DE1869457U - MAGNETIC CIRCUIT WITH SWIVELING ARMATURE FOR CONTACTORS OR SIMILAR DEVICES. - Google Patents

Description

"6509 ~ W / Ei -. Cie * ELEÖTRQ« MEGÄIIQII1, Paris _? France

Magnetic circuit with swivel armature for contactors or similar

..Gate directions *.

The mooring affects magnetic circuits of the type with swiveling armature, which is used to operate contactors or other similar gate directions "can be used * It is used primarily / for magnetic circuits in the French .Patent. 1 239. 41Φ "of July 17, 1959 applied, but is not limited to this application.

It is already known, generally in the magnetic circuits of Protect an air gap of a few tenths of a millimeter, which is used to prevent the sticking that occurs after switching off the excitation current only as a result of remanence of the movable armature on the fixed part of the magnetic circuit to prevent ses »A simple solution to this problem is to eliminate this air gap between. one of the! faces of the movable anchor and the corresponding .PoIflache des. immovable To attach part of the Mägnetkreis, these each other opposing surfaces then no longer rest on each other when the magnetic circuit is closed; ' However brings the progressive impact on one or the other

other investment surfaces as well as .. the lalle of Magnet « circle with swiveling armature following wear of the swivel axis rather quickly this initially existing Air gap to disappear, To remedy this, it has already been suggested to place one on one of the two surfaces mentioned To attach a non-magnetic "plate, the thickness of which corresponds to that of the desired air gap"; this plate but is difficult to attach because of its small thickness and only has a mediocre persistence in use; an accurate grinding of this plate is practically impossible, which leads to inequalities in its thickness dimension and this leads to the moving armature tilting and a hum in the magnetic circuit. '

Another already known solution to the problem consists in the interruption of the magnetic circuit at any point in its course different from the pole faces, e.g. the middle of the Magnetjoehes. Even if this solution is the one above actually suppresses the mentioned inconveniences they on the other hand the structure of the magnetic circuit more complicated, - because they forces connecting cheeks made of non-magnetic material to be provided and the number of rivets for fastening the sheets to multiply what is inevitably the magnetic Losses increased. -. ■ ".

Subject of the invention can now act against the remanence

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Air gap in a simple and permanent way on one of the two legs, a "misshapen. Magnetic circuit and at the same time" free application of the pivotable armature to the. The innovation is essentially characterized by the fact that a relatively thick plate made of non-magnetic material is attached to an attachment surface of the armature adjacent to the pivot axis of the armature notch or recess and attached by electrical welding or in any other way. This plate forms a slight projection over the rest of the contact surface of the armature in order to create the desired air gap when the magnetic circuit is closed. Because of its thickness _, which can be up to several millimeters, the plate is well suited for precise grinding, and consequently it is advantageous according to another. Characteristics of the furnace possible to design the profile of the plate so that it is easy at the end of the stroke. Tilting of the armature "causes. Which has the pole that the sticking of the armature in its pivot bearing is canceled in. Counteraction against those Forrichtungen that hold the armature there normally. - * handle allows © s unimpeded pressing the other Anlagefläche- des_ anchor to then erzielenj the corresponding leg, the magnetic circuit even if the _{Sohwenfcläger?.}

■ ** be it from the beginning ", be it as a result of wear and tear -> has some deficiency in terms of parallelism -.

Further individual pages and advantages of the innovation result from the following description of exemplary embodiments on the basis of the drawing. ". .-,

In the drawing show:. \ -.

Pig (1a, 11h) and 1c schematically show a view of an invention appropriate magnetic circuit ,, namely in the open state or in two consecutive when closing Phases. - ... : "■." ".. - ...

Hg * 2 a. Front view of the 'pivoting anchor, which a Execution form: the attachment of the non-magnetic Plate shows ..

Pig »3 one. Detail of Fig »1c on an enlarged scale, Pig »4 and 5 two more. Embodiments,

The general design of the laminated magnetic circuit shown in the drawing is already in the French Patent specification 1 239 414 of 17 '^ uIi 1959' described * However it should be emphasized that this type of construction is only an example of the possibilities to the realization that,.! inflation is chosen and that

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in no way a limitation is bealDsichtigt regard to the application, -This magnetic circuit consists ii we "sentlichen from a fixed portion magnet yoke oder.einem i ^ of general U shape und.aus, a movable part .or a pivotable. Armature 2, which is used to close the magnetic circuit when the voltage is applied to the generator coil (not shown in the figure). This coil S2. ~ Fez.tj. as well as the usual phase shift ring on the shorter of the two legs of the magnet yoke, while the other leg is connected by any suitable device to a metal plate (not shown in the figure), which serves as a carrier for the entire magnetic circuit: arrangement serves "These two legs end in the poles la and * Ib, which are ground in planes that are perpendicular to the plane of the figure and are parallel to each other." pivotable armature 2, in turn, has two contact surfaces 2a. or * 2b, which the associated two pole faces 1a or, Ib of the magnet yoke. correspond, and also has a semi-cylindrical. Curvature 2c, which represents its joint surface and for this purpose in a firmly connected to the carrier plate. Half-Ijagerpfanne 3 engages where it is normal «. ', By the action of a spring is pressed _$ which is not shown in the drawing and which can serve as a return spring for d "n anchor simultaneously.

According to the firing "is located on the separate plant area 2b of the

The anchor closest to its pivot axis _is ^:. lateral recess 2d of one or more millimeters .Tiefe attached; this recess, which is used to hold the plate | made of mimagnetic material is preferably obtained directly by means of the tool used to punch out the metal sheets of the magnetic circuit. The attachment of plates 4 to the base of the recess 2d can be done either, preferably in accordance with Property 2, by means of welding points or by means of hardite or finally by any other known means to create the desired air gap during closing of the magnetic circuit *, the platelet 4 must have a thickness which exceeds the Efefe the Off ~ recess by a few tenths of a millimeter and 2b so low Torsprung respect to the remaining portion of the armature surface. determines _s which consequently plays its role as Anlagefläche_ only through mediation, platelet 4 ^ so that the he * - *. -haltene _Iiuftspalt} which the non-magnetic plate is exposed despite the repeated blows, remains permanently, muß.das platelets course of material of sufficient hardness "be made, e.g. * B * made of stainless steel *

The one that represents an essential characteristic of hiring "Use of a relatively thick non-magnetic Plate, that is only a fraction of the relevant pole area überdecki offers a double advantage over dön vor «· '

"known solutions. First and foremost, it leads to. a ... Compression of the lines of force in the part of the contact surface that does not carry the recess .2bj · and. so, that that by welding "or soldering the plate 4 on Local short circuits generated by the recess 2d the anchors * ~ sheets without any noticeable influence on the losses in the magnetic circuit is *. On the other hand, the tile points straight because of its thickness sufficient mechanical strength on to its editing with great. Accuracy, possible. «. . : _.

latfh one further feature of the.! furnace is this property let.ztgena.nnte "advantageously exploited _t. to cause a slight tilting of the armature by means of the wafer 4, 'when this termination of the Schliesshubes.gelangt, said tilting sticking his Schwenfclagers. It is actually possible ",. to grind the surface of the non-magnetic plate 4 by means of a form grinding wheel so that. its profile is arched -iat »; z "B" by giving the plate the shape of a part of a cylinder 4a according to FIG. BjLflache Ib of the magnet yoke along a surface line of this cylinder? G <So you only need the position of the half-bearings; 3 , .which forms the'Schwenfclager, to be selected in such a way that the closing process takes place in two successive ones. Stages going on; (A) starting from its position shown in Fig. la (opening position rotates

the armature in Beinern swivel bearing ties to the moment in which the non-magnetic plate 4 is in contact with the pole face 1b of the magnet yoke, while the other contact surface has not yet come into contact with the corresponding pole face, which position is shown in FIG. 1b ι (h) beyond this intermediate position, the armature performs a tilting movement. by rolling on the pole face Ib until the contact face 2a comes to rest against the pole face, this tilting movement to cancel the sticking of the joint. 2c leads to the half-bearing anne ^ 3, and that in counteraction against; the elastic devices which normally hold the joint surface there (cf. condition is that the plane of the contact surface does not have a deficiency in the Parallelitä to the generatrices of the cylindrical lläche 4a% this condition is by the way easily observed in practice when ensure shall ensure that the two coming in embossing surfaces in one and Consequently, it becomes meaningless if the half-pan 5 itself offers an imperfection in parallelism, because its effect, after closing the magnetic circuits, ceases * .. "-.""■. ■

It is _"$ noted that the end" to the minor Schliessungshubeseintretende tilting of the armature has the consequence that the elastic means ,; which are intended for pressing the armature against its pivot bearing and their effect until then by the half-bearing pillar. 3 has been added to the anchor itself. Effect come. This results in the occurrence of a strong retraction torque, which also facilitates the lifting of the sticking of the pivotable armature when the coil excitation is interrupted * ^:

Instead of the contact surface 2a of the pivotable armature is sanded evenly in accordance with the above explanations, it can expediently according to the drawing according to a Cylindrical profile with a sufficiently large grounded Eadiuis * The simultaneous machining of the two cylindrical areas 2a and 4a offer no particular difficulty; their respective Ifantella lines are said to be the same strict Fulfill parallelism conditions as indicated above "This embodimenti was not influenced in the". least the - general effectiveness of the magnetic circuit, since the contact of the armature on the surface 1a of the yoke le « only along a cylinder surface line and not on a plane. If the position - the axis of curvature, accordingly is chosen, one can set up so that the installation line determined in this way lies on the part of the surface ta; which, of

the phase shift ring is surrounded; thereby-becomes -. . to the. Another part of the pole face created a small air gap, which favors the reduction of the humming peculiar to the alternating current "magnetic circuits." ^: lovember.1959 given- teachings »" ■. ". ■". ■ -. """■ ■ '. : ■ -. ■ "■"

It .versteht - without saying that in the arrangements described above, various embodiments is ~. can be turned _? without deviating from the area of the irfinding, the non-magnetic plate could not be on the contact surface of the pivoting armature, but on the corresponding _j; for this purpose appropriately cut out poly area _? the magnetic ^"jo_ches: be attached, or it could, in accordance Pig.-4, the platelets are precisely ground and rest against an appropriately curved projection of the 'mentioned PoIflache could Furthermore, one in accordance with I ¹ Ig -5 the platelets do not.... .. recess in a lateral from ^ but accommodate ,, in a middle notch * His profile could be ground in one of the cylinder shape or even deviating from a rotation surface shape in the same way, _z; "as .in form of a Prism, with its edge taking on the role of the plant line, which Hs then belonged to the surface lines of the cylinder »The firing is concerned

as a new kind of product -Magnetic circuits for contactors as well as any such gate direction * in which the application of the improvement described is possible.

Protection claims ι -

Claims (1)

H * // PI KV 12 - Protection claims: 1 * Magnetic circuit with a swiveling armature for doors or similar door directions where there is an air gap between the armature and the magnet yoke and at the same time a free application of the. other contact surface is seen, thereby geke η η ζ eich η et, 'that a relatively thick plate made of non-magnetic material in a notch made for this purpose on the contact surface of the armature adjacent to the pivot axis of the armature or recess and is attached by means of electret welding or in some other way *, whereby the plate forms a slight step in relation to the rest of the rope of the contact surface of the armature in order to create the desired air gap when the magnetic circuit is closed, and that this plate so is configured such that it causes at the completion of the stroke of a slightly tilted the armature, thereby under-G-egenwirkung against the gate directions, which hold the armature normally pressed, the sticking of the armature 'is lifted in its .Schwenklager up _~...: 2 »Door direction according to claim 1 _f daudroh gek e. η η ζ calibrate - η et that the area of the non-magnetic plate according to. .- - a curved, preferably after a cylindrical profile is processed, -. :. : 3 * device after. Claim 1 or 2, characterized in that g e k e η η « - shows that the other contact surface of the armature is also machined according to a cylindriseheiii profile ", . -where: where the two cylinder axes are parallel to each other »