JP5786953B2 - Rotating electric machine and vehicle - Google Patents

Description

  An embodiment of the disclosure relates to a rotating electrical machine and a vehicle including the same.

  In a rotating electrical machine equipped with a circuit such as a winding switching circuit, there is known one in which a flow path through which a coolant flows is formed separately for a circuit and a motor (for example, see Patent Document 1).

JP 2011-147253 A

  However, when the flow paths are separately formed for the circuit and the motor, there are cases where separate parts or the like are required to connect the respective flow paths, and the structure tends to be complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a rotating electrical machine capable of simplifying the structure and a vehicle including the same.

In order to solve the above problems, according to one aspect of the present invention, a frame in which a flow path through which a coolant flows is formed, a stator provided on an inner periphery of the frame, and an outer periphery of the frame A plurality of circuit parts provided, and the flow path includes a first flow path portion whose inner side faces the stator and outer side faces the plurality of circuit parts, and the stator in a circumferential direction. have a, a second flow passage portion formed so as to surround the said plurality of circuit components, the rotary electric machine disposed on the outer periphery of the frame along the bent shape of the first flow path portion Applies.

Moreover, according to another viewpoint of this invention, the vehicle provided with said rotary electric machine is applied.

  According to the present invention, the structure of the rotating electrical machine can be simplified.

It is a perspective view of the rotary electric machine which concerns on one Embodiment. It is a perspective view of the rotary electric machine which concerns on one Embodiment. It is a sectional side view of the rotary electric machine which concerns on one Embodiment. It is a perspective view of the frame concerning one embodiment. It is a perspective view of the frame concerning one embodiment. It is a rear view of the rotary electric machine which concerns on one Embodiment. It is a figure for demonstrating the arrangement configuration of the electrical component in a 2nd accommodating part. It is the figure which looked at the flame | frame for demonstrating the shape of the flow path which concerns on one Embodiment from the upper surface. It is the figure which looked at the flame | frame for demonstrating the shape of the flow path which concerns on one Embodiment from the right side surface. It is the figure which looked at the flame | frame for demonstrating the shape of the flow path which concerns on one Embodiment from the bottom face. It is the figure which looked at the flame | frame for demonstrating the shape of the flow path which concerns on one Embodiment from the left side surface. It is the figure which looked at the flame | frame for demonstrating the shape of a 1st flow-path part from the upper surface. It is a longitudinal cross-sectional view by the XX cross section in FIG. It is the longitudinal cross-sectional view by the XI-XI cross section in FIG. It is a perspective view of the rotary electric machine which shows the state which removed the attachment flange. It is a conceptual diagram of the vehicle carrying a rotary electric machine.

  Hereinafter, an embodiment will be described with reference to the drawings. In the following description, the up-down direction, the front-rear direction, and the left-right direction correspond to the arrow directions shown as appropriate in each drawing. These directions are used for convenience of explanation, but are changed depending on the installation mode of the rotating electric machine, and the configuration is not limited.

<Schematic configuration of rotating electrical machine>
First, a schematic configuration of the rotating electrical machine 1 according to the present embodiment will be described. As shown in FIGS. 1 to 3, the rotating electrical machine 1 mainly includes a shaft 10, a rotor 11, a stator 12, a frame 13, a mounting flange 14, an anti-load side bracket 15, a resolver 16, and a first housing cover 17. , A second housing part cover 18, a winding switching circuit 20, and bearings 30 and 31. The rotating electrical machine 1 may be either an electric motor or a generator.

  The rotor 11 is made of a permanent magnet, for example, and is provided on the outer periphery of the shaft 10. The inner periphery of the stator 12 faces the outer periphery of the rotor 11 via a gap, and the outer periphery of the stator 12 is fixed to the inner peripheral surface of the frame 13. A flow path 135 through which a coolant such as water flows is formed inside the frame 13, and the stator 12 can be cooled by the flow path 135.

  Although not particularly illustrated, the stator 12 includes two sets of windings configured by winding three windings corresponding to each phase of the three-phase AC in parallel. When three-phase alternating current is supplied to only one of these windings, since the impedance is low, a sufficient current can flow even in a high frequency region, which is suitable for driving the rotating electrical machine 1 at high speed. . In addition, when two sets of windings are connected in series and three-phase alternating current is supplied to the whole, a sufficient voltage can be applied even in the low frequency region because of the high impedance, and rotation is performed for the same current. A large torque can be generated in the electric machine 1, which is suitable for driving at a low speed.

  The frame 13 is made of a casting formed by a casting technique, and has a substantially bottomed cylindrical shape that integrally includes a load side bracket 130 on the front side (load side) and is open on the rear side (counter load side). doing. A bearing 30 is provided inside the load side bracket 130. An anti-load side bracket 15, which is a separate body from the frame 13, is provided at an open portion on the rear side of the frame 13. A bearing 31 and a resolver 16 are provided inside the anti-load side bracket 15. A mounting flange 14 is detachably provided on the front side of the load side bracket 130 of the frame 13. Details of the mounting flange 14 will be described later.

<Symmetrical structure of the frame>
Next, the symmetrical structure of the frame 13 will be described. As shown in FIGS. 4 and 5, the frame 13 has a plurality of openings. Specifically, as shown in FIG. 4, an inflow port 136 for allowing the cooling liquid to flow in from the outside, an outflow port 137 for flowing the cooling liquid to the outside, and the power cable 122 (see FIG. 1 and the later-described FIG. 7) are formed with a cable port 138 for drawing out to the outside, and a circuit port 139 for drawing out circuit lines 204 (see FIG. 1 and FIG. 2) made up of signal lines and power lines. . FIG. 4 shows a state where the pipes 32 are connected to the inlet 136 and the outlet 137, respectively. Hereinafter, the inlet 136, the outlet 137, the cable port 138, and the circuit port 139 are collectively referred to as “openings 136 to 139” as appropriate.

  On the other hand, as shown in FIG. 5, the right side surface of the frame 13 has a portion 136 a having a shape corresponding to the inflow port 136, a portion 137 a having a shape corresponding to the outflow port 137, and a shape corresponding to the cable port 138. A portion 138a and a portion 139a corresponding to the circuit port 139 are formed. The portions 136 a and 137 a are openings having substantially the same shape as the inlet 136 and the outlet 137, and are both closed by the closing member 33. Moreover, the said part 138a, 139a is formed as a protrusion part protruded from the surface of the flame | frame 13 so that the cable port 138 or the circuit port 139 can be formed.

  As shown in FIG. 6, the openings 136 to 139 and the portions 136a, 137a, 138a, and 139a having shapes corresponding to these openings are substantially symmetrical with respect to a cutting plane P that cuts the frame 13 in the axial direction. It is formed to become. The cut surface P is a cut surface when the frame 13 is cut in half in the vertical direction, and also includes the rotation axis O of the rotor 11 (shaft 10) as shown in FIG. That is, the frame 13 is formed in a shape (symmetrical shape) that is substantially symmetric with respect to the cut surface P.

  By making the frame 13 symmetrical in this way, the openings 136 to 139 described above can be arranged on either the right side surface or the left side surface of the frame 13 without changing the mold. For example, for the cable port 138 and the circuit port 139, when the frame 13 is cast, protrusions are formed on both the left and right sides so as to be substantially symmetrical with respect to the cut surface P, and the protrusions on the side surfaces on the side to be used are formed. By forming the opening, the arrangement of the cable port 138 and the circuit port 139 can be freely determined. In addition, for the inlet 136 and the outlet 137, when the frame 13 is cast, openings are formed on both sides so as to be substantially symmetric with respect to the cut surface P, and openings on the side that is not used are formed. By closing with the closing member 33, the arrangement of the inlet 136 and outlet 137 can be determined freely.

  As shown in FIGS. 4 and 5, in addition to the openings 136 to 139, two discharge ports 1361 are formed on the left and right side surfaces and two on the bottom surface on the lower side. These four discharge ports 1361 are openings for discharging the core forming the flow path 135, and these are also formed so as to be substantially symmetrical with respect to the cut surface P. All the discharge ports 1361 are closed by the closing member 34.

