JP6214991B2 - motor - Google Patents

Description

  The present invention relates to a motor, and more particularly to a motor that forcibly cools a coil portion with a refrigerant.

Conventionally, various methods are known for cooling a motor. For example, there is a method of forcibly cooling the stator coil by arranging a cooling pipe so as to surround the outer peripheral portion of the stator coil and circulating a liquid refrigerant in the cooling pipe.
However, in the method using the cooling pipe, the cooling efficiency is low because the cooling is performed through the cooling pipe instead of directly contacting the stator coil. In addition, due to the presence of a cooling pipe surrounding the stator coil, the stator coil cannot be easily taken out and taken out.

Thus, for example, Patent Document 1 discloses a motor that cools a stator coil without using a cooling pipe.
In this motor, as shown in FIG. 18, an annular refrigerant flow path 3 is formed between a resin mold part 1 in which a stator coil is molded and a housing 2 that covers the outer peripheral part of the stator. The refrigerant is circulated from the refrigerant inlet 4 to the refrigerant outlet 5 in FIG.
In the motor disclosed in Patent Document 1, since the refrigerant flowing through the refrigerant flow path 3 is in direct contact with the resin mold portion 1, the stator coil can be efficiently cooled. Moreover, since there is no cooling pipe surrounding the stator coil, the stator coil can be disassembled and taken out as necessary.

JP-A-2005-354821

However, in the motor of Patent Document 1, as shown in FIG. 18, the refrigerant flowing in from the refrigerant inflow port 4 is divided into a bifurcated flow A and a flow B, each of which is only a half-circumferential portion of the outer peripheral surface of the resin mold portion 1. The refrigerant flows through the refrigerant flow path 3 and is discharged from the refrigerant outlet 5. For this reason, the flow rate of the refrigerant tends to be unbalanced with respect to both flows A and B, and there is a possibility that the cooling efficiency is lowered at the flow path portion where the flow rate of the refrigerant is reduced.
Further, even if the flow rates of the refrigerant in the flow A and the flow B are balanced with each other, the refrigerant flowing in from the refrigerant inlet 4 is divided into two branches, so that the flow rate of the refrigerant is halved, so that it is difficult to achieve high cooling efficiency. Met.
Furthermore, since the refrigerant inlet 4 and the refrigerant outlet 5 are arranged at positions far away from each other, there is a problem that workability in maintenance is lowered.

  The present invention has been made to solve such conventional problems, and provides a motor that has excellent cooling efficiency, can be easily taken out and taken out of a coil portion, and can improve maintenance workability. The purpose is to do.

In the motor according to the present invention, the surface of the coil part is surrounded by the cooling part so that a gap is formed between the surface of the coil part molded by the resin member, and the gap is formed from the refrigerant inlet to the refrigerant outlet. In the motor that forcibly cools the coil part by circulating the refrigerant through the refrigerant flow path, the refrigerant inlet and the refrigerant outlet are arranged adjacent to each other, and the resin member that molds the coil part is made of an elastic material. The partition is located between the inlet and the refrigerant outlet and has a partition part that protrudes toward the inner wall surface of the cooling part. The refrigerant comes into contact with the inner wall surface of the cooling part in a state where the partition part is elastically compressed. The gap located between the inlet and the refrigerant outlet is blocked, and the refrigerant flows back in one direction through the refrigerant channel from the refrigerant inlet to the refrigerant outlet.

  Refrigerant flow paths are formed on both sides of the coil part, and the resin member has partition parts corresponding to the refrigerant flow paths on both sides of the coil part, and each refrigerant flow path from the refrigerant inlet to the refrigerant outlet is provided. The refrigerant can be configured to recirculate in one direction.

Partition portion preferably has a protrusion in contact with the inner wall surface of the cooling unit is elastically deformed.
The protruding portion can form a plate-shaped cross-sectional cantilever beam whose tip is in contact with the inner wall surface of the cooling unit as a free end.
Further, preferably, the protrusion forms a cantilever having a tapered cross-sectional shape that becomes thinner toward the tip.
The partition part preferably has a pair of protrusions close to the refrigerant inlet and the refrigerant outlet, respectively.
In addition, the coil part and the cooling part can each be configured to have a cylindrical shape or a flat plate shape.

