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. 05, 2015
Filed:
Sep. 28, 2011
Applicants:
Toru Tazawa, Osaka, JP;
Masaru Nishizono, Osaka, JP;
Inventors:
Toru Tazawa, Osaka, JP;
Masaru Nishizono, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 29/00 (2006.01); H02P 23/14 (2006.01); H02P 5/00 (2006.01); H02P 6/12 (2006.01); G01R 31/34 (2006.01);
U.S. Cl.
CPC ...
H02P 29/00 (2013.01); H02P 6/12 (2013.01); G01R 31/34 (2013.01); H02P 23/14 (2013.01);
Abstract
A motor constant calculating method for a PM motor according to the present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step of detecting a motor current flowing depending on the applied voltage applied in the voltage applying step, and a motor constant calculating step of calculating a motor constant of the PM motor based on the applied voltage and the motor current.