JP2012016207A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which securely insulates a part between windings of a plurality of phases, which are inserted into a motor stator, and reducing an insulation failure.SOLUTION: A motor includes an interphase insulation A insulating a part between windings of a stator core. The interphase insulation A includes belt-like insulation portions 10 and 20 insulating the part between the windings 3 projected from both end faces in an axial direction of the stator core at both sides of the stator core. The belt-like insulation portions 10 and 20 are connected by a plurality of insulation leg portions 30 inserted into a slot of the stator core. On an inner peripheral side surrounded by the belt-like insulation portions 10 and 20 and insulation leg portions 30b and 30c on the innermost side, projections 10b and 20b obtained by projecting a part of the belt-like insulation portion 10 and/or 20 in the belt-like insulation portions 10 and 20 are arranged in the motor using interphase insulation.

Description

  The present invention relates to an interphase insulating structure in which a plurality of phases of windings are inserted into slots formed by teeth of a stator of an electric motor, and the plurality of windings are insulated.

  Conventionally, as shown in Patent Document 1 (Japanese Utility Model Publication No. 60-31408), a structure of interphase insulation that insulates between windings of a plurality of phases attached to a tooth portion of a stator of an electric motor is as follows. Interphase insulation is used, in which multiple-phase windings protruding from both axial end faces are insulated by respective strip-shaped insulation parts and connected by a plurality of insulation legs inserted into the slots of the stator core. .

  These interphase insulations are provided with a notch portion in which a part of the inner peripheral side of the strip-shaped insulating portion surrounded by the respective strip-shaped insulating portions and insulating leg portions is cut out. As a result, even if the windings protruding from both axial end faces of the stator core are expanded and shaped in the outer diameter direction of the stator with a shaping press or the like in order to put them into the specified dimensions, the cutouts are not formed in the band-shaped insulating part. As a result, the band-shaped insulating portion is prevented from being damaged by being expanded in the direction of the outer diameter of the stator simultaneously with the winding.

  Similarly, in Patent Document 2 (Japanese Utility Model Laid-Open No. 5-55748), when shaping the windings protruding from both axial end surfaces of the stator core, the force applied to the band-shaped insulating portion of the interphase insulation escapes. A notch is provided.

Japanese Utility Model Publication No. 60-31408 Japanese Utility Model Publication No. 5-55748

  The interphase insulation structure of such an electric motor is used as a relief part of the force applied to the band-like insulation part by simultaneously expanding the band-like insulation part of the phase-phase insulation when shaping the winding protruding from both axial end faces of the stator core. A cutout portion is provided by cutting out a part of the belt-like insulating portion on the inner peripheral side surrounded by the belt-like insulating portion and the insulating leg portion. By providing this notch, the band-shaped insulating portion is not bent and broken. However, due to the provision of the notch portions in the strip-like insulating portion, interphase contact frequently occurs between the multiple-phase windings protruding from both axial end surfaces of the stator core. In particular, interphase contact is increased at the rising portion of the winding from the slot opening where the winding is inserted into the slot of the stator core.

  Specifically, the shape of interphase insulation used in a conventional electric motor will be described with reference to FIGS. 5 and 6 show interphase insulations C and D that insulate the windings of the stator of the conventional three-phase induction motor.

  7 shows that the interphase insulation D shown in FIG. 6 is mounted in the slot of the stator 1 between the phase of the outer phase winding 3a and the middle phase winding 3b, and the phase between the middle phase winding 3b and the inner phase winding 3c. In the stator 1 equipped with the interphase insulation C shown in FIG. 5, the interphase insulation C that insulates between the windings of the inner phase winding 3c and the intermediate phase winding 3b protruding from the axial end surface of the stator 1. The figure which looked at the state by which the strip | belt-shaped insulation part 100 is mounted | worn from the inner diameter side of the stator is shown.

  The interphase insulation D in FIG. 6 includes a strip-shaped insulating portion 400 that insulates between the windings of the middle-phase winding 3b and the outer-phase winding 3a of the winding 3 protruding from one axial end face of the stator core, and the other The strip-shaped insulating portion 500 that insulates between the windings of the middle-phase winding 3b and the outer-phase winding 3a of the winding 3 that protrudes from the end surface in the axial direction has an insulating leg. The parts 600 are connected. The insulating leg portion 600 is inserted from a slot opened in the inner diameter direction of the stator after the outer phase winding 3a is inserted into the slot of the stator, and insulates the phase from the intermediate phase winding 3b to be inserted later.

  The interphase insulation C in FIG. 5 includes a strip-like insulating portion 100 that insulates between the inner phase winding 3c and the middle phase winding 3b of the winding 3 protruding from one axial end face of the stator core, and the other The strip-shaped insulating portion 200 that insulates between the windings of the inner-phase winding 3c and the intermediate-phase winding 3b of the winding 3 that protrudes from the axial end surface of the strip-shaped insulating portion 100. They are connected by insulating legs 300. The insulating leg 300 is inserted from the slot opened in the inner diameter direction of the stator after the middle phase winding 3b is inserted into the slot of the stator, and insulates the phase from the inner phase winding 3c to be inserted later. .

