Novel single-layer and double-layer mixed unequal-turn winding

Abstract

The utility model discloses a novel single-layer and double-layer mixed unequal-turn winding, which relates to the field of motor manufacturing, comprises U, V and W three-phase windings which are uniformly distributed, and coil windings are concentrically connected, and is characterized in that each group of coils of a 2, 4 and 6-pole motor with integer slots of which the slot number q of each pole and each phase is greater than or equal to 3 consists of at least one double-layer winding and one single-layer winding, the number of turns of external coils of the same winding is minimum, the number of turns of internal coils is more and more, and cosine distribution is formed; the consumption of copper materials of the winding can be effectively reduced, higher harmonics can be effectively weakened, and the efficiency of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, and in particular to a novel winding. Background Technology

[0002] While conventional single-layer or double-layer windings are relatively simple and convenient to operate in terms of winding, winding, and connection, they also have disadvantages such as high copper consumption at the ends, low efficiency, high temperature rise, and high electromagnetic harmonics. Currently, when each winding adopts a concentric winding method, it is the conventional winding method to have more turns in the outer coil and fewer turns in the inner coil within the same winding. Even if the number of turns in the outer and inner coils of the same winding is the same, since the span of the outer coil is greater than that of the inner coil, the end length of the outer coil of the winding must be greater than that of the inner coil. This results in a large amount of copper used in the coils, high copper consumption, and difficulty in reducing the production cost of the motor. Utility Model Content

[0003] The purpose of this invention is to provide a novel single- or double-layer hybrid unequal-turn winding, which can not only effectively reduce the copper consumption of the winding but also effectively weaken high-order harmonics and improve the efficiency of the motor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a novel single- and double-layer hybrid unequal-turn winding, comprising U, V, and W three-phase windings evenly distributed, with the coil windings being concentrically connected, characterized in that: for 2, 4, and 6-pole motors with an integer number of slots q≥3 per pole per phase, each group of coils consists of one single-layer winding and at least one double-layer winding, with the outer coil of the same winding having the fewest turns and the inner coil having an increasing number of turns, forming a cosine distribution.

[0005] This invention changes the winding distribution, with fewer outer coils and more inner coils. This reduces the length of the winding ends, the amount of copper used, and the cost, while effectively weakening high-order harmonics, further reducing the copper loss of the motor and improving its efficiency. Attached Figure Description

[0006] Figure 1 , 2 Figures 3 and 4 are the winding development diagrams of the first, second, and third embodiments of this utility model, respectively.

[0007] Figure 1 In the middle, q=3, 6 poles, 54 slots; Figure 2 In the middle, q=4, 4 poles, 48 ​​slots; Figure 3 In the middle, q = 6, 2 poles, 36 slots. Detailed Implementation

[0008] The novel single- and double-layer hybrid unequal-turn winding provided by this utility model includes three-phase windings U, V, and W evenly distributed, with the coil windings being concentrically connected. It is a 2, 4, or 6-pole motor with an integer number of slots q≥3 per pole per phase. Each group of coils consists of one single-layer winding and at least one double-layer winding. The outer coil of the same winding has the fewest turns, while the inner coil has an increasing number of turns, forming a cosine distribution.

[0009] The above technical solution mainly solves the problem of excessive material consumption due to the large space span of the outer coil end in the same winding in the prior art. It adopts a scheme with the fewest outer coil turns and the more and more inner coil turns in the same winding, which reduces the copper consumption that would inevitably increase when the winding end is too long and has a large number of turns. Therefore, the solution provided by this utility model directly reduces the material cost of the motor and effectively weakens high-order harmonics, thereby improving the efficiency of the motor. In addition, since the number of outer coil turns is reduced, the winding time is also reduced accordingly, further improving the winding efficiency of the winding.

[0010] Preferably, the number of internal coil turns in the same winding is the largest, the maximum span is 1 to τ+(q-2), where τ is the pitch, the minimum span is (q-1) to τ, where τ is the pitch, q is the number of slots per pole per phase and q≥3.

[0011] Each coil group has only one single-layer winding, suitable for 2-, 4-, and 6-pole motors with an integer number of slots q ≥ 3 per pole per phase. The outer coil has the fewest turns, while the inner coil has an increasing number of turns, with the single-layer winding having the most turns, arranged in a cosine distribution. The maximum span is 1 to τ + (q - 2), where τ is the pitch, resulting in a double-layer winding with the fewest turns; the span is 2 to τ + (q - 1), also a double-layer winding, but with an increased number of turns…; the span is (q - 1) to τ, resulting in a single-layer winding with the most turns.

[0012] The following combination Figure 2 The disclosed Embodiment 2 is a detailed description using a 48-slot 4-pole winding as an example.

