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. 04, 2017
Filed:
Apr. 16, 2015
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Inventors:
Toshiyuki Ajima, Tokyo, JP;
Kimihisa Furukawa, Tokyo, JP;
Tohma Yamaguchi, Hitachinaka, JP;
Hiroki Takeda, Hitachinaka, JP;
Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 5/00 (2006.01); H02P 21/00 (2016.01); B62D 5/04 (2006.01); H02P 21/14 (2016.01); H02M 7/5395 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
B62D 5/046 (2013.01); H02M 7/5395 (2013.01); H02P 21/14 (2013.01); B62D 5/0463 (2013.01); H02M 2001/0009 (2013.01);
Abstract
An inverter device includes a source current calculator and an inverter circuit, wherein: the source current calculator calculates an average value of the DC bus current Ical during a PWM cycle through arithmetic operation executed based upon instantaneous values of the DC bus current Idc of the inverter circuit; and the source current calculator provides an estimated value by designating the average current value Ical during the PWM cycle as an input source current Isrc during the PWM cycle.