JP2738614B2 - Reluctance type pulse motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reluctance pulse motor.

[0002]

2. Description of the Related Art FIG. 10 is a front view showing a conventional reluctance type pulse motor (also called a stepping motor).
In the figure, 1 is a ring-shaped stator core, 2a, 2b,
2c is a magnetic pole protruding from the inside of the stator core 1 in the radial direction, 3a, 3b, 3c is a coil wound around each magnetic pole 2a, 2b, 2c, 4 is a rotor, 5a, 5b, 5c, 5d is a rotor A magnetic pole protruding in the radial direction from the outside of 4 is a shaft to which the rotor 4 is fixed. The stator core 1 may be formed of a massive core, or may have a laminated structure in which a sheet-shaped magnetic material 30 is wound as shown in FIG.

Next, the operation will be described. In FIG. 10, the stator 1 has three pairs (six in total) of magnetic poles 2a, 2b, and 2c in the number of pole pairs, and faces the rotor 4 via a gap. Since the rotor 4 has four magnetic poles 5a to 5d, the magnetic poles 2a, 2b, and 2c of the stator 1 and the rotor 4 partially coincide with each other and the remaining magnetic poles do not coincide with each other. now,
When the magnetic pole 2a and the magnetic pole 5a face each other, the magnetic pole 2a
The rotor 4 does not move even when the coil 3a wound around the magnetic pole 2b is excited, but when the coil 3b wound around the magnetic pole 2b is excited, the magnetic pole 2b and the magnetic pole 5b are displaced from each other, so that the magnetic resistance is high.
A suction force acts to reduce this. Therefore, the magnetic pole 2
The rotor 4 moves to a position where b and 5b coincide (the position where the magnetic resistance is minimum). Next, when the coil 3c wound around the magnetic pole 2c is excited, the coil 3c rotates to a position where the magnetic pole 2c and the magnetic pole 5c coincide. By repeating this, smooth rotation of the rotor 4 can be obtained.

[0004]

The conventional reluctance type pulse motor is constructed as described above, so that the output density is low, and in order to increase the capacity, it is necessary to determine design specifications each time. There was a problem. In addition, when the mass is increased, there is a problem that a fan or the like for cooling the stator is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a reluctance type pulse motor device capable of easily increasing the output.

[0006]

According to the first aspect of the present invention, there is provided a reluctance type pulse motor comprising: a ring-shaped stator core;
A plurality of coils wound around the stator core, and
At one end of the stator core,
A plurality of first protrusions provided so as to protrude physically in the axial direction
A first stator consisting of:
The other end of the stator core opposite to the one side is
A second fixing provided with a plurality of protrusions similar to one protrusion
Child and supported by the shaft, and in one side
A plurality different from the number of the first protrusions by projecting in the axial direction.
A first rotor provided with several second protrusions,
In addition to one rotor, the surface on the opposite side to the one side
Provided with a plurality of third protrusions corresponding to the second protrusions
At least one stator and at least one
Reactor that selects one rotor and arranges them
The above-mentioned shaft is inserted in each stator.
And each rotor has at least a second projection
Are arranged so as to face the first protrusion of the stator via a space.
It was established .

According to a second aspect of the present invention, there is provided a reluctance type pulse motor, wherein one second stator is selected as a stator.
And select the two first rotors as rotors,
The first protrusions on both ends of the stator
The two projections are arranged to face each other.

According to a third aspect of the present invention, there is provided a reluctance type pulse motor in which a plurality of stators and a plurality of rotors are arranged in the axial direction.
2. The reluctance pulse motor according to claim 1, wherein the pulse motor is arranged.
The rotor sandwiched between the pair of stators has the second
Using a rotor and fixing it between a pair of rotors
The second stator is used as a child .

According to a fourth aspect of the present invention, there is provided a reluctance type pulse motor, wherein each rotor includes a plurality of axially penetrating motors .
An air hole is provided .

According to a fifth aspect of the present invention, there is provided a reluctance pulse motor having at least one of the stator core and the rotor.
One of them has a structure in which sheet-like magnetic materials are laminated .

[0011]

The output of the reluctance pulse motor according to the first aspect of the present invention can be easily increased by arranging a plurality of identical motors on a common shaft.

In the reluctance pulse motor according to the second aspect of the present invention, the protrusion of the rotor functions as a fan, and the air sucked from the air holes flows through the fan to cool the stator core.

The reluctance pulse motor according to the third aspect of the present invention can obtain a large output even with one set of motors.

The reluctance type pulse motor according to the fourth aspect of the present invention is convenient when a plurality of sets of motors are combined, and can be combined with a small and lightweight motor.

In the reluctance pulse motor according to the fifth aspect of the present invention, the attraction force can be increased by selecting a sheet-shaped magnetic material having a high relative magnetic permeability.

[0016]

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1, 2 and 3, 21
Is a stator, 22 is a ring-shaped stator core, 22a is a plurality of grooves provided on one end surface of the stator core 22, and 23 is a plurality of grooves wound around the groove 22a (in the case of a three-phase, usually 3 The coil 24 is a first protrusion provided between the grooves 22a of the stator core 22 and protruding in the axial direction, and is slightly longer in the axial direction than the length of the coil 23 in the axial direction. I have.

Numeral 25 denotes a disk-shaped rotor, which is a stator iron core 22.
Are coaxially opposed to one end face. Reference numeral 26 denotes a shaft for supporting the rotor 25, and reference numeral 27 denotes a protrusion as a second protrusion provided on the rotor 25 and protruding in the axial direction. The protrusion is opposed to the protrusion 24 of the stator core 22 via a gap 28. I have. The number of the projections 27 does not match the number of the projections 24 of the stator core 22.

FIG. 4 shows the protrusions 27 of the rotor 25 of FIG. 3 superimposed on the stator 21 of FIG.
23A to 23F, 24A
To 24F, and the four protrusions 27 are indicated by 27A to 27D.

Next, the operation will be described. 4, the stator 21 has three pairs (six in total) of coils 23A to 23F in terms of the number of pole pairs and protrusions 24A to 24F as magnetic poles.
As shown in FIG. 1, the rotor 2
5. The number of protrusions 27A to 27D as magnetic poles provided on the rotor 25 is different from the number of protrusions 24A to 24F of the stator 21, and is four in the illustrated example.

When the coil 23A is energized, the coil 2
The magnetic flux created by 3A is generated by the air gap 2 from the projection 24A on the stator 21 side.
8, the rotor 25 enters the rotor 25 from the protrusion 27A on the rotor 25 side, and again passes through the air gap 28 to the protrusion 24B on the stator 21 side. At this time, the protrusion 27A on the rotor 25 side is evenly (equal in area) opposed to the protrusions 24A and 24B on the stator 21 side, so that no torque is generated due to the difference in the magnetic attraction force.

Next, when the coil 23B is energized in this state, the magnetic flux generated by the coil 23B passes through the magnetic path reaching the projection 24B, the gap 28, the projection 27B, the gap 28, and the projection 24C. At this time, the protrusion 27B on the rotor 25 side does not overlap with the protrusion 24B on the stator 21 side, and the magnetic resistance is increased.
The suction force acts in a direction to reduce this, and the protrusions 24B, 2B
The rotor 25 rotates to the point where the opposing areas of 7B become equal. Next, when the coil 23C is energized, the suction force acts in the same manner, and the rotor 25 rotates.

In the illustrated example, when one set of projections (poles) is in equilibrium, in the remaining poles, the stator-side projections and the rotor-side projections do not overlap because of the number of projections and the arc. When the length is changed, both may overlap. Even in such a case, if the opposing areas of the protrusions in the left and right magnetic paths are different, a uniform thrust is applied, so that the rotation is performed on the same principle.

Embodiment 2 FIG. One embodiment of the second aspect of the present invention is shown in FIGS. In the second embodiment, the configuration and operating principle of the motor are as described in the first embodiment.
An air hole 29 is provided in the rotor 25.

By providing the air hole 29, the protrusion 27 provided on the rotor 25 functions as a fan with the rotation of the rotor 25, and the air sucked from the air hole 29 is discharged through the protrusion 27. . Therefore, without providing a special fan for cooling the stator 21,
The cooling effect can be enhanced.

Embodiment 3 FIG. FIG. 7 shows an embodiment of the invention of claim 3.
Shown in The operation principle of the third embodiment is the same as that of the first embodiment, but the protrusions 2 are provided on both end faces of the stator core 22 of the stator 21.
4 and two rotors 25 are provided on a common shaft 26, and are disposed to face both end faces of the stator core 22 via the air gaps 28, respectively.

With the above configuration, both sides of the stator 21 can be used as motors, and the output can be easily increased.

Embodiment 4 FIG. FIG. 8 shows an embodiment of the invention of claim 3.
Shown in The operation principle of the fourth embodiment is the same as that of the first embodiment, except that one of the two rotors 25 shown in FIG. 7 is provided with protrusions 27a on both sides thereof.

According to the above configuration, another stator 21 (not shown) of the same configuration is added, and the projection 24 is
The output can be increased by being opposed to 7a. Further, as long as the strength of the shaft 26 permits, it is possible to increase the number of motors in the axial direction.

Embodiment 5 FIG. In the fourth embodiment, the protrusion 27a is provided on only one of the two rotors 25. However, by providing the protrusions 27 on both rotors 25, different motors can be added to both sides of the motor. It may be.

Embodiment 6 FIG. Although the stator core 22 and the rotor 25 in each of the above-described embodiments 1 to 5 are shown as being constituted by a massive iron core, a protrusion 31a as shown in FIG. Sheet-like magnetic material 3 having
1, the stator core 22 and the rotor 25 may be formed to have a laminated structure.

In this case, by changing the position and size of the projection 31a, the stator core 22 and the rotor 25 are changed.
Projections 24, 27, etc. can be formed. In the case where the air holes 29 are provided in the rotor 25, a portion where the air holes 29 are provided may use a massive iron core, and the periphery thereof may have a laminated structure using the sheet-like magnetic material 31.

With the above configuration, by selecting the type of the sheet-shaped magnetic material 31, the relative magnetic permeability can be increased and the attraction force can be increased.

[0033]

As described above, according to the first aspect of the present invention, a plurality of the same motors are arranged on a common shaft in the axial direction.
This has the effect that the output can be easily increased.
is there.

According to the second aspect of the present invention, the stator core is provided.
When a projection is also provided on the other end surface opposite to the one end surface
In addition, another rotor is provided on the other end face.
Thus, there is an effect that a large output can be obtained with one set of motors.

According to the third aspect of the present invention, the two rotations
Counter to the fixed core side of at least one of the rotors
Because it was configured to provide a plurality of protrusions on the opposite side,
This is convenient when combining multiple sets of motors.
There is an effect that can be combined with a light weight.

According to the fourth aspect of the present invention, the rotor is provided with a shaft.
Configuration with multiple air holes penetrating in the direction
The rotor projections act as fans,
The air sucked from the fan passes through the fan,
There is an effect that the stator core can be cooled.

According to the fifth aspect of the present invention, the stator core is provided.
And at least one of the rotors comprises a sheet-like magnetic material.
Since the laminated structure is adopted, there is an effect that the attractive force can be increased by selecting a sheet-shaped magnetic material having a high relative magnetic permeability.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a reluctance pulse motor according to an embodiment of the present invention.

FIG. 2 is a front view of a stator of the pulse motor.

FIG. 3 is a front view of a rotor of the pulse motor.

FIG. 4 is a front view in which a stator of the pulse motor and a protrusion of a rotor are overlapped.

FIG. 5 is a side sectional view of a reluctance pulse motor according to an embodiment of the present invention;

FIG. 6 is a front view of a rotor of the pulse motor.

FIG. 7 is a side sectional view of a reluctance pulse motor according to an embodiment of the present invention;

FIG. 8 is a side sectional view of a reluctance pulse motor according to an embodiment of the present invention.

FIG. 9 is a plan view of a sheet-like magnetic material used in a reluctance pulse motor according to an embodiment of the present invention.

FIG. 10 is a front view of a conventional reluctance pulse motor.

FIG. 11 is a front view of a stator core made of a sheet-shaped magnetic material of the pulse motor.

[Explanation of symbols]

 Reference Signs List 22 Stator core 23 Coil 24 Projection (first projection) 25 Rotor 26 Axis 27 Projection (second projection) 27a Projection (third projection) 28 Air gap 29 Air hole 31 Sheet magnetic material

Claims (5)

(57) [Claims] 1. A ring-shaped stator core, said stator core
And a plurality of coils wound around the stator core.
The end face is axially integrated with the part between the coils
A first projection comprising a plurality of first projections provided to protrude;
Stator and the one side of the stator core in addition to the first stator
On the other end surface opposite to the above, a plurality of
A second stator provided with a projection , supported on the shaft, and having an axial direction on one side thereof;
A plurality of projections different from the number of the first projections
A first rotor provided with a second protrusion, and in addition to the first rotor, a surface opposite to the one side surface
Provided with a plurality of third protrusions corresponding to the second protrusions
At least one stator and a small rotor from the second rotor
At least one rotor is selected and assembled.
Lactance type pulse motor, wherein the above-mentioned shaft is inserted and arranged in each stator, and each rotor
At least the second projection is in space with the first projection of the stator.
Characterized by being arranged to face each other through
Reluctance type pulse motor. 2. Selecting one second stator as a stator
And select two first rotors as rotors
And the first protrusions on both end faces of the stator
2. The reluctant according to claim 1, wherein the second projections are arranged to face each other.
Type pulse motor. 3. A plurality of stators and a plurality of rotors are arranged in an axial direction.
2. The reluctance type pulse motor according to claim 1, wherein
The second rotor above the rotor sandwiched between a pair of stators.
Used, and the stator sandwiched between a pair of rotors
Reluctance type characterized by using a second stator
Pulse motor. 4. Each rotor has a plurality of axially penetrating rotors.
2. An air hole according to claim 1, wherein
Reluctance type pulse motor. 5. At least one of the stator core and the rotor has a structure in which sheet-like magnetic materials are laminated.
4. The reluctance type pulse motor according to claim 1, wherein: