CN212381010U - Flat wire stator assembly and driving motor - Google Patents

Abstract

The utility model provides a flat wire stator component and a driving motor, wherein the flat wire stator component is applied to an M-phase motor with a rotor pole number of 2 p; the flat wire stator assembly comprises a stator core and M-phase stator windings, the stator core is provided with stator slots, and the M-phase stator windings are wound into six layers in the stator slots; each phase of the M-phase stator windings comprises a set of sub-windings, wherein a is a positive integer greater than 2 and is not a divisor of 2 p; each set of the sub-windings respectively comprises coils distributed on a first layer and a second layer, a third layer and a fourth layer, and a fifth layer and a sixth layer of the stator slot, and the number of the coils distributed on the first layer and the second layer, the third layer and the fourth layer, and the coils distributed on the fifth layer and the sixth layer of the stator slot is equal. The embodiment of the utility model provides a through the asymmetry that makes the inductance between each set of winding less, effectively reduced because the produced additional copper of winding circulation consumes.

Description

Flat wire stator assembly and driving motor

Technical Field

The embodiment of the utility model provides a relate to the motor field, more specifically say, relate to a flat wire stator subassembly and driving motor.

Background

Environmental pollution and energy crisis promote the vigorous development of the new energy automobile industry, especially the electric automobile industry. The performance of a vehicle driving motor, which is one of the key executing components of an electric vehicle, is critical to the performance of the whole vehicle. At present, the motor for the vehicle is developed towards the direction of high speed, light weight and high efficiency, and has higher requirements on the power density, the efficiency level and the heat dissipation capacity of the motor.

Compared with a round wire motor, the flat wire motor has the advantages of higher motor slot filling rate, shorter winding end part, higher power density and stronger heat dissipation capability, thereby being particularly suitable for the application requirements of miniaturization and light weight of the vehicle driving motor.

The flat wire motor has an inherent skin effect phenomenon, particularly a high-speed motor, the skin effect is serious, so that the number of conductor layers in a stator slot is increased for weakening the skin effect, and the thickness of the flat wire is reduced. Along with the increase of the number of layers of the flat wires and the increase of the winding connection mode, the unreasonable connection mode can bring unbalance of winding inductance, further winding circulation is generated, and the additional copper consumption of the winding is increased.

As shown in fig. 1 and 2, the schematic diagrams are a topological structure diagram of three-phase stator windings (for example, a U-phase stator winding, a V-phase stator winding, and a W-phase stator winding) in a conventional flat-wire motor, and a winding structure diagram of three sets of sub-windings (including a first set of sub-windings U1, a second set of sub-windings U2, and a third set of sub-windings U3) in each phase of stator winding on a stator core. Because of the limitation of the connection mode, the third set of sub-windings U3 in each phase of stator winding of the conventional flat wire motor is not provided with coils connected in series to the third layer and the fourth layer of the stator slot, so that the inductance between the three sets of sub-windings has large asymmetry, as shown in fig. 3, large winding circulation is generated, and additional copper loss is increased.

In addition, the third set of sub-winding U3 distributes in the first layer of stator slot and the coil on second floor, with distribute in the coil on fifth layer and sixth floor need stride the layer and be connected to need add the cross-over connection copper bar, greatly increased material cost like this, increased the equipment operation degree of difficulty simultaneously.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a there is great asymmetry, additional copper to consume the problem that increases and material cost is high, the equipment degree of difficulty is big to the inductance between the three sets of sub-winding in each phase stator winding of above-mentioned current flat wire motor, provides a flat wire stator subassembly and driving motor.

The embodiment of the present invention provides a flat wire stator assembly for an M-phase motor with a rotor pole number of 2 p; the flat wire stator assembly comprises a stator core and M-phase stator windings, wherein N stator slots which are axially arranged are formed in the inner periphery of the stator core, the M-phase stator windings are wound into six layers in the stator slots, and both N, p and M are positive integers; each phase of the M-phase stator windings comprises a sets of sub-windings connected in parallel, wherein a is a positive integer greater than 2 and is not a divisor of 2 p; each set of the sub-windings respectively comprises a first layer and a second layer distributed in the stator slot, coils distributed in a third layer and a fourth layer, and coils distributed in a fifth layer and a sixth layer, and the number of the coils distributed in the first layer and the second layer of the stator slot, the number of the coils distributed in the third layer and the fourth layer, and the number of the coils distributed in the fifth layer and the sixth layer of the stator slot are equal.

Preferably, each phase of the M-phase stator windings comprises three sets of sub-windings, each set of sub-windings comprises N coils connected in series, and N is equal to N/3.

Preferably, three sets of sub-windings of each phase of the stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding;

the first sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 3n/8 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the second sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 3n/8 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slot, n/4 coils distributed in the third and fourth layers of the stator slot, and 3n/8 coils distributed in the fifth and sixth layers of the stator slot.

Preferably, three sets of sub-windings of each phase of the stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding;

the first sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slot, 5n/16 coils distributed in the third and fourth layers of the stator slot, and 5n/16 coils distributed in the fifth and sixth layers of the stator slot; the second sub-winding comprises 3n/8 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises n/4 coils distributed in the first and second layers of the stator slots, 3n/8 coils distributed in the third and fourth layers of the stator slots, and 3n/8 coils distributed in the fifth and sixth layers of the stator slots.

Preferably, three sets of sub-windings of each phase of the stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding;

the first sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 3n/8 coils distributed in the fifth layer and the sixth layer of the stator slot; the second sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 3n/8 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slots, 3n/8 coils distributed in the third and fourth layers of the stator slots, and n/4 coils distributed in the fifth and sixth layers of the stator slots.

Preferably, M is 3, p is 4, N is 48;

the first sub-winding comprises a first coil group located in the first and second layers of the stator slot, a second coil group located in the third and fourth layers of the stator slot, and a third coil group located in the fifth and sixth layers of the stator slot;

the second sub-winding comprises a fourth coil group positioned in the first layer and the second layer of the stator slot, a fifth coil group positioned in the third layer and the fourth layer of the stator slot and a sixth coil group positioned in the fifth layer and the sixth layer of the stator slot, and the coils in the fifth coil group are not directly connected in series;

the third sub-winding comprises a seventh coil group positioned in the first layer and the second layer of the stator slot, an eighth coil group positioned in the third layer and the fourth layer of the stator slot and a ninth coil group positioned in the fifth layer and the sixth layer of the stator slot, and the coils in the eighth coil group are not directly connected in series.

