JP5434962B2 - Rotating electric machine, method for manufacturing rotating electric machine, and apparatus provided with rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine, a method for manufacturing the rotating electrical machine, and an apparatus including the rotating electrical machine.

  Conventionally, there is a rotating electrical machine in which a stator core is provided inside a frame. In such a rotating electric machine, a stator coil and a stator core wound around the stator core may be molded with resin (for example, see Patent Document 1).

JP-A-8-47218

  In a rotating electrical machine, it is desirable to be able to efficiently dissipate heat generated from a stator coil during operation. However, in the rotating electric machine of Patent Document 1 in which the stator core and the stator coil are molded with resin, no countermeasures for this heat dissipation have been taken.

  The disclosed technology has been made in view of the above, and an object thereof is to provide a rotating electrical machine capable of improving the cooling efficiency of a stator coil, a method for manufacturing the rotating electrical machine, and an apparatus including the rotating electrical machine.

  In the rotating electrical machine disclosed in the present application, the resin obtained by molding the annular stator core fixed inside the frame and the stator coil provided in the stator core is formed from the end surface in the annular axis direction of the stator core. It has a hole that reaches the outside of the resin.

  According to one aspect of the rotating electrical machine disclosed in the present application, it is possible to improve the cooling efficiency of the stator coil.

FIG. 1 is a schematic diagram illustrating a configuration of a rotating electrical machine according to an embodiment. FIG. 2 is a schematic diagram illustrating the configuration of the rotating electrical machine according to the embodiment. FIG. 3 is a schematic diagram illustrating a mold according to the embodiment. FIG. 4A is a schematic cross-sectional view illustrating the manufacturing method of the rotating electrical machine according to the example. FIG. 4B is a schematic cross-sectional view illustrating the manufacturing method of the rotating electrical machine according to the example. FIG. 4C is a schematic cross-sectional view illustrating the manufacturing method of the rotating electrical machine according to the example. FIG. 4D is a schematic cross-sectional view illustrating the manufacturing method of the rotating electrical machine according to the example. FIG. 5 is an explanatory diagram illustrating an apparatus including the rotating electrical machine according to the embodiment. FIG. 6A is a schematic cross-sectional view illustrating the process of attaching the temperature sensor according to the example. FIG. 6B is a schematic cross-sectional view illustrating the mounting process of the temperature sensor according to the embodiment. FIG. 6C is a schematic cross-sectional view illustrating the mounting process of the temperature sensor according to the embodiment. FIG. 7 is a schematic diagram illustrating a rotating electrical machine in which the stator core according to the embodiment is configured by a plurality of divided cores.

  Hereinafter, embodiments of a rotating electrical machine, a method for manufacturing the rotating electrical machine, and an apparatus including the rotating electrical machine disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by the illustration in the Example shown below.

  First, the configuration of the rotating electrical machine according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 and FIG. 2 are schematic views showing the configuration of the rotating electrical machine 1 according to the embodiment, and FIG. 1 schematically shows a cross section taken along line XX of the rotating electrical machine 1 in FIG.

  Further, FIG. 2 schematically shows a cross section taken along line YY of the rotating electrical machine 1 in FIG. Note that FIG. 2 shows the rotating electrical machine 1 in a state in which a lead wire 34 and a bracket 4 connected to a temperature sensor 33 described later are removed from the viewpoint of facilitating the description.

  As shown in FIGS. 1 and 2, the rotating electrical machine 1 according to the present embodiment includes a frame 2, a stator core 3, a bracket 4, a bearing 5, a shaft 6, a rotor core 8, a position detector 9, and a cover 10. Prepare.

  The rotating electrical machine 1 is linked to an external device (not shown) via a shaft 6. Below, the case where the rotary electric machine 1 is an electric motor and the external device is a load of the electric motor will be described.

  The frame 2 is a casing formed in a cylindrical shape, and the stator core 3 and the rotor core 8 are accommodated therein. The frame 2 is provided with a bracket 4 at the opening end. The outer periphery of the bracket 4 is attached to the open end of the frame 2 and holds the bearing 5 at the inner periphery.

