JP2015033158A - Motor for compressor and compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor for compressor which uses aluminum for winding free from any problem in performance or manufacturing and a compressor including the same.SOLUTION: A motor for compressor 20 is employed for a scroll compressor 1 which compresses a coolant by driving a scroll compression element 10. The motor for compressor 20 includes: a stator 23 having a stator winding 24; and a rotator 25 which rotates within the stator 23. The stator winding 24 is constituted of a copper clad aluminum wire, or a composite wire of copper clad aluminum wire and copper wire.

Description

  The present invention relates to a compressor motor employed in a compressor that compresses a refrigerant by a compression element, and a compressor including the same.

  Conventionally, in this type of compressor, a compression element such as a scroll or a rotary and a motor (electric element) are housed in a sealed container, and the compression element is driven by this motor to compress the refrigerant. The motor is composed of a stator having a stator winding wound around a core, and a rotor that rotates within the stator, and rotationally drives the compression element by a rotating shaft fitted to the rotor. (For example, see Patent Document 1).

JP 2009-228434 A

  Here, in the motor of the compressor which concerns conventionally, two types, a copper wire and an aluminum wire, are used as a stator winding | coil, and the insulation film of a refrigerant | coolant resistance was coated on these. In this case, a copper wire has been generally used in consideration of electric conductivity, but there are some that adopt an aluminum wire for the purpose of cost reduction and weight reduction.

However, when using an aluminum wire, there are many problems in terms of manufacturing and performance as described below. That is,
1. Winding unit In the case of an aluminum wire, the adhesion between the aluminum and the insulating film (coating) is lower than that of a copper wire. Therefore, if the varnish impregnation treatment is performed, there is a risk that the film is broken.
2. Treatment of connecting parts • When connecting to the copper wire (connection object) of the terminal (faston terminal) for connecting to the terminal, a potential difference due to dissimilar metal material occurs, and electrolytic corrosion occurs.
-Aluminum wire has a high surface oxidation rate and is difficult to solder.
-When crimping a connection object with a connection block, the strength decreases due to low hardness.
・ Stress relaxation (cold flow) occurs.
3. Motor manufacturing ・ In order to make the current capacity of aluminum wire equivalent to copper wire, 1.5 times the wire diameter is required.
-Disconnection is likely to occur during manufacturing due to a decrease in strength.
・ Due to strength reduction, it will be deformed during molding.
4). Motor characteristics ・ Starting torque and stopping torque decrease due to a decrease in conductivity, resulting in a decrease in operating efficiency.
・ The heat generation of the motor increases due to the decrease in conductivity.
・ Motor protection becomes difficult due to an increase in temperature rise.

  The present invention has been made to solve the conventional technical problems, and uses a motor for a compressor that does not cause performance or manufacturing problems while using aluminum for the winding. It aims at providing the compressor provided.

  In order to solve the above problems, a compressor motor of the present invention is employed in a compressor that drives a compression element to compress refrigerant, and includes a stator having a stator winding, The stator winding is composed of a rotor that rotates in a stator, and the stator winding is composed of a copper clad aluminum wire or a composite wire of a copper clad aluminum wire and a copper wire.

  In the compressor motor of the invention of claim 2, in the above invention, the copper clad aluminum wire constituting the stator winding is covered with an insulating film, and the copper is exposed by peeling this insulating film, The connecting portion is configured.

  A motor for a compressor according to a third aspect of the present invention is characterized in that, in the above invention, the connecting portion is covered with an insulator in a state of being connected to a connection target.

  A motor for a compressor according to a fourth aspect of the invention is characterized in that, in the invention of the second or third aspect, the connecting portion is joined to the connection object by lead-free solder.

  According to a fifth aspect of the present invention, there is provided a compressor motor in which the stator core thickness is increased in the range of 10% or more and 15% or less as compared with the above-described invention in which the stator winding is formed of copper wire. The diameter of the copper clad aluminum wire is enlarged in the range of 20% to 30%.

A compressor motor according to a sixth aspect of the present invention is characterized in that, in each of the above-mentioned inventions, the current density at start is suppressed to 60 A / mm ² or less.

  A compressor motor according to a seventh aspect of the present invention includes the compressor motor according to any of the above inventions, wherein a ratio of a starting current to an overload operating current is set to 2.95 or more and 3.20 or less. .

