WO2019117229A1 - 電動機 - Google Patents
電動機 Download PDFInfo
- Publication number
- WO2019117229A1 WO2019117229A1 PCT/JP2018/045796 JP2018045796W WO2019117229A1 WO 2019117229 A1 WO2019117229 A1 WO 2019117229A1 JP 2018045796 W JP2018045796 W JP 2018045796W WO 2019117229 A1 WO2019117229 A1 WO 2019117229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator
- support wall
- rotor
- end side
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
-
- 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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- 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
- H02K5/15—Mounting arrangements for bearing-shields or end plates
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
Definitions
- the present invention relates to an electric motor capable of flowing a refrigerant through a refrigerant flow path for cooling.
- the electric motor includes a rotating shaft, a rotor attached to the rotating shaft, a stator disposed on an outer periphery of the rotor, and a case for housing the rotor and the stator.
- At least one of the rotor and the stator is an electromagnet configured by winding a coil, and generates a magnetic force by energization to rotate the rotation shaft together with the rotor.
- the motor When the motor is driven, the motor generates heat from heat generated by energization of the coil, heat generated at the sliding contact portion between the rotating shaft and the bearing, and the like. Therefore, there are a plurality of techniques for cooling the motor in order to prevent the efficiency decrease and failure of the motor due to heat generation.
- the inside of the rotation shaft is hollow, and in this hollow space, a pipe having a diameter smaller than the inner diameter of the rotation shaft is disposed.
- the refrigerant is supplied to the pipe by a pump from a refrigerant tank installed outside the motor.
- the refrigerant passes through the inside of the pipe, flows from the tip of the pipe into the flow path formed between the rotating shaft and the pipe, and is returned to the refrigerant tank through the flow path.
- the inside of a rotating shaft is hollow in the electric motor shown by patent document 2, A pipe is penetrated in this hollow space, A refrigerant
- coolant is sent with a pump by the pump from the refrigerant tank installed in the exterior of an electric motor to a pipe .
- Through holes are formed in the rotating shaft at both end sides in the longitudinal direction to penetrate the hollow space and the inside of the case accommodating the rotor and the stator.
- the case is provided with a discharge path connected to the refrigerant tank. The refrigerant flows into the hollow space of the pipe, flows into the case through the through hole, and is returned to the refrigerant tank through the discharge passage.
- the inside of the rotation shaft is hollow, and in this hollow space, a pipe having a diameter smaller than the inner diameter of the rotation shaft is disposed.
- the refrigerant is supplied to the pipe by a pump from a refrigerant tank installed outside the motor.
- the refrigerant passes through the inside of the pipe, flows from the tip of the pipe into the flow path formed between the rotating shaft and the pipe, and is returned to the refrigerant tank through the flow path.
- a cooling jacket surrounding the outer periphery in the circumferential direction is attached to the case accommodating the rotor and the stator.
- a flow passage space is formed between the outer peripheral surface of the case and the cooling jacket, and the refrigerant is fed into the space from the refrigerant tank by a pump.
- the cooling jacket is provided with a discharge passage connected to the refrigerant tank. The refrigerant flows into the flow passage space, and then is returned to the refrigerant tank through the discharge passage.
- the coolant is fed into the flow path formed between the rotary shaft and the pipe to cool the sliding contact portion between the rotary shaft and the bearing, and the rotor is rotated via the rotary shaft. It is cooled.
- the cooling effect of the stator can not be expected.
- the fluid flowing into the hollow space of the rotating shaft cools the periphery of the rotating shaft, and the coolant flowing into the case cools the rotor and the stator.
- the refrigerant flowing into the case is configured to be in direct contact with the rotor and the stator, the refrigerant is agitated by the rotor and the refrigerant acts as a resistance to the rotation of the rotor.
- the inside of the rotary shaft is hollow, and the fluid flowing into the hollow space of the rotary shaft cools the rotary shaft and its periphery, and between the outer peripheral surface of the case and the cooling jacket.
- the stator is cooled by the fluid flowing into the flow passage space of
- the rotor-side refrigerant flow path circulated in the hollow space of the rotation shaft and the refrigerant tank, the flow path space between the outer peripheral surface of the case and the cooling jacket, and the stator-side refrigerant circulated in the refrigerant tank
- the refrigerant flow path becomes complicated because the flow path is separately provided.
- the present invention has been made focusing on such problems, and can easily cool the periphery of the rotation shaft, the rotor, and the stator without resistance to the rotation of the rotor while simply forming the refrigerant flow path. It aims at providing a motor.
- the electric motor of the present invention A hollow rotary shaft (2), a rotor (3) attached to the rotary shaft (2), a stator (4) disposed on the outer periphery of the rotor (3), the rotor (3) and the stator
- a motor (1) comprising: a case (5) for housing (4); and a coolant flowable in the coolant flow path for cooling;
- the refrigerant flow path is A hollow inner flow passage (2a) formed on the rotation shaft (2);
- An outer flow passage (S2) formed between the outer periphery of the stator (4) and the inner periphery of the case (5);
- the rotor and the periphery of the rotating shaft are cooled by the refrigerant passing through the inner flow passage formed in
- the rotary shaft (2) penetrates the support wall (5c) at one end of the rotor (3) and is pivotally supported by the support wall (5c) at one end. According to this, since the accommodation space can be isolated by the support wall portion that pivotally supports the rotation shaft, the communication flow path can be simplified.
