WO2017051551A1 - 車載装置のノイズフィルタおよび車載装置 - Google Patents
車載装置のノイズフィルタおよび車載装置 Download PDFInfo
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- WO2017051551A1 WO2017051551A1 PCT/JP2016/058081 JP2016058081W WO2017051551A1 WO 2017051551 A1 WO2017051551 A1 WO 2017051551A1 JP 2016058081 W JP2016058081 W JP 2016058081W WO 2017051551 A1 WO2017051551 A1 WO 2017051551A1
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- WO
- WIPO (PCT)
- Prior art keywords
- magnetic body
- support
- coil
- noise filter
- vehicle
- Prior art date
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- 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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- 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
-
- 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
- H01F17/062—Toroidal core with turns of coil around it
-
- 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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
Definitions
- the present invention relates to a noise filter for an in-vehicle device and an in-vehicle device.
- the present inventors have found a problem that electrical characteristics deteriorate when a coil constituting a noise filter is covered with a mold resin.
- a noise filter of an in-vehicle device includes a support device provided in a housing of the in-vehicle device, a magnetic body supported by the support device, and a winding portion wound around the magnetic body.
- the support device supports the magnetic body so that the outer peripheral side surface of the winding portion is disposed at a position separated from the housing.
- the noise filter can be fixed to the in-vehicle device without deteriorating the electrical characteristics.
- FIG. 5A is a schematic side view showing the inductor holding structure according to the first embodiment
- FIG. 5B is a schematic cross-sectional view taken along the line vb-vb in FIG. 5A
- FIG. 5C is a cross-sectional view in FIG.
- the schematic diagram which shows a support part.
- FIG. 7A is a schematic side view showing the inductor holding structure according to the second embodiment, FIG.
- FIG. 7B is a schematic cross-sectional view taken along the line viib-viib in FIG. 7A, and FIG. The figure which looked at the support part from the opposite side to Drawing 7 (b).
- FIG. 9A is a schematic side view showing the inductor holding structure according to the third embodiment
- FIG. 8B is a schematic cross-sectional view taken along the line viii-viib in FIG.
- FIG. 4A is a schematic side view showing an inductor holding structure according to Modification Example 1.
- FIG. 5B is a schematic side view showing an inductor holding structure according to Modification Example 2.
- FIG. The side surface schematic diagram which shows the holding structure of the inductor (toroidal type coil) which concerns on the modification 5.
- FIG. 1 is a schematic longitudinal sectional view of a valve timing control device of an engine (internal combustion engine) as an example of an on-vehicle device
- FIG. 2 is an exploded perspective view of the valve timing control device.
- the valve timing control device is an engine valve for controlling the combustion chamber air supply so as to achieve a combustion state suitable for the engine speed and load in order to improve the fuel efficiency of the automobile and reduce carbon dioxide emissions. It is a device that can freely change the opening and closing timing of.
- the valve timing control device includes a timing sprocket 1 that is a drive rotating body that is rotationally driven by a crankshaft of an engine (internal combustion engine), and a bearing (not shown) on a cylinder head (not shown). ), A camshaft 2 that is rotatably supported by the rotational force transmitted from the timing sprocket 1, a cover member 4 that is fixed to a chain cover 49 disposed in front of the timing sprocket 1, and an engine A phase changing mechanism 3 that changes the relative rotational phase of the timing sprocket 1 and the camshaft 2 in accordance with the operating state;
- the timing sprocket 1 is formed integrally with an iron-based metal in an annular shape, and an inner peripheral surface is integrally provided on the outer periphery of the sprocket body 1a with a stepped diameter, and a wound timing chain (non-rotated) is formed. And a gear portion 1b that receives a rotational force from the crankshaft via an internal gear component 19 provided integrally with the front end side of the sprocket body 1a.
- a large-diameter ball bearing 43 is interposed between a driven member 9 (described later) provided at the front end of the camshaft 2 and the sprocket body 1a.
- the timing sprocket 1 and the camshaft 2 are supported by a large-diameter ball bearing 43 so as to be relatively rotatable.
- the large diameter ball bearing 43 includes an outer ring 43a, an inner ring 43b, and a ball 43c interposed between the outer ring 43a and the inner ring 43b.
- the outer ring 43a is fixed to the inner peripheral side of the sprocket body 1a
- the inner ring 43b is fixed to the outer peripheral side of the driven member 9.
- the internal tooth component 19 is integrally formed at the front end of the sprocket body 1a and is formed in a cylindrical shape extending forward.
- the internal tooth component 19 has a plurality of corrugated internal teeth 19a formed on the inner periphery.
- an annular female screw forming portion 6 provided in the motor housing 5 described later is disposed to face the internal tooth constituent portion 19.
- An annular holding plate 21 is disposed at the rear end of the sprocket body 1a opposite to the internal tooth component 19.
- the holding plate 21 is integrally formed of a metal plate material.
- the holding plate 21 has an outer diameter substantially the same as the outer diameter of the sprocket body 1 a and an inner diameter smaller than the inner diameter of the outer ring 43 a of the large-diameter ball bearing 43.
- the inner peripheral portion 21a of the holding plate 21 is disposed in contact with the outer end surface in the axial direction of the outer ring 43a.
- a stopper convex portion 21b protruding inward in the radial direction, that is, in the central axis direction is integrally provided at a predetermined position on the inner peripheral edge of the inner peripheral portion 21a.
- bolt insertion holes 1c and 21d are formed in the outer peripheral portions of the sprocket main body 1a (internal tooth constituent portion 19) and the holding plate 21, respectively, at substantially equal intervals in the circumferential direction.
