JP2002119001A - Motor with concentrated winding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide parallel connection of two rows, formed by series connection of two coils for each phase which is attached to a stator. SOLUTION: An insulator 42 with four annular grooves 44 is arranged on attaching ends of a total of twelve three-phase coils 30, attached to a stator 28 for a motor 20 with concentrated winding. Each phase is formed by parallel connection of the two rows, formed by series connection of the two coils 30 to the four grooves 44 of the insulator 42, and connection coils 50 are arranged so that strands thereof do not intersect with each other. The ends 56 of the wire coils 50 are arranged on the outer periphery of the insulator 42 at intervals with an angle of 15 degrees and connected to a lead 32 for the coil 30 through a crimping terminal 62, and the ends 55 of the connection coils 50 are arranged on the inner periphery at intervals with an angle of 120 degrees and connected to an input/output terminal 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrated winding motor, and more particularly, to a concentrated winding motor in which a plurality of coils attached to a stator core are connected in series and connected in parallel to each other.

[0002]

2. Description of the Related Art Conventionally, as a concentrated winding motor of this type,
A device using an end plate having three parallel grooves provided with connection coils of each phase has been proposed (for example, Japanese Patent Application Laid-Open No.
248187). In this concentrated winding motor, connection coils connected to the input / output terminals of each phase are mounted in three grooves of the end plate, and four coils of the same phase are connected to the connection coils of each phase, thereby forming the coils of the same phase. They are connected in parallel.

[0003]

However, in such a concentrated winding motor, it is difficult to perform connection other than the connection in which all the coils of the same phase are connected in parallel. In the case of a connection in which in-phase coils are connected in series and connected in parallel,
For example, in the case of a connection in which two coils are connected in series and the two rows are connected in parallel, a connection coil connected to input / output terminals and a connection coil for connecting the coils in series are connected to the coils of each phase. Since it is necessary, the connection cannot be made simply by the connection coil connected to the input / output terminal.

It is an object of the concentrated winding motor of the present invention to connect coils of the same phase in series and in parallel to save space.

[0005]

Means for Solving the Problems and Their Functions and Effects The concentrated winding motor of the present invention employs the following means in order to achieve the above object.

A concentrated winding motor according to the present invention is a concentrated winding motor in which a plurality of coils attached to a stator core are connected in series and connected in parallel to each other to connect each phase, and the plurality of coils attached to the stator core are attached. An annular member disposed at an end portion and having a plurality of parallel annular grooves, mounted in the plurality of grooves of the annular member, and connected to and inserted into some of the plurality of coils for each phase. An input / output connection coil connected to an output terminal; a coil mounted in a plurality of grooves of the annular member and connected to the input / output connection coil of the plurality of coils for each phase; and the input / output connection A gist of the present invention includes a coil connection coil for connecting a coil not connected to the coil.

In the concentrated winding motor of the present invention, the input / output connection coil is connected to the coil and connected to the input / output terminal, and the coil connected to the input / output connection coil and the input / output connection coil. By connecting an annular member having a plurality of grooves for mounting a coil and a connecting coil for connecting a coil at the mounting end of the plurality of coils mounted on the stator core, coils having the same phase are connected in series and connected in parallel. And the space required for the connection can be reduced.

[0008] In such a concentrated winding motor of the present invention,
The connection portion between the input / output connection coil and the coil connection coil may be evenly arranged on the outer peripheral side of the annular member. In this case, since the connection can be made on the outer peripheral side, the connection can be easily performed as compared with the case where the connection is made on the inner peripheral side.

Further, in the concentrated winding motor according to the present invention, a connection portion between the input / output connection coil and the coil connection coil is connected by a crimp terminal for connecting the plurality of coils by crimping. You can also.
In this case, the connection can be easily made.

Further, in the concentrated winding motor of the present invention,
In the input / output terminal, each phase may be uniformly arranged on the inner peripheral side of the annular member. In this case, the electric motor can be well-balanced.

Alternatively, in the concentrated winding motor according to the present invention, the input / output terminals may be arranged such that respective phases are concentrated at one location on the outer peripheral side of the annular member. This allows input / output of each phase from one location.