Preferably, the first coil group comprises a first winding coil with a leading-in end positioned on the first layer of the stator slot, a second winding coil and a third winding coil, a fourth winding coil with a leading-in end positioned on the second layer of the stator slot and a fifth winding coil; the second coil group comprises a winding sixth coil, a winding seventh coil, a winding eighth coil, a winding ninth coil, a winding tenth coil and a winding eleventh coil, wherein the leading-in end of the winding sixth coil, the winding seventh coil and the winding eighth coil are positioned on the third layer of the stator slot; the third coil group comprises a winding twelfth coil and a winding thirteenth coil with leading-in ends positioned at the fifth layer of the stator slot, a winding fourteenth coil with leading-in ends positioned at the sixth layer of the stator slot, a winding fifteenth coil and a winding sixteenth coil;

a winding first coil, a winding sixth coil, a winding twelfth coil, a winding fourteenth coil, a winding ninth coil, a winding fourth coil, a winding fifteenth coil, a winding tenth coil, a winding sixteenth coil, a winding eleventh coil, a winding fifth coil, a winding second coil, a winding seventh coil, a winding thirteenth coil, a winding third coil and a winding eighth coil of the first sub-winding are respectively connected in series in sequence, and a phase voltage outgoing line of the first sub-winding is electrically connected to a leading-in end of the winding first coil positioned on the first layer of the stator slot, and a neutral line outgoing line of the first sub-winding is electrically connected to a leading-out end of the winding eighth coil positioned on the fourth layer of the stator slot;

the fourth coil group comprises a second winding first coil and a second winding second coil with leading-in ends positioned on the first layer of the stator slots, a second winding third coil, a second winding fourth coil and a second winding fifth coil with leading-in ends positioned on the second layer of the stator slots; the fifth coil group comprises a second winding sixth coil, a second winding seventh coil, a second winding eighth coil, a second winding ninth coil, a second winding tenth coil and a second winding eleventh coil, wherein the leading-in end of the second winding sixth coil, the second winding seventh coil and the second winding eighth coil are positioned on the third layer of the stator slot; the sixth coil group comprises a twelfth coil with a lead-in end positioned on the fifth layer of the stator slot, a thirteenth coil with a second winding, a fourteenth coil with a second winding, a fifteenth coil with a lead-in end positioned on the sixth layer of the stator slot and a sixteenth coil with a second winding;

and a second winding ninth coil, a second winding third coil, a second winding fifteenth coil, a second winding tenth coil, a second winding fourth coil, a second winding first coil, a second winding sixth coil, a second winding twelfth coil, a second winding seventh coil, a second winding thirteenth coil, a second winding second coil, a second winding eighth coil, a second winding fourteenth coil, a second winding sixteenth coil, a second winding eleventh coil and a second winding fifth coil of the second sub-winding are sequentially connected in series, respectively, and a phase voltage outgoing line of the second sub-winding is electrically connected to a leading-in end of the second winding ninth coil located on the fourth layer of the stator slot, and a neutral line outgoing line is electrically connected to a leading-out end of the second winding fifth coil located on the first layer of the stator slot.

Preferably, the seventh coil group comprises a three-winding first coil, a three-winding second coil and a three-winding third coil with leading-in ends positioned on the first layer of the stator slots, a three-winding fourth coil, a three-winding fifth coil and a three-winding sixth coil with leading-in ends positioned on the second layer of the stator slots; the eighth coil group comprises a third-winding seventh coil and a third-winding eighth coil with leading-in ends positioned on the third layer of the stator slot, and a third-winding ninth coil and a third-winding tenth coil with leading-in ends positioned on the fourth layer of the stator slot; the ninth coil group comprises a third-winding eleventh coil, a third-winding twelfth coil, a third-winding thirteenth coil, a third-winding fourteenth coil, a third-winding fifteenth coil and a third-winding sixteenth coil, wherein the leading-in end of the third-winding eleventh coil, the third-winding twelfth coil and the third-winding thirteenth coil are positioned at the fifth layer of the stator slot;

and a phase voltage outgoing line of the third sub-winding is electrically connected to a leading-in end of the fourteenth coil of the three-winding, and a neutral line outgoing line of the third sub-winding is electrically connected to a leading-out end of the sixth coil of the three-winding at the sixth layer of the stator slot.

Preferably, the seventh coil group comprises a three-winding first coil, a three-winding second coil and a three-winding third coil with leading-in ends positioned on the first layer of the stator slots, a three-winding fourth coil, a three-winding fifth coil and a three-winding sixth coil with leading-in ends positioned on the second layer of the stator slots; the eighth coil group comprises a third-winding seventh coil and a third-winding eighth coil with leading-in ends positioned on the third layer of the stator slot, and a third-winding ninth coil and a third-winding tenth coil with leading-in ends positioned on the fourth layer of the stator slot; the ninth coil group comprises a third-winding eleventh coil, a third-winding twelfth coil, a third-winding thirteenth coil, a third-winding fourteenth coil, a third-winding fifteenth coil and a third-winding sixteenth coil, wherein the leading-in end of the third-winding eleventh coil, the third-winding twelfth coil and the third-winding thirteenth coil are positioned at the fifth layer of the stator slot;

and a phase voltage outgoing line of the third sub-winding is electrically connected to a leading-in end of the first layer of the three-winding, and a neutral line outgoing line of the third sub-winding is electrically connected to a leading-out end of the thirteenth layer of the three-winding, which is located at the stator slot.

The embodiment of the utility model provides a still provide a driving motor, including rotor subassembly and as above arbitrary the flat wire stator subassembly.

The utility model discloses flat wire stator subassembly and driving motor have following beneficial effect: the coils of each set of sub-windings are respectively connected in series to the first layer and the second layer, the third layer and the fourth layer, and the fifth layer and the sixth layer of the stator slot, so that the asymmetry of the inductance among the sets of sub-windings of each phase of stator winding is smaller, the winding circulation of the M-phase stator winding is reduced, and the additional copper loss is reduced; because the number of the coils distributed on the first layer and the second layer, the third layer and the fourth layer and the fifth layer and the sixth layer of the stator winding of each phase is equal, that is, the number of coils distributed on the first layer and the second layer, the third layer and the fourth layer, and the fifth layer and the sixth layer of the stator slot of one set of sub-windings is equal to the number of coils distributed on the first layer and the second layer, the third layer and the fourth layer, and the fifth layer and the sixth layer of the stator slot of the other set of sub-windings, so that the connection mode of the M-phase stator winding can be effectively optimized, the coils of each set of sub-windings of each phase of stator winding can be connected in series to the first layer and the second layer, the third layer and the fourth layer, the fifth layer and the sixth layer of the stator slot, and the rationality of the connection mode of the M-phase stator winding is improved; because every set of sub-winding is including distributing in the first layer and the second floor of stator slot respectively, distributing in the third layer and fourth floor, and distributing in the coil on fifth layer and sixth floor, consequently the coil of same set of sub-winding need not to cross the layer and connects, need not to realize the connection with the help of the great copper bar of length during the equipment promptly, has not only reduced material cost, can also effectively reduce the assembly operation degree of difficulty for the packaging efficiency is more heightened.

Drawings

FIG. 1 is a schematic diagram of the topology of the three-phase stator windings in a flat wire stator assembly of a prior art flat wire motor;

fig. 2 is a schematic diagram of a winding structure of three sets of stator windings on a stator core in each phase of stator windings of a conventional flat wire motor;

FIG. 3 is a waveform of current in three sets of stator windings in each phase of a prior art flat wire motor;

fig. 4 is a schematic view of a topology structure of three-phase stator windings in a flat wire stator assembly provided by an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating the distribution of coils in each stator slot of a stator core in a flat wire stator assembly according to an embodiment of the present invention;

fig. 6 is a schematic view of a winding structure of a first sub-winding on a stator core in each phase of stator windings of a flat wire stator assembly provided by an embodiment of the present invention;

fig. 7 is a schematic view of a winding structure of a second sub-winding on a stator core in each phase of stator windings of a flat wire stator assembly provided by an embodiment of the present invention;

fig. 8 is a schematic view of a winding structure of a third sub-winding on a stator core in each phase of stator windings of a flat wire stator assembly provided by an embodiment of the present invention;

fig. 9 is a waveform diagram of currents in three sets of sub-windings in three-phase stator windings of a flat wire stator assembly provided by an embodiment of the present invention;

fig. 10 is a schematic view of a winding structure of a third sub-winding on a stator core in each phase of stator windings of a flat wire stator assembly according to another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a driving motor according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 4, it is the topological structure schematic diagram of three-phase stator winding in the flat wire stator assembly provided by the embodiment of the present invention, this flat wire stator assembly can be applied to the field of electric machine equipment, especially in the driving motor of new energy electric automobile.

As shown in fig. 5, the flat wire stator assembly in this embodiment is mainly applied to a three-phase motor with a rotor pole number of 2p (p is a positive integer). Specifically, the flat wire stator assembly includes a stator core having N (N is a positive integer) axially disposed stator slots 7 on an inner periphery thereof, and three-phase stator windings (e.g., a U-phase stator winding, a V-phase stator winding, and a W-phase stator winding). The three-phase stator winding may be formed by flat wires (the flat wires may specifically include conductors with rectangular cross sections and insulating layers wrapped outside the conductors), and the three-phase stator winding is wound into six layers in the stator slot 7, specifically including a first layer L1, a second layer L2, a third layer L3, a fourth layer L4, a fifth layer L5 and a sixth layer L6, which are sequentially arranged from outside to inside along the radial direction of the motor.

Preferably, each phase of stator winding of the three-phase stator winding includes a (a is a positive integer) sets of sub-windings connected in parallel, and a is not a divisor of 2p, that is, the number of parallel branches of each phase of stator winding is not a divisor of the number of poles of the rotor of the motor, so that the matching of low-speed torque and high-speed power of the motor can be effectively improved, and the motor is suitable for high-speed occasions without increasing the capacity of the inverter, thereby reducing the cost.

In particular, a is a positive integer greater than 2, and at least two sets of sub-windings of each phase of stator winding are respectively distributed in the first layer L1 and the second layer L2, the third layer L3 and the fourth layer L4, and the coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slot 7, which are equal in number, that is, one set of sub-windings of each phase of stator winding is distributed in the first layer L1 and the second layer L2 of the stator slot 7, distributed in the third layer L3 and the fourth layer L4, and distributed in the fifth layer L5 and the sixth layer L6, and the number of coils of the other set of sub-windings of the phase of stator winding is distributed in the first layer L1 and the second layer L2 of the stator slot 7, distributed in the third layer L3 and the fourth layer L4, and distributed in the fifth layer L5 and the sixth layer L6 is equal in number. The arrangement can effectively optimize the connection mode of the three-phase stator windings, so that the coils of each set of sub-windings of each phase of stator winding can be uniformly wound in the N stator slots 7, and the coils of each set of sub-windings of each phase of stator winding can be connected in series to the first layer L1, the second layer L2, the third layer L3, the fourth layer L4, the fifth layer L5 and the sixth layer L6 of the stator slots 7, thereby greatly improving the rationality of the connection mode of the three-phase stator windings.

Because the arrangement mode optimizes the connection mode of the three-phase stator windings, each set of sub-windings of each phase of stator windings can respectively comprise coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, the third layer L3 and the fourth layer L4 of the stator slots, and the fifth layer L5 and the sixth layer L6 of the stator slots. In practical application, the number of coils distributed in the first layer L1 and the second layer L2, the number of coils distributed in the third layer L3 and the fourth layer L4, and the number of coils distributed in the fifth layer L5 and the sixth layer L6 of each set of sub-windings in the stator slot 7 are preferably greater than or equal to 2, so that the number of coils distributed among the layers can be more uniform and reasonable, and the balance of coil distribution can be improved.

In the flat wire stator assembly, the coils of each set of sub-windings are respectively connected in series to the first layer L1, the second layer L2, the third layer L3, the fourth layer L4, the fifth layer L5 and the sixth layer L6 of the stator slot 7, so that the asymmetry of inductance among the sets of sub-windings of each phase of stator winding is small, namely, the back electromotive force, the resistance and the inductance of each parallel sub-winding of each phase of stator winding are approximately the same, the winding circulation of the three-phase stator winding is reduced, the additional copper loss is reduced, the motor efficiency is improved, and the temperature rise of the stator winding is reduced. Moreover, when the flat wire stator assembly is applied to an electric automobile, the NVH performance can be effectively improved, and the market competitiveness of the electric automobile is improved.

In addition, each set of sub-winding respectively comprises a first layer L1 and a second layer L2 distributed in the stator slot 7, a third layer L3 and a fourth layer L4, and coils distributed in a fifth layer L5 and a sixth layer L6, therefore, the coils of the same set of sub-winding do not need to be connected in a cross-layer mode, long-distance cross-over copper bars are not needed to be used for achieving series connection during assembly, material cost is controlled, assembly operation difficulty is effectively reduced, and assembly efficiency of the flat wire stator assembly can be improved.

In an embodiment of the present invention, each phase stator winding of the three-phase stator winding includes three sets of sub-windings, and each set of sub-windings includes n coils connected in series. Specifically, N is equal to N/3, and N is a positive integer.

In practical application, the coil of the three-phase stator winding can be a U-shaped hairpin copper bar, one foot of the U-shaped hairpin copper bar forms a lead-in end, and the other foot of the U-shaped hairpin copper bar forms a lead-out end. During assembly, two pins of the U-shaped hairpin copper bar are directly inserted into two adjacent layers of the stator slot 7 respectively, namely the first layer L1 and the second layer L2, the third layer L3 and the fourth layer L4, or the fifth layer L5 and the sixth layer L6, so that the coil is assembled, the assembly is convenient and fast, and the disassembly, assembly and maintenance are facilitated. Of course, the coils of the three-phase stator winding can also adopt I type (double-end welding) or continuous wave winding (no welding), and the coil can be determined according to actual conditions.

Example 1

The three sets of sub-windings of each phase of stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding, and the three-phase stator winding is wound in the following mode:

the first sub-windings of each phase stator winding comprise 5n/16 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 3n/8 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 5n/16 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The second sub-windings of each phase stator winding comprise 5n/16 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 3n/8 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 5n/16 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The third sub-winding of each phase stator winding comprises 3n/8 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, n/4 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 3n/8 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

Example 2

The three sets of sub-windings of each phase of stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding, and the three-phase stator winding is wound in the following mode:

the first sub-windings of each phase stator winding comprise 3n/8 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 5n/16 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 5n/16 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The second sub-windings of each phase stator winding comprise 3n/8 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 5n/16 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 5n/16 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The third sub-windings of each phase stator winding comprise n/4 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 3n/8 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 3n/8 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

Example 3

The three sets of sub-windings of each phase of stator winding respectively comprise a first sub-winding, a second sub-winding and a third sub-winding, and the three-phase stator winding is wound in the following mode:

the first sub-windings of each phase stator winding comprise 5n/16 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 5n/16 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 3n/8 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The second sub-windings of each phase stator winding comprise 5n/16 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 5n/16 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and 3n/8 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

The third sub-winding of each phase stator winding comprises 3n/8 coils distributed in the first layer L1 and the second layer L2 of the stator slots 7, 3n/8 coils distributed in the third layer L3 and the fourth layer L4 of the stator slots 7, and n/4 coils distributed in the fifth layer L5 and the sixth layer L6 of the stator slots 7.

In the first embodiment of the present invention, the flat wire stator assembly is applied to a three-phase motor having a rotor pole number of 8, i.e., p is 4. And, the inner periphery of stator core has 48 stator slots 7 that set up axially, and the three-phase stator winding is wound into 6 layers in these 48 stator slots 7.

As shown in fig. 6 to 8, which are detailed wiring diagrams of the first sub-winding U1, the second sub-winding U2, and the third sub-winding U3 in the U-phase winding of the above-mentioned flat-wire stator assembly, reference numerals 1, 2, 3 … …, 48 in the three drawings indicate the numbers of 48 stator slots 7 (i.e., slot No. 1, slot No. 2, slot No. 3, slot No. … …, and slot No. 48 of the stator slot 7), while the inverted V flag located on each layer indicates a coil, and one end connected to the inverted V dotted line indicates a current layer, and one end connected to the inverted V solid line indicates an adjacent layer, where the adjacent layer is the first layer L1 and the second layer L2, the third layer L3 and the fourth layer L4, the fifth layer L5 and the sixth layer L6, i.e., the adjacent layer of the first layer L1 is the second layer L2, the adjacent layer L2 is the third layer L1, the adjacent layer 3 is the fourth layer 4, the fourth layer L6384 is the third layer 6, the adjacent layer to the sixth layer L6 is the fifth layer L5.

Specifically, the first sub-winding U1 includes a first coil group U11, U12 located in the first layer L1 and the second layer L2 of the stator slot 7, a second coil group U13, U14 located in the third layer L3 and the fourth layer L4 of the stator slot 7, and a third coil group U15, U16 located in the fifth layer L5 and the sixth layer L6 of the stator slot 7, and the coils in the second coil group U13, U14 are not directly connected in series.

As shown in fig. 6, the first coil group U11 and U12 of the first sub-winding U1 includes a first winding coil 111, a second winding coil 112 and a third winding coil 113 having lead-ins at the first layer L1 of the stator slots 7, and a fourth winding coil 121 and a fifth winding coil 122 having lead-ins at the second layer L2 of the stator slots 7. The second coil group U13 and U14 include a winding sixth coil 131, a winding seventh coil 132 and a winding eighth coil 133 with the leading ends located in the third layer L3 of the stator slot 7, and a winding ninth coil 141, a winding tenth coil 142 and a winding eleventh coil 143 with the leading ends located in the fourth layer L4 of the stator slot 7. The third coil group U15, U16 includes a winding twelfth coil 151 and a winding thirteenth coil 152 whose lead-in ends are located at the fifth layer L5 of the stator slot 7, and a winding fourteenth coil 161, a winding fifteenth coil 162 and a winding sixteenth coil 163 whose lead-in ends are located at the sixth layer L6 of the stator slot 7.

In assembly, the first-winding first coil 111 is inserted into slot No. 1 of the first layer L1 and slot No. 7 of the second layer L2, the first-winding sixth coil 131 is inserted into slot No. 13 of the third layer L3 and slot No. 19 of the fourth layer L4, the first-winding twelfth coil 151 is inserted into slot No. 25 of the fifth layer L5 and slot No. 31 of the sixth layer L6, the first-winding fourteenth coil 161 is inserted into slot No. 38 of the sixth layer L6 and slot No. 32 of the fifth layer L5, the first-winding ninth coil 141 is inserted into slot No. 26 of the fourth layer L4 and slot No. 20 of the third layer L3, and the first-winding fourth coil 121 is inserted into slot No. 14 of the second layer L2 and slot No. 8 of the first layer L1. Then, a fifteenth coil 162 for one winding is inserted into the No. 2 slot of the sixth layer L6 and the No. 44 slot of the fifth layer L5, a tenth coil 142 for one winding is inserted into the No. 38 slot of the fourth layer L4 and the No. 32 slot of the third layer L3, a sixteenth coil 163 for one winding is inserted into the No. 26 slot of the sixth layer L6 and the No. 20 slot of the fifth layer L5, an eleventh coil 143 for one winding is inserted into the No. 14 slot of the fourth layer L4 and the No. 8 slot of the third layer L3, a fifth coil 122 for one winding is inserted into the No. 2 slot of the second layer L2 and the No. 44 slot of the first layer L1, a second coil 112 for one winding is inserted into the No. 37 slot of the first layer L1 and the No. 43 slot of the second layer L2, a seventh coil 132 for one winding is inserted into the No. 1 slot of the third layer L3 and the No. 7 slot of the fourth layer L38, a thirteenth coil 152 is inserted into the No. 2 slot of the third layer L5 and the No. 5819 slots of the third layer L3931, the eighth coil 133 of the first winding is inserted into the slot No. 37 of the third layer L3 and the slot No. 43 of the fourth layer L4.

Finally, a winding first coil 111, a winding sixth coil 131, a winding twelfth coil 151, a winding fourteenth coil 161, a winding ninth coil 141, a winding fourth coil 121, a winding fifteenth coil 162, a winding tenth coil 142, a winding sixteenth coil 163, a winding eleventh coil 143, a winding fifth coil 122, a winding second coil 112, a winding seventh coil 132, a winding thirteenth coil 152, a winding third coil 113, and a winding eighth coil 133 are respectively connected in series in sequence (either directly or through coil connection) in an electrically conductive manner, thereby completing the winding operation of the first sub-winding U1.

In addition, the phase voltage lead wire U1+ of the first sub-winding U1 is connected to the leading end of the first winding first coil 111 positioned at the first layer L1 of the stator slot 7, and the neutral lead wire U1-is connected to the leading end of the winding eighth coil 133 positioned at the fourth layer L4 of the stator slot 7.

Further, a winding first coil 111 is connected in series with a winding sixth coil 131 through a short-distance coil 401; a winding sixth coil 131 is connected in series with a winding twelfth coil 151 through a short-distance coil 402; a winding twelfth coil 151 is connected with a winding fourteenth coil 161 in series through a short-distance coil 403; a winding fourteenth coil 161 is connected with a winding ninth coil 141 in series through the short-distance coil 404; a winding ninth coil 141 is connected in series with a winding fourth coil 121 through the short-distance coil 405; the winding fourth coil 121 is connected with the winding fifteenth coil 162 in series through the long distance coil 406; a winding fifteenth coil 162 is connected in series with a winding tenth coil 142 through a short-distance coil 407; a winding tenth coil 142 is connected in series with a winding sixteenth coil 163 through the short-distance coil 408; a sixteenth winding 163 is connected in series with an eleventh winding 143 through the short-range coil 409; the eleventh winding 143 is connected in series with the fifth winding 122 through the short-distance coil 410; a winding fifth coil 122 is connected with a winding second coil 112 in series through the short-distance coil 411; the second coil 112 is connected in series with the seventh coil 132 through the short-distance coil 412; a winding seventh coil 132 is connected with a winding thirteenth coil 152 in series through a short-distance coil 413; a winding thirteenth coil 152 is connected in series with a winding third coil 113 through a short-range coil 414; a winding tertiary coil 113 passes through the short-range coil 415 and a winding eighth coil 133.

Of course, in practical applications, when the leading-out end of one of the two connected coils in the first sub-winding U1 of each phase stator winding and the leading-in end of the other coil are located at the same layer or adjacent layers, the two connected coils may also be connected by direct welding.

The second sub-winding U2 includes a fourth coil group U21, U22 located in the first layer L1 and the second layer L2 of the stator slot 7, a fifth coil group U23, U24 located in the third layer L3 and the fourth layer L4 of the stator slot 7, and a sixth coil group U25, U26 located in the fifth layer L5 and the sixth layer L6 of the stator slot 7, and the coils in the fifth coil group U23, U24 are not directly connected in series.

As shown in fig. 7, the fourth coil group U21 and U22 of the second sub-winding U2 includes the second-winding first coil 211 and the second-winding second coil 212 whose lead-in ends are located in the first layer L1 of the stator slot 7, and the second-winding third coil 221, the second-winding fourth coil 222, and the second-winding fifth coil 223 whose lead-in ends are located in the second layer L2 of the stator slot 7. The fifth coil group U23, U24 includes a second-winding sixth coil 231, a second-winding seventh coil 232, and a second-winding eighth coil 233 whose lead-in ends are located at the third layer L3 of the stator slot 7, and a second-winding ninth coil 241, a second-winding tenth coil 242, and a second-winding eleventh coil 243 whose lead-in ends are located at the fourth layer L4 of the stator slot 7. The sixth coil group U25, U26 includes a second-winding twelfth coil 251, a second-winding thirteenth coil 252, and a second-winding fourteenth coil 253 whose lead-in ends are located at the fifth layer L5 of the stator slot 7, and a second-winding fifteenth coil 261 and a second-winding sixteenth coil 262 whose lead-in ends are located at the sixth layer L6 of the stator slot 7.

In assembly, the second-winding ninth coil 241 is inserted into slot No. 1 of the fourth layer L4 and slot No. 43 of the third layer L3, and the second-winding third coil 221 is inserted into slot No. 37 of the second layer L2 and slot No. 31 of the first layer L1. Next, the fifteenth coil 261 for the second winding is inserted into slot No. 25 of sixth layer L6 and slot No. 19 of fifth layer L5, the tenth coil 242 for the second winding is inserted into slot No. 13 of fourth layer L4 and slot No. 7 of third layer L3, the fourth coil 222 for the second winding is inserted into slot No. 1 of second layer L2 and slot No. 43 of first layer L1, the first coil 211 for the second winding is inserted into slot No. 2 of first layer L1 and slot No. 8 of second layer L2, the sixth coil 231 for the second winding is inserted into slot No. 14 of third layer L3 and slot No. 20 of fourth layer L4, the twelfth coil 251 for the second winding is inserted into slot No. 26 of fifth layer L5 and slot No. 32 of sixth layer L6, the seventh coil 232 for the second winding is inserted into slot No. 38 of third layer L3 and slot No. 8244 of fourth layer L8244, and the seventh coil 232 for the seventh coil 232 is inserted into slot No. 2 of third layer L8536 and slot No. 8 of third layer L2. Next, the second-winding second coil 212 is inserted into the 14 th slot of the first layer L1 and the 20 th slot of the second layer L2, the second-winding eighth coil 233 is inserted into the 26 th slot of the third layer L3 and the 32 th slot of the fourth layer L4, the second-winding fourteenth coil 253 is inserted into the 38 th slot of the fifth layer L5 and the 44 th slot of the sixth layer L6, the second-winding sixteenth coil 262 is inserted into the 37 th slot of the sixth layer L6 and the 31 th slot of the fifth layer L5, the second-winding eleventh coil 243 is inserted into the 25 th slot of the fourth layer L4 and the 19 th slot of the third layer L3, and the second-winding fifth coil 223 is inserted into the 13 th slot of the second layer L2 and the 7 th slot of the first layer L1.

Finally, the second-winding ninth coil 241, the second-winding third coil 221, the second-winding fifteenth coil 261, the second-winding tenth coil 242, the second-winding fourth coil 222, the second-winding first coil 211, the second-winding sixth coil 231, the second-winding twelfth coil 251, the second-winding seventh coil 232, the second-winding thirteenth coil 252, the second-winding second coil 212, the second-winding eighth coil 233, the second-winding fourteenth coil 253, the second-winding sixteenth coil 262, the second-winding eleventh coil 243, and the second-winding fifth coil 223 are respectively connected in series in sequence in an electrically conductive manner (which can be directly connected or connected through coils), and the winding operation of the second sub-winding U2 is completed.

In addition, a phase voltage lead wire U2+ of the second sub-winding U2 is connected to a lead-in end of the ninth coil 241 of the second winding, which is positioned at the fourth layer L4 of the stator slot 7, and a neutral lead wire U2-is connected to a lead-out end of the fifth coil 223 of the second winding, which is positioned at the first layer L1 of the stator slot 7.

Further, the second-winding ninth coil 241 is connected in series with the second-winding third coil 221 through the short-distance coil 501; the second-winding third coil 221 is connected in series with the second-winding fifteenth coil 261 through the long-distance coil 502; the second-winding fifteenth coil 261 is connected in series with the second-winding tenth coil 242 through the short-distance coil 503; the second-winding tenth coil 242 is connected in series with the second-winding fourth coil 222 through the short-distance coil 504; the second winding fourth coil 222 is connected with the second winding first coil 211 in series through the short-distance coil 505; the second winding first coil 211 is connected with the second winding sixth coil 231 in series through the short-distance coil 506; the second winding sixth coil 231 is connected with the second winding twelfth coil 251 in series through the short distance coil 507; the second-winding twelfth coil 251 is connected with the second-winding seventh coil 232 in series through the short-distance coil 508; the second-winding seventh coil 232 is connected with the second-winding thirteenth coil 252 in series through the short-distance coil 509; the two-winding thirteenth coil 252 is connected in series with the two-winding second coil 212 through the long distance coil 510; the second winding second coil 212 is connected with the second winding eighth coil 233 in series through the short-distance coil 511; the two-winding eighth coil 233 is connected with the two-winding fourteenth coil 253 in series through the short-distance coil 512; the second winding fourteenth coil 253 is connected with the second winding sixteenth coil 262 in series through the short distance coil 513; the two-winding sixteenth coil 262 is connected in series with the two-winding eleventh coil 243 through the short-distance coil 514; the two-winding eleventh coil 243 is connected in series with the two-winding fifth coil 223 through the short-pitch coil 515.

Of course, in practical applications, when the leading-out end of one of the two connected coils in the second sub-winding U2 of each phase stator winding and the leading-in end of the other coil are located at the same layer or adjacent layers, the two connected coils may also be connected by direct welding.

The third sub-winding U3 includes a seventh coil group U31, U32 in the first layer L1 and the second layer L2 of the stator slot 7, an eighth coil group U33, U34 in the third layer L3 and the fourth layer L4 of the stator slot 7, and a ninth coil group U35, U36 in the fifth layer L5 and the sixth layer L6 of the stator slot 7, and the coils in the eighth coil group U33, U34 are not directly connected in series.

As shown in fig. 8, the seventh coil group U31 and U32 of the third sub-winding U3 includes a third-winding first coil 311, a third-winding second coil 312, and a third-winding third coil 313 whose lead-in ends are located in the first layer L1 of the stator slot 7, and a third-winding fourth coil 321, a third-winding fifth coil 322, and a third-winding sixth coil 323 whose lead-in ends are located in the second layer L2 of the stator slot 7. The eighth coil group U33, U34 includes a three-winding seventh coil 331 and a three-winding eighth coil 332 having lead-ins at the third layer L3 of the stator slot 7, and a three-winding ninth coil 341 and a three-winding tenth coil 342 having lead-ins at the fourth layer L4 of the stator slot 7. The ninth coil group U35, U36 includes a three-winding eleventh coil 351, a three-winding twelfth coil 352 and a three-winding thirteenth coil 353, which are introduced at the fifth layer L5 of the stator slot 7, and a three-winding fourteenth coil 361, a three-winding fifteenth coil 362 and a three-winding sixteenth coil 363, which are introduced at the sixth layer L6 of the stator slot 7.

In assembly, the third-winding fourteenth coil 361 is inserted into the groove No. 1 of the sixth layer L6 and the groove No. 43 of the fifth layer L5, the third-winding ninth coil 341 is inserted into the groove No. 37 of the fourth layer L4 and the groove No. 31 of the third layer L3, and the third-winding fourth coil 321 is inserted into the groove No. 25 of the second layer L2 and the groove No. 19 of the first layer L1. Then, the fifteenth coil 362 having the three windings is inserted into the No. 13 slot of the sixth layer L6 and the No. 7 slot of the fifth layer L5, and the eleventh coil 351 having the three windings is inserted into the No. 1 slot of the fifth layer L5 and the No. 7 slot of the sixth layer L6. Next, the third-winding first coil 311 is inserted into the No. 13 slot of the first layer L1 and the No. 19 slot of the second layer L2, the third-winding seventh coil 331 is inserted into the No. 25 slot of the third layer L3 and the No. 31 slot of the fourth layer L4, and the third-winding twelfth coil 352 is inserted into the No. 37 slot of the fifth layer L5 and the No. 43 slot of the sixth layer L6. Then, the third-winding second coil 312 is inserted into the 38 th slot of the first layer L1 and the 44 th slot of the second layer L2, the third-winding eighth coil 332 is inserted into the 2 nd slot of the third layer L3 and the 8 th slot of the fourth layer L4, the third-winding thirteenth coil 353 is inserted into the 14 th slot of the fifth layer L5 and the 20 th slot of the sixth layer L6, the third-winding third coil 313 is inserted into the 26 th slot of the first layer L1 and the 32 th slot of the second layer L2, and the third-winding fifth coil 322 is inserted into the 26 th slot of the second layer L2 and the 20 th slot of the first layer L1. Next, the sixteenth coil 363 for the third winding is inserted into the 14 th slot of the sixth layer L6 and the 8 th slot of the fifth layer L5, the tenth coil 342 for the third winding is inserted into the 2 nd slot of the fourth layer L4 and the 44 th slot of the third layer L3, and the sixth coil 323 for the third winding is inserted into the 38 th slot of the second layer L2 and the 32 th slot of the first layer L1.

Finally, a third winding fourteenth coil 361, a third winding ninth coil 341, a third winding fourth coil 321, a third winding fifteenth coil 362, a third winding eleventh coil 351, a third winding first coil 311, a third winding seventh coil 331, a third winding twelfth coil 352, a third winding second coil 312, a third winding eighth coil 332, a third winding thirteenth coil 353, a third winding third coil 313, a third winding fifth coil 322, a third winding sixteenth coil 363, a third winding tenth coil 342 and a third winding sixth coil 323 of the third sub-winding U3 are respectively connected in series in sequence in an electrically conductive manner (which can be directly connected or connected through coils), and the winding operation of the third sub-winding U3 is completed.

Furthermore, a phase voltage lead wire U3+ of the third sub-winding U3 is electrically connected to a lead-in end of the fourteenth coil 361 of the three-winding located at the sixth layer L6 of the stator slot 7, and a neutral wire lead wire U3-is electrically connected to a lead-out end of the sixth coil 323 of the three-winding located at the first layer L1 of the stator slot 7.

Further, the fourteenth coil 361 with three windings is connected with the ninth coil 341 with three windings in series through the short distance coil 601; the third winding ninth coil 341 is connected in series with the third winding fourth coil 321 through the short-distance coil 602; the third-winding fourth coil 321 is connected in series with the third-winding fifteenth coil 362 through the long-distance coil 603; the three-winding fifteenth coil 362 is connected in series with the three-winding eleventh coil 351 through the short-range coil 604; the three-winding eleventh coil 351 is connected with the three-winding first coil 311 in series through the long-distance coil 605; the three-winding first coil 311 is connected with the three-winding seventh coil 331 in series through the short-distance coil 606; the third winding seventh coil 331 is connected in series with the third winding twelfth coil 352 through the short-distance coil 607; the third winding twelfth coil 352 is connected in series with the third winding second coil 312 through the long-distance coil 608; the three-winding second coil 312 is connected in series with the three-winding eighth coil 332 through the short-distance coil 609; the three-winding eighth coil 332 is connected in series with the three-winding thirteenth coil 353 through the short-distance coil 610; the third winding thirteenth coil 353 is connected in series with the third winding third coil 313 through the short distance coil 611; the third winding 313 is connected in series with the fifth winding 322 through the short-distance coil 612; the third winding fifth coil 322 is connected with the third winding sixteenth coil 363 in series through the long distance coil 613; the sixteenth coil 363 with the three windings is connected with the tenth coil 342 with the short-distance coil 614 in series; the three-winding tenth coil 342 is connected in series with the three-winding sixth coil 323 through the short-pitch coil 615.

Of course, in practical applications, when the leading-out end of one of the two connected coils in the third sub-winding U3 of each phase stator winding and the leading-in end of the other coil are located at the same layer or adjacent layers, the two connected coils may also be connected by direct welding.

In the flat wire stator assembly, the eighth coil groups U33 and U34 are arranged on the third layer L3 and the fourth layer L4 through the third group of windings U3, and the coils in the eighth coil groups U33 and U34 are not directly connected in series, so that the number of the coils among the seventh coil groups U31 and U32, the eighth coil groups U33 and U34 and the ninth coil groups U35 and U36 is more average, and the inductance among the sets of sub-windings of each phase of stator winding has higher symmetry.

As shown in fig. 9, compared with the winding connection manner of the conventional flat wire motor (as shown in fig. 2 and 3), the currents of the parallel sub-windings of each phase of stator winding of the flat wire stator assembly are basically overlapped, so that the circulating current generated between the parallel sub-windings is greatly suppressed, the additional alternating current copper consumption under high frequency is greatly reduced, the motor efficiency in high-speed operation is improved, the local over-temperature of the winding is avoided, and the service life of the motor is prolonged.

As shown in fig. 10, in another embodiment of the present invention, the first sub-winding U1 of each phase stator winding is wound in the same manner as the first sub-winding U1 of fig. 4, and the second sub-winding U2 is wound in the same manner as the second sub-winding U2 of fig. 5. The third sub-winding U3 of each phase stator winding is wound as follows:

the seventh coil group U31, U32 includes a three-winding first coil 311, a three-winding second coil 312 and a three-winding third coil 313, which are lead-ins located at the first layer L1 of the stator slots 7, and a three-winding fourth coil 321, a three-winding fifth coil 322 and a three-winding sixth coil 323, which are lead-ins located at the second layer L2 of the stator slots 7. The eighth coil group U33, U34 includes a three-winding seventh coil 331 and a three-winding eighth coil 332 having lead-ins at the third layer L3 of the stator slot 7, and a three-winding ninth coil 341 and a three-winding tenth coil 342 having lead-ins at the fourth layer L4 of the stator slot 7. The ninth coil group U35, U36 includes a three-winding eleventh coil 351, a three-winding twelfth coil 352 and a three-winding thirteenth coil 353, which are introduced at the fifth layer L5 of the stator slot 7, and a three-winding fourteenth coil 361, a three-winding fifteenth coil 362 and a three-winding sixteenth coil 363, which are introduced at the sixth layer L6 of the stator slot 7.