- the female screw forming portion 6 has six female screw holes 6a at positions corresponding to the bolt insertion holes 1c and 21d.
- Six bolts 7 are inserted into the respective bolt insertion holes 1c and 21d and screwed into the respective female screw holes 6a, whereby the timing sprocket 1, the holding plate 21 and the motor housing 5 are fastened together in the axial direction. .
- the cover member 4 is formed of a resin material and is disposed so as to cover the front end portion of the motor housing 5.
- the cover member 4 protects each member such as a base 28 on which an electronic board including a noise filter and a rotation angle sensor of the electric motor 8 described later are mounted at high density, and an electronic board disposed on the front side of the base 28.
- a connector member 33 and 34 for connecting the valve timing control device to an engine controller for controlling the valve timing control device and the like.
- a flange 28 c is formed on the outer peripheral edge of the base 28.
- a plurality of boss portions 28d are provided on the flange 28c at unequal intervals in the circumferential direction. As shown in FIG. 1, the bolt is inserted into each boss portion 28 d and screwed into the female screw hole 49 a of the chain cover 49, whereby the cover member 4 is fixed to the chain cover 49.
- the motor housing 5 includes a cylindrical housing main body 5a formed by pressing a ferrous metal material into a bottomed cylindrical shape, and a sealing plate made of a synthetic resin nonmagnetic material that seals the front end opening of the housing main body 5a. 11.
- the housing body 5a has a disk-shaped partition wall 5b on the rear end side.
- a shaft portion insertion hole 5c through which an eccentric shaft portion 39 to be described later is inserted is formed substantially at the center of the partition wall 5b.
- a cylindrical extension 5d that protrudes in parallel with the axial direction of the camshaft 2 is provided at the hole edge of the shaft insertion hole 5c.
- a female thread forming portion 6 is provided on the outer peripheral side of the front end face of the partition wall 5b.
- the camshaft 2 has two drive cams (not shown) per cylinder for opening an intake valve (not shown) on the outer periphery.
- a flange 2 a is integrally provided at the front end portion of the camshaft 2.
- the outer diameter of the flange 2a is set to be slightly larger than the outer diameter of the fixed end portion 9a of the driven member 9 described later, and the outer peripheral portion of the front end surface is the inner ring 43b of the large-diameter ball bearing 43 after assembling each component.
- the camshaft 2 and the driven member 9 are coupled from the axial direction by the cam bolt 10 with the front end face of the flange 2a in contact with the driven member 9 from the axial direction.
- the head 10a of the cam bolt 10 supports the inner ring of the roller bearing 37 from the axial direction.
- a male screw 10c is formed on the outer periphery of the shaft portion 10b of the cam bolt 10 to be screwed into a female screw formed from the end of the cam shaft 2 toward the inside in the axial direction.
- the driven member 9 is integrally formed of a ferrous metal.
- the driven member 9 includes a disk-shaped fixed end portion 9a formed on the rear end side (camshaft 2 side), a cylindrical portion 9b protruding in the axial direction from the inner peripheral front end surface of the fixed end portion 9a, and a fixed end
- a cylindrical retainer 41 that is formed integrally with the outer peripheral portion of the portion 9 a and holds a plurality of rollers 48 is provided.
- the driven member 9 is provided with a through hole 9c through which the shaft portion 10b of the cam bolt 10 is inserted.
- the fixed end portion 9 a has a rear end surface disposed in contact with a front end surface of the flange 2 a of the camshaft 2, and is fixed in pressure contact with the flange 2 a by the axial force of the cam bolt 10 from the axial direction.
- the cylindrical portion 9b has a through hole 9d through which the shaft portion 10b of the cam bolt 10 is inserted, and a needle bearing 38 as a bearing member is provided on the outer peripheral side.
- a plurality of rollers having a substantially rectangular shape for holding a plurality of rollers 48 so as to roll are provided at substantially equal intervals in the circumferential direction of the cylindrical tip 41 a of the cage 41.
- a hole is formed.
- the number of roller holding holes (that is, the number of rollers 48) is one less than the total number of teeth of the internal teeth 19 a of the internal tooth component 19.
- the phase changing mechanism 3 includes an electric motor (DC motor with brush) 8 disposed on the front end side of the cylindrical portion 9b of the driven member 9, and a speed reducing mechanism that reduces the rotational speed of the electric motor 8 and transmits it to the camshaft 2.
- the speed reduction mechanism includes an eccentric shaft portion 39 that performs eccentric rotational movement, a medium-diameter ball bearing 47 provided on the outer periphery of the eccentric shaft portion 39, a roller 48 provided on the outer periphery of the medium-diameter ball bearing 47, and the roller 48.
- a cage 41 that allows radial movement while being held in the rolling direction, and a driven member 9 that is integral with the cage 41 are included.
- the electric motor 8 is a brushed DC motor, a motor housing 5 that is a yoke that rotates integrally with the timing sprocket 1, and a motor housing 5 that is rotatably provided inside the motor housing 5.
- the motor output shaft 13 is formed in a stepped cylindrical shape and functions as an armature.
- the motor output shaft 13 includes a rear large diameter portion 13a and a front small diameter portion 13b.
- An iron core rotor 17 is fixed to the outer periphery of the large diameter portion 13a.
- An eccentric shaft portion 39 constituting a part of the speed reduction mechanism is integrally formed on the rear end side of the large diameter portion 13a.
- the annular member 20 is press-fitted and fixed to the outer periphery of the small diameter portion 13b.
