DE3238877A1 - Two-piece jacket core, in particular for transformers, transmitters and inductors - Google Patents

Abstract

The patent application publishes a new method of sheet-metal division having the designation two-piece jacket core, in particular for transformers, transmitters and inductors. Magnetic fields are generally used in order to achieve electromagnetic coupling of two separate currents. Since a magnetic material, for example magnetic sheet steel, is required for low-loss construction of these fields, cores have been produced in the most varied shapes for years from stamped individual metal sheets. These cores must in general be inserted in the coil formers. In this case, the financial and labour cost of production is determined essentially by the sheet-metal shape. The sheet-metal shapes which have been known in the past take into account only the point of view of low material usage (stamping without waste) or the point of view of easy processing (divided sheet-metal shapes). The above-mentioned patent application proposes a sheet-metal shape which takes into account both points of view. The proposed sheet-metal shape can be stamped without waste, on the one hand, and can be layered easily, because of the sheet-metal shape. <IMAGE>

Description

Two-part jacket core, especially for transformers, transmitters

and chokes The invention relates to two-part cladding laminations for Transformers and chokes in waste-free or low-waste punching, for example according to the core sheets according to DIN 41302 as well as in special dimensions.

There are known sheets in a variety of special shapes, which all developed exclusively for the rationalization of transformer manufacturing became. The main disadvantage of these sheets is that these blcch cuts require a significantly higher material requirement than, for example, EI core sheets according to DIN 41302 in waste-free or low-waste punching method.

Sheets in the original design according to DIN 41302 have the disadvantage that an effective rationalization is hardly possible, since the E - part with the central tongue is probably can be inserted into the coil, but the I-part can only be put on especially when processing in packets, i.e. when the individual sheets are not reciprocated processed and thus there is no fixed connection with the coil.

Two-part jacket core, especially for transformers, transmitters and Chokes The object of the invention is now to develop a sheet metal cut which with approximately the same material requirements as, for example, the sheet metal cuts DIN 41302 enables a meaningful rationalization.

This is achieved in that, as shown for example in Fig. 1, the sheet metal cut is carried out in ET form.

This makes it possible for both core parts to be machined into the coil can be introduced and a mechanical connection with the coil is given. The significantly improved mechanical connection also applies to one-sided and alternately layered transformer cores such as in FIG. 2 and FIG. 3, respectively.

Fig. 1 shows blank according to dimensions EI without waste. Fig. 2 "one-sided Box-wise Fig. 3 "Double-sided box-wise Fig. 4 II Cut according to dimensions EI low-waste Fig. 5 "one-sided boxed Fig. 6" two-sided boxed Fig. 7 "Cut to size according to type M Fig. 8" One-sided in a box Fig. 9 "two-sided chess {c.weisc Blank page

Claims (1)

Two-part jacket core, especially for transformers, transmitters and Chokes patent claim (: two-part jacket core especially for transformers, Transformers and chokes according to the dimensions according to DIN 41302 and similar suitable dimensions. Characterized by the fact that 2 T-sheets from the omission two E sheets are manufactured. By shortening the middle tongue of the E-sheets the formation of a T-cut instead of the I-cut is made possible. The claim includes all suitable blanks accordingly DIN 41302 and similar cuts for the areas of application mentioned in the preamble.