Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
  • H02K3/28—Layout of windings or of connections between windings

Definitions

• the invention relates to a rotating electric machine stator having an improved hybrid winding configuration.
• the rotating electrical machines comprise a stator and a rotor secured to a shaft.
• the rotor may be integral with a driving shaft and / or driven and may belong to a rotating electrical machine in the form of an alternator, an electric motor, or a reversible machine that can operate in both modes.
• the rotor comprises a body formed by a stack of sheets of sheet metal held in pack form by means of a suitable fastening system.
• the rotor comprises poles formed for example by permanent magnets housed in cavities delimited each by two adjacent rotor teeth.
• the rotor may be a said rotor with salient poles having coils wound around the rotor arm.
• the rotor may also take the form of an alternator rotor comprising polar wheels between which is mounted a coil.
• stator is mounted in a housing configured to rotate the rotor shaft for example by means of bearings.
• the stator includes a body having a plurality of teeth defining notches, and a coil inserted into the stator slots.
• the winding is obtained for example from enamel coated continuous son or from conductive elements in the form of pins joined together by welding.
• US7030533 or US7291954 disclose a coil comprising a first three-phase system and a second three-phase system of the triangle type.
• the winding also comprises a third three-phase system and a fourth three-phase system of the star type.
• the first three-phase system is connected in series with the fourth three-phase system
• the second three-phase system is connected in series with the third three-phase system.
• phase pairs of the first and second three-phase systems are located in the same series of notches
• phase pairs of the third and fourth three-phase systems are located in the same series of notches.
• such a configuration has the drawback of introducing a non-zero electrical angle between the phase voltages of the triangle system and the phase voltages of the corresponding star system. This induces undesirable ripple of the output of the electric machine.
• the first three-phase system being connected in series with the fourth three-phase system
• the second three-phase system being connected in series with the third three-phase system
• At least one phase of the first three-phase system and at least one phase of the third three-phase system are located within the same series of notches, and
• At least one phase of the second three-phase system and at least one phase of the fourth three-phase system are located within a single series of notches.
• the invention thus makes it possible to mechanically correct the electric offset angle between the phases of the different three-phase systems, which in particular makes it possible to minimize the ripples of the output current of the rotating electrical machine.
• a first phase of the first three-phase system and a first phase of the third three-phase system are located in the same first series of notches.
• a first phase of the second three-phase system and a first phase of the fourth three-phase system are located in the same second series of notches.
• a second phase of the first three-phase system and a second phase of the third three-phase system are located in the same third series of notches.
• a second phase of the second three-phase system and a second phase of the fourth three-phase system are located in the same fourth series of notches.
• a third phase of the first three-phase system and a third phase of the third three-phase system are located in the same fifth series of notches.
• a third phase of the second three-phase system and a third phase of the fourth three-phase system are located in the same sixth series of notches.
• the first series of notches receiving the first phase of the first three-phase system and the first phase of the third three-phase system is adjacent to the second series of notches receiving the first phase of the second three-phase system and the first phase of the fourth system. phase.
• the third series of notches receiving the second phase of the first three-phase system and the second phase of the third three-phase system is adjacent to the fourth series of notches receiving the second phase of the second three-phase system and the second phase of the fourth system. phase.
• the fifth series of notches receiving the third phase of the first three-phase system and the third phase of the third three-phase system is adjacent to the sixth series of notches receiving the third phase of the second three-phase system and the third phase of the fourth system. phase.
• the third three-phase system and the fourth three-phase system are each connected to a circuit having a rectifier bridge and / or inverter function.
• the first three-phase system and the second three-phase system are of the triangle type.
• the third three-phase system and the fourth three-phase system are of star type.
• a difference in electrical angle between a voltage of a phase of the first three-phase system and a voltage of a corresponding phase of the fourth three-phase system is zero.
• a difference in electrical angle between a voltage of a phase of the second three-phase system and a voltage of a corresponding phase of the third three-phase system is zero.
• the phases of the third three-phase system and the fourth three-phase system are located on the side of an opening of the notches. This improves the cooling of the machine by exposing the phases traversed by the highest current to the air flow generated by the fan of the electric machine.
• Fig. 1 shows a partial cross sectional view of a rotating electric machine stator according to the present invention
• Figure 2 is a diagram of the electrical assembly of the different three-phase stator systems according to the present invention.
• FIG. 3 is a schematic representation of the coupling between the phases of the different three-phase systems inside the slots of the stator according to the present invention
• FIG. 4 is a schematic representation illustrating the differences in electrical angle between the phase voltages of a triangle system and the phase voltages of a corresponding star system;
• Fig. 5 is a graphical representation illustrating the ripples of the output current of the electric machine
• Figure 6 is a graphical representation of the current signals in the triangle and star systems, as well as the harmonics of these current signals.