  In addition, the strip-shaped insulating portions 100 and 200 are formed in the strip-shaped insulating portions 100 and 200 when the windings 3 protruding from both axial ends of the stator core are shaped to be expanded in the outer diameter direction of the stator and put into a specified dimension. The side edges 100a and 200a of the strip-like insulating portions 100 and 200 surrounded by the strip-like insulating portion 100, the strip-like insulating portion 200, and the innermost insulating leg portion 300 so that they are pulled in the outer diameter direction of the stator and are not broken due to breakage. Notched portions 100C and 200C are provided.

  Further, as can be seen from FIG. 7, the notch 100C (and notch 200C not shown) provided in the band-like insulating part 100 (and not shown in the figure) described above is the stator core. When the coil 3 that protrudes from both axial ends of the wire is expanded and shaped in the stator outer diameter direction so as to have a specified dimension, it is simultaneously pulled and pulled in the stator outer diameter direction, and the slot on the axial end surface of the stator core The rising portion of the inner phase winding 3c that rises from the side may come into contact with the winding of the middle phase winding 3b and cause insulation failure. In addition, the shaded part in the figure is the part where the interphase contact is made.

In a motor equipped with a multi-phase winding in a slot of a stator core and having inter-phase insulation that insulates between the multi-phase windings,
The interphase insulation is provided on both sides of the stator core with strip-shaped insulating portions that insulate the windings of the windings protruding from both axial end faces of the stator core,
The strip-shaped insulating portions provided on both sides of the stator core are connected by a plurality of insulating legs inserted through the slots of the stator core,
On the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
An electric motor using interphase insulation provided with a projecting portion in which a part of at least one of the strip-like insulating portions on both sides of the stator is projected to the inner peripheral side is provided.

  In addition, let the said convex part be an electric motor using the phase insulation made into the convex part protruded in the said inner peripheral side from the base part of the said strip | belt-shaped insulation part and the said insulation leg part.

  Moreover, the said convex part is taken as the electric motor using the phase insulation made into the convex part gradually increased toward the center between the innermost said insulation leg parts.

Further, on the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
An electric motor using interphase insulation provided with a recess formed by cutting out a part of at least one of the strip-like insulating portions on both sides of the stator.

Further, on the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
Protrusions projecting from the respective base portions of at least one of the strip-like insulating portions on both sides of the stator and the innermost insulating leg portions to the inner peripheral side are provided,
Between the convex parts protruding from the respective base parts,
An electric motor using interphase insulation provided with a recess in which a part of the belt-like insulating part is cut out is provided.

  The electric motor is a compressor mounted in the compressor as a driving source for a refrigerator, an air conditioner, or the like.

An electric motor according to the present invention is an electric motor having interphase insulation in which a plurality of windings are mounted in slots of a stator in which slots radially opened in a stator core are arranged in a circumferential direction, and the windings are insulated from each other. And a strip-shaped insulating portion that insulates between the windings of the windings protruding from both axial end faces of the stator core on both sides of the stator core, and each strip-shaped insulating portion is inserted through the slot of the stator core. Connected by a plurality of insulated legs,
On the inner peripheral side surrounded by the respective strip-shaped insulating portions on both sides of the stator core and the insulating legs disposed on both sides facing the innermost side, at least of the strip-shaped insulating portions on both sides of the stator By providing a convex part that protrudes a part of either one of the strip-like insulating parts toward the inner peripheral side,
It is possible to reliably insulate the phase between the windings at the rising portion of the winding from the slot opening where the winding is inserted into the slot of the stator core.

  In addition, the convex part of interphase insulation is a slot opening part which inserted the coil | winding in the slot of a stator core by making it the convex part protruded to the said inner peripheral side from the base of the said strip | belt-shaped insulation part and the said insulation leg part. Thus, it is possible to reliably insulate the phases between the windings at the rising portion of the root portion of the windings.

  Further, the convex portion protruding from the base portion of the strip-shaped insulating portion and the insulating leg portion toward the inner peripheral side is a convex portion that is gradually increased toward the center between the innermost insulating leg portions. When the winding that protrudes from the iron core is expanded in the outer diameter direction of the stator and shaped, the side of the belt-like insulation facing the stator core on the inner circumference surrounded by the belt-like insulation and insulation legs The sides are also expanded in the direction of the outer diameter of the stator, and the band-shaped insulating portion is drawn between the windings inserted in a plurality of phases, resulting in insulation failure. For this reason, the convex part projected to the inner peripheral side is a convex part gradually increased from the base part of the strip-shaped insulating part and the insulating leg part toward the center between the innermost insulating leg parts, thereby forming the strip-shaped insulating part. At the same time, the side of the gradually increased convex part of the belt-like insulating part is pulled in the outer direction of the stator so as to be substantially along the end face of the stator core (substantially parallel) ) It is possible to reliably insulate the windings inserted in multiple phases. In particular, the rising portion of the winding from the stator slot opening can be reliably insulated.

