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
  • H02K1/14—Stator cores with salient poles
  • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
  • H02K1/148—Sectional cores
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K16/00—Machines with more than one rotor or stator
• • 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

Definitions

• Electric motor for operating a concealment or sun protection element in a building.
• the invention relates to the field of synchronous electric motors with low power electronic switching for driving blackout or sun protection elements in buildings.
• Such motors must have a large torque in a small footprint, allowing them to be integrated into a substantially rectangular section box, for example a Venetian blind rail.
• the patent application JP 9-247911 also has a modular structure in several successive phases along the same rotor.
• This structure has the advantage of being centered.
• it is a variable reluctance motor, and the magnetic poles of the stator thus have a very small dimension with respect to the diameter of the rotor.
• the interior space available in a phase in the absence of the rotor is very large, allowing for example to separately insert the two coils relative to the same phase, each winding can be performed on a separate carcass, which n is not possible in the case of a small diameter magnet motor.
• the object of the invention is to provide an electric motor that obviates these disadvantages and improves the motors known from the prior art.
• the electric motor according to the invention makes it possible to obtain a large power with a given space requirement, to obtain a rotor centered in the motor structure and to position a rotor position sensor which is insensitive to the magnetic field created by the windings. .
• the electric motor according to the invention is defined by claim 1.
• FIG. 1 represents a phase of the engine according to the invention, seen in perspective.
• FIG. 2 represents a phase and the motor rotor in section in a median plane P1 perpendicular to the axis of the rotor.
• FIG. 3 represents a first embodiment of the motor, with two phases oriented along the same direction.
• FIG. 4 represents a second embodiment of the motor, with two phases oriented in two perpendicular directions.
• FIG. 1 represents a partial view of a phase 10 of the engine according to the invention.
• Phase 10 is also shown in section in a median plane P1 perpendicular to the axis of the rotor in FIG. 2.
• the phase comprises a magnetic circuit formed by the combination of a first module 1 1 and a second module 12.
• Each of the two E-shaped modules has three branches: a central branch (11 1, 121) and two lateral branches (1 12-1 13, 122-123).
• the two modules are arranged vis-à-vis, the central branches being directed towards each other and each constituting a stator pole.
• the phase also comprises a carcass 13, of monobloc type and dimensionally stable, insulating material.
• indeformable is meant “made so that it can make windings on it without significant deformation to the eye.”
• the carcass serves to support a first winding 14 and a second winding 15, whose turns are located in an average plane parallel to the axis of the rotor 16 and perpendicular to the median plane.
• the two coils of the same phase are preferably identical and traversed by the same current, meaning that the coils are connected in series, or that they are connected in parallel on the same supply voltage.
• the thickness of a winding is at least equal to the diameter of the rotor.
• the carcass 13 comprises a central portion 131, a first lateral flange 132 and a second lateral flange 133.
• the central portion and each flange are connected by a non-referenced carcass portion, serving as a hub for each winding.
• the central portion is provided with a first through recess 134, preferably cylindrical, adapted to contain a rotor portion passing through the phase.
• the first recess advantageously comprises a first complementary section 135, and a second complementary section 136, disposed on either side of the first recess, perpendicular to the rotor and to the central branches 111 and 121 of the modules.
• Each complementary section is of polygonal shape constituted by the superposition of a rectangle and a basic trapezium equal to the long side of the rectangle.
• Figure 2 also shows the rotor 1 6 in section.
• the rotor comprises a non-magnetic tube 17, which ensures the rigidity of the rotor.
• the rotor In the active part of each phase, that is to say at least in relation to the central branches of the modules of the magnetic circuit and therefore in particular in the median plane, the rotor also comprises a magnetized material 17, by example an alloy Neodymium-Iron-Boron.
• the non-magnetic tube is made of stainless steel or brass. It can be streaked so as to limit the currents induced.
• the carcass also supports a magnetic sensor 19, for example an induction coil or a Hall effect sensor.
• This sensor is advantageously slid into one of the complementary sections of the central recess: the dimensions of the sensor preferably fixing those of the complementary sections.
• the complementary sections 135 and 136 may have different sections.