  A compressor according to an eighth aspect of the present invention includes the compressor motor according to any one of the first to seventh aspects.

  Originally, copper-clad aluminum wire is used for the purpose of flowing a large current and an electric wire that needs to be light weight, such as a cable wire, for the purpose of skin effect, which is highly effective for high-frequency power supply wiring. None are used for motors or DC brushless motors.

  According to the present invention, in a motor for a compressor, which includes a stator having a stator winding and a rotor that rotates in the stator and drives a compression element to compress refrigerant, the stator winding is made of copper. Since it was composed of a clad aluminum wire or a composite wire of a copper clad aluminum wire and a copper wire, by adopting the compressor as in claim 9, while solving various problems when using an aluminum wire, It is possible to reduce the weight.

  In other words, copper clad aluminum wire is cold-welded and atomically bonded by extension of the manufacturing process, so there is no problem in adhesion. It is possible to cope with the adhesiveness and the like by the same manufacturing method as that of the copper wire.

  In addition, since the surface is copper, performance degradation can be reduced compared to aluminum wire, and performance equivalent to copper wire can be achieved by changing the core thickness and winding specifications of the stator. It is.

  In this case, the copper clad aluminum wire coated with the insulating film as in the second aspect of the invention is peeled off to expose the copper, so that if the connecting portion is constituted, the copper wire or the like to be connected to the terminal When connecting to, there is no electrolytic corrosion due to dissimilar metal materials.

  Furthermore, if the connection portion is covered with an insulator in a state of being connected to the connection object as in the invention of claim 3, the insulation of the connection portion is also ensured.

  Furthermore, if the connection portion is joined to the connection object by lead-free solder as in the invention of claim 4, the environment is highly safe.

  In this case, as compared with the case in which the stator winding is constituted by the copper wire as in the invention of claim 5, the core thickness of the stator is increased in the range of 10% to 15%, and the copper clad aluminum wire If the diameter is expanded in the range of 20% or more and 30% or less, performance equivalent to that using a conventional copper wire can be exhibited.

Further, as in the sixth aspect of the invention, the current density flowing in the stator winding at the start of the compressor is suppressed to 60 A / mm ² or less, or the current at the start with respect to the overload operating current as in the seventh aspect of the invention. If the ratio is 2.95 or more and 3.20 or less, appropriate protection can be achieved.

It is a vertical side view of the compressor of one Example to which the present invention is applied. It is a plane sectional view of the compressor of Drawing 1. It is sectional drawing of the stator winding | coil of the motor of the Example of this invention mounted in the compressor of FIG. It is sectional drawing of the stator winding | coil of the motor of the other Example of this invention mounted in the compressor of FIG. It is an enlarged view of the connection part of the stator winding | coil of the motor of the compressor of FIG. It is a figure explaining the efficiency of the motor of the compressor of FIG.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a scroll compressor 1 as an embodiment of the compressor of the present invention, and FIG. 2 is a plan sectional view. The scroll compressor 1 of the embodiment is of an internal high pressure type, and as shown in FIG. 1, the vertical cylindrical sealed container 2 made of a steel plate and the present invention disposed and accommodated in the internal space of the sealed container 2. A motor (electric element) 20 serving as a compressor motor, and a scroll compression element 10 positioned above the motor 20 and driven by a rotating shaft 22 of the motor 20 are configured. The sealed container 2 has an oil reservoir 6 at the bottom, a container body 4 that houses the motor 20 and the scroll compression element 10, a bowl-shaped end cap 4A that is attached to close the upper opening of the container body 4, and a container. It is comprised from the bowl-shaped bottom 4B attached so that the bottom part opening of the main body 4 might be obstruct | occluded.

  An upper support frame (support frame) 28 is provided in the sealed container 2, and the upper support frame 28 divides the sealed container 2 into a discharge chamber 42 and a motor chamber 43. The discharge chamber 42 is formed on the end cap 4A side (upper side) of the upper support frame 28, and the motor chamber 43 is formed on the bottom 4B side (lower side) of the upper support frame 28. Specifically, the discharge chamber 42 is formed between the scroll compression element 10 and the end cap 4A.

