CS207115B1 - Actuating parallel transformer for the high-frequency electron tubes generators - Google Patents

Description

DESCRIPTION OF THE INVENTION

REPUBLIC TO COPYRIGHT CERTIFICATE

(61) (23) Show Priority (22) Registered 14 12 79 (21) PV 8788-79 207 115 (11) (Bl) (51) Int. Cl. 'H 01 F 19/04

OFFICE OFFICE

AND DISCOVERY (40) Published 15 09 80 (45) Published 01 11 83

The inventor of BURDA. VACLAV ing., PRAHA ,, HEJKAL MIROSLAV, RYCHNOV nad NISOU ,,

JARES: FRANTIŠEK ing., PROCHÁZKA JIŘÍ a- REGNER KAREL ing., PRAGUE (54) Excitation parallel transformer for high-frequency tube generators 1 The subject of the invention is the excitation parallel transformer for high-frequency electronic generators.

The parallel excitation transformers currently used in industrial high-frequency tube generators are generally designed such that the primary winding is connected in parallel to an oscillator circuit with a high-frequency voltage of about 10 kV or more, depending on the device design. The secondary winding feeds the grid of the oscillating tube. For reasons of function and the excitation transformer, as a rule, you are designing a relatively low coupling factor of about 0.45 to 0.6. Therefore, the threaded ratio of the secondary winding to the primary is always higher than the actual drive ratio. As a result, when using secondary taps to change the excitation ratio, winding must be carried out with increased insulation strength, because it induces a threaded ratio on the disconnected portion of the winding and is higher than the wired portion. Therefore, it is necessary to place an insulation barrier between the primary and secondary windings, due to the voltage strength, to prevent jumps between the primary and secondary windings. By omitting this barrier, it is necessary to increase the isolation distance between the primary and secondary windings. By inserting an isolation barrier; it increases the structural complexity and manufacturing effort of the transformer and the voltage gradient on the individual layers of the insulation system. Increasing the insulating distance between the primary and secondary windings while maintaining the diameter of the outer winding acts to reduce the bonding coefficient, thereby reducing the excitation ratio. The correct excitation ratio must then be obtained either by increasing the number of secondary windings or by reducing the number of primary windings. By increasing the number of turns, the secondary winding increases the inductance of the secondary winding scattering, causing a shape and phase distortion of the excitation pulse and a lower efficiency of the high frequency generator. By reducing the number of turns of the primary winding, the primary winding load is increased, which must then be artificially cooled, notwithstanding that reducing the primary winding reactance reduces the apparent power in the generator's working load. the formation of creep currents on the winding support insulators.

The drawbacks of the known solutions are eliminated by the excitation parallel transformer for high frequency tube generators according to the invention, with the secondary winding placed inside the structure carrying the primary winding, the primary being that a primary is wound on the outer wall of the assembling combs connecting the perimeter of the upper face with the lower face. a winding of a non-insulated conductor and within the primary winding is fixed to one of the faces, a support cylinder on whose outer wall the secondary winding of the insulated, high voltage conductor is wound, wherein two parallel openings are formed in the support cylinder through which the stripped loop of the secondary winding is pulled to connect taps.

The main advantage of the solution according to the invention is that the secondary winding is made of a high voltage insulated conductor and is provided on a simple support roll, which can be made of a low-cost material, for example hardened paper. The insulation of the conductor from which the secondary winding is burned forms, on the one hand, a potential barrier between the primary and secondary windings and, on the other hand, determines the pitch of the secondary windings, which may not necessarily be located on the production-intensive insulation crests. A further advantage is that the secondary winding taps are mounted on a stripped secondary winding loop extending through two parallel openings into the inside of the support roll, thereby increasing the isolation distance between the primary winding and the secondary winding tapping point, while also forming a potential barrier. The exciting parallel transformer of the present invention is inexpensive, yet unreliable, to retain optimum performance properties. An exemplary embodiment of an excitation parallel transformer according to the invention is shown schematically in the drawing, wherein Fig. 1 is a vertical sectional view of an excitation parallel transformer;

The excitation parallel transformer according to the invention consists of two faces connected at the periphery by a set of insulating ridges, on the outer wall of which a primary winding 1 made of a non-insulated conductor is wound. Within the primary winding thus formed, a support roll is mounted on one of the faces of the supporting roll on whose outer wall a secondary winding 2 formed from a high voltage insulated conductor is wound. Two parallel openings 6 are formed in the support cylinder ± through which the loop J of the secondary thread is passed. In the place of the loop J, the secondary thread guide J is insulated to connect the branch 8. The support roll on which the secondary thread 2 is wound may be preferably made of hardened paper or other undemanding material. The insulation of the conductor from which the navit® is

Claims (1)

207, 115, the coil winding serves as a barrier to the primary winding 1 and the secondary winding 11 also serves as a barrier to the carrier roll which increases the isolation distance between the primary winding 1 and the tapping point 8 to the secondary winding loop 12. OBJECT OF THE INVENTION Excitation Parallel a transformer for high-frequency tube generators having a secondary winding disposed within the structure carrying the primary winding, characterized in that on the outer wall of the set of insulating combs (2) circumferentially the upper face (5) of the 3 lower face (5 ') ), the primary winding (1) is wound from a non-insulated conductor and a supporting cylinder (4) is fixed to one of the faces (5) on the outside of the primary winding (1). insulated for high voltage, wherein two parallel openings (6) are formed in the support cylinder (4) by which the protrusion the stripped loop (7) of the secondary winding (3) for connecting the taps (8). 2 drawings