- a commutator (commutator) 71 is press-fitted and fixed to the outer peripheral surface of the annular member 20 from the axial direction.
- a plug body 55 that suppresses leakage of lubricating oil supplied to the motor output shaft 13 and the eccentric shaft portion 39 to lubricate the roller bearing 37 and the needle bearing 38 to the outside. Is press-fitted and fixed.
- the iron core rotor 17 is formed of a magnetic material having a plurality of magnetic poles, and the outer peripheral side is configured as a bobbin having a slot around which the coil 18 is wound.
- the commutator 71 is formed in an annular shape from a conductive material. In the commutator 71, the end of the coil 18 from which the coil 18 is drawn is electrically connected to each segment divided into the same number as the number of poles of the iron core rotor 17.
- the permanent magnets 14 and 15 are formed in a cylindrical shape as a whole and have a plurality of magnetic poles in the circumferential direction.
- the positions of the permanent magnets 14 and 15 in the axial direction are offset from the fixed position of the iron core rotor 17. That is, the permanent magnets 14 and 15 are arranged such that the axial center thereof is offset toward the stator 16 side with respect to the axial center of the iron core rotor 17. Accordingly, the front end portions of the permanent magnets 14 and 15 are arranged so as to overlap the commutator 71 and the motor brushes 25a and 25b of the stator 16 in the radial direction.
- the stator 16 includes a resin plate 22, a pair of resin holders 23a and 23b, a pair of motor brushes 25a and 25b, a first power supply slip ring 26a, and a second power supply slip ring 26b.
- the resin plate 22 is a disk-shaped member made of a resin material, and is integrally provided on the inner peripheral side of the sealing plate 11.
- the pair of resin holders 23 a and 23 b are accommodating portions that accommodate the pair of motor brushes 25 a and 25 b, and are provided inside the resin plate 22.
- Coil springs 24a and 24b are disposed inside the resin holders 23a and 23b so as to be slidable along the radial direction.
- the motor brushes 25a and 25b are pressed toward the outer peripheral surface of the commutator 71 by the spring force (elastic force) of the coil springs 24a and 24b, and come into contact with the commutator 71.
- the first feeding slip ring 26a and the second feeding slip ring 26b are embedded and fixed on the front end face side of the resin plate 22 in an exposed state.
- the diameter of the first power supply slip ring 26a is smaller than the diameter of the second power supply slip ring 26b, and is arranged inside the second power supply slip ring 26b.
- the first feeding slip ring 26a and the second feeding slip ring 26b form an inner / outer double annular shape.
- the motor brushes 25a and 25b are electrically connected to the first power supply slip ring 26a and the second power supply slip ring 26b by a harness.
- the sealing plate 11 is positioned and fixed by caulking on a concave step formed on the inner periphery of the front end of the motor housing 5.
- FIG. 3 is a view of the cover member 4 as viewed from the front of the valve timing control device.
- the base 28 of the cover member 4 is provided with rectangular openings 30a and 30b in which a pair of power supply brushes 31a and 31b are accommodated.
- the pair of power supply brushes 31a and 31b are electrically connected to terminals (not shown) of the connector portion 33 via a pair of power supply leads.
- the terminal of the connector part 33 is connected to the engine control unit via a harness or the like.
- the pair of power supply brushes 31a and 31b has a rectangular parallelepiped shape extending substantially in the horizontal direction (the axial direction of the electric motor 8), and slides in the axial direction of the electric motor 8 within the openings 30a and 30b of the base 28. It is held freely.
- the pair of power supply brushes 31a and 31b abut on the first power supply slip ring 26a and the second power supply slip ring 26b (see FIG. 1) from the axial direction.
- the pair of power supply brushes 31a and 31b constitutes a part of the power supply mechanism together with the pair of power supply slip rings 26a and 26b.
- each of the power supply brushes 31 a and 31 b is provided with slip rings 26 a and 26 b (see FIG. 1) by the spring force (elastic force) of a pair of torsion springs 32 a and 32 b disposed on the base 28. It is energized towards. As a result, the power supply brushes 31a and 31b come into contact with the slip rings 26a and 26b.
- the valve timing control device is configured to suppress the electromagnetic noise emission generated between the slip rings 26a and 26b and the power supply brushes 31a and 31b when the commutator of the electric motor 8 is switched.
- a noise filter 90 having inductors 100a and 100b that are capacitive elements and capacitors Cy1 and Cy2 that are capacitive elements is provided.
- FIG. 4 is a circuit diagram showing the configuration of the noise filter 90.
- a noise filter 90 is provided between the electric motor 8 and the engine control unit 120.
- the noise filter 90 includes inductors 100a and 100b provided in each DC power line connecting the engine control unit 120 and the electric motor 8, and a Y capacitor.
- the Y capacitor is composed of two capacitors Cy1 and Cy2 that connect the ground terminal and each DC power line.
- the main body of the valve timing control device of the engine (internal combustion engine) is installed directly on the engine, so that the vibration is intense. For this reason, it is necessary to firmly fix the noise filter 90 to the housing constituting the main body of the valve timing control device.
- FIG. 5A is a schematic side view showing the holding structure of the inductors 100a and 100b according to the first embodiment
- FIG. 5B is a schematic cross-sectional view taken along the line vb-vb in FIG. 5A.
- FIG.5 (c) is a schematic diagram which shows the support part 105 of FIG.5 (b). Since the configurations and holding structures of the inductor 100a and the inductor 100b are the same, hereinafter, both will be collectively referred to as the inductor 100, and one of the pair of inductors 100 will be described as a representative. Further, for convenience of explanation, as illustrated, the vertical and horizontal directions of the inductor 100 are defined as illustrated.
