Sectional winding structure

Abstract

The invention discloses a sectional type winding structure which comprises a stator yoke part, a plurality of T-shaped tooth parts are arranged on the stator yoke part, wire grooves are formed among the T-shaped tooth parts, windings are arranged in the wire grooves, and the windings are wound on the T-shaped tooth parts. Each T-shaped tooth portion is provided with at least two independent windings, most iron core grooves are in a wooden club shape and are also trapezoidal, and each independent winding can be wound by wires with different wire diameters and different shapes, so that the overcurrent area of the armature can be increased, the stator groove fullness rate can be maximized, and the stator efficiency can be improved. And the requirement that the ultra-high-speed motor needs extremely few winding turns can be met, different windings can be connected in parallel, or connected in series, or connected in series and in parallel, and the winding process and structure are optimal.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and specifically to a segmented winding structure. Background Art

[0002] The stator of a motor is one of the key components of the motor. For high-power and high-speed permanent magnet synchronous motors, a rotating magnetic pole structure is adopted, with the main magnetic poles installed on the rotor and the exciting armature installed on the stator. Since the current density of the exciting armature on the stator of high-power and high-speed motors is large while the back electromotive force is low, the winding structure form on the stator magnetic poles is particularly important. Currently on the market, the stator magnetic poles of high-power and high-speed motors are usually wound with multi-strand wire windings. Since the multi-strand wire windings cannot be arranged regularly and are in a staggered and overlapping form in the stator slots, the occupied space in the stator slots is relatively large. Also, since the wire diameter of the enameled wires of the multi-strand enameled wires is relatively thin, the cross-sectional area ratio of the wire insulation layer to the wire body is also relatively high. Therefore, the slot fill factor of the stator slots with multi-strand wire windings is very low. With the development of technology, in order to improve the deficiencies of the stator windings, in recent years, stator windings with single wires arranged regularly have emerged. However, since the wire diameter of most single wires is smaller than the stator slot opening, the current-carrying area of the single wire is small, and multiple windings with equal number of turns must be connected in parallel. The known relatively advanced winding form is to wind in two or more layers on the stator teeth, and each layer of winding is an independent winding, and then connected in parallel finally to achieve the dual purposes of increasing the armature current density and raising the motor speed. Although this method solves the problem of insufficient slot fill factor of multi-strand wire windings, even so, its disadvantages are relatively obvious. First of all, the windings arranged regularly in layers cannot meet the speed requirements of ultra-high-speed motors because the back electromotive force of ultra-high-speed motors is relatively low, the number of winding turns is small, and the current density of a single-turn winding is large. The windings arranged regularly in layers are greatly restricted by the stator slot shape dimensions and cannot achieve a very small number of winding turns. Secondly, the windings arranged regularly in layers are wound with wires of a unified wire diameter and cannot be regularly filled in the rod-shaped or trapezoidal stator slots, resulting in a low slot fill factor and not achieving the ultimate utilization rate of the stator. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a segmented winding structure, which solves the problems that when winding double-layer or multi-layer windings on the outer teeth of the existing motor stator, it is easy to have the situation that the stator wire slots cannot be filled, resulting in a low slot fill factor, and the problem that the number of turns of the armature winding of ultra-high-speed motors is even less.

[0004] To achieve the above purposes, the present invention is realized through the following technical solutions: A segmented winding structure includes a stator yoke, and a plurality of T-shaped tooth parts are provided on the stator yoke. Slots are provided between the plurality of T-shaped tooth parts, and windings are provided in the slots and are wound around the T-shaped tooth parts.

[0005] Preferably, the winding further includes an upper winding and a lower winding, and the upper winding and the lower winding are both wound on the T-shaped tooth portion.

[0006] Preferably, the number of the windings is several.

[0007] Beneficial Effects

[0008] The present invention provides a segmented winding structure, which has the following beneficial effects:

[0009] 1. Wrap the windings in sections on the T-teeth on the stator yoke. Each T-teeth has at least two independent winding coils. Because most of the core slots are mallet-shaped, also called trapezoidal, and each independent winding can be wound with different wire diameters, it can not only increase the armature's overcurrent area, but also maximize the stator slot fill rate. Different windings can be connected in parallel, in series, or in a combination of series and parallel. Such winding technology and structure are optimal and have reached the extreme. It not only greatly improves the motor's slot fill rate, but also can achieve the low-turn winding requirements of ultra-high-speed motors.

[0010] 2. Since each winding in the segmented winding is relatively independent, the insulation performance between each winding is much better than that of conventional windings, which can greatly improve the inter-turn insulation level of the motor armature, and is particularly suitable for ultra-high voltage motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partially enlarged schematic diagram of the double-layer winding structure of the prior art.

[0012] Figure 2 It is a partially enlarged schematic diagram of the stator yoke, T-shaped teeth and windings in the slots of the present invention.

[0013] Figure 2 Middle: 1. Stator yoke; 2. T-shaped teeth; 3. Lower winding; 4. Upper winding; 5. Wire slot.

[0014] Figure 3 It is a partial enlarged schematic diagram of the stator yoke and T-shaped teeth and the flat windings used in the slots of the present invention. DETAILED DESCRIPTION

[0015] 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.

[0016] See also Figure 1, the present invention provides a technical solution: a segmented winding structure, including a stator yoke 1, on the outer wall of the stator yoke 1, there are provided a number of T-shaped tooth portions 2, between a number of the T-shaped tooth portions 2, there are provided slot grooves 5, in the slot grooves 5, there are windings, and the windings are wound around the T-shaped tooth portions 2;

[0017] The slot grooves between the T-shaped tooth portions 2 are club-shaped, also called trapezoidal. By means of segmentation, coils with different wire diameters can be wound, and the wire diameter of the winding can be adjusted according to the space size in the slot to achieve the maximization of the slot fill factor. They can be freely combined into a series relationship, a parallel relationship, or a series-parallel combination to meet the motor specifications with different speeds and different powers.

[0018] Further, the winding further includes an upper-segment winding 4 and a lower-segment winding 3, and both the upper-segment winding 4 and the lower-segment winding 3 are wound around the T-shaped tooth portions 2;

[0019] In this design, the winding wound around the T-shaped tooth portions 2 is in a segmented form, so at least two independent windings are wound on each T-shaped tooth portion 2.

[0020] Further, the number of the windings is a number; the cross-sectional shape of the winding conductor can be circular, flat, or rectangular.

[0021] Through those skilled in the art, the windings in this case are connected according to the circuit requirements. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0022] Embodiment: When in use, the coil windings are wound around the T-shaped tooth portions 2 in a segmented manner. At least two independent windings are wound on each T-shaped tooth portion 2. Since most iron core slots are club-shaped, also called trapezoidal, each independent winding can be wound with wires of different wire diameters, which can not only increase the current-carrying area of the armature, but also maximize the stator slot fill factor. The different windings can be in a parallel relationship, a series relationship, or can also meet the requirement of extremely few winding turns for a super-high-speed motor.

[0023] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0024] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A segmented winding structure, comprising a stator yoke (1), characterized in that, A plurality of T-shaped tooth portions (2) are provided on the stator yoke portion (1), a slot (5) is provided between each of the plurality of T-shaped tooth portions (2), a winding is provided in the slot (5), and the winding is wound around the T-shaped tooth portion (2).

2. The segmented winding structure according to claim 1, wherein The winding further includes an upper winding portion (4) and a lower winding portion (3), and both the upper winding portion (4) and the lower winding portion (3) are wound around the T-shaped tooth portion (2).

3. A segmented winding structure according to claim 1, characterized in that, The number of the windings is plural.

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