WO2017057122A1 - フィルムコンデンサ、連結型コンデンサ、インバータおよび電動車輌 - Google Patents
フィルムコンデンサ、連結型コンデンサ、インバータおよび電動車輌 Download PDFInfo
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- WO2017057122A1 WO2017057122A1 PCT/JP2016/077794 JP2016077794W WO2017057122A1 WO 2017057122 A1 WO2017057122 A1 WO 2017057122A1 JP 2016077794 W JP2016077794 W JP 2016077794W WO 2017057122 A1 WO2017057122 A1 WO 2017057122A1
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- film capacitor
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Classifications
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- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
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- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/02—Machines for winding capacitors
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- H—ELECTRICITY
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
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- H01G4/002—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
- H01G4/18—Organic dielectrics of synthetic material, e.g. derivatives of cellulose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the metal core is used without being removed.
- Metal cores have good heat conduction, high thermal strength and mechanical strength, so they have excellent heat dissipation and little loosening and deformation of metallized film even when used at relatively high temperatures. It was also easy to use the core of this, and it was possible to wind up a metallized film with high hardness.
- the connected capacitor of the present disclosure is formed by connecting a plurality of the above-described film capacitors with a bus bar.
- the inverter according to the present disclosure includes a bridge circuit configured by a switching element and a capacitor connected to the bridge circuit, and the capacitor is the above-described film capacitor or connected capacitor.
- the electric vehicle of the present disclosure includes a power source, the above-described inverter connected to the power source, a motor connected to the inverter, and wheels driven by the motor.
- the film capacitor of 1st Embodiment is shown typically, (a) is yz longitudinal cross-sectional view of a main body, (b) is xz longitudinal cross-sectional view of a modification, (c) is a core of FIG.4 (b). (D) is a side view which shows the end surface of the core of the further modification.
- the film capacitor of 2nd Embodiment is shown typically, (a) is a cross-sectional view of a main body, (b) is a cross-sectional view explaining the dimension of a core, (c) is a perspective view of a core. is there. It is sectional drawing which shows an example of the core element body of 2nd Embodiment.
- FIG. 1 schematically shows an example of the configuration of a film capacitor A having an elliptical cross section, where (a) is a side view, (b) is a developed perspective view, and (c) is a cross sectional view of a core body. It is.
- Each drawing has xyz coordinate axes for ease of explanation.
- the film capacitor A includes a main body 5, a first terminal electrode 6a, and a second terminal electrode 6b as shown in FIG.
- metallized films 3a and 3b are overlapped as shown in FIG. 1B, and are wound around a core body 4 made of an insulating material.
- the metallized film 3a is provided with an electrode film 2a on one surface of the dielectric film 1a
- the metallized film 3b is provided with an electrode film 2b on one surface of the dielectric film 1b.
- the first terminal electrode 6a is located on one end face of the body 5 in the axial length direction (z direction) of the core body 4, and the second terminal electrode 6b is on the other end face. Is located.
- the first terminal electrode 6a is electrically connected to the electrode film 2a
- the second terminal electrode 6b is electrically connected to the electrode film 2b.
- the dielectric films 1a and 1b and the electrode films 2a and 2b are made thicker from the back to the front of FIG. In practice, these thicknesses are constant.
- the description of the first and second terminal electrodes 6a and 6b is omitted.
- the metallized film 3a has, on one surface of the dielectric film 1a, a portion having the electrode film 2a and a portion (hereinafter referred to as a dielectric film exposed portion) 15a where the dielectric film 1a is exposed. .
- the dielectric film exposed portion 11a is provided on one end side in the width direction (z direction) of the metallized film 3a so as to be continuous in the longitudinal direction.
- the metallized film 3b has, on one surface of the dielectric film 1b, a portion having the electrode film 2b and a portion (hereinafter referred to as a dielectric film exposed portion) 15b where the dielectric film 1b is exposed. .
- the dielectric film exposed portion 15b is provided on one end side in the width direction (z direction) of the metallized film 3b so as to be continuous in the longitudinal direction.
- the metallized films 3a and 3b are overlapped so that the dielectric film exposed portions 15a and 15b are located on different sides in the width direction (z direction) of the metallized films 3a and 3b.
- the metallized films 3a and 3b are in a state where the other ends in the width direction (z direction) (ends having the electrode films 2a and 2b) are shifted so as to protrude in the width direction (z direction), respectively. It ’s been repeated. That is, as for the main body 5, metallized film 3a, 3b is laminated
- the core body 4 has a cross section perpendicular to the axial length direction (z direction) (hereinafter sometimes referred to as a transverse cross section) having an oval outer periphery 7 and an inner periphery 8.
- the outer periphery 7 has a major axis d1 and a minor axis d2.
- the inner periphery 8 forms a slit 9 along the major axis d1.
- the slit 9 is a narrow gap (slit, cut) in the core body 4 formed inside the inner periphery 8.
- the cross section of the core body 4 has an elliptical outer periphery 7 and an inner periphery 8 that forms a slit 9 along the major axis.
- the major axis of the elliptical shape coincides with the x direction and the minor axis coincides with the y direction, the length of the major axis is d1, and the length of the minor axis is d2.
- FIG. 2C is a perspective view of the core body 4.
- the outer periphery 7 has a convex shape. What is necessary is just to be formed by the curve made.
- the outer periphery 7 of the cross section of the core body 4 is elliptical, local bending of the core body 4 and the metallized films 3a and 3b and loosening of the metallized films 3a and 3b are suppressed, and the metallized film 3a. 3b is less likely to generate a gap.
- the metallicon that is the constituent material of the first and second terminal electrodes 6a and 6b is less likely to enter the gap between the metallized films 3a and 3b, and the film capacitor A has a low short-circuit rate and high insulation. Can do. What is necessary is just to confirm the shape of the cross section of such a core body 4 by image-processing the photograph of the cross section of the core body 4, for example.
- Such a film capacitor A can be manufactured as follows, for example.
- a tubular body is prepared in which the thickness in the x direction in the cross section is smaller than the thickness in the y direction.
- a cross section of the core element has a circular outer periphery and an elliptical inner periphery, and an elliptical outer periphery as shown in FIG. Those having a circular inner periphery are used.
- an insulating organic resin material may be used as the material of the core element.
- an insulating organic resin material may be used.
- PP polypropylene
- POM polyacetal
- PA polyamide
- PET polyethylene terephthalate
- PPS polyphenylene sulfide
- PTFE polytetrafluoroethylene
- PEEK polyether ether ketone
- the main body 5 which is the obtained wound body is pressed together with the core element body and flattened into a shape as shown in FIG.
- the pressing direction is set to the y direction where the thickness of the core element is thick, so that the core element has an elliptical outer periphery 7 having a major axis d1 and a minor axis d2 and a major axis d1.
- the core body 4 which has the inner periphery 8 which forms the slit 9 along.
- the slit 9 here refers to a thin gap between the inner peripheries 8 that are closely opposed to each other, and is separated from the outer periphery 7.
- Such a core body 4 is composed of a curve whose entire outer periphery 7 is convex in the radial direction. Further, as shown in FIG. 2B, the thickness on the major axis of the cross section (thickness between the outer periphery 7 in the x direction and the slit 9, t1) is the thickness on the minor axis (in the y direction). The thickness between the outer periphery 7 and the slit 9 is smaller than t2). When t1 is smaller than t2, when the main body 5 is pressed, the core body is greatly deformed at the portion where the thickness is small (t1), and there is no significant deformation at the portion where the thickness is large (t2).
- the ratio of the length of the major axis d1 to the minor axis d2 of the core body 4 is preferably in the range of 0.05 to 0.5 as a ratio (d2 / d1).
- (d2 / d1) By setting (d2 / d1) to 0.05 or more, the thickness of the core body 4 is ensured, and the effect of improving the dimensional accuracy during flattening is obtained. Further, by setting (d2 / d1) to 0.5 or less, the volume of the core body 4 can be suppressed to be small, and space saving of the element can be realized.
- FIG. 4A is a cross-sectional view of the main body 5 viewed from the x-axis direction
- FIG. 4B is a cross-sectional view of the main body 5 viewed from the y-direction.
- the inner periphery 8 of the transverse cross section of the core body 4 has inner peripheries 8 facing each other in the minor axis direction (y direction) at least near the center in the axis length direction (z direction).
- the slit 9 is closed by contact.
- the insulating member 10 is disposed at least near the center in the axial length direction (z direction) in the slit 9 and the slit 9 is closed.
