Patent Grant
12176775
This application is the United States National Phase of International Application No.: PCT/CN2019/130273, filed Dec. 31, 2019, the entire contents of which are herein incorporated by reference in their entirety.
The present application relates to a stator winding structure and a motor including such a stator winding structure, specifically to a stator winding structure with flat wire construction. The motor including such a stator winding can be used as a drive motor or a generator for a new energy vehicle, etc.
A motor, such as an AC motor, includes a stator assembly and a rotor assembly. The stator assembly usually includes a stator winding and a stator core. The stator winding provides electrical energy input and magnetic field establishment for motor, while the stator core provides magnetic load path for motor.
In order to improve power density, heat dissipation and structural stability, the motors used in new energy vehicles often use hairpin-typed flat-wire windings, greatly increasing the slot fill rate of the stators and improving motor power density.
Flat wire windings can be adopted with different strategies or ways. In the prior art, multi-layer flat copper wire wave windings are usually used to reduce AC copper consumption in motors.
For multi-layer windings (8 layers and above), parallel winding with multiple branches in one phase is often used to match the torque and voltage characteristics of the motor. In an example of 4 parallel-winding branches with 8-layer flat copper wire, for the U-phase winding, the first parallel-winding branch is formed by connecting the first and second conductors in the corresponding slots, the second parallel-winding branch is formed by connecting the third and fourth conductors in the corresponding slots, the third parallel-winding branch is formed by connecting the fifth and sixth conductors in the corresponding slots, and the fourth parallel-winding branch is formed by connecting the seventh and eighth conductors in the corresponding slots. The above-mentioned four parallel-winding branches are connected head-to-head forming the head end of the U-phase winding and tail-to-tail forming the tail end of the U-phase winding. The U-phase is connected to the V and W phases respectively forming a Y-type three-phase winding or a delta-type three-phase winding.
Although desired torque and power can be achieved by the above-mentioned way, an unbalanced current loop between the parallel-winding branches of the same phase will be generated due to unequal electromagnetic coupling, which will cause further copper consumption and torque fluctuation and bring considerable negative impact to motor performances.
Therefore, there is an urgent need to provide a stator winding structure and a motor including a stator winding structure which can be more advantageous in at least one aspect compared to the prior art.
For the widely used 8-pole multilayer (8 layers and above) flat copper wire winding generating electrical current loop due to uneven electromagnetic coupling caused by magnetic leakage, the present invention proposes a 4-branch parallel winding structure.
Specifically, in one aspect, the present application provides a stator winding structure for a motor, the motor being a three-phase AC motor having eight poles, comprising phases U, V and W; wherein each phase comprises four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch, each parallel-winding branch having a head end and a tail end, the winding directions of the first and third parallel-winding branches being the same, and the winding directions of the second and fourth parallel-winding branches being the same and opposite to the winding directions of the first and third parallel-winding branches, the three-phase AC motor being capable of normal operation when being energized,
In a further aspect, the present application provides a stator winding structure for a motor, the motor being a three-phase AC motor having eight poles, comprising phases U, V and W; wherein each phase comprises four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch, each parallel-winding branch having a head end and a tail end, the winding directions of the first and third parallel-winding branches being the same, and the winding directions of the second and fourth parallel-winding branches being the same and both opposite to the winding directions of the first and third parallel-winding branches, the three-phase AC motor being capable of normal operation when being energized,
Optionally, each of the conductors of the first parallel-winding branch and the third parallel-winding branch at head ends is located in an odd layer of slot i±2ky, respectively, where k=0, 1, 2, 3 . . . and so on; and wherein each of the conductors of the second parallel-winding branch and the fourth parallel-winding branch at head ends is located in an even layer of stator i±2ky, where k=0, 1, 2, 3 . . . and so on.
Optionally, the head and tail ends of the first parallel-winding branch, the second parallel-winding branch, the third parallel-winding branch and the fourth parallel-winding branch are located in layer 1 or layer L.
Optionally, the head ends of two of the four parallel-winding branches are located in layer 1 and layer L of slot i respectively; and the head ends of the other two of the four parallel-winding branches are located in layer 1 and layer L of slot i+Q/2, respectively.
Optionally, the stator winding structure is configured as a Y-type winding structure connected in a tail-to-tail manner or a delta-type winding structure connected in a head-to-tail manner.
Optionally, the stator winding structure is a full pitch winding structure, a short pitch winding structure or a long pitch winding structure.
In a further aspect, the present application provides a motor comprising a stator winding structure according to the above.
