Low-voltage foil-wound coil structure of capacity regulating transformer and capacity regulating transformer

Abstract

The invention relates to the technical field of transformer, in particular to a low pressure foil winding coil structure of a modulating capacity transformer and the modulating capacity transformer. The low pressure foil winding coil structure of the modulating capacity transformer comprises a first winding, a second winding and a third winding; the first winding and the second winding are concentrically arranged in sequence from top to bottom; the first winding and the second winding are connected in series or in parallel; the outsides of the first winding and the second winding are sleeved with the third winding; the third winding and the first winding or the second winding are connected in series. Because when the modulating capacity transformer is under the small capacity condition, the number of turns of the main empty path far away from the modulating capacity transformer is large, so that the inductive reactance of the modulating capacity transformer is increased, the short circuit impedance, mainly composed of the inductive reactance, of the modulating capacity transformer is increased, accordingly the difference value between short circuit impedances under the big and small capacity conditions is reduced, so that the accordance of the short circuit impedances under the big and small capacity conditions is improved, and accordingly the qualification margin of the short circuit impedances under the big and small capacity conditions of the modulating capacity transformer is improved.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a low-voltage foil-wound coil structure of a capacity regulating transformer and the capacity regulating transformer. Background technique [0002] The transformer's own loss consists of no-load loss and load loss. The no-load loss of the transformer exists in real time under the condition that the terminal voltage of the transformer is constant, and its magnitude is constant, and the load loss changes with the change of the load. When the power consumption of factory equipment or households is very low at night, the transformer load loss is already extremely low, but the no-load loss of the transformer remains unchanged or even increases due to the low power consumption and voltage rise; when the residential area or just put into use When the power consumption of the opened factory is still very low, when the seasonal power consumption difference is large, the no-load loss...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-voltage foil-wound coil structure and a capacity-adjusting transformer to solve the technical problem in the prior art that there is a large difference in short-circuit impedance between transformers with large capacity and small capacity

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