Electric motor and hermetic compressor with same

专利摘要:
The present invention relates to an electric motor having a stator in which a coil is wound around a core, a rotor accommodated in the stator to rotate, and a rotating shaft which rotates integrally with the rotor. Grooves are formed. Thereby, an electric motor capable of efficient cooling and reduced weight is provided.
公开号:KR19980044371A
申请号:KR1019960062452
申请日:1996-12-06
公开日:1998-09-05
发明作者:백충국
申请人:김광호；삼성전자 주식회사；
IPC主号:

专利说明:

Electric motor and hermetic compressor with same
The present invention relates to an electric motor and a hermetic compressor having the same.
The electric motor is composed of a stator with a coil wound around the core, a rotor accommodated in the stator to rotate, and a rotation shaft that is pressed into the rotor and integrally rotates. The stator is formed by stacking a plurality of core plates. Then, the rotor is formed of a permanent magnet is rotated by the action of the magnetic field generated when the current flows through the coil of the stator.
4 is a perspective view of a stator of a conventional electric motor. The stator 51 is formed by stacking a plurality of core plates 67 having the same shape. As shown in FIG. 5, each core plate 67 has a plurality of coil slots 63 formed along the circumferential direction at the edge portion of the inner diameter portion 66 that is circularly cut in the center portion to accommodate the rotor. The coil is accommodated in the coil slot 63, the coils are collected at the upper and lower portions of the core 62, and are fixedly installed along the circumferential direction of the core 62 to form the coil portion 61.
By the way, when power is applied and operated to the conventional electric motor having the stator 51, heat loss such as copper loss and iron loss generated by the stator 51 is generated in the electric motor. Copper loss refers to heat loss generated by the resistance of the coil when current flows through the coil of the stator 51, and heat loss generated by eddy current generated by the magnetic field generated in the core 62 of the stator 51 is called iron loss. do. Therefore, heat is generated in the stator 51 by heat loss generated by iron loss and copper loss, and the temperature of the electric motor itself increases. The heating problem of the electric motor is a significant obstacle in achieving high efficiency of the electric motor.
Accordingly, it is an object of the present invention to provide an electric motor in which heat dissipation of the electric motor can be made efficiently.
Another object of the present invention is to provide a hermetic compressor having an electric motor capable of efficient heat dissipation.
1 is a cross-sectional view of a hermetic reciprocating compressor having an electric motor according to the present invention;
2 is a perspective view of a stator of an electric motor according to the present invention;
3 is a cross-sectional view of the stator core plate according to the present invention;
4 is a perspective view of a stator of a conventional electric motor,
5 is a cross-sectional view of a conventional stator core plate.
Explanation of Signs of Major Parts of Drawings
1: stator 2: rotor
3: rotating shaft 10: electric motor
11 coil portion 12 core
13 coil slot 14 coil groove
15: fastening hole 16: internal diameter
17: core plate
The present invention relates to a motor having a stator wound around a core, a rotor accommodated in the stator, and a rotating shaft rotated integrally with the rotor. It is achieved by an electric motor, characterized in that a groove is formed. Here, the groove is preferably formed along the axial direction of the core, and the outer surface of the core can be made to form a wave shape by the groove.
The object is also achieved by a hermetic compressor having the above-described electric motor and a reciprocating compression section driven by the electric motor to compress the refrigerant.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
1 is a cross-sectional view of a hermetic compressor having an electric motor 10 according to the present invention. The hermetic reciprocating compressor comprises a cylinder device 20 for sucking, compressing and discharging a refrigerant, and an electric motor 10 for driving the cylinder device 20. The electric motor 10 is composed of a stator 1 in which a coil is wound around a core 12 and a rotor 2 formed of a permanent magnet, and the rotor 2 is a coil in the stator 1. Is housed so as to be rotatable by a magnetic field generated when current flows. The rotating shaft 3 is press-fitted to the shaft center of the rotor 2 and rotates integrally with the rotor 2.
