JPS59191472A - 2-phase linear motor - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of a coil and the mounting of the coil on a core by associating the coils of concentrical winding and body winding. CONSTITUTION:A core 5 does not have slots and tees. The first coils 6, 8, 9 are composed of alpha-phase body winding coil, and the second coil 7 is composed of beta- phase concentrical coils. The AC current supplied to the first coils 6, 8, 9 and the AC current supplied to the second coil 7 have a phase difference of 90 deg.. A shielding member 11 of high conductivity shields the magnetic flux on the back surface of a linear motor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-phase linear motor suitable for use in an apparatus for stirring molten metal or the like using electromagnetic force.

Conventionally, as this type of two-phase linear motor, those shown in FIGS. 1 to 3 are known. In the figure, 1 is an iron core, and first coils 2, 4 and a second coil 6 are provided in the slots of the iron core. first coil 2,
Reference numeral 4 is an α-phase saddle-shaped coil, to which an alternating current of the polarity shown in FIG. 1 is supplied so as to form a single pole pair. Second
The coil 6 is composed of a β-phase concentric winding coil, and is supplied with an alternating current having a phase difference of 90° with respect to the first coil 2°4. These alternating currents form a traveling magnetic field on the surface of the linear motor, and the molten metal is stirred by this magnetic field.

The conventional linear motor has a concentric winding as described above.
Coil 6'? Since the first coils 2 and 4 are saddle-shaped coils, the structure of the coils becomes complicated.

This invention eliminates the above-mentioned drawbacks of the conventional ones, and the first coil provided on the iron core is wound with a trunk winding type, and the second coil is wound with a concentric winding type, and the coil has a simple structure. The present invention provides a two-phase linear motor that can obtain a traveling magnetic field similar to the conventional one.

An embodiment of the present invention will be described below with reference to the drawings. Fourth
In the drawings and FIG. 5, 5 is an iron core without slots or teeth. Reference numerals 6°8 and 9 denote first coils, which are composed of α-phase body coils, and are supplied with an alternating current of the polarity shown in the figure. Reference numeral 7 denotes a second coil, which is composed of multiple β-phase concentrically wound coils, and is supplied with an alternating current having a phase different by 90 degrees from that of the first coils 6, 8, and 9. Reference numerals 10 and 11 denote high conductivity shield members, which shield the magnetic flux on the back side of the linear motor.

The arrangement of the coils on the cross section of the upper surface of the iron core 5 in the linear motor configured as described above is as in the case of the conventional example shown in FIG. 1 described above.

α■, a traveling magnetic field is generated on the upper surface of this linear motor. Since only the α-phase coil is provided on the back of this linear motor, if the shield member io,
If ii is not installed, alternating magnetic flux will be generated. Since this alternating magnetic flux increases the α-phase glue actance and vibrates the surrounding plum structure, it is desirable to provide the shield member IQ, 11.

In the above embodiment, the iron core is not provided with slots and teeth, but slots and teeth may be provided as shown in Figure @6.

In FIG. 6, 12 is an iron core having slots and teeth, 13, 15, 16 are f, 1 coil, 14 is a second coil, and 17 is a shield part IZ.

Further, although the shield members 10, 11, and 17 are provided in the above embodiment, they may be omitted if no practical problem arises. Although the above embodiment is a two-pole motor, a multi-polar motor may also be used in which this linear motor is repeated horizontally.

As described above, since this invention combines concentric winding and body winding coils, it is possible to obtain a two-phase linear motor in which the manufacturing of the coil and the installation of the coil core are easy.

[Brief explanation of the drawing]

Figures 1 to 6 show a conventional linear motor, with Figure 1 being a partially sectional perspective view, Figure 2 being a side view,
FIG. 6 is a plan view. Figures 4 and 5 show one embodiment of the present invention with a linear motor.
FIG. 5 is a side view, and FIG. 6 is a partially cut perspective view showing another embodiment. 5: Iron core, 6, 8, 9: First coil - 7 = Second coil, 10.11: Shield post phase, 12: Iron core - 13
゜i5,16: first coil, 14: second coil,
17: Shield member. Agent Masuo Oiwa 1011 Figure 6 5 3rd tffl

Claims (1)

[Claims] It includes an iron core, a first coil and a second coil provided on the iron core, and an alternating current is supplied to the first coil, and an alternating current is supplied to the first coil, and an alternating current is supplied to the first coil, and an alternating current is supplied to the first coil, and
The alternating current supplied to the first coil is 90
``A two-phase linear motor configured to supply alternating current with a phase difference, characterized in that the first coil is wound in a body-wound type, and the second coil is wound in a concentric type. 2 phase linear motor.