  The stator core 3 is an annular member formed by overlapping a plurality of thin electromagnetic steel plates. The stator core 3 is fixed to the inner peripheral surface of the frame 2 by shrink fitting with the bobbin 3a around which the stator coil 31 is wound. Furthermore, the stator core 3, the bobbin 3a, and the stator coil 31 are molded with a thermosetting resin 32.

  The shaft 6 is held by a bearing 5 so as to be rotatable about the ring axis L of the stator core 3 as a rotation axis. The stator coil 31 is connected to a lead wire 7 for supplying three-phase power for driving the shaft 6. The lead wire 7 is drawn out of the frame 2 through the support member 21 of the frame 2.

  Further, the rotor core 8 is disposed opposite to the inner peripheral side of the stator core 3 via a gap. The rotor core 8 is a cylindrical member formed by overlapping a plurality of thin electromagnetic steel plates, and as an example, a plurality of permanent magnets 81 are arranged on the peripheral surface. The rotor core 8 rotates with the ring axis L of the stator core 3 as a rotation axis.

  The position detector 9 is a rotary encoder, a resolver, or the like that detects the rotational position of the shaft 6. The position detector 9 is connected to a lead wire 91 for outputting a detection result relating to the rotational position of the shaft 6 to a predetermined control device (not shown). The position detector 9 is covered with a cover 10.

  In the rotating electrical machine 1, a rotating magnetic field is generated inside the stator core 3 by flowing a current through the stator coil 31 wound around the stator core 3. The rotor core 8 is rotated by the interaction between the rotating magnetic field and the magnetic field generated by the permanent magnet 81 of the rotor core 8, and the shaft 6 rotates as the rotor core 8 rotates.

  In addition, when the rotary electric machine 1 is a generator, the operation reverse to that of the electric motor is performed. That is, as the shaft 6 rotates, the rotor core 8 rotates and a current is generated in the stator coil 31 of the stator core 3.

  Further, the resin 32 in which the stator core 3, the bobbin 3 a, and the stator coil 31 are molded includes a hole 30 that extends from the end surface of the stator core 3 in the ring axis L direction to the outside of the resin 32. Since the resin 32 provided with the hole 30 has a larger surface area than the resin 32 without the hole 30, the cooling efficiency is high.

  For this reason, in the rotary electric machine 1, the cooling efficiency of the stator coil 31 molded with the resin 32 is improved. Further, since no hole or the like is formed in the end surface of the stator core 3 in the direction of the ring axis L to which the hole 30 reaches, there is no influence on the electromagnetic characteristics given by the hole or the like.

  Further, the hole 30 provided in the resin 32 is penetrated from the end surface in the annular axis L direction of the resin 32 to the end surface in the annular axis L direction of the stator core 3. Thereby, in the rotating electrical machine 1, heat generated from the stator coil 31 during operation is efficiently radiated from the hole 30 to the outside of the resin 32 through the stator core 3.

  Further, as shown in FIG. 2, the holes 30 are opened from a plurality of locations (here, 12 locations) on the peripheral edge of the end surface in the annular axis L direction of the stator core 3 toward the outside of the resin 32. . Thereby, in the rotary electric machine 1, heat can be efficiently radiated from each of the plurality of holes 30.

  Moreover, the plurality of hole portions 30 are provided at equal intervals along the circumferential direction of the stator core 3 with respect to the end surface in the annular axis L direction of the stator core 3. Thereby, in the rotary electric machine 1, since it is possible to dissipate heat uniformly from each part on the end surface in the annular axis L direction of the stator core 3, the heat generated by the stator coil 31 is more efficiently transferred to the outside of the resin 32. Heat can be dissipated.

  A temperature sensor 33 is provided inside one of the plurality of holes 30. Thereby, in the rotating electrical machine 1, the temperature of the stator coil 31 can be detected by the temperature sensor 33.

  Therefore, in the rotating electrical machine 1, the temperature detected by the temperature sensor 33 is monitored by a predetermined control device, and when the temperature exceeds a predetermined threshold, the control device notifies the abnormal heat generation or stops the operation of the rotating electrical machine 1. Can be done.

  Further, as shown in FIG. 2, the temperature sensor 33 is provided in the hole 30 arranged in a region other than the region where the lead wire 7 connected to the stator coil 31 is arranged among the plurality of holes 30. It is done. Thereby, in the rotating electrical machine 1, it is possible to prevent the lead wire 34 connected to the temperature sensor 33 and the lead wire 7 connected to the stator coil 31 from interfering with each other inside the frame 2.

