JP2007068298A - Insulating winding protector, and method of magnetization using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insulating winding protector that prevents the following from occurring when a magnetic material inserted into a rotor is magnetized: a winding is deformed by a large current passing through the winding, and impact is applied to between it and an adjoining winding in a different phase and the coating on the windings is destroyed to cause short-circuiting, and a magnetization method for magnetizing a magnetic material inserted into a rotor using this protector. <P>SOLUTION: The protector 40 is used to magnetize the magnetic material 30 of an electromotive element 2 including: a stator 4 having multiple teeth 4C and windings 4B concentratedly wound on the teeth 4C; and a rotor 5 that is rotatably fixed and held on a rotating shaft 6 concentrically with the stator 4 inside the stator 4 with a predetermined gap in-between. The rotor is formed by inserting the magnetic material 30 into a laminated body 5A obtained by laminating electromagnetic steel plates. The protector has a required number of legs 41 that can be inserted into between adjacent windings 4B by a predetermined length. A fixing portion 42 for fixing and supporting the legs 41 is formed integrally with the legs 41. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an insulative winding protector and a magnetizing method using the same, and more specifically, by energizing a winding wound in a concentrated winding manner on a plurality of teeth portions of a stator, When magnetizing a magnetic material inserted in a laminated body of magnetic steel sheets, the winding is deformed by a large current flowing in the winding, and an impact is applied between adjacent different-phase windings, destroying the coating of the winding. The present invention relates to an insulative winding protector for preventing occurrence of a short circuit and a magnetizing method using the same.

FIG. 4 is a cross-sectional explanatory view of the electric element.
As shown in FIG. 4, the stator 4 includes a laminated body 4A in which doughnut-shaped electromagnetic steel sheets are laminated, and six teeth portions (tooth portions) 4C provided in the laminated body 4A. It has a three-phase winding 4B (4B-U1, 4B-V1, 4B-W1, 4B-U2, 4B-V2, 4B-W2) directly wound by a concentrated winding method via a plastic insulator 20 (For example, refer to Patent Document 1).
The electric element 2 includes the stator 4 and a rotor 5 inserted and installed inside the stator 4 at a predetermined interval. The rotor 5 is fixed to a rotating shaft 6 that extends in the vertical direction through the center. The rotor 5 is formed of a laminated body 5A of electromagnetic steel sheets, like the stator 4, and a magnetic material 30 such as rare earth or ferrite is inserted into the laminated body 5A, and a large current is applied to the winding 4B of the stator 4. Is energized for a short time, and the magnetic material 30 is magnetized.
JP 2002-142416 A

  However, when the magnetic material 30 is magnetized, the winding is deformed by a large current flowing through the winding, an impact is applied between the adjacent windings 4B of different phases, the coating of the winding is broken, and a short circuit occurs. And there was a problem that the insulation was broken.

The first object of the present invention is to solve the conventional problems, and when magnetizing a magnetic material inserted in a rotor, the winding is deformed by a large current flowing in the winding, and the adjacent windings of different phases It is to provide an insulating winding protector to prevent a shock from being applied and the film of the winding being destroyed and causing a short circuit,
A second object of the present invention is to provide a magnetization method for easily magnetizing a magnetic material inserted into a rotor using the insulating winding protector.

An insulating winding protector according to claim 1 of the present invention for solving the above-mentioned problems is a stator having a plurality of teeth portions and windings wound around the teeth portions by a concentrated winding method, An electric element comprising a rotor formed by inserting a magnetic material into a laminated body in which magnetic steel sheets are laminated, which is fixed to a rotating shaft concentrically with a stator and is rotatably held with a predetermined interval inside. An insulating winding protector used when magnetizing the magnetic material of
The winding protector includes a necessary number of legs that can be inserted between adjacent windings by a predetermined length, and a fixing portion for fixing and supporting the legs is formed integrally with the legs. It is characterized by.

