KR20220157859A - 3-phase connector integrated stator and electric compressor including the same - Google Patents

Abstract

The present invention relates to a three-phase connector integrated stator and an electric compressor including the same. The present invention comprises: a stator which includes a plurality of teeth extending from a cylindrical core, an insulator wrapping around the outer side of the core and the teeth to be coupled, and a coil wound on the outer side of the insulator from each of the teeth; a motor cover which is combined with the insulator on the upper side in the direction of the central axis of the stator, and has a connector coupling portion protruding upward from a top plate; and a three-phase connector which is inserted and combined into the connector coupling portion of the motor cover, to which the three-phase coil of the stator is connected, and which has a connector pin connecting portion formed upwardly. Therefore, the present invention facilitates the assembly and combination of the three-phase connector with the stator, and can easily assemble the connector pins to the three-phase connector.

Description

3-phase connector integrated stator and electric compressor including the same

The present invention relates to a stator integrally configured with a three-phase connector connected to three phases of a stator in an electric compressor of a vehicle and a cover coupled to one side of the stator to protect a coil, and an electric compressor including the same.

Recently, in accordance with low-emission and high-fuel efficiency policies due to problems such as depletion of fossil fuels and environmental pollution, hybrid vehicles or electric vehicles using both fossil fuel and electricity as driving sources have been in the limelight, and research on them has been actively conducted.

Such a hybrid vehicle or electric vehicle obtains power for propulsion of the vehicle through an electric motor. Accordingly, unlike mechanical compressors that have been widely used in existing vehicle air conditioning systems, there has recently been a trend toward using electric compressors.

An electric compressor includes an electric motor that converts electrical energy into mechanical energy and an inverter that controls rotation of the electric motor. Accordingly, the assembly structure and size of the electric motor greatly affect the assembly structure of the entire compressor.

An electric motor of such an electric compressor generally includes a cylindrical rotor and a stator around which a coil is wound.

1 is a perspective view showing a stator of an electric motor in a conventional electric compressor.

As shown, the electric motor of the electric compressor is formed in an approximate shape of a hollow cylinder and includes a stator 10 around which a coil is wound and a rotor (not shown) disposed inside the stator and rotated. In addition, in the stator 10, a lead wire of the coil extends from the end turn 20 of the coil in order to receive three-phase (U, V, W phase) power from the inverter, and a three-phase terminal having three terminals. A connector 30 is configured. Here, the three-phase connector 30 is exposed through an opening formed on one side of the compressor housing when the stator 10 is housed in the compressor housing, and thus the terminals 32 included in the three-phase connector 30 are connected to the housing. It is electrically connected to the inverter installed outside the opening of the

However, such a conventional electric compressor has a structure in which the fixing part 31 of the three-phase connector 30 is fixed by being forcefully fitted into the groove 11 of the stator 10, and the stator is hot press-fitted into the compressor housing. It is bonded and fixed. At this time, in the process of heating the compressor housing, inserting the stator, and then cooling the compressor housing so that the stator is fixed, the position or angle of the stator changes due to the gap between the compressor housing and the stator. Accordingly, since the position of the 3-phase connector is also changed, it is difficult to assemble the connect pin mounted on the connect pin coupling part formed in the compressor housing to the 3-phase connector. In addition, it is difficult to assemble and fix the three-phase connector to the stator by forming a separate coupling structure between the three-phase connector and the stator.

KR 10-1422320 B1 (2014.07.16)

The present invention has been made to solve the problems described above, and an object of the present invention is a three-phase connector integrated stator that is easy to assemble and couple a three-phase connector to a stator and easy to assemble a connector pin to a three-phase connector, and It is to provide an electric compressor including this.

In the three-phase connector-integrated stator of the present invention for achieving the above object, a plurality of teeth are formed extending from a cylindrical core, an insulator is wrapped around the outside of the core and the teeth, and each of the teeth of the insulator A stator including a coil wound on the outside; a motor cover coupled to an upper insulator in the direction of the central axis of the stator and having a connector coupling portion projecting upward from the top plate; and a three-phase connector inserted into and coupled to the connector coupling portion of the motor cover, connected to the three-phase coil of the stator, and formed with a connector pin connection portion upward. It can be made including.

In addition, the connector coupling portion of the motor cover and the three-phase connector may be disposed outside the stator in a radial direction.

In addition, the connector coupling portion of the motor cover is formed at two or more locations with the three-phase connector interposed therebetween, and a plurality of side walls having coupling holes penetrating both sides thereof, respectively, and the three-phase connector is inserted into the coupling hole to form a hooking protrusion. It can be.

