Motor winding and wire embedding method

Abstract

The invention discloses a motor winding and a wire embedding method, the motor is provided with two groups of windings on each pole and each phase, the two groups of windings are connected in parallel, the two groups of windings are single-layer concentric windings, each group of single-layer concentric windings comprises two coils, and the two coils are distributed on adjacent different poles. According to the motor winding and the wire inserting method provided by the invention, the single-layer concentric windings arranged in each pole and each phase are arranged in a crossed and staggered manner, so that the type number of coils can be reduced, and after the windings of different poles are staggered, the windings of each pole and each phase are connected in parallel, so that the automatic wire inserting difficulty is greatly reduced, and automatic production is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of motor winding structures, and more specifically, to a motor winding. In addition, the present invention also relates to a wire embedding method suitable for the above winding. Background Art

[0002] The motor winding is an important part of the motor. The design of the winding must consider both the motor's performance indicators and the process feasibility of production and manufacturing. Definition: Q is the number of stator slots, p is the number of motor pole pairs, m is the number of motor phases, q=Q / (2*m*p) is the number of slots per pole per phase of the motor, and y is the average span of the two effective conductors of the winding coil (calculated in terms of the number of slots). When the q value is relatively large (for example, ≥6), the number of winding coils per pole per phase is relatively large, and it is more complicated to embed the winding into the motor core. Automated production is extremely difficult, and manual embedding is usually used, which has a relatively low production efficiency.

[0003] Among the existing technical solutions, patent CN210297382U discloses a cross-staggered concentric winding, but due to the use of double-layer windings and the series relationship between the two sets of windings, the automatic wire embedding process is still difficult. Patent CN202798230U discloses a double-layer cross-type concentric winding, but the double-layer winding still makes automatic wire embedding more difficult.

[0004] In summary, how to reduce the difficulty of automatic wire embedding of motor windings is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a motor winding, which can reduce the number of coil types by cross-staggering single-layer concentric windings. After the windings of different poles are staggered, the windings of each pole and each phase are connected in parallel, which greatly reduces the difficulty of automatic wire embedding and facilitates automated production.

[0006] Another object of the present invention is to provide a wire embedding method suitable for the above motor windings.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A motor winding, each pole and each phase of the motor includes two groups of windings, the two groups of windings are connected in parallel, both groups of windings are single-layer concentric windings, each group of single-layer concentric windings includes two coils, and the two coils are distributed on different adjacent poles.

[0009] Preferably, the spans of the two coils are 21 slots and 19 slots respectively.

[0010] Preferably, the two groups of windings are connected in parallel or in series.

[0011] A method for inserting wires in a motor winding is applicable to the above-mentioned motor winding, wherein the winding form of the motor is a single-layer concentric winding, the number of stator slots of the motor is 48 slots, the number of poles is 2 poles, the number of phases is 3 phases, the motor winding has a total of 12 coils, the number of coils in each group of the coils is 2, and the number of slots per pole and per phase of the motor is 8 slots. The specific method for inserting wires is:

[0012] The first coil is placed in the 1st slot and the 22nd slot, the second coil is placed in the 2nd slot and the 21st slot, the third coil is placed in the 3rd slot and the 24th slot, the fourth coil is placed in the 4th slot and the 23rd slot, the fifth coil is placed in the 9th slot and the 30th slot, the sixth coil is placed in the 10th slot and the 29th slot, the seventh coil is placed in the 11th slot and the 32nd slot, the eighth coil is placed in the 12th slot and the 31st slot, the ninth coil is placed in the 17th slot and the 38th slot, and so on; wherein the first coil and the second coil form a group of concentric winding coils, the third coil and the fourth coil form a group of concentric winding coils, the fifth coil and the sixth coil form a group of concentric winding coils, and the seventh coil and the eighth coil form a group of concentric winding coils.

[0013] The present invention provides a motor winding, in which each pole and each phase are provided with two groups of windings, the two groups of windings are arranged in parallel, both groups of windings are single-layer concentric windings, the two groups of windings are evenly arranged and correspond to the distribution of stator slots, the two groups of windings for each pole and each phase are cross-staggered, and the number of coil types can be reduced compared with the prior art, and the windings at different poles are staggered, and the two groups of windings for each pole and each phase are connected in parallel, the difficulty of automatic wire embedding is greatly reduced, and automated production is facilitated.

[0014] On this basis, the present invention provides a wire embedding method, which is suitable for a motor with 48 stator slots, 2 poles, 3 phases, a total of 12 coils in the motor winding, 2 coils in each group of coils, and 8 slots per pole and per phase. The wire embedding method can place multiple coils in the designated slots in sequence, the installation method is simple, and it is convenient for automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the circuit of the motor winding provided by the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the expanded A-phase winding. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The core of the present invention is to provide a motor winding, in which two sets of single-layer concentric windings per pole and per phase are arranged alternately, which can reduce the number of coil types, and the two sets of windings are arranged in parallel to reduce the difficulty of wire embedding and facilitate automated production.

[0020] Another core of the present invention is to provide a wire embedding method suitable for the above motor windings.

[0021] The present application provides a motor winding, in which each pole and each phase of the motor include two sets of windings, the two sets of windings are connected in parallel, both sets of windings are single-layer concentric windings, each set of single-layer concentric windings includes two coils, and the two coils are distributed on different adjacent poles.

[0022] For details, please refer to the attached Figure 1 With attached Figure 2 The motor includes three phases A, B, and C. Each pole and each phase is provided with two sets of windings. Both sets of windings are single-layer concentric windings. The single-layer concentric windings are composed of two coils with unequal pitches. For the two sets of windings for each pole and each phase, the two sets of windings are staggered and arranged in a cross-staggered manner. For detailed setting methods, please refer to the attached Figure 2 Taking the A-phase winding as an example, the two windings corresponding to A1 and A2 are installed in four slots numbered 1, 2, 3, and 4 respectively. The windings of each pole and each item are staggered and connected in parallel, which can reduce the difficulty of winding insertion and facilitate automated production.

