JPH06261510A - Reluctance motor - Google Patents

Abstract

PURPOSE:To remarkably improve the operating efficiency of a reluctance motor by efficiently dissipate the heat generated by an inductor or armature so that the operating limit of the motor due to heat can be raised. CONSTITUTION:Pluralities of spiral projections 20A-20B and 6a-6c' are respectively formed on an inductor 21 and armatures 7a-7c' sides and, by rotationally driving the inductor 21 by exciting the armatures 7a-7c' sides, the air in the gaps between the inductor 21 and armatures 7a-7c' is actively moved in the thrusting direction of a rotating shaft 4 and the inductor 21 and armatures 7a-7c' are cooled with the air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reluctance motor used in an electric vehicle or the like, and more particularly to a reluctance motor capable of efficiently removing heat generated by iron loss, copper loss, etc. generated in the motor.

[0002]

2. Description of the Related Art As a reluctance motor used in an electric vehicle or the like, the one shown in FIG. 16 is conventionally known.

Reluctance motor 101 shown in this figure
Is a fixing portion 10 fixed to a chassis of an electric vehicle or the like.
2 and a rotating portion 103 rotatably arranged in the fixed portion 102, and the rotating portion 103 is rotated by a rotating magnetic field generated by the fixed portion 102.

The fixed portion 102 has a cylindrical motor case 105 and a motor case 105 as shown in FIG.
Six linear projections 106a to 106c 'which are integrally formed on the inner peripheral surface in the axial direction and at equal intervals,
Six coils 108 that are respectively wound around these linear protrusions 106a to 106c 'to form armatures 107a to 107c', heat dissipation fins 109 attached to the outer peripheral surface of the motor case 105, and one end side of the motor case 105 A ball-shaped bearing 110 composed of a cup-shaped cover 110 for closing the housing, a circumferential groove 111 formed in the central portion of the cover 110, and a plurality of balls 112 movably fitted in the circumferential groove 111, and a motor case A ball bearing configured by a cup-shaped cover 114 that closes the other end side of 105, a peripheral groove 115 formed in the central portion of the cover 114, and a plurality of balls 116 movably fitted in the peripheral groove 115. And 117.

While the rotating portion 103 is rotatably supported by the ball bearings 113 and 117, when a plurality of phases of alternating current are supplied, a magnetic field is generated by each coil 108 and each linear protrusion 106a to 106c '. Is excited to generate a rotating magnetic field, and the rotating unit 103 is rotated.

The rotating portion 103 includes ball bearings 113, 1
A rotary shaft 104 having circumferential grooves 120 and 121 formed in a portion corresponding to 17 and four linear protrusions 12 as shown in FIG.
2A to 122B ′, and an inductor 123 fixed to the rotating shaft 104 so as to be axially symmetrical, and the peripheral grooves 120 and 12 are supported by the ball bearings 113 and 117, respectively. The movement of the shaft 104 in the thrust direction is prohibited, and the armatures 107a to 10a-10a are supported while being rotatably supported about the rotating shaft 104.
When the rotating magnetic field is generated by 7c ', the linear protrusions 122A to 122B' convert the linear protrusions 106a to
The linear projection 1 which is attracted to 106c 'and also attracts these linear projections 122A to 122B'.
06a to 106c 'are sequentially switched, and the rotary shaft 104
Rotate around.

[0007]

However, the above-mentioned conventional reluctance motor 101 has the following problems.

That is, the reluctance motor 101 is
When driven, heat is generated due to iron loss and copper loss, and the temperature of the inductor 123 and each of the armatures 107a to 107c 'rises, and this temperature rise limits the motor output.

Therefore, the conventional reluctance motor 10
In No. 1, the heat generated in each armature 107a to 107c 'is transmitted to the heat radiation fin 109 via the motor case 105 and released to the atmosphere, and the heat generated in the inductor 123 is rotated. , 117 to the cover 110, 114 to escape to the atmosphere,
The air in the gap between the inductor 123 and each of the armatures 107a to 107c 'is released into the atmosphere through the medium.

