JPS5854734B2 - 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 has a high speed response. This was difficult and could only be produced with a large motor 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. It also provides a pulse smoke with the characteristic that it can be obtained down to minute values.

Next, embodiments of the present invention will be described based on the accompanying drawings.

In the embodiment shown in FIGS. 1, 2, and 3 of the accompanying drawings, the rotor 1 has a flat disc shape, and has an N pole 1 on its surface.
S pole 1 a/, 1 b'v 1 c'... only a, 1b, 1c...
The loaf magnetic pole 2 is made of permanent magnets (not shown) arranged in a pair at the same position on the circumference, and is further made of a magnetic material.
2c... These magnetic pole tooth groups are arranged on the front and back surfaces of the rotor 1 so as to have an appropriate magnetic resistance between the N and S magnetic poles of the rotor.

The first stake E is formed into a cylindrical shape, and a stator magnetic pole 4 made of a magnetic material and having a cross-sectional shape is suspended inside a hole E' provided with a predetermined gap from the outer periphery of the cylinder. The permanent magnet is provided with a plurality of stake magnetic pole teeth 4a, 4b, which form a trapezoid shape by a side substantially in the same direction as the radial direction of the rotor, a side forming an oblique side with respect to the radial direction, and a side connecting the two sides. Or provide the same number of DC electromagnets.

Further, a stator made of a magnetic material is installed at the center of the plate-like body of the second stake F so that a gap is formed between the plate-like body of the second stake F and the cylindrical body of the first stator E at a predetermined distance from the plate-like body's outer circumference. A magnetic pole 5 is provided protrudingly to face the magnetic pole 4 of the first stator, and the magnetic pole tooth 4 of the first stator is provided at the end of the magnetic pole 5.
Magnetic pole teeth 5a, s having the same shape and the same number as a, 4b...
b... will be provided.

However, the magnetic pole teeth 4a of the first stator and the second stator
, 4b..., 5a, 5b to maintain the air gap between the rotor 1
are arranged so as to face each other.

Compared to the mutual magnetic resistance between the N pole and S pole of the permanent magnet of the rotor 1 and the magnetic pole 2 adjacent thereto, the magnetic poles 4 and 5 of the first and second stator magnetic poles F and the N pole and S of the permanent magnet facing them Each member is arranged so that the mutual magnetic resistance between the poles and the magnetic pole 2 of the rotor is smaller.

Reference numeral 6 denotes an annular single-winding coil body, and when the pulse smoke of the present invention is assembled, the annular coil body 6 is inserted into the gap between the outer periphery of the cylindrical body of the first stake E and the first stake magnetic pole 4. At the same time, the stator magnetic poles are located in the gap between the second stator magnetic poles 5 protruding from the plate-shaped body of the second stator F and the outer periphery of the first stator cylindrical body, and surround these magnetic poles. It is housed inside the cylindrical body of the first stator E so that the first stator E is cylindrical.

Further, the bearing 7a is fitted and fixed in a hole E' bored in the first stake E, and the bearing 7b is fitted in a hole F' of the second stator F.
It is mated and fixed.

A shaft 3 is inserted and fixed to the rotor 1 into the bearings 7a and 7b.
is rotatably supported.

The rotor 1 has a first stator E and a second stator E as shown in FIG.

Each of the magnetic pole teeth 4a, 4b..., 5a,
Face to face with 5b... keeping an air gap.

A plurality of sets of rotors and stators arranged as described above can be provided coaxially.

The operation of the pulse motor of the present invention will be described with reference to the developed view (FIG. 4) of the embodiment of the pulse smoke of the present invention shown in FIGS. 1 and 2.

In Fig. 4, when a voltage V is applied to the coil 6 so as to generate a magnetic flux directed from the first stake magnetic pole tooth 4 to the second stator magnetic pole tooth 5, the voltage V is applied to the coil 6, which is perpendicular to the plane of the paper (top). Magnetic flux is generated in the direction (bottom).

In this case, the first stakes 4a, 4b, 4c...
becomes the N pole, and the second stator magnetic pole teeth 5a, 5b,
5c... becomes the S pole and attracts each other.

A permanent magnetic pole tooth N pole 1a interposed between these two groups,
1b.

1c... S pole 1 a' r 1 b' r 1 c
'... are the stator magnetic pole teeth 4a...5, respectively.
a..., but the magnetic pole teeth (without polarity) 2a, 2b, 2c... made of magnetic material of the caroter are repelled by the magnetic pole teeth 4a, 4bt4c... 5a, 5b, 5c...
・ forms a trapezoid shape with a side in substantially the same direction as the rotor radius, a side forming an oblique side in the radial direction, and a side connecting the two sides, so these magnetic pole teeth 4a..., 5a...・
up to the position where permeance is maximum in relation to
In other words, the stator magnetic pole teeth 4a...5a... are arched and moved in the direction of the oblique side (in the direction of the arrow) with respect to the radial direction of the trapezoidal part of the stator magnetic pole teeth 4a...5a...
and 2a, 4b and 2b, 4c and 2c, 5a and 2 a s5
It stops at the position where b and 2b, and 5c and 2c face each other.

In this case, 4a is the north pole, 2a surface is the south pole, 4b is the north pole, 2
b surface is S pole - 5a is S pole, 2a back surface is N pole, 5b is S pole
The poles and the back surface of 2b are arranged as N poles...

Also, when the excitation voltage becomes 0, the rotor magnetic pole teeth 2a, 2
b, 2cm is stator magnetic pole tooth 4a y 4b.

4c..., 5a, 5b, 5c..., and at the same time the rotor permanent magnetic pole teeth N poles 1a, 1b, 1
c... S pole 1 a/, 1 b/, 1 c'...
・Stator magnetic pole teeth 4a, 4b, which are not magnetized,
4cm, 5a, 5b.

5c... is pulled in the direction of the oblique side with respect to the radial direction of the trapezoidal part (in the direction of the arrow), and moves to a position where permeance is maximum between it and the stator magnetic pole tooth group,
Regarding the two ports in Figure 4 A, 4a and 1a, 4b and 1b,
4c and 1c, 5a and 1a', 5b and 1 b', 5c and l
c/ and stop until they face each other.

In this manner, the rotor 1 sequentially moves in the direction of the arrow in FIG. 4 and rotates five times as the pulses shown in FIG. 3 turn on and off.

Furthermore, when the rotor 1 is to be rotated in the opposite force 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.

Next, another embodiment of the pulse motor, which is different from the above-described embodiment and is configured by swapping the positions of the rotor and the stake, will be described.

This other embodiment has the configuration shown in FIGS. 6 and 7, but when compared with the configuration of the embodiment already explained based on FIGS. 1 to 5, it has 21-1. 21-2゜21
-3 corresponds to the magnetic pole of the permanent magnet shown in Fig. 2, and 21-
1 is a permanent magnet, 21-2, and 21-3 are magnetic poles made of magnetic material, which are magnetically shorted to the north and south pole sides of 21-1, which are magnetized in the axial direction, and integrally form a magnet. do.

The magnetic poles of the magnet made of the magnetic material are designated by reference numerals 21 2a, 21 2b, and 21-2c, as shown in FIGS. 8 and 9.
Displayed at m213a, 213b, 21-3cm.

2:2-1.22-2 is a magnetic pole made of magnetic material, and the second
Corresponds to magnetic pole 2 in the figure, and the magnetic pole teeth of this magnetic pole are numbered 22 1
a, 22 lb, 22-1 cm, 222 a, 2
2-2 b, 22-2 c-.

Further, 23 corresponds to the axis 3 in FIG.

24 is a rotor corresponding to the stator magnetic pole 4 in FIG. 2, and 25 is a rotor corresponding to the stator magnetic pole 5 in the same figure, and the magnetic pole teeth of these magnetic poles are 24a, 24b, 24cm, 25a, 25b.

25c... is displayed.

Reference numeral 29 denotes a connecting tube that mechanically and magnetically connects the aforementioned 24 and 25, and is made of a magnetic material.

26 corresponds to the coil 6 in FIG. 2, and 27 corresponds to the bearing 7 made of a non-magnetic material.

Therefore, the rotor magnetic poles 24 and 25 are connected to the shaft 23 by the connecting tube 29.
The shaft 23 and the shaft 23 are rotatably supported by a bearing 27.

28 is a spacer for increasing the magnetic resistance between the magnetic poles 22-1 and 22-2 connected to the permanent magnets 21-2 and 21-3, and is made of a non-magnetic material.

The above-mentioned members are combined as shown in FIG. 6 to constitute a pulse smoke.

The pulse motor having the structure of the above embodiment operates on exactly the same principle as the pulse motor of the other embodiments explained in FIGS. 1 to 5.

The operation of the pulse smoke of the above embodiment will be explained based on the attached drawings, FIG.

When a voltage of V as shown in FIG.
from the direction of the rotor magnetic poles 25.

As a result, the rotor magnetic pole teeth, e.g. The rotor magnetic pole teeth 24a and 25a shown in FIG. As shown in the figure, magnetic pole teeth 22-1a, 22
Stop facing 2a.

Similarly, the magnetic pole teeth 24b and 25b are the magnetic pole teeth 22-1.
b, 22-2b, the magnetic pole teeth 24c, 25c stop facing the magnetic pole teeth 22-1c, 222c, respectively.

Next, after O-1 time has elapsed, as shown in FIG. 3, at time 11-12 when the voltage becomes O, as shown in FIG.

As shown in the figure, the rotors 24, 25 rotate about the shaft 23 to a position where the permeance between the rotor magnetic pole teeth 24a, 25a and the magnetic poles 2l-2a, 2l-3a of the magnets is maximum.

Therefore, the rotor 24.25 moves in the direction of the arrow, and its magnetic pole teeth 24a, 25a are respectively aligned with the magnetic pole teeth 2l-
2a.

2l-3a, magnetic pole teeth 24b, 25b are magnetic pole teeth 2l-2b, 2l-3b, 24c, 25c are 21
2c and 2l-3c, respectively, and stop facing each other.

In this manner, the rotor, which corresponds to the stator in another embodiment, rotates while sequentially moving in the direction of the arrow shown in FIG. 8 by turning the pulses shown in FIG. 3 ON and OFF.

Furthermore, when the rotor corresponding to the stake is rotated in the opposite direction to that described above, the pulse motor can be operated according to the same principle as described above by arranging each member as shown in FIG.

In the present invention, a set of rotor and stator is divided into a plurality of parts, and a plurality of rotor magnetic pole teeth of a permanent magnet or a DC electromagnet and a plurality of magnetic pole teeth made of a magnetic material are provided on the rotor side, and a plurality of magnetic pole teeth made of a magnetic material are provided on the stator side. By arranging a plurality of stator magnetic pole teeth or coaxially mounting a plurality of sets of rotors and stators configured 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 the setting of a separate drive circuit, has a simple structure, and has advantages such as easy 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 view showing the operating principle of the present invention, Figure 4A is a plan view, Figure 4 is a bottom view,
The figure is a developed view showing the operation in the opposite direction to that in Figure 4, Figure 5A is a plan view, Figure 5 is a bottom view, and Figure 6 is yet another actual example of the pulse motor according to the present invention. FIG. 7 is an exploded perspective view of the pulse motor shown in FIG. 6, FIG. 8 is a developed view showing the operation of the pulse motor shown in FIG. 6, and FIG. The opening is a developed view seen from the right side of FIG. 6, and FIG. 9 is a developed view showing the operation of the pulse motor in the opposite direction to that shown in FIG. 8. A is a developed view corresponding to FIG. 8A, and the opening in FIG. 9 corresponds to the opening in FIG. 1 is the rotor, la + 1 b + 1cmr 1 a
/, 1 b'1c'... is the magnetic pole of the permanent magnet, 2 is the rotor magnetic pole, 2a. 2b, 2c... are the magnetic pole teeth of the rotor magnetic poles, 3 is the rotor shaft, 4 is the first stator magnetic pole, 4a, 4b, 4c...
... are the magnetic pole teeth of the first stator magnetic pole, 5 is the magnetic pole of the second stator, 5a, sb, 5c... are the magnetic pole teeth of the second stake, 6 is the coil, 7a, 7b are the bearings, E is the first stator, F is the second stator.

Claims (1)

[Claims] 1 A plurality of pairs of permanent magnets or direct current electromagnets are formed on the surface of the rotor forming a disk body, and only S poles are formed on the back surface of the rotor, forming pairs at the same position on the circumference. Rotor magnetic pole teeth of the same shape are provided on the front and back surfaces of the rotor so as to be interposed between the DC electromagnets, and the L-shape hangs down inside a hole provided with a predetermined gap from the outer periphery of the cylindrical first stator. A plurality of stator magnetic pole teeth forming a substantially trapezoidal shape with a side substantially in the same direction as the radius of the rotor, a side forming an oblique side in the radial direction, and a side connecting the two sides are attached to the end of the stator magnetic pole of the permanent magnet or DC electromagnet. L-shaped second stator magnetic poles, which are provided in the same number as the first stator, have the same shape and the same number of second stator magnetic pole teeth as the first stator, are provided protruding from the second stator of the plate-shaped body, and the first stator The magnetic pole teeth and the second stator magnetic pole teeth are arranged so as to face the rotor while maintaining a gap, and the annular single-wound coil is connected to the outer periphery of the cylindrical body of the first stator, the first stator magnetic pole, and the second stator magnetic pole. The first stator magnetic pole and the second stator magnetic pole are surrounded and housed in the cylindrical body of the first stator, and the rotor is rotatably mounted inside the coil. By applying a unipolar pulse to the rotor, the rotor is driven to rotate in one direction depending on the magnitude of permeance generated between the rotor's permanent magnet or DC electromagnet and the rotor magnetic pole tooth with the first stator and the second stator, respectively. A unipolar pulse motor that enables