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:
Apr. 05, 2011
Filed:
Aug. 18, 2008
Shigehisa Aoyagi, Hitachi, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Kazuaki Tobari, Hitachiota, JP;
Kiyoshi Sakamoto, Hitachinaka, JP;
Donsheng LI, Hitachi, JP;
Shigehisa Aoyagi, Hitachi, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Kazuaki Tobari, Hitachiota, JP;
Kiyoshi Sakamoto, Hitachinaka, JP;
Donsheng Li, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Ibaraki, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
A semiconductor power converter includes a power converter for converting direct current to three-phase alternating current or vice versa; a means for detecting a current in an alternating current side of the power converter; a means for providing a current reference in the alternating current side of the power converter; a current controller for calculating a voltage reference in the alternating current side of the power converter to match the current reference and a value of the detected current; and a pulse width modulation means for controlling the power converter through pulse width modulation based on the voltage reference, wherein the current reference is used in place of the value of the detected current for at least one phase current among three phase currents in the alternating current side.