- Fig. 4 (c) is a perspective view of the core body 4 shown in Fig. 4 (b).
- the inner periphery 8 abuts at least near the center in the axial direction (z direction), or the insulating member 10 is disposed at least near the center in the axial direction (z direction) in the slit 9.
- the gap 9 is not communicated in the axial length direction (z direction) of the core body 4. Accordingly, the first terminal electrode 6a and the second terminal electrode 6b are prevented from conducting through the gap of the slit 9 by the metallicon treatment, and the short-circuit rate can be reduced.
- the position of the portion where the slit 9 is closed (hereinafter referred to as the slit closed portion) is not limited to the vicinity of the center in the axial length direction (z direction).
- the slit closing part may be disposed near any end in the axial length direction (z direction) as long as the slit 9 is disposed so as not to communicate with the axial length direction (z direction).
- occlusion part may be divided
- the core body 4 preferably has openings 11 formed by slits 9 at both ends in the axial length direction (z direction). Since the core body 4 has the openings 11 at both ends, the metallicon enters the openings 11 when forming the external electrodes, and an anchor effect is obtained. By this anchor effect, an effect of improving the bonding strength between the main body 5 and the first and second terminal electrodes 6a and 6b is obtained.
- the openings 11 do not penetrate in the axial length direction (z direction), that is, the openings 11 located at both ends are not connected to each other. That is, as shown in FIG. 4 (d), at both ends in the axial length direction (z direction) of the core body 4, the slit 9 has an opening 11 only at the end portion in the long diameter direction (x direction). It is good to close in the vicinity of the center in the direction (x direction).
- the core body 4 has a pair of linear shapes having a cross section perpendicular to the axial length (z direction) (hereinafter sometimes referred to as a transverse cross section).
- the outer periphery 7 having a long side 7a and a pair of short sides 7b, and the inner periphery 8 that forms a slit along the long side 7a inside the outer periphery 7 are provided.
- the direction parallel to the long side 7a is the x direction
- the direction perpendicular to the long side 7a is the y direction
- the length of the long side 7a is L1
- the length of the short side 7b is L2 (FIG. 5B).
- the slit formed by the inner periphery 8 has a pair of bulging portions 12 that are gaps along the long side 7a and at both ends in the x direction.
- FIG. 5C is a perspective view of the core body 4.
- the shape of the outer periphery 7 may be referred to as a rounded rectangular shape.
- the rounded rectangular shape refers to a rectangular shape having a pair of long sides and a pair of short sides and rounded corners.
- the long side 7a is constituted by a straight line
- the short side 7b connecting the opposing long sides 7a has an arc shape protruding outward in the axial length direction (z-axis direction).
- the long side 7a is linear, but may be slightly outwardly convex.
- the short side 7b is good to be comprised by the curve which makes an outward convex arc shape, you may have a linear part.
- the long sides 7a facing each other are preferably parallel to each other, but may have a slight angle. Further, the opposing long sides 7a may have the same length, but may have different lengths. In this embodiment, the outer periphery 7 does not have an indented portion.
- the outer periphery 7 of the cross section of the core body 4 is a rounded rectangular shape, local bending of the core body 4 and the metallized films 3a and 3b and loosening of the metallized films 3a and 3b are suppressed, and metallization is achieved. Air gaps are less likely to occur between the films 3a and 3b. As a result, the metallicon that is the constituent material of the first and second terminal electrodes 6a and 6b is less likely to enter the gap between the metallized films 3a and 3b, and the film capacitor A has a low short-circuit rate and high insulation. Can do. What is necessary is just to confirm the shape of the cross section of such a core body 4 by image-processing the photograph of the cross section of the core body 4, for example.
- Such a film capacitor A can be manufactured as follows, for example.
- a tubular body is prepared in which the thickness in the x direction in the cross section is smaller than the thickness in the y direction.
- the core element has a circular outer periphery and an inner periphery having different radii in the x and y directions.
- the material of the core element body may be the same as that of the first embodiment.
- This metal core is laminated and wound with metallized films 3a and 3b in the same manner as in the first embodiment to obtain a wound body.
- the obtained main body 5 which is a wound body is pressed together with the core element body and flattened into a shape as shown in FIG.
- the pressing direction is set to the y direction where the thickness of the core element is thick, so that the core element has a rounded rectangular shape in which the cross section includes a pair of linear long sides 7a and a pair of short sides 7b.
