WO2011093200A1 - インバータ一体型駆動モジュール - Google Patents
インバータ一体型駆動モジュール Download PDFInfo
- Publication number
- WO2011093200A1 WO2011093200A1 PCT/JP2011/050941 JP2011050941W WO2011093200A1 WO 2011093200 A1 WO2011093200 A1 WO 2011093200A1 JP 2011050941 W JP2011050941 W JP 2011050941W WO 2011093200 A1 WO2011093200 A1 WO 2011093200A1
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- WO
- WIPO (PCT)
- Prior art keywords
- inverter
- rotor
- drive module
- integrated drive
- cooling air
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Definitions
- This invention relates to a drive module incorporating an inverter, and more particularly to a cooling structure such as a bearing and an inverter module.
- an AC motor that is fixed to a rotating shaft and has a cooling fan and sucks a cooling air flow from one end wall of the motor housing, is positioned on the axially outer side of the one end wall of the motor housing.
- a control device fixed to the motor housing, a cover attached to the motor housing so as to cover the control device, and a brush for flowing a field current to the rotor of the AC motor are provided (for example, refer to Patent Document 1). ).
- the conventional inverter-integrated AC motor uses an inner rotor, the amount of magnetic flux generated in the rotor cannot be increased due to the structural limitations of the rotor, and the torque per unit length cannot be increased. That is, when the outer diameter of the motor is constant, the inner rotor has a smaller surface area facing the stator than the outer rotor, and the amount of generated magnetic flux is smaller than that of the outer rotor.
- an outer rotor In order to increase the torque per unit length, it is preferable to use an outer rotor.
- the rotor diameter is larger and the rotor weight is heavier than that of the inner rotor, so that the load on the bearing that pivotally supports the rotor is increased and the amount of heat generated in the bearing is increased.
- the inverter since the inverter is built in, the flow path of the cooling air into the motor is limited, so that the bearing is not sufficiently cooled, resulting in a new problem that the life of the bearing is shortened.
- the present invention has been made to solve the above-described problems, and enables the bearing to be cooled with cooling air that has cooled the inverter module, thereby obtaining an inverter integrated drive module that can effectively cool the inverter module and the bearing. With the goal.
- An inverter-integrated drive module includes an annular stator core arranged in a circumferential direction so that a slot portion opens to the outer peripheral side, a stator having a stator coil wound around the stator core, and radial ribs on the stator core A bearing box held at the axial center position of the stator core via the rotor, a cylindrical rotor yoke portion, a bottom surface portion extending from one end of the rotor yoke portion toward the inner diameter side, and an N pole and an S pole.
- a motor composed of a rotor coaxially attached to the stator so as to be enclosed, and an axial direction of the rotor
- a fan disposed on one side so as to be able to circulate with the rotor, a flat fin base, and each of the fin bases are vertically provided on the back surface of the fin base and extend in the radial direction.
- a plurality of heat sinks having a plurality of heat dissipating fins arranged in the circumferential direction, and a plurality of heat sinks mounted on the surface of the fin base so as to be positioned on the disposition region of the heat dissipating fins and supplying AC power to the stator coil
- An inverter module including the inverter unit. Then, the motor is attached to the bracket by fixing the stator core to one surface of the flat plate-shaped mounting portion of the bracket, and the inverter module is disposed via a spacer with the radiating fin facing the other surface of the mounting portion.
- the fin base is fixed to the mounting portion and attached to the bracket.
- a first inverter side ventilation hole is drilled in a portion of the bracket facing the bearing, and a first rotor side ventilation hole is drilled in a portion of the bottom surface portion facing the bearing, Rotational drive allows the first inverter side ventilation hole and the radial outside of the heat sink to communicate with each other and is formed between adjacent heat radiating fins.
- a first cooling air ventilation path is formed which is formed inside and communicates with the first inverter side ventilation hole and the first rotor side ventilation hole and includes an axial ventilation path through which cooling air flows in the axial direction.
- the inverter unit and the bearing are cooled by the cooling air flowing in the first cooling air passage. Therefore, even in an inverter integrated drive module using an outer rotor, an excessive increase in temperature of the inverter unit and the bearing is suppressed, so that the life of the inverter unit and the bearing can be extended.
- FIG. 1 is an exploded perspective view showing an inverter-integrated drive module according to Embodiment 1 of the present invention
- FIG. 2 is a cross-sectional perspective view showing the inverter-integrated drive module according to Embodiment 1 of the present invention
- FIG. Sectional drawing which shows the rotor which comprises the motor applied to the inverter integrated drive module which concerns on Embodiment 1 of invention
- FIG. 4 shows the motor applied to the inverter integrated drive module which concerns on Embodiment 1 of this invention.