- inductor 100 is a solenoid, and has a coil 101 and a linear rod-like shape (in this embodiment, a cylindrical shape) disposed inside coil 101. And a magnetic body 103.
- the coil 101 is a solenoid type coil formed by winding a conductor wire in a spiral around the magnetic body 103. The surface of the conductor wire is covered with a thin insulating layer (not shown).
- Linear lead wires 101x and 101y are provided at both ends of the conductor wire constituting the coil 101.
- the lead wire 101x is welded to the bus bar 108a which is a flat plate-like conductive member
- the lead wire 101y is welded to the bus bar 108b which is a flat plate-like conductive member.
- the coil 101 is mechanically fixed and electrically connected to each of the bus bar 108a and the bus bar 108b.
- the bus bars 108a and 108b are fixed to the respective bus bar support bases 109a and 109b provided integrally with the base 28 of the cover member 4 by insert molding. Note that the bus bar support bases 109a and 109b and the base 28 may be coupled as a separate member by screws or the like.
- a support device 150 that supports both ends of the inductor (solenoid) 100 is provided on the base 28 of the cover member 4.
- the support device 150 includes a pair of support portions 105A and 105B, and the pair of support portions 105A and 105B are integrally provided with the base 28 by resin molding. Note that the support portions 105A and 105B and the base 28 may be coupled as a separate member by screws or the like.
- the pair of support portions 105A and 105B are each formed into a rectangular flat plate shape, and each of the support portions 105A and 105B is formed with a curved surface 107 (see FIG. 5C) that contacts the outer peripheral side surface of the magnetic body 103. .
- the curved surface 107 has an arc shape in which a cross-sectional shape perpendicular to the central axis of the cylindrical magnetic body 103 is fitted to the outer peripheral surface of the magnetic body 103.
- the magnetic body 103 is supported at both ends by a pair of support portions 105A and 105B in a state where both ends are fitted to the curved surface 107.
- the support portion 105 contacts only the magnetic body 103 of the inductor (solenoid) 100 and does not contact the coil 101. Since the support portion 105A and the support portion 105B have the same configuration, hereinafter, they are also collectively referred to as the support portion 105.
- the support portion 105 is provided so as to protrude upward from the reference plane BL of the base 28.
- the magnetic body 103 supported by the support portion 105 and the coil 101 wound around the magnetic body 103 are arranged apart from the reference plane BL.
- a portion of the conductor wire constituting the coil 101 that is wound around the magnetic body 103 (hereinafter referred to as a winding portion 101b) is held in a state of being separated from the base 28 by a predetermined distance. The change in the electrical characteristics of the coil 101 is suppressed.
- Winding portion 101 b is disposed between the pair of support portions 105.
- a distance z1 (that is, the shortest distance between the winding portion 101b and the base 28) between the surface (that is, the lower end surface) facing the reference surface BL of the base 28 among the outer peripheral side surfaces of the winding portion 101b having a cylindrical shape and the reference surface BL. ) Is greater than 0 mm.
- the distance z1 is determined so that a change in electrical characteristics of the coil 101, which will be described later, is small, and is preferably set to be larger than the diameter of the conductor wire, for example.
- An adhesive 106 (for example, an epoxy-based adhesive) is interposed between the curved surface 107 of the support portion 105 and the outer peripheral side surface of the magnetic body 103, and the magnetic body 103 is bonded to the support portion 105. .
- An adhesive 106 is applied to both ends of the winding portion 101b, and both ends of the winding portion 101b are bonded to the magnetic body 103 with the adhesive 106, respectively.
- no adhesive is interposed between the conductor wires constituting the winding portion 101b.
- the epoxy adhesive has a relative magnetic permeability substantially equal to 1, and does not affect the magnetism of the magnetic body 103.
- the conductor wire Prior to assembly, the conductor wire is wound around the magnetic body 103 to produce the inductor 100. Both ends of the winding portion 101 b of the coil 101 and the magnetic body 103 are bonded with an adhesive 106.
- the adhesive 106 is applied to the curved surfaces 107 of the pair of support portions 105A and 105B.
- Both end portions of the magnetic body 103 to which the coil 101 is attached are disposed on the curved surfaces 107 of the pair of support portions 105A and 105B.
- the lead wire 101x and the lead wire 101y provided at both ends of the conductor wire constituting the coil 101 are welded to the bus bar 108a and the bus bar 108b, respectively.
- the proportion of the mass of the magnetic body 103 in the total mass of the inductor (solenoid) 100 is higher than that of other components. For this reason, when a vibration acts on the valve timing control device, the magnetic body 103 is easily displaced as compared with other components. Therefore, in order to firmly fix the inductor (solenoid) 100, it is effective to directly fix the magnetic body 103.
- both end portions of the magnetic body 103 are fitted into the pair of support portions 105, and the magnetic body 103 is fixed by the pair of support portions 105. Further, both ends of the coil 101 spirally wound around the magnetic body 103 are welded to the bus bars 108a and 108b, thereby fixing the magnetic body 103 to the bus bar support bases 109a and 109b via the coil 101. Furthermore, the both ends of the winding part 101b and the magnetic body 103 are adhered by the adhesive 106, and the support part 105 and the magnetic body 103 are adhered by the adhesive 106, whereby the fixing force between the coil 101 and the magnetic body 103 and The fixing force between the magnetic body 103 and the support portion 105 is increased. Thereby, the inductor 100 is firmly fixed to the base 28.