In addition, the motor cover has a support portion protruding from an opposite side of the connector coupling portion in the direction of the central axis, and the support portion may be supported by being in contact with an outer circumferential surface of the stator.

In addition, the motor cover may have a guide plate protruding upward from an inner end in a radial direction of the upper plate.

In addition, the motor cover may have a fixing tab protruding from an upper end of the guide plate outward in a radial direction for fixing the lead wire of the three-phase coil.

In addition, a through hole penetrating both upper and lower surfaces may be formed at a position corresponding to the fixing tab in the upper plate of the motor cover.

In addition, the three-phase connector may have a coil lead coupling portion formed on an inner surface in a radial direction and a connector pin coupling portion formed on an upper surface.

In addition, a fixing groove may be formed on an upper surface of the insulator of the stator, and a fixing protrusion protrudes from a lower surface of the motor cover, and the fixing protrusion may be inserted into the fixing groove and coupled thereto.

In addition, the fixing groove is formed in a form connected to an upper surface and an outer side surface in a radial direction at the outer periphery of the upper end of the insulator, and the fixing protrusion protrudes in a form corresponding to the fixing groove from the inside where the top plate and the circumferential wall of the motor cover meet. can be formed

In addition, the fixing protrusion may be formed in a shape in which the width gradually narrows toward the direction in which the fixing protrusion is inserted into the fixing groove.

In addition, a locking groove may be formed on a side surface of the insulator of the stator, and a locking protrusion protrudes from a side surface of the motor cover, so that the locking protrusion may be inserted into the locking groove and coupled thereto.

In addition, a lead-out hole penetrating both upper and lower surfaces may be formed in the upper plate of the motor cover.

In addition, a cable guide wall may protrude from an inner side surface of the connector coupling part in a radial direction, and an end of a lead wire of the three-phase coil of the stator may be inserted into the cable guide wall.

And the electric compressor including the three-phase connector integrated stator of the present invention includes the three-phase connector integrated stator; and a housing in which the three-phase connector-integrated stator is inserted and accommodated. It can be made including.

In addition, a guide part protrudes from an outer surface of the motor cover of the three-phase connector-integrated stator outward in a radial direction, and the housing is connected at the receiving part, which is an internal space into which the stator is inserted, and a guide into which the connector coupling part of the motor cover is inserted. A groove is formed, and a guide portion may be inserted and coupled along the guide groove.

In addition, the connector coupling part of the motor cover may be disposed spaced apart from the guide groove of the housing.

The three-phase connector-integrated stator of the present invention and the electric compressor including the same have advantages in that the three-phase connector can be easily assembled and coupled to the stator, and the position of the three-phase connector can be adjusted, so that the connector pins can be easily assembled into the three-phase connector. there is

1 is a perspective view showing a stator of an electric motor in a conventional electric compressor.
2 to 6 are an assembled perspective view, an exploded perspective view, an upper plan view, a rear view, and a cross-sectional view showing a three-phase connector integrated stator according to an embodiment of the present invention.
7 is a perspective view showing a motor cover of a three-phase connector-integrated stator according to an embodiment of the present invention.
8 and 9 are an exploded perspective view and an upper plan view illustrating a compressor including a three-phase connector integrated stator and a housing according to an embodiment of the present invention.

Hereinafter, a three-phase connector-integrated stator of the present invention having the above configuration and an electric compressor including the same will be described in detail with reference to the accompanying drawings.

2 to 6 are an assembled perspective view, an exploded perspective view, an upper plan view, a rear view, and a cross-sectional view showing a three-phase connector integrated stator according to an embodiment of the present invention, and FIG. 7 is a three-phase connector according to an embodiment of the present invention. It is a perspective view showing the motor cover of the integrated stator.

As shown, the three-phase connector-integrated stator according to one embodiment of the present invention may largely include a stator 100, a motor cover 200, and a three-phase connector 300.

The stator 100 may include a core 110, teeth 120, an insulator 130, and a coil 140. A plurality of teeth 120 extend radially inward from the inner circumferential surface of the cylindrical core 110, and the teeth 120 may be spaced apart from each other by a specific angle in the circumferential direction. In addition, the core 110 and the insulator 130 are coupled in a form surrounding the outside of the teeth 120, and the coil 140 may be wound around the outside of the insulator 130 at each of the teeth 120. In addition, the three-phase lead wires 141 connected to the coil 140 may be extended and drawn near the end turn of the coil. Here, the insulator 130 may be formed in a protruding shape with inner and outer walls spaced apart in a radial direction so that the wound coil 140 does not escape, and the outer wall is circumferential at a position corresponding to the core. can be formed continuously along In addition, the outer wall of the insulator 130 may protrude upward from the inner wall and the wound coil, and the outer wall of the insulator 130 may have a fixing groove 131 concavely formed from the upper surface.