- FIG. 5 is a front view of a state in which the stator support member of the inverter-integrated drive module according to Embodiment 1 of the present invention is attached to the bracket, as viewed from one side of the bracket.
- FIG. 7 is a rear view showing a heat sink constituting the inverter module applied to the inverter integrated drive module according to the first embodiment of the present invention.
- FIG. 8 is an inverter integrated drive module according to the first embodiment of the present invention.
- FIG. 9 is a cross-sectional perspective view illustrating the flow of cooling air in the inverter-integrated drive module according to Embodiment 1 of the present invention.
- an inverter-integrated drive module 100 is an inverter module that is attached to a bracket 1 and one surface of the bracket 1 and converts DC power supplied from an external DC power source (not shown) into AC power. 7 and a motor 14 that is attached to the other surface of the bracket 1 so as to face the inverter module 7 and is driven to rotate by being supplied with AC power converted by the inverter module 7.
- the bracket 1 is manufactured by, for example, bending a steel plate into an L shape, and is used for mounting the flat mounting portion 2 that supports the inverter module 7 and the motor 14 and the inverter integrated drive module 100 to a mounting base (not shown).
- the mounting portion 2 is provided with a first inverter side ventilation hole 4 that constitutes a ventilation path for cooling the bearing 30.
- the mounting portion 2 has a second inverter side ventilation hole 5 constituting a ventilation path for cooling the stator coil 25 on the same circumference centered on the hole center of the first inverter side ventilation hole 4. Eighteen holes are drilled at a pitch.
- the 1st inverter side ventilation hole 4 is formed in the internal diameter equivalent to the stator support part 28 of the stator support member 26 mentioned later.
- the second inverter side ventilation hole 5 is formed so as to be opposed to each of a slot portion 24 defined by a stator yoke portion 22 and a tooth portion 23 adjacent to each other.
- a screw hole 43 for mounting the heat sink is formed in the mounting portion 2 as shown in FIG.
- inverter units 8 are equiangular pitch on the same circumference centering on the hole center of the through hole 10a so that it may correspond to the arrangement
- An array is implemented. Note that the radial position of the inverter unit 8 mounted on the surface of the fin base 10 substantially matches the radial position of the slot portion 24. Further, as shown in FIG. 7, the spacer 12 having the same height as the radiation fins 11 protrudes from the space on the back surface of the fin base 10 formed by thinning the group of radiation fins 11 located between the inverter units 8. Has been. Further, an insertion hole 10 b for attaching a heat sink is formed so as to penetrate the fin base 10 and the spacer 12, and an insertion hole 10 c for inserting a wiring is formed so as to penetrate the fin base 10.
- the spacer 12 is not limited to the same height as the heat radiating fins 11 and may be formed higher than the heat radiating fins 11. Further, the number of the spacers 12 is not limited to six, and it is sufficient that the heat sink 9 is stably attached to one surface of the attachment portion 2 of the bracket 1. Furthermore, all spacers 12 need not have the same shape.
- the motor 14 is produced, for example, by pressing a magnetic material such as iron into a cylindrical shape with a bottom having a cylindrical rotor yoke portion 17 and a bottom surface portion 18 extending inward from one axial end of the rotor yoke portion 17.
- the rotor 16 having the bottom surface portion 18 fixed to the shaft 15 at the axial center position of the rotor yoke portion 17, the permanent magnet 19 fixed to the inner peripheral surface of the rotor yoke portion 17 to form a magnetic pole, and a magnetic material such as iron, for example
- a stator yoke part 22 made of a laminate of steel plates and made into a cylindrical shape, and 18 pieces projecting radially outward from the outer peripheral surface of each stator yoke part 22 and arranged at equiangular pitches in the circumferential direction
- the stator core 21 having the teeth portion 23, the stator 20 having the stator coil 25 wound around the teeth portion 23, the stator 20, and the stator 20 are supported.
- a stator support member 26 for supporting the shift 15, and a centrifugal fan 31 mounted on the outer peripheral surface of the bottom portion 18 of the rotor 16.
- the permanent magnet 19 is, for example, a sintered rare earth magnet.
- a ring-shaped spacer 45 made of a nonmagnetic material such as stainless steel is fitted to the rotor yoke portion 17 so as to contact the inner peripheral surface of the bottom surface portion 18.
- the 16 permanent magnets 19 are in contact with the spacer 45 and are arranged at equiangular pitches in the circumferential direction so that N poles and S poles are alternately arranged, and are fixed to the inner peripheral surface of the rotor yoke portion 17 by adhesion or the like. Has been.
- a ring-shaped magnet holder 46 made of a nonmagnetic material such as stainless steel is press-fitted into the rotor yoke portion 17 so as to press the permanent magnet 19 toward the spacer 45, and is welded as necessary. It is fixed to. Thereby, the permanent magnet 19 is positioned in the axial direction, and the permanent magnet 19 is prevented from coming off. Further, leakage of magnetic flux from the axial end surface of the permanent magnet 19 is suppressed.
