A Method of Improving the Leakage Inductance of Variable Frequency Transformer
A variable frequency transformer and leakage inductance technology, which is applied in the field of transformers, can solve the problems of increasing the volume of variable frequency transformers and achieve the effect of improving leakage inductance
Active Publication Date: 2017-11-17
TIANJIN KUNPENG ELECTRONICS
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Problems solved by technology
[0003] As we all know, the leakage inductance is an important parameter to measure the performance index of the variable frequency transformer. At present, in order to improve the leakage inductance of the variable frequency transformer, the technical means often used by engineers is to extend the length of the iron core. Obviously, the result of this traditional method is the frequency conversion The size of the transformer increases dramatically
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[0023] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0024] see figure 1 with figure 2 , a method for improving the leakage inductance of a variable frequency transformer, comprising the steps of:
[0025] Step 101, winding the primary coil 1 and the secondary coil 3;
[0026] Step 102, stacking N rectangular silicon steel sheets on a yoke 2 with a cuboid structure; the length of the yoke 2 is equal to the stacked thickness of the main core of the frequency conversion transformer, and the width of the yoke 2 is not greater than the width of the wire package; The thickness of each silicon steel sheet is 0.35mm; where N is a natural number not less than 2;
[0027] Step 103, in order to prevent short circuit between the coils, between the yoke and the coil, and between the yoke 2 and the iron...
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Abstract
The invention discloses a method for improving the leakage inductance of a variable frequency transformer, comprising the following steps: step 101, winding a primary coil and a secondary coil; step 102, stacking N rectangular silicon steel sheets on a cuboid yoke; step 103 1. Bind the yoke iron with insulating tape, then impregnate the insulating varnish, and finally dry it; step 104, the iron core of the frequency conversion transformer is a U-shaped iron core; the primary coil is inserted on a core column of the U-shaped iron core, and the secondary The coil is inserted on another iron core column of the U-shaped iron core; step 105, install the closed iron core; step 106, adjust the iron core gap, the gap between the primary coils, and the gap between the secondary coils; step 107, put the high frequency The transformer is impregnated with insulating varnish and dried. By adopting the above technical solution, the present invention can well improve the leakage inductance of the frequency conversion transformer without increasing the volume of the frequency conversion transformer.
Description
technical field [0001] The invention relates to the technical field of transformers, in particular to a method for improving the leakage inductance of a variable frequency transformer. Background technique [0002] At present, with the rapid development of society, the demand for variable frequency transformers is increasing. Variable frequency transformers (variable frequency transformers, VFT) are a new type of flexible AC transmission system equipment that can connect to asynchronous power grids. Frequency conversion transformer is a new type of asynchronous grid interconnection device that integrates technologies such as transformer, phase shifter, hydro-generator, double-fed motor and DC drive. The core component is a resolver with single-phase windings on both the stator and rotor sides. , and adjust the phase displacement of the rotor magnetic field relative to the stator magnetic field through the DC motor drive system, thereby controlling the magnitude and direction...
Claims
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IPC IPC(8): H01F41/02H01F41/04H01F27/26H01F27/30
Inventor 丁振华端木永亮
Owner TIANJIN KUNPENG ELECTRONICS