JPS5986469A - Linear stepping motor - Google Patents

Abstract

PURPOSE:To employ a linear stepping motor in a practical use by composing a movable element by coupling units of the number equal to the number of phase having single phase armature winding, a yoke and a permanent magnet field, thereby enhancing the utility rate of an electromagnetic material with a simple structure. CONSTITUTION:A stator rail 30 is composed of a laminated core in which teeth 31 or grooves 32 are formed at an equal pitch perpendicular to the direction of moving axis Z-Z'. A permanent magnet 4 is provided in air gap surfaces opposed to the rail 30 of the yoke 2 of the movable element, and the permanent magnet 4 is magnetized in parallel with the inductor teeth 32 of the rail 30. Movable element electromagnet units 20 are disposed in series or in parallel in the direction of phase number moving axis Z-Z', and integrally coupled to form a movable element.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a permanent magnet carving in which the inductor is an inductor and the field is a multi-pole magnetized permanent magnet.

Traditional permanent magnet type linear stepping motors use permanent magnets magnetized in multiple directions in the direction of movement as stator rails, so the longer the rail, the higher the cost, and the need for iron powder in the same area. There is no problem with the floor cover to prevent suction, and there is no advantage compared to the VRJ type 1.1 stepper motor.

Therefore, the patent application No. 5'7-48737 (
(permanent magnet type linear stepping motor), this point Y:
I was struggling to find a solution, but I created a mover structure in which the rail with the inductor teeth was sandwiched between an armature electromagnet and a multipolar magnetized permanent magnet.

A front sectional view of the prior art is shown in Figure 1.
- Section A and BB' sectional view are shown in Figure 2.

1 is a coil wound around both sides 1 of the yoke 2, 3 is a mover made of a magnetic material with inductor teeth, and 4 is attached to the yoke 2 facing the mover 3 through a gap. The fixed permanent parts 1 and 5 are non-mounting bodies that support the permanent parts 1 and 6 fixed to the movable element 3.

Repulsion between the magnetic pole of the inductor tooth formed on the mover 3 induced by the coil 1 and the magnetic pole of the permanent fi8 stone 4
Due to the suction action, the movable element 3 moves in a direction perpendicular to the plane of the paper in FIG. 1, that is, in a vertical direction in FIG.

As you can see from these figures, there are two voids and the structure is a.
It had the disadvantage that it became sloppy and the performance could not be improved.

An object of the present invention is to solve the problems of the conventional and prior art and to provide a permanent (D-shaped linear stepping motor) which can be put to practical use.

The present invention is based on '! M, in the permanent magnet type linear stepping Tanabata in which Isogo is the inductor and the field is a multi-pole magnetized permanent magnet, the mover (the stator in Figure 1 is called the mover) &1, along the axis of movement, connect several units 1-7 to form a +11 mark, and this unit 1l
-J- Each single-phase 'j)j7 armature wire and yoke, and the air gap surface facing this stator are equipped with a permanent magnet field magnetized with multiple poles in the direction of the moving axis. The magnets are alternately magnetized at a constant pitch along N, S, and Y, but the polarity is reversed between the inner part 1 and the outer part 1111, which are surrounded by the seven machine scrolls.

The stator is composed of a rail-shaped laminated iron core in which inductor teeth are provided on the surface facing the air gap at the pole pair pitch of a permanent magnet, and each phase unit has a constant phase difference with respect to the inductor teeth with a field value. This is a permanent magnet type linear stepping motor arranged around a corner.

FIG. 3 shows a printing diagram of an embodiment of the present invention.

In Figure e, the same symbol f>] as in Figure 1 represents the same or equivalent part.

1. Since the magnet unit 20 has only 1 phase shown, several phases are moved in the z-z' direction or arranged in parallel 7 and connected together to form a pJ. Moving child 7-,.

By the way, in the drawing, the Z-Z' 1l111 direction of the 1J mover 1h and m unit (l phase) 20 is drawn short and the direction perpendicular to it is long, but the straight part of the armature winding l is formed long, so in reality The side in the zz' axis direction is longer than the side in the perpendicular direction.

The stator rail 3 ( ) may be a laminated core with teeth 31 (grooves are 32) arranged at equal pitches perpendicular to the direction of the moving l111z-Z' force, or it may be a solid core if used at low speeds. .

A permanent magnet 4 is provided on the gap surface of the movable yoke 2 facing the stator rail 3 (), and is magnetized in parallel with the inductor teeth 31 of the stator rail as shown in FIG. ing.

Figure 4 shows a permanent magnet pattern of 40 m when the nJ mover 't1 (magnetic unit 20 rotates 180' in the Yθ direction and turns around the x-x' axis in Figure 3). .'
m machine volume! The counterfeit magnetic poles of part A surrounded by # and l and part B which are not surrounded are magnetized so that they are reversed.

Its operation is as follows.

ii At the position where the N pole of the A part of the J mover 20 matches the inductor #I31 of the stator rail 30, the armature winding l has the following: A(N) → air gap → tooth part 31 → air gap → B (S)→Yoke 2→
The rotating magnetic flux φ interlinks with A(N).

When the mover side moves by 1/'2 tooth pitch, the S pole of part A coincides with the inductor tooth 31, so the interlinkage magnetic flux is reversed and -φ
become.