The insulating winding protector according to claim 2 of the present invention is the insulating winding protector according to claim 1,
When the total length of the winding is H and the insertion length when the leg is inserted between the windings is L, the leg is set so that H and L satisfy the relationship represented by the following formula (1). Is formed.
(1/2) H ≦ L Formula (1)

According to a third aspect of the present invention, there is provided a stator having a plurality of teeth portions and windings wound around the teeth portions by a concentrated winding method, and a predetermined interval is provided inside the stator, When magnetizing the magnetic material of the electric element provided with a rotor formed by inserting a magnetic material into a laminated body in which magnetic steel sheets are laminated, being concentrically fixed to a rotating shaft and rotatably held,
Insulating winding protectors having a necessary number of legs that can be inserted between the adjacent windings, and a fixing portion for fixing and supporting the legs are formed integrally with the legs. The magnetizing method is characterized in that the leg is inserted between the adjacent windings for a predetermined length and fixed, and then the winding is energized to magnetize the magnetic material.

According to a first aspect of the present invention, there is provided an insulative winding protector comprising a plurality of teeth portions and a stator having windings wound around the teeth portions by a concentrated winding method, and a predetermined interval inside the stator. The magnetic material of the electric element including the rotor fixed to the rotating shaft concentrically with the stator and rotatably held and having a rotor formed by inserting a magnetic material into a laminated body in which electromagnetic steel plates are laminated is magnetized. Insulating winding protector used when
The winding protector includes a necessary number of legs that can be inserted between adjacent windings by a predetermined length, and a fixing portion for fixing and supporting the legs is formed integrally with the legs. It is characterized by that,
Used when magnetizing the magnetic material inserted into the rotor, the leg is inserted between the adjacent different-phase windings for a predetermined length, fixed, and then energized to the winding to flow into the winding. Since it is possible to prevent a winding from being deformed due to a large current and an impact between the adjacent windings of different phases to break the coating of the winding, no short circuit occurs between adjacent windings of different phases. There is a remarkable effect that the magnetic material can be easily magnetized.

The insulating winding protector according to claim 2 of the present invention is the insulating winding protector according to claim 1,
When the total length of the winding is H and the insertion length when the leg is inserted between the windings is L, the leg is set so that H and L satisfy the relationship represented by the formula (1). It is characterized by being formed,
Since it is inserted deeply between the windings, the protective device does not come off between the windings during a magnetization operation or the like.

  The magnetizing method according to claim 3 of the present invention prevents the winding from being deformed by a large current flowing in the winding and causing an impact between adjacent windings of different phases to destroy the coating of the winding. Therefore, there is a remarkable effect that the magnetic material can be easily magnetized without causing a short circuit between adjacent windings of different phases.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig.1 (a) is explanatory drawing explaining the condition which uses the insulating winding protector and insulating winding protector of this invention, FIG.1 (b) is the insulating winding protection of this invention. It is sectional explanatory drawing explaining the state which inserted each leg of the tool between windings.
FIG. 2 is a cross-sectional explanatory view illustrating the relationship between the total length H of the winding and the insertion length L when the leg of the insulating winding protector of the present invention is inserted between the windings.
FIG. 3 is a vertical cross-sectional view of an example of a compressor that houses an electric element having a winding wound around a plurality of teeth by a concentrated winding method.

  In FIG. 3, reference numeral 1 denotes an airtight container, in which the electric element 2 disposed on the lower side and the compression element 3 disposed on the upper side are accommodated. The electric element 2 is a so-called magnetic pole concentrated winding type DC motor, and includes a stator 4 and a rotor 5 inserted and installed at a slight interval inside the stator 4. The rotor 5 is fixed to a rotating shaft 6 that passes through the center and extends in the vertical direction, and the rotating shaft 6 is supported by a bearing 7.

