JP2005245091A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor wherein a base material constituting insulating paper is housed in thin paper and thus elusion of oligomer can be inexpensively suppressed. <P>SOLUTION: The motor is formed by placing the insulating paper 10 in the slots 4 in a stator core 2, and driving coils 5 are wound on the teeth of the stator core 2. The insulating paper 10 is so made that a base material 11 composed of polyethylene terephthalate is housed in the thin paper 12 composed of polyethylene terephthalate or polyphenylene sulfide. The insulating paper is so formed that a piece of thin paper 12 is folded into two and the base material 11 is sandwiched between the folded portions of the thin paper 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a motor in which insulating paper is disposed in a slot of a stator core and a drive coil is wound around a tooth portion of the stator core.

  Conventionally, a refrigerant compressor such as an air conditioner, a refrigerator, or a showcase is provided with a motor including a brushless DC motor or an AC induction motor. This motor is composed of a stator core, a rotor, and the like. A coil is wound around the stator core by direct winding, and a rotor is rotated by applying a voltage to the coil to operate a refrigerant compressor.

  In the stator core of the motor, a plurality of teeth are provided around the inner surface of the stator core at appropriate intervals, and a coil is directly wound around these teeth by, for example, a well-known coil direct winding device. However, when the coil is wound around the tooth portion of the stator core, the coil is damaged by the edge around the tooth portion. Therefore, in order to prevent the coil from being damaged, an insulating paper is interposed between the stator core and the coil to improve the reliability against the insulation failure of the coil (see Patent Document 1).

JP-A-8-237897

  In the refrigerant compressor using such a direct winding motor, when the current R22 refrigerant, R404, or 407 refrigerant is used, conventionally, the insulating effect is high as insulating paper, and polyethylene naphthalate (PEN) with little oligomer elution is used. Polyphenylene sulfide (PPS), or a different type of insulating paper such as PA61 or TNT bonded with an adhesive was used. However, these materials are expensive, and when an adhesive is used, the production cost and selection of the material for the adhesive have also been problems.

  The present invention has been made to solve the problems of the prior art, and in a motor in which an insulating paper is disposed in a slot of a stator core and a drive coil is wound around a tooth portion of the stator core, the insulation is provided. The objective is to suppress oligomer elution while reducing the cost of paper.

  That is, the motor of the present invention is formed by disposing insulating paper in the slots of the stator core and winding the drive coil around the teeth of the stator core, and the insulating paper is made of polyethylene terephthalate as a base material. It is characterized by being accommodated in a thin paper made of naphthalate or polyphenylene sulfide.

  The motor of the invention of claim 2 is characterized in that, in the above, the insulating paper is formed by folding the thin paper in half and sandwiching the base material in the thin paper.

  According to a third aspect of the present invention, in addition to the first aspect, the insulating paper is configured by wrapping the periphery of the substrate with thin paper.

  The motor according to a fourth aspect of the present invention is the motor according to the first, second, or third aspect, wherein the base material has a thickness of 0.180 mm or more and 0.190 mm or less, and the thin paper has a thickness of 0.010 mm or more. It is 0.030 mm or less.

  Further, the motor of the invention of claim 5 is characterized in that, in claim 4, the thickness of the base material is 0.188 mm and the thickness of the thin paper is 0.020 mm.

  In the present invention, in a motor in which insulating paper is disposed in a slot of a stator core and a drive coil is wound around the teeth of the stator core, a base material made of polyethylene terephthalate is placed in a thin paper made of polyethylene naphthalate or polyphenylene sulfide. Since the insulating paper is configured by housing, the elution of oligomers from the base material can be suppressed with the thin paper made of polyethylene naphthalate or polyphenylene sulfide while ensuring the predetermined strength with the base material made of polyethylene terephthalate. become.

  As a result, it is possible to reduce the cost of the insulating paper while ensuring the predetermined strength of the insulating paper and reducing oligomer elution when used in the refrigerant compressor, improving motor performance and cost. Both reductions can be realized.

  In the invention of claim 2, in the above, the insulating paper is constituted by folding the thin paper in half and sandwiching the base material in the thin paper, so that the production of the insulating paper becomes easy and the productivity is high. Become.

  In the invention of claim 3, since the insulating paper in the invention of claim 1 is configured by wrapping the periphery of the base material with thin paper, the oligomer elution from the base material can be effectively suppressed. .

  In the invention of claim 4, in each of the above inventions, the thickness of the substrate is 0.180 mm or more and 0.190 mm or less, and the thickness of the thin paper is 0.010 mm or more and 0.030 mm or less. Since the thickness of the paper is 0.188 mm and the thickness of the thin paper is 0.020 mm, the increase in the thickness of the insulating paper can be suppressed, and the oligomer elution suppression effect and the cost reduction effect can be maximized. It becomes like this.

  The feature of the present invention is that in order to suppress oligomer elution from the insulating paper that insulates between the stator core and the coil of the motor, the insulating paper is that the base material made of polyethylene terephthalate is accommodated in the thin paper made of polyethylene naphthalate or polyphenylene sulfide. It is in. Hereinafter, the embodiment will be described in detail.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an enlarged plan view of a stator core 2 of a direct-winding motor that is an example of the present invention. 1 is a partial plan view of a stator core 2 of a motor called direct winding or concentrated winding, FIG. 2 is a front view of the stator core 2, and 10 is a sheet-like insulating paper. The stator core 2 is a laminate of electromagnetic steel plates, and a plurality of teeth 3 are formed around the inner surface of the stator core 2 as shown in FIG.

  A slot 4 is formed inside the tooth portion 3 and the tooth portion 3, and a slot opening 4 A is formed between the tooth portion 3 and the tooth portion 3, and an insulating paper 10 ( 1 and 2 are attached. Six slots 4 are formed around the inner surface of the stator core 2, and insulating paper 10 is attached to each of the slots 4.

  The insulating paper 10 has a thickness of about 0.290 mm to 0.220 mm, which is approximately the same as that of conventionally used insulating paper. As will be described later, the insulating paper 10 has teeth 3 and teeth. It is bent and arranged along the inner surface with the part 3. That is, a plurality of teeth 3 are provided at equal intervals around the inner surface of the stator core 2, and the insulating paper is bent along the inner surface of the slot 4 formed between the teeth 3. 10 is arranged, and a later drive coil 5 to be described later is wound. The insulating paper 10 will be described in more detail later.

  FIG. 4 shows a stator core 2 of an AC induction motor, and this stator core 2 constitutes a motor with a rotor (not shown). 5 is a drive coil, 6 is a lead wire connected to the drive coil 5, 7 is a polyester yarn, and the polyester yarn 7 binds the end of the drive coil 5 (so-called coil end) and the lead wire 6. .

  Here, the insulating paper 10 is made of an insulating material having a predetermined strength that does not conduct electricity between the base material 11 and the thin paper 12. The substrate 11 is made of low-oligomer polyethylene terephthalate (PET. X10, M238, EM6-L.O), and the thin paper 12 is polyethylene naphthalate (PEN) or polyphenylene sulfide (PPS) with less oligomer elution. ). The substrate 11 has a thickness of 0.180 mm or more and 0.190 mm or less, preferably 0.188 mm. Further, the thickness of the thin paper 12 is 0.010 mm or more and 0.030 mm or less, preferably 0.020 mm.

  As shown in FIG. 5, the insulating paper 10 is formed by folding the thin paper 12 in half from the approximate center, and from the start end 12 </ b> A as one end and the end 12 </ b> B as the other end (opening edge) to the bottom portion 12 </ b> C. The base material 11 is inserted. That is, the insulating paper 10 is configured by inserting the base material 11 from the opening edge of the folded thin paper 12 to the inside and inserting the base material 11 to the bottom 12C of the thin paper 12. At this time, the base material 11 is configured to have a size that does not protrude from both ends (opening edges) of the folded thin paper 12 and the entire base material 11 including both sides of the opening edge is from the thin paper 12. Consists of dimensions that do not protrude. In addition, the thickness of the insulating paper 10 in which the base material 11 is sandwiched between the thin paper 12 folded in half is configured to be approximately the same as the thickness of the insulating paper conventionally used as described above.

  Thus, the insulating paper 10 containing the base material 11 in the thin paper 12 is bent into a shape as shown in FIGS. 6 and 7, inserted into the slot 4 from the bottom 12C, and into the slot 4 inner surface and the slot opening 4A. Be placed. At the end of the insulating paper 10 (in this case, the end of the insulating paper 10 refers to both ends in the direction orthogonal to the direction of the bottom 12C from the opening edge side formed between both ends 12A and 2B of the thin paper 12). An inclined portion 10A that is inclined with respect to the center line P between the portions 3 is formed. The inclined portion 10A is located in the slot opening 4A between the tooth portions 3 and the tooth portions 3, and the slot opening 4A. It is comprised so that it may closely_contact | adhere to a surface. 6 and 7 show the bent shape of the insulating paper 10, and the base material 11 and the thin paper 12 are not shown. Further, both end portions (both inclined portions 10A) of the insulating paper 10 are configured so as not to protrude from the slot opening 4A in a state where the insulating paper 10 is mounted in the slot 4 portion.

