Abstract: The disclosure provides a preparation method of a porous copper alloy wick, including the steps of: a) preparing an electrolyte, which is an aqueous solution including 0.5-1.8 mol/L sulfuric acid and 0.1-0.5 mol/L copper sulfate; b) cleaning with a mixed solution of a surfactant and a basic compound, activating with dilute hydrochloric acid and then cleaning the surface of a copper alloy substrate; c) forming a porous structure on the substrate by electrodeposition on the treated substrate in the electrolyte; and d) washing with water, drying and then sintering the product obtained in step c). By the method of the disclosure, the porous structure with the specific arrangement, excellent capillary force and permeability can be directly obtained on the surface of the substrate, which is good for the transmission of the working liquid.

Abstract: The disclosure provides a method for preparing a porous wick, including the steps of: a) preparing an first electrolyte, which is an aqueous solution including 0.5-1.8 mol/L sulfuric acid and 0.1-0.5 mol/L copper sulfate; b) preparing a second electrodeposition electrolyte, which is an aqueous solution including 0.2-0.9 mol/L sulfuric acid and 0.4-0.9 mol/L copper sulfate; c) cleaning the surface of a metal substrate with a mixed solution of a surfactant and a basic compound, activating with dilute hydrochloric acid, and then rinsing; and d) carrying out a first elctrodeposition on the treated substrate in the first electrodeposition electrolyte, and then carrying out the second electrodeposition in the second electrodeposition electrolyte, wherein the second electrodeposition current density is smaller than the first electrodeposition current density.

Abstract: The present disclosure provides a wrapping method for the common inductor. The common mode inductor includes a first coil winding and a second coil winding. The wrapping method for a common mode inductor includes steps of: disposing two isolation blocking sheets at different positions of a magnetic core; wrapping the first coil winding around the magnetic core, wherein the first coil winding is divided into two wrapping areas by one of the isolation blocking sheets; wrapping the second coil winding around the magnetic core, wherein the second coil winding is divided into two wrapping areas by the other one of the isolation blocking sheets, wherein the first coil winding and the second coil winding are symmetrically wrapped.

Abstract: The present disclosure provides a switching power supply, an EMI filter, a common mode inductor and a wrapping method for the common mode inductor. The common mode inductor includes a first coil winding and a second coil winding. The wrapping method for a common mode inductor includes steps of: disposing two isolation blocking sheets at different positions of a magnetic core; wrapping the first coil winding around the magnetic core, wherein the first coil winding is divided into two wrapping areas by one of the isolation blocking sheets; wrapping the second coil winding around the magnetic core, wherein the second coil winding is divided into two wrapping areas by the other one of the isolation blocking sheets, wherein the first coil winding and the second coil winding are symmetrically wrapped.

Abstract: The present application provides a transformer, a transformer winding component and manufacturing methods thereof. The transformer winding component comprises a bobbin and at least two windings, wherein the bobbin includes a cylinder, and the at least two windings are wound on the outside of the cylinder. The at least two windings are sequentially disposed from inside to outside relative to the cylinder, and comprise a first fold winding. The transformer winding component further comprises an insulation layer and a fold tape. The insulation layer is adjacently disposed on the outside of the first fold winding. A portion of fold tape is located on the inner side of the first fold winding, and another portion of fold tape is located on the outside of the insulation layer. The transformer comprises a core and the transformer winding component.

Abstract: The present disclosure provides a wrapping method for the common mode inductor. The common mode inductor includes a first coil winding and a second coil winding. The wrapping method for a common mode inductor includes steps of: disposing two isolation blocking sheets at different positions of a magnetic core; wrapping the first coil winding around the magnetic core, wherein the first coil winding is divided into two wrapping areas by one of the isolation blocking sheets; wrapping the second coil winding around the magnetic core, wherein the second coil winding is divided into two wrapping areas by the other one of the isolation blocking sheets, wherein the first coil winding and the second coil winding are symmetrically wrapped.

Abstract: The present disclosure provides a switching power supply, an EMI filter, a common mode inductor and a wrapping method for the common mode inductor. The common mode inductor includes: a magnetic core; two multilayered coil windings symmetrically wrapped around the magnetic core; and two isolation gaps each of which is formed in respective one of the two multilayered coil windings, and is configured to divide, by beginning from a first layer, the respective one of the multilayered coil windings into two wrapping areas.