  In addition, on the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating leg portions, at least one of the strip-shaped insulating portions on both sides of the stator. By providing a recess with a part cut out, when the winding is pushed and expanded in the outer diameter direction of the stator, the band-shaped insulating part is also simultaneously expanded in the outer diameter direction of the stator. As a result, the force applied to the strip insulation can be released, preventing damage to the interphase insulation (cutting or tearing), and the strip insulation protrudes from between the windings and comes into contact with the rotor during motor operation. I try not to be.

Further, on the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
The stator core side on the inner peripheral side from the respective bases of the insulating leg portions arranged on both sides facing the innermost inner side of the strip-shaped insulating portion of at least one of the strip-shaped insulating portions on both sides of the stator A protruding part is provided,
Between the convex parts protruding from the respective base parts,
By making the electric motor provided with a recess cut out a part of the band-like insulating part,
Even if the strip insulation part is expanded in the outer diameter direction of the stator by shaping the stator winding, the slot opening of the stator core is provided by the convex part of the strip insulation part while releasing the force applied to the strip insulation part. It is possible to reliably insulate the phase between the windings at the rising portion of the winding from the portion.

  Further, by using the electric motor for a compressor mounted in a compressor as a driving source for a refrigerator, an air conditioner or the like, it is possible to use an electric motor that reliably insulates windings inserted in a plurality of phases into a stator slot, It can be set as the compressor which reduced the insulation defect.

Interphase insulation A used for the electric motor of this embodiment. The interphase insulation B used for the electric motor in another embodiment. FIG. 3 is a layout diagram when the interphase insulation shown in FIGS. 1 and 2 is used in an electric motor. The arrow view of the electric motor shown in FIG. Interphase insulation C used in conventional motors. The interphase insulation D used for the electric motor in another conventional embodiment. Electric motor when conventional interphase insulation is used.

Embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 has shown the phase insulation A and B used for the electric motor of this embodiment.
The interphase insulations A and B shown in the present embodiment are arranged such that slots 3 opened in the inner diameter direction of the stator core are arranged in the circumferential direction, and the winding 3 wound by an external winding machine is used as a winding insertion machine. Thus, the electric motor is inserted into the slot of the stator 1. The winding method used in this embodiment uses a distributed winding method, but is not limited thereto.

  In the winding 3 inserted into the slot of the stator 1 of this embodiment by a winding insertion machine, an outer phase winding 3a, an intermediate phase winding 3b, and an inner phase winding 3c are wound by external winding machines, respectively. This is a three-phase induction motor in which an outer phase winding 3a, an intermediate phase winding 3b, and an inner phase winding 3c are inserted in this order. After the outer phase winding 3a is inserted into the slot of the stator 1, the insulation leg 60 of the interphase insulation B shown in FIG. 2 is inserted from the slot opening that opens to the inner diameter side of the stator, and one stator core A band-shaped insulating portion 40 is arranged so as to cover the portion facing the stator inner diameter side of the outer phase winding 3a protruding from the end face, and similarly, the stator inner diameter side of the outer phase winding 3a protruding from the other stator core end face A band-shaped insulating portion 50 is disposed so as to cover the portion facing the surface.

  Next, the intermediate phase winding 3b is inserted into the inner diameter side where the interphase insulation B is disposed by a winding insertion machine, and the insulation leg portion of the interphase insulation A shown in FIG. 30 is inserted, and the band-shaped insulating portion 10 is arranged so as to cover the portion facing the inner diameter side of the stator of the intermediate phase winding 3b protruding from one end face of the stator core. Similarly, from the end face of the other stator core The strip-shaped insulating portion 20 is arranged so as to cover the portion of the winding 3b that protrudes facing the inner diameter side of the stator. Then, the inner phase winding 3c is inserted by a winding insertion machine on the inner diameter side of the stator of the interphase insulation A covering the intermediate phase winding 3b inserted in the slot of the stator 1.

  As described above, the interphase insulation A shown in FIG. 1 is an interphase insulation that insulates between windings protruding from both axial end surfaces of the stator core, and protrudes from one axial end surface of the stator core. In addition, a strip-shaped insulating portion 10 that insulates between the intermediate phase winding 3b and the inner phase winding 3c, a middle phase winding 3b that protrudes from the other axial end surface of the stator core, and an inner phase winding 3c. It has the strip | belt-shaped insulation part 20 which insulates between these windings, and is comprised by the insulation leg part 30 which connects the strip | belt-shaped insulation part 10 and the strip | belt-shaped insulation part 20. The insulating leg 30 is inserted from the slot opened in the inner diameter direction of the stator after the middle-phase winding 3b is inserted into the slot of the stator, and insulates the phase from the inner-phase winding 3c to be inserted later. ing.

