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:
Sep. 22, 1998
Filed:
Nov. 14, 1996
Mikihiro Kondoh, Okazaki, JP;
Kaneyoshi Nagatani, Kariya, JP;
ASMO Co., Ltd., Kosai, JP;
Denso Corporation, Kariya, JP;
Abstract
Electric current supplied to a DC motor and a rotational speed thereof are measured. An inductive voltage is calculated based on a relationship that the elapse of time after the application of a voltage to the DC motor is stopped is proportional to the voltage across the terminals of the DC motor. The electric current supplied to the DC motor when the rotation of the DC motor is locked is measured by applying the voltage to the DC motor when a magnetic pole of a stator of the DC motor is not magnetized. The torque of the DC motor when the rotation of the DC motor is locked is measured based on the electric current supplied to the DC motor and the rotational speed thereof when it rotates, the electric current supplied to the DC motor when the rotation of the DC motor is locked, and the inductive voltage. The torque of the DC motor when the rotation of the DC motor is locked is used to determine the torque characteristics thereof.