- a core body 4 having a cylindrical outer periphery 7 and an inner periphery 8 that forms a slit 9 along the long side 7a and having a pair of bulge portions 12 at both ends.
- the slit 9 here refers to a thin gap between the inner peripheries 8 that are closely opposed to each other, and is separated from the outer periphery 7.
- the entire outer periphery 7 is composed of a pair of linear long sides 7a and a pair of short sides 7b. Further, as shown in FIG. 5B, the thickness (thickness on the major axis, t1) of the short side 7b of the cross section is the thickness (thickness on the minor axis, t2) on the long side 7a. Will be smaller. When t1 is smaller than t2, when the main body 5 is pressed, the core body is greatly deformed at the portion where the thickness is small (t1), and there is no significant deformation at the portion where the thickness is large (t2).
- the bulging portion 12 forms a teardrop-shaped void having an arc along the short side 7b.
- the bulging part 12 makes such a teardrop shape, it can be set as the core 4 with small local deformation
- the bulging portion 12 that is a teardrop-shaped gap is formed in a portion where the thickness of the core body 4 is small, so that the wall thickness is increased. It is possible to suppress local deformation (hereinafter, simply referred to as local deformation of the core body 4) in another part having a large diameter.
- the shape of the cross section of the bulging portion 12 is preferably a teardrop shape, but is a shape (circle / elliptical shape, diamond shape, triangular shape, etc.) as shown in FIGS. Also good.
- Such a shape can be obtained by designing the shape of the inner periphery of the core body so as to have the shape described above after pressing.
- the length of the entire outer periphery 7 of the core body 4 is L0
- the length of the long side 7a is L1
- the length of the short side 7b is L2
- the direction perpendicular to the long side 7a of the core body 4 The length (minor axis) in the (y direction) is d2.
- the value of the formula P (L2 / L1) ⁇ (L0 / ( ⁇ ⁇ d2) ⁇ 1) is in the range of 0.8 to 1.2, particularly in the range of 0.9 to 1.1. It is preferable.
- P is a parameter relating to the shape of the cross section of the core body 4, and local deformation of the core body 4 can be further suppressed by setting P within this range.
- the thickness t1 at the short side 7b is 0.2 (t1 / d2) with respect to the length (minor diameter) d2 in the direction (y direction) perpendicular to the long side 7a. It is preferably in the range of ⁇ 0.3.
- t1 / d2 in the range of 0.2 to 0.3, local deformation of the core body 4 can be further suppressed.
- t1 / d2 is smaller than 0.2, the boundary between the long side 7a portion and the short side 7b portion is deformed in the initial stage of the press, and a gap between the metallized films tends to occur.
- t1 / d2 is larger than 0.3, the long side 7a part is deformed at the initial stage of pressing, and there is a tendency that a gap between the metallized films is easily generated.
- t1 / d2 is particularly preferably in the range of 0.23 to 0.27.
- the inner periphery 8 of the cross section of the core body 4 is a portion facing each other along the long side 7a, that is, a portion facing each other via the slit 9 (two It is preferable that the slit 9 is closed by abutment between the bulging portions 12.
- the opposing inner circumferences 8 may be in contact with each other over the entire axial length direction (z direction). However, as shown in FIG. 8A, the inner circumferences facing each other in at least a part of the axial length direction (z direction). The circumference 8 may abut.
- FIG. 8A is a cross-sectional view of the main body 5 at the center of the core body 4 in the x direction.
- the gap between the slits 9 formed by the inner periphery 8 does not have to penetrate from one end to the other end in the axial length direction (z direction).
- the inner peripheries 8 facing each other in at least a part of the z direction abut, and the gap of the slit 9 is closed without penetrating from one end to the other end in the axial length direction (z direction). Even if the metallicon forming the terminal electrodes 6a and 6b enters the gap of the slit 9, the first terminal electrode 6a and the second terminal electrode 6b are prevented from conducting through the gap of the slit 9, and the short-circuit rate can be reduced. .
- the position of the portion where the slit 9 is closed may be near the center in the axial length direction (z direction).
- the slit 9 is provided so as not to penetrate in the axial length direction (z direction), it may be in the vicinity of any end in the axial length direction (z direction).
- occlusion part may be divided
- the opening part 11 of the slit 9 formed with the inner periphery 8 may exist in the both ends of an axial length direction (z direction).
