JPS61208204A - Rotary solenoid - Google Patents

Abstract

PURPOSE:To flatten output torque by a method wherein a plate magnetic pole with prescribed width is projected from an edge face of cylindrical stator to the center section thereof, and a plate salient pole with prescribed angular width is furnished in the outer periphery of a disc-state rotor, then the magnetic pole and the salient pole are formed so as to enlarge the opposite face's width of both poles at the terminal stage of rotation. CONSTITUTION:Plate magnetic poles 1a, 1b, 1c are provided with projection from an edge face of a cylinder section of a cup-state stator 1 of a soft steel material toward the center section. Salient poles 3a, 3b, 3c are provided with projection in the outer periphery of a disc-state rotor 3 of a soft steel material. The magnetic poles are faced to the salient poles, keeping minute gap 40 by ball grooves 9a-9c, 12a-12c, steel balls 8a-8c and a spring 5. The spring 5 energizes the rotor 3 in the F direction. When an exciting coil 14 is conducted, the rotor 3 is rotated in the C direction. Just then, since the salient poles 3a, 3b are formed so that the opposite face's width of the magnetic poles 1a, 1b and the salient poles 3a, 3b are enlarged in accordance with rotation in the C direction, output torque property is flattened.

Description

[Detailed description of the invention] The invention relates to an id device.

The well-known rotary solenoid has a large output torque and does not use a magnet, so it has a feature that the structure is simplified.

However, it has the following drawbacks. It has the disadvantage that it generates a large mechanical noise during operation, and that the rotational torque is large at the beginning of rotation and becomes significantly small at the end of rotation. Furthermore, due to its configuration, the rotation angle is small, making it difficult to obtain a rotation angle of approximately X degrees or more. Moreover, even if it is obtained, the output torque is small and practicality is lost.

Furthermore, since the rotor moves up and down, it is difficult to attach a position detection device whose output changes depending on the rotation angle, and therefore it is difficult to control the rotation angle using a servo device.

The device of the present invention eliminates the above-mentioned drawbacks, maintains a large output torque, has a flat output torque characteristic, and can freely obtain a torque characteristic that adapts to the load condition, so the servo circuit It has the feature that the stopping position can be made accurate when it is attached.

Especially servo valves in car carburetors. As a control drive source for various automatic devices, it can be small, inexpensive, and operate stably, so it has the effect of providing an effective technical means. Moreover, even when a servo device is not used, it is an effective means as an actuator.

The details of an embodiment of the device of the present invention having the above-mentioned features will be described below.

In Fig. 1 (α), the symbol l is a cup-shaped stator made by press-working a mild steel material. On the paper, the bottom is the bottom of the cup and the top is the open end. There is.

Figure 1 (α), Figure 2 (α), (A) and Figure 3 (α)
1 and 2 respectively indicate the same device of the present invention, and the same members are indicated by the same symbols. Therefore, the three will be explained together.

FIG. 2(α) is a view of the rotor 3 viewed from the direction of arrow G in FIG. 7, and FIG. 2(b) is a view of the stator 1 viewed from the direction of arrow G.

FIG. 3 (1) is a cross-sectional view of the cross section taken along dotted lines 1 and E in FIGS. 1 (α) and (A), viewed from the direction of the arrow.

Next, the configuration will be explained with reference to FIGS. 1 and 2.3.

In Fig. 1(A), the central part is the circular ring, and outward from this is the magnetic pole section 1 consisting of fan-shaped mild steel pieces with a width of 60 degrees and an equal pitch spaced apart by 60 degrees, /h, A flat plate provided with /e is made by pressing a mild steel plate, and the outer sides of the magnetic poles /a, /h, /C are fitted into the openings of the magnetic body l.

The rotor 3 is made by pressing a mild steel plate into the shape shown in FIG. 2 (α), and has salient poles. The width of 3a, 3b, 3Q is 60
They are made larger and spaced at equal pitches.

Ball groove again? αI? bIdeC is formed on the back surface of each salient pole at an axially symmetrical position. The ball grooves 9α, 9b, and 9a can be made by cutting, but they can also be made by pressing.