Optionally, the motor includes 48 stator slots, each stator slot having 8 layers.
Optionally, phase U comprises four parallel-winding branches: a first parallel-winding branch of phase U, a second parallel-winding branch of phase U, a third parallel-winding branch of phase U and a fourth parallel-winding branch of phase U; “{circumflex over ( )}” representing connection with connecting part of a U-shaped flat copper wire, “-” representing connection by soldering, “↔” representing connection by deflector, and “i.j” denoting layer j in slot i; and wherein
Optionally, phase U comprises four parallel-winding branches: a first parallel-winding branch of phase U, a second parallel-winding branch of phase U, a third parallel-winding branch of phase U and a fourth parallel-winding branch of phase U; “{circumflex over ( )}” representing connection with connecting part of a U-shaped flat copper wire, “-” representing connection by soldering, “↔” representing connection by deflector, and “i.j” denoting layer j in slot i; and wherein
Optionally, phase U comprises four parallel-winding branches: a first parallel-winding branch of U phase, a second parallel-winding branch of phase U, a third parallel-winding branch of phase U and a fourth parallel-winding branch of phase U; “{circumflex over ( )}” representing connection with connecting part of a U-shaped flat copper wire, “-” representing connection by soldering, “↔” representing connection by deflector, and “i.j” denoting layer j in slot i; and wherein
In a further aspect, the present application provides a vehicle comprising a motor according to the above.
Both of the stator winding structure and the motor including the stator winding structure provided in this application are able to achieve the purpose of weakening and reducing electrical current loop, reducing additional copper consumption caused by the electrical current loop, and improving motor performance, etc.
In addition, the winding structure and the motor including the stator winding structure claimed to be protected by this application enable conductors of the same branch circuit to be distributed in the circumferential direction in each conductor layer of the stator slot. With connecting conductors located at different radius positions in the stator slot to each other, it is possible to achieve at least one of the following purposes: improving heat dissipation capacity of conductors in the stator slot away from the coolant, balancing temperature difference between layers of conductors, increasing continuous power and power density of the motor, reducing heat radiation from stators to rotors, controlling rotor temperature, and reducing end size of armature to some extent.
Some possible embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the figures are not drawn to scale. Some details may have been enlarged for clarity, and some details not necessary to be shown have been omitted.
A motor includes a stator and a rotor (not shown). The stator includes a stator core 11 and a stator winding structure 100. The stator core 11 has a plurality of slots circumferentially distributed.
The stator winding structure 100 may comprise a plurality of U-shaped flat copper wires 10 shown in
The U-shaped flat copper wire 10 comprises: a first conductor 1 and a second conductor 2 and a connecting part 3. In the orientation shown in
In the present application, the end with the connecting part 3 is the U-shaped end (top of
In this disclosure, the stator winding structure 100 of the stator comprises a three-phase (U, V and W phases) winding structure with a phase difference of 120° electrical angle, and the stator winding structure 100 is arranged in the slots of the stator core 11.
Each phase of the three-phase winding comprises four parallel-winding branches wound on the core 11: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch. The first and third parallel-winding branches have the same winding direction, and the second and fourth parallel-winding branches have the same winding direction and are both opposite to the winding direction of the first and third parallel-winding branches. The three-phase AC motor is able to operate normally when energized.
According to different needs, the three-phase winding may be formed as a Y-type winding with tail-to-tail connection or as a delta-type winding with head-to-tail connection. In the disclosure of this application, the Y-type winding connection is used for illustrative reasons (as shown in
The slot number of the motor is represented as Q. As may be known, the start of slots can be any slot and the number can be incremented clockwise or counterclockwise. The number of pairs of pole is represented as P (number of poles is represented as p, and p=2*P=8), the pole pitch represented as τ and τ=Q/p, the pitch of the full pitch winding represented as y, and y=τ. Each phase of the winding structure includes a plurality of in-slot conductors that are all inserted into the slots of the stator core 11. In each slot of the stator core 11, there are arranged L (L represents the number of layers) layers for conductor sections, where L is an even number and L=8+4*1 (1=0, 1, 2, 3 . . . and so on (1 is a natural number)). q represents the number of slots per pole per phase, where q=(Q/p)/3 and q=1, 2, 3 . . . and so on (that is to say, q is a natural number started from 1).