[0013] Figure 2 In this circuit, the three-phase windings—U-phase, V-phase, and W-phase—are evenly distributed. Each phase winding has four sets of coils, and each coil consists of one double-layer winding 1, one double-layer winding 2, and one single-layer winding 3. The winding sequence is as follows: First, wind the first set of U-phase coils, with spans 1-14 for double-layer winding 1, spans 2-13 for double-layer winding 2, and spans 3-12 for single-layer winding 3; leave one slot empty, and begin winding the first set of V-phase coils from slot 5 (winding sequence consistent with U-phase); leave one slot empty, and begin winding the first set of W-phase coils from slot 9; leave one slot empty, and begin winding the second set of U-phase coils from slot 13… The last W-phase coil (span 43-4 single-layer winding) is then wound.

[0014] The following tables 1, 2, and 3 are related to Figure 1 , 2 Table of winding internal distribution corresponding to 3.

[0015] Table 1:

[0016]

[0017] In Table 1 above: the three-phase symmetrical windings are U, V, and W respectively; each phase of the 6-pole winding has 6 groups, and each group has 2 coils, one of which is a double-layer winding and the other is a single-layer winding; the first coil has fewer turns (accounting for about 1 / 2 of the entire slot), is embedded in the same slot as another group of coils in the same phase, is a double-layer winding, and is marked as U-1 (V-1 or W-1); the second coil has more turns (accounting for the entire slot), is a single-layer winding, and is marked as U-2 (V-2 or W-2).

[0018] Table 2:

[0019]

[0020] In Table 2 above: the three-phase symmetrical windings are U, V, and W respectively; each phase of the 4-pole winding has 4 groups, and each group has 3 coils, two of which are double-layer windings and one is a single-layer winding; the first coil has the fewest turns (accounting for about 1 / 3 of the entire slot), and is embedded in the same slot as another group of coils in the same phase (accounting for 2 / 3 of the slot), which is a double-layer winding and is marked as U-1 (V-1 or W-1); the second coil has a slightly increased number of turns (accounting for about 2 / 3 of the entire slot), and is embedded in the same slot as another group of coils in the same phase (accounting for 1 / 3 of the slot), which is also a double-layer winding and is marked as U-2 (V-2 or W-3); the third coil has a large number of turns (filling the entire slot), which is a single-layer winding and is marked as U-3 (V-3 or W-3).

[0021] Table 3:

[0022]

[0023] In Table 3 above: the three-phase symmetrical windings are U, V, and W; each phase has two sets of 2-pole windings, each set has 5 coils, four of which are double-layer windings and one is a single-layer winding; the first coil has the fewest turns (approximately 1 / 5 of the entire slot), and is embedded in the same slot as another set of coils in the same phase (4 / 5 of the slot), forming a double-layer winding, and is marked as U-1 (V-1 or W-1); the second coil has an increased number of turns (approximately 2 / 5 of the entire slot), and is embedded in the same slot as another set of coils in the same phase (3 / 5 of the slot). The first slot, also a double-layer winding, is marked U-2 (V-2 or W-3); the third coil continues to increase in the number of turns (accounting for about 3 / 5 of the entire slot type), and is embedded in the same slot as another group of coils in the same phase (accounting for 2 / 5 of the slot type), forming a double-layer winding; the fourth coil continues to increase in the number of turns (accounting for about 4 / 5 of the entire slot type), and is embedded in the same slot as another group of coils in the same phase (accounting for 1 / 5 of the slot type), forming a double-layer winding; the fifth coil has a large number of turns (filling the entire slot type), forming a single-layer winding, marked U-5 (V-5 or W-5).

[0024] Table 4: Summary of Comparative Test Data (WN-132S-4 Type)

[0025]

[0026] Conclusion: The performance of this prototype is similar to that of the sinusoidal design in terms of copper usage and motor performance. The prototype was relatively easy to wire, the winding die could be shortened, the copper usage could be reduced, and the efficiency could be improved.

Claims

1. A new type of single-double layer hybrid unequal-turn winding, comprising U, V, W three-phase winding uniformly distributed, the coil winding is concentrically connected, characterized in that: 2, 4, 6-pole motor with integral slots of integer number q≥3 slots per pole per phase, each group of coils is composed of 1 single-layer winding and at least 1 double-layer winding, the outer coil turns of the same winding are least, the inner coil turns are more and more, and the distribution is cosine.

2. The novel single double-layer hybrid unequal-turn winding of claim 1, wherein: The inner coil turns of the same winding are most.

3. The novel single double-layer hybrid unequal-turn winding as claimed in claim 1 or 2, wherein: The maximum span is 1~τ+(q-2), wherein τ is pitch, and the minimum span is (q-1)~τ, wherein τ is pitch, and q is the number of slots per pole per phase and q≥3.

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