WO2024007709A1 - Stator, moteur à fil plat, ensemble d'alimentation et véhicule - Google Patents

Stator, moteur à fil plat, ensemble d'alimentation et véhicule Download PDF

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Publication number
WO2024007709A1
WO2024007709A1 PCT/CN2023/091821 CN2023091821W WO2024007709A1 WO 2024007709 A1 WO2024007709 A1 WO 2024007709A1 CN 2023091821 W CN2023091821 W CN 2023091821W WO 2024007709 A1 WO2024007709 A1 WO 2024007709A1
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WO
WIPO (PCT)
Prior art keywords
stator
slot
hairpin
hairpin coil
leg
Prior art date
Application number
PCT/CN2023/091821
Other languages
English (en)
Chinese (zh)
Inventor
俞东
赵素珍
岳卫东
汤卫平
巫存
Original Assignee
浙江凌昇动力科技有限公司
浙江零跑科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211252008.8A external-priority patent/CN115955032A/zh
Priority claimed from CN202211245122.8A external-priority patent/CN115765253A/zh
Application filed by 浙江凌昇动力科技有限公司, 浙江零跑科技股份有限公司 filed Critical 浙江凌昇动力科技有限公司
Publication of WO2024007709A1 publication Critical patent/WO2024007709A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • 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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Definitions

  • the technical field of flat wire motors in particular, relates to a stator, flat wire motors, powertrains and vehicles.
  • the flat wire design has poor flexibility
  • the arrangement of the flat wire coils in the stator slots and the improper design of the connection method of the winding incoming and outgoing wires will lead to a wide variety of flat wire coils, resulting in difficulties in production and assembly, tooling and molding Increased costs.
  • the present invention provides a stator, a flat wire motor, a power assembly and a vehicle.
  • the present invention provides a stator for a flat wire motor, including: a stator core.
  • the inner wall of the stator core has s stator slots evenly distributed along its circumferential direction.
  • the stator slots are along the diameter of the stator core.
  • the stator winding includes three-phase windings arranged periodically along the circumferential direction of the stator core.
  • Each phase winding includes b parallel branches, and the b parallel branches are rotationally symmetrical in the circumferential direction.
  • Each phase winding is
  • the parallel branch includes a plurality of hairpin coils connected by connecting wires, and each stator slot is provided with n layers of flat wire conductors of the hairpin coils.
  • the plurality of hairpin coils include at least a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein at least any two sections of the first hairpin coil, the second hairpin coil and the third hairpin coil are The distance is different.
  • the first legs and the second legs of two of the first hairpin coil, the second hairpin coil and the third hairpin coil are respectively located in the first two adjacent groove layers and the second two adjacent groove layers, wherein, the first two adjacent groove layers and the second two adjacent groove layers share a same groove layer.
  • the pitch of the first hairpin coil is s/(2p), and the pitch of the second hairpin coil is s/(2p)+a-4, the pitch of the third hairpin coil is s/(2p)+a, where p is the number of pole pairs of the flat wire motor, a is greater than or equal to 2 and less than or equal to An integer of 4; wherein, in each parallel branch, the first leg and the second leg of the second hairpin coil are located at the kth slot layer and the k+1th slot layer respectively, and the third hairpin coil The first leg and the second leg are respectively located at the k+1th slot layer and the k+2th slot layer, and the first leg and the second leg of the first hairpin coil are both distributed at the 1st slot layer or the nth slot layer; where k is an odd number greater than or equal to 1 and less than or equal to n.
  • the number of slots per pole and phase of the flat wire motor is q
  • the voltage lead-out lines of the b parallel branches of each phase winding are in q stator slots and in the same stator slot in different stator slots.
  • the neutral point lead-out lines of the b parallel branches of each phase winding are within the q stator slots and are in the same slot layer or adjacent slot layers in different stator slots.
  • the voltage lead-out line and the neutral point lead-out line are both located on the first slot layer or the n-th slot layer.
  • the welding pitch between the hairpin coils in each parallel branch is s/(2p).
  • n is an even number
  • the polarity distribution of each odd-numbered layer is the same, and each The polarity distribution of the even-numbered layers is identical and is offset by one stator slot relative to the polarity distribution of the odd-numbered layers.
  • each phase includes three parallel branches.
  • the pitch combination of the hairpin coils in each parallel branch is 12 and 16, and the welding pitch between the hairpin coils in each parallel branch is 11.
  • the number of slot layers of the stator slots is one of 4, 6, 8 and 10
  • the pitch combination of hairpin coils in each parallel branch is 10, 12, 14, and each parallel branch
  • the welding pitch between the hairpin coils in the branch is 13.
  • the pitch of the first hairpin coil is s/(2p), and the first leg and the second leg of the first hairpin coil are respectively located at the 2t-1 slot layer and the 2t slot layer, where p is The number of pole pairs of the flat wire motor is t ⁇ (n-1)/2.
  • the pitch of the second hairpin coil is s/(2p)-1, and the first leg and the second leg of the second hairpin coil are respectively located at the 2t slot layer and the 2t+1 slot layer.
  • the pitch of the third hairpin coil is s/(2p)+1, and the first leg and the second leg of the third hairpin coil are respectively located at the 2t slot layer and the 2t+1 slot layer.
  • each of the phase windings further includes a fourth hairpin coil and a fifth hairpin coil, wherein the fourth hairpin coil and the fifth hairpin coil are located on different parallel branches in the corresponding phase windings; wherein , the pitch of the fourth hairpin coil is s/(2p)-1, and the first leg of the fourth hairpin coil and the second leg are both located at the nth slot layer; the pitch of the fifth hairpin coil is s/(2p)+1, and the first leg and the second leg of the fifth hairpin coil are also located at the nth slot layer .
  • first hairpin coils distributed in the same slot layer number, and the first hairpin coils distributed in the same slot layer number pass between every other first hairpin coil.
  • the welding end of the first hairpin coil is welded and connected.
  • each phase winding includes two parallel branches.
  • the hairpin coil of each parallel branch traverses n slot layers in different stator slots.
  • the hairpin coil includes a first leg, a second leg, a connecting section, a first bending section and a second bending section.
  • the first leg and the second leg are arranged in parallel and inserted into different The slot layer of the stator slot, the connecting section is connected to one end of the first leg and the second leg, the first bending section is connected to the other end of the first leg, the second bending section A section is connected to the other end of the second leg, and the first bending section and the second bending section are also connected to welding ends.
  • the bending directions of the first bending section and the second bending section are identically parallel or arranged symmetrically.
  • the present invention provides a flat wire motor, including a rotor and a stator as described above.
  • the rotor is disposed in a space surrounded by the inner wall of the stator core.
  • the present invention provides a power assembly, including a reducer and the flat wire motor as described above, and the flat wire motor is drivingly connected to the reducer.
  • the present invention provides a vehicle, including the powertrain as described above.
  • this application discloses a stator, a flat wire motor, a power assembly and a vehicle.