The motor cover 200 may include a top plate 210, a circumferential wall 220, and a connector coupling part 250, and may further include a guide plate 230, a fixing protrusion 240, and a support part 260. can do. The top plate 210 may be formed in a plate-like ring shape, and a cylindrical circumferential wall 220 may extend from the outermost part of the top plate 210 downward in a radial direction. Thus, in the motor cover 200, the outer wall of the insulator 130 is inserted and coupled to the inner side of the circumferential wall 220, and the top plate 210 of the motor cover 200 touches the upper end of the outer wall of the insulator 130 to be supported. can be combined In addition, a connector coupling part 250 may protrude from one side of the top plate 210 toward the top. At this time, the connector coupling part 250 may be disposed radially outward from the outer circumferential surface of the core 110 of the stator 100 in the radial direction. Further, the connector coupling part 250 may be a plurality of side walls protruding upward from the top plate 210, and a three-phase connector may be inserted and fixed to the inside surrounded by the side walls. In addition, a coupling hole 251 penetrating both sides in the thickness direction is formed on the side wall so that the locking protrusion 310 of the three-phase connector 300 can be caught and fixed. In addition, in the motor cover 200, a support portion 260 protrudes from the opposite side of the connector coupling portion 250 in the direction of the central axis, and the support portion 260 is in contact with the outer circumferential surface of the core 110 of the stator 100 to support it. can lose Thus, it is possible to prevent the motor cover 200 from being deformed or damaged by a pressing force when the three-phase connector 300 is inserted into the connector coupling part 250 and coupled thereto. In addition, the guide plate 230 may protrude upward from the radially inner end of the top plate 210, and the fixing tab 231 may protrude outward from the top of the guide plate 230 in the radial direction. . Here, the fixing tab 231 may be spaced apart from the top plate 210 and may be arranged in a plurality so that the fixing tabs 231 are spaced apart from each other in the circumferential direction. In addition, lead holes 213 penetrating both upper and lower surfaces may be formed in the top plate 210 , and lead wires 141 of the coil 140 may be drawn through the lead holes 213 to the upper side of the top plate 210 . can In addition, the lead wires 141 are disposed in the circumferential direction along the space between the top plate 210, the guide plate 230, and the fixing tab 231, and the end of the lead wire 141 is inserted into the three-phase connector 300. It can be. In addition, through-holes 211 penetrating both upper and lower surfaces are formed in the upper plate 210 at positions corresponding to the fixing tabs 231, so that when the motor cover 200 is manufactured through injection molding, the fixing tabs 231 The structure of the mold for molding the shape can be simplified. In addition, the fixing protrusion 240 protrudes from the lower surface of the top plate 210, and the fixing protrusion 240 can be inserted into the fixing groove 131 of the insulator 130 and coupled thereto.

The three-phase connector 300 may have a rectangular parallelepiped shape, and may be coupled by inserting the three-phase connector 300 into the connector coupling portion 250 from an upper portion of the connector coupling portion 250 . In the three-phase connector 300, a protrusion 310 protrudes from a position corresponding to the coupling hole 251 of the connector coupling part 250, and the protrusion 310 is inserted into the coupling hole 251 during coupling. The three-phase connector 300 may not be separated from the connector coupling part 250 by being caught. In addition, in the three-phase connector 300, a coil lead coupling portion 320 is formed on the inner surface in the radial direction, and the end of the lead wire 141 is inserted and coupled to the coil lead coupling portion 320 to electrically can be connected In addition, a connector pin coupling portion 330 may be formed on the upper surface of the three-phase connector 300 , and the connector pin coupling portion 330 may be electrically connected to the coil lead coupling portion 320 . Also, although not shown, connector pins for connection with the inverter unit may be inserted into and coupled to the pin coupling unit 330, and the connector pins may be coupled to the housing through a sealing unit.

Therefore, the 3-phase connector integrated stator of the present invention is easy to assemble and couple the 3-phase connector to the stator, and there may be a gap between the stator and the motor cover and a gap between the connector joint and the 3-phase connector, so the position of the 3-phase connector is slight. It may also be easy to assemble the connector pins to the three-phase connector by being adjustable.