In this way, when the mover 2] moves by l tooth pitches, the magnetic flux linkage changes by lrj and l cycles. If the mover side continues to move at a constant speed, the armature winding l has JπNφ・
A single-phase AC voltage of V/τt is generated 6 (where N is the number of turns, ■ is the speed, τt is the tooth pitch, and φ is the magnetic flux. However, 2, assuming that this magnetic flux φ changes in a sinusoidal manner) ) To operate this as a small motor, a current is passed through the armature winding l. Is the magnetomotive force created by winding 1 equal to that of permanent magnet 4? 1- below a value that will not cause irreversible demagnetization.

If the winding magnetomotive force has a polarity of 1 from A to N, then
The north pole of the permanent 1i stone in part A is strengthened, and the south pole is weakened. The S(- of the permanent magnet in part B is strengthened, and the N pole is weakened.

Therefore, on the movable element side, the N pole of part A of the permanent rock 4 and the S pole of part B are attracted and moved in the direction that coincides with the inductor teeth 31. When the winding magnetomotive force is reversed, the S pole of part A and the N+ of part B
@ is attracted and exploded in the direction that matches the inductor teeth 31. In this way, it operates as a single-phase synchronous machine.

Therefore, multiple mover electromagnet units)2t)g are provided,
Inductor teeth 3 in series or in parallel in the direction of the moving axis z-z'
If the magnetic poles of the permanent magnets 40 and 1 are arranged with a constant phase difference, a multi-phase synchronous machine can be constructed.

The above structure and operating principle have been described using a so-called right-angled inductor in which the straight r11 portion of the armature winding l and the cutting direction of the inductor teeth 31 are at right angles.

Fig. 5 is a perspective view of another embodiment of the present invention, and Fig. 6 is a perspective view of another embodiment of the present invention. This is a diagram showing the relationship between the layer line/zetaane and the inductor tooth of the permanent KLT stone when viewed upside down.

In this other embodiment, the straight part of the armature winding 1 and the inductor teeth 3
The structure of the present invention is applied to an inductor in which the first gear cutting direction is parallel (parallel type inductor). In FIG. 5, the direction of the straight part of the armature winding 1 (direction perpendicular to the moving direction z-z') is shown as short, but in reality it is made long in order to improve efficiency.

Thus, according to the present invention, the following effects are recognized.

■ Since the +jJ actuator electromagnet unit using a concentrated winding inductor has a short coil end and short path length, it is possible to increase the utilization rate of electromagnetic materials (thrust/heavy electric power).

■ The utilization rate of the phase material of the permanent magnet 4 is high, and the cost is low because it is rarely used.

@ 20 movable electric repair stone units can be installed in line or in series with respect to the movement axis z-z', allowing for flexibility in the +t14 configuration, allowing for installation in accordance with the requirements of the machine.

Medium Hybrid type and barrier pull reactance (VR)
Compared to the conventional type, the power factor is good and the peak torque can be large, so the power supply case is small and control is easy.

■ Compared to the conventional permanent magnet type stator rail that uses permanent magnets, fewer magnets are used and the cost is lower.

In addition, the stator rail (material) does not attract iron pieces.

■ As shown in FIGS. 3 and 5, all the features of the right angle inductor and the 1,000 RJ type inductor can be exhibited.

A-A part and B-B'' plane view, FIG. 3 shows the rest of one embodiment of the present invention at night, and FIG. Figure 5 is a diagram of the relationship between the Nagisa magnetic bar'turn of the permanent magnet and the inductor teeth when the magnetic unit is rotated 180 degrees in the θ direction around the Y-Y' axis in Figure 5 and turned over. FIG. 6, a perspective view of another embodiment of the present invention, is a diagram showing the relationship between the magnetization pattern of the permanent magnet of the movable electromagnet unit and the inductor teeth.

l...armature winding, 2...yoke, 3...mover,
4... Permanent magnet, 5... Non-magnetic material, 6... Industrial machine, Machining... Mover' magnet unit (1 phase), (9
)... Stator rail, 31... Inductor tooth, 32...
·groove.

Applicant's agent Kiyono Inomata J-Kuni Figure 2 Figure 9 Figure 4 Figure 5 Figure 0 Co1:l/2 A 2/2 Procedural Amendment ゛(Method) % Formula % Commissioner of the Patent Office Wakasugi 7u Da,・Mr. 1, Incident Display 1982 Patent Application No. 1! l (i in No. 42 No. 2, Name of the invention Linyas deriving motor 3, Relationship with the case of the person making the amendment Patent applicant (662) Co., Ltd. Anyotun Seisakusho Co., Ltd. 1゛Simplified drawings i, ci !llll'l J ノ!:l, Drawing 8, old content (1) 明f'l11-?'li ffi Page 111, line 6, ml-added 1'Htz・=riYo J, +2)
eM Change Figure 2 to look like the one attached to this book.

b2 diagram 3

Claims (1)

[Claims] In a permanent magnet type linear stepping motor in which the armature is an inductor and the field is a multi-pole magnetized permanent 611 stone, the mover has several units of phase along its moving axis. The units are connected to each other, and each unit has a single-phase armature winding and a yoke, and a gap surface facing the stator that exerts a relative driving force on the mover, and a wire in the direction of the moving axis. Equipped with a multi-pole magnetized permanent magnet field, located in the direction of the moving axis and N at a constant pitch. The stator is magnetized with VcN so that the polarity is reversed on the inside and outside surrounded by the armature winding. A permanent magnet-carved near stepping motor made of a magnetic material and characterized in that the field magnetic poles of the unit R of each phase are arranged at a constant phase difference angle with respect to the induction teeth.