<Structure of frame housing part>
Next, the structure of the accommodating part of the frame 13 will be described. As shown in FIGS. 3 and 4, a first housing part (circuit housing part) 131 that houses the winding switching circuit 20 is formed on the radial direction side (upper side) of the frame 13. The winding switching circuit 20 is a circuit that controls how the two sets of windings included in the stator 12 described above are connected and supplied to the three-phase AC power supplied from the outside. As shown in FIGS. 1 and 2, the first housing 131 is covered with a first housing cover 17 that can be attached to and detached from the frame 13. The first accommodating portion cover 17 is fixed to the frame 13 by fastening a plurality of edges (four in this example) with bolts 35.

  As shown in FIG. 3, a second housing portion (winding housing portion) 132 is formed on the rear side (the antiload side) of the frame 13 with respect to the antiload side bracket 15. The second accommodating portion 132 accommodates electrical components such as the resolver 16, the winding cable connecting portion 121, the power cable 122, and the terminal block 123. As shown in FIGS. 1 and 6, the second housing portion 132 is covered with a second housing portion cover 18 that can be attached to and detached from the frame 13. The second accommodating portion cover 18 is fixed to the frame 13 by fastening a plurality of edges (four in this example) with bolts 36.

  The frame 13 is integrally formed by casting in such a shape that has the first housing portion 131 and the second housing portion 132 on the outer circumferences on the radial direction side and the anti-load side, respectively. As shown in FIGS. 3 and 4, the first housing portion 131 and the second housing portion 132 are connected by an opening 134 formed by a bridge 133. The bridge 133 constitutes a part of the mounting surface of the first housing portion cover 17 and the second housing portion cover 18 and also serves as a beam that maintains the strength behind the frame 13.

  As shown in FIG. 3, the winding switching circuit 20 includes circuit components (electrical components) such as an IGBT 201, a diode 202, a bus bar 203, a substrate 204, and a plurality of elements 205 mounted on the substrate 204. The diodes 202 are configured in two sets corresponding to the two sets of windings included in the stator 12 described above, and these two sets of diodes 202 are arranged in parallel in the left-right direction (see the drawings described later). 8A). Among the circuit components, the IGBT 201, the diode 202, the bus bar 203, and the like, which are heat generating components, are attached to the outer peripheral surface of the frame 13 in the first housing part 131 and cooled by the flow path 135. The bus bar 203 connects the diode 202 and the connection part 121 of the winding cable of the stator 12, and is provided in the opening 134. The bus bar 203 has an insulating part around a copper bar (not shown) that generates heat, and is attached to the frame 13 through the insulating part.

  FIG. 7 shows an arrangement configuration of electrical components in the second housing portion 132. In FIG. 7, the frame 13 (including the bridge 133) is not shown. As shown in FIG. 7, the anti-load side bracket 15 can be attached to and detached from the frame 13, and is fixed to the frame 13 by fastening a plurality of outer edge portions (seven locations in this example) with bolts 37. . A shield plate 38 made of, for example, a magnetic material is provided at the center position of the anti-load side bracket 15 to protect the resolver 16 provided therein from noise.

  The terminal block 123 connects the power cable 122 through the cable port 138 and the winding cable connecting portion 124 of the stator 12 by fastening bolts and nuts. The power cable 122 is a cable through which a driving three-phase alternating current supplied from an external inverter (not shown) flows, and corresponds to each of the U, V, and W phases of the three-phase alternating current. The terminal block 123 has three attachment pieces 123a at both the left and right sides and the lower center position, and is formed in a symmetrical shape. The terminal block 123 is attached to the anti-load side bracket 15 by fastening two of the three attachment pieces 123 a with bolts 39.

  In FIG. 7, the power cable 122 is passed through a cable port 138 formed on the left side surface of the frame 13, and the terminal block 123 is cut as described above by fastening the left and lower attachment pieces 123 a with bolts 39. It is installed on the left side with respect to the plane P. On the other hand, for example, when the cable port 138 is formed on the right side surface of the frame 13, the terminal block 123 is fixed to the cut surface P by fastening the right and lower attachment pieces 123 a of the terminal block 123 with the bolts 39. Can be installed on the right side. In this case, a bolt hole to which the bolt 39 is fastened is denoted by reference numeral 40. With such a configuration, the anti-load side bracket 15 functions as a fixing member that can fix the terminal block 123 at two substantially symmetrical positions with respect to the cut surface P.