The cylinder device 20 includes a cylinder block 5 for supporting the electric motor 10 and a cylinder 6 in which a piston 7 reciprocating to compress the refrigerant is accommodated. The piston 7 is connected to the rotation shaft 3 by a connecting rod 8 which converts the rotational movement of the rotation shaft 3 into a reciprocating linear movement of the piston 7 and transmits it.
2 is a perspective view of the stator 1 of the electric motor 10 according to the present invention. The stator 1 is composed of a core 12 formed by stacking core plates 17 of the same shape formed of a plurality of silicon steel sheets, and a coil wound around the core 12. Each core plate 17 has a plurality of coils along the circumferential direction at the edge of the inner diameter portion 16 where the core is cut away to accommodate the rotor, as shown in FIG. 3 showing the core plate 17 as a plan view. The slot 13 is formed and a coil is accommodated in this coil slot 13. In the outer edge portion of the core plate 17, a plurality of cutting grooves 18 are formed at regular intervals. The coils accommodated in the coil slot 13 of the core plate 17 are collected at the upper and lower portions of the core 12. The aggregated coils are fixedly installed along the circumferential direction of the core 12 to form the coil part 11.
In addition, the cutting grooves 18 formed on the outer edge of the core plate 17 are formed by a plurality of grooves which are repeated at regular intervals along the axial direction on the outer surface of the core 12 in a state where the core plates 17 are stacked. 14). These grooves 14 are recessed from the outer surface of the core 12 and form a wave shape as a whole together with the ridges between the grooves 14. The surface of the core 12, which is irregularly formed by the grooves 14 in the form of a wave, has an increased surface area, thereby increasing the heat dissipation area, thereby increasing the cooling efficiency. On the other hand, the upper and lower edges of the core 12 is formed with a fastening hole 15 is fastened to the screw can be fixed to the cylinder block through this.
With the above configuration, when power is applied to the compressor to operate the electric motor 10, current flows through the coil of the stator 1. When current flows through the coil, heat loss occurs due to the heat loss generated by the resistance of the coil and the eddy current generated by the magnetic field generated in the core. Thus, the compressor generates heat by such heat loss, and the temperature of the compressor is increased. According to the present invention, since the grooves 14 having a wavy shape are formed on the outer surface of the stator 1, the heat dissipation area of the stator 1 is increased, so that the temperature rise of the compressor can be limited, thereby making the compressor more efficient. In addition, since the weight of the stator 1 is reduced by the grooves 14 formed in the stator 1, the weight of the compressor is also reduced.
As described above, according to the present invention, it is possible to provide an electric motor and a compressor with efficient cooling and reduced weight.

权利要求:
Claims (4)
[1" claim-type="Currently amended] In an electric motor having a stator wound around a core, a rotor accommodated in the stator to rotate, and a rotating shaft that rotates integrally with the rotor,
An electric motor, characterized in that a plurality of grooves are formed on an outer surface of the core of the stator.
[2" claim-type="Currently amended] The method of claim 1,
The groove is an electric motor, characterized in that formed along the axial direction of the core.
[3" claim-type="Currently amended] The method of claim 2,
The outer surface of the core is an electric motor, characterized in that the wave form by the groove.
[4" claim-type="Currently amended] The hermetic compressor according to any one of claims 1 to 3, and a reciprocating compressor which is driven by the electric motor to compress the refrigerant.

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同族专利:

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公开号 | 公开日

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KR100222933B1|2000-01-15|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
1996-12-06|Application filed by 김광호, 삼성전자 주식회사

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1996-12-06|Priority to KR1019960062452A

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1998-09-05|Publication of KR19980044371A

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2000-01-15|Application granted

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2000-01-15|Publication of KR100222933B1

优先权:

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申请号 | 申请日 | 专利标题

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KR1019960062452A|KR100222933B1|1996-12-06|1996-12-06|Hermetic compressor and electrical motor therein|