  In this case, a plurality of (four in the embodiment) pedestal portions 28A projecting toward the motor 20 are formed on the peripheral portion of the upper support frame 28, and each pedestal portion 28A is welded to the sealed container 2 by welding W. It is fixed to the container body 4. Further, a discharge pipe 50 made of a metal pipe is welded and fixed to the container body 4 (sealed container 2) at a position corresponding to the vicinity of a bearing portion 30 to be described later of the upper support frame 28. Extends in the container body 4 by a predetermined size and opens into the motor chamber 43 below the upper support frame 28.

  The scroll compression element 10 is composed of a fixed scroll 12 fixed to the upper support frame 28, and an orbiting scroll 14 that is pivoted without rotating about the fixed scroll 12 as will be described later. In a state where the fixed scroll 12 and the swing scroll 14 are engaged with each other, a compression space 16 (compression chamber) is formed in a sealed space formed between the fixed scroll 12 and the swing scroll 14. The fixed scroll 12 is composed of a disc-shaped end plate 12A and a wrap 12B that is upright and formed in an involute curve or an approximate curve thereof, and has a discharge port 17 at the center and a suction port at the outer periphery. 18 is provided.

  A suction pipe 51 is connected to the suction port 18 from the vertical direction through the end cap 4A of the sealed container 2. Further, the inside of the discharge chamber 42 through which the discharge port 17 communicates is configured between the scroll compression element 10 (the fixed scroll 12 and the swing scroll 14) and the inner surface of the sealed container 2 (the inner surfaces of the end cap 4A and the container body 4). The motor chamber 43 communicates with the communication passage 34.

  The orbiting scroll 14 is formed in a disc-shaped end plate 14A, and a wrap 14B that stands upright and is formed in the same shape as the wrap 12B of the fixed scroll 12, and is projected on the opposite surface of the end plate 14A of the end plate 14A. , And a boss 29 having a boss hole at the center. A bearing portion 30 that continuously extends downward is formed in the central portion of the upper support frame 28, and the upper portion of the rotating shaft 22 is supported on the bearing portion 30.

  An oil pump 76 is provided below the rotary shaft 22. The oil pump 76 sucks up the oil accumulated in the oil reservoir 6 formed in the inner bottom portion (bottom 4B) of the sealed container 2 by the rotation of the rotary shaft 22, and compresses the scroll through the oil passage 22C formed in the rotary shaft 22. It is supplied to the sliding portion of the machine 1 (between the rotary shaft 22 and the bearing portion 30, between the eccentric shaft 22A and the boss 29 described later, between the swing scroll 14 and the upper support frame 28, etc.).

  The motor 20 of the embodiment is an AC motor (induction motor), and a stator winding 24 is wound around a core 21 in which a plurality of stator iron plates are laminated, and fixed to the inner surface of the container body 4 of the sealed container 2 ( For example, it is composed of a stator 23 that is shrink-fitted and a rotor 25 that rotates within the stator 23, and the rotary shaft 22 is fitted to the center of the rotor 25. The stator winding 24 will be described in detail later. The lower portion of the rotary shaft 22 (the bottom 4B side of the rotor 25) is pivotally supported by a lower support frame 52 serving as a sub bearing. The lower support frame 52 is also fixed to the container body 4 of the sealed container 2 by welding W below the motor 20.

  An eccentric shaft (pin) 22A is provided at the upper end of the rotating shaft 22 constituting the motor 20 and the shaft axis of the rotating shaft 22 is deviated from a predetermined dimension axis. The eccentric shaft 22A is the rocking scroll. The boss holes of the 14 bosses 29 are rotatably inserted. The fixed scroll 12 is fixed to the upper support frame 28 by a plurality of bolts 78 (only one is shown in the drawing), and the orbiting scroll 14 is It is supported on the support frame 28. Thereby, the orbiting scroll 14 is configured to perform a turning motion without rotating with respect to the fixed scroll 12.

That is, the oscillating scroll 14 is driven by the eccentric shaft 22A that is eccentric with respect to the axis of the rotating shaft 22 and the boss 29 that is inserted eccentrically with respect to the axis of the rotating shaft 22 is driven by the Oldham ring 41. Revolve on a circular path so as not to rotate with respect to the fixed scroll 12. Then, by the revolution, the fixed scroll 12 and the swing scroll 14 gradually reduce the plurality of crescent-shaped compression spaces 16 formed between the wrap 12B and the wrap 14B from the outside toward the inside. As a result, the refrigerant gas is sucked into the compression space 16 from the suction pipe 51. The sucked refrigerant gas is gradually compressed from the outside toward the inside through the compression space 16 to become high-pressure gas, and is discharged from the discharge port 17 to the discharge chamber 42. In addition, R22, R410A, R407C, R32, R404A, CO ₂ or the like is adopted as the refrigerant.