As shown in FIG. 4, the stator 4 includes a laminated body 4A in which doughnut-shaped electromagnetic steel plates are laminated, and six teeth portions (tooth portions) 4C provided in the laminated body 4A. (Plastic insulator) 3 phase winding 4B (4B-U1, 4B-V1, 4B-W1, 4B-U2, 4B-V2, 4B-W2) directly wound by concentrated winding method through 20 is doing.
The electric element 2 includes the stator 4 and a rotor 5 inserted and installed inside the stator 4 at a predetermined interval. The rotor 5 is fixed to a rotating shaft 6 that extends in the vertical direction through the center. The rotor 5 is formed of a laminated body 5A of electromagnetic steel sheets, like the stator 4, and a magnetic material 30 such as rare earth or ferrite is inserted into the laminated body 5A, and the insulating winding protection according to the present invention will be described later. After setting using the tool 40, a large current is passed through the winding 4B of the stator 4 for a short time to magnetize the magnetic material 30 to form a permanent magnet. Reference numeral 8 denotes a balancer mounted above and below the rotor 5.

The electric element 2 and the compression element 3 are elastically attached to the inner wall of the sealed container 1.
The compression element 3 includes a cylinder 9, a piston 11 that reciprocates in the cylinder 9 by being fitted to a crankpin 10 of the rotary shaft 6, a valve seat 12 provided on an end surface of the cylinder 9, and the valve seat 12. And a cylinder head 13 attached to the cylinder 9. A discharge valve (not shown) for opening and closing the discharge port is attached to the valve seat 12 on the cylinder head 13 side.
A terminal 18 connected to an external power source (not shown) is attached to the side of the sealed container 1, and a lead wire 50 (see FIG. 1) connected to the terminal 18 and a winding 4 </ b> B of the electric element 2 are shown. A lead wire that is not connected is connected via a connecting portion (not shown) to supply power to the electric element 2.

A refrigerant such as an HFC refrigerant or a natural refrigerant such as a hydrocarbon (HC) refrigerant or carbon dioxide (CO ₂ ), which has little influence on the environment, is sucked into the sealed container 1.
And existing refrigerator oils 14 such as mineral oil (mineral oil), alkylbenzene oil, ether oil, ester oil, PAG (polyalkyl glycol) and the like are enclosed.

  In the electric compressor (reciprocating electric compressor) using the refrigerating machine oil 14, when the coil 4B of the electric element 2 of the electric compressor is energized through a wiring (not shown), the electric element 2 is activated and the rotor is activated. 5 rotates. By this rotation, the piston 11 fitted to the crankpin 10 reciprocates. The refrigerant flowing into the cylinder 9 due to the reciprocating sliding of the piston 11 is compressed in the cylinder 9 and is discharged to the external refrigeration cycle by opening a discharge valve (not shown) and used in circulation.

  The oil 14 placed in the bottom of the sealed container 1 fills the inside of the lubricating oil cup from the hole 16 of the lubricating oil cup 15, and the rotary shaft 6 having a hollow lubricating oil passage 17 in the central portion of the lubricating oil cup 15. The oil 14 is sucked up by the vacuum phenomenon caused by the vortex generated at the upper open end by the high-speed rotation of the rotary shaft 6, and circulates and lubricates each sliding portion such as the piston 11 / cylinder 9, the rotary shaft 6 / bearing 7 and the like. It is like that.

  As shown in FIG. 1A, the insulative winding protector of the present invention is formed of plastic, and this insulative winding protector 40 is inserted between the adjacent windings 4B by a predetermined length. A necessary number (six in this example) of substantially rectangular legs 41 are provided, and a fixing portion 42 for fixing and supporting the legs 41 is integrated with the legs 41, for example, by injection molding or casting. It is formed using a molding method such as a molding method.

  When magnetizing the magnetic material 30 such as rare earth or ferrite inserted into the laminated body 5A after fixing the electric element 2 in a predetermined position, as shown in FIG. The six legs 41 of the insulating winding protector 40 are inserted between the adjacent windings 4B, respectively, and the entire insulating winding protector 40 is fixed. Thereafter, a large current is passed through the winding 4B of the stator 4 for a short time to magnetize the magnetic material 30 to form a permanent magnet. In this way, since the legs 41 are interposed between the adjacent windings 4B, the windings are deformed by a large current flowing through the windings, and an impact is applied between the adjacent windings 4B of different phases, and the coating of the windings Therefore, the magnetic material 30 can be easily magnetized without causing a short circuit between the adjacent windings 4B of different phases.

