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:
May. 12, 2026
Filed:
Oct. 13, 2022
Toshiba Mitsubishi-electric Industrial Systems Corporation, Tokyo, JP;
Abstract
A phase angle detection system according to one aspect of the embodiment detects a phase angle of an electric motor in a drive system provided with a transmission unit that changes a rotation speed of the electric motor. The phase angle detection system includes a first sensor, a second sensor, and an arithmetic processing unit. The first sensor outputs a first signal for detecting at least a specific phase angle of a rotor of the electric motor. The second sensor outputs a second signal capable of detecting an amount of rotation of an output axis of the transmission unit. The arithmetic processing unit calculates, with an amount of deviation included in a result of the detection of a specific phase angle by the first signal defined for each rotational direction of the electric motor in advance, an estimated value of an absolute angle of the rotor of the electric motor using the amount of deviation of the first signal determined by a rotational direction of the electric motor, a result of the detection of the first signal, and the second signal.