- the metallicon enters the opening 11 of the slit at the end in the axial direction (z direction), and an anchor effect is obtained.
- an anchor effect an effect of improving the bonding strength between the main body 5 and the first and second terminal electrodes 6a and 6b is obtained.
- FIG. 8B is a cross-sectional view of the main body 5 perpendicular to the x direction showing the bulging portion 12
- FIG. 8C is a perspective view of the core body 4 shown in FIG. 8B.
- the bulging portion 12 is preferably such that the insulating member 10 is disposed in the gap of the bulging portion 12 and the bulging portion 12 is closed.
- the gap of the bulging portion 12 does not communicate from one end to the other end in the axial length direction (z direction) due to the arrangement of the insulating member 10. Accordingly, the first terminal electrode 6a and the second terminal electrode 6b are prevented from conducting through the gap between the bulging portions 12 by the metallicon treatment, and the short-circuit rate can be reduced.
- the insulating member 10 may be disposed in the gap of the bulging portion 12 over the entire axial length direction (z direction). Moreover, the insulating member 10 may be arrange
- gap of the bulging part 12 may open in the both ends of an axial length direction (z direction). Since the gap of the bulging portion 12 is open at the end in the axial length direction (z direction), the metallicon enters the gap of the opening of the bulging portion 12 when forming the external electrode, and an anchor effect is obtained. By this anchor effect, an effect of improving the bonding strength between the main body 5 and the first and second terminal electrodes 6a and 6b is obtained.
- FIG. 9 is a perspective view schematically showing the configuration of the coupled capacitor C.
- the coupled capacitor C of this embodiment has a configuration in which a plurality of film capacitors A are connected in parallel by a pair of bus bars 21 and 23.
- the bus bars 21 and 23 are configured by terminal portions 21a and 23a for external connection and lead terminal portions 21b and 23b, and the lead terminal portions 21b and 23b are connected to the terminal electrodes 6a and 6b of the film capacitor A, respectively.
- connection type capacitor C When the above-described film capacitor A is applied to the connection type capacitor C, the connection type capacitor C having a low short-circuit rate and high insulation can be obtained.
- the coupled capacitor C can obtain the same effect even if it has a structure in which the flat surfaces of the film capacitor B are stacked.
- the axial length direction (z direction) may be arranged along the vertical direction.
- FIG. 10 is a schematic configuration diagram for explaining the configuration of the inverter.
- FIG. 10 shows an example of an inverter D that generates alternating current from direct current.
- the inverter D of the present embodiment has a configuration including a bridge circuit 31 and a capacitor unit 33.
- the bridge circuit 31 includes a switching element (for example, an IGBT (insulated gate bipolar transistor)) and a diode, and the capacitor unit 33 is disposed between the input terminals of the bridge circuit 31 for voltage stabilization.
- the film capacitor A or the connected capacitor C is applied as the capacitor 33.
- the inverter D is connected to a booster circuit 35 that boosts the voltage of the DC power supply.
- the bridge circuit 31 is connected to a motor generator (motor M) serving as a drive source.
- FIG. 11 is a schematic configuration diagram showing an electric vehicle.
- FIG. 11 shows an example of a hybrid vehicle (HEV) as the electric vehicle E.
- HEV hybrid vehicle
- reference numeral 41 denotes a driving motor
- 43 denotes an engine
- 45 denotes a transmission
- 47 denotes an inverter
- 49 denotes a power source (battery)
- 51a and 51b denote front wheels and rear wheels.
- the electric vehicle E has outputs of the motor 41 and the engine 43 or both as a drive source, and the output is transmitted to the pair of left and right front wheels 51 a via the transmission 45.
- the power source 49 is connected to the motor 41 via the inverter 47.
- the electric vehicle E shown in FIG. 11 is provided with a vehicle ECU 53 that performs overall control of the entire electric vehicle E.
- the vehicle ECU 53 receives a drive signal corresponding to the operation of the driver or the like from the electric vehicle E such as an ignition key 55, an accelerator pedal (not shown), and a brake.
- the vehicle ECU 53 outputs an instruction signal to the engine ECU 57, the power source 49, and the inverter 47 as a load based on the drive signal.
- the engine ECU 57 controls the rotational speed of the engine 43 in response to the instruction signal and drives the electric vehicle E.
