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
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
• • 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
  • H02K1/14—Stator cores with salient poles
  • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles

Definitions

• the present invention is based on an electric motor, in particular an electronically commutated DC motor according to the features of the preamble of claim 1.
• Such electric motors consist of a rotor, a stator having a plurality of coils and a motor housing in which both components are accommodated.
• the rotor may be inside or outside.
• the EC motors have the advantage that they have electronic components for commutating the current instead of the collector and the carbon brushes.
• the external rotor in internal rotors is usually glued to the housing, shrunk, clamped or screwed, whereby appropriate combinations are possible.
• an EC direct current motor in which the stator can be fastened by means of screws to an external component, such as a gearbox.
• the motor does not have a separate housing for receiving the rotor-stator assembly.
• the receptacles for the fastening screws are formed outside of the stator yoke ring, whereby the overall space of the motor increases.
• the object of the invention is therefore, for an electric motor of the type described above despite the use of very different housing and laminated core materials with different expansion coefficients and large Tole- A durable and secure mounting of the stator in the motor housing over wide temperature and tolerance ranges provided.
• the bolting of the stator in the motor housing provides for both small and large manufactured quantities a cost-effective and secure attachment without major investments, risks and development costs.
• the plate or plate pack has inwardly directed and evenly distributed radially around the circumference of the laminated core ring arranged stator teeth, each receiving a corresponding winding.
• stator teeth In the interstices forming between the individual stator teeth, holes or openings for receiving the fastening screws are made in the laminated core. In order for space existing in the interior spaces are effectively utilized, so that a total of a compact construction of the engine is ensured.
• the screws fix the stator in the housing.
• the disk set is on one side directly on the housing, while on the other side by the screw heads an axial bias is generated. This avoids the influence of temperature-, force- and time-dependent relaxation and settling properties of additionally used (plastic) components as well as the effects of different coefficients of expansion of different materials during temperature changes, since only components made of ferrous materials are preloaded axially.
• FIG. 1 is a view of a stator of a DC motor
• Figure 2 is an enlarged partial section of the stator
• Figure 4 is an enlarged partial view of the stator.
• the stator 2 of an EC direct current motor consists of a plate or plate pack 4, to which a so-called insulating mask 6 is attached.
• the disk set 4, shaped as a regular hexagon, in the present exemplary embodiment has six openings or bores 8, 10, 12, 14, 16 and 18 in its six corner areas, through which fixing screws 22 are fastened for fastening the stator 2 to a motor housing 20 and into corresponding openings formed in the motor housing 20 dome 23 are screwed.
• a spacer sleeve 25 is arranged in each case between dome 23 and the disk set 4. This allows stators with different laminated core lengths to be integrated into the motor housing 20 in a simple manner.
• the spacer sleeve 25 and the plate pack 4 can rest directly on the motor housing.
• the laminations forming the laminated core are usually by means of paint, foil, oxide layer o. ⁇ . Electrically isolated from each other.
• the screw heads 24 lie directly on the laminated core 4.
• the diameter of the holes 8 to 18 is chosen in relation to the diameter of the fastening screws 22 so that the fastening screws 22 are spaced from the inner walls of the bores 8 to 18.
• stator teeth (not visible) formed, each having a wound coil 26, 28, 30, 32, 34 and 36 made of enameled copper wire.
• the six stator teeth have six pole shoes 40, 42 and 44 oriented toward a central opening 38 (only three of the six pole shoes are in 4), wherein in the central opening 38 of the rotor (not shown) of the EC DC motor is rotatably mounted.
• a corresponding air gap is formed between the rotor and the pole shoes 40, 42 and 44.
• the wound coils 26 to 36 are protected by a suitably plugged or sprayed-on plastic sheath 46, 48 and 50.
• the EC-DC motor described above is very versatile, for example in the automotive sector for steering motors, engine compartment cooling, air conditioning blower, drives for ancillaries and various transmission or cooling medium control systems and for pumps in the automotive or household sector and for drives of bicycle or Mofa- (auxiliary) motor.

Applications Claiming Priority (3)

Publications (1)

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• 2009
  • 2009-12-30 DE DE102009055409A patent/DE102009055409A1/de not_active Withdrawn
• 2010
  • 2010-10-19 CN CN2010800579531A patent/CN102742123A/zh active Pending
  • 2010-10-19 WO PCT/EP2010/065670 patent/WO2011082849A2/de active Application Filing
  • 2010-10-19 EP EP10775744A patent/EP2514070A2/de not_active Withdrawn

Non-Patent Citations (1)

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