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:
Jan. 29, 2013
Filed:
Dec. 08, 2010
Yoshitaka Iwaji, Hitachinaka, JP;
Yasuhiko Kokami, Takasaki, JP;
Minoru Kurosawa, Yoshii, JP;
Junnosuke Nakatsugawa, Hitachi, JP;
Yoshitaka Iwaji, Hitachinaka, JP;
Yasuhiko Kokami, Takasaki, JP;
Minoru Kurosawa, Yoshii, JP;
Junnosuke Nakatsugawa, Hitachi, JP;
Renesas Electronics Corporation, Kawasaki, JP;
Abstract
A control technology for a synchronous motor for suppressing rotational pulsation caused by variation in individuals without making a control algorithm complex is provided. In a motor drive system which is a control device for a synchronous motor, in order to suppress the pulsation component of N times as high as the AC frequency for driving the synchronous motor, a controller in which the phase property of the disturbance response of the controller with respect to the pulsation frequency is within ±45° is arranged. Therefore, the torque pulsation component generated from distortion in induction voltage or variation between phases is suppressed.