  The sizes, dimensions, shapes, etc. of the legs 41 and the fixing portions 42 of the insulating winding protector 40 of the present invention are determined in consideration of the sizes, dimensions, shapes, etc. of the electric element 2. When the magnetic material 30 inserted into the rotor 5 is magnetized, the winding 4B has a thickness and strength that can sufficiently maintain electrical insulation when a large current is applied to the winding 4B for a short time. 41 is inserted between the adjacent different-phase windings 4B for a predetermined length and fixed, and then when the winding is energized, the winding is deformed by a large current flowing in the windings and the adjacent different-phase windings are wound. It is preferable to design so that a shock can be prevented from being applied between the wires 4B and the coating of the windings can be destroyed, and a short circuit does not occur between the adjacent windings 4B of different phases.

  However, if the thickness d of the leg 41 is too large, when the leg 41 is inserted between the adjacent windings 4B, rubbing may damage the winding 4B, resulting in poor insulation or disconnection. It is necessary to avoid it. Accordingly, the thickness d of the leg 41 is sufficiently thick to improve the insulation and strength of the leg 41 itself, but damages the winding 4B when inserted between the adjacent windings 4B. It must be not thick.

As shown in FIG. 2, the insulative winding protector 40 of the present invention has a length H of the winding 4B and a length L when the leg 41 is inserted between the windings 4B. The legs 41 are preferably formed so that H and L satisfy the relationship represented by the following formula (1).
(1/2) H ≦ L Formula (1)

As shown in FIG. 2, the winding 4B swells around the central portion of the total length H, and the interval between the adjacent windings 4B is small. Therefore, when L is at least (1/2) H, When the coil 4B is energized without passing through between the coils 4B, the coil is deformed by a large current flowing through the coil, and an impact is applied between the adjacent coils 4B of different phases to form a film of the coil. It can be prevented from being broken, and a short circuit does not occur between the adjacent windings 4B of different phases, so that stable magnetization can be achieved.
And it is more preferable that L of the said leg 41 is below H as represented by following Formula (2), and more realistically, as represented by following Formula (3), L is set to (2 / 3) It is particularly preferable from the viewpoint of cost, processing surface, and the like that the leg 41 is formed to be H or less.
(1/2) H ≦ L ≦ H Formula (2)
(1/2) H ≦ L ≦ (2/3) H Formula (3)

  The insulating plastic used in the present invention is not particularly limited as long as it is excellent in electrical insulation and excellent in rigidity and physical strength, and may be any insulating plastic that can be molded by the molding method. Polyester resins such as butylene terephthalate, fluorine resins, and engineering plastics can be used preferably because they are readily available and inexpensive.

  In the above description, the case of the three-phase winding 4B has been described, but the number of phases is not limited to three. In the case of the two-phase winding 4B, an insulative winding protector 40 having two legs 41 at opposite positions as shown in FIG. If the coil is energized by inserting the length, fixing, and then energizing the coil, the coil is deformed by a large current flowing through the coil and an impact is applied between the adjacent coils 4B of different phases. The magnetic material 30 can be easily magnetized without causing a short circuit between the adjacent windings 4B of different phases.

  The description of the above embodiment is for explaining the present invention, and does not limit the invention described in the claims or reduce the scope thereof. Moreover, each part structure of this invention is not restricted to the said embodiment, For example, the following various deformation | transformation are possible within the technical scope as described in a claim.

  In the above description, the reciprocating compressor has been described, but the type of the compressor is not particularly limited, and specifically, a rotary compressor, a vibratory compressor, a multi-vane rotary compressor, a scroll compressor, etc. The number of compression stages may be at least one stage of compression.