- the communication channel (S1) is formed by the support wall (5c) on the one end side and a cap (17) on the one end side attached to the support wall (5c) on the one end side.
- the communication flow channel can be formed only by attaching the cap on one end side to the support wall portion on one end side.
- a seal member (28) is disposed between the stator (4) and the support wall (5c) on the one end side. According to this, a refrigerant
- a plurality of through holes (33) penetrating in the axial direction forming a part of the communication channel (S1) are formed along the circumferential direction in the support wall (5c) on the one end side There is.
- the sealing structure of the accommodation space can be simply configured, and the number of members constituting the communication channel can be reduced.
- a plurality of through holes are formed along the circumferential direction, the outer periphery of the stator can be cooled in a wide range.
- the rotary shaft (2) penetrates the support wall (5b) at the other end of the rotor (3) and is pivotally supported by the support wall (5b) at the other end.
- a seal member (27) is disposed between the stator (4) and the support wall (5b) on the other end side. According to this, since the accommodation space is isolated by the support wall part which pivotally supports the rotating shaft, the accommodation space can be simplified.
- the outer flow path (S2) is formed by the support wall (5b) at the other end and the cap (16) at the other end attached to the support wall (5b) at the other end.
- a communication passage (S3) on the other end side which communicates and opens to the outside is formed. According to this, the refrigerant flow path can be easily configured on the other end side.
- the support wall (5b) on the other end side is formed with a plurality of through holes (32) penetrating in the axial direction and communicating with the outer flow passage (S2).
- the sealing structure of the accommodation space can be simply configured.
- the inner flow passage (2a) opens at both axial ends of the rotation shaft (2). According to this, it is possible to make the rotation shaft a simple structure and to reduce the pressure loss between the inner flow passage and the communication flow passage.
- the refrigerant flows in the order of the inner flow passage (2a), the communication flow passage (S1), and the outer flow passage (S2). According to this, since the rotor can be cooled by the low temperature refrigerant, the overall cooling efficiency is excellent.
- a recess (44a) recessed to the inner diameter side is formed on the outer periphery of the stator (4). According to this, since the refrigerant enters the inner diameter side of the stator by the recess, the stator can be cooled rapidly.
- a protrusion (45e) loosely fitted in the recess (44a) of the stator is formed on the inner periphery of the case (45). According to this, since the cross section of the flow path becomes substantially constant due to the concave and the convex, the refrigerant easily flows to the inner diameter side of the stator.
- FIG. 2 is a cross-sectional view showing a stator showing a flow of a refrigerant of an electric motor in Embodiment 1. It is sectional drawing which shows the electric motor in Example 2 of this invention. It is sectional drawing which shows the electric motor in Example 3 of this invention.
- a mode for carrying out a motor according to the present invention will be described below based on an embodiment.
- the electric motor 1 has a rotary shaft 2, a rotor 3 fixed to the rotary shaft 2 and rotating with the rotary shaft 2, and an annular stator radially spaced from the outer periphery of the rotor 3. And a case 5 for housing the rotor 3 and the stator 4.
- the rotor 3 is an electromagnet configured by winding a coil
- the stator 4 is a permanent magnet. By energizing a coil constituting the rotor 3 from a power supply (not shown), a magnetic force is generated, and the rotor 3 and the rotary shaft 2 fixed to the rotor 3 rotate.
- the case 5 is formed of a metal such as iron
- the rotating shaft 2 is formed of a nonmagnetic material such as stainless steel.
- the case 5 is divided into two in the axial direction of the rotary shaft 2, and the divided case bodies 5A and 5B are welded and fixed at a welded portion 36 on the outer periphery to be in a sealed state.
- Case 5 is formed of a substantially cylindrical shape and a peripheral wall portion 5a forming an outer peripheral surface and an inner peripheral surface of case 5, and support wall portions 5b and 5c formed in a substantially disk shape and forming both side walls of case 5 It is configured.
- a through hole 8 penetrating in the axial direction is formed at the radial center of the support wall 5b on the divided case body 5A side.
- a stepped portion 9 opened to the support wall portion 5c side of the opposing divided case body 5B is formed continuously to the through hole 8.
- a bearing 10 is attached to the step 9, and the rotating shaft 2 is pivotally supported via the bearing 10.
- a seal ring 11, which is an annular seal member, is disposed at the back of the bearing 10 in the stepped portion 9, and seals between the rotation shaft 2 and the divided case body 5A.
- a through hole 12 penetrating in the axial direction is formed at the radial center of the support wall 5c on the divided case body 5B side. Further, in the support wall portion 5c on the divided case body 5B side, a stepped portion 13 opened to the support wall portion 5b side of the opposing divided case body 5A is formed continuously to the through hole 12.
