| 摘要 |
The invention provides an impedance bond for use in electric railway systems having a lower casing (10) with a well (12) for accommodating a generally circular winding and magnetic core system (20). A plurality of magnetic cores (26) is disposed in a circle through which run two d.c. windings (28, 30), each winding traversing the circle twice. An a.c. winding also traverses the cores (26) in a vertical stacked arrangement which maximises the overall length of loops of d.c. windings (28, 30) which are magnetically coupled by the cores (26). The arrangement provides greater and more even magnetic coupling and hence an operational improvement. Furthermore the length of the d.c. winding rod or bar and the number of magnetic cores can be reduced in comparison to the known low-height winding and core arrangements for a similar electrical performance. |
