Method for producing tri-splitting drive rectifier transformer

Abstract

A production method for three cleaving transmission transformer belongs to transformer technology field and solves impedance matching problem of three low press windings. It counts electric field, magnetic field, short circuit impedance, short circuit intensity and leak magnetic field of transformer to match impedance of three low press windings. a. Count voltage and current parameter. b. Select iron core parameter. c. Select loop parameter. d. Count short circuit impedance. e. Count spoilage, temperature rise and mechanical power. f. Confirm structure collocation type and parameter. It finds the rule about the three cleaving transmission transformer to solve the problem of high voltage winding circumfluence and keep the transformer with natural function at all kinds of load condition. When satisfied the coequal load condition, it can reduce 50% area and 15-20%spoilage with high over loading ability and its sequential course can reach to 115% of rated capability.

Description

technical field [0001] The invention relates to a method for manufacturing a rectifier transformer, which belongs to the technical field of transformers. Background technique [0002] At present, the rectifier transformer that supplies power to the three-phase AC-AC frequency conversion speed control system generally adopts the power supply mode of three double-winding transformers each with a phase rectifier, which will inevitably lead to a large area occupied by the power supply equipment and a large workload for equipment maintenance. For this reason, the concept of three cracking transformers was proposed. The so-called three-cracking transformer refers to the use of a three-column core 1, and three low-voltage windings a1~a3, b1~b3, c1~c3 and three high-voltage windings A1~A3, B1~B3, C1~C3. The three low-voltage windings are arranged axially, leading out three low-voltage leads respectively; the three high-voltage windings are also arranged axially, and the three-way ...

AI Technical Summary

Problems solved by technology

When the three low-voltage windings on each core column are arranged axially, due to the influence of self-inductance and mutual inductance, the short-circuit impedance value of the three parallel high-voltage windings on each core column to the three low-voltage windings on the core column hard to match

If the difference between the three short-circuit impedance values ​​is too large, there will be a large circulating current among the parallel branches of the three high-voltage windings inside the transformer during operation, resulting in local overheating of the transformer, and uneven distribution of short-circuit current during short-circuit, resulting in a decline in the short-circuit resistance of the transformer.

Due to the existence of the above technical problems, the three-cracking transmission rectifier transformer has not been really used in practice.

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