- a bearing 14 is attached to the step 13, and the rotating shaft 2 is pivotally supported via the bearing 14.
- a seal ring 15, which is an annular seal member, is disposed at the back of the bearing 14 in the step portion 13, and seals between the rotation shaft 2 and the divided case body 5B.
- a substantially cup-shaped cap 16 and a substantially disc-shaped cap 17 are welded and fixed to the axially opposite end portions of the case 5 by means of a welding portion 36 on the outer periphery, and are in a sealed state.
- the caps 16 and 17 are formed of metal such as iron.
- a through hole 18 penetrating in the axial direction is formed at the center in the radial direction, and the rotation shaft 2 is inserted through the through hole 18.
- An annular groove 19 opening in the inner diameter direction is formed on the inner peripheral surface of the through hole 18.
- a seal ring 20, which is an annular seal member, is fitted in the groove 19 to seal between the rotary shaft 2 and the cap 16.
- the stator 4 is disposed between the support wall 5b on the divided case body 5A side and the support wall 5c on the divided case body 5B side.
- Annular recesses 21 and 22 are formed on the inner diameter side of the stator 4 and on the opposing surface to the support wall 5b and the support wall 5c, and the recesses 21 and 22 support the support wall 5b and the support wall Axially projecting annular projections 23 and 24 formed on 5c are engaged with each other.
- axial and radial movement of the stator 4 is restricted.
- Annular step portions 25 and 26 are respectively formed on the outer diameter side of the support wall 5b on the divided case body 5A side and the support wall 5c on the divided case body 6B side.
- Sealing rings 27 and 28, which are annular sealing members, are disposed in the step portions 25 and 26, respectively, and the divided body 6, the stator 4 and the divided body 7 are connected in a sealed state.
- a housing space R surrounding a part of the rotor 3 and the rotary shaft 2 is partitioned in a sealed state by the and the divided case body 5B.
- the rotation shaft 2 is provided with a hollow portion 2a (inner flow passage) which penetrates in the axial direction and opens at both ends.
- a refrigerant tank 30 is installed outside the motor 1, and the refrigerant in the refrigerant tank 30 is fed by the pump P into the hollow portion 2 a through the suction passage 31.
- a recessed portion 5d which is recessed in the outer diameter direction is formed.
- the inner diameter of the recess 5 d is larger than the outer diameter of the stator 4, and a space S ⁇ b> 2 constituting an outer flow passage is formed between the recess 5 d and the stator 4.
- a recess 5 e that is recessed in the axial direction is formed.
- a space S1 is formed between the cap 17 and the recess 5e formed in the support wall 5c of the case 5 to form a communication channel.
- the cap 16 is formed with a recess 16 a that is recessed in the axial direction on the surface facing the end of the case 5 in the axial direction. Between the recess 16 a of the cap 16 and the end of the case 5, a space S ⁇ b> 3 that constitutes a discharge flow path is formed.
- the cap 16 is formed with a through hole 16b communicating with the discharge passage 34, and the refrigerant in the space S3 is returned to the refrigerant tank 30 through the discharge passage 34.
- the hollow portion 2 a of the rotary shaft 2 communicates with the space S 1 formed between the cap 17 and the recess 5 e of the case 5.
- a plurality of through holes 32 penetrating in the axial direction are formed along the circumferential direction.
- a plurality of through holes 33 penetrating in the axial direction are similarly formed along the circumferential direction in the support wall 5 c of the case 5.
- the space S2 is communicated with the space S2.
- the space S1 and the space S2 are communicated with each other by the through hole 33 formed in the support wall 5c of the case 5.
- the refrigerant flow path in the motor 1 includes the hollow portion 2 a of the rotating shaft 2, the space S 1 formed between the cap 17 and the recess 5 e of the case 5, the through hole 33, and the recess of the cap 17 and the case 5
- a space S2 formed between the space 5e and the space 5e, a through hole 32, a space S3 formed between the recess 16a of the cap 16 and the end of the case 5, and a discharge path 34 are provided.
- coolant sent in from the refrigerant tank 30 to the electric motor 1 is demonstrated using FIG.1 and FIG.4.
- the refrigerant in the refrigerant tank 30 is fed by the pump P through the suction passage 31 into the hollow portion 2 a of the rotary shaft 2.
- the rotating shaft 2 is cooled by the refrigerant passing through the hollow portion 2a, and functions as a bearing of the rotating shaft 2, and the through holes 18, 8 and 12 which are in sliding contact, the seal rings 20, 11 and 15, the bearing 10, Each is cooled.
- the rotor 3 is also cooled via the rotating shaft 2. According to this, it is possible to reduce the heat rise of the rotor 3 due to the energization of the coil constituting the rotor 3, and to prevent the efficiency reduction of the motor and the breakage of the rotor 3.
- the refrigerant sent into the hollow portion 2 a moves in the axial direction in the hollow portion 2 a and moves to the space S 1 formed between the cap 17 and the recess 5 e of the case 5.
