Zigzag type phase shift auto-transformer

Abstract

The invention relates to a zigzag type phase shift auto-transformer and belongs to the technical field of production of transformers. The technical scheme includes that each phase of the transformer is divided into three windings which are a common winding, a first series winding and a second series winding, the common winding is connected with the first series winding in a zigzag mode, and the first series winding is connected with the second series winding in a zigzag mode; and different required voltage and phase shift are achieved by changing the voltage ratio of the first series winding to the second series winding, and the achievement has no direct restrictive relation with a primary voltage ratio and a secondary voltage ratio. According to the zigzag type phase shift auto-transformer, phase shift in different angles can be achieved by changing the voltage ratio of the first series winding to the second series winding, the achievement has no direct restrictive relation with the primary voltage ratio and the secondary voltage ratio, the problem of high costs of multi-impulse rectifier transformers is solved, the problem that the voltage ratio and phase shift angles of a normal phase shift auto-transformer are mutually restricted is solved, and application ranges of the phase shift auto-transformer is broadened.

Description

technical field [0001] The invention relates to a zigzag phase-shifting autotransformer, which belongs to the technical field of transformer production. Background technique [0002] At present, with the diversification process of the rectification system, the rectification transformer, as the power supply part of the rectification system, also presents diversified characteristics. For high-power rectification equipment, in order to improve the power factor and reduce the harmonic current on the grid side, the pulse number of the rectification equipment must be increased. BACKGROUND OF THE INVENTION Transformers with phase shifting and parallel operation of multiple windings are usually used. However, for rectifier transformers with relatively high primary and secondary voltages or relatively small primary and secondary voltages, the cost of using multi-winding transformers to achieve phase shifting is relatively high, so phase-shifting autotransformers can be considered. ...

AI Technical Summary

Problems solved by technology

However, for rectifier transformers with high primary and secondary voltages or relatively small primary and secondary voltages, the cost of phase shifting using multi-winding transformers is relatively high, and phase-shifting autotransformers can be considered

However, the phase-shifting autotransformer is greatly restricted by the ratio of the primary and secondary voltages and the matching of the phase-shifting angle, and the scope of application is small.

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