  The bus bar 203 is disposed above the anti-load side bracket 15. In the example shown in FIG. 7, among the six connection parts 121 connected to the bus bar 203, three on the right side (left side in the figure) are the high-speed cable connection parts 121 a and 3 on the left side (right side in the figure). One is a connection portion 121b for a low-speed cable. Each connection part 121 is connected to the bus bar 203 by fastening bolts and nuts. The anti-load side bracket 15 has a plurality of openings 151 (four in this example) for inserting the winding cables, and the winding cables corresponding to the openings 151 are inserted. These openings 151 are also formed in a substantially symmetrical shape with respect to the cutting plane P. Thereby, even when the left and right arrangement of the terminal block 123 is changed, the winding cable of the connecting portion 124 is inserted into the opening 151 on the opposite side in the left and right direction without changing the anti-load side bracket 15. It is possible.

  With the configuration of the accommodating portion as described above, the winding switching circuit 20 accommodated in the first accommodating portion 131 can be attached or maintained only by accessing from above the frame 13. Further, with respect to the terminal block 123 and the like accommodated in the second accommodating portion 132, it is possible to perform attachment work and wiring work only by accessing from the opposite side of the frame 13. Further, assembling work of the rotating electrical machine 1 including fixing of the stator 12 to the frame 13 and insertion of the shaft 10 can be performed only by accessing from the anti-load side of the frame 13 with the anti-load side bracket 15 removed. It can be carried out.

<Frame flow path structure>
Next, the structure of the flow path 135 of the frame 13 will be described. As described above, the flow path 135 is integrally formed inside the frame 13 by casting using a core (not shown). The flow of the coolant through the flow path 135 is indicated by thick arrows in FIGS. 8A to 8D.

  As shown in FIG. 8A, the coolant that has flowed from the inflow port 136 first flows into the first flow path portion 135 a of the flow path 135. The first flow path part 135 a is formed in the lower part of the first housing part 131, and the winding switching circuit 20 in which the inner circumference of the flow path faces the stator 12 and the outer circumference is housed in the first housing part 131. Opposite to. The first flow path part 135a is formed in a substantially U shape, and the IGBT 201 and the two sets of diodes 202 are arranged along the U-shaped first flow path part 135a in the first housing part 131.

  The coolant that has flowed through the first flow path portion 135a flows into the second flow path portion 135b via the communication portion 135c (see FIG. 8B and FIG. 11 described later). As shown in FIGS. 8B to 8D, the second flow path portion 135b is formed to meander in a zigzag manner along the circumferential direction of the frame 13 so as to surround the stator 12 in the circumferential direction. The channel width and depth of the second channel part 135b are substantially constant, and the channel area is formed to be substantially constant. Further, the inner periphery faces the stator 12. As shown in FIG. 8D, the most downstream side of the second flow path portion 135b communicates with the outflow port 137, and the coolant that has flowed through the second flow path portion 135b flows out from the outflow port 137. In this way, the cooling liquid cools the winding switching circuit 20 and the stator 12 while flowing through the first flow path portion 135a, and cools the stator 12 while flowing through the second flow path portion 135b.

  The first flow path part 135a and the second flow path part 135b constituting the flow path 135 are formed so that the number of turns is relatively small while the flow path width is relatively large. In this embodiment, as shown in FIGS. 8A to 8D, when the frame 13 is viewed from the upper direction, the right direction, the lower direction, and the left direction, the number of turns of the flow path 135 is once in each direction. It is formed to become. Thereby, channel resistance can be reduced and cooling efficiency can be kept favorable.

  For example, a self-disintegrating core (not shown) formed by joining sand using a predetermined bonding agent is used to form the flow path 135. This core is installed in a mold when the frame 13 is cast, and self-collapses when the temperature becomes high due to injection of molten metal. The core support portion is formed along the flow path 135 as an inlet 136, an outlet 137, portions 136a and 137a having shapes corresponding to these, and a plurality of outlets 1361, and collapses into a sand shape. The core is discharged from these openings.

  In order to form the above-described coolant flow, as shown in FIG. 8D, the first flow path portion 135a and the second flow are formed on the left side surface of the frame 13 where the inflow port 136 and the outflow port 137 are formed. The communication part 135c is not formed between the path part 135b and it is necessary to make it non-communication. That is, the left and right arrangement of the communication portion 135c is determined depending on whether the inflow port 136 and the outflow port 137 are formed on the left or right side of the frame 13. Therefore, in this embodiment, two types of cores corresponding to the arrangement of the inlet 136 and the outlet 137 are prepared, and the core is changed according to the arrangement without changing the mold. An optimum flow path 135 for the determined arrangement can be formed.