However, in such a method, there is a problem that the operating limit due to heat becomes low because the cooling efficiency is poor.

In view of the above circumstances, the present invention can efficiently dissipate the heat generated in the inductor and the armature, thereby increasing the operation limit due to heat and greatly improving the operation efficiency of the motor. The purpose is to provide a reluctance motor that can be used.

[0012]

In order to achieve the above-mentioned object, the present invention forms a plurality of protrusions on the side of a stator and constructs an armature by inserting a coil into each of these protrusions, In a reluctance motor in which a number of protrusions corresponding to the respective protrusions are formed on the outer peripheral surface of the reluctance member on the child side, the shape of the protrusions forming the armature is made spiral, and the shape of the protrusion on the rotor side is changed. It is characterized by making it spiral.

[0013]

In the above structure, a plurality of spiral projections are formed on the rotor side and a plurality of spiral projections are formed on the stator side, and the stator side is excited to rotate the rotor. At this time, the air present in the gap between the rotor and the stator is positively moved in the thrust direction of the rotary shaft by each spiral protrusion provided on the rotor side, and the rotor and the stator are air-cooled.

[0014]

1 is a partially cut sectional view showing a first embodiment of a reluctance motor according to the present invention.

The reluctance motor 1a shown in FIG.
The stationary unit 2 is fixed to a chassis of an electric vehicle, and the rotating unit 3 is rotatably arranged in the stationary unit 2. The rotating unit 3 is rotated by a rotating magnetic field generated by the stationary unit 2. At the same time, the rotating portion 3 generates a rightward wind to forcibly cool the insides of the rotating portion 3 and the fixed portion 2.

The fixing portion 2 is formed in a cylindrical shape with a motor case 5 as shown in FIG. 2, and is integrally formed on the inner peripheral surface of the motor case 5 in the axially extending direction at equal intervals. Spiral protrusions 6a to 6c 'and these spiral protrusions 6a
6c 'and 6 coils 8 respectively wound around armatures 7a to 7c', radiating fins 9 attached to the outer peripheral surface of the motor case 8, and a cup-shaped cover closing one end side of the motor case 5. 10, a ball bearing 13 constituted by a circumferential groove 11 formed in the central portion of the cover 10 and a plurality of balls 12 movably fitted in the circumferential groove 11, and the other end side of the motor case 5 The ball bearing 17 includes a closed cup-shaped cover 14, a peripheral groove 15 formed in a central portion of the cover 14, and a plurality of balls 16 movably fitted in the peripheral groove 15. .

While the rotating portion 3 is rotatably supported by the ball bearings 13 and 17, when a plurality of alternating currents are supplied, a magnetic field is generated by each coil 8.
The spiral protrusions 6a to 6c 'are excited to generate a rotating magnetic field, and the rotating unit 3 is rotated.

The rotating portion 3 includes a rotating shaft 4 having circumferential grooves 18 and 19 formed in portions corresponding to the ball bearings 13 and 17, respectively.
As shown in FIG. 2, the inductor 2 has four spiral protrusions 20A to 20B 'and is fixed to the rotating shaft 4 so as to be axially symmetrical.
1 and the peripheral grooves 18, 19 are supported by the ball bearings 13, 17, respectively, whereby movement of the rotary shaft 4 in the thrust direction is prohibited, and the rotary shaft 4
While being rotatably supported around the armature,
When the rotating magnetic field is generated by 7c ', the spiral protrusions 20A to 20B' are attracted to the spiral protrusions 6a to 6c 'and the spiral protrusion 6a to be attracted.
6c 'are sequentially switched to rotate about the rotating shaft 4.

In this case, the armatures 7a to 7a as shown in FIG.
The shape of each of the spiral protrusions 6a to 6c 'on the c'side and the inductor 2
The shapes of the spiral protrusions 20A to 20B 'on the first side are the same, and the spiral protrusions 6a on the armatures 7a to 7c' side are the same.
~ 6c 'each end and each spiral projection 20 on the side of the inductor 21.
Each end of A to 20B 'matches, and further, armature 7a to
The inductor 2 is attached to each of the spiral protrusions 6a to 6c 'on the 7c' side.
The spiral protrusions 6A to 6c 'on the armatures 7a to 7c' side and the spiral protrusions 20A on the inductor 21 side so that the spiral protrusions 20A to 20B 'on the first side have a ratio of 4 to 3. ~
The shape and positional relationship with 20B 'are set.