- the refrigerant moves from the space S1 to the space S2 formed between the recess 5d of the case 5 and the stator 4 through the through hole 33.
- the refrigerant fed into the space S2 moves axially and circumferentially in the space S2, and directly cools the stator 4 from the outer peripheral surface side. According to this, the stator 4 heated by the generated heat of the rotor 3 can be cooled. Also, if the stator 4 is an electromagnet constituted by a coil, it is possible to reduce the heat rise generated by the stator 4 itself.
- the refrigerant in the space S2 moves from the space S2 to the space S3 formed between the recess 16a of the cap 16 and the end of the case 5 through the through hole 32.
- the refrigerant sent into the space S3 is returned to the refrigerant tank 30 through the through hole 16b formed in the cap 16 and the discharge path 34. That is, the through hole 32, the space S3 and the through hole 16b constitute a discharge flow path.
- the rotating shaft 2 is directly cooled by the refrigerant from the outer peripheral side.
- the rotor 3 and the periphery of the rotary shaft 2 are cooled by the refrigerant passing through the hollow portion 2a (inner flow passage) formed in the rotary shaft 2, and the stator 4 has the outer periphery of the stator 4 and the case 5. It is cooled by the refrigerant flowing in the space S2 (outside flow path) formed between the inner circumference and the inner circumference. Further, the hollow portion 2a and the space S2 are communicated with each other by a space S1 (communication flow path) formed between the cap 17 and the recess 5e of the case 5 which are separated from the housing space R of the rotor 3. Therefore, the refrigerant flow path can be simply configured, and the refrigerant does not affect the rotation of the rotor 3.
- seal rings 27 and 28 are disposed between the stator 4 and the support wall portions 5b and 5c, it is possible to make it difficult for refrigerant, contamination, and the like to enter the housing space R for housing the rotor 3. The influence on the rotation of the rotor 3 can be reliably prevented.
- a plurality of through holes 33 formed in the support wall 5c form a part of a communication flow path between the space S2 and the space S1. Therefore, the member which comprises a communicating flow path can be decreased. Further, since a plurality of through holes 33 are formed along the circumferential direction, the refrigerant can be distributed and fed in the circumferential direction of the space S2, and the outer periphery of the stator 4 can be uniformly cooled.
- a plurality of through holes 32 are formed in the support wall 5b along the circumferential direction, and the refrigerant is dispersed in the circumferential direction of the space S2 and sent into the space S3. Therefore, the fluid can move to S3 without stagnating in the space S2, and can be efficiently cooled.
- the hollow portion 2a of the rotary shaft 2 is opened at both ends in the axial direction of the rotary shaft 2, the inner wall of the rotary shaft 2 does not collide with the fluid flow, and therefore, it is difficult to receive an axial load. Is hard to damage.
- the refrigerant sent from the refrigerant tank 30 to the electric motor 1 flows in the order of the hollow portion 2a of the rotary shaft 2 constituting the inner flow passage, the space S1 constituting the communication flow passage, and the space S2 constituting the outer flow passage. According to this, since the portion in sliding contact with the rotor 3 and the rotary shaft 2 having a large amount of heat generation can be cooled by the refrigerant having a low temperature, the entire cooling efficiency is excellent.
- a plurality of recessed portions 44a recessed toward the inner diameter side are formed in the axial direction on the outer periphery of the stator 44, and in the inner periphery of the case 45, convex portions 45e protruding to the inner diameter side so as to be loosely fitted in the recessed portions 44a Multiple are formed.
- the stator 44 since the refrigerant sent into the space S2 enters the inner diameter side of the stator 44 by the concave portion 44a formed in the stator 44, the stator 44 can be cooled quickly. Further, the refrigerant sent into the space S2 can be reliably guided into the recess 44a by the projection 45e formed in the case 45. Furthermore, since the cross section of the flow path is substantially constant due to the concave and convex portions, the refrigerant easily flows to the inner diameter side of the stator 44.
- stator 54 On the outer periphery of the stator 54, a plurality of guide paths 54a extending in the inner diameter side and returning to the outer diameter side on the inner diameter side of the stator 54 are formed in the axial direction. According to this, since the refrigerant sent into the space S2 gets to the inner diameter side of the stator 54 by the induction passage 54a formed in the stator 54, the stator 54 can be cooled quickly.
- the communication flow channel has been described in the example constituted by the space S1 formed between the cap 17 and the recess 5e formed between the support wall 5c of the case 5 and the through hole 32.
- the cap 17 may be formed into a substantially cup shape provided with a recess, and the recess of the support wall 5 c of the case 5 may be omitted.
- the communication channel separates the hollow space 2a of the rotary shaft 2 and the space S2 formed between the recess 5d of the case 5 and the stator 4 from the housing space R. You may comprise by the pipe etc. which connect.
- the discharge flow path has been described as an example constituted by the space S3 formed between the cap 16 and the support wall portion 5b of the case 5, the through hole 32, and the through hole 16b.
- the discharge flow path is a pipe or the like communicating the space S2 formed between the recess 5d of the case 5 and the stator 4 and the discharge path 34 in a state of being separated from the accommodation space R. It may be configured.
