DE2055596A1 - - Google Patents

Description

Patent attorneys Dipl.-Ing. W. Scherrmann Dr.-Ing. R. RQger

73 Essllngen (Neckar), Fabrikstrasse 9, Postfach 348 November 9, 1970

Tolflfon

PA 1 nak Slullgart (0711) 354539

35961?

Telegrams Palenlfdiulz Esslllngenneckar

Hermann Schwabe company , owner Günther Bachorz, electrical engineering factory , 7067 Urbach (Württ)., Auf dem Wasen 25 ■

Choke or transformer

The invention relates to a choke or a transformer with a laminated core which is T-shaped in cross section, a U-shaped, laminated jacket surrounding the core, the leg ends of which enclose the transverse bar of the T-shaped core and a clamping rail at the free ends of the legs of the shell.

The object of the invention is to achieve a precisely determined air gap in devices of the type mentioned, to create precisely defined winding spaces for two windings, to reduce the tendency to hum and to have the possibility of being able to push completely wound coils provided with the insulation onto the core as well as the formation of the core significantly to ve re i η fa ehe η.

According to the invention, the core or each of its lamellae consists of two T-shaped parts which are arranged one above the other and are designed in one piece or in two pieces . Here, the inner cross-bar can the be T-shaped core member shorter than the outer crossbar of the T-shaped core member, so that the leg in each case produces an air gap between the ends of the crossbar of the shell and the preferably straight inner surfaces *

109125/1264

Further features of the invention are explained with reference to the drawing, in which an embodiment of the subject matter of the invention is shown in cross section. The U-shaped laminated jacket 1 surrounds the laminated core 2, which consists of two T-shaped core parts 2 ¹ and 2 ″ with the crossbars 3 and 4. This shape of the core creates two precisely defined winding spaces, each of which is located a winding 5 or 6. To form an air gap, the inner cross bar 3 of the T-shaped core part 2 is kept somewhat shorter than the outer cross bar 4 of the T-shaped core part 2 ″, which in the finished state of the device has its end faces 7 rests snugly against the inner surfaces 8 of the ends of the legs 9 of the casing 1. Since the inner surfaces 8 of the legs 9 run parallel to one another, there is an air gap 10 of a precisely defined size between each end of the crossbar 3 of the T-shaped core part 2 'and the respective associated leg inner surface.

Each of the two windings 5 and 6 is surrounded by a layer 1.1 of insulating material, preferably pressboard. This location docks at least the straight sections from each winding and thus extends essentially over the length of the core and the jacket. With one of the windings - with winding 5 - this is insulating material layer widened in the area of the core to such an extent that the insulating material protrudes into the air gap 10. The strength of the insulation material; is slightly larger than the width of the air gap This insulating material is therefore used when the device is fully assembled between the inner crossbeam 3 and the jacket 1> pressed together, whereby any tendency to hum is effectively prevented. A clamping bar 12 is used to connect the ironer and core provided with their upwardly and inwardly curved longitudinal edges 13 under prestress in grooves 14 near the ends the leg 9 engages. As a result, the leg ends are firmly against the end faces of the outer cross member 4 of the T-shaped mold core part 2 "pressed. Between clamping rail 12

109825/1264

and core 2 is a layer 15 of insulating material, again preferably pressboard. The rail 12 can, as indicated, be curved convexly upwards; after it has been attached, it therefore exerts pressure on the outer crossbeam 4 and thereby presses the upper end face 16 of the core against the jacket. Instead of a curved shape, the rail can also be provided with one or more longitudinal beads, which are directed against the lower surface of the outer transverse beam 4. When it is attached, the rail deforms somewhat as a result of the bead or beads placed against the core, so that in this embodiment, too, the core is pressed elastically against the web of the jacket. The parting line 17 between the two T-shaped core parts 2 ″ and 2 ″ runs at an angle reentering ^{the upper core part 2 1.} The core structure of two parts makes it possible to make the windings on a winding form »to provide the outer insulation (the layer 11 of insulating material, etc.) and then to place such a winding on a core part, after which the two each with one Winding provided core parts are assembled to form the entire core.

1Q8S2S / 12C4

Claims (4)

Claims 1.) Choke or transformer with a laminated core with a T-shaped cross section, a U-shaped laminated jacket surrounding the core, the leg ends of which enclose the transverse bar of the T-shaped core, and a clamping rail at the free ends of the legs of the jacket , characterized in that the core (2) or each of its lamellae consists of two T-shaped parts (2 ¹ , 2 ") which are arranged one above the other and are designed in one piece or in two pieces. 2. choke or transformer according to claim 1, characterized in that the inner crossbar (3) of the T-shaped core part (2 ¹ ) is shorter than the outer crossbar (4) of the T-shaped core part (2 "), so that between the ends of the transverse bar (3) of the casing (1) and the preferably straight inner surfaces of the legs (9) each create an air gap. 3. choke or transformer according to claim 1 * characterized in that the core (2) or * each of its lamellae is formed from two separate T-shaped core parts (2 ¹ , 2 "). 4. choke or transformer according to claim 3, characterized in that the parting line "(17) between the two core parts (2 ¹ , 2") extends according to a re-entrant angle in the crossbeam (3) of one core part (2 ^1). 109825/1264