- the inductor 100 constituting the noise filter includes a support device 150 provided on the cover member 4 constituting the casing of the electric valve timing control device, a magnetic body 103 supported by the support device 150, and a magnetic And a coil 101 having a winding portion 101b wound around a body 103.
- the pair of support portions 105 constituting the support device 150 supports the magnetic body 103 so that the outer peripheral side surface of the winding portion 101 b is disposed at a position separated from the cover member 4.
- the inductor 100 constituting the noise filter can be fixed to the in-vehicle device (valve timing control device) without deteriorating the electrical characteristics such as the self-resonant frequency and impedance of the inductor 100.
- FIG. 6 is a diagram illustrating frequency characteristics of impedance.
- the solid line shows the frequency characteristic curve 1102 of the inductor according to the comparative example fixed by a resin mold made of epoxy resin.
- the broken line shows the frequency characteristic curve 1101 of the inductor 100 according to the present embodiment that is not resin-molded.
- the frequency characteristic shown in FIG. 6 is made of Ni—Zn ferrite as an example, and a 1 mm diameter enameled wire (2UEW1.0) is 15.5 turns against a cylindrical magnetic body 103 having a diameter of 7 mm and a length of 20 mm. This is a frequency characteristic of the wound inductor.
- the frequency characteristic curve 1101 of the inductor 100 according to the present embodiment has an upwardly convex peak (self-resonant frequency) in the vicinity of a frequency of 40 MHz, and has an impedance of about several hundreds of ⁇ at about 10 MHz or more.
- the frequency characteristic curve 1102 of the inductor according to the comparative example has an upward peak near 10 MHz and a downward peak near 56 MHz, and the impedance of about 20 MHz to 90 MHz is less than 100 ⁇ . . That is, in the resin-molded comparative example, the self-resonant frequency is reduced by about 40% and the impedance is lowered in a wide frequency band (20 MHz to 90 MHz) as compared with the case where the resin is not molded (this embodiment).
- the filter characteristics fluctuate before and after the molding, so that the design specification of the original electrical characteristics of the noise filter cannot be achieved, that is, the target noise is suppressed. It may not be possible.
- the inductors according to the present embodiment and the comparative example have a winding structure in addition to an inductance component (inductive component) and a resistance component provided in a conductor wire, so that a parasitic capacitance component (capacitance) is provided between the windings. Component) occurs. Molding the coil 101 with resin means that the stray capacitance between lines (parasitic capacitance) changes when the resin enters between the conductor wires constituting the winding portion 101b. For this reason, as shown in FIG. 6, the electrical characteristics such as the self-resonant frequency and impedance of the inductor differ between the present embodiment that is not resin-molded and the comparative example that is resin-molded. In the present embodiment, since the mold resin does not enter the gap between the conductor wires in the winding portion 101b of the coil 101, it can be avoided that the electrical characteristics of the inductor are changed from the initial characteristics.
- Patent Document 1 discloses a structure in which a coil is fixed in a pressed state by an insulating fixture attached to a housing instead of fixing the coil with a mold resin.
- the coil winding part is mechanically pressed directly, when vibration or impact is applied to the inductor, friction between the coil insulating layer (insulating coating) and the fixing member (pressing member) is caused. Otherwise, the insulating layer may be damaged and a short circuit may occur.
- the outer peripheral side surface of the winding portion 101b is not directly pressed and fixed, but the magnetic body 103 is held by the pair of support portions 105 at a position where the winding portion 101b is separated from the base 28. Supporting structure is adopted. Thereby, the short circuit resulting from the failure
- the parasitic capacitance between the conductor wires of the winding part 101b can be reduced through the member for pressing in the same way as when fixing with the mold resin described above. May change.
- the change in the parasitic capacitance becomes smaller as the distance between the winding portion 101b and the structure adjacent to the winding portion 101b increases.
- the shortest distance z1 between the reference plane BL of the base 28 and the winding portion 101b of the coil 101 so that the change of the electrical characteristics of the inductor from the initial characteristics (design specifications) is within an allowable range. Is set.
- the inductor 100 can be fixed to the cover member 4 of the valve timing control device without deteriorating the electrical characteristics such as the self-resonant frequency and impedance of the inductor 100.
- the heat dissipation is better than when the coil 101 is covered with the mold resin.
- Both end portions of the magnetic body 103 are fitted into the pair of support portions 105A and 105B, respectively. Since the magnetic body 103 can be fixed with a simple configuration, it is easy to assemble.
- the noise filter of the vehicle-mounted apparatus which concerns on 2nd Embodiment is demonstrated.
- the same reference numerals are assigned to the same or corresponding parts as those in the first embodiment, and the differences will be mainly described.
- the structure in which the curved surface 107 of the support portion 105 and the outer peripheral side surface of the magnetic body 103 are fitted and the magnetic body 103 is supported by the support portion 105 has been described.
- the second embodiment not only the outer peripheral side surface of the magnetic body 103 but also one end surface of the magnetic body 103 is supported by the support portion 205A.
- FIG. 7A is a schematic side view showing the holding structure of the inductor 100 according to the second embodiment
- FIG. 7B is a schematic cross-sectional view taken along the line viib-viib in FIG. 7A.
- FIG.7 (c) is the figure which looked at the support part 205A of FIG.7 (b) from the opposite side to FIG.7 (b).
- the support device 250 according to the second embodiment differs from the support device 150 according to the first embodiment in that a support portion 205A is provided instead of the support portion 105A according to the first embodiment. Other configurations are the same.
- the support portion 205A is provided with a fitting recess 207 into which one end of the magnetic body 103 is fitted.