Then, among the spiral protrusions 6a to 6c 'on the armatures 7a to 7c' side, magnetic fields are generated in the spiral protrusions facing each other, and these are sequentially switched to generate a rotating magnetic field to generate an inductor. The inductor 21 is moved upward in FIG. 3 by sequentially attracting the spiral protrusions 20A to 20B ′ on the 21st side.

Accordingly, in FIG. 2, the inductor 21 and the armature 7a are formed by the spiral protrusions 20A to 20B 'on the side of the inductor 21 which are formed by rotating the inductor 21 clockwise and twisting it to the right.
The air present in the gaps to 7c 'is moved to the right in FIG. 1 to air-cool the inductor 21 and the armatures 7a to 7c'.

When the reluctance motor 1a is rotationally driven in the opposite direction, the air blowing direction is also reversed, but the inductor 21 and the armatures 7a to 7c 'are similarly air-cooled.

As described above, in this embodiment, the plurality of spiral projections 20A to 20B 'are formed on the side of the inductor 21 and the plurality of spiral projections 6a to 6c' are also formed on the side of the armatures 7a to 7c '. When the inductor 21 is formed and the inductor 21 is rotationally driven by exciting the armatures 7a to 7c ′ side, the inductor 21 and the armatures 7a to 7c are formed by the spiral protrusions 20A to 20B ′ provided on the inductor 21 side. Since the air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotary shaft 4 to cool the inductor 21 and the armatures 7a to 7c'. It is possible to efficiently dissipate the heat generated in the motor, thereby increasing the operating limit due to the heat and significantly improving the operating efficiency of the motor.

FIG. 4 is a partially cut sectional view showing a second embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1b shown in this figure differs from the reluctance motor 1a shown in FIG. 1 in that the inductor 21 side is moved to the left, whereby each of the armatures 7a to 7c 'side is moved as shown in FIG. That is, the spiral protrusions 20A to 20B 'on the side of the inductor 21 are shifted to the left side with respect to the spiral protrusions 6a to 6c'.

As a result, the armatures 7a to 7c 'are excited to rotate the inductor 21, and the spiral protrusions 20A to 20B' provided on the inductor 21 side cause the inductor 21 to rotate.
When the air in the gap between the armatures 7a to 7c 'is positively moved in the thrust direction of the rotary shaft 4, the inductor 21 is biased to the left by this reaction force.
The inductor 2 is attached to each of the spiral protrusions 6a to 6c 'on the 7c' side.
Since the spiral protrusions 20A to 20B 'on the first side are shifted to the left side, the spiral protrusions 6 on the armatures 7a to 7c' side are formed.
The direction in which the centers of the spiral protrusions 6a to 6c 'on the armature 7a to 7c' side and the centers of the spiral protrusions 20A to 20B 'on the inductor 21 side are aligned with each other by a to 6c' (right in FIG. 4). Direction) to each of the spiral protrusions 20A to 2 on the side of the inductor 21.
Since 0B 'can be pulled in, it is possible to cancel each of these forces and prevent an excessive thrust force from being applied to the rotating shaft 4.

As described above, in this embodiment, like the above-described first embodiment, when the armatures 7a to 7c 'are excited and the inductor 21 is rotationally driven, it is provided on the inductor 21 side. The respective spiral projections 20A to 20B 'positively move the air in the gap between the inductor 21 and the armatures 7a to 7c' in the thrust direction of the rotary shaft 4 to positively move the inductor 21 and the armatures 7a to 7c '. Since it is air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c 'can be efficiently dissipated, thereby increasing the operation limit due to heat and greatly improving the operation efficiency of the motor. be able to.

Further, in the second embodiment, the spiral projections 6a to 6c 'on the armature 7a to 7c' side are more
When the spiral protrusions 20A to 20B ′ on the side of the inductor 21 are shifted to the left side and the reluctance motor 1b is operated at the rated value, the thrust force in the left direction applied to the inductor 21 and
Since the thrust force in the right direction is canceled out, it is possible to prevent the ball bearings 13 and 17 supporting the rotary shaft 4 from being applied with an excessive thrust force. The mechanical wear of the can be reduced.

FIG. 6 is a partially cut sectional view showing a third embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1c shown in this figure differs from the reluctance motor 1a shown in FIG. 1 in that the right side of each of the spiral projections 6a to 6c 'of the armatures 7a to 7c' is lengthened, thereby making it shown in FIG. Thus, the right side of each of the spiral protrusions 6a to 6c 'on the side of the armatures 7a to 7c' is made to squeeze out from each of the spiral protrusions 20A to 20B 'on the side of the inductor 21.

As a result, the armatures 7a to 7c 'are excited to rotationally drive the inductor 21, and the spiral protrusions 20A to 20B' provided on the inductor 21 side cause the inductor 21 to rotate.
When the air in the gap between the armatures 7a to 7c 'is positively moved in the thrust direction of the rotary shaft 4, the inductor 21 is urged to the left by this reaction force. For each of the spiral protrusions 20A to 20B ′ of
Since the right side of each spiral projection 6a to 6c 'on the 7c' side is pushed out, each spiral projection 6a on the armature 7a to 7c 'side is pushed out.
6c ', the center of each spiral projection 6a to 6c' on the armature 7a to 7c 'side and each spiral projection 2 on the inductor 21 side.
The spiral projections 20A to 20A on the side of the inductor 21 in the direction in which the centers of 0A to 20B 'coincide (rightward in FIG. 6).
Since B ′ can be pulled in, it is possible to cancel each of these forces and prevent an excessive thrust force from being applied to the rotating shaft 4.

As described above, in this embodiment, as in the first and second embodiments described above, when the armatures 7a to 7c 'are excited and the inductor 21 is rotationally driven, this inductor 2
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotating shaft 4 by the spiral protrusions 20A to 20B' provided on the first side, and the inductor 21 and the electric machine Since the children 7a to 7c 'are air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c' can be efficiently dissipated, whereby the operating limit due to the heat is increased and the operating efficiency of the motor is increased. Can be significantly improved.

Further, in the third embodiment, the right side of each spiral projection 6a-6c 'on the armature 7a-7c' side is pushed out with respect to each spiral projection 20A-20B 'on the inductor 21 side. When the reluctance motor 1c is operated at the rated value, the thrust force in the left direction applied to the inductor 21 and
Since the thrust force in the right direction is canceled out, it is possible to prevent the ball bearings 13 and 17 supporting the rotary shaft 4 from being applied with an excessive thrust force. The mechanical wear of the can be reduced.

FIG. 8 is a partially cut sectional view showing a fourth embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1d shown in this figure differs from the reluctance motor 1a shown in FIG. 1 in that the left side of each spiral projection 20A to 20B 'of the inductor 21 is lengthened,
As a result, as shown in FIG. 9, the left side of the spiral protrusions 20A to 20B 'on the side of the inductor 21 is made to squeeze out from the spiral protrusions 6a to 6c' on the side of the armature 7a to 7c '. is there.

As a result, the armatures 7a to 7c 'are excited to rotationally drive the inductor 21, and the spiral protrusions 20A to 20B' provided on the inductor 21 side cause the inductor 21 to rotate.
When the air in the gap between the armatures 7a to 7c 'is positively moved in the thrust direction of the rotary shaft 4, the inductor 21 is biased to the left by this reaction force.
The inductor 7 is attached to each of the spiral protrusions 6a to 6c 'on the 7c' side.
Since the left side of the spiral protrusions 20A to 20B 'on the a to 7c' side is pushed out, the spiral protrusions 6a to 6c 'on the armatures 7a to 7c' side cause the spirals on the armatures 7a to 7c 'side. Spiral protrusions 20 on the side of the inductor 21 in a direction in which the centers of the protrusions 6a to 6c 'and the centers of the spiral protrusions 20A to 20B' on the side of the inductor 21 coincide (rightward in FIG. 8).
Since A to 20B 'are pulled in, it is possible to cancel each of these forces so that the rotary shaft 4 is not subjected to an excessive thrust force.