  In addition, when the strip-shaped insulating portions 10 and 20 are shaped so that the windings 3 protruding from both axial ends of the stator core are expanded in the outer diameter direction of the stator so as to fall within the specified dimensions, the strip-shaped insulating portions 10 and 20 Sides 10a, 20a of the innermost strip-shaped insulating portions 10, 20 surrounded by the strip-shaped insulating portion 10, the strip-shaped insulating portion 20, and the insulating leg portions 30 so that 20 is pulled in the outer diameter direction of the stator and is not cut and damaged. Notched portions 10c and 20c are provided. In the embodiment of FIG. 1, on the inner peripheral side surrounded by the strip-shaped insulating portions 10, 20 and the insulating legs 30 b and 30 c connecting the strip-shaped insulating portions 10, 20, the inner peripheral side of one strip-shaped insulating portion 10 A notch portion 10c in which the side 10a is cut out, and a notch recess in the notch portion 20c in which the side 20a on the inner peripheral side of the other band-shaped insulating portion 20 is cut out are provided.

  Further, by providing the notches 10c and 20c on the inner peripheral sides 10a and 20a of the strip-shaped insulating parts 10 and 20, the expanded winding 3 is shaped in the stator outer diameter direction so as to fall within the specified dimensions. At this time, even if the winding 3 is pushed and expanded in the direction of the outer diameter of the stator, the strip-like insulating portions 10 and 20 do not protrude from between the windings to the inner diameter side of the stator. It will not be bad

In addition, the strip-shaped insulating portions 10 and 20 of the interphase insulation A in the embodiment of FIG. 1 include the innermost strip-shaped insulating portions 10 and 20 surrounded by the two strip-shaped insulating portions 10 and 20 and the two insulating leg portions 30. In the state where the side edges 10a and 20a are fitted with the interphase insulation A in the slots of the stator core, at least one of the side edges 10a and 20a of the belt-like insulating portions 10 and 20 is part of the inner peripheral side (in the drawing) Protrusions that protrude toward the end face of the stator core (inside the dotted line) are provided. The strip-shaped insulating portion 10 of the interphase insulation A is provided with a convex portion 10b projecting a part of the side 10a toward the inner peripheral stator core end surface, and the strip-shaped insulating portion 20 has a stator core end surface side. Convex part 20b which protruded a part of side 20a facing is provided.
Accordingly, interphase insulation between windings inserted in a plurality of phases can be reliably performed at the winding rising portion from the slot opening of the stator core.

  In the embodiment of the interphase insulation A, from the base of the innermost strip-shaped insulating portion 10 and the insulating leg portions 30b, 30c surrounded by the two strip-shaped insulating portions 10, 20 and the two insulating leg portions 30b, 30c. Two protrusions 10b projecting the side 10a of the strip-shaped insulating portion 10 toward the inner peripheral side, and the side 20a of the strip-shaped insulating portion 20 from the base of the strip-shaped insulating portion 20 and the insulating legs 30b, 30c Two protruding portions 20b protruded toward the peripheral side are protruded toward the stator core end face side on the inner peripheral side.

  In addition, the two portions of the convex portions 10b that project the side 10a of the strip-shaped insulating portion 10 from the base portions of the strip-shaped insulating portion 10 and the insulating leg portions 30b and 30c are surrounded by the innermost insulating legs 30b and 30c. Further, the convex portion 10b is formed so as to go toward the center between the adjacent insulating legs 30b and 30c on the inner peripheral side and gradually increase as the distance from the insulating legs 30b and 30c increases. Similarly, the two portions of the convex portions 20b that project the side 20a of the strip-shaped insulating portion 20 from the base portions of the strip-shaped insulating portion 20 and the insulating leg portions 30b and 30c are surrounded by the innermost insulating legs 30b and 30c. Further, the convex portions 20b are formed so as to go toward the center between the adjacent insulating legs 30b and 30c on the inner peripheral side, and gradually increase as the distance from the insulating legs 30b and 30c increases.

  Similarly to FIG. 1, the interphase insulation B in FIG. 2 is an interphase insulation that insulates between the windings protruding from both axial end surfaces of the stator core, and protrudes from one axial end surface of the stator core. A strip-shaped insulating portion 40 that insulates between the outer-phase winding 3a and the intermediate-phase winding 3b, and a winding between the outer-phase winding 3a and the intermediate-phase winding 3b that protrudes from the other axial end surface of the stator core. It has the strip | belt-shaped insulation part 50 which insulates between, and is comprised by the insulation leg part 60 which connects the strip | belt-shaped insulation part 40 and the strip | belt-shaped insulation part 50. The insulating leg 60 is inserted from the slot opened in the inner diameter direction of the stator after the outer phase winding 3a is inserted into the slot of the stator, and insulates the phase with the intermediate phase winding 3b to be inserted later. Yes.