- the fitting recess 207 has a curved surface 207 a that fits on the outer peripheral side surface of the magnetic body 103 and a semicircular flat surface 207 b that abuts on the end face in the axial direction of the magnetic body 103.
- the left end portion of the magnetic body 103 is fitted into the fitting recess 207 of the support portion 205A, and the outer peripheral side surface and the axial end surface of the left end portion of the magnetic body 103 are covered with the support portion 205A.
- Adhesive 106 is applied in advance to the curved surface 207a and the flat surface 207b of the fitting recess 207, and by fitting the left end portion of the magnetic body 103 into the fitting recess 207, the fitting recess 207 of the support portion 205A. And the left end of the magnetic body 103 are bonded by an adhesive 106.
- the end face 205c on the winding part 101b side of the support part 205A is in contact with the left end of the winding part 101b via the adhesive 106.
- the magnetic body 103 can be more firmly fixed. Note that the change in electrical characteristics due to the end surface of the winding portion 101b coming into contact with the support portion 205A is small.
- At least one end of both ends of the winding part 101b is in contact with one support part 205A of the pair of support parts 205A and 105B constituting the support device 250 in the axial direction.
- At least one end of both ends of the magnetic body 103 is in contact with one support portion 205A of the pair of support portions 205A and 105A constituting the support device 250 in the axial direction.
- the contact area between the support portion 205A and the magnetic body 103 is greater than that in the first embodiment. Can be increased. Thereby, the fixing force by fitting and adhesion between the support portion 205A and the magnetic body 103 can be further improved.
- FIG. 8A is a schematic side view showing the holding structure of the inductor 100 according to the third embodiment
- FIG. 8B is a schematic cross-sectional view taken along the line viii-viib in FIG. 8A.
- the shape of the lead wire 301y of the coil 101 is different from the shape of the lead wire 101y of the second embodiment, but the other configurations are the same.
- a lead wire 301 y constituting the right end portion of the coil 101 restrains the right end portion of the magnetic body 103.
- the lead wire 301y includes a magnetic material contact portion 381 that contacts the upper portion of the magnetic material 103, and an end surface support portion 382 that is bent 90 degrees from the end of the magnetic material contact portion 381 and extends toward the reference surface BL of the base 28. And a bus bar connecting portion 383 that is bent 90 degrees from the end portion of the end surface support portion 382 and extends toward the bus bar 108b.
- the bus bar 108b is fixed to a bus bar support 309b having a small height as compared with the second embodiment.
- the bus bar connection portion 383 is connected to the bus bar 108b by welding.
- the end surface support portion 382 is in contact with the right end surface of the magnetic body 103 and urges the magnetic body 103 leftward by the elastic force of the conductor wire. For this reason, the left end surface of the magnetic body 103 is pressed against the flat surface 207b of the support portion 205A described above. That is, the magnetic body 103 is sandwiched between the flat surface 207b of the support portion 205A and the end surface support portion 382 of the lead wire 301y.
- the support body 409a has a function of supporting the bus bar 108a and a function of supporting the magnetic body 103. Since the support body 409a has higher bending rigidity than the rectangular flat plate-shaped support portion 205A having a relatively small thickness, the inductor 100 can be held more stably.
- Modification 2 In the second embodiment, the example in which the support portion 205A that covers one end surface of the both end surfaces in the axial direction of the magnetic body 103 is provided has been described, but the present invention is not limited to this. You may make it support both the both end surfaces of the magnetic body 103 with a support part. That is, the magnetic body 103 may be sandwiched between a pair of support portions. Thereby, compared with 2nd Embodiment, the movement of the axial direction of the magnetic body 103 can be controlled more effectively. As shown in FIG. 9B, as in the first modification, the pair of support portions that support both ends of the magnetic body 103 are integrated with the pair of bus bar support bases, respectively. 409a and 409b may be used.
- the holding structure (see FIG. 8) of the magnetic body 103 by the lead wire 301y of the coil 101 according to the third embodiment is the above-described modification 1 (see FIG. 9A) or modification 2 (FIG. 9B). ))).
- the lead wire 101x (the left end portion of the coil 101 in the drawing) of the coil 101 according to the third embodiment may have the same structure as the lead wire 301y (the right end portion of the coil 101 in the drawing).
- an inductor 500 including an annular magnetic body 503 and a toroidal coil 501 formed by winding a conductor wire in a spiral shape around the magnetic body 503 may be configured as a noise filter.
- the pair of support portions 505A and 505B are arranged so that the pair of support portions 505A and 505B constituting the support device 550 and the coil 501 do not interfere with each other.
- the pair of support portions 505A and 505B can include, for example, a rectangular flat plate-like base portion 531 and a U-shaped curved portion 532 that is divided into two branches from the upper end of the base portion 531.
- (Modification 7) In the above-described embodiment, the example in which the support devices 150 and 250 are configured by a pair of support portions has been described, but the present invention is not limited to this.
- You may comprise a support apparatus by three or more support parts. For example, a region where the winding portion 101b is not disposed is provided in the central portion of the rod-shaped magnetic body 103, and three portions of one end portion of the magnetic body 103, the other end portion of the magnetic body 103, and the central portion of the magnetic body 103 are arranged in three locations. You may make it support with a support part. You may comprise a support apparatus by one support part.
- a sufficient contact area with the support portion 103 may be ensured, and only the central portion of the magnetic body 103 may be supported by one support portion.
- One support portion may be bifurcated, and the both ends of the magnetic body 103 may be supported by the branched portions.
