Rotary electric machine connection change device, rotary electric machine, and rotary electric machine manufacturing method

Abstract

To obtain a rotary electric machine connection change device 9 in which erroneous electric connection between a wiring member and a winding end when a connection state of a winding is changed can be restrained, a rotary electric machine, and a manufacturing method therefor.SOLUTION: A rotary electric machine connection change device 9 includes a plate part 94, a slide part 92, a first wiring member, and a second wiring member. The slide part 92 is disposed in a hole 95 of the plate part 94, slides between a first position of the hole 95 and a second position of the hole 95 different from the first position, and is electrically connected to an end of a winding 8. The first wiring member is electrically connected to the slide part 92 that is disposed in the first position. The second wiring member is electrically connected to the slide part 92 that is disposed in the second position. The first wiring member and the second wiring member are wired in such a way that the connection state of the winding when the first wiring member is electrically connected to the slide part 92 is different from that when the second wiring member is electrically connected to the slide part 92.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a connection switching device for a rotating electric machine, a rotating electric machine, and a method for manufacturing a rotating electric machine. [Background technology]

[0002] A conventional connection switching device for a rotating electric machine includes a connection plate having a first wiring member provided on one surface of the plate and a second wiring member provided on the other surface of the plate. The first wiring member and the second wiring member are wired so that when connected to the terminals of the windings, the connection states of the windings differ from each other. When switching the connection state of the windings while the terminals are connected to the first wiring member, the positions of the one surface and the other surface of the connection plate are reversed, and the second wiring member is connected to the terminals (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7364015 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional connection switching device for a rotating electric machine described above, when the connection plate is flipped over to switch the winding connection state, there is a risk that the installation direction may be incorrect, resulting in an incorrect connection between the wiring member and the winding terminal.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a connection switching device for a rotating electric machine, a rotating electric machine, and a manufacturing method thereof that can prevent electrical misconnection between wiring members and the ends of windings when switching the winding connection state. [Means for solving the problem]

[0006] The connection switching device for a rotating electric machine according to the present disclosure is a connection switching device for a rotating electric machine that switches the connection state of the windings of the stator of the rotating electric machine, and includes: a plate portion having a hole formed therein and having insulating properties; a sliding portion that is disposed in the hole and slides between a first position of the hole and a second position of the hole different from the first position and is electrically connected to an end of the winding; a first wiring member that is disposed in the plate portion and electrically connected to the sliding portion when the sliding portion is disposed in the first position; and a second wiring member that is disposed in the plate portion and electrically connected to the sliding portion when the sliding portion is disposed in the second position, and the first wiring member and the second wiring member are wired so that the connection state of the windings when the first wiring member is electrically connected to the sliding portion differs from the connection state of the windings when the second wiring member is electrically connected to the sliding portion.

[0007] The rotating electric machine according to the present disclosure comprises a stator having a winding, a plate portion having a hole formed therein and having insulating properties, a sliding portion disposed in the hole and sliding between a first position of the hole and a second position of the hole different from the first position and electrically connected to an end of the winding, a first wiring member disposed on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed in the first position, and a second wiring member disposed on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed in the second position, and the first wiring member and the second wiring member are wired so that the connection state of the winding when the first wiring member is electrically connected to the sliding portion differs from the connection state of the winding when the second wiring member is electrically connected to the sliding portion.

[0008] The method for manufacturing a rotating electric machine according to the present disclosure includes a first step of electrically connecting the end of the stator winding and a sliding part arranged in a hole in a plate part, and a second step of sliding the sliding part relative to the plate part so that either a first wiring member provided on the plate part or a second wiring member provided on the plate part such that the connection state of the winding when electrically connected to the sliding part is different from the connection state of the winding when the first wiring member is electrically connected to the sliding part is electrically connected to the sliding part. [Effects of the Invention]

[0009] The connection switching device for a rotating electric machine, the rotating electric machine, and the manufacturing method thereof according to the present disclosure can prevent erroneous electrical connection between the wiring member and the end of the winding when switching the connection state of the winding. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view of a rotating electric machine according to a first embodiment. [Figure 2] 2 is a cross-sectional view taken along line AA' of the rotating electric machine according to the first embodiment. FIG. [Figure 3] FIG. 2 is a perspective view of a fixed plate portion and a sliding portion according to the first embodiment. [Figure 4] 1 is a side view of a connection switching device according to a first embodiment. [Figure 5] 1 is a perspective view of a connection switching device according to a first embodiment. [Figure 6] FIG. 2 is a perspective view of a plate portion according to the first embodiment. [Figure 7] 1 is a cross-sectional view of a connection switching device according to a first embodiment. [Figure 8] 10 is a cross-sectional view taken along the line BB' of the connection switching device in the first embodiment, in a state where the sliding portion is placed in the first position of the hole. FIG. [Figure 9] FIG. 2 is a circuit diagram when windings are connected in a 1Y configuration in the first embodiment. [Figure 10] 10 is a cross-sectional view taken along the line BB' of the connection switching device in the first embodiment, in a state where the sliding portion is placed in a second position of the hole. FIG. [Figure 11] FIG. 2 is a circuit diagram when windings are connected in a 2Y configuration in the first embodiment. [Figure 12] 10 is a plan view showing a modified example of the wire connection switching device in the first embodiment in a state where the sliding portion is placed in a first position of the hole. FIG. [Figure 13] 10 is a plan view showing a modified example of the wire connection switching device in the first embodiment in a state where the sliding portion is placed in the second position of the hole. FIG. [Figure 14] FIG. 10 is a perspective view of a connection switching device according to a second embodiment. [Figure 15] 10 is a cross-sectional view of the wire connection switching device in the second embodiment when the sliding portion is placed in the first position of the hole. FIG. [Figure 16] 10 is a cross-sectional view of the wire connection switching device in the second embodiment when the sliding portion is placed in the second position of the hole. FIG. [Figure 17] FIG. 11 is a perspective view of a connection switching device according to a third embodiment. [Figure 18] 11 is a cross-sectional view of the wire connection switching device in the third embodiment, in a state where the sliding portion is placed in a first position of the hole. FIG. [Figure 19] FIG. 11 is a circuit diagram when windings are delta-connected in the third embodiment. [Figure 20] 11 is a cross-sectional view of the wire connection switching device in the third embodiment, in a state where the sliding portion is placed in the second position of the hole. FIG. [Figure 21] FIG. 11 is a circuit diagram when windings are connected in a 1Y configuration in the third embodiment. [Figure 22] FIG. 10 is a perspective view of a connection switching device according to a fourth embodiment. [Figure 23] 10 is a cross-sectional view of the wire connection switching device in a state where the sliding portion is placed in a first position of the hole in the fourth embodiment. FIG. [Figure 24] 10 is a cross-sectional view of the wire connection switching device in the fourth embodiment, in a state where the sliding portion is placed in the second position of the hole. FIG. [Figure 25] FIG. 13 is a perspective view of a connection switching device according to a fifth embodiment. [Figure 26] FIG. 13 is a cross-sectional view of the wire connection switching device in the fifth embodiment, in a state where the sliding portion is placed in the first position of the hole. [Figure 27] FIG. 13 is a circuit diagram when windings are connected in a 2Y configuration in the fifth embodiment. [Figure 28] FIG. 13 is a cross-sectional view of the wire connection switching device in the fifth embodiment, in a state where the sliding portion is placed in the second position of the hole. [Figure 29] FIG. 13 is a circuit diagram when windings are delta-connected in the fifth embodiment. [Figure 30] FIG. 13 is a perspective view of a connection switching device according to a sixth embodiment. [Figure 31] FIG. 20 is a cross-sectional view of the wire connection switching device in the sixth embodiment, in a state where the sliding portion is placed in the first position of the hole. [Figure 32] FIG. 20 is a cross-sectional view of the wire connection switching device in the sixth embodiment, in a state where the sliding portion is placed in the second position of the hole. DETAILED DESCRIPTION OF THE INVENTION

[0011] Embodiment 1 The following will describe in detail the connection switching device 9 for the rotating electric machine 1, the rotating electric machine 1, and a method for manufacturing the rotating electric machine 1 according to the first embodiment. Note that the same reference numerals in the various drawings represent the same or equivalent components.

