Title:
TRANSFORMER MODULE
Document Type and Number:
Japanese Patent JP3904442
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To achieve reduction in size and cost by avoiding the lowering of common mode noise restraining function of a common-mode chock without using an automatic transformer even if it is used in a transmission line of DC superposition.
SOLUTION: In a transformer module with a built-in pulse transformer PT and a common-mode chock CMC: an intermediate tap CT is provided to one winding 2 of the pulse transformer PT; a pair of first and second windings W1, W2 and a third winding W3 having the same number of turns as the windings W1, W2 are provided to the common-mode chock CMC; both ends of the winding 2 of the pulse transformer PT are connected to one-side ends of the first and second windings W1, W2, respectively; the intermediate tap CT is connected to one end of the third winding 3; and magnetic flux formed by currents of the first and second windings W1, W2 and magnetic flux formed by a current of the third winding W3 are cancelled.
Inventors:
Hirofumi Aso
Kinoshita Kazu
Mitsutaka Yasuda
Hiroshi Sasai
Tadashi Fukuda
Kinoshita Kazu
Mitsutaka Yasuda
Hiroshi Sasai
Tadashi Fukuda
Application Number:
JP2001380923A
Publication Date:
April 11, 2007
Filing Date:
December 14, 2001
Export Citation:
Assignee:
tdk Corporation
International Classes:
H01F19/04; H01F17/06; H03H7/09; (IPC1-7): H01F19/04; H03H7/09
Domestic Patent References:
| JP2000286126A | ||||
| JP10135049A | ||||
| JP9180941A | ||||
| JP9162036A | ||||
| JP2118914U | ||||
| JP54137626A |
Foreign References:
| WO1997047083A2 |
Attorney, Agent or Firm:
Takashi Murai
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