  • the magnetic field distribution of the multiple parallel branches in each phase winding is the same and the potential is balanced, thus avoiding the circulation current generated between the parallel branches, thus greatly reducing the
  • the additional AC copper loss at small high frequencies improves the efficiency of the flat wire motor during high-speed operation, avoids local overtemperature of the winding, and extends the life of the flat wire motor; and the hairpin coils of each parallel branch are in different stator slots
  • the potential phase difference caused by the position of the multiple parallel branches in the stator slots in each phase winding can be eliminated, and by limiting the type of hairpin coils in each phase winding, it is possible to use fewer types of The hairpin coil realizes the winding wiring of the stator in the flat wire motor, broadens the design method of the flat wire motor wind
  • Figure 1 is a schematic structural diagram of an embodiment of a stator of a flat wire motor provided by this application;
  • FIG 2 is a schematic structural diagram of the stator core in the stator shown in Figure 1;
  • FIG 3 is a structural schematic diagram of the hairpin coil in the stator shown in Figure 1;
  • FIG 4 is another structural schematic diagram of the hairpin coil in the stator shown in Figure 1;
  • Figure 5 is a schematic winding diagram of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 3;
  • Figure 6 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 5;
  • Figure 7 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 5;
  • Figure 8 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 3;
  • Figure 9 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 8;
  • Figure 10 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 8;
  • Figure 11 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 8, and a is 3;
  • Figure 12 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 11;
  • Figure 13 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 11;
  • Figure 14 is a phase band distribution diagram when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 4;
  • Figure 15 is a schematic winding diagram of the first parallel branch of the U-phase winding in the flat wire motor shown in Figure 14;
  • Figure 16 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 14;
  • Figure 17 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 14;
  • Figure 18 is a schematic winding diagram of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 4;
  • Figure 19 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 18;
  • Figure 20 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 18;
  • Figure 21 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 2;
  • Figure 22 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 21;
  • Figure 23 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 21;
  • Figure 24 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 2;
  • Figure 25 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 24;
  • Figure 26 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 24;
  • Figure 27 is a schematic diagram of the winding of the U-phase winding when the number of stator slots provided by this application is 48 and the number of slot layers is 7;
  • Figure 28 is a schematic connection diagram of two parallel branches of the U-phase winding in the embodiment of Figure 27;.
  • first”, “second” and “third” in the embodiments of this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as “first”, “second”, and “third” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
  • the terms “including” and “having” and any variations thereof are intended to cover non-exclusive inclusion.
  • a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to such processes, methods, products or devices.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • Stator refers to the stationary part of the motor, its function is to generate a rotating magnetic field.
  • Rotor refers to the rotating component in the motor, which is used to convert electrical energy into mechanical energy.
  • Pitch refers to the distance spanned by two elements of the same element in the motor winding on the armature surface. It is usually expressed by the number of stator slots opened on the stator core.
  • Figure 1 is a schematic structural diagram of an embodiment of the stator of a flat wire motor provided by the present application.
  • Figure 2 is a schematic structural diagram of the stator core in the stator shown in Figure 1.
  • Embodiments of the present application provide a flat wire motor.
  • the flat wire motor includes a rotor and a stator.
  • the rotor is located in a space surrounded by the inner wall of the stator core of the stator.
  • the number of pole pairs of the rotor is p, and the number of poles of the rotor is p. is 2p
  • the stator includes m-phase windings
  • q can be 2, etc.
  • the slot-pole matching of the flat wire motor can be 6 poles, 54 slots or 8 Pole 72 slot, etc., this application does not impose specific restrictions on this.
  • the stator of the flat wire motor includes a stator core 10 and a stator winding 20 .
  • the inner wall of the stator core 10 is provided with a plurality of stator slots 11 evenly distributed along its circumferential direction.
  • the number of stator slots 11 is a multiple of 3.
  • the number of stator slots 11 can be 48, 54, or 72, and any stator slot 11 extends in the axial direction of the stator core 10 and penetrates the inner wall of the stator core 10 along the axial direction of the stator core 10.
  • the stator slot 11 is also divided into n along the radial direction of the stator core 10.
  • Each slot layer of the stator slot 11 is provided with a flat wire conductor.
  • the stator winding 20 includes three-phase windings arranged periodically along the circumferential direction of the stator core 10 .
  • the three-phase windings are U-phase windings, V-phase windings and W-phase windings.
  • Each phase winding includes a plurality of parallel branches, and the multiple parallel branches are rotationally symmetrical in the circumferential direction; for example, each phase winding includes two parallel branches, and the two parallel branches are in the circumferential direction of the stator core 10 rotational symmetry.
  • the magnetic field distribution of the multiple parallel branches in each phase winding is the same and the electric potential is balanced, thereby avoiding the circulation current generated between the parallel branches, thereby greatly improving the efficiency of the parallel branches. It reduces the additional AC copper loss at high frequency, improves the efficiency of the flat wire motor during high-speed operation, avoids local overtemperature of the winding, and extends the life of the flat wire motor.
  • the stator is composed of three-phase windings with a phase difference of 120 electrical degrees and a stator core 10.
  • the structure of the stator winding 20 is in the stator core 10.
  • Each phase winding includes 2 parallel branches, and 2 The parallel branches use the central axis of the stator core 10 as the rotation axis, and the two parallel branches in the same-phase winding are rotationally symmetrical.
  • the central axis may also refer to the rotor centerline of the rotor in the flat wire motor. Rotational symmetry can be when a parallel branch in the same-phase winding moves a certain number of stator slots and coincides with other parallel branches in the same-phase winding.
  • the parallel branches in each phase winding in the stator can be connected in star mode or delta mode.
  • each of the phase-wound The group includes 3 parallel branches.
  • Each parallel branch includes a plurality of hairpin coils 21 connected by connecting wires.
  • Each stator slot 11 is provided with n layers of flat wire conductors of the hairpin coils 21, n being an odd number.
  • the hairpin coil 21 is formed by a flat wire conductor with a rectangular cross-section, and is inserted into the stator slot 11 .
  • the plurality of hairpin coils 21 mentioned above refer to multiple types of hairpin coils 21 .
  • each hairpin coil 21 includes a first leg 211, a second leg 212, a connecting section 213, a first bending section 214 and a second bending section 215.
  • the first leg 211 and the second The legs 212 are arranged in parallel and inserted into the slot layers of different stator slots 11 respectively.
  • the connecting section 213 is connected to one end of the first leg 211 and the second leg 212.
  • the connecting section 213 can be U-shaped or V-shaped.
  • the first bending section 214 is connected to the other end of the first leg 211
  • the second bending section 215 is connected to the other end of the second leg 212
  • the first bending section 214 and the second bending section 215 are both connected to welding ends 216, the same
  • adjacent hairpin coils are connected to the welding terminals 216 for conduction through connecting wires.
  • the pitch of the hairpin coil 21 is the number of stator slots spanned by the first leg 211 and the second leg 212 .
  • the first leg 211 and the second leg 212 are generally disposed in the stator slot 11
  • the connecting section 213 is located outside the stator slot 11 and is disposed on one end surface of the stator core 10
  • the welding end 216 is located outside the stator slot 11 and is provided on the other end surface of the stator core 10 .
  • the hairpin coil 21 can be inserted into the stator slot 11 and then bent to form the first bending section 214 and the second bending section 215 , wherein the hairpin coil 21 is inserted into the stator slot 11 .
  • its connecting section 213 forms the insertion portion of the stator winding 20
  • the welding end 216 forms the welding portion of the stator winding 20 .
  • the first bending section 214 and the second bending section 215 of some of the hairpin coils 21 have parallel bending directions for reversing winding; as shown in Figure 3, the first bending sections of the remaining hairpin coils 21 have parallel bending directions.
  • the bending directions of the bending section 214 and the second bending section 215 are symmetrically arranged for in-phase winding.
  • n layers of hairpin coils 21 are provided in any stator slot 11, that is, each slot layer of the stator slot 11 is provided with a first leg 211 or a second leg 212 of a hairpin coil 21, and each parallel branch
  • the hairpin coil 21 traverses n slot layers in different stator slots 11, thereby eliminating potential phase differences caused by multiple parallel branches in each phase winding due to their positions in the stator slots.
  • the hairpin coils 21 in the same stator slot 11 are in the same phase, so there is no need for interphase insulating paper between the first legs 211 or the second legs 212 of different layers in the same stator slot 11 , which can reduce flatness. Insulation costs for line motors.
  • the hairpin coils 21 in each parallel branch of the same phase at least include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the first hairpin coil, the second hairpin coil At least any two of the coils and the third hairpin coil have different pitches.
  • the first legs and the second legs of two of the first hairpin coil, the second hairpin coil and the third hairpin coil are respectively located at the first two adjacent groove layers and the second adjacent two groove layers, wherein, The first two adjacent groove layers and the second adjacent two groove layers share a same groove layer.
  • This application uses the stator of the flat wire motor to limit the type of hairpin coils in each phase winding, so that the winding wiring of the stator in the flat wire motor can be realized with fewer types of hairpin coils, broadening the way of designing the windings of the flat wire motor, and reducing
  • the smaller manufacturing mold of the stator in the flat wire motor can reduce the production cost, simplify the manufacturing process, effectively improve the processing and manufacturing efficiency, and avoid circulating current during normal operation of the flat wire motor, reducing the motor copper loss and improving improve motor efficiency.
  • the pitch of the first hairpin coil of the hairpin coil 21 in each parallel branch of the same phase is s/(2p)+a
  • the pitch of the second hairpin coil is s/(2p)
  • the pitch of the third hairpin coil is s/(2p)+a-4, where a is an integer greater than or equal to 2 and less than or equal to 4.
  • the first leg 211 and the second leg 212 of the third hairpin coil are respectively located at the kth slot layer and the k+1th slot layer.
  • the first leg 211 and the second leg of the first hairpin coil 212 are respectively located in the k+1th slot layer and the k+2th slot layer.
  • the first leg 211 and the second leg 212 of the second hairpin coil are both distributed in the 1st slot layer or the nth slot layer; where k is greater than or equal to 1 and is an odd number less than or equal to n.
  • the first hairpin coil is also called a long-distance hairpin coil
  • the second hairpin coil is also called a full-distance hairpin coil
  • the third hairpin coil is also called a short-distance hairpin coil.
  • the hairpin coils 21 in each parallel branch of the same phase in Embodiment 1 only include the first hairpin coil, the second hairpin coil and the third hairpin coil.
  • the voltage leads of the b parallel branches of each phase winding are in s stator slots and in the same slot layer or adjacent slot layers of different stator slots.
  • the neutral point leads of the b parallel branches of each phase winding are in In s stator slots and In the same slot layer or adjacent slot layers of different stator slots to simplify the winding structure.
  • All lead wires and neutral points of the three-phase windings are concentrated in the same slot layer or adjacent slot layers of different stator slots 11.
  • the axial direction of the winding can be reduced. and radial space to reduce the manufacturing difficulty of flat wire motors.
  • the voltage leads of the b parallel branches in the same phase winding are also rotationally symmetrical in the circumferential direction of the stator core 10.
  • the same phase windings The neutral point lead wires of the b parallel branches are also rotationally symmetrical around the circumference of the stator core 10. Further, the voltage lead wires and the neutral point lead wires are in the same slot layer, for example, the voltage lead wires and the neutral point lead wires are The point lead-out lines are all located on the 1st slot layer or the nth slot layer.
  • the voltage leads and neutral points of the b parallel branches are rotationally symmetrical along the circumferential direction of the stator core 10, which can avoid the generation of circulating currents.
  • the welding pitch between the hairpin coils 21 in each parallel branch can be s/(2p), that is, the welding pitch between the hairpin coils 21 is the same as the first hairpin coil.
  • the pitch is the same.
  • the welding pitch between the hairpin coils 21 in the parallel branch may not be equal to the pitch of the first hairpin coil.
  • the pitch of the third hairpin coil is s/(2p)+3
  • the pitch of the first hairpin coil is s/(2p)
  • the pitch of the second hairpin coil is s/(2p)-1.
  • the hairpin coils of the three pitches exist simultaneously in each parallel branch, and the hairpin coils of each parallel branch traverse n slot layers in different stator slots 11, so that b parallel branches can eliminate the problem of slot layers. The potential phase difference caused by the difference in position.
  • the pitch of the second hairpin coil may be 11
  • the pitch of the first hairpin coil may be 12
  • the pitch of the third hairpin coil may be 15.
  • the hairpin coil used in the parallel branch between the 1st slot layer and the 2nd slot layer is the second hairpin coil
  • the parallel branch is between the 2nd slot layer and the 3rd slot layer.
  • the hairpin coil used between the 3rd slot layer and the 4th slot layer is the second hairpin coil
  • the parallel branch is in the 4th slot.
  • the hairpin coil used between the first layer and the fifth slot layer is the third hairpin coil, which will not be described again.
  • the winding method of each phase winding can be wave winding or stack winding.
  • Figure 5 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots and the number of slot layers is 4 and a is 3.
  • Figure 6 is as follows U in the flat wire motor shown in Figure 5
  • Figure 7 is the winding schematic diagram of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 5.
  • the solid line represents the wiring method of the plug-in terminal
  • the dotted line represents the wiring method of the welding terminal.
  • U1, U2, and U3 can be used as voltage lead wires or neutral point lead wires.
  • X1, X2, and X3 can be used as voltage lead wires or as neutral point lead wires. Neutral point lead-out.
  • n 4
  • the pitch of the third hairpin coil is 15, the pitch of the first hairpin coil is 12, the pitch of the second hairpin coil is 11, the welding pitch between adjacent hairpin coils in the parallel branch is 12, then the parallel branch
  • the hairpin coil used in the parallel branch between the 1st slot layer and the 2nd slot layer is the second hairpin coil, and the hairpin coil used in the parallel branch between the 2nd slot layer and the 3rd slot layer is the third hairpin coil.
  • the hairpin coil used in the parallel branch between the 3rd slot layer and the 4th slot layer is the second hairpin coil.
  • the first hairpin coil appears in the same slot layer, and it only appears in the 1st slot layer or the 4th slot layer. Therefore, only five types of hairpin coils 21 are needed to use the stator winding 20 of this embodiment.
  • the stator winding 20 of this embodiment has a three-phase winding structure with a phase difference of 120 electrical degrees.
  • the number i(j) represents the j-th groove layer in the i-th groove.
  • 1(1) represents the first groove layer of the first groove
  • 7(2) represents the second groove layer of the seventh groove.
  • the first parallel branch of the U-phase winding winds from the voltage lead-out position U1 to the neutral point lead-out position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4) ⁇ 59(3) ⁇ 48(4 ) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2) ⁇ 12(1) ⁇ 1(2 ) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71(1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4) ⁇ 37(3) ⁇ 22(2 ) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 48(2) ⁇ 36(1) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2) ⁇ 48(1 ) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead position U3 to the neutral point.
  • the lead wire comes out at position ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 1(4) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2) ⁇ 37(1) ⁇ 49(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the U-phase winding, V-phase winding and W-phase winding are symmetrically and evenly distributed on the circumference of the stator core 10.
  • the V-phase winding and W-phase winding can be rotated along the circumferential direction of the stator core 10 by the U-phase winding.
  • a plurality of stator slots 11 are obtained, and the winding method of the V-phase winding and the W-phase winding will not be described again here.
  • the hairpin coil used in the parallel branch between the 3rd slot layer and the 4th slot layer is the second hairpin coil
  • the hairpin coil used in the parallel branch between the 4th slot layer and the 5th slot layer is the third hairpin coil.
  • Coil, the hairpin coil used in the parallel branch between the 5th slot layer and the 6th slot layer is the second hairpin coil.
  • the first hairpin coil appears in the same slot layer, and it only appears in the 1st slot layer or the 6th slot. Therefore, only seven types of hairpin coils 21 are needed to use the stator winding 20 of this embodiment.
  • the stator winding 20 of this embodiment is composed of a three-phase winding structure with a phase difference of 120 electrical degrees.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 49(5) ⁇ 61(6) ⁇ 72(5) ⁇ 12(6) ⁇ 23(5 ) ⁇ 35(6) ⁇ 46(5) ⁇ 58(6) ⁇ 46(6) ⁇ 34(5) ⁇ 23(6) ⁇ 11(5) ⁇ 72(6) ⁇ 60(5) ⁇ 49(6 ) ⁇ 37(5) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4) ⁇ 59(3) ⁇ 48(4) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2 ) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2) ⁇ 12(1) ⁇ 1(2) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71(1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 1(5) ⁇ 13(6) ⁇ 24(5) ⁇ 36(6) ⁇ 47(5) ⁇ 59(6) ⁇ 70(5) ⁇ 10(6) ⁇ 70(6 ) ⁇ 58(5) ⁇ 47(6) ⁇ 35(5) ⁇ 24(6) ⁇ 12(5) ⁇ 1(6) ⁇ 61(5) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4 ) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4) ⁇ 37(3) ⁇ 22(2) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 36(1 ) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2) ⁇ 48(1) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: (1) ⁇ 12(2) ⁇ 23(1) ⁇ 35(2) ⁇ 46(1) ⁇ 58(2) ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 25(5) ⁇ 37(6) ⁇ 48(5) ⁇ 60(6) ⁇ 71(5) ⁇ 11(6) ⁇ 22(5) ⁇ 34(6) ⁇ 22(6) ⁇ 10(5) ⁇ 71(6) ⁇ 59(5) ⁇ 48(6) ⁇ 36(5) ⁇ 25(6) ⁇ 13(5) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 1(4) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2) ⁇ 37(1) ⁇ 49(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 49(5) ⁇ 61(6) ⁇ 72(5) ⁇ 12(6) ⁇ 23(5 ) ⁇ 35(6) ⁇ 46(5) ⁇ 58(6) ⁇ 1(7) ⁇ 13(8) ⁇ 24(7) ⁇ 36(8) ⁇ 47(7) ⁇ 59(8) ⁇ 70(7 ) ⁇ 10(8) ⁇ 70(8) ⁇ 58(7) ⁇ 47(8) ⁇ 35(7) ⁇ 24(8) ⁇ 12(7) ⁇ 1(8) ⁇ 61(7) ⁇ 46(6 ) ⁇ 34(5) ⁇ 23(6) ⁇ 11(5) ⁇ 72(6) ⁇ 60(5) ⁇ 49(6) ⁇ 37(5) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4) ⁇ 59(3) ⁇ 48(4) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2) ⁇ 12(1) ⁇ 1(2)
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71 (1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 1(5) ⁇ 13(6) ⁇ 24(5) ⁇ 36(6) ⁇ 47(5) ⁇ 59(6) ⁇ 70(5) ⁇ 10(6) ⁇ 25(7 ) ⁇ 37(8) ⁇ 48(7) ⁇ 60(8) ⁇ 71(7) ⁇ 11(8) ⁇ 22(7) ⁇ 34(8) ⁇ 22(8) ⁇ 10(7) ⁇ 71(8 ) ⁇ 59(7) ⁇ 48(8) ⁇ 36(7) ⁇ 25(8) ⁇ 13(7) ⁇ 70(6) ⁇ 58(5) ⁇ 47(6) ⁇ 35(5) ⁇ 24(6 ) ⁇ 12(5) ⁇ 1(6) ⁇ 61(5) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4 ) ⁇ 37(3) ⁇ 22(2) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 36(1) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2 ) ⁇ 48(1)
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 12(2) ⁇ 23(1) ⁇ 35(2) ⁇ 46(1) ⁇ 58(2) ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3 ) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 25(5) ⁇ 37(6) ⁇ 48(5) ⁇ 60(6) ⁇ 71(5) ⁇ 11(6) ⁇ 22(5 ) ⁇ 34(6) ⁇ 49(7) ⁇ 61(8) ⁇ 72(7) ⁇ 12(8) ⁇ 23(7) ⁇ 35(8) ⁇ 46(7) ⁇ 58(8) ⁇ 46(8 ) ⁇ 34(7) ⁇ 23(8) ⁇ 11(7) ⁇ 72(8) ⁇ 60(7) ⁇ 49(8) ⁇ 37(7) ⁇ 22(6) ⁇ 10(5) ⁇ 71(6 ) ⁇ 59(5) ⁇ 48(6) ⁇ 36(5) ⁇ 25(6) ⁇ 13(5) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4 ) ⁇ 12(3) ⁇ 1(4) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2 ) ⁇ 37(1) ⁇
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the pitch of the third hairpin coil is s/(2p)+4
  • the pitch of the first hairpin coil is s/(2p)
  • the pitch of the second hairpin coil is s/(2p)+4.
