DE371999C - Bracing of the motor braces in multi-phase measuring devices according to the Ferraris principle - Google Patents

Description

Bracing of the motor travels in multiphase measuring devices based on the Ferraris principle. For reasons of economy and uniformity or standardization, it is desirable that a Ferraris device equipped with only two motor systems (such as d, h or dl, hl, Fig. 2) and sufficient for measuring multiphase current, in particular a motor meter in which those two motor systems are somehow arranged in a common housing a, without changing the latter or that whole basic device, by simply adding a third similar motor system d2, h2 (Fig. 2) without much further ado, also for measurements in z. B. three-phase systems with fourth or neutral conductor, can be used.

A construction that is advantageous not only in economic terms, but also in technical, normalizing terms is z. B. the one shown in Fig. I and 2, where simply above the single-phase measuring device d, h, g, e, m, p, which forms the basic type, remains unchanged and shown in the lower half of Figs. I and 2, a second similar motor system dl , hl, g1, f etc., lying in the same plane, is installed in a correspondingly elongated housing a. This arrangement of two motor systems is known to be sufficient for measuring two- and three-phase current, etc., the latter without a neutral conductor, and leaves a lot of free space in the upper part of the housing for any additional equipment such. B. Maximum pointer, double tariff counters and the like. More, which is particularly useful when using such devices in conjunction with current and voltage converters for measuring high-voltage currents at high power.

Instead, you can, possibly-retrospectively, in such a, the multi-phase device forming the basis, clearly easy and without great fuss, that third motor system d2, h2 by simply adding before the second upper one dl, hl, acting on the now common anchor g1, after which this simple, neither a new, enlarged housing nor a conversion of the lowest single-phase device In addition to accessories P etc., required measuring device also for four-wire three-phase systems or Sufficient wherever three motor systems are required. However, this third one would have external motor system does not have sufficient static strength, neither in with regard to torsion nor with regard to vertical tension or pressure, if at this light, simple standard design for reasons of standardization, etc. are recorded target.

It could be z. B. by arranging a stiffening frame clamped under all four bolt nuts b1 ', b a sufficient strength of the whole can be achieved. However, since the outer third motor system d2, h2 must be removed or inclined at least sufficiently far for the purpose of removing the double armature g, g1, a loosening of the lower bolt nuts b, b would also be necessary for this, whereby, as well as through the stiffening frame itself, that double anchor and other parts would easily be exposed to the risk of damage.

The present invention, described in more detail below and illustrated by an example in Figs. B. dl, hl or d2, h2, one behind the other on two common light carriers, e.g. B. stud bolts b1, b1, however, a third motor system d, h is attached separately, and consists in that between the composite element, z. B. the composite bridge f of the outer motor system d2, h'2 and the composite element, z. B. the composite frame e of that separate engine system d, h, two struts v, v are arranged, for the purpose of maintaining this lightweight design, the desired position of that outer engine system d2, h2, in particular that of its working air gap y (see Fig. I below ) to secure against the armature g1 and also the position of the upper bearing k, as well as to such that external motor system d2, h2, z. B. to remove the anchor g, g1, without the latter z. B. by loosening the attachment of the single motor system or of its nuts b, b endangered.

As can be easily seen from Fig. I to 3; is thereby named z. B. a twisting of the carrier or stud bolts b1, b1 and thus the pole air gap Y Z. B. when tightening the bolt nuts b1 ', b1' prevented as much as possible, as well as an otherwise possible disturbance of that pole position y as well as the positions of the upper bearing k and of the sub-support q, in particular their mutual spacing as a result of any curvatures the base plate a z. B. due to improper assembly or other tension, etc.

In addition, the following meanings in the drawing: a a rear wall or so-called base plate carrying the carrier or stud bolts; b, b1 main studs supporting the engine systems; b ', b1' their detachable nuts; c, cl approximately arranged auxiliary studs; c2 like. an extension bolt screwed onto cl instead of a nut; cl, c2 'their detachable nuts; d, dl, d2 tension iron; d ', d2' (Fig. i) their cross-connecting legs or so-called throttle bridges; e a composite element of the motor iron d, h in the form of a composite frame with two arched arms e ', e' encompassing the Ani kerscheibe g, two fastening eyes e1, e1 (Fig. i), two approaches or horns e4 as counter carrier, etc., a magnet carrier c2, and an angle tab e3 which presses the main current iron h against the tension iron d or their common butt joints such as i, i (Fig. i); f, f composite elements of the further motor iron in the form of punched composite bridges, f1 (Fig. 4) their fastening eye, f 2 their lateral stiffening angle around the recess u for the armature disk, f 3 their angled lobes For the purpose like it; g, g1 armature disks, e.g. B. made of aluminum; h, hl, h2 are the main stream irons with z. B. two broad main current coil poles (Fig. I above), a narrow, unwound center pole opposite the center pole of the tension iron and two long outer legs, each reaching as far as the butt joints i, i (Fig. I) on the tension iron d2 as a magnetic return path, in which If the composite elements e or f z. B. made of antimagnetic material instead of iron, as otherwise required, but of course can still consist of the cheaper iron; k (Fig. 2) an upper bearing bracket for anchor g1 that is attached to the girders or stud bolts b1, b1 and can best be folded up; m (Fig. 2) a common brake magnet; ya (Fig. 2) the anchor axis; o (Fig..l) the hole in the eye f1 for the stud bolts and possibly an insulating bush is sufficient. 0l, o2 raised punched threaded eyes for the fastening screws r, y1 of the main flow or. of the tension iron, o3 (Fig. 2 and 4) simple or possibly threaded holes in the side angle f 2 of the composite bridge, for fastening the struts or possibly, if not binding, of clamps or similar items, P (Fig. 2) 1 a Counter of the usual type; q (Fig. 2) a common washer bolt for anchor g, g1; r, y1 screws for fastening the main current or tension irons to their composite elements e, f; r2 fastening screws i of the struts v on the one hand on the composite elements f, f 1; y3 fastening or securing screws of the same on the other hand; r4 (Fig. 2) a possibly arranged locking pin through f 2 and v; s (Fig. 2 and 3) over the tapered part of the stud bolts b1, b1 pushed pipe sockets as spacers between the two motorized iron systems, and at the same time as a pivot bearing of the foldable upper bearing k attached to them; t (Fig. 2) an insulating tube possibly arranged for the latter on s; t1 (Fig. i left) an insulation that electrically interrupts the struts v around the threaded bolt of the post c3; zs (Fig. 4.) a recess in the composite bridge f as a passage for the armature disk; v, v the struts, v '(Fig. 2) their fastening eye, which may be arranged at one end; x (Fig. 2) Free space between the base plate a and the main stream iron h or the composite bridge f.

Fig, r is a front view of the motor systems, each with different composite elements e and f, the attachment e4 of the composite frame e and the post c3 together with insulation t1, partly in section. The two armature disks together with the shaft, counter, upper and lower bearings and the brake magnet (cf. these parts g, g1, n, p, k, q; m, Fig. 2) have been omitted for the sake of clarity; likewise the front nuts of the stud bolts (cf. b ', c'',b1', c2 ', Figs. 2 and 4) and some other individual parts of such Ferrari devices that are not considered here, such as B. a possibly existing pointer, a scale, directional springs and the like. The base plate a is indicated only partially. Fig. 2 is an almost complete side view of a 1V multi-phase motor meter with three motor systems together with all those parts missing in Fig. Fig. 3 is a view of the whole (Fig. I) from above, the housing a in cross section (through cl), the post fastening, c3 on the left, indicated by dashed lines, but again without armature plates, etc. as in Fig. I. Fig. 4 is a single representation of a composite bridge f, seen from the left side, right from the front, and below it from above.

Of course, the struts v z. B. each made in one piece with the composite bridges f, f or as a continuation of their side angle f 2 and can easily be attached by means of a screw r3 at any point of the composite frame e, z. B. on its side surfaces (Fig. 2). However, in order to be able to precisely adjust the position of the outer motor system d2, A2 in relation to the position of its poles y to the armature g1 before the struts v, v are finally fastened, one of the fastening holes for the screws y3 would have to be awkward afterwards during assembly the meter parts are drilled, which, as is well known, would require an undesirable amount of time, inconvenience and costs in mass production. Or instead, the most precise execution of all the parts in question would be required, so that the poles y always easily come into the exact position relative to the armature gl, which, however, would again be expensive.

One embodiment of the strut therefore consists in that the struts v, v are each provided with an eye v '(Fig. 2), which is attached to a motor system d, lz, e.g. Side surfaces of its composite frame e (Fig. 2) attached, but best z. B. on a matching neck (Fig. I left) of a post c3 and is only secured by means of that screw y3, while on the other hand, the struts v, v with initial slack, that is, displaceable by a small amount (e.g. larger holes o3 in f2, Fig. 2) are riveted, electrically welded, or rigidly attached to the other motor system d2, h2 by means of screws r2, for the purpose of initially forcing the outer motor system d2, h2 into the appropriate position or direction when they are attached, and then first to be able to fix that connection r2 with the struts, in particular before the pole air gaps y are parallel and symmetrical to the armature disk g1, after which that connection point y2 can remain permanently fixed, and in the case of the removal of the outer motor system d2, A2 only those eyes v 'der Strives are to be triggered, or guided by them, all parts after being reinserted easily take up that mutual position once they have been set.

In the case of screws y2 or rivets, this fastening point of the struts v, v can be permanently fixed after or before the final setting and fastening, possibly by one or more locking pins r4 (Fig. 2), especially in the event that this fastening is unnecessarily solved by ignorant people and that previous setting is lost as a result.

Especially with multi-phase motor meters for higher voltages, e.g. B. over 25o volts, it is known that it is desirable that the individual motor systems or iron against each other and thus from the base plate a are particularly isolated, such. B. by the bolt insulating washers indicated in black in Fig. I to 3 in front of and behind the motor systems, as well as the insulating bushings visible around bolts c2, b1, b1, c, b, b in Fig. and main current windings in addition to their IsolierIpulen - additionally isolate against a short circuit with the housing a or against an earth fault, as well as against each other. However, due to the struts v, v the latter additional insulation of the two motor systems connected by them would be lost.

It is therefore expedient that an electrically separating insulation is inserted in each of the struts v, v at one point, possibly z. B. at a point of separation of the struts v, v themselves, for the purpose of keeping the motor systems statically connected by the latter electrically isolated from one another. So z. B. could be the struts v, v of the composite bridges f 2 together with the screws y2 in the usual way by means of an insulating plate, shards and bushes (z. B. similar to those of the posts e3 Fig. I) isolated by t 'from e4, where but that desired lot or adjustability would hardly be possible or at least very cumbersome and expensive, and z. B. a locking pin y4 (Fig. 2) would also have to be isolated or made of insulating material. However, this type of isolation might be sheared. exposed to the risk of damage during assembly or during that shift for the purpose of setting the pole air gap y and statically not very reliable. Instead, the struts z. B. from two separate, z. B. in the J-Iitte insulated one on top of the other riveted or screwed parts exist, after which this insulation or connection point can remain permanently fixed.

The embodiment shown as an example in Figs. I to 3, probably even better, because the struts consist of one piece, consists in that the insulation il (Fig. I left) between a strut eye @) '(see Fig. 2) leading element, or z. B. the post c3 and its support such. B. the approach e1 of the composite frame e is inserted, for the purpose that this insulation can remain fixed once and for all and with subsequent removal and reinsertion of the struts or the rigidly connected motor system d2, h '= not affected or affected. is not damaged or lost. As can be seen, z. B. in the simultaneously as a carrier of the counter P (Fig. 2) serving seats or horns e1 (Fig. I to 3), z. B. in a recess of the same, a post c3 by means of a bolt neck and nut c3 ', with the interposition of insulating washers and an insulating sleeve il (Fig. I left) permanently screwed. Of course, the composite frames e, which are only used for simple single-phase counters, can already be designed in such a way that only those posts c3 have to be screwed in for the bracing v, v present, so everything is normalized, so to speak.

The structure selected as an example in Fig. I to 4., as well as the removal of the anchors g, g1 after loosening the struts and. of the external, motor system d2, h'2 are briefly explained here, although of course. The three engine systems are initially each attached to a composite element, namely z. B. the lowest motor system d, k, which forms the basic type of single-phase motor meter, on a composite frame e, e ', e', the two upper motor systems dl, hl and d2, h2 each on two composite bridges f, f, shown separately in Fig.I. . the voltage iron d, etc. each with two screws r1, y1, the main current iron h, etc. each with two screws y, r fixed to it, the main current iron i each by the angular lobe e3 and f3 resiliently against the butt joints, i (Fig. i) are pressed with the tension iron, so that a permanent, uniform magnetic return is ensured for the effective voltage stray field passing through the armature disks g, g1. The space x (Fig. 2) below the anchor! g, g1 thus advantageously remain free for the mutual and terminal connecting wires or rails of the main current coils, which are each wound around the wide lateral poles of the main current iron, but are not shown for the sake of clarity (cf.h2, Fig. i), while the middle unwound pole only serves as an opposite pole to the wide, long center pole of the tension iron d etc., on which the likewise not. Drawn tension coil is arranged in the usual tit. By mixing this center pole and the Ouerschlußschenkeln d2 ', d' (Fig. I) remaining narrow air gaps closes the motor-ineffective choke voltage field. The main stream irons hl, h2 attached in front of the composite bridges f are after the solution of the. Screws r, v can also be removed individually without removing further parts (Fig. 2).

These motor systems d, lt, e or dl, hl, f or d2, 1a2, f, which are connected as a whole by those composite elements c or f , are only ever mounted on two light supports, e.g. B. stud bolts b, b or b1, b1, attached, namely the ' otorsystem d, h, e for itself on the two short bolts b, b by their tapered part from x (Fig. 2 indicated by dashed lines) one after the other L 'dividing and insulating washers, then isolated by insulating bushes through the holes in the Ouerschlußschenkel d' (Fig. I), through the eyes e1, cl (Fig. Z) of the composite frame e, again by insulating and washers, and finally with their Engage the threaded ends in their nuts c '(Fig.2), so that by tightening the latter all these parts are firmly seated on the bolts.

Likewise, the ends of the two upper long bolts b1, b1, which are tapered from x (Fig. 2), grip one after the other through washers and insulating washers, then isolated through the eyes fl (Fig. 1) of the composite bridges f, f and the holes in the cross-section legs d2 '(Fig. i) of the tensioning iron dl, through further insulating and washers, each a longer spacer tube s (Fig. 2) and 3), and furthermore the same repeated by the second motor system d2, h2, f in addition to the aforementioned washer and insulating bushings up to the nuts b1 ', b1', after which, by tightening the latter, all these parts are in turn fixed on the bolts and at the same time isolated from them, with the exception of the pipe socket s.

In the same manner as in Fig can. I shown to 3, d, both through the lower engine system, h, e as well as behind each other dl through the upper two engine systems, hl, f and d2, 1a2, f nor special auxiliary studs c or Cl and extension bolts c2 grip, also insulated and those parts are also fastened to them using nuts c 'or e21. These auxiliary bolts are of course almost not subjected to bending, but only to axial tension or compression, in that they only have to prevent the motor systems from oscillating, which stresses the main bolts in bending, while struts v, v give the whole thing a lack of strength Maintaining the lowest possible weight with a symmetrical arrangement and uniformity of the construction, even in the case of a three-wire measuring device without the third external motor system d2, h2. In this case, for. B. in place of the latter simply supplementary or correspondingly longer pipe socket s are pushed onto the bolt b1 and z. For example, the struts v can be omitted entirely, instead of possibly connecting them to the bolts b1 by an intermediate link, in that they now only have to carry the upper bearing bracket k in their front part.

In particular those long main studs b1 and possibly also the associated ones Auxiliary bolts cl, c2, possibly only the latter c2, furthermore the struts v, v or possibly at least their posts c3 must be made of antimagnetic material (brass or the like) if they otherwise, if made of iron, an undesirably disruptive magnetic coupling would cause two motor systems each. The same is true of the short bolts b, c, even in the case of only two motor systems.

In any case, the upper bearing bracket k can be placed on that spacer pipe socket s or better each on a surrounding insulating bushing t (Fig. 2) be. So z. B. can k on the one hand in the form of a two-part pipe clamp after correct Adjustment of its position on one of those spacer pipe sockets permanently screwed remain, but with the latter it can be loosely rotated around bolt b1 and removed from it, while k with its other end on the second pipe socket s only through one rotatable clamp is held so that k after solution and pushing aside the same turned up on this side, possibly even turned all the way around on the opposite side can be, with its pipe clamp end with the pipe socket fastened in it s rotates around the associated bolt b1, so that the upper bearing journal of the armature g1 becomes free, so it is removable.

After the armature disks g, gje are in the desired symmetrical position relative to the pole air gaps y of the two motor systems d, h and dl, h; are brought, by displacement on their shaft n and their upper bearing k and lower bearing q, the struts v, v attached, i.e. attached to their post c3, only loosely screwed in at their other ends at y2, then the third outer motor system d2, h2 , f is forced into the desired symmetrical position of its working air gap y to the armature disk g1 by hand or with a tool and, while it is held in this position, then the struts v are permanently screwed to the composite bridges f, f 2 by means of the screws y2, riveted or electrically welded, furthermore, as mentioned, possibly also be permanently secured by "one or more pins r4 (Fig. 2).

Experiments have shown that even if you z. B. only under two diagonally located corners of the base plate a j e slightly underlaid and then each strong presses on the other two corners a, no change in the position of the pole air gap y opposite the armature disks g1 or g or even a touch can be seen, during the latter without struts already when tightening the bolt nuts b1 'as a result Twisting of the bolt ends and thus of the outer motor system d2, h2 almost occurs.

If for some reason the anchors g, g1 are removed, e.g. B. be examined, the outer motor system d2, h2 is to be removed, i.e. in the case of somewhat flexible leads to its current coils (on h2), which are only rated for smaller currents up to about 50 amps, it only needs to be pulled forward a little without them To loosen supply lines from the connection terminals, which are usually located at the bottom of the housing a, which is only necessary in the case of rigid supply rails for larger currents. First, the nuts b1 ', b1', c2 'are unscrewed from the three stud bolts b1, 6l, c2, the associated washers and insulating washers are removed, the screws y2 may have been removed from the posts c3 beforehand, the struts v, v or their eyes v '(Fig. 2) each somewhat laterally from the necks of the posts c3 (Fig. e.g. left) pushed out and then the whole engine system d2, h2, f in addition to adhering struts v in the direction of the pin b1 of these by Pulled off the front and simply folded over so far forward with a bend in the supply lines that the armatures g, g1 are accessible. If you fold the upper bearing bracket k as described. After loosening its clamp on the one hand, k rotates on the one pipe socket s with this, the upper bearing pin of the armature g1 is free without any change in the original axial and other setting of its upper bearing screw. The upper bearing bracket k can, in addition to the one pipe socket s firmly adhering to it, entirely from the. Bolt b1 can be pulled off and put back on later.

If you also screw the support screw q down a little earlier, possibly even earlier, then after removing the counter p and the brake magnet m, which is best fixed on a bridge (Fig. 2) and permanently set once and for all, you can now , the anchors g, g1 including the shaft n are easily pulled forward from the two remaining @ ilotorsyste.-men d, h, dl, hl and everything can be reinserted by the reverse procedure, without z. B. having to read the two bolt nuts b '(Fig. 2), whereby the armature would be easily exposed to damage and the lower motor system d, h would also become loose. After being reinserted, all parts assume exactly the mutual positions originally defined, especially the pole air gap y to the anchors g, g1, so that even the calibration does not need to be carried out, as tests have shown.

In the case of supply rails for larger currents, their connection with the terminals or possibly a separating point (the rails) arranged on them must of course be loosened beforehand, after which the entire motor system d2, h2, f can be put aside without hindrance. The type of removal of one or the other of the two rear engine systems dl, hl, f or d, h, e, which is required, then results automatically.

Likewise, those in Figs. I to 3 are not shown for the sake of clarity common voltage and main current coils of any such single or multi-phase Ferrari devices common types as well as their corresponding single or multi-phase current circuits well known for many years and can therefore be ignored here.

Claims (1)

PATENT CLAIMS: i. Bracing of the motor travels in multi-phase measuring devices according to the Ferraris principle, in particular motor meters, in which a pair of motor systems acting on a common armature one behind the other on two common light carriers, e.g. B. studs, however, a third motor system is separately attached, characterized in that between the composite element, for. B. the composite bridge (f) of the outer engine system (d2, h2) and the composite element, e.g. B. the composite frame (e) of a separate engine system (d, h), two struts (such as v, v) are arranged, for the purpose of maintaining this light construction, the desired position of that outer engine system (d2, h2) , in particular that of its working air gaps (y, see. Fig. i below) opposite the armature (g1) and also to secure the position of the upper bearing (k) as well as to secure that outer motor system (d2, h2), e.g. B. for the purpose of removing the anchor (g, g1) to be able to remove without the latter z. B. by loosening the attachment of the single motor system or of its bolt nuts (b, b) to endanger. : 2. Strut according to claim i, characterized in that the struts (such as v, v) are each provided with an eye (such as v 'Fig. B. y3) on an engine system (d, h), e.g. B. on the side surfaces of its composite frame (e, Fig.2), attached, but best z. B. on a matching neck (Fig. I left) of a post (e3) is hooked and only secured by means of that screw (r3), while on the other hand the struts (v, v) with an initial slack, i.e. can be moved by a small amount (larger holes o 'in f2 Fig. 2) are riveted, electrically welded or rigidly fastened to the other motor system (d2, h2) by means of screws (r2), for the purpose of initially inserting the outer motor system (d2, h2) into place when they are fastened (r2) force the appropriate position or direction and only then be able to fix that connection (r2) with the struts, in particular before the pole air gap (y) is parallel and symmetrical to the armature disk (g1), after which that connection point (y2) can remain permanently and in the case of removal of the outer motor system (d2, h2) only those eyes (v ') of the struts are to be released or, guided by them, all parts easily take up that mutual position once they have been reinserted. 3. Strut according to claim i and 2, characterized in that an electrically separating insulation is inserted into the same at one point, possibly z. B. at an "Irennstelle of the struts (v, v) themselves, for the purpose of keeping the motor systems statically connected by the latter electrically isolated from each other. Q .. Strut according to claim 3, characterized in that the insulation (1l, Fig.I left) between an element guiding the strut eye (v ', Fig. 2) or e.g. the post (c3) and its support such as the attachment (e4) of the composite frame (e) is inserted for the purpose that this insulation can remain solid once and for all and is not affected, not damaged or even lost if the struts or the motor system (d2, h2) connected to them are subsequently removed and reinserted.