SU506913A1 - Disc winding - Google Patents

Description

(54) DISK WINDOW

The increase in current through the longitudinal capacitance, as it approaches the beginning of the winding, is compensated by the increase in the longitudinal capacitance, so that the magnitude of the gradient AUi Ii / Ki remains approximately constant. This ensures the alignment of the capacitive distribution curve in the zone of changing channels, which leads to a decrease in the overall level of gradients both at the beginning and in the depth of the winding.

By reducing the height of the first channel to a value that is minimally permissible under cooling conditions, the decrease in the electrical strength of this channel is compensated for by a more significant decrease in the amplitude of the gradient on it, so that the safety margin increases.

The optimal relationship between the number of drops X (counting from the beginning of the winding) and its height over copper, which ensures equality of capacitive distribution gradients in the zone of increasing channel height, is expressed by the formula

one

X., - 2F (3),

Where:

F (5) ft. X

.Mhj1

with

h

M11H

1+

) J

(5,, ax) (fi +)

1, ЗЗв,.,. /.

where 5mia, 5max - the minimum and maximum allowable height of the channels in the winding; d, R, h is the average diameter, radial size and height of the winding wire, respectively;

81 - averaged dielectric constant of the interspace gap;

62, 2, L is the average dielectric constant, average diameter and width of the interwinding gap, respectively. The optimal law of increasing channel height with increasing their number is close to exponential, i.e. the ratio of the height of the subsequent channel to the height of the previous channel remains almost constant for this winding and varies between 1.1 and 1.5 for different windings. The effectiveness of the proposed winding compared to a uniform winding and a winding with enlarged first channels is provided for any ratio of channel heights from the specified range, however, to obtain the greatest effect, it is recommended to choose this ratio using the formulas given.

 ..

Claims (1)

Invention Formula A disk winding, for example, for transformers, comprising continuously wound coils with different coil spacings in height, characterized in that, in order to increase the electrical strength, the coils are installed with increasing distances between them from the beginning of the coil to depth one, two times the height of the winding wire and are within 1,, 5, where a is the ratio of the subsequent to the previous intermix distance over copper. IG fui. one