  In addition, when the winding 3 protruding from both axial ends of the stator core is expanded in the outer diameter direction of the stator and shaped so as to fall within the specified dimensions, the belt-like insulating part 50 is formed on the belt-like insulating part 50. A cutout portion 50C is provided by notching the innermost strip-like insulating portion 50 surrounded by the strip-like insulating portions 40, 50 and the insulating leg portions 60 so as to be pulled in the outer diameter direction and not cut and damaged. In the embodiment of FIG. 2, the inner peripheral side of the strip-shaped insulating portion 50 on the inner peripheral side surrounded by the strip-shaped insulating portions 40 and 50 and the insulating legs 60 d and 60 e that connect the strip-shaped insulating portions 40 and 50 is cut out. A notch recess in the notch 50c is provided.

  This is because a part of the strip-like insulating portion 50 is cut out on the inner peripheral side surrounded by the strip-like insulating portions 40, 50 on both sides of the stator core and the innermost insulating leg portions 60d, 60e. By providing the notch recess in the portion 50c, when the winding 3 is pushed and expanded in the outer diameter direction of the stator, the band-like insulating portion 50 is also simultaneously expanded in the outer diameter direction of the stator. The applied force can be relieved to prevent the interphase insulation B from being damaged (cut or broken), and the strip-shaped insulating portion 50 does not protrude from between the windings.

Further, in the band-shaped insulating part 50 of the interphase insulation B of the embodiment of FIG. 2, a side 50 a of the innermost band-shaped insulating part 50 surrounded by the two band-shaped insulating parts 40, 50 and the two insulating legs 60 is provided. In a state where the interphase insulation B is mounted in the slot of the stator core, a part of the side 50a of the strip-like insulating portion 50 is protruded toward the end surface side of the stator core on the inner peripheral side (inside the dotted line in the figure). Protrusions are provided. The band-shaped insulating portion 50 of the interphase insulation B is provided with a convex portion 50b that protrudes from the side 50a toward the inner peripheral stator core end face.
Accordingly, interphase insulation between windings inserted in a plurality of phases can be reliably performed at the winding rising portion from the slot opening of the stator core.

  In the embodiment of the interphase insulation B, from the base of the innermost strip-shaped insulating portion 50 and the insulating leg portions 60d, 60e surrounded by the two strip-shaped insulating portions 40, 50 and the two insulating leg portions 60d, 60e. Two convex portions 50b are formed by projecting the side 50a of the strip-shaped insulating portion 50 toward the inner peripheral side, and project toward the stator core end face side on the inner peripheral side.

In addition, the two portions of the convex portions 50b in which the side portions 50a of the strip-shaped insulating portion 50 protrude from the base portions of the strip-shaped insulating portion 50 and the insulating leg portions 60d and 60e are surrounded by the innermost insulating legs 60d and 60e. Further, the convex portions 50b are formed so as to go toward the center between the adjacent insulating legs 60d and 60e on the inner peripheral side, and gradually increase as the distance from the insulating legs 60d and 60e increases.
In addition, although the notch part 50c of the strip | belt-shaped insulation part of the phase insulation B in FIG. 2 of this embodiment is provided only in the strip | belt-shaped insulation part 50, you may provide similarly to the strip | belt-shaped insulation part 40, and the same effect is provided. And can be added or deleted as appropriate.

  FIG. 3 shows a state in which the interphase insulation A in FIG. 1 and the interphase insulation B in FIG. 2 are interposed between the windings of the stator. An interphase insulation B (two sheets) is interposed between the intermediate phase winding 3b and the outer phase winding 3a, and an interphase insulation A (2 between the inner phase winding 3c and the intermediate phase winding 3b of the winding 3 is provided. ). The stator 1 shown in the present embodiment has a slot NO. 1-NO. It is a three-phase induction motor having 36 slots.

  Two pieces of interphase insulation B in FIG. 2 are interposed. The insulation legs 60a to 60h of the interphase insulation B are inserted into the slots of the stator 1 after inserting the outer phase winding 3a into the slots of the stator 1. 9 and 8 through the insulation legs 60a and 60b of the interphase insulation B, and the slot NO. 5 and 4 through interphase insulating legs 60c and 60d, and slot NO. 33, 32 through the insulation legs 60e, 60f of the interphase insulation B, and the slot NO. 29 and 28 are provided with insulation legs 60g and 60h of interphase insulation B.