[0012] As shown in FIG. 1, the rotating electric machine 1 includes a housing 2, a rotating shaft 3, a pair of bearings 4, a rotor 5, a stator 6, and a connection switching device 9 (not shown in FIG. 1). The rotating shaft 3 is rotatably supported by the housing 2 via the pair of bearings 4. The rotor 5 and the stator 6 are provided inside the housing 2. The rotor 5 is fixed to the rotating shaft 3. The rotor 5 has a cylindrical rotor core 5a, which is a magnetic body, and a permanent magnet 5b. The permanent magnet 5b is arranged around the rotor core 5a. The stator 6 is arranged around the rotor 5.

[0013] As shown in Fig. 2, the stator 6 has an annular stator core 7 and windings 8. A plurality of teeth 7a extending toward the rotary shaft 3 are provided on the inner periphery of the stator core 7. The teeth 7a are wound with windings 8. The windings 8 may be concentrated or distributed.

[0014] The winding 8 includes a U-phase winding 81, a V-phase winding 82, and a W-phase winding 83 that are arranged along the circular ring of the stator core 7. The U-phase winding 81 includes a first U-phase winding 81a and a second U-phase winding 81b. The V-phase winding 82 includes a first V-phase winding 82a and a second V-phase winding 82b. The W-phase winding 83 includes a first W-phase winding 83a and a second W-phase winding 83b.

[0015] Ends of the winding 8 are electrically connected to terminals. Specifically, one end of the first U-phase winding 81a is electrically connected to terminal U1 via a lead wire. The other end of the first U-phase winding 81a is electrically connected to terminal U2 via a lead wire. One end of the second U-phase winding 81b is electrically connected to terminal U3 via a lead wire. The other end of the second U-phase winding 81b is electrically connected to terminal N via a lead wire. One end of the first V-phase winding 82a is electrically connected to terminal V1 via a lead wire. The other end of the first V-phase winding 82a is electrically connected to terminal V2 via a lead wire. One end of the second V-phase winding 82b is electrically connected to terminal V3 via a lead wire. The other end of the second V-phase winding 82b is electrically connected to terminal N via a lead wire. One end of the first W-phase winding 83a is electrically connected to terminal W1 via a lead wire. The other end of the first W-phase winding 83a is electrically connected to terminal W2 via a lead wire. One end of the second W-phase winding 83b is electrically connected to terminal W3 via a lead wire. The other end of the second W-phase winding 83b is electrically connected to terminal N via a lead wire. Hereinafter, terminals U1, U2, U3, V1, V2, V3, W1, W2, W3, and N will be referred to as terminals unless they are to be distinguished from one another.

[0016] The connection switching device 9 is a device that switches the connection state of the windings 8 of the stator 6 of the rotating electric machine 1. The connection switching device 9 includes a fixed plate portion 91, a sliding portion 92, a nut 93 (first fixing member), a plate portion 94, a nut 96 (second fixing member), a first wiring member 97, a second wiring member 98, a support portion 99, and a connection display portion 90.

[0017] As shown in FIG. 3, the fixed plate portion 91 is a plate made of, for example, an insulator and has insulating properties. The fixed plate portion 91 corresponds to the second plate portion of the present disclosure. A plurality of sliding portions 92a-j are attached to the fixed plate portion 91, extending in a direction perpendicular to the plane of the fixed plate portion 91. In the following description, unless the sliding portions 92a-j are to be distinguished, they will also be referred to as sliding portions 92. The direction in which the sliding portions 92 extend will also be referred to as the vertical direction. The direction perpendicular to the vertical direction will also be referred to as the planar direction.

[0018] The sliding portions 92 are, for example, bolts and are electrically conductive. As shown in Figures 3 and 4, the sliding portions 92 pass through holes (not shown) formed in the fixed plate portion 91 and are fixed to the fixed plate portion 91. Terminals are connected to the lower portions of the sliding portions 92, and the sliding portions 92 are electrically connected to the ends of the windings 8 via the lead wires and the terminals.

[0019] Specifically, the sliding portion 92a has a terminal U1 connected to its lower portion and is electrically connected to one end of the first U-phase winding 81a via a lead wire and the terminal U1. The sliding portion 92b has a terminal V1 connected to its lower portion and is electrically connected to one end of the first V-phase winding 82a via a lead wire and the terminal V1. The sliding portion 92c has a terminal W1 connected to its lower portion and is electrically connected to one end of the first W-phase winding 83a via a lead wire and the terminal W1. The sliding portion 92d has a terminal U3 connected to its lower portion and is electrically connected to one end of the second U-phase winding 81b via a lead wire and the terminal U3. The sliding portion 92e has a terminal U2 connected to its lower portion and is electrically connected to the other end of the first U-phase winding 81a via a lead wire and the terminal U2. The sliding portion 92f has a terminal V3 connected to its lower portion and is electrically connected to one end of the second V-phase winding 82b via a lead wire and the terminal V3. The sliding portion 92g has a terminal V2 connected to its lower portion and is electrically connected to the other end of the first V-phase winding 82a via a lead wire and the terminal V2. The sliding portion 92h has a terminal W3 connected to its lower portion and is electrically connected to one end of the second W-phase winding 83b via a lead wire and the terminal W3. The sliding portion 92i has a terminal W2 connected to its lower portion and is electrically connected to the other end of the first W-phase winding 83a via a lead wire and the terminal W2. The sliding portion 92j has a terminal N connected to its lower portion and is electrically connected to the other end of the second U-phase winding 81b, the other end of the second V-phase winding 82b, and the other end of the second W-phase winding 83b via a lead wire and the terminal N.

[0020] Nuts 93, which are first fixing members, are attached to the lower parts of the sliding parts 92. By tightening the nuts 93, the electrical connection between the sliding parts 92 and the terminals is maintained and the sliding parts 92 are fixed to the fixing plate part 91. Note that the nuts 93 are not shown in FIG. 3.

[0021] 5, the plate portion 94 is a plate made of, for example, an insulator and has insulating properties. The plate portion 94 is disposed opposite the fixed plate portion 91 in the up-down direction. The plate portion 94 corresponds to the first plate portion of the present disclosure.

[0022] The plate portion 94 is formed with holes 95a-j in which the sliding portion 92 is disposed. In the following description, when the holes 95a-j are not to be distinguished from one another, they are also referred to as holes 95. The holes 95 are formed such that a portion of the holes 95 extends in a first direction and another portion of the holes 95 extends in a second direction different from the first direction between a first position of the holes 95 and a second position of the holes 95 different from the first position. The sliding portion 92 slides between the first position of the holes 95 and the second position of the holes 95. The first position of the holes 95 is a position where the sliding portion 92 disposed at that position is electrically connected to a first wiring member 97 (described later). The second position of the holes 95 is a position where the sliding portion 92 disposed at that position is electrically connected to a second wiring member 98 (described later).

[0023] The hole 95 is formed, for example, in a roughly U-shape. In this case, a part of the hole 95 extends in the left-right direction on the plane of FIG. 5, and another part of the hole 95 extends in a planar direction perpendicular to the left-right direction. The roughly U-shape includes shapes such as a C-shape and a U-shape. The roughly U-shape may also be a shape with a corner or a curved shape without a corner.

[0024] A sliding portion 92 is disposed in each hole 95. Specifically, sliding portion 92a is disposed in hole 95a. Sliding portion 92b is disposed in hole 95b. Sliding portion 92c is disposed in hole 95c. Sliding portion 92d is disposed in hole 95d. Sliding portion 92e is disposed in hole 95e. Sliding portion 92f is disposed in hole 95f. Sliding portion 92g is disposed in hole 95g. Sliding portion 92h is disposed in hole 95h. Sliding portion 92i is disposed in hole 95i. Sliding portion 92j is disposed in hole 95j.

[0025] Nuts 96, which are second fixing members, are attached to the upper portions of the sliding portions 92. By tightening the nuts 96, the electrical connection between the sliding portion 92 and the first wiring member 97 or the second wiring member 98 and the electrical connection between the sliding portion 92 and the copper plate 10, which will be described later, are maintained, and the sliding portion 92 is fixed to the plate portion 94.

[0026] The wiring connection indicator 90 is provided on a non-facing surface 94a of the plate portion 94 that does not face the fixed plate portion 91, and indicates the connection state of the winding 8 when the first wiring member 97 or the second wiring member 98 is electrically connected to the sliding portion 92. Examples of the connection state of the winding 8 include a Δ connection (delta connection), a 1Y connection (single star connection), and a 2Y connection (double star connection). In this embodiment, the wiring connection indicator 90 displays "1Y" near the first position of the hole 95, and displays "2Y" near the second position of the hole 95. Note that the wiring connection indicator 90 may also display symbols, circuit diagrams, or the like.

[0027] 6, a first wiring member 97, a second wiring member 98, and a support portion 99 are provided on an opposing surface 94b of the plate portion 94 that faces the fixed plate portion 91. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92.

[0028] The first wiring member 97 is made up of three conductive plates. The first wiring member 97 is attached to the surface of the plate portion 94 with adhesive, screws, or the like. The first wiring member 97 is wired so that the winding 8 forms a 1Y connection when the first wiring member 97 is electrically connected to the sliding portion 92. The first wiring member 97 electrically connects the sliding portion 92d to the sliding portion 92e, electrically connects the sliding portion 92f to the sliding portion 92g, and electrically connects the sliding portion 92h to the sliding portion 92i.

[0029] The second wiring member 98 is made up of four conductive plates. The second wiring member 98 is attached to the surface of the plate portion 94 with adhesive, screws, or the like. The second wiring member 98 is wired so that the winding 8 forms a 2Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92a to the sliding portion 92d, electrically connects the sliding portion 92b to the sliding portion 92f, electrically connects the sliding portion 92c to the sliding portion 92h, and electrically connects the sliding portion 92e to the sliding portion 92g, and the sliding portion 92i to the sliding portion 92j.

[0030] The support portions 99 are four insulating plates. The support portions 99 are attached to the surface of the plate portion 94 with adhesive, screws, or the like. As shown in FIG. 7, the support portions 99 are formed so that the length of the support portions 99 in the up-down direction is equal to the lengths of the first wiring member 97 and the second wiring member 98. Note that FIG. 7 is a cross-sectional view of the connection switching device 9 shown in FIG. 5 taken in the short direction of the plate portion 94, passing through the sliding portion 92j and the terminal N.

[0031] When the sliding portion 92 is disposed in the first position of the hole 95, the support portion 99 comes into contact with the sliding portion 92 to support the plate portion 94. This prevents the plate portion 94 from tilting relative to the fixed plate portion 91, and prevents the sliding portion 92 from separating from the first wiring member 97 and becoming electrically disconnected.

[0032] Next, a method for manufacturing the rotating electrical machine 1 when the windings 8 are connected in a 1Y connection will be described.

[0033] First, as shown in Fig. 3, the end of the winding 8 is electrically connected to the sliding portion 92. Specifically, after inserting the sliding portion 92 into a hole (not shown) in the fixed plate portion 91, a terminal electrically connected to the end of the winding 8 is connected to the lower portion of the sliding portion 92. Then, nuts 93 are attached to the lower portion of each sliding portion 92 and tightened. This fixes each sliding portion 92 to the fixed plate portion 91, and electrically connects the end of the winding 8 to the sliding portion 92. This step corresponds to the first step in this disclosure.

[0034] 5, the plate portion 94 is placed opposite the fixed plate portion 91. At this time, the sliding portion 92 is inserted into the hole 95.

[0035] Next, the sliding portion 92 is slid relative to the plate portion 94 so that the first wiring member 97 is electrically connected to the sliding portion 92. Specifically, while the positions of the fixing plate portion 91, the nut 93, the terminal, and the sliding portion 92 are fixed, the plate portion 94 is slid in a planar direction to position the sliding portion 92 at a first position in the hole 95. As shown in FIG. 8 , the sliding portions 92d, 92e, 92f, 92g, 92h, and 92i contact the first wiring member 97 and are electrically connected to the first wiring member 97. The sliding portions 92a, 92b, 92c, and 92j contact the support portion 99. Therefore, the winding 8 is 1Y-connected as shown in FIG. 9 . Note that sliding the sliding portion 92 relative to the plate portion 94 also includes sliding the sliding portion 92 in a planar direction together with the fixing plate portion 91, the nut 93, and the terminal while the position of the plate portion 94 is fixed. This step corresponds to the second step in the present disclosure. In Fig. 8, the copper plate 10 and the terminals U, V, and W are not shown.

[0036] Next, wiring is performed to supply current to the sliding portions 92a, 92b, and 92c. Specifically, conductive copper plates 10 are connected to the sliding portions 92a, 92b, and 92c, respectively. Terminals U, V, and W, which are connected to power lines that supply three-phase AC current from an external inverter (not shown), are connected to the copper plates 10. Terminal U is electrically connected to the sliding portion 92a, and a U-phase current is supplied thereto. Terminal V is electrically connected to the sliding portion 92b, and a V-phase current is supplied thereto. Terminal W is electrically connected to the sliding portion 92c, and a W-phase current is supplied thereto.

[0037] Finally, the sliding portion 92 is fixed to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. Specifically, nuts 96 are attached to the upper portions of the sliding portion 92 and tightened. This fixes the sliding portion 92 to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. The electrical connections between the sliding portion 92a and terminal U, between the sliding portion 92b and terminal V, and between the sliding portion 92c and terminal W are also maintained.

[0038] A method for switching the windings 8 of a rotating electric machine 1 manufactured by the above-described manufacturing method from a 1Y connection to a 2Y connection will be described. In other words, a method for manufacturing a rotating electric machine 1 having windings 8 connected in 2Y connection from a rotating electric machine 1 having windings 8 connected in 1Y connection will be described.

[0039] First, the nut 96 attached to the sliding portion 92 is loosened. At this time, the nut 96 does not need to be completely removed from the sliding portion 92; it is sufficient to loosen the nut 96 to the extent that the sliding portion 92 can slide relative to the plate portion 94. Because the connection state of the winding 8 can be changed without removing the plate portion 94 from the sliding portion 92, the nut 96 does not need to be completely removed from the sliding portion 92, which makes it possible to prevent the nut 96 from being lost.

[0040] Next, the sliding portion 92 is slid relative to the plate portion 94 so that the second wiring member 98 is electrically connected to the sliding portion 92. Specifically, while the positions of the fixing plate portion 91, the nut 93, the terminal, and the sliding portion 92 are fixed, the plate portion 94 is slid in a planar direction to position the sliding portion 92 in the second position of the hole 95. As shown in FIG. 10, all of the sliding portions 92 come into contact with the second wiring member 98 and are electrically connected to the second wiring member 98. Therefore, the winding 8 is 2Y-connected as shown in FIG. 11. This process also corresponds to the second process in the present disclosure. In FIG. 10, the copper plate 10 and the terminals U, V, and W are not shown.

[0041] Finally, the sliding portion 92 is fixed to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the second wiring member 98. Specifically, nuts 96 are attached to the upper portions of the sliding portion 92 and tightened. This fixes the sliding portion 92 to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. The electrical connections between the sliding portion 92a and terminal U, between the sliding portion 92b and terminal V, and between the sliding portion 92c and terminal W are also maintained.

[0042] Next, a method for manufacturing the rotating electrical machine 1 when the windings 8 are 2Y connected will be described.

[0043] First, the end of the winding 8 and the sliding portion 92 are electrically connected in the same manner as in the first step described above.

[0044] Next, the plate portion 94 is arranged so as to face the fixed plate portion 91 in the vertical direction. At this time, the sliding portion 92 is inserted into the hole 95.

[0045] Next, the sliding portion 92 is slid relative to the plate portion 94 so that the second wiring member 98 is electrically connected to the sliding portion 92. Specifically, while the positions of the fixed plate portion 91, the nut 93, the terminal, and the sliding portion 92 are fixed, the plate portion 94 is slid in a planar direction to position the sliding portion 92 in the second position of the hole 95. As shown in FIG. 10, all of the sliding portions 92 come into contact with the second wiring member 98 and are electrically connected to the second wiring member 98. Therefore, the winding 8 is 2Y-connected as shown in FIG. 11. This step also corresponds to the second step in this disclosure.

[0046] Next, wiring is performed to supply current to the sliding portions 92a, 92b, and 92c in the same manner as described above.

[0047] Finally, the sliding portion 92 is fixed to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the second wiring member 98. Specifically, nuts 96 are attached to the upper portions of the sliding portion 92 and tightened. This fixes the sliding portion 92 to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. The electrical connections between the sliding portion 92a and terminal U, between the sliding portion 92b and terminal V, and between the sliding portion 92c and terminal W are also maintained.

[0048] A method for switching the windings 8 of a rotating electric machine 1 manufactured by the above-described manufacturing method from a 2Y connection to a 1Y connection will be described. In other words, a method for manufacturing a rotating electric machine 1 with 1Y-connected windings 8 from a rotating electric machine 1 with 2Y-connected windings 8 will be described.

[0049] First, the nut 96 attached to the sliding portion 92 is loosened in the same manner as described above.

