JP2010148170A - Gap winding motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gap winding motor wherein reduction of hours of winding work, enhancement of reliability, reduction of a cost, and the like are enabled. <P>SOLUTION: A spacer 14 in which a connecting wire 11 of an air-core coil 10 wound with a single continuous stroke is housed is placed between both split cores 1a, 1b obtained by dividing a stator core 1 into two in the direction of the motor axis. The spacer 14 includes a holding hole 15 in which the connecting wire 11 of the air-core coil 10 is housed. A cut 16 widened from the holding hole 15 to an end portion is provided so that the spacer 14 is inserted into the connecting wire 11 after winding work. In case of polyphase coil, a number of the spacers 14 equivalent to the number of phases are stacked in the axial direction and placed so that they are offset in the circumferential direction. Thus the spacer includes functions of positioning and insulating the overlapping connecting wires 11 in addition to the functions of spacer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gap winding motor having a stator coil using a one-stroke coil and an insulating spacer. In particular, the present invention relates to a processing structure of a coil terminal.

In recent years, in order to eliminate the coil winding connection work and improve the motor assembly work efficiency, the coil winding work is performed with a single stroke (see, for example, Patent Document 1).
The conventional terminal processing structure of a gap winding motor using a one-stroke coil is as shown in FIGS. 8, 9, and 10. FIG. 8 is a side sectional view showing the shape of a stator of a gap winding motor subjected to conventional coil terminal processing, FIG. 9 is a partially enlarged view of the coil terminal processing portion, and FIG. 10 is subjected to one stroke winding. It is an expanded view of an air-core coil.
8 to 10, 1a and 1b are axially divided stator cores, 2a and 2b are coil terminals, 10 is an air-core coil wound with one stroke, 11 is a crossover of the air-core coil, and 14 is A spacer 17 is a gap between the stator cores 1a and 1b.
The stator S includes stator cores 1a and 1b formed by stacking silicon steel plates into a cylindrical shape, and thin insulation provided on the inner peripheral surfaces of the stator cores 1a and 1b to ensure a required withstand voltage. An armature winding is formed by winding the air-core coil 10 for forming a rotating magnetic field at equal intervals through a layer. The armature winding is molded or impregnated with resin, and is fixed integrally with the stator cores 1a and 1b.
The rotor R is arranged concentrically with the stator S via a magnetic air gap, and is provided on the shaft 4 and the outer peripheral surface of the shaft 4, and a plurality of magnetic poles having different polarities alternately. For example, a rare earth permanent magnet 3 divided into an arc shape is provided. Said
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The rotor R is rotatably supported between the stator S via load side and anti-load side bearings 7 and 8.
In the terminal processing of the air-core coil 10 of the stator S, a spacer 14 is arranged between the two split cores 1a and 1b of the stator core divided into two in the motor axial direction, and a predetermined stator core gap 17 is provided. The crossover wire 11 of the air-core coil 10 is arranged in the stator inter-core gap 17, and at the same time, neutral point connection is performed.
At this time, an insulating tube 12 is inserted into the crossover wire 11 and the neutral point connection portion to obtain insulation between the coils. Further, a mold is applied so as to fill the gap 17 between the stator cores to improve the fixing strength of the two split coils 1a and 1b, thereby improving coil insulation and suppressing coil vibration due to current.
JP 2007-159331 A

In the conventional one-winding air core coil terminal processing structure, an insulating tube is inserted into the jumper wire to obtain insulation between the coils. However, when an O-shaped tube is used, an insulating property is obtained. The tube had to be inserted in the winding process, and there was a problem that the winding work time increased and the cost increased. In addition, when the C-shaped tube is used, it is not continuously connected 360 ° with respect to the circumferential direction, so in some cases, the coil is exposed, and a short circuit between the coils and the coil and structure There was a problem related to reliability, such as a short circuit.
The present invention has been made in view of such problems, and an object of the present invention is to provide a gap winding motor capable of shortening winding work time, improving reliability, and reducing costs. Is.

In order to solve the above problems, the present invention is configured as follows.
According to a first aspect of the present invention, there is provided an armature in which a stator core and a plurality of air-core coils for forming a rotating magnetic field are disposed on either the inner peripheral surface or the outer peripheral surface of the stator core. A stator having windings, and a rotor facing the stator via a magnetic gap, and the stator core has a height within a range of an air core length of the air core-shaped coil. Each of the terminals is divided into a plurality of air-core-shaped coils, each of which has a single-winding winding formed in each gap, in the space between the divided stator cores. However, in the gap winding motor in which each phase is connected to each other by a jumper and the distance of the gap is kept constant by a spacer, the spacer disposed in the gap is in a direction parallel to the jumper It has a holding hole for the connecting wire that follows, from the holding hole It has a notch portion extending towards the parts and is characterized in that a said connecting wire in the notches.
The invention described in claim 2 is characterized in that the spacer is divided in the circumferential direction by the same number as the number of coils.
The invention described in claim 3 is characterized in that the spacers are overlapped in the axial direction by a corresponding amount.
The invention according to claim 4 is characterized in that the spacer position for each phase of the spacer is offset in the circumferential direction with respect to the direction of the connecting wire.

