JPS61107627A - Electromagnetic driver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electromagnetic drive device suitable for use in 11L magnetic contactors, solenoid valves, and the like.

(Conventional technology 1 For example, in a VL magnetic contactor, conventionally, the main contactor is closed by excitation of 1 square 1 μm, and opened by demagnetization.) There is a type that closes the main contact and opens the circuit at the excitation section.

(Problem to be Solved by the Invention) However, in order to maintain the closed state of the main contact in the former type, and in order to maintain the open state of the main contact in the latter type, it is necessary to constantly use the electromagnet. Electric current must be supplied, which poses problems in terms of energy conservation and safety. In addition, as a solution to this problem, a method in which the state of the main contactor is mechanically maintained by excitation of an electromagnet has also been proposed. According to an electromagnetic contactor having such a holding mechanism, the main contactor can be held in a predetermined position by energizing the electromagnet for a short time, which is advantageous for energy saving and safety. In this case, since the state of the main contactor is maintained mechanically, a reset mechanism is required, which complicates the structure and increases the overall size.

In addition, in the conventional electromagnetic contactor described above, the electromagnet has good magnetic resistance, and therefore a large current is required to excite the electromagnet and obtain the magnetomotive force that brings the main contact into a predetermined state. The magnetomotive force is suppressed to the necessary minimum. For this reason, there is a problem that the opening/closing operation of the main contactor is slow.

The disadvantage of the above-mentioned magnetic contactor is that it operates on the same driving principle! The same problem occurs with the f and m valves, but in this case, the above-mentioned disadvantage becomes significant especially when the pressure of the fluid flowing in the flow path is high.

□The purpose of the present invention is to solve the above-mentioned problems)1
The object of the present invention is to provide an electromagnetic IA device that is appropriately configured to be energy-saving and safe, and to operate at high speed.

(Means for Solving the Problems) The electromagnetic drive device of the present invention includes a movable member made of a magnetic material that can be displaced between first and second magnetic poles, and nil k! , vJl ftu tst and said second magnetic pole 1i (J); and permanent stone means for generating a magnetic flux that magnetically attracts a second magnetic pole, and fill means for controlling the magnetic flux through said first and second magnetic poles, said coil means being selectively pulsed. The present invention is characterized in that the movable member is selectively displaced to the 116th and second magnetic poles by supplying a current of .

[Function] In the above configuration, the movable member is connected to a movable contact constituting a main contact in, for example, an i-magnetic contactor, and is connected to a valve that opens and closes a flow path in a solenoid valve. The movable member defines a closed loop magnetic path with the yoke means at the first and second magnetic pole positions, respectively, and the magnetic flux from the permanent magnet means passing through the magnetic circuit causes the movable member to move to the first and second magnetic pole positions. They are each effectively attracted and held, and the attraction and holding force at each position is adjusted by the coil means.

(Example) FIG. 1 shows a first embodiment of the present invention.

In this example, it is applied to an electromagnetic contactor, and the movable member l made of a magnetic material has first magnetic poles 2a, 2b and a second magnetic pole aa.
, ab.

The first magnetic pole 2EL, 2b and the second magnetic pole 3a.

8b is attached to the open end of the U-shaped yoke 4 at a distance and facing each other, and with the movable member l in contact with the first magnetic poles 2a and 2b, these are possible! IvJ W, material 1, first magnetic poles 2a, 2b, and yoke 4 form a closed loop magnetic path, and movable member 1 is second CLq pole 3a.

8b, a closed loop magnetic path is formed from the movable member 1, the second magnetic poles 3a, 3b, and the yoke 4. A permanent magnet 5 is attached to the yoke between the opposing sides of the magnet, thereby moving the movable member 1 through the yoke 4 to the first 1000 mm.

2b and the second magnetic poles aa, ab, respectively, and a coil 6 is wound around one side between the permanent magnet 5 and the second Mi41a, ab, Connecting the yoke 4 to the first magnetic poles 2a and 2b
And the magnetic flux acting on the second magnetic poles aa and ab is controlled.