According to an embodiment of the present application, the connecting part 3 (U-shaped end) of each of the plurality of U-shaped flat copper wires 10 constituting the stator winding structure 100 is at the first side of the motor. Similarly, the solder end of each of the plurality of U-shaped flat copper wires 10 constituting the stator winding structure 100 is at the second side of the motor, wherein the second side is opposite to the first side.
In one embodiment of the present application, as seen from the side of the connecting part 3 (the first side), two conductors 1, 2 of the U-shaped flat copper wire are connected as:
where the value of i is a function of the phase of the winding and the branch number, and where i−y=i−y+Q when i−y<0 and i+y=i+y−Q when i+y>Q.
Accordingly, as seen from the solder end of the motor (the second side), two conductors being soldered or joined with deflector to form the three-phase AC motor are connected as:
where the value of i is a function of the phase of the winding and the branch number, and where i−y=i−y+Q when i−y<0 and i+y=i+y−Q when i+y>Q.
Alternatively, in another embodiment of the present application, as seen from the side with the solder end (the second side), two conductors 1, 2 being soldered together to form a three-phase AC motor with a pole number of 8 and including four parallel-winding branches per phase are connected as
where the value of i is a function of the phase of the winding and the branch number and where i−y=i−y+Q when i−y<0 and i+y=i+y−Q when i+y>Q.
Accordingly, as seen from the side of the motor with the connecting part (the first side), two conductors 1, 2 are connected with deflector or connecting part 3 as:
where the value of i is a function of the phase of the winding and the branch number and where i−y=i−y+Q when i−y<0 and i+y=i+y−Q when i+y>Q.
For the four parallel-winding branches included in each phase, each of the first conductors of the first and the third parallel-winding branches is located in an odd layer of an i±2ky stator slot (k=0, 1, 2, . . . ) respectively; each of the first conductors of the second and the fourth parallel-winding branches is located in in an even layer of an i±2ky stator slot (k=0, 1, 2, . . . ) respectively. Note that one layer in one slot corresponds to one conductor, as is known to those skilled in the art. The corresponding end positions can be deduced from the connection of the conductors as described above and are therefore not repeated.
Alternatively, each of the first ends of the second and the fourth parallel-winding branches is located in an odd layer of an i±2ky stator slot (k=0, 1, 2 . . . ) respectively; each of the first ends of the first and the third parallel-winding branches is located in an even layer of an i±2ky stator slot (k=0, 1, 2 . . . ) respectively. Note that, as known to those skilled in the art, one layer in one slot corresponds to one conductor. The corresponding end positions can be deduced from the connection of the conductors as described above and are therefore not repeated.
All wiring structures derived from the above are within the scope of protection of this application.
In one embodiment, the winding structure is configured such that all head and tail ends of the 4 parallel-winding branches are located in the first or Lth layer of the stator slot. For example, the head ends of two of the four parallel-winding branches are located in layer 1 and layer L of the ith stator slot respectively; and accordingly, the tail ends of the two parallel-winding branches are located in layer L of stator slot i−y+1 and layer 1 of stator slot i+y+1, respectively; the head ends of the other two parallel-winding branches of the four parallel-winding branches are located in layer 1 and layer L of stator slot i+Q/2 respectively; and accordingly, the tail ends of the other two parallel-winding branches are located in layer L of stator slot i+Q/2−y+1 and layer 1 of stator slot i+Q/2+y+1, respectively.
Optionally, each parallel-winding branch for each phase of the winding structure may be viewed as consisting of secondary branches with the number of qL/2 connected in series.
In some embodiments, a deflector 12 may be used to connect respective conductors during constructing of the stator winding structure 100 disclosed in this application. The deflector 12 may be any suitable deflector known in the art.
For better understanding of the present invention, the following three examples are shown, taking as an example an 8-layer (numbered as layer 1 to 8, respectively) winding with 8 poles and 48 slots (numbered as slot 1 to 48, respectively). Of course, the scope of protection of the present invention is not limited to the three examples below.
In this example of a three-phase AC motor, a stator includes a stator core 11 and a stator winding structure 100. The stator core 11 has a plurality of slots distributed thereon circumferentially. The stator winding structure 100 consists of a plurality of U-shaped flat copper wires 10.
The outlet wires of the three phases (U, V and W phases) of the stator are at the soldered ends of the U-shaped flat copper wires 10 of the stator winding structure 100. Accordingly, a deflector 12 (as shown in
A perspective view, a wiring structure, and an expansion diagram from the U-shaped end (first side) of the four parallel-winding branches of the U-phase winding structure 100U of Example I are shown in
Each phase includes four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch respectively.