[0050] Next, the sliding portion 92 is slid relative to the plate portion 94 so that the first wiring member 97 is electrically connected to the sliding portion 92. Specifically, while the positions of the fixing plate portion 91, the nut 93, the terminal, and the sliding portion 92 are fixed, the plate portion 94 is slid in a planar direction to position the sliding portion 92 at a first position in the hole 95. As shown in FIG. 8, the sliding portions 92d, 92e, 92f, 92g, 92h, and 92i contact the first wiring member 97 and are electrically connected to the first wiring member 97. The sliding portions 92a, 92b, 92c, and 92j contact the support portion 99. Therefore, the winding 8 is 1Y-connected as shown in FIG. 9. This process also corresponds to the second process in this disclosure.

[0051] Finally, the sliding portion 92 is fixed to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. Specifically, nuts 96 are attached to the upper portions of the sliding portion 92 and tightened. This fixes the sliding portion 92 to the plate portion 94, maintaining the electrical connection between the sliding portion 92 and the first wiring member 97. The electrical connections between the sliding portion 92a and terminal U, between the sliding portion 92b and terminal V, and between the sliding portion 92c and terminal W are also maintained.

[0052] The rotation speed and torque of the rotary electric machine 1 will be described below for each connection state of the windings 8. When the windings 8 are 1Y-connected, the current flowing through the first U-phase winding 81a is doubled and the voltage applied to the first U-phase winding 81a is halved compared to when the windings 8 are 2Y-connected. The same is true for the second U-phase winding 81b, the first V-phase winding 82a, the second V-phase winding 82b, the first W-phase winding 83a, and the second W-phase winding 83b.

[0053] As the voltage applied to the windings 8 increases, the rotational speed of the rotating electric machine 1 increases. Therefore, if it is desired to increase the rotational speed of the rotating electric machine 1, it is advisable to connect the windings 8 in a 2Y connection. Furthermore, as the current flowing through the windings 8 increases, the torque of the rotating electric machine 1 increases. Therefore, if it is desired to increase the torque of the rotating electric machine 1, it is advisable to connect the windings 8 in a 1Y connection. In this way, the connection state of the windings 8 can be switched depending on the rotational speed or torque that is desired to be output from the rotating electric machine 1.

[0054] For example, if connection switching device 9 of this embodiment is applied to a rotating electric machine for a hoisting machine of an elevator apparatus, in a predetermined test performed when inspecting the elevator apparatus, first wiring member 97 and sliding portion 92 are electrically connected to form a 1Y connection of winding 8. During normal operation of the elevator apparatus, the connection state of winding 8 is switched to electrically connect second wiring member 98 and sliding portion 92 to form a 2Y connection of winding 8. Connection switching device 9 makes it easy to switch winding 8 between a 1Y connection and a 2Y connection.

[0055] The rotating electric machine 1 and connection switching device 9 of the rotating electric machine 1 in the first embodiment include a sliding portion 92 that slides between a first position of the hole 95 and a second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0056] Furthermore, in the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 according to the first embodiment, the first wiring member 97 is wired so that the windings 8 are in a 1Y connection when the first wiring member 97 is electrically connected to the sliding portion 92, and the second wiring member 98 is wired so that the windings 8 are in a 2Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. Therefore, the windings 8 can be easily switched between a 1Y connection and a 2Y connection depending on the rotational speed or torque that is desired to be output from the rotating electric machine 1.

[0057] Furthermore, in the rotating electric machine 1 and the connection switching device 9 for the rotating electric machine 1 according to the first embodiment, the sliding portions 92 are slidable relative to the plate portion 94 and are fixed relative to the fixed plate portion 91. By fixing the sliding portions 92 to the fixed plate portion 91, the movements of the multiple sliding portions 92 can be linked together. Therefore, when sliding the sliding portions 92 relative to the plate portion 94, it is not necessary to slide the sliding portions 92 one by one, improving work efficiency. Furthermore, because the sliding portions 92 move in a linked manner, it is possible to prevent a situation in which some sliding portions 92 are positioned at the first positions of the holes 95 and other sliding portions 92 are positioned at the second positions of the holes 95. Therefore, it is possible to prevent an electrical erroneous connection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0058] Furthermore, in the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 according to the first embodiment, the first wiring member 97 and the second wiring member 98 are provided on the surface of the plate portion 94. Furthermore, when the first wiring member 97 or the second wiring member 98 needs to be replaced due to rust or damage occurring on the surface of the first wiring member 97 or the second wiring member 98, the first wiring member 97 or the second wiring member 98 can be easily replaced.

[0059] Furthermore, in the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 according to the first embodiment, the holes 95 are formed such that a portion of the holes 95 extends in a first direction and another portion of the holes 95 extends in a second direction different from the first direction between the first position of the holes 95 and the second position of the holes 95. For example, the holes 95 are formed in a substantially U-shape. Even if the connection switching device 9 vibrates due to an external influence, such as vibrations from devices installed around the connection switching device 9, and the sliding portion 92 slides from the first position of the holes 95 to the right in the plane of FIG. 8 , the sliding portion 92 does not reach the second position of the holes 95. In other words, even if the sliding portion 92, which is located at the first position of the holes 95, slides due to an external influence, it does not easily reach the second position of the holes 95. This prevents the connection state of the windings 8 from being switched due to external influences.

[0060] Furthermore, the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 in the first embodiment are provided with a connection display unit 90 that displays the connection state of the windings 8 when the first wiring member 97 or the second wiring member 98 is electrically connected to the sliding portion 92. By visually checking the connection display unit 90, an operator can easily determine the connection state of the windings 8.

[0061] Furthermore, in the manufacturing method of the rotating electric machine 1 according to the first embodiment, in the second step, the sliding portion 92 is slid relative to the plate portion 94 so that either the first wiring member 97 provided on the plate portion 94 or the second wiring member 98 provided on the plate portion 94 is electrically connected to the sliding portion 92. Because the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, it is not necessary to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent the first wiring member 97 or the second wiring member 98 from being electrically connected to the end of the winding 8.

[0062] Although an example has been described in which the fixed plate portion 91, the plate portion 94, and the support portion 99 are insulating, portions of their surfaces that come into contact with the terminal, the sliding portion 92, the first wiring member 97, the second wiring member 98, and the copper plate 10 may also be insulating. Also, the fixed plate portion 91, the plate portion 94, and the support portion 99 do not need to be made of an insulator as long as their surfaces are insulating. For example, the surfaces of the fixed plate portion 91, the plate portion 94, and the support portion 99, which are made of a conductor, may be covered with an insulator such as resin.

[0063] As long as the support portion 99 can contact the sliding portion 92 and support the plate portion 94, the length of the support portion 99 in the vertical direction does not have to be equal to the length of the first wiring member 97 and the second wiring member 98.

[0064] The shape of the hole 95 may be approximately L-shaped. The approximately L-shape may be a shape with a corner at one end, or a shape consisting of a curve without any corners. Also, a portion of the hole 95 may be formed in an approximately U-shape or an L-shape.

[0065] The first wiring member 97 and the second wiring member 98 may be disposed inside the plate portion 94. A portion of the first wiring member 97 and the second wiring member 98 may be exposed on the surface of the plate portion 94 so that they can be electrically connected to the sliding portion 92.

[0066] The first wiring member 97 may be provided on the non-opposing surface 94a of the plate portion 94, and the second wiring member 98 may be provided on the opposing surface 94b of the plate portion 94. Alternatively, the first wiring member 97 may be provided on the opposing surface 94b of the plate portion 94, and the second wiring member 98 may be provided on the non-opposing surface 94a of the plate portion 94. By providing the first wiring member 97 and the second wiring member 98 on different surfaces of the plate portion 94 in this manner, the insulation distance between the first wiring member 97 and the second wiring member 98 can be increased.

[0067] When the sliding portion 92 is electrically connected to the first wiring member 97, the winding 8 becomes a 1Y connection, and when the sliding portion 92 is electrically connected to the second wiring member 98, the winding 8 becomes a 2Y connection, so that the arrangement or shape of the sliding portion 92, hole 95, first wiring member 97, and second wiring member 98 is not limited to this embodiment.

[0068] When the sliding portion 92 is caused to slide relative to the plate portion 94 along the hole 95 formed in the plate portion 94, the connection state of the winding 8 can be switched without tilting the sliding portion 92 or the plate portion 94. If the sliding portion 92 can move along the hole 95 in the plate portion 94 without removing the sliding portion 92 from the plate portion 94 and reach the first (2) position of the hole 95 to the second (1) position of the hole 95, the sliding portion 92 and the plate portion 94 do not need to abut on each other along the path along the hole 95, and a gap may exist between them.