  • the distance is also s/(2p), that is, the second hairpin coil also serves as the first hairpin coil
  • the first leg 211 and the second leg 212 of the second hairpin coil (first hairpin coil) are respectively located at the kth slot layer and The k+1th slot layer.
  • the number of stator slots s 6pq
  • the number of slot layers n in stator slot 11 is an even number
  • the polarity distribution of each odd-numbered layer is the same
  • the polarity distribution of each even-numbered layer is the same and is shifted by one stator slot relative to the polarity distribution of the odd-numbered layer.
  • the hairpin coils of the parallel branches in each phase winding traverse n slot layers in different stator slots 11, and the winding mode of the windings can be wave winding or overlapping winding; a certain parallel branch in the same-phase winding moves a certain amount After the number of stator slots 11, it overlaps with other parallel branches in the winding.
  • the types of hairpin coils that need to be used are greatly reduced, the number of molds that need to be manufactured is reduced, the cost is reduced, and the processing and manufacturing efficiency is improved.
  • the adjacent q slot positions of the same polarity of the parallel branches in the same-phase winding are shifted by 1 slot toward the adjacent pole, so that the equivalent pitch of one phase is smaller than the full pitch pitch. distance to achieve a short distance effect, thereby reducing the back electromotive force harmonics of the flat wire motor, improving the efficiency of the flat wire motor and optimizing the vehicle's NVH (noise, vibration and acoustic harshness).
  • NVH noise, vibration and acoustic harshness
  • the number of slot layers n of the stator slots 11 can be even numbers such as 2, 4, 6, 8, 10, etc.
  • Each phase winding includes 3 parallel branches, and the hairpin coil 21 in each parallel branch
  • the pitch combination is 12 and 16, that is, the pitch of the third hairpin coil is 16, the pitch of the first hairpin coil is 12, and the welding pitch between hairpin coils in each parallel branch is 11.
  • the first winding method is used, and only 5 types of hairpin coils are needed in the stator winding 20.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48(3 ) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4) ⁇ 59(3) ⁇ 47(4 ) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2) ⁇ 12(1) ⁇ 72(2 ) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71(1 ) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3 ) ⁇ 57(4) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1) ⁇ 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3 ) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4 ) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) ⁇ 49(1 ) ⁇ 60(2).
  • This embodiment can also adopt the second winding method, and only four types of hairpin coils are needed in the stator winding 20 .
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 25(1), and X2 corresponds to 13(1) ); U3 corresponds to 49(1), and X3 corresponds to 37(1). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • U1, U2 and U3 are rotationally symmetrical with respect to the stator core 10, and are all 24 stator slots 11 apart; X1, X2 and X3 are also rotationally symmetrical with respect to the stator core 10, and all differ by 24 stator slots 11.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the first parallel branch through which the series connection passes is: 1 (1) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48 (3) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4) ⁇ 59(3) ⁇ 47 (4) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2) ⁇ 12(1) ⁇ 72 (2) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2) ⁇ 71(1) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3) ⁇ 57(4) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 49(1) ⁇ 60(2) ⁇ 72(1) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) .
  • the first winding method is used in this application scenario. Seven hairpin coils are needed in the stator winding 20.
  • the starting slot and end slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1 (1), X1 corresponds to 61(1); U2 corresponds to 71(1), X2 corresponds to 59(2); U3 corresponds to 72(1), and X3 corresponds to 60(2).
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48(3 ) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 49(5) ⁇ 60(6) ⁇ 72(5) ⁇ 11(6) ⁇ 23(5 ) ⁇ 34(6) ⁇ 46(5) ⁇ 57(6) ⁇ 45(6) ⁇ 34(5) ⁇ 22(6) ⁇ 11(5) ⁇ 71(6) ⁇ 60(5) ⁇ 48(6 ) ⁇ 34(5) ⁇ 22(6) ⁇ 11(5) ⁇ 71(6) ⁇ 60(5) ⁇ 48(6) ⁇ 37(5) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4 ) ⁇ 59(3) ⁇ 47(4) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2 ) ⁇ 12(1) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71 (1 ) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3 ) ⁇ 57(4) ⁇ 1(5) ⁇ 12(6) ⁇ 24(5) ⁇ 35(6) ⁇ 47(5) ⁇ 58(6) ⁇ 70(5) ⁇ 9(6) ⁇ 69(6 ) ⁇ 58(5) ⁇ 46(6) ⁇ 35(5) ⁇ 23(6) ⁇ 12(5) ⁇ 72(6) ⁇ 61(5) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4 ) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2 ) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1) ⁇ 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3 ) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 25(5) ⁇ 36(6) ⁇ 48(5) ⁇ 59(6) ⁇ 71(5) ⁇ 10(6) ⁇ 22(5 ) ⁇ 33(6) ⁇ 21(6) ⁇ 10(5) ⁇ 70(6) ⁇ 59(5) ⁇ 47(6) ⁇ 36(5) ⁇ 24(6) ⁇ 13(5) ⁇ 69(4 ) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2 ) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) ⁇ 49(1) ⁇ 60(2).
  • the starting and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 Corresponds to 61(1); U2 corresponds to 25(1), X2 corresponds to 13(1); U3 corresponds to 49(1), and X3 corresponds to 37(1).
  • the slot number through which the first parallel branch is connected in series is the same as above and will not be described again.
  • the slot number through which the second parallel branch is connected in series is: 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2) ⁇ 71(1) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3) ⁇ 57(4) ⁇ 1(5) ⁇ 12(6) ⁇ 24(5) ⁇ 35(6) ⁇ 47(5) ⁇ 58(6) ⁇ 70(5) ⁇ 9(6) ⁇ 69(6) ⁇ 58(5) ⁇ 46(6) ⁇ 35(5) ⁇ 23(6) ⁇ 12(5) ⁇ 72(6) ⁇ 61(5) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1).
  • the slot number through which the third parallel branch is connected in series is: 49(1) ⁇ 60(2) ⁇ 72(1) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 25(5) ⁇ 36(6) ⁇ 48(5) ⁇ 59(6) ⁇ 71(5) ⁇ 10(6) ⁇ 22(5) ⁇ 33(6) ⁇ 21(6) ⁇ 10(35) ⁇ 70(6) ⁇ 59(5) ⁇ 47(6) ⁇ 36(5) ⁇ 24(6) ⁇ 13(5) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1).
  • a 2
  • the pitch of the third hairpin coil is s/(2p)+2
  • the pitch of the first hairpin coil is s/(2p)
  • the pitch of the second hairpin coil is s/(2p). is s/(2p)-2.
  • the number of stator slots s can be 72
  • the number of rotor pole pairs p is 3
  • the number of slot layers n of the stator slots 11 can be one of 4, 6, 8 and 10
  • the pitch of the third hairpin coil is 14.
  • the first hairpin coil The pitch is 12, and the pitch of the second hairpin coil is 10, that is, the pitch combination of the hairpin coils 21 in each parallel branch is 10, 12, and 14, and the welding pitch between the hairpin coils in each parallel branch is Both are 13.