In the concentrated winding motor according to the present invention, the annular member may be formed in a short tube, and the plurality of grooves may be formed on an outer peripheral surface. By doing so, the radial space of the rotor of the electric motor required for connection can be reduced.

In the concentrated winding motor according to the present invention, the annular member may be formed in an annular shape, and the plurality of grooves may be formed in a radial direction. By doing so, the space in the axial direction of the rotor of the electric motor required for connection can be reduced. In the concentrated winding motor according to the aspect of the present invention, a case is formed in which an outer peripheral portion of the annular member is formed as a tapered portion having a predetermined angle, and an annular member holding portion that can be aligned with the outer peripheral portion of the annular member is formed. May be provided. In this case, it is possible to more reliably hold the annular member.

In the concentrated winding motor according to the present invention, when the input / output connection coil and the coil connection coil are mounted in the plurality of grooves, the input / output connection coil and the coil connection coil are provided. May be provided. This way,
It is possible to prevent the input / output connection coil or the coil connection coil from coming off the groove.

In the concentrated winding motor according to the present invention, the input / output connection coil and the coil connection coil are formed by wires having substantially the same cross-sectional shape as the wires forming the plurality of coils. You can also. This way,
It is possible to reduce the size of the motor as compared with a case where the input / output connection coil and the coil connection coil are formed by wires having different cross-sectional shapes.

Further, in the concentrated winding motor according to the present invention, the motor is a three-phase concentrated winding motor in which two rows of two coils connected in series are connected in parallel, and the annular member has four grooves. The input / output connection coil is connected to two coils located at a position of 60 degrees for each phase, and the coil connection coil is connected to the input / output connection coil for each phase. It is also possible to use two coils for connecting the unconnected coil to the input / output connection coil located at the position of 60 degrees.

[0017]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of a concentrated winding motor 20 according to one embodiment of the present invention. The centralized motor 20 of the embodiment is configured as a PM-type synchronous motor, and as shown, a rotor 26 attached to a rotating shaft 22, a stator 28 attached and fixed to a case 24, and teeth of the stator 28. And a connection portion 40 disposed at the mounting end of the coil 30 of each phase and connecting the coil 30 of each phase. The twelve coils 30 are evenly arranged on the stator 28 at an angle of 90 degrees, and are connected by a connection part 60 so that two rows connected in series are connected in parallel to form a three-phase coil ( U phase, V phase, W
Phase). The rotor 30 and the stator 40
Is configured as a general PM-type synchronous motor and does not form the core of the present invention, and therefore, further detailed description is omitted.

The connecting portion 40 is formed of a ring-shaped 4 parallel to the radial direction.
The insulator 42 in which one groove 44 is formed,
The connection coil 50 of each phase formed by the same element wire as the coil 30, the input / output terminal 60 connected to the connection coil 50, the connection end 56 of the connection coil 50 and the coil 30. And a crimp terminal 62 for crimping and connecting the lead 32.

FIG. 2 is a plan view showing a surface of the insulator 42 on which the groove 44 is formed, and FIG.
2 is a sectional view showing one section. Insulator 42
As shown in the figure, four grooves 44 are formed in parallel in the radial direction, and holding claws 46 for preventing the connection coil 50 from coming out are formed in each of the grooves 44. The inner peripheral side of the insulator 42 is a tapered portion 4 having a slope.
8 so as to match the inclination formed on the holding portion 25 of the insulator 42 of the case 24. As a result, the insulator 42 is
Is attached to the holding part 25 without so-called play.

