MULTI-PHASE TRANSFORMER Russian patent published in 2005 - IPC

FIELD: manufacture of transformers, possibly used in semiconductor conversion devices.

SUBSTANCE: inner axial magnetic circuits in grooves of which secondary multi-phase or three-phase windings are placed have two active end surfaces and they are shifted relative to magnetic circuits in grooves of which primary three-phase windings are placed around their common symmetry axis each by its own angle α_i =(2 x i-1)π/m₂ (k_2B + 1) where i - order number of inner magnetic circuit with secondary winding, m_{2 -} quantity of phase of secondary windings, k_2B -quantity of inner magnetic circuits with secondary windings. Lateral axial magnetic circuit adjoined to inner axial magnetic circuit with primary windings adjoined to k_2B inner axial magnetic circuit with secondary windings is turned relative to magnetic circuits with primary three-phase windings around their common symmetry axis by angle α_l = (2 K_2B + 1) π/m₂ (k_2B +1). Secondary multi-phase windings are placed in grooves of inner axial magnetic circuits and they are shifted one relative to other by angle α _sh = π /m₂ (k_2B +1). Quantity of inner magnetic circuits with secondary windings is determined by relation k_2B = (m_T / 2 m₂ ) - 1, where m_T - quantity of phases of outlet voltage.

EFFECT: lowered cost, enhanced mass and size factors, reduced consumption of power and electrical-engineering materials, improved efficiency of transformer.

2 dwg