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:
Jun. 23, 2015
Filed:
Jan. 11, 2012
Takashi Yamaguchi, Tokyo, JP;
Toru Kakebayashi, Tokyo, JP;
Takashi Yamaguchi, Tokyo, JP;
Toru Kakebayashi, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
A LPF extracts DC component of a current detection value of an inverter input current. A subtracting sectioncalculates a difference between a current command value and the DC component of the current detection value. A current controllerproduces two-phase PWM signals Sa and Sb complementary to each other, from the current difference. Further, an integrating circuitintegrates output terminal voltages Vu, Vv and Vw of the inverter to convert the output terminal voltages Vu, Vv and Vw into a magnetic-flux information Φu, Φv and Φw. A logic conversion sectionconverts the magnetic-flux information Φu, Φv and Φw into 120-degree conduction patterns S'-S′ to output the 120-degree conduction patterns S′-S′. Then, a logic circuit sectionexecutes a logic synthesis between the PWM signals Sa and Sb and the 120-degree conduction patterns S′-S′ to output gate signals S-S