- the stator support member 26 has a cylindrical bearing box 27, a cylindrical stator support portion 28, and radial directions at an equiangular pitch from the outer peripheral surface of the bearing box 27, and an axial direction. And has six radial ribs 29 connecting the bearing box 27 and the stator support 28.
- the rotor 16 is manufactured by press-molding a magnetic material such as iron, but the bottom surface portion 18 is not necessarily made of a magnetic material. In other words, the rotor 16 only needs to have at least the rotor yoke portion 17 made of a magnetic material. Further, although the permanent magnet 19 is bonded to the inner peripheral surface of the rotor yoke portion 17, the spacer 45 and the magnet presser 46 may be omitted if the bonding strength between the permanent magnet 19 and the rotor yoke portion 17 is sufficient.
- the permanent magnet 17 is directly attached to the inner peripheral surface of the rotor yoke portion 17, but it is made of a magnetic material such as iron, and 16 permanent magnets 19 are embedded so as to be arranged at an equiangular pitch on the same circumference.
- the ring body may be sandwiched between the spacer 45 and the magnet presser 46 and press-fitted into the rotor yoke portion 17.
- stator support portion 28 is press-fitted into the stator yoke portion 22 and welded as necessary, so that the stator 20 and the stator support member 26 are integrated.
- the bearing 30 is fitted into the bearing box 27.
- the shaft 15 is press-fitted into the axial center position of the bottom surface portion 18 of the rotor 16 to which the centrifugal fan 31 is fixed, and welded as necessary, so that the rotor 16 and the shaft 15 are integrated.
- the shaft 15 is press-fitted into the bearing 30, and the rotor 16 is assembled to the stator 20 so that the rotor yoke portion 17 covers the outer periphery of the stator 20, thereby manufacturing the motor 14.
- the motor 14 is an outer rotor type three-phase motor having 16 poles and 18 slots.
- the six inverter units 8 are arranged on the surface of the fin base 10 at an equiangular pitch on the same circumference centering on the hole center of the through hole 10a so as to correspond to the region where the heat radiating fins 11 are disposed.
- the inverter module 7 is manufactured by arranging and mounting.
- the shaft center of the bearing box 27 is aligned with the hole center of the first inverter side ventilation hole 4, and the screw 40 is inserted through the mounting portion 2 to be formed on the stator support member 26.
- the motor 14 is attached to the other surface of the attachment portion 2 of the bracket 1 by being fastened to the screw hole 41.
- the circumferential position of the stator support member 26 is adjusted so that the slot portion 24 faces the second inverter side ventilation hole 5.
- the inverter module 7 is attached to one surface of the attachment portion 2 of the bracket 1 by being fastened in the hole 43.
- a part of the cooling air that has flowed inward in the radial direction from the outside of the heat sink 9 through the radiation fins 11 passes through the second inverter side ventilation hole 5 as shown by the arrow in FIG. 20, flows in the slot 24 in the axial direction, passes through the second rotor side ventilation hole 35, flows out to the outer peripheral side of the bottom surface portion 18 of the rotor 16, and radially between the bottom surface portion 18 and the base portion 32.
- a third cooling air passage that flows outward is formed.
- heat generated by the upper arm switching element and the lower arm switching element of the inverter unit 8 is transmitted to the heat radiating fins 11 through the fin base 10 and is radiated to the cooling air flowing between the heat radiating fins 11.
- a part of the heat generated by the upper arm switching element and the lower arm switching element transmitted to the heat radiating fin 11 is transmitted to the mounting portion 2 of the bracket 1 and radiated from the surface of the bracket 1.
- the heat generated in the bearing 30 is radiated to the cooling air flowing in the axial direction through the stator support portion 28.
- the heat generated in the stator coil 25 is radiated to the cooling air flowing in the axial direction in the slot portion 24.
- the heat generated in the wiring 36 is radiated to the cooling air flowing between the radiation fins 11 and the cooling air flowing through the second inverter side ventilation hole 5.
- the cooling air flows from the radially outer side of the heat sink 9 through the radiating fins 11 to the radially inner side, and then passes through the first inverter side. It flows in the axial direction from the air hole 4 through the stator support portion 28, flows out to the outer peripheral side of the bottom surface portion 18 of the rotor 16 through the first rotor side air flow hole 34, and the diameter between the bottom surface portion 18 and the base portion 32 is reduced.
- a first cooling air passage that flows outward in the direction is formed. Therefore, the inverter unit 8 and the bearing 30 are cooled by the cooling air flowing in the first cooling air passage.
- a part of the cooling air that has flowed inward in the radial direction from between the radial outside of the heat sink 9 through the radiation fins 11 flows from the second inverter side ventilation hole 5 to the stator 20 side, and passes through the slot portion 24.
- a third cooling air ventilation path that flows in the axial direction flows out to the outer peripheral side of the bottom surface portion 18 of the rotor 16 through the second rotor side ventilation hole 35, and flows radially outward between the bottom surface portion 18 and the base portion 32. Is configured. Therefore, since an excessive temperature rise of the stator coil 25 is suppressed, an increase in loss due to the temperature rise is suppressed, and the motor output characteristics are improved.
- FIG. FIG. 10 is a diagram illustrating the radial positional relationship between the stator and the inverter module in the inverter-integrated drive module according to Embodiment 2 of the present invention.
- the inverter unit 8 is mounted on the surface of the fin base 10 of the heat sink 9 so as to be positioned on the radially outer side of the second inverter side ventilation hole 5.
- Other configurations are the same as those in the first embodiment.
- the inverter unit 8 is mounted on the surface of the fin base 10 so as to be positioned on the radially outer side of the second inverter side ventilation hole 5. Therefore, since all of the cooling air flowing between the radiation fins 11 is used for cooling the inverter unit 8, the inverter unit 8 can be effectively cooled.
- the mounting portion 2A of the bracket 1A has the second inverter side ventilation hole 5 in the mounting portion 2 of the bracket 1 omitted, and has a through hole (not shown) for wiring insertion.
- the axial length of the rotor yoke portion 17A of the rotor 16A is shorter than the axial length of the rotor yoke portion 17 of the rotor 16.
- Other configurations are the same as those in the first embodiment.
- the axial length of the rotor yoke portion 17A is shortened, when the motor 14A is mounted on the other surface of the mounting portion 2A of the bracket 1A, the rotor yoke portion 17A and the mounting portion are mounted. A gap is formed between 2A.
- the cooling air flows by the rotation of the centrifugal fan 31 from the radially outer side of the heat sink 9 through the radiating fins 11 to the radially inner side, and then the first inverter side. It flows in the axial direction from the ventilation hole 4 through the stator support portion 28, flows out to the outer peripheral side of the bottom surface portion 18 of the rotor 16 ⁇ / b> A through the first rotor side ventilation hole 34, and between the bottom surface portion 18 and the base portion 32. A first cooling air passage that flows radially outward is formed. Further, as indicated by arrows in FIG.
- the axial length of the rotor yoke portion 17A is shortened. Therefore, when the motor 14A is attached to the other surface of the attachment portion 2 of the bracket 1, the rotor yoke portion 17A and the attachment portion are mounted. A gap is formed between the two.
- the cooling air flows by the rotation of the centrifugal fan 31 from the radially outer side of the heat sink 9 through the radiating fins 11 to the radially inner side, and then the first inverter side. It flows in the axial direction from the ventilation hole 4 through the stator support portion 28, flows out to the outer peripheral side of the bottom surface portion 18 of the rotor 16 ⁇ / b> A through the first rotor side ventilation hole 34, and between the bottom surface portion 18 and the base portion 32. A first cooling air passage that flows radially outward is formed. Further, as indicated by an arrow in FIG.
- the wiring 36 passes through the insertion hole 10c in the axial direction. And is pulled out to the motor 14 side without passing between the radiating fins 11. Therefore, since the cooling air flows between the radiating fins 11 without being obstructed by the wiring 36, the amount of cooling air used for cooling the inverter unit 8 and the bearing 30 increases, and the inverter unit 8 and the bearing 30 are effective. Can be cooled.
- FIG. FIG. 15 is a principal rear view showing a heat sink applied to an inverter-integrated drive module according to Embodiment 7 of the present invention.
- FIG. 16 is a principal rear view showing a heat sink applied to an inverter-integrated drive module according to Embodiment 8 of the present invention.
- the heat sink 9 ⁇ / b> D is bent so that the removed end portion on the radially outer side of the radiating fin 11 from which the predetermined region in the radial direction is removed is directed toward the insertion hole 10 c.
- Other configurations are the same as those in the seventh embodiment.
- the cooling air is radiated from the radiating fin. 11 flows inward in the radial direction, and flows into the fin removal space 37 from the removal end of the radiating fin 11 toward the insertion hole 10c. Therefore, the cooling air used for cooling the wiring 36 is further increased, and the wiring 36 can be cooled more effectively.
- FIG. 17 is a main part rear view showing a heat sink applied to an inverter-integrated drive module according to Embodiment 9 of the present invention.
- the insulating sheath 38 of the wiring 36 is formed in an elliptical cross section.
- the heat sink 9E has an elliptical shape in which the cross-sectional shape of the insertion hole 10c matches the cross-sectional shape of the insulating sheath 38.
- the insulating sheath 38 of the wiring 36 inserted through the insertion hole 10c is disposed in the fin removal space 37 with the major axis having an elliptical cross section directed in the radial direction.
- Other configurations are the same as those in the seventh embodiment.
- the fin removal space of the radiation fin 11 is arranged.
- the cooling air flowing through 37 is rectified by the insulating sheath 38. Therefore, the pressure loss due to the wiring 36 in the fin removal space 37 can be reduced, and the amount of cooling air flowing between the radiating fins 11 is ensured. Therefore, the inverter unit 8 and the bearing caused by inserting the wiring 36 are used. A decrease in the ability to cool 30 can be suppressed.
- the insulating sheath 38 is formed in an elliptical cross section.
- the sectional shape of the insulating sheath is not limited to an elliptical shape, and the front end side and the rear end of the long axis. It is sufficient that the side has an elongated shape with a curve that gradually narrows the width in the end axis direction toward the front end and the rear end in the long axis direction.
- a plurality of rectangular plate-like thin plate-like fins 47 are erected at right angles to both circumferential side surfaces of each radial rib 29 and extend in the axial direction.
- Other configurations are the same as those in the first embodiment.
- the stator support member 26B configured in this manner is formed such that strip-shaped thin fins 48 having a circular arc cross section are connected between the radial ribs 29 adjacent in the circumferential direction, and the heat dissipation area is increased. Therefore, the heat generated in the stator coil 25 and the heat generated in the bearing 30 are transmitted to the stator support member 26A and radiated from the thin plate fins 48 to the cooling air flowing in the stator support member 26B. Therefore, also in the twelfth embodiment, excessive temperature rise of the stator coil 25 and the bearing 30 is suppressed, and the motor output characteristics are improved and the life of the bearing 30 is extended.
- the centrifugal fan 31 is used.
- the fan is not limited to the centrifugal fan 31 and is opposed to the outer peripheral surface of the bottom surface portion 18 of the rotors 16 and 16A.
- the cooling air can be discharged from the stator support portions 26, 26A, 26B and the slot portion 24.
- an axial fan may be used.
- FIG. FIG. 21 is a sectional perspective view showing an inverter-integrated drive module according to Embodiment 13 of the present invention.
- the axial fan 50 is disposed so as to be fixed to the extending portion of the shaft 15 from the bottom surface portion 18 of the rotor 16 and to face the outer peripheral surface of the bottom surface portion 18.
- the axial fan 50 is rotationally driven together with the shaft 15 so as to send cooling air from the first rotor side ventilation hole 34 into the stator support portion 38 and from the second rotor side ventilation hole 35 to the slot portion 24. It is configured.
- the thirteenth embodiment is configured in the same manner as the first embodiment except that an axial fan 50 is used instead of the centrifugal fan 31.
- the cooling air is caused to enter the stator support portion 38 from the first rotor-side ventilation hole 34 as indicated by an arrow in FIG. Then, the air flows through the stator support portion 38 in the axial direction, then flows from the first inverter side ventilation hole 4 to the inner diameter side of the heat radiation fin 11, and flows between the heat radiation fins 11 from the inner diameter side to the outer radial direction.
- a first cooling air passage that flows outward in the radial direction is formed.
- the cooling air is used for cooling the bearing 30 and the stator coil 25 before being used for cooling the inverter unit 8
- the bearing 30 and the stator coil are used. 25 is effectively cooled. Therefore, when an inverter unit manufactured using a high heat-resistant semiconductor element such as SiC is used, the heat resistance temperature of the bearing 30 and the stator coil 25 is lower than that of the inverter unit. It is effective.
- FIG. FIG. 22 is a cross-sectional perspective view showing an inverter-integrated drive module according to Embodiment 14 of the present invention.
- the axial fan 50 is disposed so as to be fixed to the extending portion from the bottom surface portion 18 of the rotor 16 of the shaft 15 and to face the outer peripheral surface of the bottom surface portion 18.
- the fourteenth embodiment is configured in the same manner as the third embodiment except that an axial fan 50 is used instead of the centrifugal fan 31.
- the cooling air flows from the first rotor side ventilation hole 34 into the stator support portion 38 as indicated by arrows in FIG. Then, the air flows through the stator support portion 38 in the axial direction, then flows from the first inverter side ventilation hole 4 to the inner diameter side of the heat radiation fin 11, and flows between the heat radiation fins 11 from the inner diameter side to the outer radial direction.
- a first cooling air passage that flows outward in the radial direction is formed.
- the cooling air is used for cooling the bearing 30 before being used for cooling the inverter unit 8, so that the bearing 30 is effectively cooled. . Therefore, when an inverter unit manufactured using a high heat-resistant semiconductor element such as SiC is used, the heat-resistant temperature of the bearing 30 is lower than that of the inverter unit, so that this configuration is effective. .
- the axial fan 50 is used instead of the centrifugal fan 31 in the first and third embodiments.
- the axial fan 50 is used instead of the centrifugal fan 31.
- the flow fan 50 may be used.
- the axial fan 50 when the axial fan 50 is used in place of the centrifugal fan 31, the end of the radiating fin 11 located on the inner diameter side of the fin removing region 37 is inserted into the insertion hole 10c. It is preferable from the viewpoint of the cooling property of the wiring 36 to bend toward the front.
- the axial fan 50 is used.
- the wiring is passed through the second inverter side ventilation hole formed in the mounting portion of the bracket in order to flow the cooling air through the slot portion.
- a dedicated hole for inserting the wiring may be newly formed in the mounting portion of the bracket.
- the inverter unit is composed of one upper arm switching element and one lower arm switching element.
- the inverter unit includes a plurality of inverter units connected in parallel. You may comprise from the several lower arm switching element connected in parallel with the upper arm switching element.
- the second inverter side ventilation hole is formed in the mounting portion so as to be opposed to the slot portion in the axial direction. It is not necessary to provide all the slot portions so as to be opposed to each other in the axial direction, and the number of the second inverter side ventilation holes may be appropriately set in consideration of the temperature rise of the stator coil.
Abstract
Description
図1はこの発明の実施の形態1に係るインバータ一体型駆動モジュールを示す分解斜視図、図2はこの発明の実施の形態1に係るインバータ一体型駆動モジュールを示す断面斜視図、図3はこの発明の実施の形態1に係るインバータ一体型駆動モジュールに適用されるモータを構成するロータを示す断面図、図4はこの発明の実施の形態1に係るインバータ一体型駆動モジュールに適用されるモータを構成するステータ支持部材を示す斜視図、図5はこの発明の実施の形態1に係るインバータ一体型駆動モジュールのステータ支持部材をブラケットに取り付けた状態をブラケットの一面側から見た正面図、図6はこの発明の実施の形態1に係るインバータ一体型駆動モジュールにおけるステータとブラケットとの径方向の位置関係を説明する図、図7はこの発明の実施の形態1に係るインバータ一体型駆動モジュールに適用されるインバータモジュールを構成するヒートシンクを示す背面図、図8はこの発明の実施の形態1に係るインバータ一体型駆動モジュールにおけるインバータユニットとステータコイルとの間の電気的な接続方法を説明する要部断面図、図9はこの発明の実施の形態1に係るインバータ一体型駆動モジュールにおける冷却風の流れを説明する断面斜視図である。
また、永久磁石19をロータヨーク部17の内周面に接着しているが、永久磁石19とロータヨーク部17との接合強度が十分ならば、スペーサ45および磁石押さえ46を省略してもよい。
また、永久磁石17をロータヨーク部17の内周面に直接取り付けているが、鉄などの磁性材料で作製され、16個の永久磁石19を同一円周上に等角ピッチに配列するように埋め込んだリング体を、スペーサ45と磁石押さえ46とに挟持されてロータヨーク部17内に圧入してもよい。
ついで、6個のインバータユニット8を、フィンベース10の表面上に、放熱フィン11の配設領域に対応するように、貫通穴10aの穴中心を中心とする同一円周上に等角ピッチに配列して実装し、インバータモジュール7を作製する。
さらに、フィンベース10の貫通穴10aの穴中心を第1インバータ側通風穴4の穴中心に一致させて、ねじ42を挿通穴10bに通してブラケット1の取付部2の一面に形成されたねじ穴43に締着して、インバータモジュール7をブラケット1の取付部2の一面に取り付ける。
そこで、アウターロータを用いたインバータ一体型駆動モジュール100においても、インバータユニット8および軸受30の過度の温度上昇が抑制されるので、インバータユニット8および軸受30の長寿命化が図られる。
