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:
Feb. 14, 2006
Filed:
Jun. 06, 2005
Shigeru Furuki, Tokyo, JP;
Shigeru Furuki, Tokyo, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A motor drive control apparatus includes a motor, a power supply, a control circuit, a first current detector, a first switching element, and a second switching element. The first current detector generates a first detection voltage indicating a first current flowing through the motor in one direction. The control circuit generates a PWM voltage and generates an ON voltage if the first detection voltage is lower than or equal to a first specified input voltage, and the control circuit generates an OFF voltage and generates the PWM voltage if the first detection voltage is higher than the first specified input voltage to adjust a pulse duty of the PWM voltage in accordance with a difference voltage between the first detection voltage and the first specified input voltage and to control the current flowing through the motor so as to be equal to a target current.