JPS5970178A - Dc linear motor - Google Patents

Abstract

PURPOSE:To enable to inexpensively form a DC linear motor and to improve the efficiency of the motor by opposing a magnetic plate having a field magnet and an armature having an armature coil and securing the magnet to the recess of the plate. CONSTITUTION:Field magnets 6' of N-pole or S-pole are secured to the recess 9a of a magnetic plate 9 formed continuously at the side longitudinal section, and the poles of S-pole or N-pole on the opposite surface of the N-pole or S-pole of the magnets 6' are magnetized at the projection 9b of the plate 9. The plate 9 and the armature formed of the armature coil group are opposed, one is used as a movable element, and the other is used as a stator.

Description

[Detailed description of the invention] The present invention relates to a DC linear motor.

Recently, there has been a great demand for the development of a direct current sweat amotor.

For this purpose, the applicant has filed Japanese Patent Application No. 184225
No. 56-172621 and many other DC linear motors were mounted on the shaft. Here, the conventional DC linear motor uses a long plate-shaped field magnet 6 having alternating N and S magnetic poles as shown in FIG. 1, for example.

If a DC linear motor is formed using such a field magnet 6, the DC linear motor will be very expensive. In particular, if a samarium cobalt rare earth magnet is used as the field magnet 6 instead of a ferrite magnet in order to form an extremely efficient DC linear motor, the DC linear motor will be very expensive.

Also, if you use it as a moving magnet type DC linear motor,
Since the moving element is a field magnet, the moving element is heavy, which imposes a corresponding load, resulting in an inefficient DC linear motor.

The DC linear motor of the present invention has been developed based on the above-mentioned circumstances, and is aimed at providing a DC linear motor that can be manufactured at low cost and has good efficiency.

The object of the present invention is to induce a field convex portion of an N pole or an S pole in a concave portion of a magnetic plate formed continuously in the side longitudinal section,
The magnetic plate having the field magnet and the armature including the armature coil group are arranged opposite to each other, and either one of the magnetic plate having the field magnet and the armature is moved relatively. This is achieved by providing a direct current linear motor characterized by having one mover as one movable element and the other as a stator.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the DC linear motor of the present invention will be described with reference to the second drawing and the following drawings.

First, a movable magnet type DC linear motor LM as a first embodiment of the present invention will be explained with reference to FIGS. 2 to 7. The movable magnet type DC linear motor LM does not have the disadvantage of having to move the power supply coat, etc. unlike the movable coil type DC linear motor LM', so it is convenient for long-distance travel of the movable element. 1 is a long plate-shaped base, 2 is a body yoke having a width narrower than the base 1 (formed in the form of a long plate-shaped magnet 1), and is provided around the upper surface of the base 1. 3 is a frame-shaped The stator armature is formed by fixing the armature coils (see Fig. 6) wound on the long plate-shaped magnetic yoke 2 so that all three groups of armature coils do not overlap each other. 4 is a printed circuit board fixedly attached to the top surface of the stator Mlfi element consisting of three groups of armature coils, 5 is a Hall element used as a position detection element arranged on the top surface of the printed circuit board 4, and a Hall IC. One magnetoelectric conversion element 5 is provided in each armature coil 3.The conductor portion 3b of the armature coil 3, which is parallel to the moving direction of the mover, contributes to the thrust force. The conductor portion 3a of the armature coil 3, which is perpendicular to the traveling direction of the mover, contributes to the thrust (see Figures 6 and 7).The armature coil 3 contributes to the thrust. The opening angle width of the conductor portions 3a and 3a contributing to this is set to be an odd number of the magnetic pole width of a field magnet 6', which will be described later, or equal to the magnetic pole width of the field magnet 6' in this embodiment. It is desirable to arrange the element 5 on the conductor portion 3a that contributes to the thrust of the child coil 3.However, if the element 5 is arranged at such a position,
The field gap increases by the thickness of the element 5, and the magnetic field becomes weaker (
Therefore, find the position of the hollow part within the frame of the armature coil 3, which is at the same position as the conductor part 3a that contributes to the thrust of the armature coil 3, and place the element 5 on the printed circuit board 4 at that position. It is arranged. This is desirable because all of the above-mentioned drawbacks can be eliminated.

A roller 28 is rotatably supported on the φ side surface 7a of the hammer, and a roller 28 is mounted on the side surface of the magnetic yoke 2. The travel guide is set so that it does not move in the Chinese direction.

9 (referring to Fig. 2) is a magnetic plate that is continuously formed into a round shape by pressing a long iron plate, etc. Fixed on the inner surface of the child 7:l-'9, facing the stator ?
A field magnet l-6"i is fixed in such a way that the blood facing the Suguta's turtle is the north pole. In this way, the field magnet l-'6' Since the S pole is scattered on the surface of the concave portion 93, this S pole is induced (In) on the surface of the convex portion 9b.
, and the convex M 9 b 7*i (l Koba S :))i
1- be attacked. Therefore, it is softer than the conventional field magnet 6 (FIG. 1) and costs half as much.
11. Cheaply. The moving element of the linear motor LM can be formed. In this case, if the magnetic plate 9 is deformed to a shape that allows the roller 8 to be attached, the traveler 7 is not required, and the cost of forming the traveler on the sail can be reduced accordingly. Referring to FIG. 7, the armature coil 3 has an enclosing width equal to the magnetic pole width of the field die and cut 6' as described above. The three groups of coils are arranged so as not to overlap each other.Both terminals of each three groups of coils are connected to a semiconductor rectifier 3.

