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US 9,312,061 B2Granted
Pulse transformer
AssigneeTDK Corporation
InventorsNobuo Takagi, Setu Tsuchida, Tasuku Mikogami, Tomonao Suto
Life of this patent
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Abstract
Disclosed herein is a pulse transformer that includes a drum core having a winding core portion and first and second flange portions, a plate core connected to the first and second flange portions, and a plurality of wires that are wound around the winding core portion. The first and second flange portions and the plate core are ground such that an inductance of the pulse transformer is 350 μH or more when a bias current of 8 mA is applied to the wires.
Claims23
A pulse transformer comprising:
- a drum core that includes a winding core portion, and first and second flange portions that are provided at both ends of the winding core portion, respectively;
- a plate core that includes a bottom surface having first and second portions, the first portion of the bottom surface facing to a top surface of the first flange portion, and the second portion of the bottom surface facing to a top surface of the second flange portion;
- first and second wires that are wound around the winding core portion, the first and second wires constituting a primary winding;
- and
- third and fourth wires that are wound around the winding core portion, the third and fourth wires constituting a secondary winding,
- the top surface of the first flange portion, the top surface of the second flange portion, the first portion, and the second portion being ground such that an inductance becomes equal to or higher than 350 μH when a bias current of 8 mA is applied to the first and second wires.
3 more elements
A pulse transformer comprising:
- a drum core that includes a winding core portion having first and second ends, a first flange portion connected to the first end of the winding core portion, and a second flange portion connected to the second end of the winding core portion;
- a plate core that includes a first portion contacting to the first flange portion without an intervention of an adhesive such that an average gap length therebetween is 0.60 μm or more and 0.75 μm or less and a second portion contacting to the second flange portion without an intervention of an adhesive such that an average gap length therebetween is 0.60 μm or more and 0.75 μm or less;
- and
- a plurality of wires that are wound around the winding core portion.
1 more element
A pulse transformer comprising:
- a drum core that includes a winding core portion having first and second ends, a first flange portion connected to the first end of the winding core portion, and a second flange portion connected to the second end of the winding core portion;
- a plate core that includes a first portion contacting to a top surface of the first flange portion without an intervention of an adhesive and a second portion contacting to a top surface of the second flange portion without an intervention of an adhesive;
- and
- a plurality of wires that are wound around the winding core portion,
- wherein a surface roughness of the top surfaces of the first and second flange portions is 0.1 or more and 0.2 or less, and a surface roughness of the first and second portions is 0.05 or more and 0.1 or less.
2 more elements
Dependencies are inferred from the claim text.