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. 02, 2013
Filed:
Jan. 19, 2011
Kazuaki Tobari, Hitachiota, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Junnosuke Nakatsugawa, Hitachi, JP;
Rikio Yoshikawa, Numazu, JP;
Masamichi Yagai, Mito, JP;
Kazuaki Tobari, Hitachiota, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Junnosuke Nakatsugawa, Hitachi, JP;
Rikio Yoshikawa, Numazu, JP;
Masamichi Yagai, Mito, JP;
Kokusan Denki Co., Ltd., Shizuoka, JP;
Abstract
A torque ripple suppression control device for a permanent magnet motor includes a current command conversion unit that outputs a current command value, a position detector that detects a rotational position of the permanent magnet motor, a current detection unit that detects a current at the permanent magnet motor, an induced voltage coefficient setting unit that outputs an information signal related to an induced voltage coefficient for an induced voltage at the permanent magnet motor, a torque ripple suppression operation unit that outputs a current correction command value for the permanent magnet motor, a current control operation unit that outputs a voltage command value based upon addition results obtained by adding together the current command value and the current correction command value and the current detection value, and a power converter that outputs a voltage with which the permanent magnet motor is to be driven.