CZ277940B6 - Transformer winding from a flat multicore conductor - Google Patents

Abstract

The coils of all the required voltages are wound by a flat multi-core conductor (2) on the common core. The flat multi-core conductor (2) is wound from its centre on two coil disks with the same number of turns. The conversion factor between the transformed voltage and the currents depends on the series and parallel connection of individual cores to the independent coils. This solution can be used mainly when winding transformers with a small number of coil turns, such as voltage converters, impulse transformers and in ignition transformers.<IMAGE>

Description

The invention relates to an arrangement of a transformer winding made of a flat multi-core conductor for electrical transformers with a view to improving the constructional and electrical properties of the windings.

In the current practice, the windings of the transformers are carried out by a single round or strip conductor or a parallel strand of conductors as separately wound coils, or as separately wound layers of one coil. One coil or winding layer is wound for each transformed voltage. The disadvantage is the laboriousness of such windings and the demands on the accuracy of the work when placing the threads in the coils. The advantage of these windings is that any conversion ratio of the windings of the individual coils and their mechanical design including insulation can be achieved.

A new feature over the current winding arrangements for electrical transformers is provided by the flat multi-core conductor transformer winding according to the invention, which consists in that coils of all desired voltages are wound simultaneously by one common flat multi-core conductor on a common core. the opposite winding sense and with the same number of turns. The individual cores of the flat multicore conductor are connected in parallel or in series into separate coils with their ends according to the desired conversion ratio between their voltage levels.

The advantage of the transformer winding from the flat multi-core conductor is its simple manufacture, compact design suitable for self-supporting windings, outlet of all winding ends from the last thread layer and versatility of use for transformation between individual voltage levels, which are usually multiples of a certain basic level. These levels can be assembled by various parallel and serial connections of the individual cores of the flat multi-core conductor. Parallel winding of the primary and secondary coils has a beneficial effect on the coil dispersion inductances and is especially evident in high-frequency voltage converters by reducing the parasitic voltage spikes and windings.

The figure shows the basic principle of the arrangement of the transformer winding from a flat multicore conductor on the transformer post.

On the core post 1 there is a winding of a flat multi-core conductor 2. The flat multicore conductor 2 forms two identical disk coils side by side with the same number of turns, but in the opposite sense, on the core post 1. The beginnings of the two coil reels are connected because they consist of an uninterrupted wire. Their ends form the winding outlets.

The individual cores of the flat multi-core conductor 1 consist of insulated coils with a number of turns equal to the sum of the coils of the two coils of the flat multi-core conductor 1. Mutual parallel or series connection conductors, according to the connection of cores.

The transformer winding of the flat multicore conductor according to the invention reduces the manufacturing effort of the transformer windings and improves the electrical parameters of especially pulse and high-frequency transformers which are wound on potted cores. These transformers typically have a small number of turns but require a mechanically self-supporting winding that optimally uses the winding space. This is accomplished in the arrangement of the transformer winding from a flat multi-core conductor, since the coils are very compact and all the terminals are in the last layer of the winding. The tight winding of all cores has a beneficial effect on the wind inductance dispersion and thus reduces the amount of overshoot in switching operation.

PATENT CLAIMS

Claims (1)

Transformer winding from a flat multi-core conductor, characterized in that coils of all the required voltages are wound simultaneously by one common flat multi-core conductor (2) on a common core (1), in two secondary coil rolls with opposite winding sense and with the same number of turns. the wires of the flat multicore conductor (2) are connected in parallel or in series into separate coils according to the desired conversion ratio between their voltage levels.