  Next, the assembly of the stator core 2 will be described. As shown in FIG. 7, the insulating paper 10 is folded so as to be folded at the folding center line P. In this case, it can be said that the bent center line P of the insulating paper 10 is a more appropriate expression than the bent center line P rather than being completely bent. And when all are bent, the insulating paper 10 will be in the shape shown in FIG. 6, FIG.

  When the insulating paper 10 folded in this way is attached to the slot 4 from the bottom 12C of the thin paper 12, the inclined portion 10A that is the end of the insulating paper 10 is located between the tooth 3 and the tooth 3 and is inclined. The portion 10A is in close contact with the slot opening 4A. At this time, since the insulating paper 10 is inserted from the bottom 12C of the thin paper 12, both ends 12A and 12B of the thin paper 12 can be inserted without being caught by the slot 4 and the slot opening 4A including the slot opening 4A. . That is, both ends 12A and 12B of the thin paper 12 do not get caught in the slot 4 including the slot opening 4A without fixing both ends 12A and 12B of the thin paper 12, so that the assembling workability of the stator core 2 is greatly improved. Can do.

  Then, after the drive coil 5 is wound around all the teeth 3 of the stator core 2 by direct winding by a known coil direct winding device, the lead wire 6 connected to the drive coil 5 is driven as shown in FIG. Together with the coil end at the top of the coil 5, it is bound with a polyester thread 7. Thereby, the assembly of the stator core 2 of the motor is completed. Incidentally, the drive coil 5 of the completed stator core 2 is worried about insulation failure due to a slack of the coil end or the lead wire 6 or a protrusion from the slot 4, but the lead wire 6 and the coil end are connected with a polyester yarn 7. They are bundled to prevent such slack and protrusion, and also prevent insulation failure.

  Thus, the insulating paper 10 is comprised by accommodating the base material 11 which consists of a polyethylene terephthalate in the thin paper 12 which consists of the polyethylene naphthalate or polyphenylene sulfide folded in half. As a result, it is possible to ensure a predetermined strength while suppressing the elution of oligomers from the base material 11 with the thin paper 12. Note that the thin paper 12 is folded in half and the base material 11 is sandwiched between them, but the thickness 12 of the base material 11 or the entire base material 11 protrudes from the thin paper 12 between both ends 12A and 12B of the thin paper 12 folded in half. Since it is configured in a size that does not, oligomer elution from the substrate 11 occurs only from a slight gap between the ends 12A and 12B of the thin paper 12 even when oligomer elution occurs from the substrate 11. Can be minimized. Therefore, there is almost no adverse effect on the motor by the oligomer eluted from the insulating paper 10, and the reliability of the refrigerant compressor can be improved.

  Next, FIG. 8 shows a longitudinal side view of the insulating paper 10 of another embodiment. The insulating paper 10 of the embodiment has substantially the same configuration as that of the above-described embodiment. Hereinafter, different parts will be described. Also, the same parts as those of the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted. In this case, the insulating paper 10 is composed of the base material 11 and the thin paper 12 as described above, but the method of attaching the thin paper 12 to the base material 11 is changed.

  That is, the insulating paper 10 is configured by wrapping the base material 11 with the thin paper 12. In this case, as shown in FIG. 8, the insulating paper 10 is configured by wrapping around the base material 11 with thin paper 12. Specifically, the length of the thin paper 12 is determined so that when the thin paper 12 is wound around the base material 11, the start end 12 </ b> A and the end end 12 </ b> B overlap each other by a predetermined dimension. Then, the thin paper 12 is wound around the base material 11 in a state where the starting end 12A of the thin paper 12 is positioned at the approximate center of the entire surface of the base material 11.

  Then, the end 12B of the thin paper 12 wound once is positioned on the stator core 2 surface side, and when the insulating paper 10 is attached to the slot 4 part and the slot 4 in a direction not to be caught in the slot 4, the insulating paper 10 The inclined portion 10 </ b> A that is an end portion is located between the tooth portions 3 and the tooth portions 3, and the inclined portion 10 </ b> A is in close contact with the slot 4. At this time, since the end 12B of the thin paper 12 of the insulating paper 10 is inserted in a direction not to be caught by the slot 4, the end 12B of the thin paper 12 can be inserted without being caught by the slot 4 including the slot opening 4A. it can. In addition, since the start end 12A and the end 12B of the thin paper 12 are polymerized by a predetermined size on the one surface side of the substrate 11, for example, even if the end 12B of the thin paper 12 is repelled by the elasticity of the thin paper 12, the start end 12A is repelled. Can be prevented.