  According to the present invention, the refrigerant inlet and the refrigerant outlet are arranged adjacent to each other, and the gap between the refrigerant inlet and the refrigerant outlet is blocked by the partition portion of the resin member that molds the coil portion. Since the refrigerant recirculates in the refrigerant flow path in one direction from the inlet to the refrigerant outlet, it is possible to have excellent cooling efficiency, easy to disassemble and take out the coil portion, and improve maintenance workability.

It is a perspective view which shows the motor which concerns on Embodiment 1 of this invention. 1 is an exploded perspective view of a motor according to Embodiment 1. FIG. 3 is a perspective view showing a coil portion used in the motor according to Embodiment 1. FIG. It is a plane sectional view showing the partition part of a coil part. It is the VV sectional view taken on the line of FIG. 4 is a perspective view showing a cooling unit used in the motor according to Embodiment 1. FIG. 4 is a side cross-sectional view showing a cooling unit used in the motor according to Embodiment 1. FIG. It is a partial side sectional view showing the state where the coil part was surrounded by the cooling part. It is a plane sectional view showing the state where the partition part of the coil part is arranged in the refrigerant channel. FIG. 3 is a perspective view showing a refrigerant flow in the motor according to the first embodiment. FIG. 3 is a plan sectional view showing a refrigerant flow in the motor according to the first embodiment. (A) is a fragmentary sectional view which shows the partition part in the motor of Embodiment 2, (B) and (C) is a fragmentary sectional view which shows the partition part in the motor which concerns on the modification of Embodiment 2, respectively. . FIG. 10 is a partial perspective view showing a partition portion in the motor according to the third embodiment. It is a top sectional view showing the state where the partition part in the motor of Embodiment 3 is arranged in the refrigerant channel. FIG. 6 is a plan sectional view showing a refrigerant flow in a motor according to Embodiment 4; FIG. 10 is a perspective view showing a refrigerant flow in a motor according to Embodiment 5. FIG. 10 is a perspective view showing a refrigerant flow in a motor according to a modification of the fifth embodiment. It is a top sectional view showing the flow of the refrigerant in the conventional motor.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
FIG. 1 shows the configuration of a motor according to Embodiment 1 of the present invention. This motor is a rotational drive type motor that generates rotational torque by electromagnetic force, and includes a cylindrical stator 11 and a movable element 12 that is rotatably arranged inside the stator 11.

As shown in FIG. 2, the stator 11 wraps the plurality of stator coils 13 and the coil portion 14 holding the plurality of stator coils 13 arranged in a ring shape along the circumference of the stator 11. And a cooling part 15 placed on the coil part 14. In the cooling unit 15, a later-described refrigerant flow path for cooling the plurality of stator coils 13 is formed, and a refrigerant supply for circulating the refrigerant through the refrigerant flow path is provided below the stator 11. A port 16 and a refrigerant discharge port 17 are formed adjacent to each other.
On the other hand, the mover 12 has a ring-shaped yoke 18 and a plurality of magnets 19 arranged in an annular shape on the outer periphery of the yoke 18. The outer diameter of the mover 12 is set to a value slightly smaller than the inner diameter of the stator 11 so that the surfaces of the plurality of magnets 19 of the mover 12 face the inner surface of the stator 11 with a slight gap. Further, the mover 12 is inserted into the stator 11 to constitute a motor.

  As shown in FIG. 3, the coil portion 14 of the stator 11 has a metal cylindrical base 20, and a plurality of stator coils 13 are arranged in an annular shape on the base 20 and the silicone. A cylindrical resin mold portion 21 continuous with the base 20 is formed by molding with a resin member made of an elastic material such as resin. That is, the outer surfaces of the plurality of stator coils 13 are sealed by the resin mold part 21. In addition, an annular flange portion 22 that protrudes on both the outer peripheral side and the inner peripheral side is formed integrally with the base 20 at the lower end of the base 20.

  The cylindrical base 20 corresponds to a relatively large circumferential angle and has a main portion 20a having a predetermined thickness in the radial direction, and corresponds to the remaining small circumferential angle and is thinner than the main portion 20a. Divided into a thin portion 20b. In the main part 20 a, the outer diameter of the resin mold part 21 is smaller than the outer diameter of the base 20, and the inner diameter of the resin mold part 21 is larger than the inner diameter of the base 20. That is, the resin mold part 21 is formed thinner than the main part 20a of the base 20, and there is a step between the main part 20a and the resin mold part 21 along the circumference in both the outer peripheral part and the inner peripheral part. Is formed.

However, the thin portion 20b of the base 20 has the same thickness as the resin mold portion 21, and is connected to the surface of the resin mold portion 21 without causing a step at the outer peripheral portion or the inner peripheral portion.
The resin mold portion 21 positioned immediately above the central portion of the thin portion 20b of the base 20 includes a partition portion 23 formed of a protruding portion extending in the axial direction of the coil portion 14 on both the outer peripheral surface side and the inner peripheral surface side. 24. These partition parts 23 and 24 extend from the upper end of the resin mold part 21 to the flange part 22 through the surface of the thin part 20b of the base 20 from the lower end of the resin mold part 21, respectively.

As shown in FIG. 4, these partition portions 23 and 24 each have a rectangular cross-sectional shape, from the surface of the partition portion 23 on the outer peripheral surface side to the surface of the partition portion 24 on the inner peripheral surface side. The thickness D is set to a value slightly larger than the thickness of the main portion 20a of the base 20.
The thin portion 20b of the base 20 is formed with through holes 25 and 26 penetrating the thin portion 20b from the outer peripheral surface to the inner peripheral surface in the thickness direction on both sides of the partition portions 23 and 24, respectively. And as FIG. 5 shows, the through-hole 25 is connected to the refrigerant | coolant supply port 16 arrange | positioned in the lower part of the stator 11 through the vertical hole 27 formed in the thin part 20b. Similarly, the other through hole 26 communicates with the refrigerant discharge port 17 disposed at the lower portion of the stator 11 through a vertical hole formed in the thin portion 20b.

  As shown in FIG. 6, the cooling unit 15 has an overall cylindrical shape corresponding to the coil unit 14, and an annular flange portion 28 that protrudes on both the outer peripheral side and the inner peripheral side is formed at the lower end. Yes. Further, as shown in FIG. 7, a hollow coil housing portion 29 having an open bottom is formed in the cylindrical portion of the cooling portion 15. The length of the coil housing portion 29 in the radial direction, that is, the thickness, has a value substantially equal to the thickness of the base 20 in the portion other than the thin portion 20 a of the coil portion 14.

In a state where the resin mold part 21 and the base 20 of the coil part 14 are accommodated in the coil accommodating part 29 of the cooling part 15, the flange part 28 of the cooling part 15 is fixed to the flange part 22 of the base 20, The stator 11 is assembled.
At this time, in the main portion 20a of the base 20, the coil accommodating portion 29 of the cooling portion 15 has a thickness substantially equal to the thickness of the base 20, so that the cooling portion 15 has a thickness as shown in FIG. The inner wall surface of the coil housing portion 29 can be in close contact with the outer peripheral surface and the inner peripheral surface of the base 20 without generating a gap between the outer peripheral surface and the inner peripheral surface of the base 20.

On the other hand, since the resin mold part 21 has an outer diameter smaller than the outer diameter of the main part 20a of the base 20 and an inner diameter larger than the inner diameter of the main part 20a, the inner wall surface of the coil accommodating part 29 and the resin mold part A gap is formed between the outer peripheral surface and the inner peripheral surface of 21. Due to these gaps, an outer refrigerant channel 30 is formed along the circumferential direction between the inner wall surface of the coil housing part 29 and the outer circumferential surface of the resin mold part 21, and the inner wall surface of the coil housing part 29 and the resin mold are formed. An inner refrigerant flow path 31 is formed along the circumferential direction between the inner peripheral surface of the portion 21.
FIG. 8 also shows the yoke 18 and the magnet 19 of the mover 12 that are rotatably arranged inside the stator 11.

Further, the thickness D from the surface of the partition portion 23 on the outer peripheral surface side of the resin mold portion 21 to the surface of the partition portion 24 on the inner peripheral surface side is set to a value slightly larger than the thickness of the main portion 20a of the base 20. Therefore, a resin member made of an elastic material such as silicone resin is accommodated in the coil accommodating portion 29 of the cooling portion 15 in a state where it is elastically compressed. As a result, as shown in FIG. 9, the entire surfaces of the partition portions 23 and 24 extending from the upper end of the resin mold portion 21 to the flange portion 22 of the base 20 are brought into close contact with the inner wall surface of the coil housing portion 29.
Due to the presence of the partition parts 23 and 24, the outer refrigerant channel 30 and the inner refrigerant channel 31 formed along the circumferential direction are blocked by the partition parts 23 and 24, respectively.