- the film capacitor A or the connection type capacitor C is short-circuited. Since the rate is low and the insulating property is high, current control of a control device such as an ECU mounted on the electric vehicle E can be made more stable.
- the inverter D of this embodiment can be applied not only to the hybrid vehicle (HEV) described above but also to various power conversion application products such as an electric vehicle (EV), a fuel cell vehicle, an electric bicycle, a generator, and a solar cell. .
- EV electric vehicle
- a fuel cell vehicle an electric bicycle
- a generator an electric bicycle
- a solar cell a solar cell
- a dielectric film having an average thickness of 2.5 ⁇ m was prepared using polyarylate (U-100, manufactured by Unitika). Polyarylate was dissolved in toluene, and the resin solution was coated on a polyethylene terephthalate (PET) substrate using a coater, and formed into a sheet. The molded resin sheet was heat treated at 130 ° C. to remove toluene and obtain a dielectric film.
- polyarylate U-100, manufactured by Unitika
- the obtained dielectric film was peeled from the substrate and slitted to a width of 140 mm, and then an Al metal film having a width of 107 mm was formed by vacuum deposition using a metal mask as an electrode film on one main surface of the dielectric film. Forming a metallized film.
- the metal film had a thickness of 70 nm and a sheet resistance of 8.0 ⁇ / ⁇ .
- the film thickness of the metal film was calculated
- a 140 mm wide metallized film was further slit to obtain a 55 mm wide metallized film having a 1.5 mm margin (exposed part of the dielectric film).
- the core element had a cross-sectional shape as shown in FIG. 3A and FIG. 6, and a 55 mm long polypropylene (PP) product was prepared. That is, the outer periphery has a circular shape and the inner periphery has an elliptical cross-sectional shape (FIG. 3A), and the outer periphery has a circular shape and has a thin thickness in the x direction and a thick thickness in the y direction. What has a shape (FIG. 6) was prepared.
- a pair of metallized films having a width of 55 mm were laminated and wound around the core element body so that the electrode films were opposed to each other through the dielectric film, and a wound body was produced.
- the pair of metallized films were wound in a state where they were shifted from each other by 0.5 mm in the width direction (z direction) and the margin portions were arranged on different sides in the width direction (z direction).
- the number of windings was 642, and a wound body having an outer diameter of 12.5 mm and a width of 55.5 mm (both average values) was obtained.
- the obtained wound body was flattened by pressing together with the core element body to obtain a film capacitor body.
- the press was performed under conditions of a temperature of 120 ° C. and a press load of 500 gf.
- samples using a core element having a uniform thickness (Sample Nos. 1 and 2) and samples obtained by extracting and flattening the core element (Sample No. 3) were also produced.
- the press direction was made into the y direction where the thickness of a core element body is thick.
- the gap (slit) at the end of the core was sealed with polyimide tape. Thereafter, an alloy of zinc and tin was sprayed on the opposing end surfaces of the film capacitor body where the electrode film was exposed to form a metallicon electrode as a terminal electrode to obtain a film capacitor.
- an outer periphery has an elliptical shape and an inner periphery has a slit along the major axis.
- the outer periphery has a rounded rectangular shape, and the inner periphery has a shape having teardrop-shaped bulges at both ends of the slit.
- a locally recessed portion was formed near the center of the portion corresponding to the long side of the outer periphery, and the outer periphery was not in an oval shape.
- the inner circumference has a shape in which two elliptical voids are arranged.
- the major axis d1 the minor axis d2, the ratio d2 / d1, the thickness t1 on the major axis, and the thickness t2 on the minor axis of the core was confirmed and shown in Table 1 (see FIG. 2B).
- the parameter P related to the shape of the cross section of the core, and the thickness t1 of the short side and the length d2 in the direction perpendicular to the long side
- the ratio (t1 / 2) was confirmed and shown in Table 2.
- P (L2 / L1) ⁇ (L0 / ( ⁇ ⁇ d2) ⁇ 1), where L1 is the length of the outer peripheral long side, L2 is the length of the outer peripheral short side, and L0 is The length of the entire outer periphery, d2, is the length (short diameter) of the core body in the direction perpendicular to the long side (see FIG. 5B).