  Similarly, the insulation legs 60a to 60h of the other interphase insulation B are inserted into the slot NO. 27, 26 through the insulation legs 60a, 60b of the interphase insulation B, and the slot NO. 23 and 22 are provided with interphase insulating legs 60c and 60d, and slot NO. 15 and 14 through the insulation legs 60e and 60f of the interphase insulation B, and the slot NO. 11 and 10 are inserted through the insulation legs 60g and 60h of the interphase insulation B, and then the intermediate phase winding 3b is inserted. This insulates the phase between the outer phase winding 3a and the middle phase winding 3b.

  Also, two interphase insulations A in FIG. 1 are interposed. The insulation legs 30a to 30d of the interphase insulation A are inserted into the slots NO. 5 and 4 through the insulation legs 30a and 30b of the interphase insulation A, and the slot NO. 27 and 26 are provided with insulating legs 30c and 30d for interphase insulation.

  Similarly, the insulation legs 30a to 30d of the other interphase insulation A are inserted into the slots of the stator 1 after inserting the intermediate phase winding 3b into the slots of the stator 1. 23, 22 through the insulation legs 30a, 30b of the interphase insulation A, and the slot NO. 9 and 8 are inserted through interphase insulating legs 30c and 30d, and then an internal phase winding 3c is inserted. As a result, the intermediate phase winding 3b and the inner phase winding 3c are insulated from each other.

4 is a partially enlarged view seen from the direction of the arrow shown in FIG.
The interphase insulation B shown in FIG. 2 is mounted between the outer phase winding 3a, the intermediate phase winding 3b and the winding in the stator slot, and the intermediate phase winding 3b and the inner phase winding 3c are connected between the windings. In the stator 1 equipped with the interphase insulation A shown in Fig. 1, the strip insulation of the interphase insulation A that insulates between the windings of the inner phase winding 3c and the intermediate phase winding 3b protruding from the axial end surface of the stator 1 The state which insulated the phase by the part 10 is shown.

In FIG. 4, the windings 3 protruding from both axial ends of the stator core are expanded and shaped in the direction of the outer diameter of the stator in order to obtain a shape having a specified dimension. The strip-shaped insulating portion 10 of the interphase insulation A includes a side 10a of the inner peripheral strip-shaped insulating portion 10 surrounded by the strip-shaped insulating portion 10 and the insulating leg portions 30b and 30c. A protruding portion 10b is provided.
The convex part 10b projected to the inner peripheral side is gradually increased from the base part 10d of the strip-like insulating part 10 and the insulating leg part 30b (same for 30c) toward the center between the innermost insulating leg parts 30b and 30c. The convex portion 10b is used. The winding 3 is pushed and expanded in the outer diameter direction of the stator in the band-shaped insulating portion 10, and at the same time, the side 10 a of the convex portion 10 b that is gradually increased in the band-shaped insulating section 10 is pulled in the outer diameter direction of the stator. It is arranged so as to be substantially along the end surface (substantially parallel). Thus, when the winding 3 is shaped, even if the strip-like insulating portion 10 is pulled in the outer diameter direction of the stator and is wound between the middle-phase winding 3b and the inner-phase winding 3c, the winding 3 rises from the slot. In this part, the windings 3 are in contact with each other so that insulation failure does not occur. In addition, the convex part 20b which the side 20a of the strip | belt-shaped insulation part 20 protruded to the stator core end surface side has the same effect.

  Further, although not visible in FIG. 4, the side 50a of the band-shaped insulating part 50 of the phase-insulating B, like the phase-phase insulating A, is arranged on the inner peripheral side surrounded by the band-shaped insulating parts 40, 50 and the insulating leg parts 60d and 60e. The side 50a of the band-shaped insulating part 50 is provided with a convex part 50b protruding from the inner peripheral side stator core end surface, so that when the winding 3 is shaped, the band-shaped insulating part 50 is formed in the stator outer diameter direction. Is pulled and wound between the outer-phase winding 3a and the intermediate-phase winding 3b, there is no contact between the windings 3 at the rising portion of the winding 3 from the slot.

  In addition, the side part 10a of the strip | belt-shaped insulation part 10 from the base part 10d of the root part which connected the strip | belt-shaped insulation part 10 and the insulation leg part 30b of the phase insulation A, and the strip | belt-shaped insulation part 10 and the insulation leg part 30c. Is provided with a protruding portion 10b protruding toward the end face of the stator core. Similarly, the side 20a of the strip-shaped insulating portion 20 is connected to the root portion of the stator core from the base portion 20d connecting the strip-shaped insulating portion 20 and the insulating leg 30b and the base portion 20d connecting the strip-shaped insulating portion 20 and the insulating leg 30c. A protruding portion 20b is provided. Thus, even if the winding 3 inserted in the stator core is pushed and expanded in the outer diameter direction of the stator, the insulating legs 30b disposed at the same position as the inner-phase winding 3c inserted in the slot of the stator core. By providing the convex portions 10b and 20b at the root portion of 30c, even if the interphase insulation A is pulled in the outer diameter direction of the stator, the rising portions of the intermediate phase winding 3b and the inner phase winding 3c from the stator core It will not touch and will not cause poor insulation.

  In addition, the base connecting the strip-shaped insulating portion 10 and the insulating leg portions 30b and 30c on the inner peripheral side surrounded by the two strip-shaped insulating portions 10 and 20 of the interphase insulation A and the innermost two insulating legs 30b and 30c. The base 10d of the base part connecting the belt-like insulating part 20 and the insulating legs 30b and 30c, and the convex part 10b in which the side 10a of the belt-like insulating part 10 protrudes from the base part 10d of the part to the stator core end face side on the inner peripheral side. A convex portion 20b in which the side 20a of the strip-shaped insulating portion 20 protrudes from the inner peripheral side to the stator core end face side from 20d is surrounded by the strip-shaped insulating portions 10 and 20 and the innermost insulating legs 30b and 30c. It goes to the center between the adjacent insulating legs 30b and 30c on the circumferential side, and gradually increases as they are separated from the insulating legs 30b and 30c, respectively.

  This is because when the winding 3 is pushed and expanded in the outer diameter direction of the stator, the base portions 10d and 20d of the insulating leg portions 30b and 30c of the interphase insulation A serve as a base point, The inner phase winding 3c and the middle phase winding 3b rising from the end surface side of the stator core are in contact with each other so that insulation failure does not occur. In addition, when the width of the base portion of the strip-like insulating portions 10 and 20 of the base portions 10d and 20d is increased, elastic force is applied to the base portion of the interphase insulation A when the winding 3 is expanded and shaped in the stator outer diameter direction. And easily break.

  Further, when the winding 3 is pushed and expanded in the outer diameter direction of the stator, in order to prevent the band-like insulating parts 10 and 20 of the interphase insulation A from being elastic and not damaged, the band-like insulating parts 10 and 20; Notched portions 10c and 20c are formed in at least one of the strip-shaped insulating portions 10 and 20 between the insulating leg portions 30b and 30c surrounded by the innermost insulating leg portions 30b and 30c. Thereby, even if the winding 3 is pushed and expanded in the outer diameter direction of the stator, the interphase insulation A is not cut and damaged.

  In addition, by shaping the expanded winding 3 in the direction of the outer diameter of the stator, the interphase insulation A is pushed out from between the respective coils to the inner diameter side of the stator on the stator core side, and does not jump out. The winding 3 can be easily placed in the specified shaping dimensions without having to

  Further, in the present embodiment, the strip-shaped insulating portion 10 between the convex portions 10b (20b) in which the side 10a (20a) of the base portion 10d (20d) of at least one of the strip-shaped insulating portions 10 and 20 of the interphase insulation A is projected. Is provided so as to be a recess 10c (20c) in which a part of it is cut out. Accordingly, when the winding 3 is pushed and expanded in the outer diameter direction of the stator, the band-shaped insulating portion 10 (20) is prevented from being damaged because the winding 3 is notched so as to release the force applied to the band-shaped insulating portion 10 (20). In addition, the interphase contact at the rising portion of the winding 3 in the inner-phase winding 3c and the intermediate-phase winding 3b is prevented, and the belt-like insulating portion 10 (20) is located between the winding and the stator inner diameter side. It does not protrude and contact the rotor during operation of the electric motor, so that the electric motor does not fail to drive.

  Similarly, in FIG. 2 of the present embodiment, a base portion connecting the strip-shaped insulating portion 50 of the interphase insulation B and the insulating leg portion 60d, and a base portion 50d of the root portion connecting the strip-shaped insulating portion 50 and the insulating leg portion 60e. The side 50a of the strip-shaped insulating portion 50 is provided with a convex portion 50b protruding toward the end surface of the stator core. Thereby, even if the winding 3 inserted in the stator core is pushed and expanded in the outer diameter direction of the stator, the insulating legs 60d disposed at the same position as the outer phase winding 3a inserted in the slot of the stator core, By providing the convex part 50b at the base part of 60e, even if the interphase insulation B is pulled in the outer diameter direction of the stator, the outer phase winding 3a and the intermediate phase winding 3b come into contact with each other at the rising part from the stator core to insulate. It will not be bad.

  In addition, the base connecting the strip-shaped insulating portion 50 and the insulating leg portions 60d and 60e on the inner peripheral side surrounded by the two strip-shaped insulating portions 40 and 50 of the interphase insulation B and the innermost two insulating legs 60d and 60e. The convex part 50b in which the side 50a of the strip-like insulating part 50 protrudes from the base part 50d of the part toward the stator core end surface on the inner peripheral side includes the two strip-like insulating parts 40 and 50 and the two innermost insulating legs 60d. , 60e toward the center between adjacent insulating legs 60d and 60e on the inner periphery side, and gradually increase as they are separated from the insulating legs 60d and 60e, respectively.