  The temperature sensor 33 may be provided in a plurality of holes 30 selected from all the holes 30. In such a case, the temperature sensors 33 are provided at equal intervals along the circumferential direction of the end surface of the stator core 3 in the ring axis L direction.

  According to such a configuration, it becomes possible to detect the temperature distribution of the plurality of stator coils 31 arranged in an annular shape. For this reason, according to the rotating electrical machine 1, even if some of the stator coils 31 cause abnormal heat generation, the temperature sensor 33 corresponding to the stator coil 31 that has caused such abnormal heat generation appropriately generates abnormal heat generation. Can be detected.

  Further, the hole portion 30 is provided such that the hole axis direction is parallel to the ring axis L direction of the stator core 3. For this reason, the operator who installs the temperature sensor 33 visually confirms the resin 32 inside the frame 2 from the direction of the ring axis L of the frame 2 before fitting the bracket 4 to the frame 2, so The position of the part 30 can be easily confirmed. Thereby, workability | operativity of the attachment work of the temperature sensor 33 improves.

  The hole axis direction of the hole portion 30 is preferably parallel to the ring axis L direction of the stator core 3, but is not necessarily parallel to the ring axis L direction.

  Further, when the stator core 3, the bobbin 3 a and the stator coil 31 are molded with the resin 32, the resin 32 is provided so as to protrude by a predetermined length from the frame 2 in the direction of the ring axis L. The portion 32a protruding from the frame 2 of the resin 32 functions as a positioning member for the mounting position when the bracket 4 is attached.

  Thereby, the operator who installs the bracket 4 can simply attach the bracket 4 to the portion 32a protruding from the frame 2 without performing complicated positioning.

  Moreover, the resin 32 includes a plurality of holes 30 as described above. For this reason, for example, even when the diameter of the portion 32a protruding from the frame 2 is slightly larger than the diameter of the bracket 4, the hole 30 is deformed when fitting the bracket 4 and functions as a stress relief. The bracket 4 can be fitted to the resin 32.

  That is, in the rotating electrical machine 1, when the diameter of the portion 32 a protruding from the frame 2 is slightly larger than the diameter of the bracket 4, the bracket 4 can be used without performing complicated work such as processing to reduce the diameter of the portion 32 a. Can be installed.

  Next, a mold used for molding the stator core 3 and the stator coil 31 will be described with reference to FIG. FIG. 3 is a schematic diagram illustrating a mold 100 according to the embodiment.

  As shown in FIG. 3, the mold 100 is formed by an annular (donut-shaped) bottom surface 101, an inner wall 103 erected from the inner periphery of the bottom surface 101, and an outer wall 104 erected from the outer periphery of the bottom surface 101. It is equipped with a space.

  Further, the bottom surface 101 has an outer periphery larger than the outer diameter of the cylindrical frame 2 and an inner periphery smaller than the inner diameter of the stator core 3. Furthermore, a plurality of support pins 102 that support the end surface in the annular axis L direction of the stator core 3 are erected on the bottom surface 101. The plurality of support pins 102 are provided at equal intervals along the circumferential direction of the bottom surface 101 at the peripheral edge of the bottom surface 101.

  In FIG. 3, the bottom surface 101 of the mold 100 is illustrated as a plane from the viewpoint of simplifying the description, but the bottom surface 101 of the mold 100 is formed in an arbitrary shape according to the design of the rotating electrical machine 1. The

  And in the manufacturing method of the rotary electric machine 1 which concerns on an Example, after loading the flame | frame 2 by which the stator core 3 was shrink-fitted inside to the metal mold | die 100, the thermosetting resin 32 was filled into the metal mold | die 100. FIG. The mold 100 is heated. As a result, the resin 32 is cured, and the stator core 3, the bobbin 3 a and the stator coil 31 are molded with the resin 32. Details of the manufacturing process for molding the stator core 3, the bobbin 3a, and the stator coil 31 with the resin 32 will be described later with reference to FIGS. 4A, 4B, 4C, and 4D.

  Next, a method for manufacturing the rotating electrical machine 1 according to the embodiment will be described with reference to FIGS. 4A, 4B, 4C, and 4D. Below, the manufacturing process which molds the stator core 3, the bobbin 3a, and the stator coil 31 with the resin 32 is demonstrated, and since it is the same as that of the manufacturing method of a general rotary electric machine about other manufacturing processes, description is abbreviate | omitted. To do.

  4A, 4B, 4C, and 4D are schematic cross-sectional views illustrating a method for manufacturing the rotating electrical machine 1 according to the embodiment. The mold 110 used in the steps described below has the same shape as the mold 100 shown in FIG. 3 except that the bottom surface 111 is processed into a predetermined shape.

  That is, as shown in FIG. 4A, the mold 110 includes a donut-shaped bottom surface 111 on which a support pin 112 is erected, an inner wall 113 that is erected from the inner periphery of the bottom surface 111, and an outer periphery of the bottom surface 111. A space formed by the outer wall 114 formed.

  When the stator core 3, the bobbin 3a, and the stator coil 31 of the rotating electrical machine 1 are molded with the resin 32 using the mold 110, as shown in FIG. 4B, the stator coil 31 is wound around. The frame 2 in which the child core 3 is shrink-fitted is loaded into the mold 110.

  Specifically, the frame 2 is connected to the ring axis L of the stator core 3 so that the ring axis in the annular space formed by the bottom surface 111, the inner wall 113 and the outer wall 114 coincides with the ring axis L of the stator core 3. It is loaded into the mold 110 from the direction.

  At this time, the end surface of the stator core 3 in the direction of the ring axis L (in FIG. 4B, the lower end surface of the stator core 3) is supported by the support pins 112 erected on the bottom surface 111 of the mold 110.

  Subsequently, the opening at the top of the mold 110 is closed by the lid 120. The lid body 120 is a member whose bottom surface is processed into a predetermined shape in advance, and an introduction hole 121 for introducing the resin 32 into the mold 110 is formed.

  Subsequently, as illustrated in FIG. 4C, the resin 32 is introduced into the mold 110 from the introduction hole 121 of the lid 120, and the resin 32 is filled into the mold 110. Then, the mold 110 and the lid 120 are heated. As a result, the resin 32 is cured, and the stator core 3, the bobbin 3 a and the stator coil 31 are molded with the resin 32.

  At this time, even if the frame 2 is thermally expanded by the heat of the heated mold 110 and the inner diameter of the frame 2 is enlarged, the lower end surface of the stator core 3 is supported by the support pins 112 in the mold 110. Therefore, the stator core 3 can be prevented from being displaced in the direction of the ring axis L due to the introduction pressure of the resin 32 or the like. Thereby, in the manufacturing method which concerns on an Example, it can prevent that the relative position with respect to the ring-axis L direction of the flame | frame 2 and the stator core 3 arises.

  Subsequently, in the manufacturing method according to the embodiment, as illustrated in FIG. 4D, the frame 2 in which the stator core 3, the bobbin 3 a, and the stator coil 31 are molded with the resin 32 is taken out from the mold 110. As a result, a hole 30 that extends from the end surface in the annular axis L direction of the stator core 3 to the outside of the resin 32 is formed at a location corresponding to the support pin 112 in the resin 32.

  As described above, in the manufacturing method according to the embodiment, the hole 30 is formed in the process of molding with the resin 32, and therefore the heat remaining in the resin 32 when the frame 2 after molding is taken out from the mold 110. Can be radiated not only from the outer surface of the resin 32 but also from the hole 30.

  Next, an apparatus including the rotating electrical machine 1 according to the embodiment will be described with reference to FIG. FIG. 5 is an explanatory diagram illustrating an apparatus 200 including the rotating electrical machine 1 according to the embodiment. In FIG. 5, the arrangement position of the rotating electrical machine 1 inside the apparatus 200 is shown. FIG. 5 shows the same cross section as that of the rotating electrical machine 1 shown in FIG.

  As shown in FIG. 5, the apparatus 200 includes the rotating electrical machine 1 inside. In the case of such an apparatus 200, heat generated from the stator coil 31 is easily trapped inside the frame 2 of the rotating electrical machine 1, but since the resin 32 of the rotating electrical machine 1 includes a plurality of holes 30, Heat can be efficiently radiated from the outer surface and the hole 30 to the outside.