- Dielectric breakdown voltage (BDV) is a voltage boost test in which a DC voltage is applied to a film capacitor at a voltage increase rate of 10 V per second from 0 V, immediately before the capacitance decreases by 5% or more with respect to the value of 0 V (initial value). Was obtained from the voltage value.
- the initial value of the capacitance was measured under the conditions of AC 10 V and 1 kHz before the boost test. The average initial value of the capacitance was 17.7 ⁇ F.
- the boost test when the short circuit, that is, when the leakage current value exceeds 1.0 mA, the DC voltage is once returned to 0 V, and the capacitance is measured under the conditions of AC 10 V and 1 kHz, and the value is the initial value. On the other hand, if it was 95% or more, the pressure increasing test was repeated from 0V.
- Sample No. of the first embodiment or the second embodiment. Nos. 4 to 27 had high insulation properties with a short rate of 12% or less and a breakdown voltage (BDV) of 850V or more.
- BDV breakdown voltage
- the sample No. Sample No. 5 to 7 and the parameter P relating to the cross-sectional shape of the core body in the second embodiment is in the range of 0.8 to 1.2, and t1 / d2 is in the range of 0.2 to 0.3. .
- the short rate was 6% or less and the BDV was 1050 V or more.
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Abstract
Description
本実施形態では、芯体4の横断面が、図2(a)、(b)に示すように、楕円形状の外周7と、長径に沿ったスリット9を形成する内周8とを有する。ここで、楕円形状の長軸がx方向、短軸がy方向に一致するものとし、長径の長さをd1、短径の長さをd2とする。図2(c)は芯体4の斜視図である。
本実施形態では、芯体4は、図5(a)、(b)に示すように、軸長(z方向)に垂直な断面(以下、横断面という場合もある)が、一対の直線状の長辺7aおよび一対の短辺7bを備える外周7と、外周7の内側に長辺7aに沿うスリットを形成する内周8と、を有する。ここで、長辺7aに平行な方向をx方向、長辺7aに垂直な方向をy方向とし、長辺7aの長さをL1、短辺7bの長さをL2とする(図5(b)を参照)。内周8により形成されるスリットは、長辺7aに沿うとともにx方向の両端に空隙である一対の膨らみ部12を有する。図5(c)は芯体4の斜視図である。
図9は、連結型コンデンサCの構成を模式的に示した斜視図である。図9においては構成を分かりやすくするために、ケースならびにモールド用の樹脂を省略して記載している。本実施形態の連結型コンデンサCは、複数個のフィルムコンデンサAが一対のバスバー21、23により並列接続された構成を有する。バスバー21、23は、外部接続用の端子部21a、23aと、引出端子部21b、23bにより構成され、引出端子部21b、23bは、フィルムコンデンサAの端子電極6a、6bにそれぞれ接続される。
図6に示す断面形状を有する芯素体を用いたものでは、外周が角丸長方形状で内周がスリットの両端に涙滴状の膨らみ部を有する形状となっていた。肉厚が一様な芯素体を用いたものでは、外周の長辺に相当する部位の中央付近に局所的に凹んだ部分が形成され、オーバル状をなす外周を有していなかった。また、内周も2つの楕円状の空隙が並んだような形状をなしていた。
2a、2b・・電極膜
3a、3b・・金属化フィルム
4・・・芯体
5・・・本体
6a・・・第1端子電極
6b・・・第2端子電極
7・・・芯体の外周
7a・・芯体の外周の長辺
7b・・芯体の外周の短辺
8・・・芯体の内周
9・・・スリット
10・・絶縁部材
11・・開口部
12・・膨らみ部
Claims (15)
- 絶縁材料からなる芯体に金属化フィルムを巻回してなる本体と、該本体の軸長方向の両端面にそれぞれ設けられた第1、第2端子電極とを具備するとともに、
前記芯体は、前記軸長方向に垂直な断面が、長径と短径とを有するオーバル形状の外周と、前記長径に沿ったスリットを形成する内周とを有する、フィルムコンデンサ。 - 前記芯体は、前記長径上の肉厚(t1)が、前記短径上の肉厚(t2)よりも小さい、請求項1に記載のフィルムコンデンサ。