In addition, the motor cover 200 may be coupled to the upper side of the stator 100 and the lower cover 400 may be coupled to the lower side of the stator 100 .

In addition, the fixing groove 131 of the insulator 130 may be formed in a form connected to the outer periphery of the top of the insulator 130 and the outer side in the radial direction, and the fixing protrusion 240 of the motor cover 200 The top plate 210 and the circumferential wall 220 may protrude from the inner side where they meet in a shape corresponding to the fixing groove 131 . Thus, the fixing protrusion 240 may be easily inserted into and coupled to the fixing groove 131 . In addition, since the fixing protrusion 240 is connected to both the upper plate 210 and the circumferential wall 220, the fixing protrusion 240 is more firmly coupled to the motor cover 200, preventing damage to the fixing protrusion. It can be. Here, in a state in which the motor cover 200 is coupled to the insulator 130 of the stator 100 by the fixing protrusion 240 and the fixing groove 131, the motor cover 200 rotates and is perpendicular to the central axis direction. Play and shaking in the direction can be prevented.

In addition, the fixing protrusion 240 may be formed in a form in which the width gradually narrows as it goes toward the direction in which it is inserted into the fixing groove 131, and the fixing groove 131 of the motor cover 200 corresponds to the fixing protrusion 240 can be formed in the form of Thus, it may be easy to couple the motor cover 200 to the insulator 130 .

In addition, a locking groove 132 is formed on the side of the insulator 130 of the stator 100, and a locking protrusion 241 protrudes from the inner surface of the circumferential wall 220 of the motor cover 200, so that the locking protrusion ( 241 may be inserted into the locking groove 132 and coupled thereto. Thus, in a state in which the motor cover 200 is coupled to the insulator 130, the motor cover 200 may not easily fall out toward the opposite side coupled to the insulator 130 in the direction of the central axis.

In addition, a plurality of cable guide walls 252 protrude from the inner side of the connector coupling part 250 in the motor cover 200 in the radial direction, and the end of the lead wire 141 of the three-phase coil of the stator 100. may be inserted between the pair of cable guide walls 252. That is, the end of the lead wire 141 may be inserted into the coil lead coupler 320 of the three-phase connector 300 to be coupled and electrically connected in a state in which the coating is removed. In this case, since the end of the lead wire 141 is inserted between the pair of cable guide walls 252, insulation of the lead wire 141 can be further improved. Here, the cable guide wall 252 also serves to hold the end of the lead wire 141, and the portion where the end of the lead wire 141 is connected to the coil lead coupling part 320 of the three-phase connector 300 It is possible to prevent the lead wire 141 from being disconnected. In addition, the cable guide walls 252 may be formed in three sets to correspond to each lead wire 141 for the three-phase coil by making a pair of one pair.

8 and 9 are an exploded perspective view and an upper plan view illustrating a compressor including a three-phase connector integrated stator and a housing according to an embodiment of the present invention.

As shown, the electric compressor including the three-phase connector-integrated stator of the present invention may include a housing 500 in which the three-phase connector-integrated stator and the three-phase connector-integrated stator are inserted and accommodated. The housing 500 may be formed in a container shape with an upper side open, and the housing 500 is formed in a shape in which the guide groove 520 is connected to the receiving portion 510, which is an internal space into which the stator 100 is inserted. It can be. Here, the guide groove 520 is a space into which the connector coupling portion 250 of the motor cover 200 is inserted. In addition, the guide part 270 of the motor cover 200 may protrude outward in the radial direction from the outer surface of the circumferential wall 220, and the guide part 270 is inserted along the guide groove 520 of the housing 500. It can be. In addition, the guide portion 270 of the motor cover 200 may be formed at two locations adjacent to both sides of the connector coupling portion 250, and the outer distance in the width direction of the pair of guide portions 270 is the connector coupling portion. It may be formed wider than the width of the portion 250. Thus, the connector coupling part 250 may be spaced apart from the guide groove 520 of the housing 500 by the pair of guide parts 270 . Accordingly, when assembling the three-phase connector integrated stator by inserting it into the housing 500, assembly may be improved. In addition, since direct coupling force or vibration may not be transmitted to the connector coupling portion 250, damage prevention during assembly and durability during use may be increased.

The present invention is not limited to the above embodiments, and the scope of application is diverse, and anyone with ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims Of course, various modifications are possible.