  Next, the detail of the shape of the 1st flow path part 135a is demonstrated using FIGS. 9-11. As shown in FIGS. 10 and 11, the first flow path portion 135 a is formed so that the outer periphery 1351 (outer side) is a flat surface facing the winding switching circuit 20, and the inner periphery 1352 (inner side) is It is formed in a cylindrical shape, and at least a part of the inner periphery 1352 faces the stator 12. The planar outer perimeter 1351 and the cylindrical inner perimeter 1352 are closer to the cutting plane P described above, and are closest to each other in the vicinity of the cutting plane P. Therefore, the first flow path portion 135a is the shallowest in the vicinity of the cut surface P, and has a shape in which the depth of the flow path increases as it approaches the left and right end portions of the frame 13. Note that the inner periphery 1352 of the first flow path portion 135a is not necessarily cylindrical, and may be a flat surface that is gently inclined downward from the cut surface P toward the left and right sides, for example.

  As shown in FIG. 9, the first flow path portion 135a is formed in a substantially U shape that is bent in the vicinity of the cut surface P, which is a proximity portion where the outer periphery 1351 and the inner periphery 1352 are closest to each other. And the flow path width W (flow path width seen from above) of the first flow path part 135a increases as it approaches the cut surface P, and is the maximum Wmax (> W) at the bent portion in the vicinity of the cut surface P. It is formed to become. This is because the first flow path part 135a is narrowed in the depth direction in the vicinity of the cut surface P due to its structure, and therefore the flow path width W is increased as it approaches the cut surface P. This is because by setting the maximum in the vicinity, the flow path area of the first flow path part 135a can be made substantially constant, and an increase in flow path resistance can be suppressed.

  The communication part 135 c communicates the first flow path part 135 a and the second flow path part 135 b behind the frame 13. As shown in FIG. 11, the communication portion 135 c is formed in a cylindrical shape whose inner periphery 1353 is substantially concentric with the outer periphery of the stator 12, and the bottom portion is inclined closer to the right end portion of the frame 13, The depth of the will increase. As a result, the flow from the first flow path part 135a to the second flow path part 135b can be made smooth, and the cooling efficiency can be improved.

<Mounting flange structure>
Next, the structure of the mounting flange 14 will be described. The attachment flange 14 is a member for attaching the rotating electrical machine 1 to another device (not shown). As shown in FIG. 12, the mounting flange 14 is configured to be detachable from the frame 13. The mounting flange 14 has a substantially annular shape in which a round hole 141 is formed at the center position, and also has a substantially trumpet shape that expands toward the front (the other device side) as shown in FIG. . Insertion holes 142 are provided at a plurality of locations (eight locations in this example) on the inner peripheral portion of the mounting flange 14, and the bolts 41 inserted through these are fastened to the bolt holes 1301 of the frame 13. The flange 14 is fixed to the frame 13. In FIG. 12, only two bolts 41 are shown for the purpose of preventing complications.

  The outer surface of the load side bracket 130 described above constitutes a flange attachment surface 1300 to which the attachment flange 14 is attached. The flange mounting surface 1300 is a columnar projecting surface provided at the front side end of the frame 13, and the bolt hole 1301 for fixing the mounting flange 14 is expanded in a circular shape outward in the radial direction. The outlet 1302 is provided. In addition, the flange mounting surface 1300 is formed with a spigot joint 1303 that can be fitted into the round hole 141 of the mounting flange 14. The spigot joint portion 1303 is a circular protrusion centered on the rotation axis O of the shaft 10, and as shown in FIGS. 2 and 3, the spigot joint portion 1303 is connected to the mounting flange 14 by fitting with the round hole 141. . Accordingly, the mounting flange 14 can be easily positioned so as to be concentric with the shaft 10 with respect to the frame 13.