The soft steel pieces lα, Ib, /, which become the magnetic poles in FIG. 2(b), also have ball grooves /2 a, lj b at axially symmetrical positions.

/2a is made, and when the rotor 3 is stacked on the magnetic poles /ct, /b, and IC, and the rotor 3 is rotated in the direction of arrow C, the steel balls gα, KA, I! :c is a ball bearing that rolls in each ball groove. The rotation angle by such a ball bearing is greater than 60 degrees.

The above-mentioned ball groove 12α, /2 b, I:la
Manufacturing by cutting has the following problems during mass production.

It is optimal that the gap length between the salient poles JII, 3b, 3c and the magnetic poles 7g, /h, 10 is maintained at go microns.

In order to maintain such a gap length, the flatness of the facing surfaces of the salient pole and the magnetic pole must have an accuracy of 10 microns or less. However, plane cutting is relatively easy. Also, the diameters of the steel balls gα, gh, and zaQ are commercially available with better accuracy, so there is no problem.

However, ball groove tα, de b19+? and/+2α.

It is difficult to maintain the cutting depths of 1, 2, and 3 with the above-mentioned accuracy.

Therefore, in this embodiment, the following means are adopted.

The ball grooves 9a, 9h, 9c are made by press working. Since it is a flat mild steel plate, the groove depth can be maintained at a set value.

As shown in Figure 1 (<) and Figure 3 (,), the magnetic pole/
On a, /b, Ie, magnetic poles of the same type /d, /e +'
/f is attached, and the magnetic poles /d, /g, /f are also made of mild steel plates.

The magnetic poles /d, /g, /f have through holes /Uα that become ball grooves.
* /2b * /J t2 is made by cutting or punching press work 6 Steel balls gα, gb, re are interposed in the above-mentioned through holes.

The sum of the thickness of the through hole, that is, the magnetic pole Ice, /g, If, and the depth of the ball grooves 9α, 9h, 9a is the steel ball tα, r
The diameters of b and re are about 5θ microns smaller. Therefore, salient poles 3g and 3b.

The length of the gap between the 3c and 3c is approximately 50 microns, which is characterized by the ability to easily maintain this accuracy.

The details described above are partially enlarged and shown in FIG. 3(d). That is, symbol 3I! is a cross section of a portion of the salient pole, and symbol /a is a cross section of a portion of the magnetic pole.

A through hole 12α is provided in the magnetic pole /d, and is attached to the magnetic pole llI. The air gap length (indicated by the arrow tIO) is obtained by making the sum of the depth of the ball groove 9a and the thickness of the magnetic pole /d shown by the dotted line 50 microns smaller than the diameter of the steel ball fa.

If the ball groove 9tt is removed as shown, the salient pole 3t
If the opposing surface of t is a flat surface, the gap length will be the only difference between the thickness of the magnetic pole /d and the diameter of the steel ball groove, and the gap length can be maintained with better accuracy.

An example of the above-mentioned case is the case shown in FIG. 1Cb), which will be described later.

Even in the case of Figure 1 (α), as shown in Figure 3 (,),
By reducing the gap between the cylinder 13 and the cylinder 13, the rotor 3 will not deviate from the rotation center line, so the salient poles 3et,
, 7A, ball groove 9a on the opposing surface of 3a.

9b,’! e can be removed.

What is shown in FIG. 3(-) is one in which the ball groove 2 shown in FIG. 3(d) is made by other means. Figure 3(d)
Items with the same symbol are the same parts.

A salient pole /p (mild steel plate) of the same type is attached to the third salient pole,
A through hole 9a is provided in this.

Steel ball tα has through hole 9a, /:ie and salient pole J
α, /(is sandwiched between. Since there is no need to create a ball groove in the salient pole 31I, accuracy is improved.

In this case, the salient pole l! The sum of the thicknesses I and Id is made 50 microns smaller than the diameter of the steel ball ta, which has the effect of accurately maintaining the gap length.

In FIG. 2 (α), although not shown, a pack spring in the direction of arrow F is applied to the rotor 3, and steel balls gα, gb are attached to the rotor 3.

t/- comes into contact with the end of each ball groove, rotation in the direction of arrow F is suppressed, and in this state, the salient pole 3α
, 3b, and 3a are magnetic poles lα.

