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:
Dec. 31, 2013
Filed:
Jan. 21, 2010
Joji Noie, Ota, JP;
Toshiyuki Imai, Ora-gun, JP;
Takahiro Iida, Ora-gun, JP;
Tetsuya Yoshitomi, Ora-gun, JP;
Joji Noie, Ota, JP;
Toshiyuki Imai, Ora-gun, JP;
Takahiro Iida, Ora-gun, JP;
Tetsuya Yoshitomi, Ora-gun, JP;
SANYO Semiconductor Co., Ltd., Gunma, JP;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
The invention provides a motor with a low speed start function and a soft start function. The motor includes a first pulse generation circuit generating a first pulse signal of which a first duty ratio of one of logic levels is increased as a drive voltage corresponding the target rotation speed of the motor is increased, a second pulse generation circuit generating a second pulse signal of which a second duty ratio of one of logic levels is different from the first duty ratio, and a drive control circuit supplying a drive current to a motor coil at the second duty ratio in order to start the rotation of the motor that is stopping and supplying a drive current to the motor coil at the first duty ratio after a predetermined time passes from the start of the rotation of the motor in response to a rotation signal corresponding to the rotation of the motor.