  The compressor can be used for home air conditioners, commercial air conditioners (package air conditioners), automotive air conditioners, household refrigerators, commercial refrigerators, commercial freezers, commercial freezer refrigerators, showcases, vending machines, water heaters, etc. Is.

The insulating winding protector of the present invention includes a stator having a plurality of teeth portions and windings wound around the teeth portions in a concentrated winding manner, and a predetermined interval is provided inside the stator so as to be concentric with the stator. Insulation used when magnetizing the magnetic material of an electric element having a rotor that is fixed to a rotating shaft in a shape and is rotatably held and includes a rotor formed by inserting a magnetic material into a laminate in which electromagnetic steel plates are laminated. Winding protector,
The winding protector includes a necessary number of legs that can be inserted between adjacent windings by a predetermined length, and a fixing portion for fixing and supporting the legs is formed integrally with the legs. It is characterized by that,
Used when magnetizing the magnetic material inserted into the rotor, the leg is inserted between the adjacent different-phase windings for a predetermined length, fixed, and then energized to the winding to flow into the winding. Since it is possible to prevent a winding from being deformed due to a large current and an impact between the adjacent windings of different phases to break the coating of the winding, no short circuit occurs between adjacent windings of different phases. Since the magnetic material can be easily magnetized, it has a remarkable effect of industrial use.

(A) is explanatory drawing explaining the condition which uses the insulating winding protector and insulating winding protector of this invention, (b) is each leg of the insulating winding protector of this invention It is sectional explanatory drawing explaining the state which inserted in between the coil | windings. It is sectional explanatory drawing explaining the relationship between the full length H of a coil | winding, and the insertion length L when the leg of the insulating winding protector of this invention is inserted between the said coil | windings. It is a longitudinal cross-sectional view of an example of the compressor which accommodated the electric element which has the coil | winding wound by the concentrated winding system in the several teeth part. FIG. 4 is an explanatory plan view of teeth portions (tooth portions), windings, and the like of the laminate of the stator of the electric element shown in FIG. 3. In the case of a two-phase winding, it is a cross-sectional explanatory view illustrating a state in which each leg of the insulating winding protector of the present invention is inserted between the windings.

Explanation of symbols

2 Electric element 4 Stator 4A Laminate 4B Winding 4C Teeth part 5 Rotor 5A Laminate 6 Rotating shaft 18 Terminal 30 Magnetic material 40 Insulating winding protector 41 Leg 42 Fixing part 50 Lead wire H Total length L of winding Insertion length The

Claims (3)

A stator having a plurality of teeth portions and windings wound around the teeth portions by a concentrated winding method, and a predetermined interval is provided inside the stator, and the stator is concentrically fixed to a rotating shaft and is rotatable. An insulating winding protector used when magnetizing the magnetic material of an electric element comprising a rotor formed by inserting a magnetic material into a laminate in which electromagnetic steel sheets are laminated,
The winding protector includes a necessary number of legs that can be inserted between adjacent windings by a predetermined length, and a fixing portion for fixing and supporting the legs is formed integrally with the legs. Insulating winding protector characterized by that. When the total length of the winding is H and the insertion length when the leg is inserted between the windings is L, the leg is set so that H and L satisfy the relationship represented by the following formula (1). The insulating winding protector according to claim 1, wherein:
(1/2) H ≦ L Formula (1) A stator having a plurality of teeth portions and windings wound around the teeth portions by a concentrated winding method, and a predetermined interval is provided inside the stator, and the stator is concentrically fixed to a rotating shaft and is rotatable. When magnetizing the magnetic material of the electric element comprising a rotor formed by inserting a magnetic material into a laminate in which electromagnetic steel plates are laminated,
Insulating winding protectors having a necessary number of legs that can be inserted between the adjacent windings, and a fixing portion for fixing and supporting the legs are formed integrally with the legs. The magnetizing method, wherein the leg is inserted between the adjacent windings and fixed, and then the winding is energized to magnetize the magnetic material.

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