JPS5810948B2 - pulse motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulse motor driven by a unipolar pulse input.

Conventionally, a pulse motor driven by a unipolar pulse power supply has a separate so-called drive circuit on the pulse motor side that converts the unipolar pulse input, but its structure is complex, generates large vibrations during operation, and requires a high-speed response. However, it was difficult to manufacture a motor with a large rotation angle.

The present invention has been developed to overcome the above-mentioned deficiencies, and an object of the present invention is to be able to drive only by unipolar pulse input without requiring a drive circuit, to have a simple structure, and to have a rotation angle that is small. The present invention also provides a pulse motor that has the characteristic of obtaining minute values.

Next, embodiments according to the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 and 2, the rotor 1 forms a cylindrical body, and has N poles 1a, 1b, 1c, . . . and S poles 1a on the outer periphery.
', 1b', 1c', . - represents magnetic pole tooth groups 4a, 4b, which constitute the magnetic pole 4 of the first stator C, which will be described later.
4c... and the magnetic pole tooth group 5a of the magnetic pole 5 of the second stake D,
5b, 5c, and so on.

The rotor 1 is fitted and fixed onto a shaft 3 made of a non-magnetic material.

Further, the magnetic pole 2 of the rotor made of magnetic material has magnetic pole tooth groups 2a, 2.
These magnetic pole tooth groups are embedded in the outer periphery of the rotor 1 so as to have an appropriate magnetic resistance between the N and S magnetic poles of the rotor. , are arranged in parallel with the south pole.

The first stator C forming a cylindrical body has a magnetic pole 4 made of a magnetic material, and this magnetic pole has a magnetic pole tooth group 4a.

It consists of 4b, 4c...

These magnetic pole tooth groups are provided to protrude from the plate-shaped substrate C' of the first stator C so as to embrace the rotor 1.

The second stator D is provided with a protruding magnetic pole 5 made of a magnetic material on the plate-like body D' so as to face the magnetic pole 4 of the first stator C and embrace the rotor 1.

The magnetic pole 5 has magnetic pole tooth groups 5a and 5b. Consists of 5c...

The shape of the magnetic pole teeth of the first and second stators is based on the plate-shaped substrate C.
' or plate-shaped body D' is shaved off from both sides toward the tip, and the inner side surrounding the rotor forms a curved trapezoid, and is inclined relative to the side e perpendicular to the substrate or plate-shaped body. The magnetic pole teeth are arranged in pairs as shown in FIG. 4.

From the mutual magnetic resistance between the N and S poles in the axial direction of the permanent magnet magnetic poles of the rotor 1, and the mutual magnetic resistance between the N and S poles of the permanent magnet and the adjacent rotor magnetic pole tooth groups 2a, 2b, 2c... Also, the magnetic pole tooth groups 4a, 4b, 4c..., 5a, 5b, 5c... of the first and second stators C and D, respectively.
The permanent magnet N pole, S pole, and rotor magnetic pole tooth groups 2a, 2b, 2c facing the permanent magnets are arranged so that their mutual magnetic resistance is smaller.

Reference numeral 6 denotes a single-winding coil body, which is arranged so as to surround the magnetic poles 4 and 5 of the stator C2D in a cylindrical casing composed of a first stator C and a second stator D as shown in FIG. be accommodated in.

The bearing 7a is fitted into a hole α protruding from the plate-shaped substrate C' of the first stator C, and the bearing 7b is fitted into a hole β of the second stator D.

The bearing 7a. 7b, the shaft 3 is inserted and fixed to the rotor 1.
is rotatably supported.

Therefore, as shown in FIG. 1, the rotor 1 is rotatably mounted on the bearings 7a and 7b while being embraced by the first and second stator magnetic poles 4 and 5.

Further, a plurality of sets of rotors and stators combined as described above can be provided coaxially.

The operation of the pulse motor of the present invention constructed as described above will be explained with reference to the attached exploded views of FIGS. 4 and 5.

In Figure 4, the voltage v as shown in Figure 3 is 0-t.
When applied to the single-wound coil 6 for one hour, the magnetic flux from the coil 6 is generated in the direction from the stator magnetic pole 4 to the stake magnetic pole 5, so that the magnetic pole teeth 2a of the rotor 1 made of magnetic material are connected to the stator magnetic pole teeth 4a and 5a and this magnetic pole tooth 2
The stator pole teeth 4a and 5a are stopped at a position where the permeance generated between the stator pole teeth 4a and 5a is maximized, as shown in FIG.

Similarly, the magnetic pole tooth 2b stops facing the stator magnetic pole teeth 4b, 5b, and the magnetic pole tooth 2c faces the stator magnetic pole teeth 4c, 5c, respectively.

On the other hand, permanent magnets or DC electromagnets 1a, 1a', 1b.

1b'... are stopped at a part of the inclined side f of the stator magnetic pole teeth so that a part thereof faces each other.

Next, after time 0-t1 has elapsed, as shown in FIG. 3, at time t1-12 when the voltage becomes 0, the rotor magnetic pole tooth 2a shown in FIG. 4 becomes the stake magnetic pole tooth 4a.

The rotor 1 is released from the restraint of the rotor 5a and rotates around the shaft 3 to a position where the permeance between the rotor magnetic pole teeth 1a+1a' and the stator magnetic pole teeth 4a and 5a by the permanent magnets is maximized.

Therefore, the rotor magnetic pole teeth 1a, 1a' move in the direction of the arrow to the side e perpendicular to the inclined side f of the stator magnetic pole teeth, and stop at the position facing the stator magnetic pole teeth 4a, 5a.

Similarly, the rotor magnetic pole teeth 1b, 1b' are stopped at positions facing the stator magnetic pole teeth 4b, 5b, and the rotor magnetic pole teeth 1c, 1c' are stopped at positions facing the stator magnetic pole teeth 4c, 5c, respectively.

When no voltage is applied as described above, the permanent magnet rotor pole teeth 1a, 1a', 1b, 1b'.

1c, 1c'... are stake magnetic pole teeth 4a, respectively.

When stopped at a position facing 5a, 4b, 5b, 4c, 5c, rotor magnetic pole teeth 2b, 2c made of a magnetic material.
Some of ... (stator magnetic poles corresponding to 2a are omitted)
As shown in FIG. 8, stator magnetic pole teeth 4a, 5a, 4b
, 5'b, .

Next, when a voltage is applied, as described above, the rotor magnetic pole teeth 2b, 2c, . . .
.

5a, 4b, 5b, stator magnetic pole teeth 4a, 5
a, 4b, 5b..., that is, from the inclined side f side of these stator magnetic pole teeth to the vertical side e direction, and the permeance generated between these stator magnetic pole teeth and rotor magnetic pole teeth is Sunarichi 2 in the position that maximizes the
b stops facing 4a and 5a, and 2c faces 4b and 5b.

In this manner, the rotor 1 sequentially moves in the direction of the arrow in FIG. 4 and rotates once as the pulses shown in FIG. 3 turn ON and OFF.

Furthermore, when the rotor 1 is to be rotated in the opposite direction to that described above, each component is arranged as shown in FIG. 5, and the pulse motor is operated according to exactly the same principle as described above.

Therefore, the motor of the present invention can rotate clockwise or counterclockwise.

In the above embodiment, the rotor rotates inside the stator, but even if the rotor and stator are swapped in position, the rotor will operate according to the principle described above.

The embodiment shown in FIGS. 6 and 7 differs from the embodiment shown in FIGS. 1 to 5 in that the rotor and stator are interchanged, and 21 in the figure Permanent magnet 1a of the rotor shown in FIG.

1a', 1b, 1b', . . . , 22 is a stator magnetic pole having magnetic pole teeth, which corresponds to the magnetic pole 2 in FIG. 2, and 23 corresponds to the rotor shaft 3 in FIG. 2, respectively.

Further, 24° and 25 are rotor magnetic poles corresponding to the stator magnetic poles 4.5 of the previously described embodiments.

Further, 30 is a connecting tube for mechanically and magnetically connecting the rotor magnetic poles 24 and 25, and is made of a magnetic material.

Coil 26 corresponds to coil 6 in other embodiments.

27 and 28 are bearings made of non-magnetic material.

A pair of spacers 29 are provided to increase the magnetic resistance between the stator magnet 21 and the stator magnetic pole 22 having magnetic pole teeth, and the magnetic resistance between the stator magnet 21, the stator magnetic pole 22, and the cover 31. Made of magnetic material.

A cover 31 is made of a magnetic material, and the distance between the tip of the magnetic pole tooth of the magnetic pole 22 and the cover 31 is set to maintain an appropriate distance in order to increase magnetic resistance.

32 is a screw made of a non-magnetic material, which is inserted into the hole provided in the stator magnetic pole 22 and the stator magnet 21, and is inserted into the hole provided in the stator magnetic pole 22 and the stator magnet 21;
The coil 26, the stator magnetic poles, and the stator magnet are fixed by screwing into screw holes drilled in the coil 26.

Furthermore, the pulse motor of this embodiment combined as shown in FIG. 6 operates on exactly the same principle as the pulse motor of the embodiment already explained in connection with FIGS. 1 to 5. .

In the present invention, a set of rotor and stator is divided into a plurality of parts, and the rotor is provided with a plurality of rotor magnetic pole teeth of a permanent magnet or a DC electromagnet and a plurality of rotor magnetic pole teeth made of a magnetic material, and the stator is provided with a plurality of rotor magnetic pole teeth made of a magnetic material. By arranging a plurality of stator magnetic pole teeth, or by arranging a plurality of sets of rotors and stators coaxially and arranging each member in the same manner as described above, a pulse motor with a small rotation angle can be manufactured.

Further, the pulse motor of the present invention does not require a separate drive circuit, has a simple structure, and has the advantage of easily achieving high-speed response.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the pulse motor of the present invention, FIG. 2 is an exploded perspective view of the pulse motor shown in FIG.
The figure is an input voltage waveform diagram, Figure 4 is a developed diagram showing the operating principle of the present invention, Figure 5 is a developed diagram showing the operation in the opposite direction to Figure 4, and Figure 6 is a further diagram of the pulse motor according to the present invention. FIG. 7 is a vertical sectional view of another embodiment, and FIG. 7 is an exploded perspective view of the pulse motor shown in FIG. 6. FIG. 8 is a developed view showing the operating principle of the present invention, similar to FIG. 4. 1 is the rotor, C2D is the stator, 1at1bp1c...
, 1a', 1b', 1C'... are the permanent magnets of the rotor, 2a, 2b, 2c... are the magnetic pole teeth of the rotor magnetic pole 2, 3
is the rotor axis, 4 is the magnetic pole of stator C, 4at4bt4c
... are the magnetic pole teeth of the magnetic pole of the stator C, 5 is the magnetic pole of the stator D, 5a, 5b, 5c, . . . are the magnetic pole teeth of the magnetic pole of the stator D, 6 is a coil, and 7a, 7b are bearings.

Claims (1)

[Claims] 1. A plurality of sets of permanent magnets or DC electromagnets each having a pair of N and S poles are provided in parallel in the axial direction so as to face the outer periphery of a rotor rotatably mounted in a casing, and the permanent magnets or DC electromagnets are In a pulse smoke driven by a unipolar pulse input in which rotor magnetic pole teeth made of a magnetic material are arranged in parallel with these magnets on the outer periphery of the rotor between each set, the plate-shaped substrate of the first stake forming a cylindrical body and the The stator magnetic pole teeth forming a trapezoidal shape each having a perpendicular side and an inclined side opposite to the plate-like body of the second stator that constitutes the casing together with the first stator are arranged so that the same number of pairs as the rotor magnetic pole teeth face each other. These stake magnetic pole teeth hug the rotor, and when no voltage is applied,
The stator magnetic poles are located such that a part thereof faces a part of the inclined side of the stator magnetic pole teeth, and when a voltage is applied, the stator magnetic poles are attracted to the stator magnetic pole teeth and come to rest facing the stator magnetic pole teeth. The rotor magnetic pole tooth moves from the inclined side of the tooth toward the vertical side, and the rotor magnetic pole tooth is positioned such that a part thereof faces the inclined side of the stator magnetic pole tooth when a voltage is applied. , when no voltage is applied, a permanent magnet or a DC electromagnet that is attracted to the stator magnetic pole teeth and moves from the inclined side to the vertical side of the stator magnetic pole teeth until it stops facing the stator magnetic pole teeth. A pulse motor having a rotation direction determined by the magnitude of permeance generated between the rotor magnetic pole teeth and the permanent magnet or the DC electromagnet and the stator magnetic pole teeth.