- space S3 which comprises a discharge flow path does not restrict the structure which a refrigerant touches directly to axis of rotation 2, for example, forms an annular partition in the outside diameter side rather than axis of rotation 2, and the refrigerant in space S3 is an axis of rotation
- a structure which does not touch 2 directly it is good also as composition which is hard to give influence to rotation drive of axis of rotation 2.
- case 5 is not limited to the division structure, and the division structure may be divided in the vertical direction.
- the space S2 is formed between the inner periphery of the case 5 and the stator 4 without increasing the size of the motor 1 by providing the recess 5d in the inner periphery of the case 5, but the invention is not limited thereto.
- the space S2 may be configured by the difference between the inner diameter of the case 5 and the outer diameter of the stator 4 without providing a recess in the inner periphery of the case 5.
- the space S1 is formed in a substantially circular shape having a predetermined depth between the cap 17 and the recess 5e formed between the support wall 5c of the case 5, but the invention is limited thereto.
- a plurality of radially extending linear grooves communicating with the hollow portion 2 a of the rotating shaft 2 may be formed in the recess 5 e and may be formed between the linear grooves and the cap 17.
- the motor has been described as an embodiment of the invention for cooling the periphery of the rotary shaft, the rotor and the stator without resistance to the rotation of the rotor, but the invention is not limited to the motor. Similar effects can be obtained by applying the above-described refrigerant flow path.
- case 5 and the caps 16 and 17 may be formed of materials other than metal.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
また、ロータ及びステータを収容するケースには、外周を周方向に囲む冷却ジャケットが取付けられている。ケースの外周面と冷却ジャケットとの間には流路空間が形成されており、該空間には冷媒槽からポンプにより冷媒が送り込まれるようになっている。冷却ジャケットには冷媒槽と接続される排出路が設けられている。冷媒は流路空間に流れ込んだ後、排出路を通って冷媒槽に返される。
中空の回転軸(2)と、前記回転軸(2)に取り付けられたロータ(3)と、前記ロータ(3)の外周に配置されるステータ(4)と、前記ロータ(3)及び前記ステータ(4)を収容するケース(5)とを備え冷媒流路に冷媒を流して冷却可能な電動機(1)であって、
前記冷媒流路は、
前記回転軸(2)に形成された中空の内側流路(2a)と、
前記ステータ(4)の外周と前記ケース(5)の内周との間に形成された外側流路(S2)と、
前記ロータ(3)が収容される前記ケース(5)内の収容空間(R)とは隔離して前記内側流路(2a)及び前記外側流路(S2)を連通する連通流路(S1)と、
により構成されていることを特徴としている。
この特徴によれば、ロータと回転軸の周辺とは回転軸に形成された内側流路を通った冷媒により冷却されるとともに、ステータはステータの外周とケースの内周との間に形成された外側流路を流れる冷媒により冷却され、さらにこれらの流路をロータの収容空間とは隔離した連通流路によって連通させることで、冷媒流路を簡易に構成できるとともに冷媒がロータの回転に影響を与えることがない。
これによれば、回転軸を軸支する支持壁部によって収容空間を隔離できるため、連通流路を簡単な構成にできる。
これによれば、一端側のキャップを一端側の支持壁部に取り付けるだけで、連通流路を形成できる。
これによれば、冷媒、コンタミ等がロータとステータとの間の収容空間に侵入しにくくすることができる。
これによれば、収容空間の密閉構造を単純に構成できるとともに、連通流路を構成する部材を少なくできる。また貫通孔が周方向に沿って複数形成されているため、ステータの外周を広い範囲で冷却できる。
前記ステータ(4)と他端側の支持壁部(5b)との間にはシール部材(27)が配置されている。
これによれば、回転軸を軸支する支持壁部によって収容空間を隔離しているため、収容空間を簡単な構成にできる。
これによれば、他端側において冷媒流路を簡単に構成できる。
これによれば、収容空間の密閉構造を単純に構成できる。
これによれば、回転軸を単純な構造とできるとともに内側流路と連通流路との間の圧力損失を小さくすることができる。
これによれば、ロータを温度の低い冷媒によって冷却できるため全体の冷却効率に優れる。
これによれば、凹部によりステータの内径側まで冷媒が入り込むのでステータを迅速に冷却できる。
これによれば、凹部と凸部により流路断面が略一定となるため、ステータの内径側まで冷媒が流れ易い。
2 回転軸
2a 中空部(内側流路)
3 ロータ
4 ステータ
5 ケース
5a 周壁部
5b 支持壁部
5c 支持壁部
6 分割体
7 分割体
8 貫通孔
11 シールリング(シール部材)
16 キャップ
16b 貫通孔(排出流路)
17 キャップ
30 冷媒槽
31 吸入路
32 貫通孔(排出流路)
33 貫通孔(連通流路)
34 排出路
44 ステータ
44a 凹部
45 ケース
45e 凸部
54 ステータ
54a 誘導路
P ポンプ
R 収容空間
S1 空間(連通流路)
S2 空間(外側流路)