  Further, since the thin portion 20b of the base 20 has the same thickness as the resin mold portion 21, a gap is also formed between the inner wall surface of the coil housing portion 29 and the outer peripheral surface and inner peripheral surface of the thin portion 20b. These gaps communicate with the outer refrigerant channel 30 and the inner refrigerant channel 31, respectively, and the openings at both ends of the through holes 25 and 26 formed in the thin portion 20b of the base 20 respectively correspond to the corresponding outer refrigerant. The flow path 30 or the inner refrigerant flow path 31 is communicated.

Further, since the through hole 25 communicates with the refrigerant supply port 16, among the openings at both ends of the through hole 25, the openings on the outer peripheral surface side of the thin part 20b are the inner parts of the outer refrigerant inlet 32 and the thin part 20b. With the opening on the peripheral surface side as the inner refrigerant inlet 33, the refrigerant supplied from the refrigerant supply port 16 can flow into the outer refrigerant channel 30 and the inner refrigerant channel 31, respectively.
Similarly, since the through hole 26 communicates with the refrigerant discharge port 17, among the openings at both ends of the through hole 26, the openings on the outer peripheral surface side of the thin portion 20b are connected to the outer refrigerant outlet 34 and the thin portion 20b. Using the opening on the inner peripheral surface side as the inner refrigerant outlet 35, the refrigerant in the outer refrigerant channel 30 and the inner refrigerant channel 31 can be allowed to flow out, respectively.

  During operation of the motor, as shown in FIG. 10, with the mover 12 inserted inside the stator 11, a coolant such as pure water is supplied from the coolant supply port 16 and the coolant is discharged from the coolant discharge port 17. While discharging, a field current is passed through the plurality of stator coils 13 of the stator 11 to rotate the mover 12.

At this time, the outer refrigerant flow path 30 formed along the circumferential direction between the inner wall surface of the coil housing portion 29 of the cooling portion 15 and the outer peripheral surface of the resin mold portion 21 is blocked by the partition portion 23. As shown in FIG. 11, the refrigerant supplied via the refrigerant supply port 16 flows into the outer refrigerant flow path 30 from the outer refrigerant inlet 32 without being short-cut to the outer refrigerant outlet 34, and After refluxing the refrigerant flow path 30 in one direction, the refrigerant flows out from the outer refrigerant outlet 34 to the refrigerant outlet 17.
Similarly, the inner refrigerant flow path 31 formed along the circumferential direction between the inner wall surface of the coil accommodating portion 29 of the cooling portion 15 and the inner peripheral surface of the resin mold portion 21 is blocked by the partition portion 24. Therefore, the refrigerant supplied through the refrigerant supply port 16 flows into the inner refrigerant channel 31 without being short-cut from the inner refrigerant inlet 33 to the inner refrigerant outlet 35, and passes through the inner refrigerant channel 31 in one direction. Then, the refrigerant flows out from the inner refrigerant outlet 35 to the refrigerant outlet 17.

Thereby, it becomes possible to cool the plurality of stator coils 13 in the coil section 14 with extremely excellent cooling efficiency.
Further, the outer refrigerant inlet 32 and the outer refrigerant outlet 34 are arranged adjacent to each other via the partition part 23, and the inner refrigerant inlet 33 and the inner refrigerant outlet 35 are arranged adjacent to each other via the partition part 24. Therefore, maintenance can be performed with good workability.
Furthermore, by accommodating the resin mold part 21 and the base 20 of the coil part 14 in the coil accommodating part 29 of the cooling part 15, the outer refrigerant flow path 30 and the inner refrigerant flow path 31 are formed without using a cooling pipe. Therefore, the stator coil 13 can be easily disassembled and taken out.

Embodiment 2
In the first embodiment, as shown in FIG. 4, the partition parts 23 and 24 of the resin mold part 21 have a rectangular cross-sectional shape. However, the present invention is not limited to this.
For example, as shown in FIG. 12A, a partition portion 41 having a triangular or arcuate cross-sectional shape with a sharp tip may be used. With such a shape, when the resin mold part 21 and the base 20 are accommodated in the coil accommodating part 29 of the cooling part 15, the compressed partition part 41 is easily elastically deformed, and the partition part 41 is easily transformed into the coil accommodating part. The refrigerant flow path can be shut off by securely contacting the inner wall surface 29.

Further, as shown in FIG. 12 (B), the partition portion 42 forms a plate-like cross-sectional cantilever, and the tip of the partition portion 42 is brought into contact with the inner wall surface of the cooling portion 15 as a free end. May be. In this way, since the partition part 42 acts as a spring, the partition part 42 is further easily elastically deformed, and the tip of the partition part 42 that is a free end and the inner wall surface of the coil housing part 29 are easily adhered. Can be realized.
Furthermore, as shown in FIG. 12C, if the partition part 43 that forms a cantilever having a tapered cross-sectional shape that becomes thinner toward the tip, the partition part 43 effectively acts as a spring, The tip of the partition part 43 that is a free end is brought into close contact with the inner wall surface of the coil housing part 29.

Embodiment 3
In the first embodiment, the partition part 23 has one rectangular cross-sectional protrusion located between the outer refrigerant inlet 32 and the outer refrigerant outlet 34, and similarly, the partition part 24 is For example, as shown in FIG. 13, the outer peripheral surface side of the resin mold portion 21 is provided with one rectangular cross-sectional protrusion located between the inner refrigerant inlet 33 and the inner refrigerant outlet 35. The partition part 51 may have a pair of protrusions 51a and 51b, and the partition part 52 on the inner peripheral surface side may also have a pair of protrusions 52a and 52b. Each of the protrusions 51a, 51b, 52a, and 52b forms a cantilever having a tapered cross-sectional shape as shown in FIG. 12C, and acts as a spring whose tip is a free end.

As shown in FIG. 14, of the protrusions 51 a and 51 b of the partition 51 on the outer peripheral surface side, the protrusion 51 a is close to the outer refrigerant inlet 32 and the protrusion 51 b is close to the outer refrigerant outlet 34. Yes. Similarly, of the protrusions 52 a and 52 b of the partition portion 52 on the inner peripheral surface side, the protrusion 52 a is close to the inner refrigerant inlet 33 and the protrusion 52 b is close to the inner refrigerant outlet 35.
In this way, the pair of protrusions 51a and 51b reliably block between the outer refrigerant inlet 32 and the outer refrigerant outlet 34, and the pair of protrusions 52a and 52b securely connects the inner refrigerant inlet 33. Since the space between the inner refrigerant outlets 35 is blocked, the reliability of cooling is improved.

As shown in FIG. 14, it is preferable that the pair of protrusions 51a and 51b and the pair of protrusions 52a and 52b are respectively arranged so that the tapered tips face in directions away from each other. Thereby, when each projection part receives a pressure by the refrigerant | coolant which flows through the outer side refrigerant | coolant flow path 30 and the inner side refrigerant | coolant flow path 31, the adhesive force with the inner wall surface of the cooling part 15 will each increase.
The protrusions 51a, 51b, 52a and 52b are not limited to those having a tapered cross-sectional shape, but have a rectangular cross-sectional shape, a triangular or arcuate cross-sectional shape with a sharp tip, or a flat cross-sectional shape. You may have.

Embodiment 4
In the first embodiment, the outer refrigerant flow path 30 and the inner refrigerant flow path 31 are formed on the outer peripheral surface side and the inner peripheral surface side of the resin mold portion 21, respectively, so that the plurality of stator coils 13 in the resin mold portion 21 are both surfaces. However, the present invention is not limited to this, and a plurality of stator coils 13 may be cooled from one side.

FIG. 15 schematically shows the stator of the motor according to the fourth embodiment in which the outer refrigerant passage 30 is formed only on the outer peripheral surface side of the resin mold portion 21. The space between the outer refrigerant inlet 32 and the outer refrigerant outlet 34 is blocked by the partition portion 23, and the refrigerant supplied via the refrigerant supply port 16 flows into the outer refrigerant channel 30 from the outer refrigerant inlet 32, After refluxing the refrigerant flow path 30 in one direction, the refrigerant flows out from the outer refrigerant outlet 34 to the refrigerant outlet 17.
Even if it does in this way, the several stator coil 13 can be cooled efficiently.
Similarly, the inner refrigerant flow path 31 may be formed only on the inner peripheral surface side of the resin mold portion 21, and the plurality of stator coils 13 may be cooled from the inner peripheral surface side.

