JPH02197105A - Polarized electromagnet - Google Patents

Abstract

PURPOSE:To increase magnetic flux with a simple constitution, and to intensify attracting force by a method wherein a tilted pole-face, which is tilted in the working direction of a movable wire, is provided on each opposing surface of a yoke and a contact in a freely surface-contacting manner. CONSTITUTION:A tilted pole-face, which is inclined in the moving direction of an iron core 4, is formed in such a manner that each opposing surface between a magnetic pole piece 8 and a contact 6 of a polarized electromagnet, composed of a permanent magnet 1, a pair of yokes 2 with which the permanent magnet 1 will be pinched, the contacts 6 and 7 located at the end section of the yokes 2, a movable iron core 4 which moves in the opposing direction of the contacts 6 and 7, will be provided in a freely surface-contacting manner with each other. By the above-mentioned inclination, magnetic flux is increased by the enlargement of the area of magnetic pole with a simple constitution and also reduction of magnetic resistance, and the attracting force of the title magnet can be intensified.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a polarized electromagnet.

[Conventional technology]

FIG. 8 shows a conventional example. In other words, this polar electromagnet is
A permanent magnet 50, a pair of yokes 51, 52 that sandwich this permanent magnet 50 in the magnetizing direction, and an armature 53, 54 between both ends of the pair of yokes 51, 52, so that the opposite ends of the magnet 50 are arranged in opposite directions. The movable iron core 55 is provided with a movable iron core 55 that can be operated in the same direction, and a coil 56 that allows the movable iron core 55 to be inserted in the direction in which the movable iron core 55 can be operated.

[Problem to be solved by the invention]

In such a polar electromagnet, as shown in FIG. 9, a movable frame 57 is connected to a movable iron core 55, a movable contact 58 is provided on the movable frame 57, and the movable contact 58 is opposed to a fixed contact 59.
Applicable to 1iff contactors, etc.

However, in order to increase the sensitivity of the device, increase the operating speed for the opening and closing performance of the contacts, increase the life span, and improve reliability, the polarized electromagnet needs to have sufficient attractive force.

Therefore, it is an object of the present invention to provide a polarized electromagnet that can increase the attractive force.

[Means to solve the problem]

The polarized electromagnet of the present invention includes a permanent magnet, a pair of yokes that sandwich the permanent magnet in a magnetizing direction, and an armature between at least one end of the pair of yokes, and the polarized electromagnet has an armature located between the opposite ends of the one end. a movable iron core that can move in the direction in which the movable iron core can move, and a coil that is inserted through the movable iron core in the direction in which the movable iron core can move, the coil being able to make surface contact with each opposing surface of the yoke and the armature, and that can move in the movement direction of the movable iron core. It is characterized by having a tilted magnetic pole surface that is tilted with respect to the magnetic field.

[Effect]

According to the configuration of the present invention, since the opposing surfaces of the yoke and the armature have inclined magnetic pole surfaces that can make surface contact with each other and are inclined with respect to the operating direction of the movable iron core, the magnetic pole area can be increased with a simple configuration. Since the resistance can be reduced, the magnetic flux can be increased and the attractive force can be increased.

〔Example〕

A first embodiment of this invention will be described based on FIGS. 1 and 2. In other words, this one-polar magnet is a permanent magnet l
, a pair of yokes 2 and 3, a movable iron core 4, and a coil 5.

The two permanent magnets l have a flat plate shape and are magnetized in the thickness direction.

The pair of yokes 2.3 sandwich the permanent magnet 1 in the magnetization direction. The two yokes 2 have an abbreviated shape and are located on the coil 5 side, and one end is located at the end of the coil 5 as a magnetic pole piece 8. The two yokes 3 are substantially U-shaped and are located on the opposite side from the coil 5, with both ends serving as rIi1 pole pieces 9 and 10 located at both ends of the yoke 2 and the coil 5.

The movable iron core 4 has an armature 6 between one end of the pair of yokes 2.3, that is, between the magnetic pole pieces 8 and 9, and is movable in directions opposite to each other. In this embodiment, the armature 6 of the movable iron core 4
An armature 7 is also provided at the opposite end of the yoke 2 so that it can enter between the other ends of the yoke 2.

The coil 5 allows the movable iron core 4 to be inserted in a movable direction. The coil 5 is wound around the coil frame 11, and the coil frame 1
A movable iron core 4 is slidably supported in a hollow portion 12 of 1.

The opposing surfaces of the yoke 2.3 and the armature 6 have oblique magnetic pole surfaces 13.13' that are capable of making surface contact with each other and are inclined with respect to the operating direction of the movable iron core 4.

The inclined magnetic pole faces 13, 13' are formed by bending both ends of the magnetic pole pieces 8, 9 and the armature 6 so as to be inclined with respect to the moving direction of the movable iron core 4. Note that the return spring is omitted.