  In this way, the insulating paper 10 is configured by wrapping the periphery of the base material 11 with the thin paper 12, and the starting end 12A and the terminal end 12B of the thin paper 12 are polymerized to a predetermined dimension on one surface side of the base material 11, so The elution of oligomers from the material 11 can be reliably and effectively suppressed. Further, since the overlapping portion of the start end 12A and the end 12B of the thin paper 12 is located on the stator core 2 surface side of the slot 4, it is possible to prevent inconvenience such as the end 12B of the thin paper 12 from popping. That is, since the end 12B of the thin paper 12 does not pop even if the both ends 12A and 12B of the thin paper 12 are not fixed, the assembling workability of the stator core 2 can be greatly improved.

  Then, after the drive coil 5 is wound around all the teeth 3 of the stator core 2 by direct winding by a known coil direct winding device, the lead wire 6 connected to the drive coil 5 is connected to the upper portion of the drive coil 5 as described above. The polyester ends 7 are bundled together with the coil ends. Thereby, the assembly of the stator core 2 of the motor is completed. Incidentally, the drive coil 5 of the completed stator core 2 has a concern about the insulation failure due to the coil end and the lead wire 6 slacking or the protrusion from the slot 4 as described above, but the lead wire 6 and the coil end are connected to the polyester yarn. If they are bundled at 7, it is possible to prevent such slack and protrusion, and to prevent insulation failure.

  As described above, since the insulating paper 10 is configured by wrapping the periphery of the base material 11 with the inexpensive thin paper 12, it is possible to prevent the cost of the insulating paper 10 from being increased, and from the base material 11 While the oligomer elution is suppressed by the thin paper 12, a predetermined strength can be secured by the base material 11. In addition, since the whole circumference | surroundings of the base material 11 are wrapped in the thin paper 12, especially the oligomer elution from the base material 11 can be suppressed effectively. Accordingly, there is almost no oligomer elution from the insulating paper 10, and the adverse effect on the motor is eliminated, and the reliability of the refrigerant compressor can be further improved.

  In the above embodiment, the insulating paper 10 is used for the induction motor. However, the present invention is effective when the insulating paper 10 is used not only for the induction motor but also for the brushless DC motor. Although the thin paper 12 is wound around the base material 11 once, the thin paper 12 is not only wound once around the base material 11 but may be wound once, half, twice, or twice or more. In this case, since only the end 12B of the thin paper 12 is not exposed on the surface of the base material 11, it is possible to prevent the start end 12A from repelling when the end 12B of the thin paper 12 is repelled. Assembling workability can be further improved.

  Further, in the embodiment, the direct winding motor has been described as an example, but the present invention is also effective for a distributed winding motor 100 as shown in FIG. That is, in this figure, 100 is a distributed winding motor, 30 is a stator, 40 is a rotor, 110 is a stator core, 5 is the aforementioned drive coil, 60 is a slot, and the drive coil 5 is distributed via the insulating paper 10. It is wound around the slot 60 by winding.

It is an enlarged plan view of the stator core of the direct-winding motor of one Example of this invention. It is a front view of the stator core of the direct winding motor of FIG. FIG. 2 is a plan view of a stator core (without a drive coil) of the direct-winding motor of FIG. 1. It is a top view of the stator core (with a drive coil) of the direct winding motor of FIG. It is a vertical side view of the insulating paper applied to the stator core of the direct winding motor of FIG. It is a top view of the insulating paper applied to the stator core of the direct winding motor of FIG. It is a front view of the insulating paper applied to the stator core of the direct winding motor of FIG. It is a vertical side view of the other insulating paper applied to the stator core of the direct winding motor of FIG. It is sectional drawing of the distributed winding type motor as another Example which can apply this invention.

Explanation of symbols

2 Stator Core 3 Tooth 4 Slot 4A Slot Opening 5 Drive Coil 10 Insulating Paper 10A Inclined Part 11 Base 12 Thin Paper 12A Start 12B End 12C Bottom

Claims (5)

In a motor in which insulating paper is disposed in a slot of the stator core and a drive coil is wound around the teeth of the stator core,
The motor is characterized in that the insulating paper is constituted by housing a base material made of polyethylene terephthalate in a thin paper made of polyethylene naphthalate or polyphenylene sulfide.   2. The motor according to claim 1, wherein the insulating paper is configured by folding the thin paper in half and sandwiching the base material in the thin paper.   2. The motor according to claim 1, wherein the insulating paper is configured by wrapping the periphery of the base material with the thin paper.   The thickness of the said base material is 0.180 mm or more and 0.190 mm or less, The thickness of the said thin paper is 0.010 mm or more and 0.030 mm or less, The claim 1, 2 or 3 characterized by the above-mentioned. Motor.   5. The motor according to claim 4, wherein the thickness of the base material is 0.188 mm, and the thickness of the thin paper is 0.020 mm.

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