Leakage inductance adjustment structure of thin resonant transformer

Abstract

The invention discloses a leakage inductance adjustment structure of a thin resonant transformer. The wire frame has a hollow winding column, and a top plate and a bottom plate respectively extend up and down. The top plate and the bottom plate are respectively provided with corresponding first through holes and second through holes. The inner coil It is wound on the winding column, and the upper and lower ends of the magnetic conductive sheet are pressed tightly in the first perforation and the second perforation respectively. The side columns respectively cover the two sides of the wire frame and lean against each other, thereby, the outer coil and the inner coil form the first magnetic conduction circuit through the iron core, and the magnetic conduction sheet is interposed between the secondary coil and the primary coil to form the first magnetic conduction circuit. The second magnetic conduction circuit achieves the structure that the resonant transformer generates leakage inductance with required strength through the magnetic conduction sheet.

Description

technical field [0001] The invention relates to a thin resonant transformer, in particular to a thin resonant transformer that maintains the existing volume of the resonant transformer, can be quickly assembled, has good magnetic permeability coverage, high magnetic shielding, and has a leakage inductance adjustment structure. Background technique [0002] The leakage inductance is generated because the coupling coefficient between the primary side coil and the secondary measurement coil in the transformer is less than 1, so that some coils of the transformer will not have a voltage transformation effect, and the inductance generated by this part of the coil is the leakage inductance; resonance The basic formula of the transformer is ω=1 / √(LC), where ω is the angular frequency of the power supply = 2πf, L and C are the inductance and capacitance of the LLC resonant tank. The resonant frequency f often has different settings due to different applications. In order to meet the...

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Problems solved by technology

[0005] 2. In the pin design of common transformers, most of them are arranged on both sides of the transformer winding frame respectively, so as to separate the distance between the primary and secondary lead pins, and when the circuit board circuit layout is designed, it can avoid the gap between the lines. Signal interference, however, the side plate of the M560684 case is not the basic structure of the transformer winding frame. Therefore, after the side plate is installed on one side of the transformer, the lead terminal group can only be set on the other side of the transformer, because the primary side coil of the transformer ( Also known as excitation coil, primary side coil, etc.), the current is mostly larger than that of the secondary side coil (also known as induction coil, secondary side coil, etc.), therefore, between the first and second lead terminal groups of the lead terminal group, it is quite easy to generate Signal interference, also because the distance between the lead terminal groups is too close, resulting in insufficient insulation

", also refer to the above mentioned: "In the primary side coil and / or the secondary side coil wire, at least one turn will be wound around the hollow winding part and the side winding part at the same time", if the winding frame is integrated Forming and not using the side plate, but directly forming the side hole of the iron core, there will be no space between the primary and secondary side coils for the first and second iron core side columns to pass through, that is, the M560684 case image 3 Among them, if the side plate is removed, the secondary side coil will directly lean against the side coil. The more important reason is that no matter what kind of transformer, the winding frame is to wind the primary and secondary side coils first. After that, the iron core is assembled. Therefore, the M560684 case cannot actually be integrally formed to directly form the structure of the middle hole of the iron core and the side hole of the iron core.

[0008] 5. The first and second iron cores of the M560684 case must extend the first and second magnetizers in order to match the iron core side holes of the winding frame, and then set the first and second iron cores on the corresponding surfaces of the first and second magnetizers The side column can only be penetrated into the side hole of the iron core by extending the distance of the first and second iron core side columns by the first and second magnetizers. The above structure causes the structure change of the first and second iron core. The side columns of the iron core protrude from the iron core and are too slender. There is a great risk of damage and deformation during production, which leads to an increase in production costs; A recessed gap is formed on the other side of the magnet, and the magnetic field generated by the primary and secondary side coils between the gaps is actually divergent to the outside, and will not pass through the first and second cores, reducing the overall transformer Magnetic shielding effect

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