They slightly overlap and face the ends of /b, /c, /d, /a, and If. The opposing surfaces of the salient poles 3a, Jb, 3c and the magnetic poles /d, /a, /f are flat, and the gap therebetween is about SO to 100 microns.

As can be seen from the cross-sectional view of FIG. 3, the symbol DA is a mild steel cylinder whose upper end is press-fitted into a circular groove of the rotor 3.

The cylindrical ring serves as a magnetic path between the rotor 3 and the stator l.

The springer is connected to the air hole 10 of the rotor 3 (Fig. 2(a)
), and the end portion is inserted into the hole 10a. The other end of the spring 3 has a hole/1 (Fig. 2(b)
), and its end is inserted into the cavity // ().

The springer is stretched and at the same time twisted in its longitudinal direction before being inserted into the holes 10, 10a and //, //α. Therefore, α, gb, gc in the steel ball are ball grooves 9a, /2a, 9b.
, /2b, 9e, /coC, and the rotor 3 is
A driving torque is applied in the direction of arrow F (α in Figure C). However, the positions where the steel balls glI, gb, g(- contact each ball groove, that is, the salient poles Ja, 34, 3c are the magnetic poles /d).

It is stopped at a position slightly opposite to and overlapping with 1g and If. The torque in the direction of arrow F is obtained by the torsional torque of the spring 5 serving as a pack spring. The excitation coil/lI is wrapped around the cylinder 13 and the stator l after being solidified.
It is attached between the outside of the

Cylinder /3 is not necessarily required, but the stator l
It is planted in the center and forms a magnetic path together with the cylinder q.

When the excitation coil /lI is energized, its magnetic flux is as shown in Fig. 3 (
In α), stator l1 cylinder/3,4I, 3 rotor 3
(Including salient poles 3I!, 3b, 3e) and magnetic poles /a, /b
, /c, /d, /#, If, closed via stator l.

At this time, the torque of the rotor 3 will be explained next with reference to the developed view of the salient poles 31E, 3b, 3c and the magnetic poles /d, /a, /f in FIG.

In FIG. S, salient poles 3a, 3b, Ja and magnetic pole /d,
/g, /f are shown in Figure 2 (,), (A) and Figure 3 (
el) are shown with the same symbols.

The width of each salient pole is slightly larger than 60 degrees, the width of each magnetic pole is approximately 60 degrees, and the magnetic poles and salient poles are arranged at equal pitches.

In the case of the embodiments shown in FIGS. 2(α) and (A), the first row in FIG. 5 shows the salient poles 3a, 34, 3c, and the third row shows the magnetic poles 1d, tg, If. When the excitation coil /da is energized, the magnetic poles /d, /e, /f are excited, so the salient poles JeL, 3b.

36, different polarities are generated by induction, an attractive force is generated in the direction of arrow C, and the rotor 3 rotates in the direction of arrow C.

The output torque curve due to the salient pole 3c in FIG. 1 (11) resembles the curve core of the graph in FIG. 7, with a steep rising portion and a peak value at the initial stage.

As estimated from the shape of the salient poles 3α and Jb, and confirmed by actual measurements, the salient poles 3α and Jb have a peak value at the rear edge, as shown by the curve 2t in the graph of FIG. The horizontal axis of the graph in Figure 9 is the rotation angle, and the vertical axis is the torque.

Since the salient poles Jtt and 34 have the same torque curve shape, the curve -t in Figure 1 is the composite torque of both, and its peak value is adjusted so that it is the same as the peak value of the curved core. has been done.

Therefore, the combined torque of the curved core and 2g has a characteristic of having a flat torque characteristic as shown by curve 30b.

The symbol O in FIGS. 1(α) and 3(α) is a gear, which is fixed to the rotor 3. Therefore, rotational output can be extracted from this gear 6 to rotate the load. Further, a load can also be driven by a rotating shaft 6α installed at the rotation center of gear B.

Further, the load can be moved by pressing the load by using the planting bin 7 set up in the 7th part of the rotor 3.