[0069] The wiring display unit 90 may be a display attached to the fixed plate unit 91, the plate unit 94, or the like, that displays the connection state of the winding 8. The wiring display unit 90 may be provided on the facing surface 94b of the plate unit 94, or on the first wiring member 97 or the second wiring member 98. The wiring display unit 90 may be provided on the fixed plate unit 91. In this case, a hole 94c is formed in the plate unit 94. As shown in FIG. 12 , when the sliding unit 92 is positioned in the first position of the hole 95, the wiring display unit 90, "1Y," can be seen through the hole 94c from the non-facing surface 94a of the plate unit 94. When the sliding unit 92 is positioned in the second position of the hole 95, the wiring display unit 90, "2Y," can be seen through the hole 94c from the non-facing surface 94a of the plate unit 94.

[0070] To supply current to the sliding portions 92a, 92b, and 92c, the terminals U, V, and W may be directly connected to the sliding portion 92. Alternatively, the terminals U1, V1, and W1 may be electrically connected to a power supply line that supplies three-phase AC current from an external inverter (not shown), and current may be supplied to the sliding portions 92a, 92b, and 92c via the terminals U1, V1, and W1.

[0071] Although an example in which the second step is performed after the first step in the manufacturing method of the rotating electric machine 1 has been described, the first step may be performed after the second step.

[0072] Nuts 93 and 96 do not have to be attached to sliding portion 92, but it is preferable to attach them to sliding portion 92 to maintain the connection between sliding portion 92 and the terminal, the connection between sliding portion 92 and the first wiring member 97 or the second wiring member 98, and the connection between sliding portion 92 and copper plate 10.

[0073] Embodiment 2 The second embodiment differs from the first embodiment in that holes 95 are formed to extend in one direction between the first position of holes 95 and the second position of holes 95. The differences will be described below.

[0074] 14, the plate portion 94 is formed with a hole 95 in which the sliding portion 92 is disposed. The hole 95 is formed to extend in one direction between a first position of the hole 95 and a second position of the hole 95. The hole 95 is, for example, an elongated hole, and extends in the left-right direction on the plane of FIG.

[0075] As shown in FIG. 15, the first wiring member 97 is provided on the opposing surface 94b of the plate portion 94. The first wiring member 97 is made up of three conductive plates. The first wiring member 97 is wired so that the winding 8 forms a 1Y connection when the first wiring member 97 is electrically connected to the sliding portion 92. The first wiring member 97 electrically connects the sliding portion 92d to the sliding portion 92e, electrically connects the sliding portion 92f to the sliding portion 92g, and electrically connects the sliding portion 92h to the sliding portion 92i. Note that the copper plate 10 and the terminals U, V, and W are not shown in FIG. 15.

[0076] When sliding portion 92 is disposed in the first position in hole 95, sliding portions 92d, 92e, 92f, 92g, 92h, and 92i contact first wiring member 97 and are electrically connected to first wiring member 97. Sliding portions 92a, 92b, 92c, and 92j contact support portion 99. Therefore, winding 8 is 1Y-connected.

[0077] As shown in FIG. 16, the second wiring member 98 is provided on the opposing surface 94b of the plate portion 94. The second wiring member 98 is made up of four conductive plates. The second wiring member 98 is wired so that the winding 8 forms a 2Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92a to the sliding portion 92d, electrically connects the sliding portion 92b to the sliding portion 92f, electrically connects the sliding portion 92c to the sliding portion 92h, and electrically connects the sliding portion 92e to the sliding portion 92g, and the sliding portion 92i to the sliding portion 92j. Note that the copper plate 10 and the terminals U, V, and W are not shown in FIG. 16.

[0078] When the sliding portions 92 are disposed in the second positions of the holes 95, all of the sliding portions 92 contact the second wiring members 98 and are electrically connected to the second wiring members 98. Therefore, the winding 8 is 2Y-connected.

[0079] The rotating electric machine 1 and connection switching device 9 for the rotating electric machine 1 according to the second embodiment also include a sliding portion 92 that slides between the first position of the hole 95 and the second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0080] Embodiment 3 The third embodiment differs from the first embodiment in that the winding 8 is delta-connected when the sliding portion 92 is electrically connected to the first wiring member 97, and the winding is 1Y-connected when the sliding portion 92 is electrically connected to the second wiring member 98. The differences are explained below.

[0081] The winding 8 includes a U-phase winding 81, a V-phase winding 82, and a W-phase winding 83 arranged along the circular ring of the stator core 7. The U-phase winding 81 includes a first U-phase winding 81a and a second U-phase winding 81b. The first U-phase winding 81a and the second U-phase winding 81b are connected in series. The V-phase winding 82 includes a first V-phase winding 82a and a second V-phase winding 82b. The first V-phase winding 82a and the second V-phase winding 82b are connected in series. The W-phase winding 83 includes a first W-phase winding 83a and a second W-phase winding 83b. The first W-phase winding 83a and the second W-phase winding 83b are connected in series.

[0082] Ends of the winding 8 are electrically connected to terminals. Specifically, one end of the U-phase winding 81 is electrically connected to terminal U1 via a lead wire. The other end of the U-phase winding 81 is electrically connected to terminal U2 via a lead wire. One end of the V-phase winding 82 is electrically connected to terminal V1 via a lead wire. The other end of the V-phase winding 82 is electrically connected to terminal V2 via a lead wire. One end of the W-phase winding 83 is electrically connected to terminal W1 via a lead wire. The other end of the W-phase winding 83 is electrically connected to terminal W2 via a lead wire. Hereinafter, when terminals U1, U2, V1, V2, W1, and W2 are not to be distinguished from one another, they will be referred to as terminals.

[0083] 17, a plurality of sliding portions 92a-f are attached to the fixed plate portion 91, and extend in a direction perpendicular to the plane of the fixed plate portion 91. In the following description, the sliding portions 92a-f will also be referred to as sliding portions 92 unless they are to be distinguished from one another.

[0084] The sliding portions 92 have terminals connected to their lower portions, and are thereby electrically connected to the ends of the windings 8 via the lead wires and the terminals.

[0085] Specifically, the sliding portion 92a has a terminal U1 connected to its lower portion and is electrically connected to one end of the U-phase winding 81 via a lead wire and the terminal U1. The sliding portion 92b has a terminal V1 connected to its lower portion and is electrically connected to one end of the V-phase winding 82 via a lead wire and the terminal V1. The sliding portion 92c has a terminal W1 connected to its lower portion and is electrically connected to one end of the W-phase winding 83 via a lead wire and the terminal W1. The sliding portion 92d has a terminal W2 connected to its lower portion and is electrically connected to the other end of the W-phase winding 83 via a lead wire and the terminal W2. The sliding portion 92e has a terminal V2 connected to its lower portion and is electrically connected to the other end of the V-phase winding 82 via a lead wire and the terminal V2. The sliding portion 92f has a terminal U2 connected to its lower portion and is electrically connected to the other end of the U-phase winding 81 via a lead wire and the terminal U2.

[0086] The plate portion 94 has holes 95a-f formed therein in which the sliding portion 92 is disposed. In the following description, the holes 95a-f will also be referred to as holes 95 unless they are to be distinguished from one another.

[0087] A sliding portion 92 is disposed in each hole 95. Specifically, sliding portion 92a is disposed in hole 95a. Sliding portion 92b is disposed in hole 95b. Sliding portion 92c is disposed in hole 95c. Sliding portion 92d is disposed in hole 95d. Sliding portion 92e is disposed in hole 95e. Sliding portion 92f is disposed in hole 95f.

[0088] The wiring connection indicator 90 is provided on the non-opposing surface 94a of the plate portion 94, and indicates the wiring state of the winding 8 when the first wiring member 97 or the second wiring member 98 is electrically connected to the sliding portion 92. In this embodiment, the wiring connection indicator 90 displays "Δ" near the first position of the hole 95, and displays "1Y" near the second position of the hole 95.

[0089] As shown in FIG. 18, the first wiring member 97 is provided on the opposing surface 94b of the plate portion 94. The first wiring member 97 is made up of three conductive plates. The first wiring member 97 is wired so that the winding 8 forms a delta connection when the first wiring member 97 is electrically connected to the sliding portion 92. The first wiring member 97 electrically connects the sliding portion 92a to the sliding portion 92d, electrically connects the sliding portion 92b to the sliding portion 92e, and electrically connects the sliding portion 92c to the sliding portion 92f. Note that the copper plate 10 and terminals U, V, and W are not shown in FIG. 18.