Thus, in this embodiment, as in the first to third embodiments described above, when the armatures 7a to 7c 'are excited and the inductor 21 is rotationally driven, this inductor 2
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotating shaft 4 by the spiral protrusions 20A to 20B' provided on the first side, and the inductor 21 and the electric machine Since the children 7a to 7c 'are air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c' can be efficiently dissipated, whereby the operating limit due to the heat is increased and the operating efficiency of the motor is increased. Can be significantly improved.

Furthermore, in the fourth embodiment, for each of the spiral projections 6a-6c 'on the armature 7a-7c' side,
When the left side of each spiral projection 20A to 20B 'on the side of the inductor 21 is pushed out and the reluctance motor 1d is operated at the rated value, the thrust force in the left direction applied to the inductor 21, and
Since the thrust force in the right direction is canceled out, it is possible to prevent the ball bearings 13 and 17 supporting the rotary shaft 4 from being applied with an excessive thrust force. The mechanical wear of the can be reduced.

FIG. 10 is a partially cut sectional view showing a fifth embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1e shown in this figure differs from the reluctance motor 1a shown in FIG. 1 in that each of the spiral projections 6a to 7c 'provided on the armatures 7a to 7c' side.
A protrusion 25 extending in the direction of the rotation axis 4 is added to each of the spiral protrusions 6a to 6c 'on the right side of 6c' so as to surround each of the protrusions 25 and the spiral protrusions 6a to 6c '. That is, the coil 8 is wound to form the armatures 7a to 7c '.

As a result, the armatures 7a to 7c 'are excited to rotationally drive the inductor 21, and the spiral protrusions 20A to 20B' provided on the inductor 21 side cause the inductor 21 and the armature 7a to rotate. When the air present in the gap between 7c ′ and 7c ′ is positively moved in the thrust direction of the rotary shaft 4, the inductor 21 is urged to the left by this reaction force.
Each of the spiral protrusions 6a to 6 provided on the a to 7c 'side
On the right side of c ′, for each of these spiral protrusions 6a to 6c ′,
Since the projections 25 extending in the direction of the rotating shaft 4 are added, the inductors 21 are pulled in the right direction by the respective projections 25 to cancel out these respective forces, and an excessive thrust force is not applied to the rotating shaft 4. You can

As described above, in this embodiment, as in the above-described first to fourth embodiments, when the armatures 7a to 7c 'are excited and the inductor 21 is rotationally driven, this inductor 2
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotating shaft 4 by the spiral protrusions 20A to 20B' provided on the first side, and the inductor 21 and the electric machine Since the children 7a to 7c 'are air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c' can be efficiently dissipated, whereby the operating limit due to the heat is increased and the operating efficiency of the motor is increased. Can be significantly improved.

Further, in the fifth embodiment, the spiral projections 6a to 6c 'are arranged on the right side of the spiral projections 6a to 6c'.
When the reluctance motor 1e is operated at the rated speed by adding the projection 25 extending in the direction of the rotating shaft 4 for each of a to 6c ', the left thrust force and the right thrust force applied to the inductor 21 are offset. Therefore, it is possible to prevent the ball bearings 13 and 17 supporting the rotary shaft 4 from being applied with an excessive thrust force, thereby reducing the mechanical wear of the ball bearings 13 and 17, etc. be able to.

Further, usually, the electric wire is wound around a specific mold in advance to form the coil of the armature, and the coil is fitted into the protrusion of the armature later. Therefore, as in the conventional reluctance motor 101 shown in FIG. Protrusions 106a to 106
If it is c ′, the coil 108 is moved from the inside of the motor case 105 to the linear protrusions 106 of the armatures 107a to 107c ′.
It is easy to fit in the a-106c ′, but in the reluctance motor 1a shown in FIG.
Since the spiral protrusions 6a to 6c 'are formed as the protrusions, the coil 8 itself has flexibility or the outside of the motor case 5 in order to fit the coil 8 into the spiral protrusions 6a to 6c'. It is necessary to have a specific projection shape that allows the coil 5 created in step 3 to be inserted.