What is shown in FIG. 7(b) and FIG. 3(b) is another embodiment, and parts with the same symbols as those in the previous embodiment are the same members, so a description thereof will be omitted. The salient poles and magnetic poles are shown in Figure 2(a),
The salient pole shown in (b) has exactly the same shape as the magnetic pole.

The difference from the previous embodiment is that a rotating shaft/S with one end fixed to the rotor 3 is used, and a spring! and the cylindrical part and /3 have been removed.

The rotating shaft /S is rotatably supported by a bearing /6 (a ball bearing may be used) fixed to the bottom plate, and the central hole of a mild steel disc /7 is press-fitted and fixed to the rotating shaft 15. ing.

The ring with the symbol /α is a slippery plastic ring that is interposed between the disc / and the stator l, and the rotor 3 and the magnetic poles /d, 1m, /f are spaced apart from each other and the steel balls gα, ,
This prevents tb and re from escaping from the ball groove.

A spiral spring (not shown) is applied to the rotor 3 in FIG. The fact that the rotor 3 is held in a predetermined position by contacting the end of the ball groove is exactly the same as in the previous embodiment.

When the excitation coil/<1 is energized, the resulting magnetic flux is caused by the stator/1 disc/1 rotation axis 13° rotor J (including salient poles 3a, 3h, and JC) and the magnetic poles in Fig. 3<b>. /a, Ib,
le, /d, 1g, jf, closed via stator l.

Therefore, the output torque due to the salient pole 3C is the curved core of the graph in FIG. 9, and the salient pole 3α.

3b also has a curve C, so their combined torque becomes a curve 717A, which is characterized by a flat torque characteristic.

In the graph of FIG. 9, by using only the portion indicated by the arrow 29 between the dotted line and 8 as the output torque, a flat torque output can be obtained.

Substantially, the width of the arrow uta is approximately DaS degrees.

The output torque is approximately proportional to the second power of the current flowing through the exciting coil/da. In addition, the magnitude of the output torque depends on the size of the gap between the opposing surfaces of the salient pole and the magnetic pole, and the size of the gap between the cylindrical bow and the Depends on it. Therefore, it is necessary to make the above-mentioned void as small as possible.

In this embodiment, a product made by pressing a mild steel plate has been described, but it can also be made by using sintered mild steel powder.

Although an example has been shown in which a back spring is provided between the rotor 3 and the stator l, the same effect can be obtained even if a back spring is applied to the load.

The dotted lines C and C in FIG. 3(h) are a gear train and a load, respectively. Rotating output shaft l for gear train for speed increase or deceleration! The rotational torque of a can be transmitted to the load roller to move or rotate it.

Salient poles 3α, , , 7 b in Figure 1 (,), Cb)
, 3 a and magnetic poles /a, /b, le, /d, /#, j
The width of both f may be set to 60 degrees, and in this case, the length of the arrow 9 in FIG. 9, that is, the effective rotation angle decreases. Also, even if the width of each magnetic pole and each salient pole is made smaller by 60 degrees, the rotation angle will similarly become smaller, but the features of the present invention will not be lost. Plastic balls can also be used for gα, zasu, and te.

In this embodiment, the shape of the salient poles ja, 3b was changed to a wedge shape to achieve the purpose, but the magnetic pole /d.

The same purpose can be achieved by changing the direction to a wedge shape.

Salient pole 3a in Fig. 3,...? A, 3e, symbol 3 in the first row
As shown by d, 3g, and 3f, even if the shape is changed, the torque characteristics become flat, and one of the objects of the present invention is achieved.

The rear edges of the salient poles 3d, 3m, and jf have a triangular shape that protrudes upward in the direction of rotation, forming an inclined surface, and the width 3 of the salient poles in the direction perpendicular to the direction of rotation is the magnetic pole/
It is narrower than those of d, /a, and /f.

As the salient pole 3a rotates, the torque generated by the salient pole 3a increases as shown by the arrow Jk.
, a torque is generated due to magnetic lines of force that are inclined at a distance of 3 m.
A decrease in torque is prevented, and the slope of the trailing edge further prevents a decrease in torque, □IJK, □, □7°. In addition, the torque characteristic is flat as shown by the 7° curve 7. The situation is the same for the salient poles 3d and 3f, and the resultant torque is as shown in curve 38, which has the effect of providing a flat torque curve.