This polarized 'g1 magnet is stabilized when the armature 6 is attracted to the magnetic pole piece 8 by the permanent magnet 1 in a non-excited state in which the coil 5 is not energized. When the coil 5 is energized and energized so that the magnetic flux flows in the opposite direction to the magnetic flux of the permanent magnet l flowing through the movable iron core 4, the magnetic flux between it and the magnetic pole piece 8 is reduced, the attractive force becomes smaller, and the magnetic flux between the magnetic pole piece 9 and the magnetic pole piece 9 is reduced. The movable iron core 4 operates so that the magnetic flux increases, the attractive force increases, and the armature piece 6 is attracted to the magnetic pole piece 9 side.

According to this embodiment, since the opposing surfaces of the yokes 2 and 3 and the armature 6 have inclined magnetic pole surfaces 13 and 13' which can make surface contact with each other and which are inclined with respect to the operating direction of the movable iron core 4, ,
With a simple configuration, the magnetic pole area can be increased and the magnetic resistance can be decreased, so the magnetic flux can be increased and the attractive force can be increased.

In other words, as shown by the imaginary line in Fig. 2, the conventional magnetic pole area S
, gamb length l, magnetic resistance R=l/μ. It becomes S. μ. is the 1itff rate in air.On the other hand, when the magnetic pole face 13.13' is tilted at an angle θ as shown by the solid line in FIG. 2, the magnetic resistance R1=j! cnsθ/(μgs/wθ
) = ♂θ/μ, S. Therefore, when it is tilted, the magnetic resistance increases by 1zθ compared to the conventional case. In other words, the more it is tilted, the smaller the magnetic resistance will be.

A second embodiment of the invention is shown in FIG. In other words, in this bridge electromagnet, the yoke 2 is U-shaped, and the yoke 3 is L-shaped.
The armature 7 is omitted, and in the non-moving L11, the movable iron core 4 is attracted to the magnetic pole piece 9 side and stabilized.

The rest is the same as the first embodiment.

A third embodiment of the invention is shown in FIGS. 4 and 5.

That is, in this laminated magnet, the armatures 6 and 7 at both ends of the movable core 4 are located between both ends of the yoke 2.3, and the chevron-shaped magnetic pole portion 14 is placed outside the armature 6 of the movable core 4. By forming an inclined recess 15 in the yoke 3 corresponding to the chevron-shaped magnetic pole portion 14, an inclined 6 is formed on these surfaces.
An n-pole surface 1313' is formed, and when the armature 6 contacts the magnetic pole piece 9 of the yoke 3, the chevron-shaped magnetic pole part 14 simultaneously
and each inclined n-pole surface 13, 13' of the inclined recess 15 are in contact with each other.

The rest is the same as the first embodiment.

A fourth embodiment of the invention is shown in FIGS. 6 and 7.

In other words, this polarized magnet has both ends of the armature 6 connected to the magnetic pole piece 9 of the yoke 3 instead of the chevron-shaped magnetic pole part 14 of the third embodiment.
The inclined magnetic pole face 13 is inclined to the side, and
Inclined magnetic pole surface +3' that contacts the inclined magnetic pole surface 13 of fi piece 9
It was formed by cutting and raising.

The rest is the same as the first embodiment.

〔Effect of the invention〕

According to the polarized electromagnet of the present invention, since the opposing surfaces of the yoke and the armature have inclined magnetic pole surfaces that can make surface contact with each other and are inclined with respect to the operating direction of the movable iron core, the magnetic pole area can be reduced with a simple configuration. Since the magnetic resistance can be increased and the magnetic resistance can be decreased, there is an effect that the magnetic flux can be increased and the attractive force can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the first embodiment of the present invention, FIG. 2 is an explanatory diagram illustrating the magnetic resistance in the state of contact between the armature and the magnetic pole piece, and FIG. 3 is a sectional view of the second embodiment. , FIG. 4 is a sectional view of the third embodiment, FIG. 5 is an exploded perspective view of the main part thereof, FIG. 6 is a sectional view of the fourth embodiment, FIG. FIG. 8 is a perspective view of a conventional example, and FIG. 9 is an explanatory diagram of an example applied to an electromagnetic contactor. 1... Permanent magnet, 2.3... Yoke, 4... Movable iron core, 5... Coil, 6.7... Armature, 8. 9
．． 10...Magnetic pole piece, 13.13'...Grand magnetic pole face 1...Permanent magnet 5...Coil\4 Fig. 1 Fig. 2r'71 - Fig. Fig. Fig. Fig. Fig. Fig. Fig. figure

Claims (1)

[Claims] a permanent magnet, a pair of yokes sandwiching the permanent magnet in a magnetizing direction, a movable iron core having an armature between at least one end of the pair of yokes and movable in a direction opposite to the one end; a coil inserted through the movable iron core in the movable direction, and has inclined magnetic pole surfaces that are capable of surface contact with each other on opposing surfaces of the yoke and the armature and that are inclined with respect to the operating direction of the movable iron core. A polar electromagnet characterized by: