SU930399A1 - Pulsed transformer - Google Patents

Description

(5) PULSE TRANSFORMER

I

The invention relates to the design and manufacture of pulse transformers for magnetic-pulse installations and may find application in the engineering and metalworking industry for welding, assembling, molding, and hardening.

A transformer-inductor is known, which comprises an inductor enclosed in a winding, made in the form of two massive segments, the ends of which are connected by bridges, in which surfaces facing each other are recessed, about (working volume for accommodating the workpiece 1.

However, the known device has limited functionality and it has a low efficiency.

Also known pulse transformer containing the primary winding, made in the form of a massive coil, the secondary winding, made in the form of two massive segments connected to the inductor using clamping devices, and the primary winding is covered by an isolated secondary winding 21.

However, the presence of a coaxial connecting line and contact devices on the segments leads to an increase in inductance and, consequently, causes a decrease in the efficiency of the pulse transformer. The presence of a separate inductor, contact devices and a coaxial line complicates the design, causes additional consumption of materials, which

IS reduces its reliability and increases the cost of the matching device.

The purpose of the invention is to increase efficiency, simplify the design and save materials.

The goal is achieved by the fact that a pulse transformer containing a primary winding made in the form of a massive coil, a secondary winding made in the form of two massive segments, the ends of which are fastened to each other, provided with jumpers installed at the ends of the segments, are middle. parts of the jumpers are made overlapping in the horizontal plane, forming a hole in the center, the primary winding engages the secondary winding. FIG. 1 shows a pulse transformer, general view; in Fig.2.2A-L in Fig.1. The pulse transformer contains a massive primary winding 1, inside which the secondary winding is located, in the form of segments 2 and 3, respectively, with ends t, 5 and 6, 7. Segments 2 and 3 on the outer surface are isolated by sleeve 8 from the massive primary winding 1. Ends 4 and 5 segments 2 are bridged by a jumper 9 and, respectively, the ends 6 and 7 are bridged by a jumper 10. Hole 11, creating a working volume formed by recesses 12 and 13, made in bridges 9 and 10 and located on the side opposite to the corresponding segment. Jumpers 9 and 10 are made removable and are pressed by bolts And and insulating pads 15 to the ends of the C5 and 6, 7 segments 2 and 3. The middle parts of the bridges 9 and 10 are made overlapping in the horizontal plane. Jumpers 9 and 10, the ends, 5 and 6, 7 at the points of contact and intersection and the ends, and 6, 7 are insulated with a gasket 16. In the working opening 11, the workpiece 17 is placed. The primary massive winding 1 is connected to the capacitive storage circuit C through- switch K The proposed pulse transformer operates as follows. At the moment when switch K closes in a circuit formed by a capacitive drive C and a primary massive winding 1, a damped oscillating discharge occurs. The current flowing through the primary winding 1 causes currents in the segments and 3 lateral windings, which are closed to jumpers 9 and recess 12 13, forming the working opening 11. The current flowing through the middle part of the jumpers, in turn, induces a current in the workpiece 17 which, electrodynamically interacting with the current in the middle part of the transducer, leads to its deformation. The direction of the current in the jumpers and 10 is shown by arrows in FIG. Jumpers 9 and 10 are made so, the part of the jumper adjacent to the working volume is located on the side opposite to the corresponding segment. This makes it possible to significantly increase the mechanical strength of the working area of the proposed device in comparison with the known one. The forces F acting on the part of the jumper 9, for example, located at the connection points, are directed in the direction opposite to the force P acting on the part of this jumper 9 adjacent to the working volume (figure 1). The current flowing along jumper 9 is the same along its entire length and the forces acting on each of the parts of jumper 9 will be directly proportional to the length. Since the length of the parts of jumper 9 adjacent to the connection points is greater than the length of part of jumper 9 adjacent to the working volume, the total force will press this part to the working volume and prevent it from deforming. Since jumpers 9 and 10 simultaneously perform the functions of a busbar, an inductor and clamping devices, they have a minimally possible parasitic inductance, which decreases by 20-30% and, therefore, increases efficiency by 10-15 compared to a lime impulse transformer. Since the insulation between the massive primary winding 1 and the secondary winding in the form of segments 2 and 3 is made in the form of an insulating sleeve 8, made, for example, of mica and having, as a rule, small thickness and small losses, the segments 2 and 3 form the secondary The winding is tightly pressed to the massive primary winding 1, which reduces the inductance of the system by 25-30, and consequently, increases the efficiency by 20-25% compared with the known device. The possibility of making segments 2, 3 and jumpers 9, 10 in the proposed pulse transformer from a material with low electrical resistance allows to significantly reduce heat loss and increase the efficiency of the device by 10 compared with the known.

Claims (1)

Claim A pulse transformer containing a primary winding made