第2ロータ側通風穴35が、底面部18のスロット部24と同等の径方向位置に穿設されているので、スロット部24内を軸方向に流れてきた冷却風が速やかに第2ロータ側通風穴35から排出される。そこで、第3冷却風通風路の通風抵抗の増大が抑えられ、第3冷却風通風路内を流通する冷却風の流量が確保される。
放射状リブ29が、軸方向に延在する板状に作製されているので、放射状リブ29が放熱フィンとして作用し、ステータ20および軸受30が効果的に冷却される。
図10はこの発明の実施の形態2に係るインバータ一体型駆動モジュールにおけるステータとインバータモジュールとの径方向の位置関係を説明する図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
この実施の形態2によれば、インバータユニット8が、第2インバータ側通風穴5の径方向外側に位置するように、フィンベース10の表面上に実装されている。そこで、放熱フィン11間を流通する冷却風の全てがインバータユニット8の冷却に供されるので、インバータユニット8を効果的に冷却することができる。
図11はこの発明の実施の形態3に係るインバータ一体型駆動モジュールにおける冷却風の流れを説明する断面斜視図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
また、第2インバータ側通風穴5を取付部2Aに形成する必要がないので、ブラケット1Aの加工が容易となる。
図12はこの発明の実施の形態4に係るインバータ一体型駆動モジュールにおける冷却風の流れを説明する断面斜視図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
図13はこの発明の実施の形態5に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
図14はこの発明の実施の形態6に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
図15はこの発明の実施の形態7に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
図16はこの発明の実施の形態8に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は、上記実施の形態7と同様に構成されている。
図17はこの発明の実施の形態9に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は上記実施の形態7と同様に構成されている。
図18はこの発明の実施の形態10に係るインバータ一体型駆動モジュールに適用されるヒートシンクを示す要部背面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
図19はこの発明の実施の形態11に係るインバータ一体型駆動モジュールに適用されるモータを構成するステータ支持部材を示す正面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
したがって、この実施の形態11によれば、ステータコイル25や軸受30の過度の温度上昇が抑えられ、モータ出力特性の向上および軸受30の長寿命化が図られる。
図20はこの発明の実施の形態12に係るインバータ一体型駆動モジュールに適用されるモータを構成するステータ支持部材を示す正面図である。
なお、他の構成は、上記実施の形態1と同様に構成されている。
したがって、この実施の形態12においても、ステータコイル25や軸受30の過度の温度上昇が抑えられ、モータ出力特性の向上および軸受30の長寿命化が図られる。
図21はこの発明の実施の形態13に係るインバータ一体型駆動モジュールを示す断面斜視図である。
なお、実施の形態13は、遠心ファン31に代えて軸流ファン50を用いている点を除いて、上記実施の形態1と同様に構成されている。
図22はこの発明の実施の形態14に係るインバータ一体型駆動モジュールを示す断面斜視図である。
なお、実施の形態14は、遠心ファン31に代えて軸流ファン50を用いている点を除いて、上記実施の形態3と同様に構成されている。
また、上記実施の形態8において、遠心ファン31に代えて軸流ファン50を用いる場合には、フィン除去領域37の内径側に位置する放熱フィン11の除去領域側の端部を、挿通穴10cに向かうように曲げることが、配線36の冷却性の観点から好ましい。
また、実施の形態13,14では、軸流ファン50を用いるものとしているが、ファンは、軸流ファン50に限定されるものではなく、ロータ16,16Aの底面部18の外周面に相対して配設されて冷却風をステータ支持部26,26A,26B内やスロット部24内に流入させるように動作するものであればよく、例えば斜流ファンでもよい。
また、上記各実施の形態では、ステータ支持部材は6枚の放射状リブを有しているものとしているが、放射状リブの枚数を増やしてもよい。これにより、放射状リブの放熱面積が増大し、ステータコイルおよび軸受での発熱がステータ支持部内を流通する冷却風に放熱され、ステータおよび軸受の温度上昇が抑えられる。この場合、各放射状リブの断面積を小さくすれば、放射状リブの枚数を増やすことに起因するステータ支持部内の通風抵抗の増大を抑えることができる。
また、上記各実施の形態では、インバータユニットが1個の上アームスイッチング素子と1個の下アームスイッチング素子とから構成されているものとしているが、インバータユニットは、並列に接続された複数個の上アームスイッチング素子と並列に接続された複数個の下アームスイッチング素子とから構成されてもよい。
また、上記各実施の形態では、スペーサがヒートシンクのフィンベースに一体に形成されているものとしているが、スペーサはフィンベースと別部品として作製されてもよい。
Claims (12)
- スロット部が外周側に開口するように周方向に配列された円環状のステータコア、および該ステータコアに巻装されたステータコイルを有するステータ、上記ステータコアに放射状リブを介して該ステータコアの軸心位置に保持されるベアリングボックス、および円筒状のロータヨーク部、該ロータヨーク部の一端から内径側に延設された底面部、およびN極とS極とが該ロータヨーク部の内周面に周方向に交互に配列されてなる複数の磁極を有し、該底面部が上記ベアリングボックスに収納された軸受に支持されたシャフトに固着されて、該ロータヨーク部が上記ステータコアを内包するように上記ステータに同軸に取り付けられたロータから構成されるモータと、
上記ロータの軸方向一側に上記底面部に相対して該ロータと供回り可能に配設されたファンと、
平板状のフィンベース、およびそれぞれ該フィンベースの裏面に垂直に立設されて径方向に延在して、周方向に配列された複数の放熱フィンを有するヒートシンク、およびそれぞれ該フィンベースの表面に該放熱フィンの配設領域上に位置するように実装され、上記ステータコイルに交流電力を供給する複数のインバータユニットから構成されるインバータモジュールと、を備えたインバータ一体型駆動モジュールにおいて、
上記モータが、上記ステータコアをブラケットの平板状の取付部の一面に固着して該ブラケットに取り付けられ、
上記インバータモジュールが、上記放熱フィンを上記取付部の他面に向けてスペーサを介して上記フィンベースを該取付部に固着して上記ブラケットに取り付けられ、
第1インバータ側通風穴が、上記軸受と相対する上記ブラケットの部位に穿設され、
第1ロータ側通風穴が、上記軸受と相対する上記底面部の部位に穿設され、
上記ファンの回転駆動により、隣り合う上記放熱フィン間に形成されて上記第1インバータ側通風穴と上記ヒートシンクの径方向外方とを連通し、冷却風が径方向に流れる径方向通風路、および上記ステータコアの内部に形成されて上記第1インバータ側通風穴と上記第1ロータ側通風穴とを連通し、冷却風が軸方向に流れる軸方向通風路からなる第1冷却風通風路が構成されることを特徴とするインバータ一体型駆動モジュール。 - 第2ロータ側通風穴が、上記ステータコアと相対する上記底面部の部位に穿設され、
上記ファンの回転駆動により、上記スロット部の内部に形成されて上記ロータヨーク部と上記取付部との間の空隙と協働して上記ロータヨーク部の径方向外方と上記第2ロータ側通風穴とを連通し、冷却風が軸方向に流れる第2冷却風通風路が構成されることを特徴とする請求項1記載のインバータ一体型駆動モジュール。 - 第2インバータ側通風穴が、上記ステータコアと相対する上記取付部の部位に穿設され、
第2ロータ側通風穴が、上記ステータコアと相対する上記底面部の部位に穿設され、
上記ファンの回転駆動により、上記スロット部の内部に形成されて上記第2インバータ側通風穴と協働して上記径方向通風路と上記第2ロータ側通風穴とを連通し、冷却風が軸方向に流れる第3冷却風通風路が構成されることを特徴とする請求項1又は請求項2記載のインバータ一体型駆動モジュール。 - 上記第2インバータ側通風穴が上記スロット部に軸方向に相対するように上記取付部に穿設されていることを特徴とする請求項3記載のインバータ一体型駆動モジュール。
- 上記第2インバータ側通風穴が上記スロット部のそれぞれに軸方向に相対するように上記取付部に穿設されていることを特徴とする請求項4記載のインバータ一体型駆動モジュール。
- 薄板状フィンが軸方向に延在するように上記放射状リブに複数形成されていることを特徴とする請求項1乃至請求項5のいずれか1項に記載のインバータ一体型駆動モジュール。
- 上記インバータユニットと上記ステータコイルとを結線する配線が上記フィンベースおよび上記取付部を貫通していることを特徴とする請求項1乃至請求項6のいずれか1項に記載のインバータ一体型駆動モジュール。
- 上記配線が周方向に隣り合う複数本の上記放熱フィンの径方向の一部を除去して構成されたフィン除去スペース内を通るように上記フィンベースを貫通していることを特徴とする請求項7記載のインバータ一体型駆動モジュール。
- 上記フィン除去スペースの外径側又は内径側に位置する上記放熱フィンの端部が、上記放熱フィン間から上記フィン除去スペース内に流入する冷却風が上記フィン除去スペース内を通る上記配線に向うように曲げられていることを特徴とする請求項8記載のインバータ一体型駆動モジュール。
- 上記配線の絶縁シースの断面形状が、長軸方向を径方向とし、長軸の先端側および後端側を、短軸方向の幅を長軸の先端および後端に向って漸次狭くする曲線とする細長形状であることを特徴とする請求項8記載のインバータ一体型駆動モジュール。
- 上記配線が上記スペーサを挿通するように上記フィンベースを貫通していることを特徴とする請求項7記載のインバータ一体型駆動モジュール。
- 上記インバータユニットが、径方向関し、上記第2インバータ側通風穴より径方向外側に位置するように上記フィンベースの表面に実装されていることを特徴とする請求項3乃至請求項6のいずれか1項に記載のインバータ一体型駆動モジュール。
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Also Published As
Publication number | Publication date |
---|---|
JP5312614B2 (ja) | 2013-10-09 |
DE112011100372T5 (de) | 2012-12-27 |
US8866353B2 (en) | 2014-10-21 |
US20120299407A1 (en) | 2012-11-29 |
JPWO2011093200A1 (ja) | 2013-06-06 |
CN102725943B (zh) | 2014-03-12 |
CN102725943A (zh) | 2012-10-10 |
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