropriately. May be.
- the thickness of the winding piece 11 in contact with the heat radiating member 3 is minimized, and the thickness of the winding pieces 13 and 15 laminated on the winding piece 11 is set to be the same as that of the winding piece 11.
- the thickness may be increased stepwise from the thickness.
- the winding pieces 11 and 12 in contact with the heat radiating member 3 are in close contact with the heat radiating member 3 as a whole. Therefore, in order to eliminate the step between the upper surface of the split core 2b of the magnetic core 2 and the surface of the heat radiating member 3, it is preferable that the heat radiating member 3 has a notch portion in which the split core 2b is embedded. .
- the magnetic core 2 is composed of the U-shaped divided core 2a and the flat divided core 2b. However, the divided core 2b also has a U-shaped cross section. Also good.
- FIG. FIG. 4 is a perspective view of a noise filter according to Embodiment 2 for carrying out the present invention.
- the noise filter 200 of the present embodiment has the same components as the noise filter 100 described in the first embodiment, but has a different coil shape.
- the noise filter 200 of the present embodiment includes a coil 1a and 1b in which a flat conductor 50 is laminated and a winding pattern is formed, and a magnetic core 2 wound around the coils 1a and 1b. And a heat dissipating member 3 that is electrically insulated and closely attached to the ends of the coils 1a and 1b in the stacking direction.
- FIG. 5 is a cross-sectional view taken along line B-B ′ of the noise filter 200 of the present embodiment shown in FIG.
- the coils 1a and 1b are formed by laminating each winding piece constituted by the flat conductor 50 on the heat radiating member 3, but in this embodiment, the coil piece in contact with the heat radiating member 3 is used.
- the widths of the conductors 11 and 12 are the largest compared to the widths of the conductors of the other winding pieces 13, 14, 15 and 16. In the present embodiment, the thickness of the winding pieces 11 to 16 is substantially equal.
- the area in the stacking direction of the conductors of the winding pieces 11 and 12 in contact with the heat dissipation member 3 is configured to be the largest compared to the area in the stacking direction of the conductors of the other winding pieces 13, 14, 15 and 16. ing. That is, the thermal resistance of the winding pieces 11 and 12 in contact with the heat radiating member 3 is configured to be the smallest compared to the thermal resistance of the other winding pieces 13, 14, 15 and 16.
- the contact area with the heat radiating member 3 is increased, and the heat dissipation of the coils 1a and 1b can be enhanced.
- the conductor thickness of each winding piece can be reduced.
- the thickness of the winding piece can be reduced, so that the entire coils 1a and 1b can be reduced in size.
- the capacitance between the metal flat plate 4 and the heat radiating member 3 can be increased by increasing the contact area with the heat radiating member 3, the noise reduction effect can be improved.
- the heat dissipation of the noise filter can be improved without increasing the size of the noise filter.
- the area in the stacking direction of the winding pieces 11 and 12 in contact with the heat radiating member 3 is larger than the area in the stacking direction of the other winding pieces.
- the area may be increased sequentially.
- winding piece near the thermal radiation member 3 to the thermal radiation member 3 can be improved.
- the conductor thickness of each winding piece can be further reduced, and the entire coils 1a and 1b can be further reduced in size.
- the thickness of the laminated winding pieces is the same.
- the thickness may be made smaller than the conductor thickness of other winding pieces.
- FIG. FIG. 6 is a cross-sectional view of the noise filter 300 according to the third embodiment.
- the noise filter 300 of the present embodiment has the same constituent members as the noise filter 100 described in the first embodiment, but is different in the shape of the heat dissipating member 3 and the winding piece in contact with the heat dissipating member 3.
- the noise filter 300 of the present embodiment includes a coil 1 a and 1 b in which a flat conductor 50 is laminated and a winding pattern is formed, and a magnetic core wound around the coils 1 a and 1 b ( (Not shown) and a heat dissipating member 3 that is electrically insulated and closely adhered to the ends of the coils 1a and 1b in the stacking direction.
- the coils 1a and 1b are formed by laminating each winding piece constituted by the flat conductor 50 on the heat radiating member 3, but in this embodiment, the coil piece in contact with the heat radiating member 3 is used.
- the surfaces where the conductors 11 and 12 and the heat dissipating member 3 face each other are formed in an uneven shape and are in close contact with each other.
- the conductors of the winding pieces 11 and 12 and the heat radiating member 3 are in close contact with each other in a concavo-convex shape, and the concavo-convex shape may be a cylindrical or rectangular concavo-convex shape such as a slit-like concavo-convex shape. it can.