On the other hand, in the reluctance motor 1e of the fifth embodiment, since the right end of the coil 8 is bent toward the center of the rotary shaft 4, the curvatures of the spiral projections 6a to 6c 'are made constant. If it does, even if it makes one revolution in the direction of rotation, from the left side of FIG.
Simply by inserting the coil 8 into the a to 6c ', the coil 8 is attached to the spiral projections 6a to 6c' and the spiral projections 6a to 6c.
The coil 8 can be fitted in the protrusion 25 connected to c ′.

FIG. 11 is a partially cut sectional view showing a sixth embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1f shown in this figure is different from the reluctance motor 1a shown in FIG. 1 in that the circumferential grooves 11, 19 of the rotary shaft 4 abutting the balls 12, 16 of the ball bearings 13, 17 are thrust in the thrust direction. As shown in FIG. 12, the gear 29 that meshes with the gear 28 driven by the rotary shaft 4 is lengthened in the thrust direction so that each gear 2 can be moved even if the rotary shaft 4 moves in the thrust direction.
8 and 29 are designed to maintain the meshing relationship.

As a result, the armatures 7a to 7c 'are excited to rotationally drive the inductor 21, and the spiral projections 20A to 20B' provided on the inductor 21 side cause the inductor 21 and the armature 7a to rotate. When the air present in the gap between 7c 'and 7c' is positively moved in the thrust direction of the rotating shaft 4, the inductor 21 is biased leftward by this reaction force. Rotating shaft 4 with which 12 and 16 contact
The circumferential grooves 18 and 19 of the are lengthened in the thrust direction,
The gear 29 meshed with the gear 28 driven by the rotary shaft 4 is elongated in the thrust direction so that the gears 28 and 29 maintain the meshing relationship even if the rotary shaft 4 moves in the thrust direction. Therefore, even if the inductor 21 moves leftward and the rotating shaft 4 slides leftward correspondingly, the meshing relationship between the gears 28 and 29 can be maintained.

Further, the inductor 21 is moved to the left to some extent,
When thrust, the spiral protrusions 6a to 6c 'on the armatures 7a to 7c' side cause the centers of the spiral protrusions 6a to 6c 'on the armature 7a to 7c' side and the spiral protrusions on the inductor 21 side. The direction in which the centers of 20A to 20B 'are aligned with each other (see FIG.
1 to the right), each spiral protrusion 20 on the side of the inductor 21.
Since A to 20B 'can be pulled in, these forces can be canceled out to maintain the position of the rotating shaft 4 at a constant position.

As described above, in this embodiment, as in the above-described first to fifth embodiments, when the inductor 21 is rotationally driven by exciting the armatures 7a to 7c 'side, the inductor 2
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotating shaft 4 by the spiral protrusions 20A to 20B' provided on the first side, and the inductor 21 and the electric machine Since the children 7a to 7c 'are air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c' can be efficiently dissipated, whereby the operating limit due to the heat is increased and the operating efficiency of the motor is increased. Can be significantly improved.

Further, in the sixth embodiment, the circumferential grooves 18, 19 of the rotary shaft 4 which come into contact with the balls 12, 16 of the ball bearings 13, 17 are lengthened in the thrust direction and driven by the rotary shaft 4. The gear 29 that meshes with the gear 28 is lengthened in the thrust direction so that the gears 28 and 29 maintain the meshing relationship even when the rotary shaft 4 moves in the thrust direction, and the inductor 21 moves leftward. When moved to some extent, each spiral protrusion 6a on the armature 7a to 7c 'side
6c ', the center of each spiral projection 6a to 6c' on the armature 7a to 7c 'side and each spiral projection 2 on the inductor 21 side.
Each spiral protrusion 20A-2 on the side of the inductor 21 in the direction (rightward in FIG. 11) that matches the center of 0A-20B '.
Since 0B 'can be pulled in, the reluctance motor 1f is rotated by balancing the leftward thrust force and the rightward thrust force applied to the rotating shaft 4 from the time when the revolution speed is substantially zero to the rated revolution speed. It is possible to prevent an excessive thrust force from being applied to the ball bearings 13 and 17 supporting the shaft 4, and thus the ball bearing 1
It is possible to reduce mechanical wear of the parts 3 and 17 and to facilitate the design of the reluctance motor 1f.