  The motors according to the first to fourth embodiments described above are all rotationally driven motors that rotate the movable element 12 disposed inside the cylindrical stator 11 around the central axis. Similarly, the present invention can be applied to a linear motor that moves a mover arranged inside a cylindrical stator in the direction of the central axis.

Embodiment 5
FIG. 16 schematically shows the structure of the stator of the planar linear motor according to the fifth embodiment. The stator includes a flat plate-shaped coil portion 61, and flat plate-shaped upper cooling portion 62 and lower cooling portion 63 disposed so as to overlap the upper surface side and the lower surface side of the coil portion 61, respectively.
The upper cooling unit 62 and the lower cooling unit 63 surround the surface of the coil unit 61 so that a predetermined gap is formed between the upper surface and the lower surface of the coil unit 61, respectively. The upper refrigerant inlet 64 and the upper refrigerant outlet 65 are formed adjacent to each other on one side 62a, and the lower part 63a of the lower cooling part 63 faces the same direction as the side part 62a of the upper cooling part 62. A refrigerant inlet 66 and a lower refrigerant outlet 67 are formed adjacent to each other.

  The coil portion 61 includes a plurality of stator coils arranged in a plane and is molded with a resin member made of an elastic material such as silicone resin. Partition portions 68 and 69 made of a resin member for molding the coil portion 61 and projecting toward the inner wall surfaces of the upper cooling portion 62 and the lower cooling portion 63 are formed on the upper surface and the lower surface of the coil portion 61, respectively. Yes.

  The partition part 68 extends from between the upper refrigerant inlet 64 and the upper refrigerant outlet 65 of the side part 62a of the upper cooling part 62 to an intermediate part toward the side part 62b facing the side part 62a, and is elastically compressed. By contacting the inner wall surface of the upper cooling unit 62 in a state where it is in a closed state, the gap formed between the upper surface of the coil unit 61 and the inner wall surface of the upper cooling unit 62 is blocked. Thus, the upper refrigerant from the upper refrigerant inlet 64 toward the side 62b between the upper surface of the coil part 61 and the inner wall surface of the upper cooling part 62 and around the outer side of the partition part 68 to the upper refrigerant outlet 65. A flow path 70 is formed.

  Similarly, the partition part 69 extends from between the lower refrigerant inlet 66 and the lower refrigerant outlet 67 of the side part 63a of the lower cooling part 63 to an intermediate part toward the side part 63b facing the side part 63a. The gap formed between the lower surface of the coil portion 61 and the inner wall surface of the lower cooling portion 63 is blocked by contacting the inner wall surface of the lower cooling portion 63 in an elastically compressed state. . Thereby, between the lower surface of the coil part 61 and the inner wall surface of the lower side cooling part 63, it goes to the side part 63b from the lower side refrigerant | coolant inlet 66, and goes to the lower side refrigerant | coolant outlet 67 around the outside of the partition part 69. A lower refrigerant flow path 71 is formed.

  Therefore, when the refrigerant is caused to flow in from the upper refrigerant inlet 64, the refrigerant is not short-cut from the upper refrigerant inlet 64 to the upper refrigerant outlet 65 due to the presence of the partition part 68, but goes around the outside of the partition part 68 and moves upward. After recirculating through the refrigerant flow path 70 in one direction, the refrigerant flows out from the upper refrigerant outlet 65. Similarly, when the refrigerant flows in from the lower refrigerant inlet 66, the refrigerant is not short-cut from the lower refrigerant inlet 66 to the lower refrigerant outlet 67 due to the presence of the partition part 69, and the outside of the partition part 69. , The lower refrigerant flow path 71 is recirculated in one direction, and then flows out from the lower refrigerant outlet 67.

  A plate-like movable element is arranged on the upper surface side or the lower surface side of such a stator, and the refrigerant flows in from the upper refrigerant inlet 64 and the lower refrigerant inlet 66, and the upper refrigerant outlet 65 and the lower refrigerant outlet. By causing the field current to flow through the plurality of stator coils of the stator while allowing the refrigerant to flow out from 67, the mover can be driven straight.

Thereby, it becomes possible to cool the plurality of stator coils in the coil portion 61 from both the upper surface side and the lower surface side of the coil portion 61 with extremely excellent cooling efficiency.
Further, the upper refrigerant inlet 64 and the upper refrigerant outlet 65 are disposed adjacent to each other via the partition portion 68, and the lower refrigerant inlet 66 and the lower refrigerant outlet 67 are disposed adjacent to each other via the partition portion 69. Therefore, maintenance can be performed with good workability.
Furthermore, since the upper refrigerant flow path 70 and the lower refrigerant flow path 71 are formed without using a cooling pipe, the stator coil can be easily taken out and taken out.

Instead of cooling from the upper surface side and the lower surface side of the coil portion 61, for example, as shown in FIG. 17, only the upper cooling portion 62 is disposed so as to overlap the coil portion 61, and the coil portion 61 is placed on the upper surface side. It can also be set as the structure cooled from the side.
Similarly, only the lower cooling part 63 may be disposed so as to overlap the coil part 61, and the coil part 61 may be cooled from the lower surface side.

  DESCRIPTION OF SYMBOLS 1 Resin mold part, 2 Housing, 3 Refrigerant flow path, 4 Refrigerant inflow port, 5 Refrigerant outflow port, A, B flow, 11 Stator, 12 Movable element, 13 Stator coil, 14, 61 Coil part, 15 Cooling part , 16 Refrigerant supply port, 17 Refrigerant discharge port, 18 Yoke, 19 Magnet, 20 Base, 20a Main part, 20b Thin part, 21 Resin mold part, 22, 28 Flange part, 23, 24, 41, 42, 43, 51 , 52, 68, 69 Partition part, 25, 26 Through hole, 27 Vertical hole, 29 Coil housing part, 30 Outer refrigerant flow path, 31 Inner refrigerant flow path, 32 Outer refrigerant inlet, 33 Inner refrigerant inlet, 34 Outer Refrigerant outlet, 35 inner refrigerant outlet, 51a, 51b, 52a, 52b protrusion, 62 upper cooling part, 62a, 62b, 63a, 63b side part, 3 the lower cooling portion, 64 upper refrigerant inlet, 65 the upper coolant outlet, the lower coolant inlet 66, 67 lower refrigerant outlet, 70 the upper coolant channel 71 lower coolant channel D thickness.

Claims (8)

The surface of the coil part is surrounded by a cooling part so that a gap is formed between the surface of the coil part molded by the resin member, and the refrigerant flow path formed by the gap from the refrigerant inlet to the refrigerant outlet is provided. In the motor for circulating the refrigerant and forcibly cooling the coil part,
The refrigerant inlet and the refrigerant outlet are disposed adjacent to each other,
The resin member that molds the coil part is made of an elastic material , and has a partition part that is located between the refrigerant inlet and the refrigerant outlet and that protrudes toward the inner wall surface of the cooling part,
By contacting the inner wall surface of the cooling part in a state where the partition part is elastically compressed, the gap located between the refrigerant inlet and the refrigerant outlet is blocked, and the refrigerant outlet is connected to the refrigerant outlet. The motor is characterized in that the refrigerant flows back in one direction through the refrigerant flow path. The refrigerant flow paths are formed on both surfaces of the coil part,
The resin member has the partition parts corresponding to the refrigerant flow paths on both sides of the coil part,
The motor according to claim 1, wherein the refrigerant recirculates in one direction through each refrigerant flow path from the refrigerant inlet to the refrigerant outlet. The partition unit has a motor according to claim 1 or 2 has a projection for contact with the elastic deformation on the inner wall surface of the cooling unit. 4. The motor according to claim 3 , wherein the protruding portion forms a plate-shaped cross-sectional cantilever beam whose tip is in contact with the inner wall surface of the cooling unit. The motor according to claim 4 , wherein the protrusion forms a cantilever having a tapered cross-sectional shape that becomes thinner toward the tip. The motor according to any one of claims 3 to 5 , wherein the partition portion includes a pair of protrusions that are close to the refrigerant inlet and the refrigerant outlet, respectively. Said coil portion and said cooling unit, the motor according to any one of claims 1 to 6, each having a cylindrical shape. Said coil portion and said cooling unit, the motor according to any one of claims 1 to 6, each having a flat plate shape.

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