  This is because, when the winding 3 is expanded and shaped in the stator outer diameter direction, the base 50d of the insulation leg portions 60d and 60e of the interphase insulation B serves as a base point, and even if the stator 3 is greatly pulled in the stator outer diameter direction, the stator The outer-phase winding 3c and the intermediate-phase winding 3b rising from the end surface side of the iron core are in contact with each other so that insulation failure does not occur. If the width of the base part of the strip-like insulating part 50 of the base part 50d is only increased, the base part of the interphase insulation B does not have elasticity and is easily damaged when the winding 3 is expanded and shaped in the outer diameter direction of the stator. Become.

  Further, when the winding 3 is pushed and expanded in the outer diameter direction of the stator, the two strip-like insulating portions 40, 50 are not damaged in order to prevent the strip-like insulating portion 50 of the interphase insulation B from being elastically damaged. A cutout portion 50c is provided in the strip-like insulating portion 50 between the insulating leg portions 60d and 60e surrounded by the two innermost insulating leg portions 60d and 60e. Thereby, even if the winding 3 is pushed and expanded in the outer diameter direction of the stator, the interphase insulation B is not torn and damaged.

  Further, by shaping the expansion coil 3 in the direction of the outer diameter of the stator, the interphase insulation B is not pushed out from between the windings to the stator core side, and does not jump out, and the interphase insulation B is not reworked. The winding 3 can easily be put into the specified shaping dimensions.

Further, in the present embodiment, the band-shaped insulating part 50 of the interphase insulation B is provided so as to be a concave part 50c in which a part of the band-shaped insulating part 50 is cut out between the convex parts 50b projecting the side 50a of the base part 50d. . This
When the winding 3 is pushed and expanded in the outer diameter direction of the stator, it is notched so as to release the force applied to the strip-shaped insulating portion 50, so that the strip-shaped insulating portion 50 can be prevented from being damaged. Interphase contact at the rising portion of the winding 3 in the winding 3b and the outer phase winding 3a can be prevented. Although the cutout portion is provided only in the strip-shaped insulating portion 50, the same effect can be obtained even if the cut-out portion is similarly provided in the strip-shaped insulating portion 40, and can be appropriately added and deleted.

  In addition, by using these interphase insulation structures, it is possible to reliably insulate between the windings inserted in a plurality of phases in the stator slot, and to provide an electric motor with reduced insulation failure. As a drive source, it can be used as an electric motor mounted on a compressor.

A, B, C, D ... Interphase insulation 1 ... Stator 3 ... Winding 3a ... Outer phase winding 3b ... Middle phase winding 3c ... Inner phase winding 10, 20, 40, 50, 100, 200, 400, 500... Band-shaped insulating portions 10 a, 20 a, 40 a, 50 a, 100 a, 200 a, 400 a, 500 a... Side 10 b, 20 b, 50 b. Part 10c, 20c, 50c, 100c, 200c... Notched part 10d, 20d, 50d ... Base 30, 30a-30d, 60, 60a-60h, 300, 300a-300d, 600, 600a-600h ..Insulated legs

Claims (6)

In a motor equipped with a multi-phase winding in a slot of a stator core and having inter-phase insulation that insulates between the multi-phase windings,
The interphase insulation is provided on both sides of the stator core with strip-shaped insulating portions that insulate the windings of the windings protruding from both axial end faces of the stator core,
The strip-shaped insulating portions provided on both sides of the stator core are connected by a plurality of insulating legs inserted through the slots of the stator core,
On the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
An electric motor using interphase insulation, characterized in that a convex portion is formed by projecting a part of at least one of the strip-like insulating portions on both sides of the stator toward the inner peripheral side.   2. The electric motor using interphase insulation according to claim 1, wherein the convex portion is a convex portion that protrudes toward the inner peripheral side from a base portion of the strip-shaped insulating portion and the insulating leg portion.   The electric motor using interphase insulation according to claim 1, wherein the convex portion is a convex portion that is gradually increased toward the center between the innermost insulating leg portions. On the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
4. The interphase according to claim 1, further comprising a recess formed by cutting out a part of at least one of the strip-shaped insulating portions on both sides of the stator. 5. Electric motor using insulation. On the inner peripheral side surrounded by the strip-shaped insulating portions on both sides of the stator core and the innermost insulating legs,
Protrusions projecting from the respective base portions of at least one of the strip-like insulating portions on both sides of the stator and the innermost insulating leg portions to the inner peripheral side are provided,
Between the convex parts protruding from the respective base parts,
The electric motor using interphase insulation according to any one of claims 1 to 4, wherein a concave portion in which a part of the belt-like insulating portion is cut out is provided.   6. The compressor according to claim 1, wherein the electric motor is mounted in a compressor as a drive source for a refrigerator, an air conditioner, or the like.

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