  On the other hand, the stator 23 constituting the motor 20 is fixed to the inner surface of the hermetically sealed container 2 (container body 4), and a predetermined gap 23A (space) between the inner wall of the container body 4 and a peripheral portion of the stator 23. It is configured. The gaps 23 </ b> A are formed at substantially equal intervals around the stator 23, and the periphery of the stator 23 other than the gap 23 </ b> A is fixed to the inner wall of the container body 4. The motor chamber 43 communicates with the lower oil reservoir 6 via a gap 23 </ b> A (passage) between the stator 23 and the inner surface of the sealed container 2. The upper portion of the motor chamber 43 communicates with a discharge pipe 50 that penetrates the sealed container 2 and opens near the bearing portion 30.

  A shielding plate 54 is provided on the lower surface of the upper support frame 28 so as to extend from the upper support frame 28 toward the motor 20 and surround the periphery of the bearing portion 30. The shielding plate 54 is provided outside the bearing portion 30 with a predetermined distance. Specifically, the shielding plate 54 corresponds to the inside of the coil end 24A of the stator winding 24 of the stator 23, the same as the area corresponding to the upper part of the rotor 25, or the outside of the area (see FIG. (See FIG. 1). Incidentally, B is a balancer attached to the upper surface of the rotor 25 and is located inside the shielding plate 54. The closed container 2 is provided with a plurality of support legs 70 (two are shown in FIG. 1) for standing the closed container 2 upright.

  The stator 23 constituting the motor 20 is provided with an overcurrent protection device (internal protector) 26 for stopping and protecting the motor 20 when an overcurrent flows in the motor 20 ( Figure 2). The overcurrent protection device 26 is disposed in a gas path P extending from the communication path 34 formed outside the shielding plate 54 to the discharge pipe 50. Specifically, as shown in FIG. 2, the overcurrent protection device 26 is provided at the coil end 24A of the stator winding 24 of the stator 23 constituting the motor 20, and is attached to the upper support frame 28 side of the coil end 24A. It is fixed.

  A guide member 44 (gas flow deflecting member) is provided below the communication path 34. The guide member 44 is discharged from the discharge port 17 into the discharge chamber 42 and flows in the direction of the shielding plate 54 and / or the inner surface of the container body 4 (sealed container 2) in the direction in which the refrigerant gas flows downward through the communication path 34. , Along the gas path P between the shielding plate 54 above the coil end 24A of the stator winding 24 of the motor 20 and the inner surface of the container body 4 (sealed container 2), and the direction of the discharge pipe 50 Configured to lead to.

  The discharge pipe 50 of the scroll compressor 1 is connected to the inlet side of an external condenser (not shown), and the suction pipe 51 is connected to the outlet side of an external evaporator (not shown). The scroll compressor 1, the condenser, a decompression device (not shown), and the evaporator constitute a known refrigerant circuit. A predetermined amount of refrigerant gas is enclosed in the refrigerant circuit. Then, the refrigerant gas discharged from the discharge port 17 of the scroll compression element 10 reaches the motor chamber 43 through the discharge chamber 42 and the communication path 34, exits the motor chamber 43, and is discharged from the discharge pipe 50 to the condenser. , The pressure reducing device and the evaporator are sequentially introduced, and the circulation returning from the suction pipe 51 to the suction port 18 of the scroll compression element 10 is repeated.

  Next, an outline of the flow of refrigerant gas and oil in the scroll compressor 1 will be described. When the stator winding 24 of the stator 23 of the motor 20 is energized from the terminal 49 attached to the hermetic container 4 and the rotor 25 is activated and the rotary shaft 22 rotates, the swing scroll 14 revolves as described above. Is done. Specifically, when the rotary shaft 22 is activated, the rotor 22 rotates counterclockwise in FIG. Due to the revolution of the orbiting scroll 14, the refrigerant gas guided from the suction pipe 51 to the suction port 18 is compressed in the compression space 16 of the scroll compression element 10, and then discharged from the discharge port 17 to the discharge chamber 42. It flows into the motor chamber 43 through the communication path 34.