[0090] When the sliding portions 92 are disposed in the first positions of the holes 95, all of the sliding portions 92 contact the first wiring members 97 and are electrically connected to the first wiring members 97. Therefore, the windings 8 are delta-connected as shown in FIG.

[0091] As shown in FIG. 20, the second wiring member 98 is provided on the opposing surface 94b of the plate portion 94. The second wiring member 98 is a single electrically conductive plate. The second wiring member 98 is wired so that the winding 8 forms a 1Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92d, the sliding portion 92e, and the sliding portion 92f. Note that the copper plate 10 and the terminals U, V, and W are not shown in FIG. 20.

[0092] The support portion 99 is made up of three insulating plates. When the sliding portion 92 is placed in the second position of the hole 95, the support portion 99 comes into contact with the sliding portion 92, thereby supporting the plate portion 94.

[0093] When sliding portion 92 is disposed in the second position of hole 95, sliding portions 92d, 92e, and 92f contact second wiring member 98 and are electrically connected to second wiring member 98. Sliding portions 92a, 92b, and 92c contact support portion 99. Therefore, winding 8 is 1Y-connected as shown in FIG.

[0094] Next, we will explain the rotational speed and torque of the rotating electric machine 1 for each connection state of the windings 8. When the windings 8 are delta-connected, the phase current is 1 / √3 times the line current and the phase voltage is equal to the line voltage. On the other hand, when the windings 8 are 1Y-connected, the phase current is equal to the line current and the phase voltage is 1 / √3 times the line voltage.

[0095] As the voltage applied to the windings 8 increases, the rotational speed of the rotating electric machine 1 increases. Therefore, if it is desired to increase the rotational speed of the rotating electric machine 1, it is advisable to connect the windings 8 in a delta configuration. Furthermore, as the current flowing through the windings 8 increases, the torque of the rotating electric machine 1 increases. Therefore, if it is desired to increase the torque of the rotating electric machine 1, it is advisable to connect the windings 8 in a 1Y configuration. In this way, the connection state of the windings 8 can be switched depending on the rotational speed or torque that is desired to be output from the rotating electric machine 1.

[0096] The rotating electric machine 1 and connection switching device 9 for the rotating electric machine 1 according to the third embodiment also include a sliding portion 92 that slides between the first position of the hole 95 and the second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0097] Furthermore, in the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 according to the third embodiment, the first wiring member 97 is wired so that the windings 8 are in a delta connection when the first wiring member 97 is electrically connected to the sliding portion 92, and the second wiring member 98 is wired so that the windings 8 are in a 1Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. Therefore, the windings 8 can be easily switched between a delta connection and a 1Y connection depending on the rotational speed or torque that is desired to be output from the rotating electric machine 1.

[0098] Embodiment 4 The fourth embodiment differs from the third embodiment in that holes 95 are formed to extend in one direction between the first position of holes 95 and the second position of holes 95. The differences will be described below.

[0099] 22, the plate portion 94 is formed with a hole 95 in which the sliding portion 92 is disposed. The hole 95 is formed to extend in one direction between a first position of the hole 95 and a second position of the hole 95. The hole 95 is, for example, an elongated hole, and extends in the left-right direction on the plane of FIG.

[0100] As shown in FIG. 23, the first wiring member 97 is provided on the opposing surface 94b of the plate portion 94. The first wiring member 97 is made up of three conductive plates. The first wiring member 97 is wired so that the winding 8 forms a delta connection when the first wiring member 97 is electrically connected to the sliding portion 92. The first wiring member 97 electrically connects the sliding portion 92a to the sliding portion 92d, electrically connects the sliding portion 92b to the sliding portion 92e, and electrically connects the sliding portion 92c to the sliding portion 92f. Note that the copper plate 10 and terminals U, V, and W are not shown in FIG. 23.

[0101] When the sliding portions 92 are disposed in the first positions of the holes 95, all of the sliding portions 92 contact the first wiring members 97 and are electrically connected to the first wiring members 97. Therefore, the winding 8 is delta-connected.

[0102] As shown in FIG. 24, the second wiring member 98 is provided on the opposing surface 94b of the plate portion 94. The second wiring member 98 is a single electrically conductive plate. The second wiring member 98 is wired so that the winding 8 forms a 1Y connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92d, the sliding portion 92e, and the sliding portion 92f. Note that the copper plate 10 and the terminals U, V, and W are not shown in FIG. 24.

[0103] When sliding portion 92 is disposed in the second position of hole 95, sliding portions 92d, 92e, and 92f contact second wiring member 98 and are electrically connected to second wiring member 98. Sliding portions 92a, 92b, and 92c contact support portion 99. Therefore, winding 8 is 1Y-connected.

[0104] The rotating electric machine 1 and connection switching device 9 for the rotating electric machine 1 according to the fourth embodiment also include a sliding portion 92 that slides between the first position of the hole 95 and the second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0105] Embodiment 5. The fifth embodiment differs from the first embodiment in that the winding 8 is 2Y-connected when the sliding portion 92 is electrically connected to the first wiring member 97, and is delta-connected when the sliding portion 92 is electrically connected to the second wiring member 98. The differences are explained below.

[0106] Ends of the winding 8 are electrically connected to terminals. Specifically, one end of the first U-phase winding 81a is electrically connected to terminal U1 via a lead wire. The other end of the first U-phase winding 81a is electrically connected to terminal U2 via a lead wire. One end of the second U-phase winding 81b is electrically connected to terminal U3 via a lead wire. The other end of the second U-phase winding 81b is electrically connected to terminal U4 via a lead wire. One end of the first V-phase winding 82a is electrically connected to terminal V1 via a lead wire. The other end of the first V-phase winding 82a is electrically connected to terminal V2 via a lead wire. One end of the second V-phase winding 82b is electrically connected to terminal V3 via a lead wire. The other end of the second V-phase winding 82b is electrically connected to terminal V4 via a lead wire. One end of the first W-phase winding 83a is electrically connected to terminal W1 via a lead wire. The other end of the first W-phase winding 83a is electrically connected to terminal W2 via a lead wire. One end of the second W-phase winding 83b is electrically connected to terminal W3 via a lead wire. The other end of the second W-phase winding 83b is electrically connected to terminal W4 via a lead wire. Hereinafter, terminals U1, U2, U3, U4, V1, V2, V3, V4, W1, W2, W3, and W4 will be referred to as terminals unless they are to be distinguished from one another.

[0107] 25, a plurality of sliding portions 92a-l are attached to the fixed plate portion 91, and extend in a direction perpendicular to the plane of the fixed plate portion 91. In the following description, the sliding portions 92a-l are also referred to as sliding portions 92 unless they are to be distinguished from one another.

[0108] The sliding portions 92 have terminals connected to their lower portions, and are thereby electrically connected to the ends of the windings 8 via the lead wires and the terminals.

[0109] Specifically, the sliding portion 92a has a terminal U1 connected to its lower portion and is electrically connected to one end of the first U-phase winding 81a via a lead wire and the terminal U1. The sliding portion 92b has a terminal V1 connected to its lower portion and is electrically connected to one end of the first V-phase winding 82a via a lead wire and the terminal V1. The sliding portion 92c has a terminal W1 connected to its lower portion and is electrically connected to one end of the first W-phase winding 83a via a lead wire and the terminal W1. The sliding portion 92d has a terminal U3 connected to its lower portion and is electrically connected to one end of the second U-phase winding 81b via a lead wire and the terminal U3. The sliding portion 92e has a terminal V3 connected to its lower portion and is electrically connected to one end of the second V-phase winding 82b via a lead wire and the terminal V3. The sliding portion 92f has a terminal W3 connected to its lower portion and is electrically connected to one end of the second W-phase winding 83b via a lead wire and terminal W3. The sliding portion 92g has a terminal U2 connected to its lower portion and is electrically connected to the other end of the first U-phase winding 81a via a lead wire and terminal U2. The sliding portion 92h has a terminal V2 connected to its lower portion and is electrically connected to the other end of the first V-phase winding 82a via a lead wire and terminal V2. The sliding portion 92i has a terminal W2 connected to its lower portion and is electrically connected to the other end of the first W-phase winding 83a via a lead wire and terminal W2. The sliding portion 92j has a terminal U4 connected to its lower portion and is electrically connected to the other end of the second U-phase winding 81b via a lead wire and terminal U4. A terminal V4 is connected to a lower portion of sliding portion 92k, and is electrically connected to the other end of second V-phase winding 82b via a lead wire and terminal V4. A terminal W4 is connected to a lower portion of sliding portion 92l, and is electrically connected to the other end of second W-phase winding 83b via a lead wire and terminal W4.