• FIG. 1 shows a stator 10 of a rotating electrical machine comprising a body 11 and a coil 12.
• the stator body 11 consists of an axial stack of plane sheets.
• the body 1 1 has teeth 13 distributed angularly in a regular manner. These teeth 13 delimit notches 1 6, so that each notch 1 6 is delimited by two teeth 13 successive.
• the notches 1 6 open axially into the axial end faces of the body January 1.
• the notches 1 6 are also open radially towards the inside of the body January 1.
• the stator body 1 1 can be provided with tooth roots 17 on the free ends of the teeth side 13.
• the winding 12 comprises a first three-phase system a, b, c and a second three-phase system.
• the coil 12 also comprises a third three-phase system A, B, C and a fourth three-phase system D, E, F of the star type.
• the first three-phase system a, b, c is connected in series with the fourth three-phase system D, E, F.
• the second three-phase system d, e, f is connected in series with the third three-phase system A, B, C.
• Each phase is formed of several concentric turns of a conductor 20, such as a continuous copper wire covered with enamel.
• the conductors 20 here have a round section.
• the conductors 20 may have a rectangular section, square, or shaped flat.
• the phases of the three-phase systems in the triangle and the phases of the three-phase star systems may be formed by the same number of turns or a number of different turns.
• the phases of the triangle and star systems are each formed by two turns, so that the stator has four conductors per notch.
• a first phase a of the first three-phase system and a first phase A of the third three-phase system are located in the same first series of notches S1.
• a first phase d of the second three-phase system and a first phase D of the fourth three-phase system are located in the same second series of notches S2.
• a second phase b of the first three-phase system and a second phase B of the third three-phase system are located in the same third series of notches S3.
• a second phase e of the second three-phase system and a second phase E of the fourth three-phase system are located in the same fourth series of notches S4.
• a third phase c of the first three-phase system and a third phase C of the third three-phase system are located in the same fifth series of notches S5.
• a third phase f of the second three-phase system and a third phase F of the fourth three-phase system are located in the same sixth series of notches S6.
• the first series of notches S1 receiving the first phase a of the first three-phase system and the first phase A of the third three-phase system is adjacent to the second series of notches S2 receiving the first phase d of the second three-phase system and the first phase D of the fourth three-phase system.
• the third series of notches S3 receiving the second phase b of the first three-phase system and the second phase B of the third three-phase system is adjacent to the fourth series of notches S4 receiving the second phase e of the second three-phase system and the second phase E of the fourth three-phase system.
• the fifth series of notches S5 receiving the third phase c of the first three-phase system and the third phase C of the third three-phase system is adjacent to the sixth series of notches S6 receiving the third phase f of the second three-phase system and the third phase F of the fourth three-phase system.
• the third three-phase system A, B, C and the fourth three-phase system D, E, F are each respectively connected to a circuit P1, P2 having a rectifier bridge function and / or inverter.
• Each circuit P1, P2 is connected between a positive terminal B + and the system ground.
• the difference in electrical angle between the voltage of the first phase Va of the first three-phase system and the voltage of the first phase VD of the fourth three-phase system is zero.
• the difference in electrical angle between the voltage of the second phase Vb of the first three-phase system and the voltage of the second phase VE of the fourth three-phase system is zero.
• the difference in electrical angle between the voltage of the third phase Vc of the first three-phase system and the voltage of the third phase VF of the fourth three-phase system is zero.
• a difference in electrical angle between a voltage of a phase of the second three-phase system Vd, Ve, Vf and a voltage of a corresponding phase of the third three-phase system VA, VB, VC is zero.
• the difference in electrical angle between the voltage of the first phase Vd of the second three-phase system and the voltage of the first phase VA of the third three-phase system is zero.
• the difference in electrical angle between the voltage of the second phase Ve of the second three-phase system and the voltage of the second phase VB of the third three-phase system is zero.
• the difference in electrical angle between the voltage of the third phase Vf of the second three-phase system and the voltage of the third phase VC of the third three-phase system is zero.
• FIG. 5 shows that the invention makes it possible, at low speeds of rotation, to minimize the output current variation of the electric machine while maximizing its intensity.
• the output current Is reaches 132A for a variation Vond of the order of 3.2A; while the output current of the machine reaches 123A for a variation of the order of 3.7A for a machine provided with the stator as described in the document US7291954.
• the phases of the star systems are situated on the opening side of the notches 16, whereas the phases of the triangle systems (the first system a, b, c and the second system d, e, f are located on the side of a notch bottom 1 6.
• FIG. 6 shows that the first harmonic H1 of the phase current IY for the star systems is larger than that H1 'of the phase current IDelta for the triangle systems.
• the invention also makes it possible to reduce AC losses.
• the amplitude of the third harmonic is also reduced for the current I Delta.

Applications Claiming Priority (2)

Publications (1)

Family

ID=59699915

Family Applications (1)

Country Status (5)

Family Cites Families (11)

• 2017
  • 2017-06-29 FR FR1756017A patent/FR3068537B1/fr active Active
• 2018
  • 2018-06-27 EP EP18732807.5A patent/EP3646441A1/de active Pending
  • 2018-06-27 JP JP2019572462A patent/JP7166299B2/ja active Active
  • 2018-06-27 CN CN201880044115.7A patent/CN111133660B/zh active Active
  • 2018-06-27 WO PCT/EP2018/067303 patent/WO2019002395A1/fr unknown

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