• the sensor 19 is sensitive to a component of the flow normal to the plane of the sensor (here defined by the long side of the rectangle and perpendicular to the median plane).
• the sensor is insensitive to the field created by the stator, and thus only translates the field created by the rotor. This structure therefore makes it possible to considerably simplify the capturing of rotor position information, without the need to use the artifices of the prior art.
• FIG. 1 represents the median plane P1, as well as the trace (in dashed line) of the median plane on the second module 12, of which only the lateral branch 123 is visible.
• the trace of the median plane also appears on the first lateral flange 132.
• the median plane P1 of the phase is both perpendicular to the average planes of the turns constituting the coils and perpendicular to the axis of the rotor.
• the carcass 13 is provided with a second through recess 139, of rectangular section, for accommodating the central branch of the corresponding module.
• the modules of the magnetic circuit can be each made in one piece (for example using a sintered ferromagnetic powder) or by sheet metal assembly.
• Figure 1 corresponds to the case of a monobloc type of manufacture.
• the manufacture of the modules can also be carried out by stacking on either side of the median plane P1 of sheets each forming an E. It may be advantageous to alternate the direction of mounting of the sheets so that they are intertwined or overlap at the side branches.
• the recovery comes from the fact that we give a different length to each of the side branches of a sheet, one upper and the other less than the length to cover exactly one half carcass.
• the overall air gaps of the lateral branches disappear, short-circuited by the overlapping areas, even if the individual air gaps AG1 and AG2 remain between the sheets located in the same plane.
• This interlaced arrangement contributes little to the performance of the engine (as indicated above, the role of side air gaps is negligible), but can give a better mechanical cohesion to the assembly, and reduce parasitic vibrations.
• FIG. 3 represents a first motor 100 comprising two parallel phases referenced 20 and 30 and a cylindrical rotor 40.
• the assembly is contained in a parallelepipedal casing, not shown, in particular ensuring the maintenance of the magnetic modules and supporting bearings or bearings guiding the rotor.
• the modules masking the second recesses are not shown.
• the rotor 40 is shown in the first recess and also out of its housing, so as to include areas of the rotor requiring magnetization.
• first magnetization zone 41 and a second magnetization zone 42 there is at least one first magnetization zone 41 and a second magnetization zone 42, each corresponding to a phase portion.
• the magnetization area relative to each phase corresponds to the rotor portion vis-a-vis the stator poles.
• the two phases 20 and 30 being aligned, it As a result, the magnetization directions F1 and F2 of the two zones 41 and 42 must be perpendicular to one another.
• the carcass 13 is provided with attachment means to another carcass.
• These attachment means comprise, for example, holes 137 and 138 parallel to the axis of the rotor and made in the central portion 131, as shown in FIG. 1.
• FIG. 3 also represents the means of mutual engagement of the two phases, symbolized by the through holes 337 and 338. Unrepresented screw-nut devices are engaged in these holes to hold the two assembled phases.
• FIG. 4 represents, with the same conventions, a second motor 200 comprising two crossed phases referenced 50 and 60 and a cylindrical rotor 70. This time, the two magnetization zones 71 and 72 of the rotor are magnetized in parallel directions F3 and F4 between they.
• Holding notches 201 and 202 are used to wedge each central portion in the side flanges of the other phase, and / or mutual clipping means 203 and 204.
• Such clipping means can also be used in the case of FIG.
• the magnetized material continuously occupies the entire rotor tube, or at least the entire portion of the tube entering the phases, and it is simply the magnetization operation which fixes the desired directions F1 -F2 or F3-F4 in the magnetization zones.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Permanent Magnet Type Synchronous Machine (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39769505

Family Applications (1)

Country Status (9)

Families Citing this family (7)

Citations (2)

Family Cites Families (20)

• 2007
  • 2007-12-28 FR FR0709174A patent/FR2925989B1/fr not_active Expired - Fee Related
• 2008
  • 2008-12-23 JP JP2010540200A patent/JP2011508587A/ja not_active Withdrawn
  • 2008-12-23 EP EP08866901A patent/EP2201662A1/de not_active Withdrawn
  • 2008-12-23 WO PCT/IB2008/055503 patent/WO2009083898A1/fr active Application Filing
  • 2008-12-23 AU AU2008345336A patent/AU2008345336A1/en not_active Abandoned
  • 2008-12-23 KR KR1020107016724A patent/KR20100106531A/ko not_active Application Discontinuation
  • 2008-12-23 US US12/809,955 patent/US8461736B2/en not_active Expired - Fee Related
  • 2008-12-23 RU RU2010131452/07A patent/RU2010131452A/ru not_active Application Discontinuation
  • 2008-12-23 CN CN200880125288.8A patent/CN101926071B/zh not_active Expired - Fee Related

Patent Citations (2)

Non-Patent Citations (1)

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