The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2002
Filed:
Jun. 15, 2001
Hiroshi Mochikawa, Tokyo, JP;
Junichi Tsuda, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
There are provided: a main three-phase full-wave rectifier ( ) that converts three-phase AC (R phase, S phase, T phase) into DC; a transformer ( ) that outputs AC of a total of six phases corresponding to the points that equally divide by three the arcs drawn in a transformer vector diagram in which an equilateral triangle is formed whereof the R phase, S phase and T phase are vertices, centered on each vertex and linking the remaining two points; and two auxiliary three-phase full-wave rectifiers ( ) and ( ) in that convert into DC the six-phase AC that is output from the transformer ( ), the output lines of the main three-phase full-wave rectifier ( ) and two auxiliary three-phase full-wave rectifiers ( ) and ( ) being connected in parallel. The current flowing in the DC line through the transformer can therefore be reduced to ⅓ of the whole in the case of an 18-pulse rectifier, so enabling the capacity of the transformer to be reduced.