JPS5812827B2 - Axial phase split type pulse motor - Google Patents

Description

[Detailed description of the invention] The present invention relates to an axial phase split type pulse motor.

FIG. 1 shows a vertical side view of a conventional axial phase split type pulse motor, in which 1 is a housing, and several stators 2 are attached to the inner wall of the housing 1, and spacers 3 are provided between each stator 2. Maintaining appropriate distance.

As shown in FIG. 2, the stator 2 is made by laminating hollow disk-shaped base materials 5 with magnetic pole teeth 4 formed on the inner periphery by punching out magnetic thin plates.
Two of them are integrated with a cylindrical yoke 6 interposed between them, and a coil 7 is arranged inside the yoke.

A rotary shaft 8 is rotatably supported in the center of the housing 1 by a bearing 9, and the rotary shaft 8 has magnetic pole teeth 10 corresponding to the magnetic pole teeth 4 of the stator 2 at both ends, as shown in FIG. The rotors 11 made of the magnetic material formed are each fixed to form a pair with the stator 2.

However, with this configuration, the yoke and rotor must be manufactured by cutting, which requires a large number of processing steps and has the disadvantage of high iron loss.
Furthermore, in terms of performance, there is a drawback that a magnetic potential drop occurs at the connection between the laminated base material and the yoke, resulting in a decrease in magnetic efficiency.

The present invention solves the above-mentioned drawbacks, and consists of laminating a base material made of magnetic thin plates in which a magnetic pole arm having magnetic pole teeth at the tip is oriented in the centripetal direction inside a circular edge, and a group of planar conductors. A rotor made of laminated base materials made of magnetic thin plates having magnetic pole teeth corresponding to the above magnetic pole teeth is disposed within a stator formed by winding concentrically so as to meander between each magnetic pole arm. Thus, the object of the present invention is to obtain an axially phase-split type pulse motor in which the stator and rotor can be easily manufactured by punching, and which also has good magnetic efficiency.

FIG. 4 shows a base material 12 according to the present invention formed by punching out a magnetic thin plate, in which a magnetic pole arm 14 having magnetic pole teeth 13 at its tip is provided inside a circular edge 15 facing centripetally.

Further, FIG. 5 shows an example of a group of planar conductors, and shows a so-called flexible printed wiring board 2 in which conductors 17, 18, 19, and 20 are formed in a meandering manner on a flexible insulating base 16.
A plurality of notches 22 corresponding to the magnetic pole arms 14 shown in FIG. 4 are provided in the center of the magnetic pole 1 in a manner corresponding to the pitch of the magnetic pole arms.

The pitch of the notch 22 is the number of magnetic pole arms (N)
2πt/N (t is the thickness of the flexible printed wiring board 21).

Such base materials 12 are laminated, and the cutouts 22 of the flexible printed wiring boards 21 are attached to the magnetic pole arms 14 one after another, and the flexible printed wiring boards 21 are concentrically wound to form the conductor 17. , 18, 19, 20
One end 18a, 19a 20a and the other end 20b, 18b, 1
7b, and one end 17a and the other end 19b are used as power supply connection ends to form a stator 23 as shown in FIG.

That is, conductors 17-20 are connected in series to form a stator coil.

Figure 7 shows a base material 24 formed into a gear shape by punching out a magnetic thin plate.
The rotor 27 has magnetic pole teeth 25 corresponding to the magnetic pole teeth 13 on the outer periphery and a shaft hole 26 in the center, and the base materials 24 are laminated to form a rotor 27 corresponding to the stator 23.

FIG. 8 shows an embodiment of the present invention using the stator 23 and rotor 27, in which several stators 23 are fixed to the inner wall of the housing 28, and a spacer 29 is provided between each stator 23. I made sure to keep an appropriate distance between them.

The same number of rotors 27 as the stator 23 are disposed within the stator 23 and fixed to a rotary shaft 31 rotatably supported in the center of the housing 28 via a bearing 30.

The relationship between the magnetic pole teeth 13 of the stator 23 and the magnetic pole teeth 25 of the rotor 27 is, for example, when the magnetic pole teeth 13 of each stator 23 are arranged in a straight line in the axial direction, the magnetic pole teeth 2 of each rotor 27 are
5 are sequentially shifted by 1/the number of phases.

FIG. 9 is a diagram showing the operation of the stator 23 and rotor 27. When current flows through the flexible printed wiring board 21 in the direction shown, the magnetic flux passing through the stator 23 and rotor 27 is indicated by the broken line with arrows. As a result, if the magnetic pole teeth 25 of the rotor 27 are in a shifted position with respect to the magnetic pole teeth 13 of the stator 23, the rotor 27 will rotate to a position where they face each other.

Therefore, in the configuration shown in FIG. 8, if the flexible printed wiring boards 21 of each stator 23 are sequentially switched and energized, each rotor 27 sequentially rotates in one direction in response to the excitation, and the rotation shaft 3
0 rotates in steps.

According to the present invention having the above-described structure and operation, the stator and rotor are constructed by laminating base materials formed by punching magnetic thin plates into a predetermined shape, and therefore can be easily manufactured with a small number of processing steps. In addition, since no cutting is required, iron loss is also small.

In addition, the stator is constructed by laminating base materials punched into a predetermined shape and arranging a group of planar conductors to meander between each magnetic pole arm formed on the inner periphery of a circular edge. In addition, the yoke used in the conventional type is no longer required, and there is no magnetic connection other than the gap between the stator and rotor, so magnetic efficiency is extremely high.

Furthermore, since the planar conductor group is formed as a flexible printed wiring board and the printed wiring board is provided with a notch, it is easy to store the coil in the stator, and in particular, it can be used for any number of magnetic poles. Coil storage can be done with the same ease.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of a conventional axial phase split type pulse motor, Fig. 2 is a front view of a base material constituting a conventional stator, Fig. 3 is a perspective view of a conventional rotor, and Fig. 4. 5 is a front view showing one shape of the base material constituting the stator of the present invention, FIG. 5 is a diagram showing an embodiment of a group of planar conductors used in the stator of the present invention, and FIG. FIG. 7 is a perspective view showing one embodiment of the stator, FIG. 7 is a front view showing one shape of the base material constituting the rotor according to the present invention, and FIG. 8 is an axial phase split type showing one embodiment of the present invention. FIG. 9, a vertical side view of the pulse motor, is a sectional view showing the operation of the stator and rotor according to the present invention. 12...Base material, 13...Magnetic pole teeth, 14
......Magnetic pole arm, 15......Circular edge, 16
...Insulating base, 17, 18, 19, 20...
1... Conductor, 21... Flexible printed wiring board, 22... Notch, 23... Stator, 24... Base material, 25... ...magnetic pole teeth,
26...Shaft hole, 27...Rotor, 28
...Housing, 29...Spacer,
30... Bearing, 31... Rotating shaft.

Claims (1)

[Claims] 1. An axial phase split type pulse motor in which the rotor and stator of each phase are arranged side by side in the axial direction with the rotor and stator portions corresponding to each other, and each of the rotors is arranged in parallel on the outer periphery. a laminated structure of gear-shaped magnetic thin plates having magnetic pole teeth at intervals, each of the stator parts being composed of a laminated magnetic thin plate with magnetic pole arms facing inward in a centripetal direction; The flexible printed wiring board is a flexible insulating base having a plurality of notches, and a group of conductors is formed meandering between the notches, In addition, the flexible printed wiring board is arranged such that the cutout portions thereof are attached to the magnetic pole arms one after another and wound in the same circular shape, and furthermore, the conductor groups of each stator portion are arranged such that each conductor is connected in series. What is claimed is: 1. An axial phase split pulse motor, characterized in that the pulse motor is connected to form a stator coil.