FIELD: electronics.
SUBSTANCE: invention relates to power supply device (A, B) for straightening three-phase current in multi-pulse direct current. Device contains at least one three-phase alternating current transformer with core, or three single-phase alternating current transformers, each with cores. Three-phase alternating current transformer includes three first coils arranged at secondary side (L21, L22, L23), which, respectively, are located on rod of transformer core, or each of three single-phase alternating current transformers includes first coil at secondary side, at that, each coil located at secondary side is located on one rod of transformer cores. Device also contains at least one first rectifier, including first gates (D1, D2, D3), which are connected to first coils arranged at secondary side (L21, L22, L23) in first rectifier.
EFFECT: power supply device (A, B) has tools (S1, S2, S3) for change of reduction ratio of three-phase alternating current transformer, or reduction ratios of three single-phase alternating current transformers, which provide technical result of assuring maximally stable DC voltage at output.
8 cl, 7 dwg
