Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/02—Arrangements of circuit components or wiring on supporting structure
• • 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
  • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
  • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
  • H02K11/05—Rectifiers associated with casings, enclosures or brackets
• • 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
  • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
• • 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
  • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
  • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

• the present invention relates to an electronic power module and its method of manufacture. It also relates to a rotating electric machine of a motor vehicle comprising this electronic power module. BACKGROUND ART OF THE INVENTION.
• one or more electronic power modules control the currents and voltages applied.
• a common equipment of a motor vehicle is constituted by a reversible rotary electric machine, that is to say which is able to function as a generator and charge a battery when it is coupled to the engine of the vehicle, and operate in engine for starting, or providing additional mechanical power, when powered by the on-board electrical network.
• a rotor comprising permanent magnets and / or an inductor into which an excitation current is supplied;
• a stator comprising phase windings in which phase currents flow.
• an excitation module constituting a regulator brush holder controlling the excitation current
• the modules in the form of housings externally provided with connection elements, are arranged on the rear bearing of the alternator-starter.
• the housings contain electronic components, in particular, most often, power transistors of the MOSFET type, connected to one another by traces of power constituted by a cut sheet, in particular copper.
• the power traces have ends which are all arranged in the vicinity of a first face of the housing.
• the ends of the phase traces are external to the housing and are shaped to fit the ends of the phase windings.
• the ends of the power tracks in the form of blades bent at right angles, protrude outside the housing for their electrical connection with the outside of the module.
• Filler material such as an epoxy resin or a silicone gel, or the like, fills the free interior space of the housing around the power components.
• the present invention therefore aims to design an electronic power module comprising electronic components arranged in a housing and external connection elements comprising at least one trace of power, capable of being electrically connected to a power conductor of a circuit of power of a rotating electrical machine, so as to provide a solution to the problem of congestion mentioned above.
• this electronic power module is remarkable in that its housing and at least one element of a device for measuring an intensity of a current flowing in the power trace form a monobloc assembly.
• This element of the measuring device is advantageously a magnetic circuit, preferably made of ferrite.
• this magnetic circuit is preferably able to surround the power conductor of the rotating electrical machine.
• this magnetic circuit preferably surrounds the power trace of the power electronic module.
• the magnetic circuit is advantageously of annular shape, or, alternatively, of rectangular shape.
• this magnetic circuit comprises a slot adapted to receive a Hall effect sensor.
• the housing, the magnetic circuit and this Hall effect sensor form the monobloc assembly of the electronic power module.
• the Hall effect sensor is then advantageously welded to an electronic board internal to the housing.
• the invention also relates to a method of manufacturing an electronic power module having the characteristics above remarkable in that the one-piece assembly is made by overmolding.
• Figure 1 shows a rear bearing of an alternator-starter comprising three electronic power modules, of the type concerned by the invention, known from the state of the art.
• FIGS 2a and 2b show in detail two examples of power electronic modules known from the state of the art.
• Figures 3a and 3b show the details of a first and second embodiments of an electronic power module according to the invention.
• an electronic power module comprises electronic components which are arranged in a housing and connection elements accessible from the outside for its operation, these connection elements allowing the transmission of control signals and the circulation of strong currents.
• Figure 1 shows power electronic modules 1, 2 of this type arranged on the rear bearing 3 of the three-phase starter-alternator of the state of the art mentioned above.
• This rear bearing 3 comprises three power modules 1 managing the phase currents and an excitation module 2 controlling the excitation current of the electric machine operating as a generator.
• Each electronic power module 1, 2 comprises:
• FIG. 2a shows in detail a power module 1 of the rear bearing of FIG. 1, whose housing 4 is open, with the internal electronic components 8 interconnected by a trace circuit 9.
• a power trace 10 extending externally to the housing 4 comprises, in this first example, a first end 1 1 in the form of a hook for connecting, by welding, brazing or any other suitable method, a phase wire from the stator of the electric machine.
• FIG. 2b A second example of a power electronics module 1, 2 known from the state of the art is shown in FIG. 2b.
• a power trace 10 extending outside the general envelope of the power module 1 comprises a second end 12 in the form of a tab perpendicular to the plane of the trace circuit 9 for connecting, by welding, brazing or any other suitable method, a phase tab 13 from the stator of the electric machine.
• the inventive entity has integrated this measuring device in the power module 1, while limiting the impact on the volume of the complete system and also on the integration of the PCB.
• At least one element of the measuring device 14, 16, 17 of the intensity of the current flowing in the phase trace 10 of the power module 1 forms with the housing 4 a one-piece assembly.
• a first ferrite ring-shaped magnetic circuit 14 is arranged close to the housing 4 opposite the end 12 forming a trace lug. of power 10.
• the ring 14 has a radial slot 15 adapted to receive a Hall effect sensor 16 whose signals are processed by an appropriate electronic circuit of the "ASIC" type integrated in the housing 4 so as to provide a measurement of the current intensity. flowing in the phase circuit 13, 12, 10.
• a second magnetic circuit 17 of rectangular ferrite shape is arranged near the housing 4 by surrounding the power trace 10 between the leg end 12 and the casing 4.
• the Hall effect sensor 16 arranged in the slot 15 constituting a continuity solution of the second magnetic circuit 17 is connected to the ASIC 8 integrated in the housing 4 which processes the sensor signals and provides the intensity measurement. required.
• the one-piece assembly consisting of the housing 4, the first or second magnetic circuit 14, 17 and the Hall effect sensor 16 is formed by overmolding these components.
• first and second magnetic circuits 14, 17 shown are only examples: different magnetic circuits could be more suitable for other configurations of power modules 1, power traces 10 or ends 13 of the phase windings.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=48225045

Family Applications (1)

Country Status (7)

Families Citing this family (4)

Citations (1)

Family Cites Families (12)

• 2013
  • 2013-03-08 FR FR1352078A patent/FR3003103B1/fr active Active
• 2014
  • 2014-03-05 CN CN201480012996.6A patent/CN105027399A/zh active Pending
  • 2014-03-05 JP JP2015560747A patent/JP2016510204A/ja active Pending
  • 2014-03-05 EP EP14713533.9A patent/EP2965407A2/de not_active Withdrawn
  • 2014-03-05 US US14/772,891 patent/US20160021775A1/en not_active Abandoned
  • 2014-03-05 KR KR1020157025130A patent/KR20150127099A/ko not_active Application Discontinuation
  • 2014-03-05 WO PCT/FR2014/050497 patent/WO2014135796A2/fr active Application Filing

Patent Citations (1)

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