100: stator
110: Core 120: Teeth
130: insulator 131: fixing groove
132: locking groove
140: coil 141: lead wire
200: motor cover
210: top plate 211: through hole
213: withdrawal hole 220: circumferential wall
230: guide plate 231: fixed tab
240: fixed protrusion 241: stumbling protrusion
250: connector coupling part 251: coupling hole
252: cable guide wall
260: support part 270: guide part
300: 3-phase connector
310: snag 320: coil lead-out coupling part
330: connector pin coupling part
400: lower cover
500: housing 510: receiving part
520: guide groove

Claims (17)

a stator in which a plurality of teeth are formed extending from a cylindrical core, an insulator is coupled to the outside of the core and the teeth, and includes a coil wound around the outside of the insulator at each of the teeth;
a motor cover coupled to an upper insulator in the direction of the central axis of the stator and having a connector coupling portion projecting upward from the top plate; and
a three-phase connector inserted into and coupled to the connector coupling part of the motor cover, connected to the three-phase coil of the stator, and having a connector pin connection part formed upward;
Three-phase connector integrated stator comprising a.
According to claim 1,
A three-phase connector integrated stator, characterized in that the connector coupling portion of the motor cover and the three-phase connector are disposed outside the stator in the radial direction.
According to claim 1,
The connector coupling portion of the motor cover is formed at two or more locations with the three-phase connector interposed therebetween and is a plurality of side walls each having coupling holes penetrating both sides thereof,
The three-phase connector integrated stator, characterized in that the three-phase connector is inserted into the coupling hole and formed with a locking protrusion.
According to claim 1,
The motor cover has a support portion protruding from the opposite side of the connector coupling portion in the direction of the central axis, and the support portion is in contact with and supported on the outer circumferential surface of the stator.
According to claim 1,
The motor cover is a three-phase connector integrated stator, characterized in that the guide plate protrudes upward from the radially inner end of the top plate.
According to claim 5,
The motor cover is a three-phase connector integrated stator, characterized in that the fixing tab for fixing the lead wire of the three-phase coil protrudes from the top of the guide plate outward in the radial direction.
According to claim 1,
The three-phase connector integrated stator, characterized in that the upper plate of the motor cover is formed with a through hole penetrating both upper and lower surfaces at a position corresponding to the fixing tab.
According to claim 1,
The three-phase connector is a three-phase connector integrated stator, characterized in that the coil lead wire coupling portion is formed on the inner surface in the radial direction, and the connector pin coupling portion is formed on the upper surface.
According to claim 1,
A three-phase connector integrated stator, characterized in that a fixing groove is formed on an upper surface of the insulator of the stator, a fixing protrusion protrudes from a lower surface of the motor cover, and the fixing protrusion is inserted into the fixing groove and coupled.
According to claim 9,
The fixing groove is formed in a form connected to an upper surface and a radially outer side surface of the upper outer periphery of the insulator,
The three-phase connector integrated stator, characterized in that the fixing protrusion protrudes from the inside where the upper plate and the circumferential wall of the motor cover meet in a form corresponding to the fixing groove.
According to claim 9,
The three-phase connector integrated stator, characterized in that the fixing protrusion is formed in a form in which the width gradually narrows as it goes toward the direction in which it is inserted into the fixing groove.
According to claim 1,
A three-phase connector integrated stator, characterized in that a locking groove is formed on a side surface of the insulator of the stator, a locking protrusion protrudes from a side surface of the motor cover, and the locking protrusion is inserted into the locking groove and coupled.
According to claim 1,
A three-phase connector integrated stator, characterized in that the upper plate of the motor cover is formed with a lead-out hole penetrating both upper and lower surfaces.
According to claim 1,
A cable guide wall protrudes from the inner side of the connector coupling portion in the radial direction,
The three-phase connector integrated stator, characterized in that the end of the lead wire of the three-phase coil of the stator is inserted into the cable guide wall.
The three-phase connector integrated stator of any one of claims 1 to 14; and
a housing in which the three-phase connector-integrated stator is inserted and accommodated;
Compressor comprising a.
According to claim 15,
The motor cover of the three-phase connector-integrated stator has a guide portion protruding outward in a radial direction from an outer surface,
The housing is connected in the receiving part, which is an internal space into which the stator is inserted, to form a guide groove into which the connector coupling part of the motor cover is inserted.
Compressor, characterized in that the guide portion is inserted and coupled along the guide groove.
According to claim 15,
Compressor, characterized in that the connector coupling portion of the motor cover is disposed spaced apart from the guide groove of the housing.

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