FIG. 4 is an explanatory view showing a state in which the connection coil 50 is attached to each groove 44 of the insulator 42, FIG. 5 is an explanatory view showing a connection state of the connection coil 50, and FIG. It is explanatory drawing which shows typically the connection state of 12 coils 30 by 50. In the figure, U1 to U
4 is a U-phase coil, V1 to V4 are V-phase coils, W1 to
W4 indicates a W-phase coil. Symbols A and B after U1 indicating coils such as U1A and U1B indicate winding ends of the coils. As shown in FIG. 5, the connection coil 50 is connected to the input / output terminal 60 for each phase and is connected to the lead 32 of the coil 30.
V, 52W, coil connecting coils 53U, 53V, 53W for connecting the coils 30 for each phase, and an inter-phase connecting coil 54 for connecting the inter-phase coils, and four grooves formed in the insulator 42. 44 without intersecting. As shown in FIGS. 4 and 5, the input / output terminals 60 of the input / output terminal coils 52U, 52V, and 52W.
The ends 55U, 55V, and 55W connected to the input / output terminal 60 are uniformly arranged at 120 degrees on the inner peripheral side and connected to the input / output terminal 60, and the input / output terminal coils 52U, 52V, and 5W.
2W, coil connection coils 53U, 53V, 53W, end 56 connected to coil 30 of interphase connection coil 54
U, 56V, and 56W are equally arranged on the outer peripheral side at 15 degrees, and are configured by crimping terminals 62 so that two rows each having two phases connected in series as shown in the schematic diagram of FIG. To the leads 32 of the coil 30.

According to the concentrated winding motor 20 of the embodiment described above, the insulators 42 are connected without intersecting the connection coils 50 for connecting two rows of 12 coils 30 connected in series for each phase. In the four grooves 44. As a result, the size of the concentrated winding motor 20 can be reduced. Further, a tapered portion 4 matching the inclination of the holding portion 25 of the case 24 is formed on the inner peripheral side of the insulator 42.
Since the insulator 8 is formed, the insulator 42 can be held without causing so-called play. Furthermore, by arranging the input / output terminals 60 of each phase of the connection coil 50 uniformly on the inner peripheral side at an angle of 120 degrees, the concentrated winding motor 20 can be well-balanced. This is particularly preferable when the motor is configured as a type in which the stator 28 rotates. In addition, since the ends 56U, 56V, 56W of the connection coil 50 are evenly arranged on the outer peripheral side and connected using the lead 32 of the coil 30 and the crimp terminal 62, the connection can be easily performed, and the concentrated winding motor 20
Can be improved.

In the concentrated winding motor 20 of the embodiment, the connection coil 50 is formed by the same element wire as the coil 30, but may be formed by a different element wire. In the concentrated winding motor 20 of the embodiment, the ends 56U, 56V, and 56W of the connection coil 50 and the leads 32 of the coil 30 are connected by the crimp terminals 62. However, the connection is performed without using the crimp terminals 62. It does not matter. Furthermore, in the concentrated winding motor 20 of the embodiment, the tapered portion 48 is formed on the inner peripheral surface of the insulator 42, but the tapered portion 48 may not be formed. Alternatively, in the concentrated winding motor 20 of the embodiment, the holding claws 46 for holding the connection coils 50 are formed in the respective grooves 44 of the insulator 42, but the holding claws 46 are not formed when the holding by the grooves 44 is sufficient. It may be.

In the concentrated winding motor 20 of the embodiment, the insulator 42 is formed in an annular shape and the four grooves 44 are formed in parallel in the radial direction. However, the insulator is formed in a short tubular shape, and the four grooves are formed in parallel on the outer peripheral surface. It may be formed. FIG. 7 shows a concentrated winding motor 20 provided with a modified insulator 42B.
2 shows a partial cross section of B. As shown in the figure, four grooves 44B are formed on the outer peripheral surface of the short tubular insulator 42B, and the connection coil 50 is arranged and the coil 30 is connected similarly to the concentrated winding motor 20 of the embodiment. . Whether the insulator is formed in a short tube or an annular shape as in the concentrated winding motor 20 of the embodiment may be arbitrarily determined according to design matters.

In the concentrated winding motor 20 of the embodiment, the end portions 55 of the input / output terminal coils 52U, 52V, 52W of each phase.
Although U, 55V, and 55W are uniformly arranged on the inner peripheral side at an angle of 120 degrees, they may be arranged at one position on the outer peripheral side as shown in the connection state diagram of the modification illustrated in FIG. In this case, connection between the three-phase input / output terminals and an external power line can be easily performed.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the gist of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing the configuration of a concentrated winding motor 20 according to an embodiment of the present invention.

FIG. 2 is a plan view showing a surface on which a groove 44 of the insulator 42 is formed.