S3 空間(排出流路)
Claims (12)
- 中空の回転軸と、前記回転軸に取り付けられたロータと、前記ロータの外周に配置されるステータと、前記ロータ及び前記ステータを収容するケースとを備え冷媒流路に冷媒を流して冷却可能な電動機であって、
前記冷媒流路は、
前記回転軸に形成された中空の内側流路と、
前記ステータの外周と前記ケースの内周との間に形成された外側流路と、
前記ロータが収容される前記ケース内の収容空間とは隔離して前記内側流路及び前記外側流路を連通する連通流路と、
により構成されていることを特徴とする電動機。 - 前記回転軸は前記ロータの一端側の支持壁部を貫通し該一端側の支持壁に軸支されている請求項1に記載の電動機。
- 前記連通流路は、前記一端側の支持壁部と、該一端側の支持壁部に取り付けられる一端側のキャップとにより形成されている請求項2に記載の電動機。
- 前記ステータと前記一端側の支持壁部との間にはシール部材が配置されている請求項3に記載の電動機。
- 前記一端側の支持壁部には、前記連通流路の一部をなす軸方向に貫通する複数の貫通孔が周方向に沿って形成されている請求項3または4に記載の電動機。
- 前記回転軸は前記ロータの他端側の支持壁部を貫通し該他端側の支持壁部に軸支されており、
前記ステータと他端側の支持壁部との間にはシール部材が配置されている請求項1ないし5のいずれかに記載の電動機。 - 前記他端側の支持壁部と、該他端側の支持壁部に取り付けられる他端側のキャップとにより、前記外側流路に連通しかつ外部に開口する他端側の連通路が形成されている請求項6に記載の電動機。
- 前記他端側の支持壁部には、軸方向に貫通し前記外側流路に連通する複数の貫通孔が形成されている請求項7に記載の電動機。
- 前記内側流路は前記回転軸の軸方向両端に開口する請求項1ないし8のいずれかに記載の電動機。
- 前記冷媒は前記内側流路、前記連通流路、前記外側流路の順に流れる請求項1ないし9のいずれかに記載の電動機。
- 前記ステータの外周には内径側に凹む凹部が形成されている請求項1ないし10のいずれかに記載の電動機。
- 前記ケースの内周には、前記ステータの凹部に遊嵌する凸部が形成されている請求項11に記載の電動機。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18887523.1A EP3726707B1 (en) | 2017-12-15 | 2018-12-13 | Electric motor |
| US16/770,546 US11476736B2 (en) | 2017-12-15 | 2018-12-13 | Electric motor |
| JP2019559192A JP7214653B2 (ja) | 2017-12-15 | 2018-12-13 | 電動機 |
| CN201880080229.7A CN111492565B (zh) | 2017-12-15 | 2018-12-13 | 电动马达 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017241026 | 2017-12-15 | ||
| JP2017-241026 | 2017-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019117229A1 true WO2019117229A1 (ja) | 2019-06-20 |
Family
ID=66819346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/045796 Ceased WO2019117229A1 (ja) | 2017-12-15 | 2018-12-13 | 電動機 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11476736B2 (ja) |
| EP (1) | EP3726707B1 (ja) |
| JP (1) | JP7214653B2 (ja) |
| CN (1) | CN111492565B (ja) |
| WO (1) | WO2019117229A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113497513A (zh) * | 2021-07-13 | 2021-10-12 | 智新科技股份有限公司 | 一种电机的冷却水道结构及机壳 |
| EP4097830A4 (en) * | 2020-01-28 | 2024-05-01 | Kowitz, Arthur Leon | COOLING SYSTEM FOR AN ELECTRIC MOTOR |
| US12261501B2 (en) | 2020-01-28 | 2025-03-25 | Blak Llc | System for cooling an electric motor |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022146033A (ja) * | 2021-03-22 | 2022-10-05 | いすゞ自動車株式会社 | トリラテラルサイクルシステム |
| CN115149730B (zh) * | 2021-03-31 | 2025-03-18 | 广州视源电子科技股份有限公司 | 一种滚筒电机以及跑步机 |
| FR3122050B1 (fr) * | 2021-04-15 | 2023-03-24 | Novares France | Moteur électrique agencé pour permettre une meilleure évacuation de la chaleur générée lors de son fonctionnement |
| EP4145678A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
| EP4145677A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
| CN113708549A (zh) * | 2021-09-14 | 2021-11-26 | 威海西立电子有限公司 | 一种电机冷却装置及电机 |
| CN115864711B (zh) * | 2022-07-04 | 2025-07-29 | 索恩格汽车电动系统有限公司 | 具有转子冷却结构的电机 |
| US20240175777A1 (en) * | 2022-11-25 | 2024-05-30 | Ferrari S.P.A. | Electric machine for motor vehicles, method for testing the sealing of gaskets provided in such an electric machine, and motor vehicle axle provided with such electric machine |
| FR3143909A1 (fr) * | 2022-12-20 | 2024-06-21 | Valeo Eautomotive France Sas | Machine électrique, en particulier moteur électrique |
| WO2024130347A1 (pt) * | 2022-12-21 | 2024-06-27 | Weg Equipamentos Elétricos S.a. | Carcaça de máquina elétrica girante |