In the assembly, the third-winding first coil 311 is inserted into the No. 13 slot of the first layer L1 and the No. 19 slot of the second layer L2, the third-winding seventh coil 331 is inserted into the No. 25 slot of the third layer L3 and the No. 31 slot of the fourth layer L4, the third-winding eleventh coil 351 is inserted into the No. 37 slot of the fifth layer L5 and the No. 43 slot of the sixth layer L6, the third-winding twelfth coil 352 is inserted into the No. 1 slot of the fifth layer L5 and the No. 7 slot of the sixth layer L6, the third-winding fourteenth coil 361 is inserted into the No. 1 slot of the sixth layer L6 and the No. 43 slot of the fifth layer L5, the third-winding ninth coil 341 is inserted into the No. 14 slot of the fourth layer L4 and the No. 8 slot of the third layer L3, the third-winding fourth coil 321 is inserted into the No. 38 slot of the second layer L2 and the No. 32 slot of the first layer L1, and the fifth coil 2 is inserted into the No. 8 slot of the third layer L1 and the second layer L3683. Then, the fifteenth coil 362 with the third winding is inserted into slot No. 13 of the sixth layer L6 and slot No. 7 of the fifth layer L5, the sixteenth coil 363 with the third winding is inserted into slot No. 1 of the sixth layer L6 and slot No. 43 of the fifth layer L5, the tenth coil 342 with the third winding is inserted into slot No. 37 of the fourth layer L4 and slot No. 31 of the third layer L3, the sixth coil 323 with the third winding is inserted into slot No. 25 of the second layer L2 and slot No. 19 of the first layer L1, the second coil 312 with the third winding is inserted into slot No. 26 of the first layer L1 and slot No. 32 of the second layer L2, the third coil 313 with the third winding is inserted into slot No. 38 of the first layer L1 and slot No. 44 of the second layer L2, the eighth coil 332 with the third winding is inserted into slot No. 2 of the third layer L3 and slot No. 8 of the fourth layer L4, and the thirteenth coil 332 with the third winding is inserted into slot No. 14 of the sixth layer L5 and slot No. 14.

Finally, a three-winding first coil 311, a three-winding seventh coil 331, a three-winding eleventh coil 351, a three-winding twelfth coil 352, a three-winding fourteenth coil 361, a three-winding ninth coil 341, a three-winding fourth coil 321, a three-winding fifth coil 322, a three-winding fifteenth coil 362, a three-winding sixteenth coil 363, a three-winding tenth coil 342, a three-winding sixth coil 323, a three-winding second coil 312, a three-winding third coil 313, a three-winding eighth coil 332 and a three-winding thirteenth coil 353 are respectively connected in series in sequence in an electrically conductive manner (can be directly connected or connected through coils), and the winding operation of the first sub-winding U1 is completed.

Furthermore, a phase voltage lead wire U3+ of the third sub-winding U3 is electrically connected to a lead-in end of the first winding 311 located on the first layer L1 of the stator slot 7, and a neutral lead wire U3-is electrically connected to a lead-out end of the thirteenth winding 353 located on the sixth layer L6 of the stator slot 7.

Further, the three-winding first coil 311 is connected in series with the three-winding seventh coil 331 through the short-distance coil 601; the three-winding seventh coil 331 is connected in series with the three-winding eleventh coil 351 through the short-distance coil 602; the three-winding eleventh coil 351 is connected in series with the three-winding twelfth coil 352 through the short-distance coil 603; the third winding twelfth coil 352 is connected with the third winding fourteenth coil 361 in series through the short distance coil 604; the fourteenth coil 361 with three windings is connected with the ninth coil 341 with three windings in series through the short distance coil 605; the third winding ninth coil 341 is connected in series with the third winding fourth coil 321 through the short distance coil 606; the third winding fourth coil 321 is connected with the third winding fifth coil 322 in series through the short-distance coil 607; the third-winding fifth coil 322 is connected in series with the third-winding fifteenth coil 362 through the long-pitch coil 608; the three-winding fifteenth coil 362 is connected in series with the three-winding sixteenth coil 363 through the short-distance coil 609; the sixteenth coil 363 with the three windings is connected with the tenth coil 342 with the short-distance coil 610 in series; the third-winding tenth coil 342 is connected in series with the third-winding sixth coil 323 through the short-distance coil 611; the third winding sixth coil 323 is connected with the third winding second coil 312 in series through the short-distance coil 612; the three-winding second coil 312 is connected in series with the three-winding third coil 313 through the short-distance coil 613; the third winding 313 is connected in series with the eighth three-winding coil 332 through the short-distance coil 614; the three-winding eighth coil 332 is connected in series with the three-winding thirteenth coil 353 through the short-distance coil 615.

Compared with the winding method of fig. 8 (at least four long- distance coils 603, 605, 608, and 613 are needed to be connected in series between the wound coils), the winding method of the third sub-winding U3 of fig. 10 only needs one long-distance coil 608 to realize the series connection between the coils of the winding, thereby effectively reducing the number of long-distance cross-connection coils, facilitating the cost control, facilitating the assembly of the three-phase stator winding, and having higher practicability.

As shown in fig. 11, the embodiment of the present invention further provides a driving motor, which includes a rotor assembly a1 and the flat wire stator assembly a2 as described above.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A flat wire stator component is applied to an M-phase motor with the rotor pole number of 2 p; the flat wire stator assembly comprises a stator core and M-phase stator windings, wherein N stator slots which are axially arranged are formed in the inner periphery of the stator core, the M-phase stator windings are wound into six layers in the stator slots, and both N, p and M are positive integers; each phase of stator winding of the M-phase stator winding comprises a sets of sub-windings connected in parallel, wherein a is a positive integer greater than 2 and is not a divisor of 2 p; each set of the sub-windings respectively comprises a first layer and a second layer distributed in the stator slot, coils distributed in a third layer and a fourth layer, and coils distributed in a fifth layer and a sixth layer, and the number of the coils distributed in the first layer and the second layer of the stator slot, the number of the coils distributed in the third layer and the fourth layer, and the number of the coils distributed in the fifth layer and the sixth layer of the stator slot are equal.

2. The flat wire stator assembly of claim 1 wherein each of said M phase stator windings comprises three sets of sub-windings, each said set of sub-windings comprising N coils connected in series, and wherein N is equal to N/3.

3. The flat wire stator assembly of claim 2 wherein the three sets of sub-windings of each phase of the stator winding comprise a first sub-winding, a second sub-winding, and a third sub-winding, respectively;

the first sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 3n/8 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the second sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 3n/8 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slot, n/4 coils distributed in the third and fourth layers of the stator slot, and 3n/8 coils distributed in the fifth and sixth layers of the stator slot.

4. The flat wire stator assembly of claim 2 wherein the three sets of sub-windings of each phase of the stator winding comprise a first sub-winding, a second sub-winding, and a third sub-winding, respectively;

the first sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slot, 5n/16 coils distributed in the third and fourth layers of the stator slot, and 5n/16 coils distributed in the fifth and sixth layers of the stator slot; the second sub-winding comprises 3n/8 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 5n/16 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises n/4 coils distributed in the first and second layers of the stator slots, 3n/8 coils distributed in the third and fourth layers of the stator slots, and 3n/8 coils distributed in the fifth and sixth layers of the stator slots.

5. The flat wire stator assembly of claim 2 wherein the three sets of sub-windings of each phase of the stator winding comprise a first sub-winding, a second sub-winding, and a third sub-winding, respectively;

the first sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 3n/8 coils distributed in the fifth layer and the sixth layer of the stator slot; the second sub-winding comprises 5n/16 coils distributed in the first layer and the second layer of the stator slot, 5n/16 coils distributed in the third layer and the fourth layer of the stator slot, and 3n/8 coils distributed in the fifth layer and the sixth layer of the stator slot; the third sub-winding comprises 3n/8 coils distributed in the first and second layers of the stator slots, 3n/8 coils distributed in the third and fourth layers of the stator slots, and n/4 coils distributed in the fifth and sixth layers of the stator slots.

6. The flat wire stator assembly of claim 3 wherein said M is 3, said p is 4, said N is 48;

the first sub-winding comprises a first coil group located in the first and second layers of the stator slot, a second coil group located in the third and fourth layers of the stator slot, and a third coil group located in the fifth and sixth layers of the stator slot;

the second sub-winding comprises a fourth coil group positioned in the first layer and the second layer of the stator slot, a fifth coil group positioned in the third layer and the fourth layer of the stator slot and a sixth coil group positioned in the fifth layer and the sixth layer of the stator slot, and the coils in the fifth coil group are not directly connected in series;

the third sub-winding comprises a seventh coil group positioned in the first layer and the second layer of the stator slot, an eighth coil group positioned in the third layer and the fourth layer of the stator slot and a ninth coil group positioned in the fifth layer and the sixth layer of the stator slot, and the coils in the eighth coil group are not directly connected in series.

7. The flat wire stator assembly of claim 6 wherein the first coil assembly comprises a first winding coil, a second winding coil and a third winding coil with lead-ins located in a first layer of the stator slots, a fourth winding coil and a fifth winding coil with lead-ins located in a second layer of the stator slots; the second coil group comprises a winding sixth coil, a winding seventh coil, a winding eighth coil, a winding ninth coil, a winding tenth coil and a winding eleventh coil, wherein the leading-in end of the winding sixth coil, the winding seventh coil and the winding eighth coil are positioned on the third layer of the stator slot; the third coil group comprises a winding twelfth coil and a winding thirteenth coil with leading-in ends positioned at the fifth layer of the stator slot, a winding fourteenth coil with leading-in ends positioned at the sixth layer of the stator slot, a winding fifteenth coil and a winding sixteenth coil;

a winding first coil, a winding sixth coil, a winding twelfth coil, a winding fourteenth coil, a winding ninth coil, a winding fourth coil, a winding fifteenth coil, a winding tenth coil, a winding sixteenth coil, a winding eleventh coil, a winding fifth coil, a winding second coil, a winding seventh coil, a winding thirteenth coil, a winding third coil and a winding eighth coil of the first sub-winding are respectively connected in series in sequence, and a phase voltage outgoing line of the first sub-winding is electrically connected to a leading-in end of the winding first coil positioned on the first layer of the stator slot, and a neutral line outgoing line of the first sub-winding is electrically connected to a leading-out end of the winding eighth coil positioned on the fourth layer of the stator slot;

the fourth coil group comprises a second winding first coil and a second winding second coil with leading-in ends positioned on the first layer of the stator slots, a second winding third coil, a second winding fourth coil and a second winding fifth coil with leading-in ends positioned on the second layer of the stator slots; the fifth coil group comprises a second winding sixth coil, a second winding seventh coil, a second winding eighth coil, a second winding ninth coil, a second winding tenth coil and a second winding eleventh coil, wherein the leading-in end of the second winding sixth coil, the second winding seventh coil and the second winding eighth coil are positioned on the third layer of the stator slot; the sixth coil group comprises a twelfth coil with a lead-in end positioned on the fifth layer of the stator slot, a thirteenth coil with a second winding, a fourteenth coil with a second winding, a fifteenth coil with a lead-in end positioned on the sixth layer of the stator slot and a sixteenth coil with a second winding;

and a second winding ninth coil, a second winding third coil, a second winding fifteenth coil, a second winding tenth coil, a second winding fourth coil, a second winding first coil, a second winding sixth coil, a second winding twelfth coil, a second winding seventh coil, a second winding thirteenth coil, a second winding second coil, a second winding eighth coil, a second winding fourteenth coil, a second winding sixteenth coil, a second winding eleventh coil and a second winding fifth coil of the second sub-winding are sequentially connected in series, respectively, and a phase voltage outgoing line of the second sub-winding is electrically connected to a leading-in end of the second winding ninth coil located on the fourth layer of the stator slot, and a neutral line outgoing line is electrically connected to a leading-out end of the second winding fifth coil located on the first layer of the stator slot.

8. The flat wire stator assembly of claim 7 wherein the seventh coil set comprises a three-winding first coil, a three-winding second coil, and a three-winding third coil having lead-ins located in a first layer of the stator slots, a three-winding fourth coil, a three-winding fifth coil, and a three-winding sixth coil having lead-ins located in a second layer of the stator slots; the eighth coil group comprises a third-winding seventh coil and a third-winding eighth coil with leading-in ends positioned on the third layer of the stator slot, and a third-winding ninth coil and a third-winding tenth coil with leading-in ends positioned on the fourth layer of the stator slot; the ninth coil group comprises a third-winding eleventh coil, a third-winding twelfth coil, a third-winding thirteenth coil, a third-winding fourteenth coil, a third-winding fifteenth coil and a third-winding sixteenth coil, wherein the leading-in end of the third-winding eleventh coil, the third-winding twelfth coil and the third-winding thirteenth coil are positioned at the fifth layer of the stator slot;

and a phase voltage outgoing line of the third sub-winding is electrically connected to a leading-in end of the fourteenth coil of the three-winding, and a neutral line outgoing line of the third sub-winding is electrically connected to a leading-out end of the sixth coil of the three-winding at the sixth layer of the stator slot.

9. The flat wire stator assembly of claim 7 wherein the seventh coil set comprises a three-winding first coil, a three-winding second coil, and a three-winding third coil with lead-ins located in a first layer of the stator slots, a three-winding fourth coil, a three-winding fifth coil, and a three-winding sixth coil with lead-ins located in a second layer of the stator slots; the eighth coil group comprises a third-winding seventh coil and a third-winding eighth coil with leading-in ends positioned on the third layer of the stator slot, and a third-winding ninth coil and a third-winding tenth coil with leading-in ends positioned on the fourth layer of the stator slot; the ninth coil group comprises a third-winding eleventh coil, a third-winding twelfth coil, a third-winding thirteenth coil, a third-winding fourteenth coil, a third-winding fifteenth coil and a third-winding sixteenth coil, wherein the leading-in end of the third-winding eleventh coil, the third-winding twelfth coil and the third-winding thirteenth coil are positioned at the fifth layer of the stator slot;

and a phase voltage outgoing line of the third sub-winding is electrically connected to a leading-in end of the first layer of the three-winding, and a neutral line outgoing line of the third sub-winding is electrically connected to a leading-out end of the thirteenth layer of the three-winding, which is located at the stator slot.

10. A drive motor comprising a rotor assembly and the flat wire stator assembly of any of claims 1-9.

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