- the valve timing control device has been described as an example of the in-vehicle device, but the present invention is not limited to this.
- the present invention can be applied to various in-vehicle devices.
- the present invention can be applied to a noise filter (inductor) in an in-vehicle device such as a skid prevention device (ESC) or an anti-lock brake system (ABS).
- ESC skid prevention device
- ABS anti-lock brake system
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Abstract
Description
-第1の実施の形態-
図1は車載装置の一例であるエンジン(内燃機関)のバルブタイミング制御装置の縦断面模式図であり、図2はバルブタイミング制御装置の分解斜視図である。なお、説明の便宜上、図示するようにバルブタイミング制御装置の前後方向を規定する。バルブタイミング制御装置は、自動車の燃費向上や二酸化炭素の排出量を低減するために、エンジンの回転数や負荷に適した燃焼状態となるよう、燃焼室給気量を制御するために、エンジンバルブの開閉タイミングを自在に可変する装置である。
(i)一対の支持部105A,105Bの湾曲面107に接着剤106を塗布する。
(ii)コイル101が装着された磁性体103の両端部を、一対の支持部105A,105Bの湾曲面107上に配置する。
(iii)コイル101を構成する導体線の両端に設けられた引出し線101xおよび引出し線101yを、それぞれバスバー108aおよびバスバー108bに溶接する。
(1)ノイズフィルタを構成するインダクタ100は、電動式のバルブタイミング制御装置の筐体を構成するカバー部材4に設けられた支持装置150と、支持装置150によって支持された磁性体103と、磁性体103に巻回された巻線部101bを有するコイル101とを備えている。支持装置150を構成する一対の支持部105は、巻線部101bの外周側面がカバー部材4から離隔した位置に配置されるように、磁性体103を支持している。
図7を参照して、第2の実施の形態に係る車載装置のノイズフィルタについて説明する。なお、図中、第1の実施の形態と同一もしくは相当部分には同一の参照番号を付し、相違点を主に説明する。第1の実施の形態では、支持部105の湾曲面107と磁性体103の外周側面とを嵌合させて、磁性体103を支持部105により支持する構造について説明した。これに対して、第2の実施の形態では、磁性体103の外周側面だけでなく、磁性体103の一端面を支持部205Aによって支持する。
(6)巻線部101bの両端のうちの少なくとも一端が支持装置250を構成する一対の支持部205A,105Bのうちの一方の支持部205Aに軸方向で当接している。これにより、磁性体103の軸方向の移動を規制する効果をより向上できる。
図8を参照して、第3の実施の形態に係る車載装置のノイズフィルタについて説明する。なお、図中、第2の実施の形態と同一もしくは相当部分には同一の参照番号を付し、相違点を主に説明する。図8(a)は第3の実施の形態に係るインダクタ100の保持構造を示す側面模式図であり、図8(b)は図8(a)のviiib-viiib線断面模式図である。
(9)コイル101の一端(図中右端)と、一対の支持部205A,105Bのうちコイル101の上記一端とは反対側に配置される支持部205Aとによって、磁性体103の軸方向の両端面を挟持するようにした。これにより、第2の実施の形態に比べて、さらに軸方向の移動を強固に規制することができる。
(変形例1)
第2の実施の形態では、支持部205Aとバスバー支持台109aとがそれぞれベース28の基準面BLから上方に向かって突出している例、すなわち支持部205Aとバスバー支持台109aとが別体としてカバー部材4に突設されている例について説明したが、本発明はこれに限定されない。たとえば、図9(a)に示すように、支持部205Aとバスバー支持台109aとを一体とさせた支持体409aを設けてもよい。つまり、支持体409aは、バスバー108aを支持する機能と、磁性体103を支持する機能とを有する。支持体409aは、比較的厚みの薄い矩形平板状の支持部205Aに比べて曲げ剛性が高いため、インダクタ100をより安定して保持することができる。
第2の実施の形態では、磁性体103の軸方向の両端面のうち、一端面を覆う支持部205Aを設ける例について説明したが、本発明はこれに限定されない。磁性体103の両端面の双方を支持部で支持するようにしてもよい。つまり、磁性体103を一対の支持部により挟持してもよい。これにより、第2の実施の形態に比べて、磁性体103の軸方向の移動をより効果的に規制できる。なお、図9(b)に示すように、さらに、上記変形例1と同様、磁性体103の両端部を支持する一対の支持部のそれぞれを一対のバスバー支持台と一体として、一対の支持体409a,409bとしてもよい。
第3の実施の形態に係るコイル101の引出し線301yによる磁性体103の保持構造(図8参照)は、上述した変形例1(図9(a)参照)や変形例2(図9(b)参照)の構造に適用してもよい。さらに、第3の実施の形態に係るコイル101の引出し線101x(コイル101の図中左端部)を引出し線301y(コイル101の図中右端部)と同様の構造としてもよい。
上述した実施の形態では、一対の支持部105A,205A,105Bをカバー部材4に突設させ、カバー部材4の基準面BL側から磁性体103を支持する例について説明したが、本発明はこれに限定されない。たとえば、磁性体103の軸方向に一対の支持部を設け、磁性体103の軸方向両側から磁性体103を挟持するようにして磁性体103を支持してもよい。磁性体103をカバー部材4の基準面BL側とは反対側から支持してもよい。たとえば、図5に示すバスバー支持台109aの支持板(バスバー108aの固着部)を右方向に延ばし、支持板の右端部から磁性体103に向けて90度屈曲させて、磁性体103を上側から支持する支持部を設けるようにしてもよい。
上述した実施の形態では、直線状の棒状の磁性体と、導体線が磁性体103に螺旋状に巻回されたソレノイド型のコイル101とを備えるインダクタを例について説明したが、インダクタの構成はこれに限定されない。たとえば、図10に示すように、円環状の磁性体503と、導体線を磁性体503に螺旋状に巻回してなるトロイダル型のコイル501とを備えるインダクタ500をノイズフィルタとして構成してもよい。この場合、支持装置550を構成する一対の支持部505A,505Bとコイル501とが干渉しないように、一対の支持部505A,505Bを配置する。一対の支持部505A,505Bは、たとえば、矩形平板状の基部531と、基部531の上端から二股に分かれたU字状の湾曲部532とを備える構成とすることができる。
