Magnetic leakage shielding method of control transformer

Abstract

The application discloses a magnetic leakage shielding method of a control transformer. The magnetic leakage shielding method comprises the following steps of determining winding layer number of a soft magnetic silicon steel strip according to the capacity of the control transformer; determining the perimeter of an inner window and the area of the inner window of the control transformer according to an area product of the control transformer; determining winding length of the soft magnetic silicon steel strip according to the perimeter of the inner window of the control transformer, the winding layer number of the soft magnetic silicon steel strip and the thickness of the soft magnetic silicon steel strip; and embedding the soft magnetic silicon steel strip in the inner window of the control transformer and then winding the control transformer, wherein the edge of the soft magnetic silicon steel strip is ensured to be flush with the edge of the control transformer. According to the magnetic leakage shielding method, the influence of a leakage magnetic field on a skin effect in a control transformer winding is reduced on the condition that the control transformer conforms to a corresponding load and stable power supply is ensured, the eddy-current loss in the winding during load running of the control transformer is effectively reduced, the service lifetime of an insulation layer of the control transformer is prolonged, and the effects of more efficiency and energy saving are achieved.

Description

technical field [0001] The disclosure relates to the field of transformer manufacturing in the power transmission and transformation industry, in particular to a method for shielding magnetic flux leakage of a control transformer. Background technique [0002] At present, control transformers are widely used in machinery and elevators, which has greatly increased the number of control transformers. When the control transformer is in operation, its loss is mainly composed of the current heat loss of the winding resistance, the eddy current loss in the winding wire, the circulation loss, the loss of the lead wire, and the loss of the structural parts. However, the control transformer produced by the current control transformer manufacturer is almost It is made of EI silicon steel laminations, and there is almost no magnetic flux leakage shielding for the eddy current loss caused by the magnetic flux leakage of the control transformer. It not only causes a large amount of powe...

AI Technical Summary

Problems solved by technology

When the control transformer is in operation, its loss is mainly composed of the current heat loss of the winding resistance, the eddy current loss in the winding wire, the circulation loss, the loss of the lead wire, and the loss of the structural parts. However, the control transformer produced by the current control transformer manufacturer is almost Made of EI silicon steel laminations, there is almost no magnetic flux leakage shielding for the eddy current loss caused by the magnetic flux leakage of the control transformer

It not only causes a large amount of power loss, but also shortens the insulation life of the control transformer

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