By making the width and slope of the trailing edge slope of the salient pole 3d, Jm, 77 in Fig. 5 curved, it is possible to obtain a flatter torque characteristic or a torque characteristic suitable for the load. .

Delete the slope part of the salient pole jd in Fig. 3 as indicated by the dotted line 3j,
Furthermore, even if the slope portions of the other salient poles 3a and Jf are removed as shown by the dotted lines, substantially flat torque characteristics can be obtained. In this case, as shown by arrow 3S, the length is
Magnetic pole/d.

Since /a and /f are smaller than those of /a and /f, the inclined magnetic lines of force indicated by arrow 3 and 3 m prevent a decrease in the torque at the trailing edge.

For example, the shaft of a servo valve of a carburetor that controls the intake of gasoline in an automobile is directly connected to the rotating shaft/left of the above-described embodiment, and the amount of current supplied to K and excitation coil/I is controlled by a servo circuit as described later. By doing so, the flow rate of gasoline can be adjusted.

Depending on the need, a star gear may be used to speed up the rotation of the rotating shaft l.

When using a servo circuit, it is effective to have a flat torque curve, but when using it for the same purpose as a well-known rotary solenoid, a characteristic like the curve in Figure 4 may be acceptable. There is. In such a case, the salient poles 3g, 3b shown in FIG. 2(α) can be used as shown in dotted line B, ie, in the same shape as the salient pole 3C, instead of having the wedge shape.

The features of the apparatus of the present invention explained in each of the above embodiments are as follows.

First, there is no loud impact noise during operation.

Thirdly, the output torque can be increased by reducing the air gaps between the members forming the magnetic path described above. Thirdly, the rotation angle can be increased. The configuration is first simplified. This is particularly simplified in the embodiment of FIG. 1 (4I).

Next, excitation coil 14 in figure g (,)! Seven examples of energizing means will be described.

In Fig. 0, symbol 19 is a constant current circuit, and terminal /9
The energizing current of the excitation coil/l is controlled by the input signal of [Corporation]. Symbols lzaa, lrb are power supply voltage negative electrodes.

When electric switch /9b is closed, the excitation coil /l is energized. Therefore, the salient poles 3g and 3h in FIG.

3c is attracted by the magnetic poles /d, /a, /f and rotates in the direction of arrow C.

By changing the input signal at terminal /9a, the output torque is changed.

When the excitation coil/da is energized, the rotor 3 rotates in response to the back spring and the load, but the electric switch/9
When A is opened, the excitation coil/Q is de-energized, so
It springs back in the direction of arrow P mentioned above. Since a magnet is not used at this time, it has the characteristic of being able to perform a smooth return operation without generating any jerking torque.

1st. In the embodiment shown in FIG. 3, there are three salient poles and three magnetic poles, but they may be numbered q, five, and so on. In this case, the output torque increases, but the rotational operating angle decreases.

Next, the case where there are C salient poles and magnetic poles will be explained with reference to FIG. 6 and FIG. Components with the same symbols as those in the previous embodiment are the same members, so their explanation will be omitted.

FIG. 6 shows the dotted line 1. in FIG. It is a sectional view of the cross section of E as seen from the direction of the arrow.

In Fig. 6, the center of the bottom of a cylinder l, which serves as a magnetic stator made of mild steel, is protruded into a cylindrical shape (ko α, xb) by press working, and an oil-less bearing / j d
, /! a is inserted into the housing, and a rotating shaft /S is rotatably supported by these. E-ring/T c is rotation axis/3
And the rotor 3 fixed to this moves upward, and the steel ball g g.

This prevents rb from escaping.

A mild steel cylinder is press-fitted into a circular groove on the back surface of the rotor 3. FIGS. 7(α) and (b) respectively show the rotor 3 (including salient poles 3α and 3b) and magnetic poles /α and / in FIG.
h, /d, /g) seen from above.