  Further, in the rotating electrical machine 1 provided inside the apparatus 200, the temperature sensor 33 is provided in the hole 30 arranged on the center point side in the internal space of the apparatus 200. When manufacturing the device 200, for example, after the rotating electrical machine 1 is installed inside the device 200, the temperature of the hole 30 having the closest distance to the center point in the internal space of the device 200 is the temperature among the plurality of holes 30. The sensor 33 is attached.

  In addition, the temperature sensor 33 is previously attached to the predetermined hole 30, and the rotating electrical machine 1 is configured so that the distance from the hole 30 to which the temperature sensor 33 is attached to the center point in the internal space of the apparatus 200 is the shortest. The installation angle may be adjusted.

  Thus, by providing the temperature sensor 33 in the hole 30 arranged on the center point side in the internal space of the apparatus 200, the hole arranged in the vicinity of the center point of the internal space where a relatively high temperature is expected. The temperature of the stator coil 31 can be detected from the part 30 through the stator core 3.

  Therefore, in the apparatus 200, the temperature of the stator coil 31 is increased when the temperature in the hole 30 provided with the temperature sensor 33 exceeds the predetermined threshold before the temperature in the other hole 30 exceeds the predetermined threshold. Since abnormal heat generation can be detected quickly, reliability can be improved.

  In addition, when the fan and ventilation path for cooling internal space are provided in the inside of the apparatus 200, the temperature sensor 33 is located in the hole 30 arrange | positioned in the vicinity of the position which becomes the most leeward in internal space. It may be provided.

  Accordingly, the abnormal heat generation of the stator coil 31 can be detected earlier by detecting the temperature near the position where the temperature is expected to be relatively high in the internal space of the apparatus 200 by the temperature sensor 33. Is possible.

  In addition, in the case where the position where the temperature is relatively high in the internal space of the device 200 is other than the vicinity of the center point of the internal space, the hole 30 disposed in the vicinity of the position where the temperature is relatively high A temperature sensor 33 may be provided.

  Although the case where the hole 30 provided in the resin 32 has a cylindrical shape has been described so far, the shape of the hole 30 is not limited to a cylindrical shape. For example, the hole 30 in which the temperature sensor 33 is provided may have a funnel-shaped opening facing the outside of the resin 32.

  Next, the process of attaching the temperature sensor 33 to the hole 30a in which the opening is formed in a funnel shape will be described with reference to FIGS. 6A, 6B, and 6C. 6A, 6B, and 6C are schematic cross-sectional views illustrating a process for attaching the temperature sensor 33 according to the embodiment.

  As shown in FIG. 6A, among the plurality of holes 30, the hole 30 a provided with the temperature sensor 33 may have a funnel-like opening facing the outside of the resin 32. When attaching the temperature sensor 33 to the hole 30a in which the opening is formed in a funnel shape, first, the temperature sensor 33 is inserted into the hole 30a as shown in FIG. 6B.

  Subsequently, as shown in FIG. 6C, the heat-resistant adhesive 35 is poured into the hole 30a in which the temperature sensor 33 is inserted, and the volume of the adhesive 35 in the hole 30a is increased so that the adhesive 35 is The flow of the adhesive 35 is stopped when it begins to accumulate in the funnel-shaped opening. And the temperature sensor 33 is fixed in the hole 30a by solidifying the adhesive 35 poured into the hole 30a.

  In this manner, by forming the opening of the hole 30a to which the temperature sensor 33 is attached in a funnel shape in advance, when the adhesive 35 is poured into the hole 30a, a sufficient amount of adhesion is applied to the hole 30a. It can be easily determined whether or not the agent 35 has been poured.

  Further, according to the hole 30a, even if the amount of the poured adhesive 35 is slightly large, it is possible to store the excessive amount of the adhesive 35 in the funnel-shaped opening. It is possible to prevent the adhesive 35 from overflowing from the portion 30a and adhering to other members.

  Heretofore, the rotating electrical machine 1 in which the stator core 3 is integrally formed in the circumferential direction has been described, but the stator core 3 may be configured by a plurality of divided cores. Next, a case where the stator core is constituted by a plurality of divided cores will be described with reference to FIG.

