WO2022201173A1 - Machine électrique - Google Patents

Machine électrique Download PDF

Info

Publication number
WO2022201173A1
WO2022201173A1 PCT/IN2021/051171 IN2021051171W WO2022201173A1 WO 2022201173 A1 WO2022201173 A1 WO 2022201173A1 IN 2021051171 W IN2021051171 W IN 2021051171W WO 2022201173 A1 WO2022201173 A1 WO 2022201173A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical machine
shaft
wires
stator
wire routing
Prior art date
Application number
PCT/IN2021/051171
Other languages
English (en)
Inventor
Dhinagar Samraj Jabez
Aravindh Balaji VS
Subbiah Senthilnathan
Original Assignee
Tvs Motor Company Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tvs Motor Company Limited filed Critical Tvs Motor Company Limited
Publication of WO2022201173A1 publication Critical patent/WO2022201173A1/fr

Links

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
    • H02K1/27—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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric

Definitions

  • the present subject matter relates generally to an electrical machine of a vehicle. More particularly but not exclusively, the present subject matter relates to a wiring routing of the electrical machine of the vehicle.
  • a hub motor is an electrical machine that is incorporated in a hub of a wheel.
  • the hub motor drives the wheel directly and has various advantages such as space saving on the vehicle body. Therefore, it is widely used in modem vehicles.
  • the hub motor like a regular electrical machine includes a rotor, a stator, and a shaft.
  • the rotating part of the hub motor i.e. the rotor is at the outer side while the stator is disposed at the inner side encompassed in the rotor.
  • the shaft serves as an axle that is non-rotatably attached to a vehicle frame assembly at both ends.
  • the stator is attached to the shaft, and the rotor is fixedly disposed of in the wheel. Hence, both the shaft and the stator stay static and non-rotational.
  • the stator comprises multiple teeth surrounded by metal windings, which get energized by electricity at each phase. Therefore, a rotational force is applied to the rotor having permanent magnets by a magnetic field generated by the energized stator windings. Thereafter, the rotation of the rotor is transmitted to drive the wheels of the vehicle.
  • the stator windings get energized by an external electric source connected to the stator through a set of wires.
  • Figure 1 exemplarily illustrates a general assembly of an electrical machine in accordance with one or more implementation.
  • Figure 2 exemplarily illustrates an exploded view of the electrical machine in accordance with one or more implementation
  • Figure 3 (a) exemplarily illustrates a sub-assembly of an essential part of the electrical machine in accordance with one or more implementation
  • Figure 3 (b) exemplarily illustrates a top view of a subpart of the electrical machine in accordance with one or more implementation
  • Figure 4 exemplarily illustrates a section view of the electrical machine in accordance with one or more implementation
  • An electrical machine of a vehicle includes a rotor, a stator, and a shaft.
  • a hub motor is a kind of electrical machine, which is incorporated into the hub of a wheel. While in operation the rotor of the hub motor rotates at the outer side whereas the stator attached to the shaft remains static and non-rotational at an inner side.
  • a set of wires from a plurality of winding of the stator connects the stator to an external power source. To energize the plurality of windings of the stator, electrical current is supplied to the stator windings through the set of wires. Since the set of wires connected to the hub motor are high voltage wires, hence it is important to keep the set of wires out of interference from any physical objects in its vicinity.
  • the set of wires from the stator are passed through a cavity or an opening made in the shaft.
  • the shaft with a cavity for passing the set of wires demands special sophisticated manufacturing and automated assembly thereby increasing the overall manufacturing cost and assembly time of the hub motor.
  • a shaft with a cavity weakens the physical strength of the shaft thereby weakening the strength of the hub motor.
  • such an arrangement of wires projecting out of the shaft cavity eventually increases the overall diameter of the shaft with wires.
  • the increased diameter of the shaft with wires leads to undesirable increase in an inner diameter of a bearing of the end cover which makes it difficult to remove the end cover for servicing.
  • the electrical machine comprises a rotor, a stator, and a shaft.
  • the rotor of the electrical machine has a plurality of magnets disposed at the inner circumference.
  • the stator comprises a plurality of teeth and one or more winding made of metals around said teeth.
  • the shaft of the electrical machine being attached to the stator is a static and non-rotational member like the stator.
  • the electrical machine is configured with a wire routing member attached to the shaft such that the wire routing member aids in routing the set of wires from the stator to the controller.
  • the wiring routing member comprises one or more opening capable of routing the set of wires from the stator.
  • said one or more openings provided on the wire routing member are placed at a predetermined distance in an annular manner about the shaft axis. Therefore, the one or more openings in the wire routing member can be placed at an equidistant, attached, or non-equidistant distance from each other as per requirement.
  • the one or more opening of the wire routing member have enough clearance between the wires and an inner periphery of said opening.
  • a sealant in between the wires and the inner periphery of the one or more opening is disposed of for preventing the set of wires from being exposed to water droplets and also eliminating any entry of foreign contamination like mud, water from entering into the inside region of the electrical machine.
  • the wire routing member is press-fitted on the shaft, thereby providing a simple and easy assembly for routing wires.
  • a first inner bearing of a first end cover of the electrical machine at least partially and circumferentially overlaps with the wire routing member disposed on the shaft.
  • the overlap of the first inner bearing on the wire routing member is configured such that the outer diameter of the shaft member including outer diameter of the wire routing member is substantially equal to or less than the inner diameter of the first inner bearing.
  • the first inner bearing of the first end cover of the electrical machine is larger than the size of the second inner bearing of the second end cover of the electrical machine.
  • the present invention provides an electrical machine that efficiently and safely achieves the objective of routing wires in a simple, cost-effective manner without compromising on the strength of the electrical machine. Additionally, the present invention provides tailoring flexibility by adjusting the number of opening, size of opening and distance between said openings in the wire routing member as per requirement. The present invention also provides enough space for the disposition of the sealant in between the wires and the openings thereby preventing the set of wires from water droplets and other problems cited above.
  • Fig.l and Fig.2 exemplarily illustrates a general assembly perspective view and an exploded perspective view of a hub motor hereinafter referred to as an electrical machine (100), comprising a first end cover (101), a second end cover (102), a shaft (103), and a set of wire (104).
  • the electrical machine (100) includes a rotor (202) encompassing a stator (201) which is coupled to the shaft (103).
  • the rotor (202) rotates while the stator (201) is static and non-rotational along with the shaft (103).
  • the rotor (202) comprises a plurality of magnets (202A) disposed circumferentially along an inner circumference of the rotor (202).
  • the stator (201) comprises a plurality of teeth (201 A) surrounded by one or more windings (not labelled).
  • the teeth (201 A) along with the stator gets assembled on the shaft (103).
  • a set of wire (104) connects the stator (201) to a controller (not shown) to energize the one or more windings of the stator (201) at each phase. Since the first end cover (101) and the second end cover (102) both are moving parts rotating along with the rotor (202), it is impossible to take out the set of wires (104) from the end covers. Therefore, the only possible way of taking out the set of wires (104) from the motor is either through the shaft (103) or through near to the shaft (103).
  • Fig.3 (a) and Fig.3 (b) exemplarily illustrate sub-assembly and subpart of the electrical machine.
  • the shaft (103) ofthe electrical machine (100) is configured with a wire routing member (301) assembled on it for routing the set of wires (104) from the stator (201).
  • the wire routing member (301) is press-fitted on the shaft (103).
  • the wire routing member (301) comprises one or more openings (301A) which aids in routing and supporting the set of wires (104).
  • the wire routing member (301) can comprise of four openings for holding three phase wires and one sensor wire. Therefore, tailoring of said wire routing member (301) can be done as per requirement.
  • the space between the one or more openings (301A) is predetermined. Space can be equidistant, non-equidistant, or attached on a case-to-case basis.
  • the one or more openings (301) are large enough to accommodate a sealant (not shown) between the set of wires (104) and an inner periphery (301AA) of the one or more openings (301A). The sealant prevents the one or more set of wires (104) from water droplets, entry of external contamination etc.
  • Fig.4 exemplarily illustrates a section view of the electrical machine (100) in accordance with one or more implementation.
  • the first end cover (101) and the second end cover (102) includes a first inner bearing (401 A) and a second inner bearing (40 IB) respectively.
  • the first inner bearing (401 A) is configured to at least partially and circumferentially overlap with the wire routing member (301) in an axis direction of the shaft.
  • the first inner bearing (401 A) has a bigger outer diameter Dio than the outer diameter D2o of the second inner bearing (40 IB) i.e. Dio > D2o.
  • a co-axial and static wire routing member (301) is configured on the inner diameter of the first bearing (401A) which enables transfer of the loads from the first bearing (401 A) onto the shaft (103) while also enabling rotary motion of the first end cover (101)
  • the circumferential overlapping design of the first inner bearing (401 A) on the wire routing member (301) ensures that the outer diameter D4o of the shaft along with the outer diameter
  • Wire routing member 301 A One or more holes 301AA: Inner periphery 401 A: First inner bearing 40 IB: Second inner bearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention divulgue une machine électrique (100) dotée d'un élément de cheminement de fils (301) ayant un ou plusieurs trous (301A) permettant de faire cheminer un ensemble de fils (104) à partir du stator (201). La présente invention permet d'atteindre l'objectif de cheminement de l'ensemble de fils (104) à partir du stator (201) sans compromettre la résistance de la machine électrique (100).
PCT/IN2021/051171 2021-03-23 2021-12-14 Machine électrique WO2022201173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202141012347 2021-03-23
IN202141012347 2021-03-23

Publications (1)

Publication Number Publication Date
WO2022201173A1 true WO2022201173A1 (fr) 2022-09-29

Family

ID=83396408

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2021/051171 WO2022201173A1 (fr) 2021-03-23 2021-12-14 Machine électrique

Country Status (1)

Country Link
WO (1) WO2022201173A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201302544A (zh) * 2011-03-29 2013-01-16 Honda Motor Co Ltd 電動車輛用的電動機軸的配線結構
WO2018180422A1 (fr) * 2017-03-31 2018-10-04 Ntn株式会社 Structure de routage de fil électrique pour moteur dans roue

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201302544A (zh) * 2011-03-29 2013-01-16 Honda Motor Co Ltd 電動車輛用的電動機軸的配線結構
WO2018180422A1 (fr) * 2017-03-31 2018-10-04 Ntn株式会社 Structure de routage de fil électrique pour moteur dans roue

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