Abstract: A transformer includes a bobbin, an I-bar, the first U-core, and the second U-core. The bobbin in a tube shape is wrapped around by a number of windings of copper coil. An I-bar made of high permeable alloy has a first end and a second end. The I-bar is inserted into the bobbin and the first end and the second end of the I-bar protrude outside the tube of the bobbin respectively. A first U-core made of high permeable alloy is placed on one side of the bobbin and a second U-core made of high permeable alloy is placed on the other side of the bobbin. The two ends of the first U-core and the second U-core connect the I-bar through the films and the sunken parts of the first U-core and the second U-core are in opposition to each other.

Abstract: A bobbin of a transformer includes a hollow sleeve, a first pin set, a partition, and a second pin set. The hollow sleeve is a hollow polyhedron, and the hollow sleeve is wrapped around by a number of the copper coils. A winding-started point is near the corner of the hollow sleeve. The pin set includes a first pin and a first griding slot, wherein the first pin is for being wrapped around by a starting point of the first copper wire, and the first griding slot is for placing the copper wire segment from the starting point to the winding-started point. The partition is for connecting the hollow sleeve and the first pin set. The corner of the hollow sleeve is an intersection point of a top plane the hollow sleeve, a side plane of the hollow sleeve, and the partition. The transformer bobbin of the invention can prevent the short circuit and raise the yield of the transformer.

Abstract: The present invention provides a transformer with high coupling efficiency including a substrate, a bobbin, and a device. The substrate with M sets of pads and M sets of lower conducting wires is defined to have a front surface and a rear surface. Each pad on the substrate is provided as a connecting point for the front surface and the rear surface of the substrate. Each set of pads includes a first pad and a second pad connecting to each other by one corresponding lower conducting wire. The bobbin functioning as a winding reel for the high-voltage conducting wire is provided on the substrate. A device including N sets of upper conducting wires is disposed on the bobbin. Each set of upper conducting wire connect the first pad of one set of pads with the second pad of another set of pads adjacent to the one set of pads to form a low-voltage winding loop on the device and the rear surface of the substrate.

Abstract: A bobbin of a transformer includes a hollow sleeve, a first pin set, a partition, and a second pin set. The hollow sleeve is a hollow polyhedron, and the hollow sleeve is wrapped around by a number of the copper coils. A winding-started point is near the corner of the hollow sleeve. The pin set includes a first pin and a first griding slot, wherein the first pin is for being wrapped around by a starting point of the first copper wire, and the first griding slot is for placing the copper wire segment from the starting point to the winding-started point. The partition is for connecting the hollow sleeve and the first pin set. The comer of the hollow sleeve is an intersection point of a top plane the hollow sleeve, a side plane of the hollow sleeve, and the partition. The transformer bobbin of the invention can prevent the short circuit and raise the yield of the transformer.

Abstract: A transformer includes a bobbin, an I-bar, the first U-core, and the second U-core. The bobbin in a tube shape is wrapped around by a number of windings of copper coil. An I-bar made of high permeable alloy has a first end and a second end. The I-bar is inserted into the bobbin and the first end and the second end of the I-bar protrude outside the tube of the bobbin respectively. A first U-core made of high permeable alloy is placed on one side of the bobbin and a second U-core made of high permeable alloy is placed on the other side of the bobbin. The two ends of the first U-core and the second U-core connect the I-bar through the films and the sunken parts of the first U-core and the second U-core are in opposition to each other.