1/I-1 and 14-2 are a positive power supply terminal and a negative power supply terminal, respectively. The output of the t-th conversion element 5 of each group of armature coils (1M element is the semiconductor rectifier 1
It is connected to 3. Upper box, (Mikoko il 3-1
゜..., magnetoelectric transducer elements 5 to 1 for 3-3. ...
, 5-3 are arranged at the same positions as the conductor ffIB3a, that is, at the dot encircling portions 10, 11, +2. The sand mold conversion element 5 for the other 'tun lumber coil 3 is also as above i;
It is sufficient if the arrangement is made under the same conditions as 12. For example, armature coil 3-1. ..., 3-3 (1 upper flux conversion element 5-1.°-, 5-3 is that; h
N, s1α, and the S pole are detected and outputted, so the semiconductor rectifier 13 connects each Kagoisogo coil 3-1. ...,
3-3 shows the arrow] Current flows in the i direction, and the current flows in the arrow 1 direction]
Since the W force is generated, both
To move the sex body plate 9 in the opposite direction, use the power terminal 14.
-1.

It would be a good idea to reverse the polarity of 14-2.

Next, with reference to FIGS. 48 to 11, a moving coil type DC linear motor LM' as the 12th embodiment 1 U of the present invention will be described. This moving coil 'Ii, 6-flow linear motor LM' has almost the same configuration as the moving magnet type DC linear motor LM, and the difference is that the moving element 711 (lIV
3 groups of Isogo coils are arranged as a moving element, and a magnetic plate 9 is provided with a magnetic field 6' as shown in FIG. 5 on the magnetic yoke 2. However, in this case, there is an advantage that the magnetic yoke 2 may be omitted.

In addition, in both the first embodiment and the second row/row, the stator side should be formed long and the mover side should be formed short (10
Naturally, the linear motor is a sex purchase.

Skip ile 3, form 1 [7 is also good is 1-゛'
Not even.

As is clear from the above, according to the DC linear motor of the present invention, the field magnet can be formed at half the cost compared to the conventional one, and the positioning of the mounting hole of the field magnet is extremely uniform. It is highly efficient, the number of parts can be omitted, and since it is a movable magnet type direct current IJ near motor, the -C can also be formed with all the moving wheels, so it has the effect that a highly efficient linear motor can be manufactured at low cost.

[Brief explanation of drawings]

41 is a perspective view of a conventional field bB magnet, FIG. 2 is a top view of a movable magnet type surface flow linear motor according to the first embodiment of the present invention, FIG. 3 is a side view of FIG. 2, and FIG. Longitudinal cross-sectional view of the one in Figures 2 and 3 viewed from the running direction, No. 51 ¥1
Figure 64 shows the perspective view of the magnetic plate with the field magnet, Figure 64 shows the shape of the coil and the arrangement of the magnetoelectric transducer, and Figure 7 shows the relationship between the armature and the field magnet. Development 1st,
FIG. 8 is a top view of a moving coil type countercurrent linear motor according to a second embodiment of the present invention, FIG. 9 is a side view of the one shown in FIG. 8, and FIG.
Is the diagram the same as that in Figures 8 and 9? Figure 11 is a longitudinal cross-sectional view seen from the −1 direction and a developed view of the 1st leg and the field magnet. LM...Movable magnet type surface flow linear motor!, LM'
...Shiyu+1 coil type 1-flow linear motor, 1...
Base, 2... Long plate method 11R rigid body yoke, 3... Armature coil, 3a... Conductor portion contributing to thrust, 3b...
Conductor part that does not approach 1W force, 4... Printed circuit board, 5
...Magnetoelectric conversion element ("Q2 position detection element) 1.6,6'
... Field magnet, 7... Traveler, 8... Roller, 9... f+ki, gender plate, 9a... Recess, 9b
... Convex γ1, 10, 11, 12... Point i monument enclosure, ]3... Semiconductor rectifier, 14-Dobras'1 source, i77, 111-2, My thick tun source terminal .

Claims (1)

[Scope of Claims] 1. The above-mentioned magnetic plate and electric machine having a 10 dC field magnet i fixed with an N-pole or S-pole field magnet 1 in a concave part of a magnetic plate formed continuously in a m-shaped side longitudinal section. An armature consisting of a group of child coils is arranged opposite to each other. A DC linear motor characterized in that one of the magnetic plate having the field magnet and the armature is a mover that moves relatively, and the other is a stator. 2 The armature coil is wound in a frame shape in which the opening angle of the conductor portion contributing to thrust is an odd number multiple of the magnetic pole width of the field magnet or the magnetic pole width induced in the magnetic plate. Claim 1 or 2, characterized in that the DC flow is defined as
DC linear motor described in section.