Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/02—Synchronous motors
• • 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
  • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
• • 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
  • 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 present invention relates to an electric machine with a
• the electric machine is a so-called wet-rotor machine with a split pot, which has a
• Electric machines in the form of EC wet rotor motors are in
• a control electronics e.g. integrated in the form of a circuit board in a dry area of the electric machine.
• the rotor is arranged in the wet area and the stator in the dry area, usually only internal rotor motors are realized, otherwise the wet bulk loss is disproportionately large at large rotor diameters.
• the resulting heat is transmitted via a good heat connection, e.g. via thermally highly conductive, short copper pipes, often with large cross sections, and / or via thermal radiation from the stator directly to the
• Control electronics can be significantly reduced.
• the radiant heat from the stator to the control electronics can be reduced and also the heat conducted via electrical contacts from the stator to the control electronics can be reduced.
• an insulating element is used, which divides the dry area of the electrical machine heat radiation technology into a first and a second sub-area.
• the stator is arranged in the first subregion and the control electronics in the second subregion.
• the isolation element forms a shield for the control electronics from the stator.
• Verschaltungselement a first and / or a second section in meandering form.
• the first meander serve for connection to the control electronics and the second meander for connection to the stator.
• the two meanders make it possible that the individual components of the electrical machine due to different
• the interconnection element is formed in two parts with a first interconnection part and a second interconnection part.
• first and second meander structure arranged on the second interconnection part.
• the two meander structures are located in the heat-shielded second area of the drying area.
• a region of the interconnection element is completely surrounded by the insulation element. This makes it possible to ensure that as little heat as possible is caused by radiation in the second region of the
• Dry area is transferred and as much heat from
• the insulating element is made of plastic.
• the insulating element is particularly preferably a plastic encapsulation or a plastic plug-in part which is arranged on the interconnection element.
• Control electronics save a lot of space, since only one or a few solder pot are necessary. As a result, an even more compact construction can be made possible.
• a Verschaltungselement which produces an electrical contact between the stator and the control electronics, arranged such that it partially rests on the split pot or has the best possible thermal connection to the containment shell.
• a transfer of heat from the interconnection element to the containment shell is made possible, so that the heat conducted via the interconnection element into the control electronics is significantly reduced.
• the containment shell can form a heat sink.
• a particularly compact design is obtained when the interconnection element rests against a bottom region of the containment shell.
• the electric machine according to the invention is preferably an EC motor.
• a preferred field of application of the invention are in pumps for vehicles or in building services, as well as in valves and in others
• Figure 1 is a schematic half-sectional view through a
• Figure 2 is a schematic half-sectional view along the line II-II of
• FIG. 1 A first figure.
• the electric machine 1 comprises a stator 2 and a rotor 3, wherein a gap pot 4 is arranged between the stator and the rotor.
• the split pot 4 divides the electric machine into a wet area 5 and a
• the containment shell 4 is fixed to the housing, wherein the housing comprises a motor housing 14, a cover 15 and a pump housing 16.
• the rotor 3 is fixed to a rotor shaft 32 and comprises
• the rotor shaft 32 is formed as a hollow shaft and mounted on two bearings 33, 34 on a stationary axle 35.
• the axis 35 is fixedly fixed to the containment shell 4 in a correspondingly formed recess in the bottom 40 of the containment shell.
• the stator 2 comprises a disk pack, a winding and a first and a second insulating mask 20, 21.
• the electric machine 1 further comprises a two-part interconnection element with a first interconnection element 7 and a second one
• the first interconnection element 7 is connected to the winding via an electrical contact 12 and part of the stator 2. Furthermore, the first interconnection element 7 is connected to the second interconnection element 8 via an electrical contact 13. The second interconnection element 8 is connected via an electrical contact 90 to a control electronics 9 in the form of a printed circuit board.
• the printed circuit board 9 is arranged in a second subregion 61 of the drying region 6.
• the stator 2 is arranged in a first sub-area 60 of the drying area 6.
• the first and second sub-areas 60, 61 are separated from each other by an insulating member 10.
• a bushing 11 is formed in the insulating element 10, through which the first interconnecting element 7 is passed.
• the insulating member 10 of this embodiment is a
• Plastic extrusion which surrounds the second interconnection element 8 at least partially.
• the insulating element 10 forms a complete insulation of the second in the lower region 10a
• Interconnection element 8 is, as can be seen from FIG. 1, arranged on or at least partially a bottom 40 of the containment shell 4. In this area, the insulating element 10 may be arranged only on the side facing the control electronics 9 side on the second interconnection element 8.
• the arrows A indicate a heat transfer from the second interconnection element 8 via the bottom region of the containment shell 4 into the wet region 5.
• the second interconnection element 8 comprises a first meandering section 80 and a second meandering section 81.
• the two meandering sections 80, 81 are arranged in the second subregion 61 of the drying zone 6.
• Meander sections 80, 81 allow in particular a different thermal expansion of components, without causing damage to the components occurs. Furthermore, the two meander sections 80, 81 in particular protect the control electronics 9 even when used in the automotive industry. Range largely against too high static and dynamic forces, since these meander sections provide a resilient function to some extent.
• electrical contacts 90 which form a connection between the second interconnection element 8 and the
• solder pot must be provided for each electrical connection, but the electrical connections 90 according to the invention can be arranged on a common solder pot 90.
• the control electronics 9 can be arranged in a second sub-area 61 of the drying area 6, which is thermally shielded by the insulating element 10 from the first sub-area 60, in which the stator 2, which is a main heat source of the electrical machine, is arranged.
• the insulating element 10 extends from a cylindrical region of the can 4 to the motor housing 14.
• heat radiation from the stator 2 to the control electronics 9 can be reduced.
• a heat conduction from the stator 2 via the first and second Verschaltungselement 7, 8 to the control electronics 9 is also reduced here, since the second Verschaltungselement 8 with the bottom 40 of the split pot is ideally in the best possible heat transfer connection.
• the heat introduced from the stator 2 into the interconnection elements 7, 8 can be released to the containment shell 4 and from there into the wet area 5.
• the meander sections 80, 81 further ensure flexible connection of the control electronics 9 to the stator 2, so that different
• the electric machine according to the invention nevertheless has a very compact construction and can be produced very inexpensively, in particular if the insulating element 10 is provided as a molded part.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Motor Or Generator Cooling System (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44992922

Family Applications (1)

Country Status (6)

Families Citing this family (6)

Citations (1)

Family Cites Families (12)

• 2010
  • 2010-12-27 DE DE102010064190A patent/DE102010064190A1/de not_active Withdrawn
• 2011
  • 2011-11-18 US US13/976,161 patent/US9184645B2/en not_active Expired - Fee Related
  • 2011-11-18 EP EP11784499.3A patent/EP2659572A2/de not_active Withdrawn
  • 2011-11-18 JP JP2013546634A patent/JP5721861B2/ja active Active
  • 2011-11-18 WO PCT/EP2011/070417 patent/WO2012089406A2/de active Application Filing
  • 2011-11-18 CN CN201180062841.XA patent/CN103262392B/zh not_active Expired - Fee Related

Patent Citations (1)

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