According to the first aspect of the present invention, the insulating tube can be abolished by giving the spacer the insulating effect of the connecting wire of the one-stroke coil. Accordingly, it is possible to provide a gap winding motor capable of shortening the winding work time, improving the reliability, and reducing the cost.
According to the second to fourth aspects of the present invention, the insulation between the coil and the coil or the coil and the structure can be obtained in each phase even in the continuous and overlapping one-stroke coil, and the reliability is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing a gap winding motor in a first embodiment of the present invention. FIG. 2 is an enlarged side view of the electromagnetic part of the gap winding motor of FIG. FIG. 3 is a side view showing the spacer in the first embodiment of the present invention. FIG. 4 is a front view showing the spacer in the first embodiment of the present invention. FIG. 5 is a perspective view showing an assembly of spacers in the first embodiment of the present invention, and shows the spacers arranged for the purpose of insulating the jumper wires of a single-winding air core coil. In this embodiment, an example of an inner rotor type gap winding motor having 20 poles and 15 coils is shown. Note that the description of the same constituent elements of the present invention as those of the prior art is omitted, and only different points will be described.

The present invention is different from the prior art as follows.
In other words, a spacer 14 is also provided between the two split cores 1a and 1b of the stator core that is divided into two in the axial direction of the motor. The spacer 14 is divided into the same number as the coil in the circumferential direction, and further has a holding hole 15 for the crossover wire 11 in the circumferential direction, and the crossover wire 11 is disposed in the holding hole 15 for insulation. The structure is gained. In addition, since the holding hole 15 has a notch 16 for inserting a connecting wire that extends toward the end, the connecting wire 11 can be easily inserted. As shown in FIG. 6, each spacer 14 is overlapped by three phases in the axial direction and is offset by a certain amount in the circumferential direction to form a plurality of shapes as shown in FIG. At this time, an inter-spacer gap 18 is provided by offset. By connecting them, the crossover wire 11 of the one-stroke coil has a structure in which insulation is ensured even when it overlaps continuously like a three-phase coil.
Further, when the coil neutral point 13 is disposed in the gap 17 between the two split cores 1a and 1b, the gap for connection is created by adjusting the spacer length in the vicinity of the neutral point. Point connection processing is possible. Further, in the case of performing molding with resin or the like for the purpose of improving coil insulation, the holding hole 15 for the crossover wire 11 provided in the spacer 14 from the inter-spacer gap 18 by providing the inter-spacer gap 18, Since the resin is filled in the notch 16 for inserting the crossover, a more stable insulating structure can be obtained.

It is a sectional side view which shows the gap winding motor in 1st Example of this invention. It is the side view to which the electromagnetic part of the gap winding motor of FIG. 1 was expanded. It is a side view which shows the spacer in 1st Example of this invention. It is a front view which shows the spacer in 1st Example of this invention. It is a perspective view which shows the assembly of the spacer in 1st Example of this invention. It is an expanded view which shows the spacer assembly in 1st Example of this invention. It is an expanded view which shows the coil terminal process in 1st Example of this invention. It is side sectional drawing which shows the gap winding motor in a prior art. 8 is an enlarged side view of the electromagnetic part of the gap winding motor. It is an expanded view which shows the coil terminal process in a prior art.

Explanation of symbols

1a split core 1b split core 2a coil end 2b coil end 3 permanent magnet 4 shaft 5 load side bracket 6 anti load side bracket 7 load side bearing 8 anti load side bearing 9 frame 10 air core coil 11 crossover wire 12 insulating tube 13 coil Neutral point 14 Spacer 15 Holding hole 16 Notch 17 Gap 18 Gap between spacers S Stator R Rotor

Claims (4)

A stator comprising: a stator core; and an armature winding formed by arranging a plurality of air-core-shaped coils for forming a rotating magnetic field on either the inner peripheral surface or the outer peripheral surface of the stator core; ,
A rotor opposed to the stator via a magnetic gap, and the stator core is divided in a height direction within a range of an air core length of the air core-shaped coil, and the divided In the gap between the stator cores, a plurality of the air-core coils formed by forming one-stroke windings in each phase are arranged, and each terminal is connected to each other by a crossover wire. In a gap winding motor that is connected and maintains a constant distance of the gap by a spacer,
The spacer disposed in the gap has a crossover holding hole that continues in a direction parallel to the crossover, has a cutout extending from the holding hole toward the end, and the cutout Gap winding motor with crossover wires.   The gap winding motor according to claim 1, wherein the spacer is divided in the circumferential direction by the same number as the number of coils.   The gap winding motor according to claim 1, wherein the spacers are overlapped with each other in the axial direction.   The gap winding motor according to claim 1, wherein the spacer position for each phase of the spacer is offset in the circumferential direction with respect to the direction of the connecting wire.

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