  • the first winding method is used, and only 5 types of hairpin coils are needed in the stator winding 20.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 72(1 ) ⁇ 13(2) ⁇ 23(1) ⁇ 36(2) ⁇ 46(1) ⁇ 59(2) ⁇ 69(1) ⁇ 10(2) ⁇ 24(3) ⁇ 37(4) ⁇ 47(3 ) ⁇ 60(4) ⁇ 70(3) ⁇ 11(4) ⁇ 21(3) ⁇ 34(4) ⁇ 22(4) ⁇ 9(3) ⁇ 71(4) ⁇ 58(3) ⁇ 48(4 ) ⁇ 35(3) ⁇ 25(4) ⁇ 12(3) ⁇ 70(2) ⁇ 57(1) ⁇ 47(2) ⁇ 34(1) ⁇ 24(2) ⁇ 11(1) ⁇ 1(2 ) ⁇ 60(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 70 (1 ) ⁇ 11(2) ⁇ 21(1) ⁇ 34(2) ⁇ 48(3) ⁇ 61(4) ⁇ 71(3) ⁇ 12(4) ⁇ 22(3) ⁇ 35(4) ⁇ 45(3 ) ⁇ 58(4) ⁇ 46(4) ⁇ 33(3) ⁇ 23(4) ⁇ 10(3) ⁇ 72(4) ⁇ 59(3) ⁇ 49(4) ⁇ 36(3) ⁇ 22(2 ) ⁇ 9(1) ⁇ 71(2) ⁇ 58(1) ⁇ 48(2) ⁇ 35(1) ⁇ 25(2) ⁇ 12(1) ⁇ 24(1) ⁇ 37(2) ⁇ 47(1 ) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 71 (1 ) ⁇ 12(2) ⁇ 22(1) ⁇ 35(2) ⁇ 45(1) ⁇ 58(2) ⁇ 72(3) ⁇ 13(4) ⁇ 23(3) ⁇ 36(4) ⁇ 46(3 ) ⁇ 59(4) ⁇ 69(3) ⁇ 10(4) ⁇ 70(4) ⁇ 57(3) ⁇ 47(4) ⁇ 34(3) ⁇ 24(4) ⁇ 11(3) ⁇ 1(4 ) ⁇ 60(3) ⁇ 46(2) ⁇ 33(1) ⁇ 23(2) ⁇ 10(1) ⁇ 72(2) ⁇ 59(1) ⁇ 49(2) ⁇ 36(1) ⁇ 48(1 ) ⁇ 61(2).
  • the start slot and end slot numbers corresponding to the three parallel branches are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 70(1), X2 corresponds to 60(2); U3 corresponds to 71( 1), X3 corresponds to 61(2).
  • the second winding method if used, only four types of hairpin coils are needed in the stator winding 20 .
  • the difference from the first winding method lies in the starting slot and the ending slot of the parallel branch.
  • the start slot and end slot numbers corresponding to the three parallel branches are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 24(1), X2 corresponds to 12(1); U3 corresponds to 48(1), X3 corresponds to 36(1).
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 72 (1 ) ⁇ 13(2) ⁇ 23(1) ⁇ 36(2) ⁇ 46(1) ⁇ 59(2) ⁇ 69(1) ⁇ 10(2) ⁇ 24(3) ⁇ 37(4) ⁇ 47(3 ) ⁇ 60(4) ⁇ 70(3) ⁇ 11(4) ⁇ 21(3) ⁇ 34(4) ⁇ 48(5) ⁇ 61(6) ⁇ 71(5) ⁇ 12(6) ⁇ 22(5 ) ⁇ 35(6) ⁇ 45(5) ⁇ 58(6) ⁇ 46(6) ⁇ 33(5) ⁇ 23(6) ⁇ 10(5) ⁇ 72(6) ⁇ 59(5) ⁇ 49(6 ) ⁇ 36(5) ⁇ 22(4) ⁇ 9(3) ⁇ 71(4) ⁇ 58(3) ⁇ 48(4) ⁇ 35(3) ⁇ 25(4) ⁇ 12(3) ⁇ 70(2 ) ⁇ 57(1) ⁇ 47(2) ⁇ 34(1) ⁇ 24(2) ⁇ 11(1) ⁇ 1(2) ⁇ 60(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 70 (1 ) ⁇ 11(2) ⁇ 21(1) ⁇ 34(2) ⁇ 48(3) ⁇ 61(4) ⁇ 71(3) ⁇ 12(4) ⁇ 22(3) ⁇ 35(4) ⁇ 45(3 ) ⁇ 58(4) ⁇ 72(5) ⁇ 13(6) ⁇ 23(5) ⁇ 36(6) ⁇ 46(5) ⁇ 59(6) ⁇ 69(5) ⁇ 10(6) ⁇ 70(6 ) ⁇ 57(5) ⁇ 47(6) ⁇ 34(5) ⁇ 24(6) ⁇ 11(5) ⁇ 1(6) ⁇ 60(5) ⁇ 46(4) ⁇ 33(3) ⁇ 23(4 ) ⁇ 10(3) ⁇ 72(4) ⁇ 59(3) ⁇ 49(4) ⁇ 36(3) ⁇ 22(2) ⁇ 9(1) ⁇ 71(2) ⁇ 58(1) ⁇ 48(2 ) ⁇ 35(1) ⁇ 25(2) ⁇ 12(1) ⁇ 24(1) ⁇ 37(2) ⁇ 47(1) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 71(1 ) ⁇ 12(2) ⁇ 22(1) ⁇ 35(2) ⁇ 45(1) ⁇ 58(2) ⁇ 72(3) ⁇ 3(4) ⁇ 23(3) ⁇ 36(4) ⁇ 46(3 ) ⁇ 59(4) ⁇ 69(3) ⁇ 10(4) ⁇ 24(5) ⁇ 37(6) ⁇ 47(5) ⁇ 60(6) ⁇ 70(5) ⁇ 11(6) ⁇ 21(5 ) ⁇ 34(6) ⁇ 22(6) ⁇ 9(5) ⁇ 71(6) ⁇ 58(5) ⁇ 48(6) ⁇ 35(5) ⁇ 25(6) ⁇ 12(5) ⁇ 70(4 ) ⁇ 57(3) ⁇ 47(4) ⁇ 34(3) ⁇ 24(4) ⁇ 11(3) ⁇ 1(4) ⁇ 60(3) ⁇ 46(2) ⁇ 33(1) ⁇ 23(2 ) ⁇ 10(1) ⁇ 72(2) ⁇ 59(1) ⁇ 49(2) ⁇ 36(1) ⁇ 48(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 70(1), and X2 corresponds to 60(2); U3 corresponds to 71(1), and X3 corresponds to 61(2).
  • the peak value of the 6-pole 72-slot flat wire motor is Comparing the back electromotive force harmonic content at the torque operating point, the back electromotive force harmonic content of the existing full-pitch winding motor is 4.75%, and the back electromotive force harmonic content using the embodiment of the present application is 3.98%, which is lower than 16.2%, it can be seen that the winding method provided by this application can reduce the back electromotive force harmonics and improve the motor efficiency.
  • the pitch of the first hairpin coil of the hairpin coil 21 in each parallel branch of the same phase is s/(2p), and the first leg and the second leg of the first hairpin coil are respectively located at the 2tth -1 slot layer and 2t slot layer, where p is the number of pole pairs of the flat wire motor, t ⁇ (n-1)/2.
  • the pitch of the second hairpin coil is s/(2p)-1, and the first leg 211 and the second leg 212 of the second hairpin coil are respectively located at the 2t slot layer and the 2t+1 slot layer.
  • the pitch of the third hairpin coil is s/(2p)+1, and the first leg 211 and the second leg 212 of the third hairpin coil are respectively located at the 2t slot layer and the 2t+1 slot layer.
  • each phase winding further includes a fourth hairpin coil and a fifth hairpin coil, wherein the fourth hairpin coil and the fifth hairpin coil are located on different parallel branches in the corresponding phase winding;
  • the pitch of the fourth hairpin coil is s/(2p)-1, and the first leg 211 and the second leg 212 of the fourth hairpin coil are both located on the nth slot layer;
  • the pitch of the fifth hairpin coil is s/( 2p)+1, the first leg 211 and the second leg 212 of the fifth hairpin coil are also located at the nth slot layer.
  • each phase winding includes two parallel branches
  • the first parallel branch of the same-phase winding can include a first hairpin coil, a second hairpin coil, a third hairpin coil, and a fifth hairpin coil.
  • the second parallel branch of the coil may include a first hairpin coil, a second hairpin coil, a third hairpin coil and a fourth hairpin coil.
  • the pitch of the first hairpin coil is s stator slots.
  • the first leg 211 and the second leg 212 of the first hairpin coil are located at the 2t-1 slot layer and the 2t slot layer respectively, where the pitch is s/2p, p is the number of pole pairs of the flat wire motor, t ⁇ (n-1)/2, s and t are both positive integers; there are 2p-2 first hairpin coils distributed in the same slot layer number, distributed in the same slot layer number
  • the first hairpin coils are welded and connected with each other by the welding ends of the first hairpin coils.
  • the pitch of the second hairpin coil is s-1 stator slots.
  • the first leg and the second leg of the second hairpin coil are located at the 2t slot layer and the 2t+1 slot layer respectively;
  • the pitch of the third hairpin coil is s +1 stator slot, the first leg and the second leg of the third hairpin coil are located at the 2t slot layer and 2t+1 slot layer respectively;
  • the pitch of the fourth hairpin coil is s-1 stator slot, the fourth hairpin coil
  • the two straight-line segments of the coil are both located at the n-th slot layer;
  • the pitch of the fifth hairpin coil is s+1 stator slots, and the two straight-line segments of the fifth hairpin coil are both located at the n-th slot layer.
  • the pitch of the first hairpin coil is 6 stator slots 11, then the pitch of the second hairpin coil is 5 stator slots 11, the pitch of the third hairpin coil is 7 stator slots 11, and the pitch of the fourth hairpin coil is 7 stator slots 11.
  • the pitch is 5 stator slots 11, and the pitch of the fifth hairpin coil is 7 stator slots 11.
  • the number of stator slots 11 in the stator core 10 is 48, and the number n of slot layers in each stator slot 11 is 7.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 2.
  • Figure 27 is a schematic diagram of the winding of the U-phase winding when the number of stator slots provided by this application is 48 and the number of slot layers is 7.
  • Figure 28 is a parallel connection of two U-phase windings in the embodiment of Figure 27 Branch circuit connection diagram. Among them, the solid line represents the wiring method of the plug-in terminal, and the dotted line represents the wiring method of the welding terminal.
  • U1 and U2 can be used as voltage lead wires or neutral point lead wires.
  • X1 and X2 can be used as voltage lead wires or neutral point lead wires. Wire.
  • the first parallel branch, the second parallel branch and the third parallel branch in the U-phase winding in this embodiment will be described in detail below with reference to FIGS. 27 and 28 .
  • the number i(j) represents the j-th slot layer in the i-th slot.
  • 1(1) represents the 1st slot layer of the 1st slot
  • 7(2) represents the 7th slot. 2nd slot level.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 7(2) ⁇ 13(1) ⁇ 19(2) ⁇ 25(1) ⁇ 31 (2) ⁇ 37(1) ⁇ 43(2) ⁇ 2(3) ⁇ 8(4) ⁇ 14(3) ⁇ 20(4) ⁇ 26(3) ⁇ 32(4) ⁇ 38(3) ⁇ 44 (4) ⁇ 1(5) ⁇ 7(6) ⁇ 13(5) ⁇ 19(6) ⁇ 25(5) ⁇ 31(6) ⁇ 37(5) ⁇ 43(6) ⁇ 2(7) ⁇ 7 (7) ⁇ 14(7) ⁇ 19(7) ⁇ 26(7) ⁇ 31(7) ⁇ 38(7) ⁇ 43(7) ⁇ 38(6) ⁇ 32(5) ⁇ 26(6) ⁇ 20 (5) ⁇ 14(6) ⁇ 8(5) ⁇ 1(4) ⁇ 43(3) ⁇ 37(4) ⁇ 31(3) ⁇ 25(4) ⁇ 19(3) ⁇ 13(4) ⁇ 7 (3) ⁇ 2(2) ⁇ 44(1) ⁇ 38(2) ⁇ 32(1) ⁇ 26(2) ⁇ 20(1) ⁇ 14(2) ⁇ 8(1).
  • numbers 44(4) to 1(5), 7(3) to 2(2), 43(7) to 38(6) are the second hairpin coils, and numbers 43(7) to 38(6)
  • the bending directions of the first bending section 214 and the second bending section 215 of the hairpin coil are parallel, and the parallel branch starts to be reversed and wound through the hairpin coil.
  • Numbers 43(2) to 2(3), 43(6) to 2(7), and 8(5) to 1(4) are the third hairpin coils.
  • Numbers 7(7) to 14(7), 19(7) to 26(7), and 31(7) to 38(7) are the fifth hairpin coils.
  • the other hairpin coils in the parallel branch are all the first hairpin coils.
  • 1(1) is the number of the lead wire of the first parallel branch in the U-phase winding
  • 8(1) is the number of the neutral point of the first parallel branch in the U-phase winding.
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 8(2) ⁇ 14(1) ⁇ 20(2) ⁇ 26(1) ⁇ 32 (2) ⁇ 38(1) ⁇ 44(2) ⁇ 1(3) ⁇ 7(4) ⁇ 13(3) ⁇ 19(4) ⁇ 25(3) ⁇ 31(4) ⁇ 37(3) ⁇ 43 (4) ⁇ 2(5) ⁇ 8(6) ⁇ 14(5) ⁇ 20(6) ⁇ 26(5) ⁇ 32(6) ⁇ 38(5) ⁇ 44(6) ⁇ 1(7) ⁇ 8 (7) ⁇ 13(7) ⁇ 20(7) ⁇ 25(7) ⁇ 32(7) ⁇ 37(7) ⁇ 44(7) ⁇ 37(6) ⁇ 31(5) ⁇ 25(6) ⁇ 19 (5) ⁇ 13(6) ⁇ 7(5) ⁇ 2(4) ⁇ 44(3) ⁇ 38(4) ⁇ 32(3) ⁇ 26(4) ⁇ 20(3) ⁇ 14(4) ⁇ 8 (3) ⁇ 1(2) ⁇ 43(1) ⁇ 37(2) ⁇ 31(1) ⁇ 25(2) ⁇ 19(1) ⁇ 13(2) ⁇ 7(1).