| CN116409462A (zh) * | 2023-04-19 | 2023-07-11 | 成都沃飞天驭科技有限公司 | 飞行器 |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883304U (ja) * | 1972-01-18 | 1973-10-11 | ||
| JPH09163682A (ja) * | 1995-12-01 | 1997-06-20 | Nikkiso Co Ltd | 電動機のロータ冷却構造 |
| JP2000341908A (ja) * | 1999-05-31 | 2000-12-08 | Meidensha Corp | 回転電機 |
| JP2002095217A (ja) * | 2000-09-18 | 2002-03-29 | Hitachi Ltd | 車両用交流発電機 |
| JP2004159402A (ja) * | 2002-11-05 | 2004-06-03 | Toshiba Corp | 電動機及び電動発電機 |
| JP2008219960A (ja) * | 2007-02-28 | 2008-09-18 | Toyota Central R&D Labs Inc | 回転電機 |
| US7489057B2 (en) | 2007-05-01 | 2009-02-10 | Tesla Motors, Inc. | Liquid cooled rotor assembly |
| JP2010028958A (ja) * | 2008-07-17 | 2010-02-04 | Toyota Motor Corp | 回転電機及び回転電機冷却システム |
| JP2012524514A (ja) | 2009-04-20 | 2012-10-11 | ゼネラル・エレクトリック・カンパニイ | 一体式ブラシレススタータ/発電機システム |
| JP2014108009A (ja) * | 2012-11-29 | 2014-06-09 | Toyota Industries Corp | 回転電機 |
| US20160164378A1 (en) | 2014-12-04 | 2016-06-09 | Atieva, Inc. | Motor Cooling System |
| WO2016123507A1 (en) * | 2015-01-30 | 2016-08-04 | Prippel Technologies, Llc | Electric machine stator with liquid cooled teeth |
| JP2017131078A (ja) * | 2016-01-22 | 2017-07-27 | Ntn株式会社 | モータの冷却構造 |
| JP2017212860A (ja) * | 2016-05-27 | 2017-11-30 | 株式会社小松製作所 | 電動機及び減速機付電動機 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3060335A (en) * | 1961-02-07 | 1962-10-23 | Garrett Corp | Fluid cooled dynamoelectric machine |
| DE2011586A1 (de) | 1969-03-13 | 1970-10-01 | Rotax Ltd., Birmingham (Großbritannien) | Dynamoelektrische Maschine |
| DE2106057A1 (de) | 1971-02-09 | 1972-09-14 | Bosch Gmbh Robert | Wechselstromgenerator |
| JP2001218425A (ja) * | 2000-02-07 | 2001-08-10 | Thk Co Ltd | ロータ冷却機能を備えた電動モータ |
| CN101777816B (zh) | 2009-12-08 | 2012-09-05 | 精进电动科技(北京)有限公司 | 一种电机以及一种对电机进行油冷却的方法 |
| DE102011078791B4 (de) * | 2011-07-07 | 2015-04-02 | Siemens Ag | Geschlossene elektrische Maschine mit Rotorwellenbelüftung |
| JP5772544B2 (ja) * | 2011-11-25 | 2015-09-02 | トヨタ自動車株式会社 | 回転電機の冷却構造 |
| KR101453505B1 (ko) * | 2012-12-05 | 2014-10-24 | 한국생산기술연구원 | 셀프 수냉식 모터 |
| DE102013226851A1 (de) * | 2013-12-20 | 2015-06-25 | Siemens Aktiengesellschaft | Rotatorische dynamoelektrische Maschine mit einem Kühlsystem |
| CN104753296A (zh) * | 2013-12-27 | 2015-07-01 | 余增涛 | 永磁动力装置 |
| EP3072219A1 (de) * | 2014-02-17 | 2016-09-28 | Siemens Aktiengesellschaft | Elektrische maschine mit rahmen und hülle |
| DE102014117382A1 (de) * | 2014-11-27 | 2016-06-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Elektromaschine und Verfahren zum Betrieb einer Elektromaschine |
| US9762106B2 (en) * | 2014-12-04 | 2017-09-12 | Atieva, Inc. | Motor cooling system |
| DE102016001838A1 (de) * | 2016-02-17 | 2017-08-17 | Audi Ag | Elektrische Maschine für ein Kraftfahrzeug, Spulenträger für eine elektrische Maschine und Kraftfahrzeug |
-
2018
- 2018-12-13 EP EP18887523.1A patent/EP3726707B1/en active Active
- 2018-12-13 WO PCT/JP2018/045796 patent/WO2019117229A1/ja not_active Ceased
- 2018-12-13 JP JP2019559192A patent/JP7214653B2/ja active Active
- 2018-12-13 US US16/770,546 patent/US11476736B2/en active Active
- 2018-12-13 CN CN201880080229.7A patent/CN111492565B/zh active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4883304U (ja) * | 1972-01-18 | 1973-10-11 | ||
| JPH09163682A (ja) * | 1995-12-01 | 1997-06-20 | Nikkiso Co Ltd | 電動機のロータ冷却構造 |
| JP2000341908A (ja) * | 1999-05-31 | 2000-12-08 | Meidensha Corp | 回転電機 |
| JP2002095217A (ja) * | 2000-09-18 | 2002-03-29 | Hitachi Ltd | 車両用交流発電機 |
| JP2004159402A (ja) * | 2002-11-05 | 2004-06-03 | Toshiba Corp | 電動機及び電動発電機 |
| JP2008219960A (ja) * | 2007-02-28 | 2008-09-18 | Toyota Central R&D Labs Inc | 回転電機 |
| US7489057B2 (en) | 2007-05-01 | 2009-02-10 | Tesla Motors, Inc. | Liquid cooled rotor assembly |
| JP2010028958A (ja) * | 2008-07-17 | 2010-02-04 | Toyota Motor Corp | 回転電機及び回転電機冷却システム |
| JP2012524514A (ja) | 2009-04-20 | 2012-10-11 | ゼネラル・エレクトリック・カンパニイ | 一体式ブラシレススタータ/発電機システム |
| JP2014108009A (ja) * | 2012-11-29 | 2014-06-09 | Toyota Industries Corp | 回転電機 |
| US20160164378A1 (en) | 2014-12-04 | 2016-06-09 | Atieva, Inc. | Motor Cooling System |
| WO2016123507A1 (en) * | 2015-01-30 | 2016-08-04 | Prippel Technologies, Llc | Electric machine stator with liquid cooled teeth |
| JP2017131078A (ja) * | 2016-01-22 | 2017-07-27 | Ntn株式会社 | モータの冷却構造 |
| JP2017212860A (ja) * | 2016-05-27 | 2017-11-30 | 株式会社小松製作所 | 電動機及び減速機付電動機 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4097830A4 (en) * | 2020-01-28 | 2024-05-01 | Kowitz, Arthur Leon | COOLING SYSTEM FOR AN ELECTRIC MOTOR |
| US12261501B2 (en) | 2020-01-28 | 2025-03-25 | Blak Llc | System for cooling an electric motor |
| CN113497513A (zh) * | 2021-07-13 | 2021-10-12 | 智新科技股份有限公司 | 一种电机的冷却水道结构及机壳 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111492565A (zh) | 2020-08-04 |
| US20200373814A1 (en) | 2020-11-26 |
| US11476736B2 (en) | 2022-10-18 |
| EP3726707A1 (en) | 2020-10-21 |
| EP3726707A4 (en) | 2021-09-01 |
| CN111492565B (zh) | 2023-08-22 |
| JP7214653B2 (ja) | 2023-01-30 |
| JPWO2019117229A1 (ja) | 2020-12-03 |
| EP3726707B1 (en) | 2026-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019117229A1 (ja) | 電動機 | |
| US8599513B1 (en) | Bearing mechanism, motor, and disk drive apparatus | |
| US8630063B2 (en) | Bearing mechanism, motor, and disk drive apparatus | |
| US20150303774A1 (en) | Rotating electrical machine | |
| US8304946B2 (en) | Spindle motor | |
| EP2587094A1 (en) | Torque converter using magnetic viscous fluid as working fluid | |
| JP2016522372A (ja) | 内側通気を含む磁気軸受アセンブリ | |
| US20150188387A1 (en) | Motor with Thrust Bearing | |
| US20160102706A1 (en) | Fluid-Dynamic Bearing System | |
| US6955469B2 (en) | Dynamic pressure bearing device | |
| KR20160056351A (ko) | 하이브리드 차량용 구동모터의 고정자 조립유닛 | |
| JP6793178B2 (ja) | 回転電気のロータ | |
| JP6984383B2 (ja) | 回転機械 | |
| JP6151668B2 (ja) | 回転電機用ロータ | |
| JP7087677B2 (ja) | モータ | |
| JP2005257069A (ja) | 流体動圧軸受システム | |
| JP3602707B2 (ja) | 動圧軸受モータ | |
| KR102469111B1 (ko) | 베어링 장치와 이를 구비한 모터 및 팬모터 | |
| US10199065B2 (en) | Fluid bearing apparatus, motor, and disk drive apparatus | |
| JP6195167B2 (ja) | モータ | |
| KR20160081056A (ko) | 스핀들 모터 및 이를 구비하는 기록 디스크 구동장치 | |
| JPH10108407A (ja) | 動圧流体軸受装置およびこれを備えたモータ | |
| US20130259412A1 (en) | Spindle motor | |
| WO2019151100A1 (ja) | シール装置 | |
| JP2017089730A (ja) | 回転抵抗装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18887523 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2019559192 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2018887523 Country of ref document: EP Effective date: 20200715 |
|
| WWG | Wipo information: grant in national office |
Ref document number: 2018887523 Country of ref document: EP |