Classifications

• • 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
• • 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
  • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
  • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
  • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/02—Casings or enclosures characterised by the material thereof
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
  • H02K9/223—Heat bridges

Definitions

• the present invention relates to an electric motorization device that can be used in particular for moving actuators.
• Such a motorization device generally comprises an electric motor comprising a housing in which is fixed a stator surrounding a rotor fixed to an output shaft pivotally mounted in the housing by means of two ball bearings arranged on either side of the rotor.
• the output shaft has an end portion projecting from the housing to cooperate with a driven element of the actuator and a control module is generally mounted outside the housing facing the end portion projecting from the housing. detecting an angular position of the output shaft and controlling the motor according to this detected position.
• the portion of the shaft extending beyond the bearing, on the side of the projecting end is relatively large so that it must have a relatively high flexural strength when subjected to transverse forces as this is particularly the case if the end portion of the shaft is associated with a pinion meshing with a toothed wheel of the actuator. It has been envisaged to ensure the rotational guidance of the projecting end portion of the shaft via a third bearing.
• Such an assembly raises problems of realization in particular in the precision of machining. This assembly is also hyperstatic and leads to a decrease in engine efficiency and an increase in bearing wear.
• An object of the invention is to provide a motorization device having a compact structure and resistant to mechanical stresses.
• a motorization device comprising a housing in which is fixed a stator surrounding a rotor fixed to a shaft and having a first end portion and a second end portion which are connected. to the housing respectively by and only by a first bearing and a second bearing, the second end portion extending beyond the second bearing projecting from the housing, and the motorizing device comprising an electronic control module mounted in the housing opposite a portion of the shaft extending between the rotor and the second bearing.
• the two bearings are spaced apart to the maximum, ensuring optimal guidance of the rotating shaft, and the second bearing is at the closest to the end portion intended to cooperate with one actuator, so that this portion of end does not have a cantilever may limit its resistance to stress.
• the second end portion protrudes from an outer surface of a wall against which the electronic control module is mounted and this wall is made of thermally conductive material.
• the actuator can constitute a mass used to dissipate the heat resulting from the operation of the control module.
• the motorization device of the invention is intended to drive in rotation a driven element of any actuator.
• the drive device generally designated 1
• a housing 2 here made in two parts 2.1 and 2.2, a stator 3 fixed in the housing part 2.1 and surrounding a rotor 4 fixed to a shaft 5 .
• the housing parts 2.1 and 2.2 are assembled to one another by means known per se, preferably providing a removable assembly such as screws or bolts.
• the housing portion 2.2 has a wall 10 having an outer bearing surface 11 on an actuator 100, here shown schematically in phantom, and is provided with means not shown for attachment to the body of one actuator. This attachment is for example provided by screwing or bolting.
• the stator 3 and the rotor 4 are known per se, as is their mode of attachment in the housing 2.
• the stator 3 is supplied with alternating current and the stator-rotor assembly functions in the same way as an engine. brushless type ("brushless").
• the shaft 5 comprises a first end portion 5.1 connected to the housing portion 2.1 by a bearing 6 and a second end portion 5.2 connected to the housing portion 2.2 by a bearing 7.
• the bearings 6 and 7 are here ball bearings but may be roller bearings, needle bearings, or plain bearings.
• the second end portion 5.2 of the shaft 5 protrudes from the surface 11 to the outside of the housing 2 and is equipped with means for transmitting a copy to a driven element of the actuator 100.
• These means may comprise a toothing, splines, lugs, a pinion gear, a pulley connected to the element driven by a belt, etc.
• the drive device 1 also comprises a control module, symbolized at 8, mounted in the housing 2 opposite a portion 5.3 of the shaft 5 extending between the rotor 4 and the bearing 7.
• the module control 8 is fixed against the wall 10.
• the control module 8 is arranged to drive the supply of the stator windings 3 so as to drive the rotor 4 in rotation.
• the control module 8 here comprises a connection member 9 to an electrical power supply source and a plurality of printed circuit boards 12, 13, 14 which are superimposed and which extend perpendicularly to the shaft 5. 12, 13, 14 have a through hole for the shaft 5.
• These cards 12, 13, 14 carry control components 15 and power components 16.
• the power components 16 extend here in space defined between the cards 12 and 13 (the power components can be arranged equally or alternately between the cards 13 and 14).
• the card 12 closest to the motor is provided with 17 magnetic field sensors.
• a disc 18 provided with magnetized portions 19 is fixed to the shaft 5 to pivot facing the sensors 17 by forming therewith a detecting member of the angular position of
• the drive device 1 is intended to be fixed on the actuator 100 via the housing portion 2.2 fixed so that the bearing surface 11 is applied against the body of the actuator
• the housing 2, and more particularly the housing portion 2.2, the wall 10 and the body of the actuator are made of thermally conductive materials to allow evacuation of the heat generated during operation of the control module 8.
• This material is for example a metal such as aluminum.
• the structure of the motorization device may have differences with respect to that described: the housing may for example be made in part or in more than two parts, the rotor-stator assembly may be arranged to function as a brush motor, the control module may not include a position detector, the connector of the control module to the source of electrical energy may be replaced by cables ...
• the housing may for example be made in part or in more than two parts
• the rotor-stator assembly may be arranged to function as a brush motor
• the control module may not include a position detector
• the connector of the control module to the source of electrical energy may be replaced by cables ...
• step we mean in the description any guide member in rotation and in particular smooth bearings or bearings with rolling elements such as ball bearings, needle bearings or roller bearings.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=37949623

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (10)

• 2006
  • 2006-10-12 FR FR0608922A patent/FR2907274B1/fr not_active Expired - Fee Related
• 2007
  • 2007-10-10 WO PCT/FR2007/001652 patent/WO2008046983A2/fr not_active Ceased
  • 2007-10-10 EP EP07858419A patent/EP2076958A2/de not_active Withdrawn
  • 2007-10-10 JP JP2009531875A patent/JP2010506557A/ja active Pending

Non-Patent Citations (1)

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