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:
Jul. 28, 2009
Filed:
Oct. 19, 2005
Narifumi Tojima, Yokohama, JP;
Takashi Majima, Yokohama, JP;
Mitsunao Sakamoto, Tokyo, JP;
Tetsuya Fukumoto, Sagamihara, JP;
Narifumi Tojima, Yokohama, JP;
Takashi Majima, Yokohama, JP;
Mitsunao Sakamoto, Tokyo, JP;
Tetsuya Fukumoto, Sagamihara, JP;
IHI Corporation, , JP;
Abstract
An object of the present invention to accurately and reliably detect rotational positions of a rotor irrespective of noise overlapping inductor voltage. Employed for accomplishing the aforementioned object in the present invention is a motor-driving device for rotating and driving a rotor by supplying predetermined drive signals to stator coils each corresponding to each phase of a DC brushless motor, the device comprising: a drive-signal-generating unit for generating the drive signals by switching direct current power based on a pulse-control signal; and a control-signal-generator unit for generating the pulse-control signal that controls the drive-signal-generating unit by intermittently generating the pulse-control signal; and for detecting the rotational position and the rotational velocity of the rotor based on inductor voltage obtained from the stator coils in a period in which generation of the pulse-control signal is suspended in each phase.