[0023] Based on the above embodiment, the spans of the two coils are 21 slots and 19 slots respectively.

[0024] For details, please refer to the attached Figure 2In the two sets of windings for each pole and phase of the motor, each winding is a single-layer concentric winding, and the spans of the two coils in the winding are 21 slots and 19 slots. The two windings are cross-staggered, and the wiring of the stator winding can be achieved through the two coils. Generally, the prior art adopts double-layer cross-type concentric windings or four-layer concentric windings, that is, the motor winding wiring method of the present application can reduce the number of coil types: the present application only adopts two coils, the spans of the two coils are 21 and 19, and the average span is 20. Traditional windings generally use four coils with spans of 23, 21, 18, and 17, respectively. Although the average span is also 20, a winding mold is required for the manufacturing process of the coil, which makes the manufacturing of the coil more complicated. Furthermore, for traditional motors, the more coil types there are (that is, the larger the q value), the more valuable the wiring method of the motor winding of the present application is, and it is more conducive to the automated production of the motor stator winding.

[0025] Based on the above embodiments, the two groups of windings are connected in parallel or in series.

[0026] Specifically, when the two sets of windings for each pole and each phase of the motor are connected in parallel, it can be more convenient for automated production. For the motor windings of the present application, the connection method between the two sets of windings for each pole and each phase can also be in series, which is also compatible with manual wiring production.

[0027] In addition to the above motor winding, the present invention also provides a wire embedding method for the motor winding disclosed in the above embodiment, and the motor used in the wire embedding method has the following parameters: the winding form of the motor is a single-layer concentric winding, the number of stator slots of the motor is 48 slots, the number of poles is 2 poles, the number of phases is 3 phases, the motor winding has a total of 12 coils, the number of coils in each group of coils is 2, and the number of slots per pole and per phase of the motor is 8 slots;

[0028] The specific embedding method is:

[0029] The first coil is placed in the 1st slot and the 22nd slot, the second coil is placed in the 2nd slot and the 21st slot, the third coil is placed in the 3rd slot and the 24th slot, the fourth coil is placed in the 4th slot and the 23rd slot, the fifth coil is placed in the 9th slot and the 30th slot, the sixth coil is placed in the 10th slot and the 29th slot, the seventh coil is placed in the 11th slot and the 32nd slot, the eighth coil is placed in the 12th slot and the 31st slot, the ninth coil is placed in the 17th slot and the 38th slot, and so on; wherein, the first coil and the second coil form a group of concentric winding coils, the third coil and the fourth coil form a group of concentric winding coils, the fifth coil and the sixth coil form a group of concentric winding coils, and the seventh coil and the eighth coil form a group of concentric winding coils.

[0030] Specifically, combined with Figure 1 With attached Figure 2 , the first to fourth coils are placed according to the aforementioned method, the first coil and the second coil form a group of windings, the third coil and the fourth coil form a group of windings, the two groups of windings can be connected in series or in parallel, automated production is generally used for parallel connection, and manual production is generally used for series connection, the span of the first coil, the third coil, the fifth coil and the seventh coil is 21, the span of the second coil, the fourth coil, the sixth coil and the eighth coil is 19, and wiring can be achieved by selecting only two types of coils. This wiring method is suitable for a motor with 48 stator slots, 2 poles, 3 phases, a total of 12 coils in the motor winding, 2 coils in each group of coils, and 8 slots per pole and per phase of the motor, but it is not limited to this motor. After the number of stator slots of the motor increases, it can also be wired according to this wiring method, and as described in the aforementioned content, the larger the q value, the more valuable the wiring method of the motor winding of the present application can be.

[0031] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0032] The above is a detailed introduction to a motor winding and wire embedding method provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A motor winding, characterized in that: Each pole and each phase of the motor includes two groups of windings, and the two groups of windings are connected in parallel. Both groups of windings are single-layer concentric windings, and each group of single-layer concentric windings includes two coils, and the two coils are distributed on different adjacent poles.

2. The motor winding according to claim 1, characterized in that: The spans of the two coils are 21 slots and 19 slots respectively.

3. The motor winding according to claim 2, characterized in that: The two groups of windings are connected in parallel or in series.

4. A method for inserting wires into a motor winding, applicable to the motor winding according to claim 3, characterized in that: The winding form of the motor is a single-layer concentric winding, the number of stator slots of the motor is 48 slots, the number of poles is 2 poles, the number of phases is 3 phases, the motor winding has a total of 12 coils, the number of coils in each group of the coils is 2, the number of slots per pole and per phase of the motor is 8 slots, and the specific wire embedding method is: The first coil is placed in the 1st slot and the 22nd slot, the second coil is placed in the 2nd slot and the 21st slot, the third coil is placed in the 3rd slot and the 24th slot, the fourth coil is placed in the 4th slot and the 23rd slot, the fifth coil is placed in the 9th slot and the 30th slot, the sixth coil is placed in the 10th slot and the 29th slot, the seventh coil is placed in the 11th slot and the 32nd slot, the eighth coil is placed in the 12th slot and the 31st slot, the ninth coil is placed in the 17th slot and the 38th slot, and so on; wherein the first coil and the second coil form a group of concentric winding coils, the third coil and the fourth coil form a group of concentric winding coils, the fifth coil and the sixth coil form a group of concentric winding coils, and the seventh coil and the eighth coil form a group of concentric winding coils.

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