  In addition, pin holes 1304 and 143 into which the positioning pins 43 can be inserted are provided at corresponding positions of the flange mounting surface 1300 and the mounting flange 14, respectively. The positioning pin 43 positions the mounting flange 14 in the rotation direction. In the example shown in FIG. 12, only one positioning pin 43 is used, but pin holes 1304 and 143 may be provided at a plurality of locations and positioned by a plurality of positioning pins 43.

  Further, mounting holes 144 (mounting portions) are provided at a plurality of locations (eight positions in this example) on the outer peripheral portion of the mounting flange 14. In these mounting holes 144, mounting bolts (not shown) for mounting the mounting flange 14 to other devices are inserted from the rear toward the front and fastened to the bolt holes of the other devices. Thereby, the rotary electric machine 1 is fixed to another apparatus. As shown in FIG. 6, at least a part of these mounting holes 144 (in this example, six mounting holes 144 excluding the upper two mounting holes 144) are located on the rear side (anti-load side) of the frame 13. ) And is arranged outside the frame 13. Thereby, since the operation | work (bolt fastening operation | work etc.) which attaches the rotary electric machine 1 to another apparatus can be easily performed over a flame | frame, the workability | operativity of attachment can be improved.

  In addition, as shown in FIG. 12 etc., the recessed part 1305 is formed in the front upper part of the flame | frame 13. As shown in FIG. With this recess 1305, it is possible to secure a work space for bolting work or the like for the two mounting holes 144 above the mounting flange 14.

<Effect of embodiment>
As described above, according to the rotating electrical machine 1 according to the present embodiment, the flow path 135 includes the first flow path portion 135a and the second flow path portion 135b. The first flow path portion 135a is formed so that its inner circumference faces the stator 12 and its outer circumference faces the winding switching circuit 20 housed in the first housing section 131. Both winding switching circuits 20 can be cooled. Moreover, since the 2nd flow-path part 135b is formed so that the stator 12 may be enclosed in the circumferential direction, the stator 12 can be cooled efficiently. As described above, since both the stator 12 and the winding switching circuit 20 can be cooled by the first flow path portion 135a, as compared with a configuration in which separate flow paths are provided for the winding switching circuit 20 and the stator 12 respectively. The number of pipes and hoses for connecting the flow paths can be reduced, and the structure can be simplified. Moreover, since the flow path 135 can be shortened, the pressure loss in the flow path 135 can be reduced. Furthermore, since the first accommodating portion 131 is formed in the frame 13 and the winding switching circuit 20 is accommodated therein, the frame for the winding switching circuit 20 and the frame 13 are separate from each other. The structure can be simplified. In addition, since the flow path 135 is disposed between the winding switching circuit 20 and the stator 12, the influence of heat from the stator 12 can be suppressed on the winding switching circuit 20.

  In the present embodiment, the following effects are obtained. That is, as shown in FIGS. 10 and 11, when a cylindrical stator 12 is provided on the inner periphery of the frame 13 and a plate-like winding switching circuit 20 is provided on the outer periphery, the stator 12 and the winding switching in the frame 13 are switched. The space between the circuit 20 is thin at the central portion and thicker toward the end. In the present embodiment, at least a part of the inner periphery of the first flow path portion 135a is formed in a cylindrical shape facing the stator 12, and the outer periphery is formed in a planar shape facing the winding switching circuit 20, so that the inside of the frame 13 The above-mentioned space can be effectively used as much as possible as a flow path. As a result, both the stator 12 and the winding switching circuit 20 can be efficiently cooled.

  Further, as a result of making the inner periphery of the first flow path part 135a cylindrical, the depth of the first flow path part 135a is greater at the end than at the central part in the left-right direction of the frame 13. . As a result, the inflow of the cooling liquid from the inlet 136 at the left end to the first flow path part 135a and the flow of the cooling liquid from the first flow path part 135a to the second flow path part 135b at the right end can be made smooth. There is also an effect that the cooling efficiency can be improved.

  In the present embodiment, the following effects are obtained. That is, when the inner periphery of the first flow path portion 135a is formed in a cylindrical shape and the outer periphery is formed in a flat shape, a proximity portion where the outer periphery and the inner periphery are closest to each other is formed in the middle of the flow path. Since the flow path is narrowed in the depth direction at the adjacent part, the flow path resistance increases as the number of the close part increases. Therefore, in the present embodiment, the first flow path portion 135a is formed in a substantially U shape that is bent in the vicinity of the adjacent portion (the cut surface P in the above embodiment) where the outer periphery and the inner periphery are closest to each other. The position of the adjacent part in the road part 135a can be made into one minimum. Thereby, increase in flow path resistance can be suppressed and it can prevent that cooling efficiency falls.

  In the present embodiment, the following effects are obtained. That is, since the flow path is narrowed in the depth direction in the vicinity of the adjacent portion (the cut surface P in the above embodiment) where the outer periphery and the inner periphery of the first flow path portion 135a are closest to each other, When the width W is constant, the flow channel area decreases in the adjacent portion, and the flow channel resistance increases. Therefore, in the present embodiment, as shown in FIG. 9, the flow path width W is formed to be the maximum Wmax (> W) in the bent portion of the first flow path portion 135a, that is, in the vicinity of the cut surface P. The area of the flow path in the vicinity of the cut surface P can be made equal to or greater than that of other portions. Thereby, the increase in the channel resistance of the first channel part 135a can be suppressed, and the cooling efficiency can be prevented from decreasing.

  In the present embodiment, the bus bar 203 connects the diode 202 and the connection portion 121 of the winding cable of the stator 12. By using such a bus bar 203, terminal blocks and the like can be reduced. Further, since the bus bar 203 can be brought into close contact with the frame 13 through the insulating portion of the bus bar 203, the bus bar 203 can be easily cooled.

  In the present embodiment, in particular, the first housing part 131 is disposed on the upper surface of the rotating electrical machine 1, and the second housing part 132 is disposed on the anti-load side (anti-attachment side) of the rotating electrical machine 1. And the 1st accommodating part cover 17 and the 2nd accommodating part cover 18 are each provided so that attachment or detachment is possible. For this reason, the wiring switching circuit 20, the connection part 121, and the power cable 122 can be easily wired and maintained. In addition, access from the second housing cover 18 to the inside of the rotating electrical machine 1 is also possible.

  In the present embodiment, in particular, the frame 13 is formed to be substantially symmetrical. Accordingly, it is possible to freely determine whether the inlet 136, the outlet 137, the cable port 138, and the circuit port 139 are arranged on the left side or the right side of the rotating electrical machine 1, and the frame 13 is made common. can do.

  In the present embodiment, in particular, the mounting flange 14 is detachably provided on the load side of the frame 13. Thereby, the attachment flange 14 can be changed according to the shape of other apparatuses, such as a vehicle which is an attachment destination, and the flame | frame 13 can be made shared.

<Modifications>
The embodiment has been described above. However, a so-called person skilled in the art can appropriately modify the above embodiment without departing from the spirit of the present embodiment, and can appropriately combine the above embodiment and the method according to the modification. Is possible. That is, it is needless to say that even a technique with such a change is included in the technical scope of the present embodiment.

  For example, in the above description, the winding switching circuit 20 is accommodated in the first accommodating portion 131, but other circuits such as an inverter may be accommodated.

  Further, for example, in the above description, the coolant flows from the first flow path portion 135a to the second flow path portion 135b, but conversely, it may flow from the second flow path portion 135b to the first flow path portion 135a. Good. In this case, the coolant may be introduced from the outlet 137 and out of the inlet 136.

  In the above description, the application of the rotating electrical machine 1 is not particularly described. However, for example, as illustrated in FIG. 13, the rotating electrical machine 1 may be used as a drive source or a power generation source of the vehicle C. The vehicle C is, for example, an electric vehicle or a hybrid vehicle. Conventionally, such a rotating electrical machine for a vehicle has different specifications required depending on the vehicle on which it is mounted, and thus a frame is manufactured each time. However, according to the above-described embodiment, it is possible to arrange openings for passing cables or the like on either the left or right side of the frame 13 according to the specifications of the vehicle, and the mounting flange 14 according to the specifications of the vehicle. Thus, the rotating electrical machine 1 can be attached to the vehicle without changing the frame 13 simply by exchanging them. That is, the vehicular rotating electrical machine 1 can be made common and used as a general-purpose product. The vehicle in which the rotating electrical machine 1 is used may be a construction machine or the like. In addition to the vehicle, the present invention can be applied to, for example, a ship, an aircraft, and the like.