The first parallel-winding branch of the winding structure of phase U is connected in the following way as partially shown:
According to the above, the complete connection of Example 1 can be seen as follows.
As shown in
1.1{circumflex over ( )}7.2-13.1{circumflex over ( )}19.2-25.3{circumflex over ( )}31.4-37.3{circumflex over ( )}43.4-1.5{circumflex over ( )}7.6-13.5{circumflex over ( )}19.6-25.7{circumflex over ( )}31.8-37.7{circumflex over ( )}43.8↔2.1{circumflex over ( )}8.2-14.1{circumflex over ( )}20.2-26.3{circumflex over ( )}32.4-38.3{circumflex over ( )}44.4-2.5{circumflex over ( )}8.6-14.5{circumflex over ( )}20.6-26.7{circumflex over ( )}32.8-38.7{circumflex over ( )}44.8 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
1.8{circumflex over ( )}43.7-37.8{circumflex over ( )}31.7-25.6{circumflex over ( )}19.5-13.6{circumflex over ( )}7.5-1.4{circumflex over ( )}43.3-37.4{circumflex over ( )}31.3-25.2{circumflex over ( )}19.1-13.2 {circumflex over ( )}7.1↔2.8{circumflex over ( )}44.7-38.8{circumflex over ( )}32.7-26.6{circumflex over ( )}20.5-14.6{circumflex over ( )}8.5-2.4{circumflex over ( )}44.3-38.4{circumflex over ( )}32.3-26.2{circumflex over ( )}20.1-14.2{circumflex over ( )}8.1 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
25.1{circumflex over ( )}31.2-37.1{circumflex over ( )}43.2-1.3{circumflex over ( )}7.4-13.3{circumflex over ( )}19.4-25.5{circumflex over ( )}31.6-37.5{circumflex over ( )}43.6-1.7{circumflex over ( )}7.8-13.7{circumflex over ( )}19.8↔26.1{circumflex over ( )}32.2-38.1{circumflex over ( )}44.2-2.3{circumflex over ( )}8.4-14.3{circumflex over ( )}20.4-26.5{circumflex over ( )}32.6-38.5{circumflex over ( )}44.6-2.7{circumflex over ( )}8.8-14.7{circumflex over ( )}20.8 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
25.8{circumflex over ( )}19.7-13.8{circumflex over ( )}7.7-1.6{circumflex over ( )}43.5-37.6{circumflex over ( )}31.5-25.4{circumflex over ( )}19.3-13.4{circumflex over ( )}7.3-1.2{circumflex over ( )}43.1-37.2{circumflex over ( )}31.1↔26.8{circumflex over ( )}20.7-14.8{circumflex over ( )}8.7-2.6{circumflex over ( )}44.5-38.6{circumflex over ( )}32.5-26.4{circumflex over ( )}20.3-14.4{circumflex over ( )}8.3-2.2{circumflex over ( )}44.1-38.2{circumflex over ( )}32.1 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector).
The winding structures of Phase V and Phase W can be obtained according to the above patterns, and thus not repeated here.
In this example of a three-phase AC motor, a stator comprises a stator core 11 and a stator winding structure 100. The stator core 11 has a plurality of slots distributed thereon circumferentially. The stator winding structure 100 consists of a plurality of U-shaped flat copper wires 10.
The outlet wires of the three phases (U, V and W phases) of the stator are at the soldered ends of the U-shaped flat copper wires 10 of the stator winding structure 100. Accordingly, a deflector 12 (shown in
A perspective view, a wiring structure and an expansion diagram from the U-shaped end (first side) of the four parallel-winding branches of the U-phase winding structure 100U of Example II are shown in
Each phase includes four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch, respectively.
The first parallel-winding branch of the winding structure of phase U is connected in the following way partially shown as:
According to the above, the complete connection of Example II can be seen as follows.
