| 摘要 |
FIELD: electric trains of high-speed railways. SUBSTANCE: proposed power transformer has core-type magnetic circuit. Each leg of it carries two primary windings with same radial dimension arranged on one co- center in levels. Another co-center carries two secondary windings of equal radial dimension. In this case one primary and one secondary winding are placed at one level over height of leg, another primary and secondary winding are arranged at another level. Relation of heights of windings of first and second levels is equal to relation of rated powers of windings multiplied by coefficient K=0.3-0.6. Reactor winding with induction equal to 0.5-1.5 induction of secondary winding with short-circuited primary windings is placed in circuit of secondary winding of first level. Heights of windings of first and second levels and distance between windings are chosen on condition that change of load current in one of secondary windings from zero to rated value does not cause more than 5.0% change of voltage across another secondary winding. EFFECT: suppression of higher harmonics and mutual influence of electromagnetic processes under optimum mass and size parameters. 2 dwg |