[0110] 25, a terminal U is electrically connected to the sliding portion 92a and a U-phase current is supplied thereto. A terminal V is electrically connected to the sliding portion 92b and a V-phase current is supplied thereto. A terminal W is electrically connected to the sliding portion 92c and a W-phase current is supplied thereto.

[0111] The plate portion 94 has holes 95a-l formed therein in which the sliding portion 92 is disposed. In the following description, the holes 95a-l will also be referred to as holes 95 unless they are to be distinguished from one another.

[0112] A sliding portion 92 is disposed in each hole 95. Specifically, sliding portion 92a is disposed in hole 95a. Sliding portion 92b is disposed in hole 95b. Sliding portion 92c is disposed in hole 95c. Sliding portion 92d is disposed in hole 95d. Sliding portion 92e is disposed in hole 95e. Sliding portion 92f is disposed in hole 95f. Sliding portion 92g is disposed in hole 95g. Sliding portion 92h is disposed in hole 95h. Sliding portion 92i is disposed in hole 95i. Sliding portion 92j is disposed in hole 95j. Sliding portion 92k is disposed in hole 95k. Sliding portion 92l is disposed in hole 95l.

[0113] The wiring connection indicator 90 is provided on the non-opposing surface 94a of the plate portion 94, and indicates the wiring state of the winding 8 when the first wiring member 97 or the second wiring member 98 is electrically connected to the sliding portion 92. In this embodiment, the wiring connection indicator 90 displays "2Y" near the first position of the hole 95, and displays "Δ" near the second position of the hole 95.

[0114] As shown in FIG. 26 , first wiring member 97 is provided on opposing surface 94b of plate portion 94. First wiring member 97 is made up of five conductive plates. First wiring member 97 is wired so that winding 8 forms a 2Y connection when first wiring member 97 is electrically connected to sliding portion 92. First wiring member 97 electrically connects sliding portion 92a to sliding portion 92d, electrically connects sliding portion 92b to sliding portion 92e, electrically connects sliding portion 92c to sliding portion 92f, electrically connects sliding portion 92g to sliding portion 92h to sliding portion 92i, and electrically connects sliding portion 92j to sliding portion 92k to sliding portion 92l.

[0115] When sliding portions 92 are disposed in the first positions of holes 95, all sliding portions 92 contact and are electrically connected to first wiring members 97. Therefore, windings 8 are 2Y-connected as shown in FIG.

[0116] As shown in FIG. 28 , the second wiring member 98 is provided on the opposing surface 94b of the plate portion 94. The second wiring member 98 is made up of six conductive plates. The second wiring member 98 is wired so that the winding 8 is in a delta connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92a to the sliding portion 92l, electrically connects the sliding portion 92b to the sliding portion 92j, electrically connects the sliding portion 92c to the sliding portion 92k, electrically connects the sliding portion 92d to the sliding portion 92g, electrically connects the sliding portion 92e to the sliding portion 92h, and electrically connects the sliding portion 92f to the sliding portion 92i.

[0117] When the sliding portions 92 are disposed in the second positions of the holes 95, all of the sliding portions 92 contact the second wiring members 98 and are electrically connected to the second wiring members 98. Therefore, the winding 8 is delta-connected as shown in FIG.

[0118] The rotation speed and torque of the rotary electric machine 1 for each connection state of the winding 8 will be described. When the winding 8 is delta-connected, the current flowing through the first U-phase winding 81a is 2 / √3 times larger and the voltage applied to the first U-phase winding 81a is √3 / 2 times larger than when the winding 8 is 2Y-connected. The same is true for the second U-phase winding 81b, the first V-phase winding 82a, the second V-phase winding 82b, the first W-phase winding 83a, and the second W-phase winding 83b.

[0119] As the voltage applied to winding 8 increases, the rotation speed of rotating electric machine 1 increases. Therefore, if it is desired to increase the rotation speed of rotating electric machine 1, it is preferable to electrically connect first wiring member 97 and sliding portion 92 and connect winding 8 in a 2Y connection. Furthermore, as the current flowing through winding 8 increases, the torque of rotating electric machine 1 increases. Therefore, if it is desired to increase the torque of rotating electric machine 1, it is preferable to electrically connect second wiring member 98 and sliding portion 92 and connect winding 8 in a Δ connection. In this way, the connection state of winding 8 can be changed depending on the rotation speed or torque that is desired to be output from rotating electric machine 1.

[0120] The rotating electric machine 1 and connection switching device 9 for the rotating electric machine 1 according to the fifth embodiment also include a sliding portion 92 that slides between the first position of the hole 95 and the second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0121] Furthermore, in the rotating electric machine 1 and the connection switching device 9 of the rotating electric machine 1 according to the fifth embodiment, the first wiring member 97 is wired so that the windings 8 are in a 2Y connection when the first wiring member 97 is electrically connected to the sliding portion 92, and the second wiring member 98 is wired so that the windings 8 are in a Δ connection when the second wiring member 98 is electrically connected to the sliding portion 92. Therefore, the windings 8 can be easily switched between a 2Y connection and a Δ connection depending on the rotational speed or torque that is desired to be output from the rotating electric machine 1.

[0122] Embodiment 6 The sixth embodiment differs from the fifth embodiment in that holes 95 are formed to extend in one direction between the first position of holes 95 and the second position of holes 95. The differences will be described below.

[0123] 30, the plate portion 94 is formed with a hole 95 in which the sliding portion 92 is disposed. The hole 95 is formed to extend in one direction between a first position of the hole 95 and a second position of the hole 95. The hole 95 is, for example, an elongated hole, and extends in the left-right direction on the plane of FIG.

[0124] The sliding portion 92a is electrically connected to a terminal U via the copper plate 10, and a U-phase current is supplied to it. The sliding portion 92b is electrically connected to a terminal V via the copper plate 10, and a V-phase current is supplied to it. The sliding portion 92c is electrically connected to a terminal W via the copper plate 10, and a W-phase current is supplied to it.

[0125] As shown in FIG. 31 , the first wiring member 97 is provided on the opposing surface 94b of the plate portion 94. The first wiring member 97 is made up of five conductive plates. The first wiring member 97 is wired so that the winding 8 forms a 2Y connection when the first wiring member 97 is electrically connected to the sliding portion 92. The first wiring member 97 electrically connects the sliding portion 92a to the sliding portion 92d, electrically connects the sliding portion 92b to the sliding portion 92e, electrically connects the sliding portion 92c to the sliding portion 92f, electrically connects the sliding portion 92g to the sliding portion 92h and the sliding portion 92i, and electrically connects the sliding portion 92j to the sliding portion 92k and the sliding portion 92l. Note that the copper plate 10 and the terminals U, V, and W are not shown in FIG. 31 .

[0126] When the sliding portions 92 are disposed in the first positions of the holes 95, all of the sliding portions 92 contact the first wiring members 97 and are electrically connected to the first wiring members 97. Therefore, the windings 8 are 2Y-connected.

[0127] As shown in FIG. 32 , the second wiring member 98 is provided on the opposing surface 94b of the plate portion 94. The second wiring member 98 is made up of six conductive plates. The second wiring member 98 is wired so that the winding 8 is in a delta connection when the second wiring member 98 is electrically connected to the sliding portion 92. The second wiring member 98 electrically connects the sliding portion 92a to the sliding portion 92l, electrically connects the sliding portion 92b to the sliding portion 92j, electrically connects the sliding portion 92c to the sliding portion 92k, electrically connects the sliding portion 92d to the sliding portion 92g, electrically connects the sliding portion 92e to the sliding portion 92h, and electrically connects the sliding portion 92f to the sliding portion 92i. Note that the copper plate 10 and terminals U, V, and W are not shown in FIG. 32 .

[0128] When the sliding portions 92 are disposed in the second positions of the holes 95, all of the sliding portions 92 contact the second wiring members 98 and are electrically connected to the second wiring members 98. Therefore, the winding 8 is delta-connected.

