| 摘要 |
<p>PURPOSE:To eliminate a booster transformer and realize reduction in size of transformer and low cost by forming both ends of serially connected first phase and third phase coils as the secondary terminals of A seat, foming both ends of second phase coil as the secondary terminals of B seat and connecting three phases of tertiary coil in triangle in the same number of turns. CONSTITUTION:The primary windings 16U, 16V, 16W of 3-phase/2-phase conversion transformer 15 are connected in star, the neutral point is grounded and respective tertiary windings 18a, 18b, 18c are connected in triangle. A number of turns of the secondary windings 17u1, 17u2 and 18w1, 18w2 of the first phase U and third phase W of the secondary windings for such primary and tertiary windings are set to N/3<1/2> and the second phase V is formed by the secondary windings v1, v2 with N turns. These secondary windings 17u1, 17w1, and 17u2, 17w2 are connected like a symbol?, a phase difference between windings is set to 180 deg., both ends of serially connected first phase and third phase are defined as the secondary terminals TA-NA1 and FA-NA2 of the A seat and both ends of second phase V is defined as the secondary terminals TB-NB1, FB-TB2 of the B seat. Thereby, a booster transformer may be eliminated.</p> |