FIG. 3 is a sectional view showing one section of the insulator 42;

FIG. 4 is an explanatory view showing a state in which a connection coil 50 is attached to each groove 44 of the insulator 42.

5 is an explanatory diagram showing a connection state of a connection coil 50. FIG.

FIG. 6 is an explanatory diagram schematically showing a connection state of twelve coils 30 by a connection coil 50;

FIG. 7 is a configuration diagram illustrating a partial configuration of a concentrated winding motor 20B including an insulator 42B according to a modified example.

FIG. 8 is an explanatory diagram showing a modification of the connection state of the connection coil 50.

[Explanation of symbols]

20, 20B concentrated winding motor, 22 rotating shafts, 24 cases, 25 holders, 26 rotors, 28 stators,
30 coils, 32 leads, 40 connections, 42, 4
2B insulator, 44, 44B groove, 46 holding claw, 48 taper portion, 50 connection coil, 52U, 5
2V, 52W I / O terminal coil, 53U, 53V,
53W coil connection coil, 54 phase connection coil,
55U, 55V, 55W, 56U, 56V, 56W end, 60 input / output terminals, 62 crimp terminals, U1 to U4
U-phase coil, V1-V4 V-phase coil, W1-W4 W
Phase coil.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H603 AA09 BB01 BB09 BB12 CA01 CA05 CB03 CB04 CB12 CB19 CB20 CC03 CC17 CE02 5H604 AA08 BB01 BB10 BB14 CC01 CC05 CC13 QA08 QB03 QB14 QB16 5H621 BB10 GB14 JK07

Claims (11)

[Claims] 1. A concentrated winding motor in which a plurality of coils attached to a stator core are connected in series and connected in parallel to each other and connected in each phase, wherein the motor is arranged at an attachment end of the plurality of coils attached to the stator core. An annular member having a plurality of parallel annular grooves, mounted in the plurality of grooves of the annular member, connected to some of the plurality of coils for each phase, and connected to input / output terminals; An input / output connection coil, a coil mounted in the plurality of grooves of the annular member, and a coil connected to the input / output connection coil of the plurality of coils for each phase and not connected to the input / output connection coil A concentrated winding motor including a coil connection coil for connecting a coil. 2. The concentrated winding motor according to claim 1, wherein connection portions of the input / output connection coil and the coil connection coil are evenly arranged on an outer peripheral side of the annular member. 3. A connection part between the input / output connection coil and the coil connection coil is connected by a crimp terminal for connecting the plurality of coils by crimping.
Or the concentrated winding motor according to 2. 4. The concentrated winding motor according to claim 1, wherein the input / output terminals are arranged such that respective phases are evenly arranged on an inner peripheral side of the annular member. 5. The concentrated winding motor according to claim 1, wherein the input / output terminals are arranged such that respective phases are concentrated at one location on an outer peripheral side of the annular member. 6. The concentrated winding motor according to claim 1, wherein the annular member is formed in a short tubular shape, and the plurality of grooves are formed on an outer peripheral surface. 7. The concentrated winding motor according to claim 1, wherein the annular member is formed in an annular shape, and the plurality of grooves are formed in a radial direction. 8. The concentrated winding motor according to claim 7, wherein an outer peripheral portion of the annular member is formed as a tapered portion having a predetermined angle, and an annular member holding that can be aligned with the outer peripheral portion of the annular member. A concentrated winding motor including a case in which a part is formed. 9. The coil holding section for holding the input / output connection coil and the coil connection coil when the input / output connection coil and the coil connection coil are mounted in the plurality of grooves. The concentrated winding motor according to any one of claims 1 to 8, further comprising: 10. The coil according to claim 1, wherein the input / output connection coil and the coil connection coil are formed by wires having substantially the same cross-sectional shape as the wires forming the plurality of coils. Concentrated winding motor. 11. The three-phase concentrated winding motor according to claim 1, wherein two rows each formed by connecting two coils in series are connected in parallel, and said annular member has four grooves. The input / output connection coil is connected to two coils at a position of 60 degrees for each phase, and the coil connection coil is connected to the input / output connection coil for each phase. A concentrated winding motor, which is two coils for connecting the connected coil and the coil that is not connected to the input / output connection coil at a position of 60 degrees.