- 前記スリットが、前記長径上の両端に一対の膨らみ部を有する、請求項1または2に記載のフィルムコンデンサ。
- 前記スリットの前記膨らみ部は、前記断面において、前記長径の前記端部側に弧を有する涙滴状をなす、請求項3に記載のフィルムコンデンサ。
- 前記軸長方向の少なくとも一部において、前記芯体の前記膨らみ部内に絶縁部材を有する、請求項3または4に記載のフィルムコンデンサ。
- 前記内周は、前記軸長方向の少なくとも一部において、前記短径方向に互いに対向する部位が当接している、請求項1~5のいずれかに記載のフィルムコンデンサ。
- 前記軸長方向における前記芯体の両端部において、前記スリットによる開口部を有する、請求項1~6のいずれかに記載のフィルムコンデンサ。
- 前記長径の長さをd1、前記短径の長さをd2としたとき、該d2の前記d1に対する比(d2/d1)が0.05~0.5である、請求項1~7のいずれかに記載のフィルムコンデンサ。
- 前記外周が、前記長径に沿う一対の直線部と、該一対の直線をつなぐ一対の弧状部とを有する、請求項1~8のいずれかに記載のフィルムコンデンサ。
- 前記断面において、前記外周の長さをL0、前記直線部の長さをL1、前記弧状部の長さをL2、前記短径の長さをd2としたとき、
式Q=(L2/L1)×(L0/(π・d2)-1)が、0.8~1.2の範囲にある、
請求項9に記載のフィルムコンデンサ。 - 前記断面において、前記芯体の前記弧状部における肉厚(t2)が、前記短径の長さ(d2)に対する比率(t2/d2)にして、0.2~0.3の範囲にある、請求項9または10に記載のフィルムコンデンサ。
- 請求項1~11のうちいずれかに記載のフィルムコンデンサを、バスバーにより複数個接続してなることを特徴とする連結型コンデンサ。
- スイッチング素子により構成されるブリッジ回路と、該ブリッジ回路に接続された容量部とを備えているインバータであって、前記容量部が請求項1~11のうちいずれかに記載のフィルムコンデンサであることを特徴とするインバータ。
- スイッチング素子により構成されるブリッジ回路と、該ブリッジ回路に接続された容量部とを備えているインバータであって、前記容量部が請求項12に記載の連結型コンデンサであることを特徴とするインバータ。
- 電源と、該電源に接続された請求項13または14に記載のインバータと、該インバータに接続されたモータと、該モータにより駆動する車輪と、を備えていることを特徴とする電動車輌。
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US15/761,890 US10490357B2 (en) | 2015-09-28 | 2016-09-21 | Film capacitor, combination type capacitor, inverter, and electric vehicle |
CN201680053374.7A CN108028143B (zh) | 2015-09-28 | 2016-09-21 | 薄膜电容器、连结型电容器、逆变器以及电动车辆 |
JP2017543180A JP6510662B2 (ja) | 2015-09-28 | 2016-09-21 | フィルムコンデンサ、連結型コンデンサ、インバータおよび電動車輌 |
EP16851296.0A EP3358586B1 (en) | 2015-09-28 | 2016-09-21 | Film capacitor, coupled-type capacitor, inverter, and electric vehicle |
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CN109266993B (zh) * | 2018-11-28 | 2023-12-15 | 铜陵市新洲电子科技有限责任公司 | 一种电容器芯喷金专用固定框 |
WO2021038962A1 (ja) * | 2019-08-30 | 2021-03-04 | 株式会社村田製作所 | フィルムコンデンサ |
EP4030450A4 (en) * | 2019-09-13 | 2023-10-11 | Kyocera Corporation | FILM CAPACITOR ELEMENT |
JP2023003947A (ja) * | 2021-06-25 | 2023-01-17 | 日本電産株式会社 | コンデンサモジュールとこれを備えたインバータ装置、モータモジュール及び車両 |
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CN115985682A (zh) * | 2023-03-22 | 2023-04-18 | 深圳江浩电子有限公司 | 一种车载电容器 |
Also Published As
Publication number | Publication date |
---|---|
CN108028143B (zh) | 2020-04-28 |
US10490357B2 (en) | 2019-11-26 |
EP3358586A4 (en) | 2019-05-29 |
US20180269002A1 (en) | 2018-09-20 |
JP6510662B2 (ja) | 2019-05-08 |
JPWO2017057122A1 (ja) | 2018-07-05 |
EP3358586A1 (en) | 2018-08-08 |
EP3358586B1 (en) | 2021-09-08 |
CN108028143A (zh) | 2018-05-11 |
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