Further, in the above-mentioned first to fifth embodiments,
When the reluctance motors 1a to 1e are rotated in reverse, only the right thrust force is applied to the inductor 21,
Although the reluctance motors 1a to 1e cannot be rotationally driven in one direction, in the sixth embodiment, no matter which direction the reluctance motor 1f is rotated, the left and right thrust forces applied to the inductor 21 are generated. Since they can be balanced, they can be rotationally driven in the forward direction and the reverse direction.

FIG. 13 is a partially cut sectional view showing a seventh embodiment of the reluctance motor according to the present invention. In this figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The reluctance motor 1g shown in this figure differs from the reluctance motor 1a shown in FIG. 1 in that the spiral projections 20A to 20B 'formed on the inductor 21 have a "doglegged" shape. Corresponding to this, the spiral projection 6a formed on the armatures 7a to 7c 'as shown in FIG.
This means that the shape of ~ 6c 'is made to be a "dogleg".

As a result, when the armatures 7a to 7c 'are excited and the inductor 21 is rotationally driven, the inductor 21
"U-shaped" spiral protrusions 20A to 20 provided on the side
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is removed by B'as shown in FIG.
Peripheral part of the inductor 21-> Peripheral part of the armatures 7a to 7c '-> Central part of the armatures 7a to 7c'-> Actively circulate in the path of the central part of the inductor 21 and at this time, The applied thrust force in the right direction and the thrust force in the left direction are made equal to cancel the left and right thrust forces with respect to the rotary shaft 4 so that the position of the rotary shaft 4 can be kept constant.

As described above, in this embodiment, as in the above-described first to sixth embodiments, when the inductor 21 is rotationally driven by exciting the armatures 7a to 7c 'side, the inductor 2
The air in the gap between the inductor 21 and the armatures 7a to 7c 'is positively moved in the thrust direction of the rotating shaft 4 by the spiral protrusions 20A to 20B' provided on the first side, and the inductor 21 and the electric machine Since the children 7a to 7c 'are air-cooled, the heat generated in the inductor 21 and the armatures 7a to 7c' can be efficiently dissipated, thereby increasing the operating limit due to the heat and operating efficiency of the motor. Can be significantly improved.

In addition, in the seventh embodiment, the "dogleg" spiral projections 20A-2 provided on the inductor 21 side.
The air present in the gap between the inductor 21 and the armatures 7a to 7c 'by the 0B' is the central part of the inductor 21-> the peripheral part of the inductor 21-> the peripheral part of the armatures 7a to 7c '-> the armatures 7a to 7c.
At the same time, the armatures 7a to 7c 'are positively circulated along the path from the central portion of c'to the central portion of the inductor 21.
The rightward thrust force and the leftward thrust force applied to the rotation shaft 4 are made equal to cancel the left and right thrust forces with respect to the rotation shaft 4 to keep the position of the rotation shaft 4 constant. It is possible to reduce mechanical wear of the ball bearings 13 and 17 by not applying an excessive force.

In the above-described first to seventh embodiments, the motor case 5 is integrally formed with the spiral protrusions 6a to 6c 'of the armatures 7a to 7c'.
5, the motor case 5 and the spiral protrusions 6a to 6c 'of the armatures 7a to 7c' are separately formed, and then the spiral protrusions 6a to 6c 'are applied to the inner peripheral surface of the motor case 5. They may be brought into contact with each other and integrated with each other by bolts (or pins) 30 from the outside of the motor case 5.

By doing so, the spiral protrusion 2 having any shape, for example, one rotation in the axial direction, can be obtained.
It can be manufactured with 0A to 20B '.

Further, in each of the above-described embodiments, the armatures 7a to 7c 'and the inductor 21 are arranged in the sealed space formed by the one motor case 5 and the two covers 10 and 14. Although the present invention has been described by taking a closed type reluctance motor as an example, other types of reluctance motors, for example, a space formed by one motor case 5 and two covers 10 and 14, and the outside are described. The present invention may be applied to an open type reluctance motor that communicates with each other through an air port or the like.

In this case, when the inductor 21 is rotated,
The air generated by the rotation sucks in new air from the outside of the reluctance motor, cools the armatures 7a to 7c 'and the inductor 21, and then discharges them out of the reluctance motor, so that the armatures 7a to 7c' and Inductor 21
The cooling efficiency of can be further improved.

[0062]

As described above, according to the present invention, the heat generated in the inductor and the armature can be efficiently dissipated, whereby the operation limit due to heat is increased and the operation efficiency of the motor is greatly increased. Can be improved.

[Brief description of drawings]

FIG. 1 is a partially cut sectional view showing a first embodiment of a reluctance motor according to the present invention.

FIG. 2 is a cross-sectional view of the reluctance motor shown in FIG. 1 taken along the plane AA.

FIG. 3 is a schematic diagram showing an example of a positional relationship between an armature-side spiral protrusion and an inductor-side spiral protrusion of the reluctance motor shown in FIG.

FIG. 4 is a partially cut sectional view showing a second embodiment of the reluctance motor according to the present invention.

5 is a schematic diagram showing an example of a positional relationship between an armature-side spiral protrusion and an inductor-side spiral protrusion of the reluctance motor shown in FIG.

FIG. 6 is a partially cut sectional view showing a third embodiment of the reluctance motor according to the present invention.

7 is a schematic diagram showing an example of a positional relationship between an armature-side spiral protrusion and an inductor-side spiral protrusion of the reluctance motor shown in FIG.

FIG. 8 is a partially cut sectional view showing a fourth embodiment of a reluctance motor according to the present invention.

9 is a schematic diagram showing an example of the positional relationship between the armature-side spiral protrusion and the inductor-side spiral protrusion of the reluctance motor shown in FIG.

FIG. 10 is a partially cut sectional view showing a fifth embodiment of the reluctance motor according to the present invention.

FIG. 11 is a partially cut sectional view showing a sixth embodiment of the reluctance motor according to the present invention.

12 is a front view showing an example of a tooth engagement relationship of each gear shown in FIG.

FIG. 13 is a partially cut sectional view showing a seventh embodiment of the reluctance motor according to the present invention.

14 is a schematic diagram showing an example of a positional relationship between an armature-side spiral protrusion and an inductor-side spiral protrusion of the reluctance motor shown in FIG.

FIG. 15 is a cross-sectional view showing a modified example of the reluctance motor according to the present invention.

FIG. 16 is a partially cut cross-sectional view showing an example of a reluctance motor that has been conventionally known as a motor of an electric vehicle.

17 is a cross-sectional view of the reluctance motor shown in FIG. 16 taken along the plane AA.

[Explanation of symbols]

 1a-1g Reluctance motor 2 Fixed part (stator) 3 Rotating part (rotor) 4 Rotating shaft 5 Motor case 6a-6c 'Spiral protrusion 7a-7c' Armature 8 Coil 9 Radiating fins 10, 14 Cover 11, 15 circumferential groove 12, 16 ball 13, 17 ball bearing 18, 19 circumferential groove 20A-20B 'spiral protrusion 21 inductor

Claims (1)

[Claims] 1. A plurality of protrusions are formed on the stator side, and a coil is inserted into each of these protrusions to form an armature, and a number corresponding to each of the protrusions is formed on the outer peripheral surface of the reluctance member on the rotor side. In the reluctance motor having the protrusions, the protrusions forming the armature and the rotor-side protrusions are each formed in a spiral shape.