- the contact area between the conductors of the winding pieces 11 and 12 and the heat radiating member 3 is increased, and the heat dissipation of the coils 1a and 1b can be improved.
- the conductor thickness of each winding piece can be reduced, so that the entire coils 1a and 1b can be reduced in size.
- the capacitance between the metal flat plate 4 and the heat radiating member 3 can be increased by increasing the contact area with the heat radiating member 3, the noise reduction effect can be improved.
- the heat dissipation of the noise filter can be improved without increasing the size of the noise filter.
- FIG. 7 is a perspective view of a noise filter according to the fourth embodiment.
- the noise filter 400 of the present embodiment is the same as the noise filter 100 described in the first embodiment, but is electrically connected to the end of the coil opposite to the end where the coil and the heat dissipation member are in close contact. It is provided with a cooling member that is insulated and closely adhered to.
- a noise filter 400 includes a coil 1a and 1b in which flat conductors are laminated to form a winding pattern, a magnetic core 2 wound around the coils 1a and 1b, and coils 1a and 1b.
- the heat dissipating member 3 that is electrically insulated and adhered to the end in the stacking direction of the coil, and the end of the coil opposite to the end where the coils 1a and 1b and the heat dissipating member are in close contact with each other are electrically insulated and adhered
- a metal plate can be used as the cooling member 6.
- the coils 1a and 1b are configured by laminating each winding piece formed of a flat conductor on the heat radiating member 3, but in the present embodiment, the coil is in contact with the heat radiating member 3.
- the thickness of the piece and the thickness of the winding piece in contact with the cooling member 6 are configured to be smaller than the thickness of the winding piece at the other central part of the coil.
- the heat radiating property of the noise filter is improved without increasing the size of the noise filter. Can be made.
- the coils 1a and 1b can be efficiently cooled, the thickness of the conductors constituting the coils 1a and 1b can be further reduced, and the noise filter can be further downsized.
- the cooling member 6 may be electrically set to the ground potential similarly to the heat radiating member 3.
- the cooling member 6 and the heat dissipation member 3 may be electrically connected.
- the metal flat plate of coil 1a, 1b will contact the cooling member 6 and the heat radiating member 3 via a dielectric, and the metal flat plate of coil 1a, 1b, the cooling member 6, and the heat radiating member 3 and A stray capacitance is formed between them.
- this stray capacitance as a ground capacitor, the capacitance of the noise filter 400 can be increased, and the noise reduction effect can be improved.
- noise filter of the present embodiment can be combined with the coil configuration described in the second and third embodiments.
- FIG. FIG. 8 is a perspective view of a noise filter according to the fifth embodiment.
- the noise filter 500 according to the present embodiment has the same components as those of the noise filter 100 described in the first embodiment, but is insulatively and electrically insulated from the conductors between the stacked flat conductors. A conductive plate electrically connected to the heat radiating member is provided.
- a noise filter 500 includes coils 1a and 1b in which flat conductors similar to those in the first embodiment are laminated to form a winding pattern, and a magnetic core wound around the coils 1a and 1b. 2, the heat dissipating member 3 that is electrically insulated and adhered to the ends of the coils 1 a and 1 b in the stacking direction, and the end opposite to the end of the flat conductor that is in close contact with the heat dissipating member It is composed of a conductive plate 7.
- the conductive plate 7 is insulatively insulatively contacted between the conductors constituting the coils 1a and 1b and is electrically connected to the heat dissipation member.
- a metal plate can be used as the conductive plate 7.
- the thickness of the winding piece in contact with the heat radiating member 3 is the smallest compared with the thickness of the other winding pieces, so that the size of the noise filter is not increased.
- the heat dissipation of the noise filter can be improved.
- the stray capacitance formed between the coils 1a and 1b and the heat radiating member 3 can be used as a ground capacitor.
- the capacitance of the filter 500 can be increased, and the noise reduction effect can be improved.
- the conductive plate 7 is arranged at the end opposite to the end where the flat conductor and the heat dissipating member are in close contact with each other.
- the conductive plate 7 is arranged between any layers of the laminated flat conductors. May be.
- FIG. 9 is a perspective view of a noise filter according to the sixth embodiment.
- the noise filter 600 of the present embodiment is a combination of the noise filter described in the second embodiment and the conductive plate 7 described in the fifth embodiment.
- a noise filter 600 includes coils 1a and 1b in which flat conductors similar to those in the second embodiment are laminated to form a winding pattern, and a magnetic core wound around the coils 1a and 1b. 2, the heat dissipating member 3 that is electrically insulated and adhered to the ends of the coils 1 a and 1 b in the stacking direction, and the end opposite to the end of the flat conductor that is in close contact with the heat dissipating member It is composed of a conductive plate 7.
