JPH10201187A - Coil assembling method of switched reluctance motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce copper loss to a minimum, realize high efficiency, and enable miniaturization, by laminating, collecting and assembling split coils wherein the winding part of wire material constituting each coil on the stator side is divided into a plurality of parts, and electrically connecting each of the terminals of the split coils. SOLUTION: A plurality of split coils 3A, 3B, 3C which are laterally symmetric are laminated and arranged on the teeth (cores) 2 turning to the respective poles on the stator 1 side. Each of the split coils is formed in a block type (rectangular section) by winding wire material like a copper wire. Each of the block type coils is inserted into the core 2, pressed and bent in the direction along the inner peripheral surface of the stator 1, and worked in a fan type. In order that a gap may not be generated in the fan type space, the split coils are efficiently arranged. End portions led out from the respective split coils 3 are connected in series or in parallel. Thereby a small-sized coil of large capacity wherein copper loss is small and efficiency is high can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention has a large output,
In addition, the present invention relates to a switched reluctance motor which has a feature of having a long durability time and is suitable for application to various fields such as an electric vehicle, an electric bicycle, a crane, and an electric vacuum cleaner, and is particularly mounted as a coil on the stator side. The present invention relates to a method for assembling a coil of a switched reluctance motor.

[0002]

2. Description of the Related Art This reluctance motor is, for example, shown in FIG.
As shown in FIG. 2, a rotor (not shown) having an outwardly projecting protrusion on the inside and a stator 100 having an inwardly projecting magnetic pole surrounding the rotor are arranged outside the rotor. A coil 101 formed by winding an appropriate winding is attached to each convex (magnetic pole) portion 100A on the stator 100 side.

[0003]

Usually, the coil 101 formed on the convex portion is installed in a substantially fan-shaped slot (space) provided between the adjacent convex portion, and therefore, the coil 101 on the side closer to the center is adjacent to the adjacent convex portion. The coil approaches, but conversely, a large slot (space) is formed between the coil and the adjacent coil on the outer side far from the center, so the winding space factor does not rise as expected, This is one of the obstacles to miniaturization as copper loss increases.

[0004] In view of the above circumstances, the present invention realizes a highly efficient motor in which the loss of copper loss is suppressed as much as possible, particularly in an inner rotor system, and is suitable for a miniaturized switched reluctance motor. It is an object of the present invention to provide a coil assembling method.

[0005]

That is, according to the first aspect of the present invention, there is provided a rotor having a plurality of outwardly convex protrusions,
In a switched reluctance motor provided to surround the rotor from the outside and having a stator having a plurality of coils attached to an inwardly projecting magnetic pole portion, a winding portion of a wire constituting each coil on the stator side is provided. A plurality of divided coils are stacked and assembled to assemble, and each terminal of each divided coil is electrically connected.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a main part of a switched reluctance motor (SR motor) according to the present invention, that is, a main part of a stator 2 which is a convex magnetic pole of a stator 1. Taste (iron core) serving as each magnetic pole on the stator 2 side in this embodiment
A plurality of symmetrical split coils 3 (in this embodiment, three splits into a first coil 3A, a second coil 3B, and a third coil 3C) are stacked and arranged on 2.

[0007] Each split coil 3A to 3C of this embodiment
As shown in FIG. 2, an appropriate wire material 30 such as a copper wire is wound and divided into a plurality of blocks (rectangular cross-sections) in advance to form a plurality of wires. Tace (iron core)
After insertion into the stator 2, for example, as shown in FIG. 3, it is processed into an appropriate fan shape by pressing and bending in a (specific) direction along the inner peripheral surface 1 </ b> A of the stator 1. Thereby, the split coils can be efficiently arranged so that no gap is generated in the fan-shaped slots (spaces) between the tastes (iron cores) 2.

The specific method of inserting each split coil is as follows. After inserting all the first coils into the respective tastes (iron cores) 2 serving as the respective magnetic poles and processing them into a fan shape, all the second coils are inserted. Insert into each taste (iron core) 2,
The same processing is performed. Finally, if all the third coils are inserted into the respective tastes (iron cores) 2 and the same processing is performed, the fan-shaped slots between the tastes (iron cores) 2 are efficiently divided so that no gap is generated. The coil can be inserted and arranged. In this case, the split coils are integrally fixed to each taste (iron core) with an appropriate adhesive or the like.

The relationship between the sizes of these split coils is as follows. The first coil 3A, the second coil 3B, and the third coil 3C have widths on one side of x1 to x3, respectively.
Assuming that the depth dimension is y1 to y3, x1 · y1 = x2
Y2 = x3 · y3. That is, in this case, since x1>x2> x3,
It is necessary to satisfy y3>y2> y1, whereby it is necessary to increase the depth of the split coil closer to the center. However, the dimensions in the thickness direction were the same.

In addition, each split coil of this embodiment may be formed into a fan shape by winding it around using an appropriate jig. The number of divisions of the coil can be appropriately determined according to the capacity of the motor, and may be any number as long as the coil is divided into a plurality.

Further, in each split coil 3 of this embodiment,
In order to electrically connect these coils, for example, FIG.
As shown in FIG. 5, the ends drawn from the respective divided coils are connected in series. In particular, they are connected in parallel as shown in FIG. ? In other words, it is possible to easily realize a motor having a small number of coils, in other words, a motor capable of flowing a large current and achieving a large capacity.

[0012]

As described above, according to the present invention, in a switched reluctance motor, divided coils obtained by dividing a winding portion of a wire constituting each magnetic pole coil on a stator side into a plurality of segments are stacked and assembled. It is made by assembling and electrically connecting each terminal of each split coil, in other words, each split coil can be formed in another wide working place in advance, so that it is relatively narrow. Even in the case of insertion into a slot (space), a coil having a shape corresponding to the slot (space) can be reliably provided, so that a small, large-capacity, and efficient motor with small copper loss can be provided. There is an effect that can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a stator side of an SR motor according to the present invention.

FIG. 2 is a perspective view showing an inserted state of a coil of the motor.

FIG. 3 is an explanatory view showing an assembled state of the coil.

FIG. 4 is an explanatory diagram showing a connection state of the coil.

FIG. 5 is an explanatory view showing another connection state of the coil.

FIG. 6 is a schematic view of a main part showing a state in which coils of a conventional SR motor are arranged.

[Explanation of symbols]

 1 stator 2 taste (iron core) 3 split coil

Claims (1)

[Claims] 1. A switched reluctance motor comprising: a rotor having a plurality of outwardly projecting protrusions; and a stator provided to surround the rotor from the outside and having a plurality of coils attached to an inwardly projecting magnetic pole portion. In the above, the winding part of the wire constituting each coil on the stator side is assembled by stacking and assembling split coils in which a plurality of split coils are split, and electrically connecting each terminal of each split coil. A method for assembling a coil of a switched reluctance motor.