Resonant transformer

Abstract

The invention provides a resonant transformer, which comprises a first magnetic core, a second magnetic core, a secondary coil, a primary coil, a spacer and a bottom plate, and is characterized in that the first magnetic core is fixedly arranged on the bottom plate, the second magnetic core is arranged at the top end of the first magnetic core, and the secondary coil is wound on a central column of the first magnetic core; the primary coil is wound on the central column of the second magnetic core, the spacers are arranged between the secondary coil and the primary coil and between the secondary coil and the corresponding central column of the magnetic core, and the secondary coil comprises three secondary pins. A double-layer winding cake reverse lap winding structure formed by winding aplurality of strands of self-adhesive three-layer insulated wires is adopted as the primary coil, and the secondary coil is formed by overlapping a plurality of copper sheets, so that the leakage inductance between the primary coil and the secondary coil can be effectively reduced, the loss of the resonant transformer is reduced, and the working efficiency of the power supply is improved; meanwhile, the overall structure is scientific, reasonable, simple, compact and convenient to install and operate. Theresonant transformer is widely suitable for switching power supply voltage transformationmatching use.

Description

technical field [0001] The invention relates to power supply equipment, in particular to a resonant transformer. Background technique [0002] Switch mode power supply is referred to as SMPS, also known as switching power supply and switching converter. Converted to the voltage or current required by the user end, the input of the switching power supply is mostly AC power, and the output is mostly DC power. [0003] With the development of electronic circuits and switching power supplies in the direction of high frequency, high power, high reliability, and high integration, and the continuous reduction of the size of high-speed ultra-large-scale integrated circuits, users have put forward higher requirements for the performance of DC power supplies , in order to design a high-power DC switching power supply that meets the requirements, the method of using an LLC resonant transformer in the switching power supply is generally adopted, but the overall structure of the existin...

AI Technical Summary

Problems solved by technology

[0003] With the development of electronic circuits and switching power supplies in the direction of high frequency, high power, high reliability, and high integration, and the continuous reduction of the size of high-speed ultra-large-scale integrated circuits, users have put forward higher requirements for the performance of DC power supplies , in order to design a high-power DC switching power supply that meets the requirements, the method of using an LLC resonant transformer in the switching power supply is generally adopted, but the overall structure of the existing resonant transformer is complex, and the leakage inductance between the primary coil and the secondary coil is large , leading to a large loss in the resonant transformer, which seriously restricts the improvement of the power supply efficiency

Images