  FIG. 7 is a schematic diagram illustrating a rotating electrical machine 1 a in which the stator core according to the embodiment is configured by a plurality of divided cores 36. In addition, in the rotary electric machine 1a shown in FIG. 7, the same code | symbol is attached | subjected about the component same as the rotary electric machine 1 shown in FIG. In FIG. 7, the rotary electric machine 1 a from which the resin 32 is partially excluded is illustrated in order to explain the split core 36.

  As shown in FIG. 7, the stator core of the rotating electrical machine 1 a is configured by a plurality of divided cores 36 that can be divided in the circumferential direction. In such a stator core, a bobbin 3a around which a stator coil 31 is wound is mounted on each divided core 36.

  Therefore, in the case of the rotating electrical machine 1 a including the split core 36, a hole 30 is provided for each split core 36 in the resin 32 in which the split core 36, the bobbin 3 a and the stator coil 31 are molded. Thereby, in the rotating electrical machine 1 a, heat generated by each stator coil 31 wound around each divided core 36 can be radiated from the hole 30 corresponding to each divided core 36.

  In the case of the rotating electrical machine 1 a including the split core 36, each hole 30 is provided so as to reach the outside of the resin 32 from the circumferential central portion 37 of each split core 36 on the end surface in the annular axis L direction of the stator core. .

  Thereby, according to the rotary electric machine 1a, since it can radiate | emit equally from the circumferential direction center part 37 in each division | segmentation core 36, the heat emitted by each stator coil 31 is efficiently carried out to the exterior of the resin 32, respectively. Heat can be dissipated.

  By the way, when providing the hole 30 shown in FIG. 7, the mold | die by the resin 32 is used using the metal mold | die with which the support pin which supports the circumferential direction center part 37 in the annular-axis L direction end surface of each division | segmentation core 36 was provided in the bottom face. Do.

  For this reason, when the mold 32 is filled with the resin 32, each of the split cores 36 on the end surface in the annular axis L direction of the stator core is supported by the circumferential center portion 37 by the support pins provided on the bottom surface of the mold.

  Thereby, in the rotating electrical machine 1a, when molding with the resin 32, even if the frame 2 is thermally expanded by the heat of the heated mold and the inner diameter of the frame 2 is enlarged, each divided core 36 is in the direction of the ring axis L. It is possible to prevent slippage.

  In addition, each division | segmentation core 36 may be comprised by the division | segmentation core which can be further divided | segmented to the radial direction of a stator core. That is, each divided core may be constituted by an inner core that constitutes the inner peripheral portion of the stator core and an outer core that constitutes the outer peripheral portion. In such a case, a hole 32 corresponding to each of the inner core and the outer core is provided in the resin 32 in which the stator core and the stator coil 31 are molded.

  In addition, when the split core is comprised by the inner core and the outer core, it molds with the resin 32 using the metal mold | die with which the support pin which supports each inner core and each outer core was standingly arranged by the bottom face. Thereby, when performing molding, each inner core and each outer core can be prevented from shifting in the direction of the ring axis L with respect to the frame 2.

  In the above-described embodiment, the case where the temperature sensor 33 is provided in the hole 30 has been described. However, a vibration sensor that detects the vibration of the rotating electrical machine 1 may be provided in the hole 30 where the temperature sensor 33 is not provided. . Thus, in the rotating electrical machine 1 according to the embodiment, the vibration sensor can be installed without providing a space for installing the vibration sensor.

  In the above-described embodiments, the thermosetting resin 32 is used. However, the resin 32 may be a thermoplastic resin. In this case, in the rotating electrical machine 1, when the stator core 3, the bobbin 3 a and the stator coil 31 are molded with the resin 32 at the time of manufacture, the temperature of the resin 32 heated and softened by the hole 30 is lowered and cured. It is possible to reduce the time required for the manufacturing, and the manufacturing time is reduced.