- the conductive plate 7 is insulatively insulatively contacted between the conductors constituting the coils 1a and 1b and is electrically connected to the heat dissipation member.
- the area in the stacking direction of the winding pieces in contact with the heat radiating member 3 is the largest compared to the area in the stacking direction of the other winding pieces.
- the heat dissipation of the noise filter can be improved without increasing the size.
- the stray capacitance formed between the coils 1a and 1b and the heat radiating member 3 can be used as a ground capacitor.
- the capacitance of the filter 600 can be increased, and the noise reduction effect can be improved.
- the conductive plate 7 is arranged at the end opposite to the end where the flat conductor and the heat dissipating member are in close contact with each other.
- the conductive plate 7 is arranged between any layers of the laminated flat conductors. May be.
- FIG. FIG. 10 is a perspective view of a noise filter according to the seventh embodiment.
- the noise filter 700 of the present embodiment is a combination of the noise filter described in the fourth embodiment and the conductive plate 7 described in the fifth embodiment.
- a noise filter 700 includes coils 1a and 1b in which flat conductors similar to those in the fourth embodiment are laminated to form a winding pattern, and a magnetic core wound around the coils 1a and 1b. 2, the heat dissipating member 3 that is electrically insulated and adhered to the ends of the coils 1 a and 1 b in the stacking direction, and the end of the coil opposite to the end where the coils 1 a and 1 b and the heat dissipating member are in close contact with each other
- the cooling member 6 is electrically insulated and is in close contact, and the conductive plate 7 is inserted into the end opposite to the end of the flat conductor that is in close contact with the heat dissipation member.
- the conductive plate 7 is insulatively insulatively contacted between the conductors constituting the coils 1a and 1b and is electrically connected to the heat dissipation member.
- the heat radiating property of the noise filter is improved without increasing the size of the noise filter. Can be made.
- the stray capacitance formed between the coils 1a and 1b and the heat radiating member 3 can be used as a ground capacitor.
- the capacitance of the filter 700 can be increased, and the noise reduction effect can be improved.
- the conductive plate 7 is arranged at the end opposite to the end where the flat conductor and the heat dissipating member are in close contact with each other.
- the conductive plate 7 is arranged between any layers of the laminated flat conductors. May be.
- the conductive plate 7 is combined with the configuration of the noise filter described in the first to third embodiments.
- the conductive plate is added to the configuration of the noise filter described in the fourth embodiment. 7 may be combined.
- the coated conductor in which the outer peripheral portion of the metal flat plate is covered with a dielectric is used as the conductor constituting the coils 1a and 1b.
- it may be composed of other conductors.
- a conductor in which a metal flat plate is sealed with an embedding resin, a conductor integrally formed with a printed board, or the like can be used.
- it is good also as a structure which sandwiched the insulating dielectric sheet between the conductors which should ensure insulation, using a metal flat plate as a conductor.
- the coils 1a and 1b are used under a DC voltage
- a potential difference of 1V or less is generated between the layers of the winding pieces. It becomes possible to secure the sex.
- an insulating member may be inserted between them.
- a material having a high thermal conductivity and a high relative dielectric constant is desirable.
- a ceramic substrate, a high heat dissipation insulating sheet filled with an inorganic filler, heat dissipation grease, or the like can be used.