  • numbers 44(2) to 1(3), 44(6) to 1(7), and 7(5) to 2(4) are the second hairpin coils.
  • Numbers 43(4) to 2(5), 8(3) to 1(2), 44(7) to 37(6) are the third hairpin coils, and numbers 44(7) to 37(6) are the hairpin coils.
  • the bending directions of the first bending section 214 and the second bending section 215 are parallel, and the parallel branch starts to be reversed and wound through the hairpin coil.
  • Numbers 8(7) to 13(7), 20(7) to 25(7), and 32(7) to 37(7) are the fourth hairpin coils.
  • the other hairpin coils 21 in the parallel branch are all the first hairpin coils.
  • 2(1) is the number of the lead wire of the second parallel branch in the U-phase winding
  • 7(1) is the number of the neutral point of the second parallel branch in the U-phase winding.
  • the U-phase winding, V-phase winding and W-phase winding are symmetrically and evenly distributed on the circumference of the stator core 10.
  • the V-phase winding and the W-phase winding can be rotated along the circumferential direction of the stator core 10 by the U-phase winding. Two or four stator slots 11 are obtained, and the winding methods of the V-phase winding and W-phase winding will not be described again here.
  • An embodiment of the present application also provides a power assembly, which includes a reducer and the above-mentioned flat wire motor.
  • the flat wire motor and the reducer are connected in transmission.
  • the drive shaft and reduction gear of the flat wire motor The input shaft of the reducer can be connected through transmission parts such as couplings to output the driving force from the flat wire motor to the reducer.
  • the vehicle provided by the embodiment of the present application includes the above-mentioned power assembly.
  • the above-mentioned power assembly is arranged in the vehicle and provides operating power for the vehicle.
  • the vehicle may be a new energy vehicle driven by electric energy.
  • new energy vehicles can specifically be hybrid electric vehicles, pure electric vehicles or fuel cell electric vehicles, etc., or they can be vehicles that use high-efficiency energy storage devices such as supercapacitors, flywheel batteries or flywheel energy storage devices as the source of electric energy.
  • this application discloses a stator, a flat wire motor, a power assembly and a vehicle.
  • the winding wiring of the stator in the flat wire motor can be realized with fewer types of hairpin coils, and the flat wire motor is widened.
  • the method of designing the windings of the flat wire motor reduces the manufacturing mold of the stator in the flat wire motor, thereby reducing the manufacturing cost and simplifying the manufacturing process, effectively improving the processing and manufacturing efficiency, and avoiding the occurrence of circulating current during normal operation of the flat wire motor. , reducing motor copper losses and improving motor efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

La présente invention concerne un stator, un moteur à fil plat, un ensemble d'alimentation et un véhicule. Le stator comprend un noyau de fer de stator, la paroi interne du noyau de fer de stator étant pourvue de s fentes de stator ; et un enroulement de stator comprenant trois phases d'enroulements, chaque phase d'enroulement comprenant b branches parallèles, et chaque branche parallèle comprenant une pluralité de bobines en épingle à cheveux connectées par un fil de connexion ; la pluralité de bobines en épingle à cheveux comprenant une troisième bobine en épingle à cheveux ayant un pas de s/(2p)+a, une première bobine en épingle à cheveux ayant un pas de s/(2p), et une deuxième bobine en épingle à cheveux ayant un pas de s/(2p)+a-4, et a étant un nombre entier supérieur ou égal à 2 et inférieur ou égal à 4 ; dans chaque branche parallèle, une première patte de support et une seconde patte de support de la seconde bobine en épingle à cheveux sont respectivement situées dans une kème couche de fentes et une (k+1)ème couche de fentes, une première patte de support et une seconde patte de support de la troisième bobine en épingle à cheveux sont respectivement situées dans la (k+1)ème couche de fentes et une (k+2)ème couche de fentes, et une première patte de support et une seconde patte de support de la première bobine en épingle à cheveux sont toutes deux situées sur une première couche de fentes ou sur une nème couche de fentes. De cette manière, selon le stator fourni par la présente invention, les coûts de fabrication de stators peuvent être réduits.
PCT/CN2023/091821 2022-07-06 2023-04-28 Stator, moteur à fil plat, ensemble d'alimentation et véhicule WO2024007709A1 (fr)

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Application Number Priority Date Filing Date Title
CN202210797757 2022-07-06
CN202210797757.2 2022-07-06
CN202210803290.8 2022-07-07
CN202210803290 2022-07-07
CN202210871751 2022-07-22
CN202210871751.5 2022-07-22
CN202210869167 2022-07-22
CN202210869167.6 2022-07-22
CN202211252008.8 2022-10-10
CN202211245122.8 2022-10-10
CN202211252008.8A CN115955032A (zh) 2022-07-06 2022-10-10 定子、扁线电机、动力总成和车辆
CN202211245122.8A CN115765253A (zh) 2022-07-07 2022-10-10 定子、扁线电机、动力总成和车辆

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Publication number Priority date Publication date Assignee Title
CN109586456A (zh) * 2017-09-29 2019-04-05 比亚迪股份有限公司 电机、定子组件及其线圈绕线方法
JP2021145522A (ja) * 2020-03-13 2021-09-24 株式会社明電舎 ステータ、回転機、及び分布巻ステータの製造方法
CN114337010A (zh) * 2021-12-31 2022-04-12 苏州汇川联合动力系统有限公司 一种定子组件和电机
CN114583863A (zh) * 2021-12-31 2022-06-03 华为数字能源技术有限公司 定子、扁线电机、动力总成和车辆
CN115765253A (zh) * 2022-07-07 2023-03-07 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN115955032A (zh) * 2022-07-06 2023-04-11 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109586456A (zh) * 2017-09-29 2019-04-05 比亚迪股份有限公司 电机、定子组件及其线圈绕线方法
JP2021145522A (ja) * 2020-03-13 2021-09-24 株式会社明電舎 ステータ、回転機、及び分布巻ステータの製造方法
CN114337010A (zh) * 2021-12-31 2022-04-12 苏州汇川联合动力系统有限公司 一种定子组件和电机
CN114583863A (zh) * 2021-12-31 2022-06-03 华为数字能源技术有限公司 定子、扁线电机、动力总成和车辆
CN115955032A (zh) * 2022-07-06 2023-04-11 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN115765253A (zh) * 2022-07-07 2023-03-07 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆

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