  The refrigerant gas flows into the guide member 44, the direction of the refrigerant gas is changed, and the oil separation action is enhanced. The refrigerant gas that has flowed into the guide member 44 is changed in the flow direction and discharged in the vertical direction and the central direction of the hermetic container 12 (in the direction of the rotating shaft 22). Since the stator 23 exists below, most of the refrigerant gas advances toward the rotating shaft 22.

  Since the shielding plate 54 is provided inside the guide member 44 (in the direction of the rotation shaft 22), the refrigerant gas discharged in the direction of the rotation shaft 22 further collides with the shielding plate 54 and becomes a turbulent flow. At this time, the refrigerant gas in the gas path P between the shielding plate 54 and the inner surface of the container body 4 is discharged from the guide member 44 side through the overcurrent protection device 26 by the rotor 25 rotating counterclockwise as described above. It is moving in 50 directions.

  The refrigerant gas that has collided with the guide wall 48A, changed the flow direction, and collided with the shielding plate 54 smoothly travels in the gas path P in the direction of the overcurrent protection device 26 by the rotation of the rotating shaft 22, and the overcurrent protection is performed. Collide with device 26. These multiple collisions increase the oil separation effect of the refrigerant gas. The oil separation efficiency is increased by a plurality of collisions, most of the oil is separated from the refrigerant gas, and the refrigerant gas that has undergone oil separation then passes through the gas path P to the discharge pipe 50, where the discharge gas is discharged. It is discharged from the pipe 50 to the outside of the scroll compressor 1 (outside the sealed container 2).

  That is, the refrigerant gas in the gas path P collides with the overcurrent protection device 26, so that the oil separation action is enhanced. Thereby, the mist-like oil contained in the refrigerant gas is efficiently captured by the inner surface of the container body 4, the coil end 24A, the overcurrent protection device 26, and the like.

  The oil separated from the refrigerant gas and captured by the guide member 44 falls from the gap 2 between the bottom wall 47 and the inner surface of the sealed container 2 (including the gap between the bottom wall 47 and the side wall 46) (FIG. 4). The oil trapped by the overcurrent protection device 26 also falls, passes through the gap 23A between the stator 23 and the inner surface of the hermetic container 2, and falls into the lower oil reservoir 6, and again the oil pump 76 is supplied to the sliding portion described above.

  Next, the stator winding 24 of the compressor motor 20 of the present invention mounted on the scroll compressor 1 of the present invention will be described with reference to FIG. In the present invention, a copper clad aluminum wire L is adopted for the stator winding 24. As shown in FIG. 3, the copper clad aluminum wire L has a base 45 made of aluminum or aluminum alloy having a low specific gravity, a copper film 46 is deposited on the outer periphery of the base 45, and an insulating film 47 is coated on the outer periphery of the copper film 46. It is configured to be worn. In this case, the copper film 46 and the aluminum substrate 45 are cold-welded and bonded together by extension of the manufacturing process. Further, the specific gravity of the copper clad aluminum wire L is 3.63, which is extremely light compared to the specific gravity of the copper wire of 8.89.

  The conductivity ratio of the copper clad aluminum wire L is 0.68 with respect to the copper wire 1. Therefore, when the capacity is insufficient, a composite wire of a base 48 made of copper and a copper wire L1 made of an insulating film 47 as shown in FIG. The stator winding 24 of the stator 23 of the motor 20 is subjected to varnish impregnation treatment.

  And the connection part 53 (FIG. 5) of the edge part of the stator coil | winding 24 which is connected to the connection line (connection object) 55 provided with the Faston terminal connected to the terminal 49, In this case, In the connection portion 53, only the insulating coating 47 is stripped by a coating stripping device (not shown), and the copper film 46 is exposed. At this time, the rotational speed of the film peeling apparatus is controlled to prevent oxidation of aluminum.

  Then, the connection portion 53 (copper film) of the stator winding 24 is wound around the copper wire 55A of the connection wire 55, and lead-free solder is soaked and connected. Then, the entire connecting portion including the connecting portion 53 is covered with an insulator 56 made of an insulating heat-shrinkable tube, and fixed and reinforced (FIG. 5).

  Here, FIG. 6 shows a comparison of the efficiency of the scroll compressor 1 of each output at the standard load when the copper wire L1 is used as the stator winding and when the copper clad aluminum wire L is used. Yes. In this case, the copper clad aluminum wire L has a wire diameter of 20% to 30% larger than that of the copper wire L1, and the core 21 has a thickness of the copper clad aluminum wire L as compared with the case where the copper wire L1 is used. Increased by 12%.

  As is apparent from this figure, by adjusting the wire diameter and core thickness, even when the copper clad aluminum wire L is used, the efficiency comparable to that when the copper wire L1 is used is shown, equivalent or It turns out that the performance and efficiency more than it are demonstrated. In addition, the expansion range of the wire diameter is preferably 20% to 30%, and the range in which the core 21 is increased is preferably 10% to 15%.

  As described above in detail, according to the present invention, the scroll compression includes the stator 23 having the stator winding 24 and the rotor 25 rotating in the stator 23 and drives the scroll compression element 10 to compress the refrigerant. In the motor 20 for the machine 1, since the stator winding 24 is composed of the copper clad aluminum wire L or the composite wire of the copper clad aluminum wire L and the copper wire L1, various problems when using the aluminum wire. It becomes possible to realize weight reduction while solving the above.

  That is, since the copper clad aluminum wire L is cold-welded due to the extension of the manufacturing process and is primitively bonded, there is no problem in adhesion, and the surface of the copper-clad aluminum wire L is made of copper. About the adhesiveness etc. of a film | membrane, it becomes possible to respond by the same manufacturing method as the copper wire L1.

  Moreover, since the surface is copper, the performance degradation can be reduced compared to aluminum wires, and the equivalent performance to copper wires can be achieved by changing the thickness of the core 21 of the stator 23 and the winding specifications. Is also possible.

  In this case, since the insulating film 47 of the copper clad aluminum wire L covered with the insulating film 47 is peeled off to expose the copper film 46, the connection portion 53 is formed. When connecting to, there is no electrolytic corrosion due to dissimilar metal materials.

  Furthermore, since the connection part 53 is covered with the insulator 56 in a state of being connected to the copper wire 55A, the insulation of the connection part is also ensured. Furthermore, since the connection portion 53 is joined to the copper wire 55A by lead-free solder, the environment is highly safe.

  In this case, compared with the case where the stator winding 24 is constituted by the copper wire L1, the product thickness of the core 21 of the stator 23 is increased in the range of 10% to 15%, and the wire diameter of the copper clad aluminum wire L is increased. If it is expanded in the range of 20% or more and 30% or less, performance equivalent to that using the conventional copper wire L1 can be exhibited.

Further, the current density flowing through the stator winding 24 at the start of the scroll compressor 1 is suppressed to 60 A / mm ² or less, or the ratio of the starting current to the overload operating current is 2.95 or more and 3.20 or less. If so, proper protection is possible.

  In the embodiment, the present invention is applied to the scroll compressor. However, the present invention is not limited to this, and can be applied to other types of compressors such as a rotary compressor and a reciprocating compressor. In the embodiments, the compressor motor according to the present invention has been described using an AC motor. However, it goes without saying that the present invention is also effective for a DC motor.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 10 Scroll compression element 20 Motor 21 Core 23 Stator 24 Stator winding 25 Rotor

Claims (8)

A compressor motor that drives a compression element to compress refrigerant;
A stator having a stator winding and a rotor rotating in the stator, and the stator winding is made of a copper clad aluminum wire or a composite wire of a copper clad aluminum wire and a copper wire. Compressor motor characterized by   The copper clad aluminum wire constituting the stator winding is covered with an insulating film, and the connecting part is formed by peeling the insulating film to expose copper. A motor for a compressor according to 1.   The compressor motor according to claim 2, wherein the connection portion is covered with an insulator while being connected to a connection target.   The compressor motor according to claim 2 or 3, wherein the connection portion is joined to the connection object by lead-free solder.   Compared to the stator winding made of copper wire, the stator core thickness is increased in the range of 10% to 15%, and the diameter of the copper clad aluminum wire is 20% to 30%. The motor for a compressor according to any one of claims 1 to 4, wherein the motor is expanded in the following range. The motor for a compressor according to any one of claims 1 to 5, wherein a starting current density is suppressed to 60 A / mm ² or less.   7. The motor for a compressor according to claim 1, wherein a ratio of a starting current to an overload operating current is set to 2.95 or more and 3.20 or less.   The compressor provided with the motor for compressors in any one of Claim 1 thru | or 7.

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