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. 05, 2022
Filed:
May. 14, 2018
Sinfonia Technology Co., Ltd., Tokyo, JP;
Makoto Maruyama, Tokyo, JP;
Sinfona Technology Co., Ltd., Tokyo, JP;
Abstract
A control devicefor a synchronous electric motor that switches a drive control of the synchronous electric motor to a PWM drive control and a rectangular wave drive control includes a PWM signal generatorconfigured to generate a PWM signal, a rectangular wave signal generatorconfigured to generate a rectangular wave signal, a rotation speed detectorconfigured to detect a rotation speed of the motor, a signal switching determination partconfigured to determine, according to at least the rotation speed, whether the PWM signal or the rectangular wave signal is used as a control signal when controlling the drive of the motor, and a drive controllerconfigured to control the drive of the motorusing a signal determined by the signal switching determination partto be used as the control signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile