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:
Sep. 24, 2013
Filed:
Mar. 30, 2009
Takeshi Ueda, Kashiba, JP;
Yuji Kariatsumari, Yamatotakada, JP;
Shigeki Nagase, Nabari, JP;
Noboru Niguchi, Kashihara, JP;
Hiroshi Sumasu, Kashihara, JP;
Takeshi Ueda, Kashiba, JP;
Yuji Kariatsumari, Yamatotakada, JP;
Shigeki Nagase, Nabari, JP;
Noboru Niguchi, Kashihara, JP;
Hiroshi Sumasu, Kashihara, JP;
JTEKT Corporation, Osaka-shi, JP;
Abstract
A command current setting portion has a target value corrector that calculates d-axis and q-axis current command values idc, iqc that are to be supplied to an open-loop controller, based on d-axis and q-axis current target values id*, iq*. When d-axis and q-axis voltage target value vd*, vq* calculated from the d-axis and q-axis current target values id*, iq* by the motor circuit equations exceed a voltage limit, this target value correctorcorrects the d-axis and q-axis current target values id*, iq* by the field weakening control such that d-axis and q-axis voltages vd, vq and d-axis and q-axis currents id, iq satisfy √(vd+vq)≦Vlim and √(id+iq)≦Ilim respectively. The d-axis and q-axis current command values idc, iqc are obtained by this correction.