As shown in
13.1{circumflex over ( )}19.2-25.3{circumflex over ( )}31.4-37.3{circumflex over ( )}43.4-1.5{circumflex over ( )}7.6-13.5{circumflex over ( )}19.6-25.7{circumflex over ( )}31.8-37.7{circumflex over ( )}43.8↔2.1{circumflex over ( )}8.2-14.1{circumflex over ( )}20.2-26.3{circumflex over ( )}32.4-38.3{circumflex over ( )}44.4-2.5{circumflex over ( )}8.6-14.5{circumflex over ( )}20.6-26.7{circumflex over ( )}32.8-38.7{circumflex over ( )}44.8 ↔1.1{circumflex over ( )}7.2 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
1.8{circumflex over ( )}43.7-37.8{circumflex over ( )}31.7-25.6{circumflex over ( )}19.5-13.6{circumflex over ( )}7.5-1.4{circumflex over ( )}43.3-37.4{circumflex over ( )}31.3-25.2{circumflex over ( )}19.1-13.2 {circumflex over ( )}7.1↔2.8{circumflex over ( )}44.7-38.8{circumflex over ( )}32.7-26.6{circumflex over ( )}20.5-14.6{circumflex over ( )}8.5-2.4{circumflex over ( )}44.3-38.4{circumflex over ( )}32.3-26.2{circumflex over ( )}20.1-14.2{circumflex over ( )}8.1 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” means by deflector connection);
As shown in
13.3{circumflex over ( )}19.4-25.5{circumflex over ( )}31.6-37.5{circumflex over ( )}43.6-1.7{circumflex over ( )}7.8-13.7{circumflex over ( )}19.8↔26.1{circumflex over ( )}32.2-38.1{circumflex over ( )}44.2-2.3{circumflex over ( )}8.4-14.3{circumflex over ( )}20.4-26.5{circumflex over ( )}32.6-38.5{circumflex over ( )}44.6-2.7{circumflex over ( )}8.8-14.7{circumflex over ( )}20.8↔25.1{circumflex over ( )}31.2-37.1{circumflex over ( )}43.2-1.3{circumflex over ( )}7.4 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
1.6{circumflex over ( )}43.5-37.6{circumflex over ( )}31.5-25.4{circumflex over ( )}19.3-13.4{circumflex over ( )}7.3-1.2{circumflex over ( )}43.1-37.2{circumflex over ( )}31.1↔26.8{circumflex over ( )}20.7-14.8{circumflex over ( )}8.7-2.6{circumflex over ( )}44.5-38.6{circumflex over ( )}32.5-26.4{circumflex over ( )}20.3-14.4{circumflex over ( )}8.3-2.2{circumflex over ( )}44.1-38.2{circumflex over ( )}32.1↔25.8{circumflex over ( )}19.7-13.8{circumflex over ( )}7.7 (Note: “{circumflex over ( )}” represents connected by means of connecting parts, “-” represents connected by soldering, “↔” represents connected by defector connection).
The winding structure of Phase V and Phase W can be obtained according to the above patterns, and thus not repeated here.
In this example of a three-phase AC motor, a stator includes a stator core 11 and a stator winding structure 100. The stator core 11 has a plurality of slots distributed circumferentially. The stator winding structure 100 consists of a plurality of U-shaped flat copper wires 10.
The outlet wires of the three phases (U, V and W phases) of the stator are at the soldered ends of the U-shaped flat copper wires 10 of the stator winding structure 100. Accordingly, a deflector 12 (shown in
A perspective view, a wiring structure and an expansion diagram from the U-shaped end (first side) of the four parallel-winding branches of the U-phase winding structure 100U of Example III are shown in
Each phase includes four parallel-winding branches: a first parallel-winding branch, a second parallel-winding branch, a third parallel-winding branch and a fourth parallel-winding branch, respectively.
The first parallel-winding branch of the winding structure of phase U is connected in the following way partially shown as:
Based on the above, the complete connection of Example III can be seen as follows.
