| 摘要 |
<p>PURPOSE:To obtain a large capacity auto-transformer whose tertiary terminal voltage does not change regardless of the tap position and is easy to use by a method wherein two series windings and two shunt windings in the 1st tank are respectively connected in parallel and moreover, the tertiary winding and an exciting winding in the 2nd tank, and a series winding of a series transformer and a series winding of a main transformer are respectively connected by leads. CONSTITUTION:The voltage applied to the terminals (u), (v) of shunt windings 2a, 2b is the voltage of medium voltage side and constant, so excitation of a core does not change regardless to the tap position. Thus, the terminal voltage of the tertiary winding 3 is also constant regardless to the tap position accordingly. Then the voltage of high voltage side is a summation of the induced voltage of series windings 1a, 1b and shunt windings 2a, 2b, which induce a constant voltage, and the induced voltage of series winding 11 of a series transformer 63, which induces variable voltage in accordance with the tap position, and can be adjusted to a required value by selecting a voltage of a tap winding 4 and the turns ratio of two windings 51 and 11 of the series transformer 63. The construction of the main transformer is simple because the tap winding 4 and the series transformer 63 are not housed in the same tank.</p> |