[0129] The rotating electric machine 1 and connection switching device 9 for the rotating electric machine 1 according to the sixth embodiment also include a sliding portion 92 that slides between the first position of the hole 95 and the second position of the hole 95 and is electrically connected to an end of the winding 8, a first wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the first position, and a second wiring member that is electrically connected to the sliding portion 92 when the sliding portion 92 is located at the second position. The first wiring member 97 and the second wiring member 98 are wired so that the connection state of the winding 8 when the first wiring member 97 is electrically connected to the sliding portion 92 differs from the connection state of the winding 8 when the second wiring member 98 is electrically connected to the sliding portion 92. With this configuration, the connection state of the winding 8 can be switched without removing the plate portion 94 from the sliding portion 92, so there is no need to pay attention to the attachment direction of the plate portion 94 when switching the connection state of the winding 8, and it is possible to prevent electrical misconnection between the first wiring member 97 or the second wiring member 98 and the end of the winding 8.

[0130] Although the first to sixth embodiments have been described with reference to examples in which the winding 8 is switched between a 1Y connection and a 2Y connection, between a 1Y connection and a Δ connection, and between a Δ connection and a 2Y connection, other connection states of the winding 8 may also be switched. For example, the winding 8 may be switched between a 1Y connection and a 3Y (triple star) connection.

[0131] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) A connection switching device for a rotating electric machine that switches a connection state of a stator winding of a rotating electric machine, a plate portion having holes and insulating properties; a slider disposed in the hole, sliding between a first position of the hole and a second position of the hole different from the first position, and electrically connected to an end of the winding; a first wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the first position; a second wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the second position; Equipped with The first wiring member and the second wiring member are wired so that the connection state of the winding when the first wiring member is electrically connected to the sliding portion differs from the connection state of the winding when the second wiring member is electrically connected to the sliding portion. (Appendix 2) the first wiring member is wired so that the winding is in a delta connection when the first wiring member is electrically connected to the sliding portion, The connection switching device for a rotating electric machine described in Appendix 1, wherein the second wiring member is wired so that the windings are in a 1Y connection when the second wiring member is electrically connected to the sliding portion. (Appendix 3) the first wiring member is wired so that the winding is in a 1Y connection when the first wiring member is electrically connected to the sliding portion, The connection switching device for a rotating electric machine described in Appendix 1, wherein the second wiring member is wired so that the windings are in a 2Y connection when the second wiring member is electrically connected to the sliding portion. (Appendix 4) the first wiring member is wired so that the winding is in a 2Y connection when the first wiring member is electrically connected to the sliding portion, The connection switching device for a rotating electric machine described in Appendix 1, wherein the second wiring member is wired so that the winding is in a delta connection when the second wiring member is electrically connected to the sliding portion. (Appendix 5) The plate portion is a first plate portion, The device further includes a second plate portion that is disposed opposite the first plate portion and has insulating properties, The sliding portion is provided in plurality, 5. The connection switching device for a rotating electric machine according to claim 1, wherein each of the sliding portions is slidable relative to the first plate portion and fixed relative to the second plate portion. (Appendix 6) the first wiring member is provided on one surface of the plate portion, 6. The connection switching device for a rotating electric machine according to claim 1, wherein the second wiring member is provided on the other surface of the plate portion. (Appendix 7) 6. The connection switching device for a rotating electric machine according to claim 1, wherein the first wiring member and the second wiring member are provided on a surface of the plate portion. (Appendix 8) 8. The connection switching device for a rotating electric machine according to claim 1, wherein the hole is formed such that a portion of the hole extends in a first direction and another portion of the hole extends in a second direction different from the first direction between the first position and the second position. (Appendix 9) 9. The connection switching device for a rotating electric machine according to claim 8, wherein the hole is formed in a substantially U-shape. (Appendix 10) a connection display unit that displays a connection state of the winding when the first wiring member or the second wiring member is electrically connected to the sliding portion; and 10. The connection switching device for a rotating electric machine according to any one of Supplementary notes 1 to 9, further comprising: (Appendix 11) a stator having windings; a plate portion having holes and insulating properties; a slider disposed in the hole, sliding between a first position of the hole and a second position of the hole different from the first position, and electrically connected to an end of the winding; a first wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the first position; a second wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the second position; Equipped with A rotating electric machine in which the first wiring member and the second wiring member are wired such that a connection state of the winding when the first wiring member is electrically connected to the sliding portion differs from a connection state of the winding when the second wiring member is electrically connected to the sliding portion. (Appendix 12) a first step of electrically connecting an end of the stator winding to a sliding portion disposed in a hole in a plate portion; a second step of sliding the sliding portion relative to the plate portion so that either one of a first wiring member provided on the plate portion or a second wiring member provided on the plate portion such that a connection state of the winding when electrically connected to the sliding portion differs from a connection state of the winding when the first wiring member is electrically connected to the sliding portion is electrically connected to the sliding portion; A method for manufacturing a rotating electric machine having the above structure. [Explanation of symbols]

[0132] REFERENCE SIGNS LIST 1 Rotating electric machine, 6 Stator, 8 Winding, 9 Connection switching device, 91 Fixed plate portion, 92 Sliding portion, 94 Plate portion, 94a Non-opposing surface, 94b Opposing surface, 95 Hole, 97 First wiring member, 98 Second wiring member, 90 Connection display portion

Claims

1. A connection switching device for a rotating electric machine that switches a connection state of a stator winding of a rotating electric machine, a plate portion having holes and insulating properties; a slider disposed in the hole, the slider sliding between a first position of the hole and a second position of the hole different from the first position, and electrically connected to an end of the winding; a first wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the first position; a second wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the second position; Equipped with The first wiring member and the second wiring member are wired such that the connection state of the winding when the first wiring member is electrically connected to the sliding portion differs from the connection state of the winding when the second wiring member is electrically connected to the sliding portion.

2. the first wiring member is wired so that the winding is in a delta connection when the first wiring member is electrically connected to the sliding portion, 2. The connection switching device for a rotating electric machine according to claim 1, wherein the second wiring member is wired so that the windings are in a 1Y connection when the second wiring member is electrically connected to the sliding portion.

3. the first wiring member is wired so that the winding is in a 1Y connection when the first wiring member is electrically connected to the sliding portion, 2. The connection switching device for a rotating electric machine according to claim 1, wherein the second wiring member is wired so that the windings are in a 2Y connection when the second wiring member is electrically connected to the sliding portion.

4. the first wiring member is wired so that the winding is in a 2Y connection when the first wiring member is electrically connected to the sliding portion, 2. The connection switching device for a rotating electric machine according to claim 1, wherein the second wiring member is wired so that the winding is in a delta connection when the second wiring member is electrically connected to the sliding portion.

5. The plate portion is a first plate portion, The device further includes a second plate portion that is disposed opposite the first plate portion and has insulating properties, The sliding portion is provided in plurality, The connection switching device for a rotating electric machine according to claim 1 , wherein each of the sliding portions is slidable relative to the first plate portion and fixed relative to the second plate portion.

6. the first wiring member is provided on one surface of the plate portion, The connection switching device for a rotating electric machine according to claim 1 , wherein the second wiring member is provided on the other surface of the plate portion.

7. The connection switching device for a rotating electric machine according to claim 1 , wherein the first wiring member and the second wiring member are provided on a surface of the plate portion.

8. 5. The connection switching device for a rotating electric machine according to claim 1, wherein the hole is formed such that a portion of the hole extends in a first direction and another portion of the hole extends in a second direction different from the first direction between the first position and the second position.

9. 9. The connection switching device for a rotating electric machine according to claim 8, wherein the hole is formed in a substantially U-shape.

10. a connection display unit that displays a connection state of the winding when the first wiring member or the second wiring member is electrically connected to the sliding portion; and The connection switching device for a rotating electric machine according to claim 1 , further comprising:

11. a stator having windings; a plate portion having holes and insulating properties; a slider disposed in the hole, the slider sliding between a first position of the hole and a second position of the hole different from the first position, and electrically connected to an end of the winding; a first wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the first position; a second wiring member provided on the plate portion and electrically connected to the sliding portion when the sliding portion is disposed at the second position; Equipped with A rotating electric machine in which the first wiring member and the second wiring member are wired such that a connection state of the winding when the first wiring member is electrically connected to the sliding portion differs from a connection state of the winding when the second wiring member is electrically connected to the sliding portion.

12. a first step of electrically connecting an end of the stator winding to a sliding portion disposed in a hole in a plate portion; a second step of sliding the sliding portion relative to the plate portion so that either one of a first wiring member provided on the plate portion or a second wiring member provided on the plate portion such that a connection state of the winding when electrically connected to the sliding portion differs from a connection state of the winding when the first wiring member is electrically connected to the sliding portion is electrically connected to the sliding portion; A method for manufacturing a rotating electric machine having the above structure.

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