As shown in
8.1-14.2{circumflex over ( )}20.1-26.2{circumflex over ( )}32.3-38.4{circumflex over ( )}44.3-2.4{circumflex over ( )}8.5-14.6{circumflex over ( )}20.5-26.6{circumflex over ( )}32.7-38.8{circumflex over ( )}44.7-2.8↔7.1-13.2{circumflex over ( )}19.1-25.2{circumflex over ( )}31.3-37.4{circumflex over ( )}43.3-1.4{circumflex over ( )}7.5-13.6{circumflex over ( )}19.5-25.6{circumflex over ( )}31.7-37.8{circumflex over ( )}43.7-1.8 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
44.8-38.7{circumflex over ( )}32.8-26.7{circumflex over ( )}20.6-14.5{circumflex over ( )}8.6-2.5{circumflex over ( )}44.4-38.3{circumflex over ( )}32.4-26.3{circumflex over ( )}20.2-14.1{circumflex over ( )}8.2-2.1↔43.8-37.7{circumflex over ( )}31.8-25.7{circumflex over ( )}19.6-13.5{circumflex over ( )}7.6-1.5{circumflex over ( )}43.4-37.3{circumflex over ( )}31.4-25.3{circumflex over ( )}19.2-13.1{circumflex over ( )}7.2-1.1 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
32.1-38.2{circumflex over ( )}44.1-2.2{circumflex over ( )}8.3-14.4{circumflex over ( )}20.3-26.4{circumflex over ( )}32.5-38.6{circumflex over ( )}44.5-2.6{circumflex over ( )}8.7-14.8{circumflex over ( )}20.7-26.8↔31.1-37.2{circumflex over ( )}43.1-1.2{circumflex over ( )}7.3-13.4{circumflex over ( )}19.3-25.4{circumflex over ( )}31.5-37.6{circumflex over ( )}43.5-1.6{circumflex over ( )}7.7-13.8{circumflex over ( )}19.7-25.8 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector);
As shown in
20.8-14.7{circumflex over ( )}8.8-2.7{circumflex over ( )}44.6-38.5{circumflex over ( )}32.6-26.5{circumflex over ( )}20.4-14.3{circumflex over ( )}8.4-2.3{circumflex over ( )}44.2-38.1{circumflex over ( )}32.2-26.1↔19.8-13.7{circumflex over ( )}7.8-1.7{circumflex over ( )}43.6-37.5{circumflex over ( )}31.6-25.5{circumflex over ( )}19.4-13.3{circumflex over ( )}7.4-1.3{circumflex over ( )}43.2-37.1{circumflex over ( )}31.2-25.1 (Note: “{circumflex over ( )}” represents connected with connecting part, “-” represents connected by soldering, “↔” represents connected with deflector).
The winding structure of Phase V and Phase W can be obtained according to the above patterns, and thus not repeated here.
It is to be understood that although this application is based on an example of Y-type winding structure, the features claimed to be protected by this application can also be applied to delta-type winding structure.
It will be understood that although the present application is exemplified by a full pitch winding structure, the features claimed to be protected by the present application can also be applied to a short pitch winding structure and a long pitch winding structure.
Although the present application is described herein with reference to specific embodiments, the scope of the present application is not limited to the details shown. Various modifications may be made to these details without departing from the basic principles of the present application.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2019/130273 | 12/31/2019 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2021/134387 | 7/8/2021 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 6285105 | Asao | Sep 2001 | B1 |
| 6455972 | Asao | Sep 2002 | B1 |
| 6862797 | Neet | Mar 2005 | B2 |
| 8179013 | Ishizuka | May 2012 | B2 |
| 9847686 | Tamura | Dec 2017 | B2 |
| 20120146447 | Seguchi et al. | Jun 2012 | A1 |
| 20140125187 | Suzuki et al. | May 2014 | A1 |
| 20140285056 | Tomohara | Sep 2014 | A1 |
| 20140333172 | Onishi | Nov 2014 | A1 |
| 20150076953 | Tamura | Mar 2015 | A1 |
| 20150091408 | Azusawa | Apr 2015 | A1 |
| 20150097453 | Nishikawa et al. | Apr 2015 | A1 |
| 20170033619 | Tamura | Feb 2017 | A1 |
| 20170256996 | Nakamura et al. | Sep 2017 | A1 |
| 20190363663 | Hirotani et al. | Nov 2019 | A1 |
| Number | Date | Country |
|---|---|---|
| 103280906 | Sep 2013 | CN |
| 207320983 | May 2018 | CN |
| 109586459 | Apr 2019 | CN |
| 209233596 | Aug 2019 | CN |
| 110417152 | Nov 2019 | CN |
| 110611387 | Dec 2019 | CN |
| 2012-130093 | Jul 2012 | JP |
| 2013-128362 | Jun 2013 | JP |
| 2014-096857 | May 2014 | JP |
| 2015023672 | Feb 2015 | JP |
| 2015-076905 | Apr 2015 | JP |
| 2015-084635 | Apr 2015 | JP |
| 2017149935 | Sep 2017 | WO |
| Entry |
|---|
| CN Office Action and Search Report for Application No. 201911407267.1, mailed Nov. 29, 2021. |
| PCT International Search Report in International Application No. PCT/CN2019/130273, mailed Jul. 28, 2020. |
| JP Office Action for Application No. 2022-526441, mailed May 9, 2023 (with machine translation) 10 pp. |
| European search report for Application No. 19958441.8, mailed Aug. 8, 2023. |
| Number | Date | Country | |
|---|---|---|---|
| 20220407378 A1 | Dec 2022 | US |