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 10 Shaft 11 Rotor 12 Stator 13 Frame (frame for rotating electrical machines)
14 Mounting flange 15 Anti-load side bracket (fixing member)
16 Resolver (electric part)
17 First housing cover (cover)
18 Second housing cover (cover)
20 Coil switching circuit 30 Bearing 31 Bearing 43 Positioning pin 121 Connection part (electric part)
122 Power cable (electrical parts)
123 Terminal block (electrical parts)
130 Load side bracket 131 1st accommodating part (circuit accommodating part)
132 2nd accommodating part (winding accommodating part)
134 opening 135 flow path 135a first flow path portion 135b second flow path portion 136 inflow port (opening)
136a Part having a shape corresponding to an inflow port (part having a shape corresponding to an opening)
137 Outlet (opening)
137a A portion having a shape corresponding to an outlet (a portion having a shape corresponding to an opening)
138 Cable mouth (opening)
138a Part having a shape corresponding to a cable port (part having a shape corresponding to an opening)
139 Circuit port (opening)
139a A portion having a shape corresponding to a circuit opening (a portion having a shape corresponding to an opening)
141 Round hole 143 Pin hole 144 Mounting hole (Mounting part)
201 IGBT (circuit components, electrical components)
202 Diode (circuit parts, electrical parts)
203 Busba (circuit components, electrical components)
204 Board (circuit parts, electrical parts)
205 elements (circuit parts, electrical parts)
1300 Flange mounting surface 1301 Bolt hole 1302 Swelling part 1303 Spigot joint part 1304 Pin hole 1351 Outer circumference (outside)
1352 Inner circumference (inside)
C Vehicle O Rotating shaft P Cut surface

Claims (11)

A frame in which a flow path through which a coolant flows is formed;
A stator provided on the inner periphery of the frame;
A plurality of circuit components provided on the outer periphery of the frame,
The flow path is
A first flow path portion having an inner side facing the stator and an outer side facing the plurality of circuit components;
Have a, a second flow passage portion formed so as to surround the stator in a circumferential direction,
The plurality of circuit components are:
The rotating electrical machine, wherein the rotating electrical machine is arranged on an outer periphery of the frame so as to follow a bent shape of the first flow path portion . The first flow path part is
2. The rotating electrical machine according to claim 1, wherein an inner side is formed in a cylindrical shape facing the stator and an outer side is formed in a planar shape facing the circuit component. The first flow path part is
3. The rotating electrical machine according to claim 2, wherein the rotating electric machine is formed in a substantially U-shape that is bent in the vicinity of a proximity portion where the outer side and the inner side are closest to each other. The first flow path part is
The rotating electrical machine according to claim 3, wherein the flow path width as viewed from the circuit component side is formed to be maximum at the bent portion. A frame in which a flow path through which a coolant flows is formed;
A stator provided on the inner periphery of the frame so as to be cooled by the flow path;
A plurality of circuit components provided on the outer periphery of the frame so as to be cooled by the flow path ,
The plurality of circuit components are:
The rotating electrical machine, wherein the rotating electrical machine is arranged on an outer periphery of the frame so as to follow a bent shape of the flow path . A circuit accommodating portion for accommodating the plurality of circuit components is formed on the outer periphery of the frame,
The rotating electrical machine according to claim 5, wherein the circuit housing portion is covered by a cover provided on the frame. On the outer periphery of the frame, a winding accommodating portion for accommodating a connecting portion of the stator winding is formed,
The rotating electrical machine according to claim 5, wherein the winding housing portion is covered with a cover provided on the frame. A circuit accommodating portion that accommodates the plurality of circuit components and a winding accommodating portion that accommodates the winding of the stator are formed on the outer periphery of the frame,
The rotating electrical machine according to claim 5, wherein a bus bar for connecting the circuit component and the connection portion of the winding is provided on an outer periphery of the frame. The rotating electrical machine according to any one of claims 5 to 8, wherein the frame has a shape that is substantially symmetric with respect to a surface that bisects the rotating electrical machine in the vertical direction. The rotating electrical machine according to any one of claims 5 to 9, further comprising an attachment flange provided on the frame for attaching the rotating electrical machine to another device. A vehicle comprising the rotating electrical machine according to any one of claims 1 to 10.

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