L Ring shaft 1, 1a Rotating electrical machine 2 Frame 3 Stator core 3a Bobbin 30, 30a Hole 31 Stator coil 32 Resin 33 Temperature sensor 35 Adhesive 36 Divided core 37 Central part in the circumferential direction 4 Bracket 6 Shaft 7, 34, 91 Lead wire 8 Rotor core 81 Permanent magnet 100, 110 Mold 101, 111 Bottom surface 102, 112 Support pin 103, 113 Inner wall 104, 114 Outer wall 200 Device

Claims (13)

An annular stator core around which a stator coil is wound;
A rotor that is provided on the inner peripheral side of the stator core, and that rotates together with the shaft around the ring axis of the stator core;
A position detector provided on the opposite side of the rotor to detect the rotational position of the shaft;
And a resin for molding the stator core and the stator coil is fixed to the inside of the frame,
The resin is
Of the end face on the annular axial direction side and the end face on the anti-load side in the stator core, there is a hole that reaches from the end face on the anti-load side where the position detector is provided to the outside of the resin. Rotating electric machine. The rotating electrical machine according to claim 1, comprising a plurality of the hole portions. The hole is
3. The rotating electrical machine according to claim 1, wherein openings are made from a plurality of peripheral portions on an end surface in the annular axis direction of the stator core toward the outside of the resin. The hole is
The rotating electrical machine according to any one of claims 1 to 3, wherein a hole axis direction is provided in parallel to the ring axis direction. The stator core is
Consists of multiple split cores,
The hole is
The rotating electrical machine according to any one of claims 1 to 4, wherein the rotating electrical machine is provided for each of the divided cores. The hole is
The rotating electrical machine according to claim 5, wherein the rotating core reaches the outside of the resin from a circumferential center of the split core on the end surface in the annular axis direction of the stator core. The resin is
Having a portion protruding in the direction of the annular axis from the end surface in the axial direction of the frame;
The rotating electric machine is
The rotating electrical machine according to any one of claims 1 to 6, further comprising a bracket that is provided on an end surface side of the frame in an annular axis direction and covers an outer periphery of a protruding portion of the resin. The rotating electrical machine according to any one of claims 1 to 7, wherein a temperature sensor is provided in the hole. The hole is
From the annular axial end surface of the stator core to a midway portion toward the opening facing the outside of the resin is formed in a cylindrical shape, and formed in a funnel shape in which the hole diameter increases from the midway portion to the opening portion. The rotating electrical machine according to claim 8, wherein the temperature sensor is fixed by an adhesive filled in the interior . The temperature sensor is
10. The rotating electrical machine according to claim 8, wherein the rotating electrical machine is provided in the hole portion disposed outside the region where the lead wire of the stator coil is disposed. The stator is disposed on the annular bottom surface having an outer periphery larger than an outer diameter of a cylindrical frame in which an annular stator core provided with a stator coil is fixed, and an inner periphery smaller than an inner diameter of the stator core. A support pin that supports an end surface of the core on the side opposite to the axial direction in the axial direction is erected, and is formed by an inner wall that is erected from the inner periphery of the bottom surface, an outer wall that is erected from the outer periphery of the bottom surface, and the bottom surface. Loading the frame into a mold having a space from the side that is on the side opposite to the annular axis direction;
Filling the mold loaded with the frame with resin and molding the stator core and the stator coil ;
By removing the frame from the mold, the resin in which the stator core and the stator coil are molded is rotated between the end surface on the annular axial load side and the end surface on the anti-load side of the stator core. Forming a hole extending from the end face on the side opposite to the load to the outside of the resin provided with a position detector for detecting the rotational position of the shaft that rotates together with the child . An annular stator core around which a stator coil is wound;
A rotor that is provided on the inner peripheral side of the stator core, and that rotates together with the shaft around the ring axis of the stator core;
A position detector provided on the opposite side of the rotor to detect the rotational position of the shaft;
And a resin for molding the stator core and the stator coil is fixed to the inside of the frame the rotating electrical machine is provided,
The resin is
Of the end face on the annular axial direction side and the end face on the anti-load side in the stator core, there is a hole that reaches from the end face on the anti-load side where the position detector is provided to the outside of the resin. A device equipped with a rotating electrical machine. The rotating electric machine is
Provided inside the device,
The apparatus provided with the rotating electrical machine according to claim 10, wherein a temperature sensor is provided in the hole disposed on a center point side in the internal space of the apparatus.

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