上述した実施の形態では、接着剤106を用いる例について説明したが、本発明はこれに限定されない。磁性体103を支持部105A,105B,205Aに圧入することでインダクタを強固に固定できる場合や、図8に示すように、コイル101の右端部と支持部205Aとで磁性体103を挟持することで、インダクタを強固に固定できる場合には、接着剤106を省略してもよい。
上述した実施の形態では、支持装置150,250が一対の支持部により構成される例について説明したが本発明はこれに限定されない。3つ以上の支持部により支持装置を構成してもよい。たとえば、棒状の磁性体103の中央部に巻線部101bを配置しない領域を設け、磁性体103の一端部、磁性体103の他端部、および磁性体103の中央部の3箇所を3つの支持部で支持させてもよい。1つの支持部により支持装置を構成してもよい。たとえば、磁性体103の中央部において、支持部103との十分な接触面積を確保して、磁性体103の中央部のみを1つの支持部で支持させてもよい。1つの支持部を二股に分岐させて、磁性体103の両端部を分岐させた部分で支持させてもよい。
上述した実施の形態では、バルブタイミング制御装置を車載装置の一例として説明したが、本発明はこれに限定されない。種々の車載装置に本発明を適用できる。たとえば、横滑り防止装置(ESC)や、アンチロックブレーキシステム(ABS)などの車載装置におけるノイズフィルタ(インダクタ)に本発明を適用できる。
日本国特許出願2015年第186935号(2015年9月24日出願)
Claims (8)
- 車載装置の筐体に設けられた支持装置と、
前記支持装置によって支持された磁性体と、
前記磁性体に巻回された巻線部を有するコイルとを備え、
前記支持装置は、前記巻線部の外周側面が前記筐体から離隔した位置に配置されるように、前記磁性体を支持している、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記コイルは、前記巻線部の両端から延在する引出し線が、前記筐体の一部に固定されている、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記巻線部の両端のうちの少なくとも一端が前記支持装置に当接している、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記支持装置は、前記磁性体の両端部のそれぞれと嵌合する2つの支持部を備えている、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記支持装置は、前記コイルの一端とは反対側に配置される支持部を備え、
前記コイルの一端とは反対側に配置される支持部と、前記コイルの一端とによって、前記磁性体を挟持している、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記磁性体は直線状の棒状であり、
前記コイルは、前記磁性体に螺旋状に巻回されたソレノイド型のコイルとされている、車載装置のノイズフィルタ。 - 請求項1に記載の車載装置のノイズフィルタにおいて、
前記磁性体は円環状であり、
前記コイルは、前記磁性体に螺旋状に巻回されたトロイダル型のコイルとされている、車載装置のノイズフィルタ。 - 請求項1ないし7のいずれか一項に記載の車載装置のノイズフィルタを備えた車載装置。
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US15/738,021 US20180304826A1 (en) | 2015-09-24 | 2016-03-15 | Noise filter of vehicle-mounted device and vehicle-mounted device |
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TWI464981B (zh) * | 2009-10-06 | 2014-12-11 | Delta Electronics Inc | 電源濾波器 |
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JP5966026B2 (ja) * | 2015-01-13 | 2016-08-10 | 矢崎総業株式会社 | ハーネスのノイズフィルタ構造 |
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2016
- 2016-03-15 CN CN201680037604.0A patent/CN107710356A/zh active Pending
- 2016-03-15 WO PCT/JP2016/058081 patent/WO2017051551A1/ja active Application Filing
- 2016-03-15 US US15/738,021 patent/US20180304826A1/en not_active Abandoned
- 2016-03-15 JP JP2016571357A patent/JPWO2017051551A1/ja not_active Ceased
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JPS5984918U (ja) * | 1982-11-26 | 1984-06-08 | 東北金属工業株式会社 | ノイズフイルタ |
JPH0226116A (ja) * | 1988-07-14 | 1990-01-29 | Tdk Corp | ノイズフイルタ装置及びその製造方法 |
JP2004095570A (ja) * | 2002-08-29 | 2004-03-25 | Toyota Motor Corp | リアクトル装置およびその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021152888A1 (ja) * | 2020-01-28 | 2021-08-05 | 株式会社日立製作所 | ノイズフィルタ、ノイズフィルタ装置、および電力変換装置 |
JP2021118476A (ja) * | 2020-01-28 | 2021-08-10 | 株式会社日立製作所 | ノイズフィルタ、ノイズフィルタ装置、および電力変換装置 |
JP7454952B2 (ja) | 2020-01-28 | 2024-03-25 | 株式会社日立製作所 | ノイズフィルタおよび電力変換装置 |
Also Published As
Publication number | Publication date |
---|---|
US20180304826A1 (en) | 2018-10-25 |
JPWO2017051551A1 (ja) | 2017-09-28 |
CN107710356A (zh) | 2018-02-16 |
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