Abstract
Description
図1は、この発明を実施するための実施の形態1に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ100は、例えば電力変換装置であるインバータと、このインバータを駆動するための電源との間に設置されるものである。
図4は、この発明を実施するための実施の形態2に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ200は、実施の形態1で説明したノイズフィルタ100と構成部材は同様であるが、コイルの形状が異なるものである。
図6は、本実施の形態3におけるノイズフィルタ300の断面図である。本実施の形態のノイズフィルタ300は、実施の形態1で説明したノイズフィルタ100と構成部材は同様であるが、放熱部材3および放熱部材3に接した巻線片の形状が異なるものである。
図7は、実施の形態4に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ400は、実施の形態1で説明したノイズフィルタ100と構成部材は同様であるが、コイルと放熱部材とが密着する端部と反対側のコイルの端部に電気的に絶縁されて密着された冷却部材を備えたものである。
図8は、実施の形態5に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ500は、実施の形態1で説明したノイズフィルタ100と構成部材は同様であるが、積層された平板状の導体の層間に、導体と電気的に絶縁されて密着され前記放熱部材と電気的に接続された導電板を備えたものである。
図9は、実施の形態6に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ600は、実施の形態2で説明したノイズフィルタに実施の形態5で説明した導電板7を組み合わせたものである。
図10は、実施の形態7に係るノイズフィルタの斜視図である。本実施の形態のノイズフィルタ700は、実施の形態4で説明したノイズフィルタに実施の形態5で説明した導電板7を組み合わせたものである。
1a、1b コイル、 2 磁性体コア、 2a、2b 分割コア
3 放熱部材、 4 金属平板、 5 誘電体、 6 冷却部材
7 導電板、 11~16 巻線片、 21~28 接続部
31~34 端子部、 50 導体
Claims (8)
- 平板状の導体が積層されて巻線パターンが構成されたコイルと、
このコイルに巻き回された磁性体コアと、
前記コイルの積層方向の端部に電気的に絶縁されて密着された放熱部材と
を備えたノイズフィルタにおいて、
前記積層方向の端部に配置された前記導体の熱抵抗が他の導体の熱抵抗と比較して最も小さいこと
を特徴とするノイズフィルタ。 - 前記積層方向の端部に配置された前記導体の厚みが他の導体の厚みと比較して最も小さいこと
を特徴とする請求項1に記載のノイズフィルタ。 - 前記積層方向の端部に配置された前記導体の積層方向の面積が他の導体の積層方向の面積と比較して最も大きいこと
を特徴とする請求項1に記載のノイズフィルタ。 - 前記積層方向の端部に配置された前記導体と前記放熱部材とが密着する面が互いに凹凸形状であること
を特徴とする請求項1~3のいずれか1項に記載のノイズフィルタ。 - 前記コイルと前記放熱部材とが密着する端部と反対側の前記コイルの端部に電気的に絶縁されて密着された冷却部材を備えたこと
を特徴とする請求項1~4のいずれか1項に記載のノイズフィルタ。 - 前記コイルと前記放熱部材との間に誘電体を備えたことを特徴とする請求項1~4のいずれか1項に記載のノイズフィルタ。
- 前記コイルと前記冷却部材との間に誘電体を備えたことを特徴とする請求項5に記載のノイズフィルタ。
- 前記コイルを構成する前記導体の層間に、前記導体と電気的に絶縁されて密着され前記放熱部材と電気的に接続された導電板を備えたこと
を特徴とする請求項1~5のいずれか1項に記載のノイズフィルタ。
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JP2016533742A JP6008160B1 (ja) | 2015-04-08 | 2016-01-22 | ノイズフィルタ |
DE112016001620.4T DE112016001620T5 (de) | 2015-04-08 | 2016-01-22 | Rauschfilter |
CN201680018367.3A CN107534424B (zh) | 2015-04-08 | 2016-01-22 | 噪声滤波器 |
US15/554,865 US20180047497A1 (en) | 2015-04-08 | 2016-01-22 | Noise filter |
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JP (1) | JP6008160B1 (ja) |
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CN109152316A (zh) * | 2017-06-27 | 2019-01-04 | 矢崎总业株式会社 | 噪声滤波器和降噪单元 |
WO2020039787A1 (ja) * | 2018-08-20 | 2020-02-27 | 三菱電機株式会社 | 回路装置及び電力変換装置 |
JP2020088116A (ja) * | 2018-11-22 | 2020-06-04 | トヨタ自動車株式会社 | リアクトルユニット |
WO2020202797A1 (ja) * | 2019-04-04 | 2020-10-08 | 住友電気工業株式会社 | チョークコイル |
WO2020202796A1 (ja) * | 2019-04-04 | 2020-10-08 | 住友電気工業株式会社 | チョークコイル |
WO2020246028A1 (ja) * | 2019-06-07 | 2020-12-10 | 三菱電機株式会社 | ノイズフィルタ及び電源装置 |
Families Citing this family (3)
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DE112017000477T5 (de) * | 2016-01-21 | 2018-09-27 | Mitsubishi Electric Corporation | Schaltungseinrichtung und Energie-Umwandlungseinrichtung |
JP6783308B2 (ja) | 2016-06-24 | 2020-11-11 | 三菱電機株式会社 | 絶縁型コンバータ |
KR20220057911A (ko) * | 2020-10-30 | 2022-05-09 | 현대자동차주식회사 | 방열판을 가지는 평면 변압기 |
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JP6008160B1 (ja) | 2016-10-19 |
CN107534424B (zh) | 2020-11-03 |
DE112016001620T5 (de) | 2018-01-04 |
US20180047497A1 (en) | 2018-02-15 |
JPWO2016163130A1 (ja) | 2017-04-27 |
CN107534424A (zh) | 2018-01-02 |
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