First chisel 2a, 2b 1lI of movable member 1
One end of the movable part 7 made of non-magnetic material is attached to ll,
This movable part 7 is passed through a guide hole 9 formed in a lid 8 made of a non-magnetic material provided on the first magnetic poles 2a and 2b, and a movable contact 11 is attached to the thin end of the guide hole 9 through an insulating member 10. , the movable contact 11 is made to move toward and away from the fixed contact 12 according to the displacement of the movable member 1, and the movable part 7 between the movable member 1 and the lid 8 has a -@ part attached to the lid 8. A coil spring 13 made of a non-magnetic material is fixedly wound around the coil spring 13. Also,
On the second magnetic pole aa, ab side of the movable member 1, a coil spring 15 also made of a non-magnetic material is provided with one end fixed to a fixed member 14 made of a suitable non-magnetic material. coil spring 1
3 is the first magnet &2a of the movable member 1 by the permanent magnet 5 when the coil 6 is not energized.

2b, and excite the coil 6 to reduce the magnetic flux of the permanent magnet 5 acting on the movable member 1 to fC.
When it is magnetized, move the flexible member 1 away from the first magnetic poles 2a, 2b and move it to the second magnetic pole beyond the midpoint between the first magnetic poles s+a, 2b and the second magnetic poles aa, ab. magnetic pole aa,
It is configured so that it can move to the ab side. Similarly, when the coil spring 15 is not energized, the permanent magnet 5
It is possible to effectively maintain the contact state at the second magnetic poles aa and ab of the movable member 1 and move the coil 6 on the moving base d! 1
l) When the magnetic flux of the permanent magnet 5 acting on the three members 1 is reduced, move the movable member 1 to the second magnet 3a, 3b and separate it from the first 6R r2a, 2b and the second magnet. magnetic pole aa
, 1st magnet over 1 point for ml of cattle with ab & 2 a
, 2 b Constructed so that it can move up to Tsukuda 1.

The operation of the X magnetic contactor σ) shown in FIG. 1 will be explained below. The state shown in FIG.
and the movable contact 11 are separated and the electric circuit is interrupted. In this state, the coil 6 is in a non-excited state, and the movable member 1 is rotated by the permanent magnet 5 against the force of the coil spring 15. It is held in effective contact with the two magnetic risers 3a and 3b. Now, as shown in FIG. 2, if a pulsed main component is supplied to the coil 6 in order to demagnetize the magnetic flux generated by the permanent magnet 5, then immediately a pulsed current with the direction of the current reversed is supplied. , first, due to demagnetization, the force of the coil spring 15 overcomes the magnetic attraction force of the permanent magnet 5, and the movable member IG
et The second 1jHk a by the force of the coil spring 15
a + 3 b to 1st (7') a? i2 a, 2
t) side, and then a pulsed current in the opposite direction is immediately supplied to the coil 6, and the magnetic attraction force of the movable member 1 by the permanent magnet 5 is promoted, so that the movable member 1
The movable contact 11 is quickly attracted to and comes into contact with the first magnetic poles 2a and 2b against the force of the coiled spring 18, and as a result, the movable contact 11 comes into contact with the fixed contact 12 and the electric circuit is closed. This closed state of the electric circuit is effective because the movable member 1 is held in contact with the first magnetic poles 2a, 2b by the permanent magnet 5 against the force of the coil spring 13 after the fill 6 is in the non-excited state. will be maintained. Thereafter, when the current shown in FIG. 2 is supplied to the coil 6 again, the movable member 1 is moved to the first position (hMi!) by the same operation.
#2 a +' 2 b to second Mi pole s a ,
8 b, and the electrical circuit is cut off.

Therefore, in this embodiment, by supplying a pulsed current as shown in FIG. 2 to the coil 6 only when the electric circuit is closed or interrupted, the electric circuit can be automatically and quickly closed or interrupted. be able to. Furthermore, since the 76 closed loop paths formed by the movable member 1 and the yoke 4 have low magnetic resistance, the capacity of the permanent magnet 5 can be reduced, and the control of the magnetic flux by the fill 6 can also be reduced. 1
T. It is very easy to do.

FIG. 8 shows a second practical example of the present invention.

In this example, it is applied to a solenoid valve, and the movable member 21 made of a magnetic material has first magnetic poles 22a, 22b and a second magnetic pole. #2
It is disposed so as to be displaceable between aa and 23b.

The first magnetic poles 22a, 22b are integrally formed with the first yoke 24 in the case of the main body (D1), and the movable member 21 is connected to the first magnetic pole 22a, 22b.
a, 22b, these movable members 21
, the first IM pole 2a.

22b and the first yoke 24 form a closed loop magnetic path. Similarly, the second magnetic pole 23a.

28b can be formed integrally with the second yoke 25! lv]
These are possible while the evil material 21 is touching the second magnetic poles 23&, 23b! 1IIJ member 21, second Sunaya (2
3a, 23b and the second yoke 25 form an open loop magnetic path. A first permanent magnet 26 is attached to the first yoke 24 between its opposite sides, thereby causing the first
The movable member 21 is moved through the yoke 24 of the 117th) magnetic field. 2
2a, 22b, and the first permanent magnet 26 and the first magnetic poles 22a, 2
A first coil 27 is wound around one side between the first yoke 24 and the first yoke 24 to control the magnetic flux acting on the first magnetic poles 22a and 22b. Similarly, a second permanent magnet 28 is attached to the second yoke 25 between its opposing sides, and the movable member 28 is thereby
1 is the second magnetic pole 28a.

23b so that it can be magnetically attracted and held, and the permanent magnet 28 of @2 and the second a1 pole 23a.

A second coil 29 is wound on one side between the coil 23b and the coil 23b.
Then, the second magnet 21a passes through the second yoke 25.

The magnetic flux acting on 23b is controlled.

One end of a movable part 80 made of a non-magnetic material is attached to the first magnet &22a, 22b side of the movable member 21, and a lid made of a non-magnetic material provided on the movable part 30t-first 7il &22a, 22b. The guide hole 32 formed in a1 is penetrated, and the valve 33 is attached to the other end, and the valve 83 is moved toward and away from the opening 35 of the flow path 84 according to the displacement of the movable member 21, and the opening 85 is closed by kneading. so that it opens and closes. Further, between the flexible ηflJR material 21 and the lid 81, a coil spring 36 made of a non-magnetic material is wound around the movable part 30, with one end fixed to the lid 31. Similarly, the second magnetic field of the movable member 21! On the sides 28A and 23b, a coil spring 38 made of a non-magnetic material is provided with one end fixed to a fixing member 37 made of a suitable non-magnetic material. The coil spring 36 is connected to the first coil 27
Under non-excitation, the first magnets Ik22a, 22b of the movable member 21 by the first permanent magnet 28 resist the spring force and the pressure of the fluid flowing out from the opening 35 of the flow path 84.
The contact state of the first coil 2 is effectively maintained, and the first coil 2
7: When the magnetic flux of the first permanent magnet 26 acting on the movable member 21 is demagnetized by excitation, the QJ a material 21
are spaced apart from the first magnetic poles 22a, 22b so that they can be moved to a position where the magnetic attraction force of the second permanent magnet 28 acts. Further, the coil spring 38 effectively maintains the contact state between the second magnetic poles 23a and 28b of the movable member 21 by the second permanent magnet 28 against the spring force when the second coil 29 is not energized. , and when the second coil 29 is excited to make the magnetic flux of the second permanent magnet 28 acting on the movable member 21 f2, the movable member 21 is separated from the second magnetic poles zaa and zab and 1fI so that it can be moved to a position where the magnetic force by the first permanent magnet 26 is applied! 1.

Hereinafter, the operation of the solenoid valve shown in No. 8 will be explained.

The state shown in FIG. 3 shows a state in which the opening 85 of the flow path 84 is open, and in this state, the second coil 29 is in a non-excited state, and the movable member 21 is connected to the second permanent magnet 28.
The coil springs 38 against the force of the second magnetic pole 23F.
L, 28b is effectively held in contact. Now, when a pulsed current is supplied to the second coil 29 to demagnetize the magnetic flux caused by the second permanent magnet 28, the force of the fill spring 88 against the movable member 21 is caused by the magnetic attraction by the second permanent magnet 28. Overcoming the force, movable member 21G: j coil spring 88
The force causes the second magnet to move away from 23a and 23b and toward the first magnet and 22a and 22b. In this way, the movable member 21 is the 117th) magnetic pole 22a.

When the movable member 21 is displaced to the 22b side, the magnetic attraction force by the first permanent magnet 26 acts on the movable member 21, and as a result, the movable member 21 absorbs the spring force of the coil spring 36 and the pressure of the fluid flowing out from the opening 35. The first IB pole 22 &, f
12b, and the opening 35 is closed by the valve 88. When a pulsed current is supplied to the first coil 27 to demagnetize the magnetic flux generated by the first permanent magnet 26 while the opening 35 is closed, the force of the coil spring 86 against the movable member 21 is increased by the force of the coil spring 86 against the movable member 21. Overcoming the magnetic attraction force by the permanent magnet 26, the movable member 21 is separated from the first magnetic poles 22a, 22b by the force of the fill spring 36 and moved to the second magnetic pole.
The coil spring 38 is displaced toward the magnetic poles 2aa and 2ab, and the magnetic attraction force by the second permanent magnet 28 acts on the coil spring 38.
The second MI pole 21a, 281) is quickly attracted and held against the spring force, and the opening 35 is opened.

Therefore, in this embodiment, the first coil 27 and the second coil 29 are configured to demagnetize the magnetic flux caused by the first permanent magnet 26 and the second permanent magnet 28 that act on the movable member 21, respectively. By selectively supplying pulsed current, opening and closing of the opening 85 can be performed automatically and quickly. Further, since the closed loop magnetic path formed by the movable member 21, the first yoke 24, and the second yoke 25 has a low magnetic resistance, the first
, the capacity of the second permanent magnets 26, 28 can be reduced, and the magnetic flux by the first and second coils 27, 29 can be easily controlled with a small current.

FIG. 4 shows an eighth embodiment of the present invention.

In this example, in the electromagnetic drive device shown in FIG.
between the magnetic poles 2a, zb and the movable member 1, one end is fixed to the first magnetic pole 2a, zb, respectively, the other end is in contact with the movable member 1, and the magnetic permeability is relatively small, and It is provided with leaf springs 41a and 41b made of thin magnetic material, and the other configuration and operation are the same as those shown in FIG. The first σ)rj! Since the fringing magnetic flux in 14ik2a and 2b can be reduced, the movable member 1
It is possible to relax the initial conditions when adsorbing from the second magnetic poles aa, 3b to the first magnetic poles 2a, 2b, and by kneading, the movable member l is moved to the 1st σ) IiB rod 2 with a smaller excitation current.
It can be adsorbed to a and 2b.

Note that the present invention is not limited to the above-mentioned example, and can be modified or changed in many ways.

For example, the configuration shown in the first factor can be applied to a solenoid valve, and the configuration shown in FIG. 3 (σ) can also be applied to an electromagnetic contactor. In addition, in FIG. 1, it is also possible to use gravity to move one of the movable members 1 (σ), and eliminate the coil spring acting between them. Historically, in Figure 3, a pulsed current is applied to the first and second coils 27 and 29 so that one is demagnetized and the other is magnetized, either at the same time or with a slight delay in the magnetization. It is also possible to displace the movable member 21 by supplying
No.S pole 22a, 22b from 2nd (7) vFi &
23a.

The movable member 21 can also be moved by supplying pulsed currents that increase magnetization to the second coil 29 when moving to 2ab, and to the first coil 27 when vice versa. Further, in the m-configuration shown in FIG. 8, the coil springs 86 and 88 can be omitted. Furthermore, the first
In the figures and FIG. 3, the coil that controls the magnetic flux acting on each magnetic pole can be wound at any position on the yoke.

In addition, the plate springs 41a and 41bG shown in FIG. 4 are placed between the movable member 1 and the second magnetic poles aa and ab, or between the movable member 1 and the second magnetic poles aa and ab, instead of between the first magnetic poles 2a and 2b and the movable member 1. Alternatively, it may be provided in the same manner as shown in FIG.

Furthermore, the present invention is not limited to the above-mentioned electromagnetic contactors and electromagnetic valves,
It can be widely applied as a driving load for reciprocating members.

[Effects of the Invention] As described above, in the present invention, the movable member is selectively displaced to the first magnetic pole and the second magnetic pole by supplying a pulsed current to the coil means. , it is possible to save energy and improve safety, and since it does not require a mechanical reset mechanism, it can be made small and inexpensive. In addition, each state of the movable member is held by the magnetic flux of the permanent magnet means that follows the magnetic path of the closed loop that includes the movable member, so each state can be stably maintained, and the magnetic path of the closed loop can be maintained stably. Since the magnetic resistance can be reduced, the excitation S current to the coil means can also be reduced, and moreover, the flexible FF, lJW material can be driven quickly and reliably.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a current waveform diagram supplied to the coil shown in FIG. 1, and FIG. 8 is a sectional view showing a second example of an actual kite of the present invention. FIG. 4 is a sectional view showing a third embodiment of the present invention. 1... Movable member 2a, 2b... First magnetic pole aa, ab... Second magnetic pole 4... Yoke 5... Permanent magnet 6... Fill 7... Movable part 8. ...Lid 9...Guide hole
10... Insulating member 11... Movable contact 1
2... Fixed contacts 13, 15... Coil spring 14
...Fixed member 21...Movable member 22a,
22b... First magnetic pole 23a, 23b, - Second magnetic pole 24... Yoke of il 25... Second yoke z6... First permanent magnet 27... First coil 28... Second permanent magnet 29... Second coil 3
0...Movable part 31...Lid 32...Guide hole 33...Valve 34...Flow path
85 mountain openings 36, 38... coil spring 37
... Fixed members 41a, 41b - ... Leaf springs Fig. 1 Fig. 2

Claims (1)

[Scope of Claims] 1. A movable member made of a magnetic material that can be displaced between first and second magnetic poles, a closed loop magnetic path passing through the first magnetic pole via the movable member, and a closed loop magnetic path passing through the first magnetic pole and the second magnetic pole. yoke means for selectively defining a closed loop magnetic path through the magnetic poles; permanent magnet means for generating magnetic flux through the yoke means to magnetically attract the movable member to the first and second magnetic poles; coil means for controlling magnetic flux passing through the first and second magnetic poles, the movable member being selectively applied to the first and second magnetic poles by selectively supplying a pulsed current to the coil means; An electromagnetic drive device characterized in that it is configured to cause a displacement. 2. The yoke means includes a common yoke having the first and second magnetic poles, one permanent magnet is connected to the yoke as the permanent magnet means, and one coil is wound as the coil means. An electromagnetic drive device according to claim 1, characterized in that: 3. The yoke means includes a first yoke having the first magnetic pole and a second yoke having the second magnetic pole separated from each other.
yokes, and these first and second yokes are provided with first and second yokes, respectively, as the permanent magnet means.
2. The electromagnetic drive device according to claim 1, wherein permanent magnets are connected to each other, and first and second coils are respectively wound as said coil means.