Classifications

• • 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
• • 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
  • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
  • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• • 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
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements

Definitions

• the invention relates to a device for electrical connection between an electric motor and a power supply unit of said motor. It also relates to a motor equipped with said device and an assembly formed of said motor and its power unit. It will find more particularly its applications in the field of compressors, particularly electric compressors, for example for the circulation of a refrigerant inside a vehicle air conditioning system.
• An electric compressor typically comprises a compression mechanism, driven by an electric motor, to pressurize the coolant in the air conditioning circuit.
• the compressor further comprises an inverter for converting the available current into a current suitable for the compressor motor.
• the inverter is adapted to convert a direct current into a three-phase alternating current.
• the invention proposes to overcome the aforementioned drawbacks and concerns for this purpose a device for electrical connection between an electric motor and a power supply unit of said motor, in particular for a motor vehicle compressor, said device comprising a connection plug formed in a flexible metal sheet configured to allow blind mounting of the motor on the power unit with mechanical contact and electrical connection between said connector plug and a connector of said power unit. Thanks to the use of a defined conductor in a metal sheet, it is possible to have a connection plug with a large cross-section, in a limited space requirement. In addition, it is possible to form said connection plug so that it allows blind mounting. In addition, because of the small size of said plug, it limits the pressure losses in case of fluid circulation around the engine, as is the case in an electric compressor for a motor vehicle. By the flexible nature of the sheet, there will also be a solution for resisting vibration effectively.
• Said device comprises a conductor intended to be electrically connected to several windings of the motor,
• connection plug is electrically connected to said conductor
• said conductor consists of a metal sheet
• Said sheet metal is in the form of a ring
• Said metal sheet has a substantially rectangular cross-section
• - Said device is configured so that a large side of the cross section of said metal sheet being intended to be oriented along a longitudinal axis of a rotor of said engine, after assembly,
• Said device comprises pins, electrically connected to said conductor, each of said pins being intended to be connected to one of the windings of the motor,
• Said pins are L-shaped, one of the branches of the L being oriented radially and the other of the branches of the L being intended to be oriented along said longitudinal axis of the rotor of the engine, after assembly,
• Said device comprises a plurality of said conductors, each associated with a said connection plug,
• connection plugs are angularly offset from one to the other of the conductors
• connection plugs are located in the same angular sector less than 90 ° or 45 ° or even 30 °, - The connection plugs have a different angular orientation,
• the one or more connectors and the one or more connection plugs are overmolded, in particular of an electrical insulating material, to form a unitary assembly
• connection plug includes a contact portion with the connector of the power supply unit and a connecting portion configured to give flexibility to the mechanical contact established between said device and said power supply unit,
• Said connecting portion comprises a lyre-shaped zone
• Said contact portion is configured to allow the establishment of said mechanical contact in a translational movement along the longitudinal axis of the rotor of said motor
• Said contact portion comprises an end intended to come into touching contact with the connector of said connecting unit
• Said contact portion comprises one or more flanks intended to come into contact with a lateral wall of the connector of said connecting unit;
• Said sidewalls are located at a bent zone of said contact portion
• Said contact portion is configured to allow mounting in a translational and rotational movement
• Said contact portion comprises a housing for engaging the connector of the power supply unit in a translation movement along the longitudinal axis of the rotor of said motor,
• Said contact portion comprises a blocking housing of the connector of the power supply unit
• the invention also relates to a motor provided with a connection device as described above and an assembly formed of said motor and its power unit. According to complementary characteristics, which can be taken together or separately:
• - Said connector consists of a connection plug
• Said feeder connection plug comprises a core of a first metallic material and a skin of a second metallic material
• - Said first material is copper.
• said assembly further comprises a compressor, driven by said motor, so as to form an electric compression device.
• FIG. 1 is a longitudinal sectional view of a compression device according to the invention
• FIG. 2 is a cross-sectional view of a part of the engine and of the connection device of the compression device of FIG. 1, in a position where the engine is being assembled on its power unit;
• FIG. 3 shows FIG. 2 in assembled position,
• FIG. 4 shows FIG. 3 in perspective
• FIG. 5 schematically illustrates, in an axial view and after flattening, a conductor and a connection plug of the connection device of the preceding figures
• FIG. 6 illustrates a longitudinal sectional view of an alternative embodiment of the connection plug of the connection device according to the invention.
• the invention relates to a compression device.
• Figure 1 must therefore show at least schematically that the end of the tree causes a compression system.
• the latter can be used for the compression of fluids of different kinds and can be mounted on any type of mobile device as well as fixed. It is however more particularly intended for the circulation of a refrigerant inside an air conditioning circuit of a motor vehicle on the chassis of which it will be fixed, directly or indirectly.
• Said electric compression device comprises a compressor, not shown, a motor or electric machine 3 for driving the compressor and a device 5 for converting current, mounted on said machine.
• Said conversion device 5 is configured to allow the supply and control of said electric machine 3. It thus serves as a power supply unit of the engine.
• the compressor is advantageously of the spiral compression type
• Said electric machine 3 is, for example, a three-phase electric motor.
• Said conversion device 5 is, for example, an inverter, namely a device for converting a direct current, for example delivered by a battery, into an alternating current, in particular a three-phase alternating current.
• the compressor may comprise a housing in which compression members are housed.
• the electric machine 3 comprises a housing 30 in which are housed a stator 34 and a rotor 32 of said electric machine.
• Said housings are, in particular, of hollow cylindrical shape. They extend longitudinally along a longitudinal axis common to a shaft of said compressor and the rotor of said electric machine.
• the compressor housing and / or the housing 30 of the electric machine are, for example, aluminum or aluminum alloy.
• Said electric machine 3 is advantageously configured to be fixed on a support, in particular the chassis, the drive motor or the gearbox of the equipped vehicle.
• the stator 32 comprises a body 36 provided with teeth 38
• the body 36 of said stator 32 is formed, for example, by stacking a package of sheets.
• Said stator 32 further comprises windings 42, located around each of the teeth 38 and occupying said notches 40.
• Said windings 42 are advantageously connected to each other in a three-phase configuration in the triangle and triangle (because no neutral points) (must be put both types of connection.
• Said compression device is preferably configured so that the refrigerant passes through said electric machine 3 by coming into contact with said conversion device 5 so as to cool them.
• a passage for the fluid can be advantageously provided between said electric machine 3 and the compressor 1.
• Said conversion device 5 comprises a body 50, configured to be mounted on the electric machine 3.
• said body 50 of the conversion device and said housing 30 of the electric machine 3 are two separate parts reported to each other.
• Said conversion device 5 is here mounted cantilevered on said electric machine 3. It has, for example, a cylindrical configuration, in particular coaxial with the casings of the compressor and / or the electric machine 3.
• Said conversion device comprises in particular, current conversion means, not shown, housed in said body 50.
• Said conversion means may comprise, for example, bridges of transistors mounted on printed circuit boards.
• Said device further comprises electrical connectors 52 for supplying said electrical machine 3, here three for the three-phase power supply.
• This is, for example, connection plugs in the form of substantially rectilinear rods, in particular arranged at the top of a triangle.
• Said body 50 is advantageously monobloc, in particular from foundry. It may be configured to promote cooling of said conversion means.
• the power network used for powering the electrical machine is here provided at a relatively low voltage, for example less than 60V, involving the use of currents high amperage, especially peaks.
• a device 60 for electrical connection between the electric motor 3 and the power supply unit 5 of said motor is provided. It is in this way located between said electric motor 3 and said feed unit 5.
• Said connecting device 60 comprises one or more connection plugs 62a, 62b, 62c, here three, namely one for each phase of the motor although in Figure 1, only one of said connection plugs 62 is visible.
• Said connection plugs are intended to allow the circulation of an electric current for supplying the motor from said power supply unit 5. They are each formed in a flexible metal sheet. They are further configured to allow blind mounting of the motor on the power unit with mechanical contact and electrical connection between each connector plug 62 and the associated connector 52, as will be discussed in more detail below.
• said device comprises one or more conductors 64a, 64b, 64c, here three, namely one for each phase of the motor, intended to be electrically connected to several of the windings 42 of the motor.
• Each connection plug 62a, 62b, 62c is electrically connected to one of said leads 64a, 64b, 64c.
• Said conductors 64a, 64b, 64c are each constituted by a metal sheet bus bar.
• Said metal sheet is here in the form of a ring. It may have a rectangular cross section.
• connection plugs 62a, 62b, 62c are advantageously angularly offset from one another to the conductors 64a, 64b, 64c. They are here located in the same angular sector less than 90 ° or 45 ° or even 30 °.
• said device is configured so that a large side of the cross section of said metal sheet is oriented along a longitudinal axis of the rotor 32 of said motor, after mounting.
• said conductors 64a, 64b, 64c and said one or more connection plugs are overmolded with a material 68, electrical insulator, to form a unitary assembly, here having the configuration of a ring, centered on one end of the rotor 32.
• said device may comprise pins 66, electrically connected to said conductor 64a, 64b, 64.
• Each of said pins 66 is intended to be connected to one of the windings 42 of the motor 3.
• Said pins 66 are here in accordance with FIG. L-shaped, one of the branches of the L being oriented radially and the other of the branches of the L being oriented along said longitudinal axis of the rotor 32 of the engine 3, after assembly.
• the radial branches are fixed, in particular soldered and / or welded, to one of the conductors 64a, 64b, 64c while the other branches are attached to one end of the windings 42.
• the motor here comprises fifteen windings 42 and, for the desired assembly, each conductor 64a, 64b, 64c is connected to ten windings 42 of the motor 3 by one of said pins 66.
• Said conductors 64a, 64b, 64c are arranged, for example , concentrically.
• connection plug 62a, 62b, 62c includes a portion 70 of contact with the associated connector 52a, 52b, 52c of the power unit and a connecting portion 72 configured to provide flexibility for mechanical contact established between said connection and said power supply unit 5.
• Said connecting portion 72 comprises a radial portion, connected to the conductors 64a, 64b, 64c, and an angularly extending portion, situated between said radial portion and said contact portion 70.
• Said connecting portion 72 in particular said portion portion extending angularly, may include a zone 74 in the form of a lyre to enhance its flexibility.
• Said contact portion 70 is preferably configured to allow mounting in a translation movement and rotation also called bayonet mounting.
• Said contact portion 70 comprises a housing 75 for engaging the connector 52 of the power supply unit in a translation movement along the longitudinal axis of the rotor of said motor.
• Said contact portion further comprises a housing 76 for locking said connector 52.
• Said engagement housing 75 and said blocking housing 76 communicate with each other so as to allow the passage of the connector 52 of the power supply unit of the to one another in a rotational movement about the longitudinal axis of the rotor of said motor.
• said engagement housing 75 translational guide said connectors 52a, 52b, 52c during a first phase of the movement, as shown in FIG. 2, then, by rotation according to the arrow marked 78, said connectors are respectively inserted into the said housing 76 blocking the connection plugs 62a, 62b, 62c.
• Said engagement housing 75 and said blocking housing 76 are herein defined by an omega shape of the contact portion 70, respectively by the open portion and bottom of said omega shape.
• Such an omega shape allows snap locking connectors 52a, 52b, 52c in said connection plugs 62a, 62b, 62c.
• studs may be used to lock in rotation the housing 30 of the motor and the body 50 of the feed unit, said studs being introduced into the orifices of each of these parts, said orifices being then in vis-à-vis.
• connection plugs 62a, 62b, 62c advantageously have a different angular orientation.
• the connection plugs 62a, 62c of the internal and external conductors 64a, 64c are oriented in a direction that can be described as anti-clockwise while the 62b connecting plug of the intermediate conductor 62b is oriented in a sense that can be described as time.
• said connection sheets may be of different configuration.
• connection plugs 62a, 62c of the inner and outer conductors 64a, 64c are of identical configuration with a portion 72 of substantially flat connection on either side of the zone 74 in the form of a lyre, in its portion extending angularly, while the connection plug 62b of the intermediate conductor 64b has a different configuration with a substantially rounded connecting portion 72, in its portion extending angularly. It may further be noted that one of the two connection plugs of the inner and outer conductors 64a, 64c, here the external plug 62a is angularly between the other 62c of said two plugs and the third plug 62b.
• said blocking housing 76 comprises concave zones 80 configured to allow multipoint contact with the associated connector 64 of said power supply unit 5.
• Said concave zones 80 are here distributed substantially at 90.degree. the other.
• connection plugs may include teeth 82, spaced apart from each other along said connectors 52a, 52b, 52c (see Figure 4).
• said contact portion 70 is configured to allow the establishment of said mechanical contact in a translational movement along the longitudinal axis of the rotor of said motor, according to the arrow 84.
• said contact portion 70 provides both a guide of said connectors 52 and a contact between them and said plugs 62.
• Said contact portion 70 comprises an end 86 intended to come into touching contact with the connector 52 of said connecting unit.
• Said contact portion 70 also comprises one or more flanks 88 intended to come into contact with a side wall 90 of the connector 52 of said linking unit.
• Said flanks 88 are located at a bent zone of said contact portion 70.
• the connectors 52 of the power supply unit 5 comprise a core 92 made of a first metallic material, for example copper, and a skin 94 made of a second metallic material, for example 'steel.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Frames (AREA)
• Compressor (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54848648

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (11)

• 2015
  • 2015-06-12 FR FR1555373A patent/FR3037446B1/fr not_active Expired - Fee Related
• 2016
  • 2016-06-10 EP EP16731337.8A patent/EP3308451A1/de not_active Withdrawn
  • 2016-06-10 JP JP2017568324A patent/JP2018528741A/ja active Pending
  • 2016-06-10 WO PCT/IB2016/053421 patent/WO2016199077A1/fr active Application Filing
  • 2016-06-10 CN CN201680034371.9A patent/CN107787544A/zh active Pending

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