The width of salient poles 3α and 3h is wider than 90 degrees, magnetic poles /a, /
The widths of b, /d, and /# are 90 degrees. Steel ball ga, 1! The ball grooves 91+, squirrels, 12g, and /b are made by holding the ball h, and these constitute a ball bearing, which is the same as in the previous embodiment. - Torque in the direction of arrow F is applied by a back spring (not shown), but steel balls α and b contact the ends of ball grooves tII, 9b, The rotation of J is suppressed, and in this position, the salient poles 3α and 3b slightly overlap and face the magnetic poles /d and /a, and when the rotor 3 is rotated in the direction of arrow C, the opposing surface increases. It has become.

As shown in FIG. 7(b), the magnetic pole lα,/h has a circular ring field in the center, a fan-shaped soft steel piece lα,/h on the outer periphery, and the outer periphery serves as a stator. It is press-fitted into the open end of the cylinder l.

Above the magnetic poles lα, 1b are fan-shaped mild steel pieces /d, / of the same type.
- are pasted, and the magnetic poles /d, /a have through holes /co α, /cob, and the cutting or punching press α, 9b is not necessarily necessary. Rotating axis/& is bearing 1! rd,
/! This is because the rotational position is specified by -.

Also, only the ball grooves 9α and qb of the rotor 3 are used, and the magnetic poles /d,
Remove /a, steel ball ga and 1b as planar magnetic pole /Lx.

The same purpose can be achieved by abutting against 16. This configuration is the least expensive. Such measures can be applied to embodiments with other bearings.

The thickness of the magnetic pole /d, II- is determined by the steel ball jα
, trb by the gap length has the effect of accurately maintaining the gap length.

The excitation coil /9 is installed inside the cylindrical ring and stator l as shown in the figure, and when it is energized, the stator 19 cylindrical core a
, Yub, :'q Tsutsuhiro 9 rotor J (salient pole 3a, jII
A magnetic path is closed via the stator l (including the magnetic poles lα, lb, /d, /#).

Therefore, similar to the previous embodiment, the salient pole Ja, 36 is the magnetic pole /d,
/g and rotated in the direction of arrow C against the back spring. Instead of the E-ring 11e, a mild steel disk 17 shown in FIG. 3(b) is fixed to the rotating shaft /j, and the stator 11 rotating shaft /! can also be used as a magnetic path. At this time, the cylinder q becomes unnecessary. As mentioned above, the torque due to the salient pole 3h has a curve 30A, and a flat torque characteristic can be obtained. However, in this embodiment, the following means are adopted to achieve the same purpose.

Dotted lines 3g in FIG. 7(α) are magnetic poles /a, /A, /d.

It shows an outer diameter of 1 m. As shown in the figure, the radial length of the salient poles 3α and JA is smaller than the outer diameter 3g. Therefore, when the salient poles 3t and 36 rotate in the direction of arrow C, oblique lines of magnetic force as shown by arrows 39ε and 3deb are generated, compensating for the output torque that decreases with rotation, and making the poles almost flat. There is a feature that allows a flat torque characteristic with a relatively large angle to be obtained.

Next, the embodiment shown in FIG. 3(c) will be described.

In FIG. 3(1), parts with the same symbols as those in the previous embodiment are the same members. The stator 1 is cup-shaped and has a large cylindrical shape, the third bearing /A in the third column (b) is removed, and a rotor 33 made of a magnetic plate is press-fitted and fixed to the lower end of the rotating shaft 1S.

The rotors 3 and 7 have exactly the same configuration as the rotor 3, and 3 correspond to the salient poles 3α, Jb, and Je shown in FIG.
It consists of several salient poles. On the bottom of the cylinder l, there is a magnetic pole 1
The outer portions of mild steel plates of the same shape having magnetic poles corresponding to a, Jb, /e and magnetic poles /d, /a, /f are press-fitted and fixed.

In FIG. 3(,), only the member corresponding to the magnetic pole lα1 annular ring 74 and the hole /2d corresponding to the through hole lcore a are shown. The members corresponding to magnetic poles /a and ld are magnetic poles α,
Denoted as Ad.

The salient poles 3tx, 3h, . . . and the salient poles of the rotors 3, 7 are fixed to the rotation axis/rK so that they have the same phase.

Each magnetic pole is also fixed to the stator so that they have the same phase.

The ball bearing device using the through hole/2d etc. is also similar to that shown in Fig. 3<h>.

Rotation axis l! Since the bearings of rotors 3 and j, ? have been removed, In this case, ball grooves shown by symbols 9tx, 9b, and 9c in Fig. 2 (→) are required.Also, the same purpose can be achieved as a nine-ball bearing device as described above with reference to Fig. 3 (1). When energized, the rotor, ?, ,
? ,? and the rotating shaft /S rotate as one body, and when the excitation coil /q is energized, the rotors j, J, ? generates driving torque and rotates. The rotors 3 and 3.7 have the same torque characteristics, and the output torque is obtained from the rotating shaft /3, which is twice the torque as in the case of FIG. 3(b).

, The section whose cross section is indicated by the symbol 3 indicates an annular portion for connecting the bases of the three salient poles of the bottom plate to each other.

The one shown in FIG. 3 (c) is an embodiment in which the rotating shaft/3.output shaft/left α can be driven left and right.

In FIG. 3(f), the same symbols as in FIG. 3(1) are the same members. The differences are as follows.

A stator l (cylindrical) is press-fitted and fixed from above to the outer periphery of the magnetic disk, and a stator 8 (cylindrical magnetic body) is press-fitted from below.

At the lower end of stator 3S there is a magnetic pole column, yud (Fig. 3 (1)
) is press-fitted and fixed.

Axis of rotation/! is inserted through the central hole of the disc through a gap. The rotor 3 shown by the dotted line has the same configuration as the rotors 3 and 7 in FIG. 3(1), but this salient pole group
The salient pole group and the phase are arranged at even 60 degrees.

When the excitation coil/da is energized, similar to Fig. 3(c),
The rotating shaft 15 rotates in a predetermined direction. However, the excitation coil/
When Qt is energized, the rotating shaft 13 returns in the opposite direction and receives rotational torque.As explained above, there is an effect that the rotating shaft 13 can generate forward and reverse output torque.

When the device of the present invention controls, for example, a servo valve of a carburetor, a servo circuit is required. For this reason, a position detection device whose output increases or decreases in proportion to the rotation angle of the rotor 3 is required. Next, I will explain it.

In FIG. 1(b) and FIG. 2(α), a plastic magnet is also attached to the outer periphery of the salient pole 3α and magnetized in the radial direction, and a Hall element 30 is placed on the main body side opposite to this.
(A magnetoresistive element may also be used.) is fixed. .

The magnet aW is magnetized in the radial direction parallel to the paper surface, and the strength of magnetization is adjusted so that when the magnet λ9 rotates together with the salient pole 311, the Hall output gradually increases or decreases.

Therefore, the Hall output becomes a position detection output. It is preferable to adjust the strength of magnetization so that the Hall output is as linear as possible. Support body 30 @ is Hall element 3
This is to support 0.

FIG. g (A) shows a circuit that controls the rotation angle of the rotor 3 shown in FIG. 1 using the position detection signal.

The axis of rotation l in Figure 1 (h)! The symbol blade is a circuit that outputs an electric signal (voltage) that commands the opening angle of the valve when controlling the opening and closing of a load such as the aforementioned servo valve using r. Symbol 2 is a circuit that outputs the above-mentioned position detection signal.

The position detection signal becomes larger as the valve opens. Also, as the current flowing through the excitation coil/da increases, the valve opens more rapidly.

When the set value of circuit 3 is input to the operational amplifier evaluation, if the valve opening is too small at this time, circuit 2λ
The output of is small, the base current of transistor m is large, the opening of the valve increases, and when the two inputs of the operational amplifier become almost equal, the rotating torque and the torque of the back spring are balanced and the motor stops. The opening of the valve corresponds to the output of the circuit N.

Any other known means may be used as the position detection means. For example, fixing a metal film resistor to the circumferential surface of the rotor 3,
A position detection signal can be obtained from the brush that is in sliding contact with this.

It is clear that servo devices of the same means can be added to other embodiments as well.

As described in each of the above embodiments, the apparatus of the present invention achieves the object stated at the beginning and is highly effective.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the external appearance of the device of the present invention, Fig. 2 is an explanatory diagram of salient poles and magnetic poles, Fig. 3 is a cross-sectional view of the device of the present invention, Fig. 9
The figure is a graph of the output torque curve, Figure 3 is a developed view of salient poles and magnetic poles, Figure 6 is a sectional view of another embodiment, and Figure 7 is
Similarly, the explanatory diagram of the salient pole and the magnetic pole, and the second figure respectively show the energization control and servo circuit diagrams applied to the device of the present invention. / , , 3! r...Stator, /a, /b,
/e, /d, 1g, /f...Magnetic pole, C...Magnetic disk, J...? ,? ,,? ri...rotor,
3a, 3b, 3e. ..., 3f... salient pole, Ta... spring,
Da, /J, Yuα, Kob...Magnetic cylinder, Zaa. gb, rrc--steel ball, 9tx, 9b
. 9e, /2a, /cob, 12e' =-ball groove. 6...Gear, 6α, l! r,/! rα...Rotating axis, 7... Planting pin, 30... Hall element,
30 a...Support body, Kosa magnet 1, 1
0.

Claims (2)

[Claims] (1) A stator made of a cylindrical magnetic material, and a magnetic material disposed on the top or bottom surface of the stator, or both sides thereof, at a predetermined width that protrudes from the outer periphery to the center. n pieces of magnetic poles (n is a positive integer) made of flat plates, with a magnetic disc in the center, protruding radially from the outer periphery, and arranged so that the width is equal to or larger than the width of the magnetic poles described above. A rotor provided with one salient pole, and one set of the above-mentioned magnetic pole and salient pole face each other with a slight gap therebetween, so as to rotatably support the rotor including the salient pole, A ball bearing consisting of a ball groove provided in a magnetic pole and a salient pole and a ball interposed therebetween is arranged along the central axis of rotation of the rotor so as to form a magnetic path between the salient pole and the stator. an excitation coil wound around the magnetic body, a mechanism for preventing separation between the salient poles and the magnetic poles, and a mechanism for preventing separation between the salient poles and the magnetic poles, between the magnetic body and the inside of the cup-shaped magnetic body; When the salient poles of the rotor and the rotating shaft are rotated by a mechanism that suppresses and holds the rotor from rotating at a position where the poles and magnetic poles overlap by a small width and face each other, and by energizing the excitation coil. The rotor is equipped with a mechanism in which the width of the opposing surfaces of the salient poles and the magnetic poles in the direction perpendicular to the rotation direction is larger at the end of rotation than at the beginning, or a mechanism that generates torque with equivalent characteristics. A rotary solenoid device comprising: a drive mechanism for a load; (2) A stator made of a cylindrical magnetic material, and a magnetic material disposed at a predetermined width on the top or bottom surface of the stator, or both sides thereof, protruding from the outer periphery to the center. n pieces of magnetic poles (n is a positive integer) made of flat plates, with a magnetic disc in the center, protruding radially from the outer periphery, and arranged so that the width is equal to or larger than the width of the magnetic poles described above. A rotor provided with n salient poles and one set of the above-mentioned magnetic poles and salient poles face each other with a slight gap between them, so as to rotatably support the rotor including the salient poles. A rotating shaft mounted on the rotor, a bearing provided on the stator, a ball bearing consisting of a ball groove provided on either the opposing surface of the magnetic pole or the salient pole, and a ball interposed between the two;
In order to form a magnetic path between the above-mentioned salient poles and the stator, a magnetic body including the rotor's rotation axis and forming a magnetic path provided between the rotor and the stator, and a cylindrical-shaped magnetic body and Between the inside of the magnetic body, an excitation coil wound around the magnetic body, a mechanism for preventing separation of the salient pole and the magnetic pole, and a mechanism in which the salient pole and the magnetic pole overlap by a small width and face each other. At this position, when the rotor's salient poles and rotating shaft are rotated by the mechanism that suppresses and holds the rotor's rotation and the excitation coil's energization, the salient poles and magnetic poles in the direction perpendicular to the rotation direction are rotated. The width of the opposite surface of
1. A rotary solenoid device comprising a mechanism in which the end stage of rotation is larger than the initial stage of rotation, or a mechanism that generates torque with characteristics equivalent to this, and a drive mechanism for a load provided on a rotor.