JPS58153427U - transformer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the configuration of a conventional transformer that has an electromagnetic shield on the inside of the tank, and Figures 2 and 3 show the coil arrangement in the transformer shown in Figure 1 with and without tap removal. Schematic diagrams shown in Fig. 4 A-9 are diagrams showing the magnetic flux density and magnetic flux amount distribution in the case of the coil arrangement in Fig. 2, and Fig. 5 A-9 shows the magnetic flux in the case of the coil arrangement in Fig. 3. FIGS. 6 and 8 are diagrams showing the density and magnetic flux distributions, respectively, and schematic diagrams showing the arrangement of the coils in a transformer to which an embodiment of this invention is applied, with and without tap disconnection, respectively. 7 and 9 are diagrams showing the distribution of the amount of magnetic flux in FIGS. 6 and 8, respectively, FIG. 10 is a plan view showing an example of a drive mechanism for moving the electromagnetic shield, and FIG. It is a figure which shows the connection state of the rack and pinion gear in a figure. In the figure, 1 is the iron core, 2 is the coil, 3 is the tank, and 4a
4b is a fixed shield, and 4b is a movable shield. Note that the same reference numerals in each figure indicate the same or corresponding parts. inl"l I')

Claims (1)

[Scope of utility model registration request] A transformer having an electromagnetic shield on the inner surface of the tank, characterized in that the position of the electromagnetic shield is moved from the outside of the tank.