Medium-high frequency high-power main transformer and preparation method thereof
A main transformer and high-power technology, applied in the field of inverter welding power supply control, to achieve the effect of extending the magnetic force line, improving the coupling effect, and increasing the coupling effect
Pending Publication Date: 2022-01-04
SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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[0006] 3. Double E-type ferrite cores are used, and copper strips are used as the primary and secondary wires of the transformer. The primary and secondary wires are wound first, and the secondary of the transformer is covered with ordinary ferrite magnetic rings. The primary and secondary coupling efficiency of the main transformer and reliability are slightly higher than the previous two solutions, but there is still a lot of room for improvement
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[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0030] A medium-frequency high-power main transformer of this application, such as figure 1 As shown, the primary winding including the transformer adopts double winding, including primary winding A and primary winding B, the non-inverting ends of the two primary windings are located on the same side, and the leads of the two primary windings are independent of each other, and the two primary windings are connected outside the transformer The non-inverting ends of the windings are connected together and the two inverting ends are connected together to form the primary winding of the transformer.
[0031] The secondary winding also adopts double winding, including secondary winding A and secondary winding B. The inverting terminal of secondary winding A is connected with the non-inverting terminal of secondary winding B to form a common terminal. The secondary...
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The invention discloses a medium-high frequency high-power main transformer and a preparation method thereof, and belongs to the technical field of inverter welding power control. The medium-high frequency high-power main transformer adopts a double-E type ferrite material magnetic core, a primary winding and a secondary winding adopt the same copper strip, the innermost layer and the outermost layer of the magnetic core are primary winding layers respectively, a primary winding and a secondary winding alternatively stacked layer is arranged between the innermost layer and the outermost layer, the number of turns of the stacked layer is equivalent to the number of turns of a secondary winding, and a common end is led out of the middle of the secondary winding to form two secondary windings, each secondary winding is sleeved with two microcrystal magnetic rings; and thus, the peak is lowered, further the duty ratio loss is reduced, and the reliability is improved. The secondary winding is surrounded in the middle of the primary winding, so that tight coupling of the primary winding and the secondary winding is realized, and the coupling effect is improved.
Description
technical field [0001] The invention relates to the technical field of inverter welding power supply control, in particular to a medium-frequency high-power main transformer and a preparation method thereof. Background technique [0002] Transformer is one of the most common components in life. It is used in various scenarios. Especially in recent years, switching power supply and inverter power supply have been used more and more, and transformers have also produced more and more types, especially With the rapid development of the inverter arc welding power supply, the market competition is becoming more and more fierce, and users have higher and higher requirements for the price, performance and reliability of the arc welding power supply. In the high-power welding arc welding power supply, industrial machines The working frequency of 50KHZ and above double primary soft switch (or three-level soft switch) is very cost-effective, but the output duty cycle loss of 50KHZ and ...
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IPC IPC(8): H01F27/28H01F27/30H01F41/06
CPCH01F27/28H01F27/306H01F41/06
Inventor 舒振宇黄叶剑李强
Owner SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG