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:
Jun. 25, 2013
Filed:
Jun. 29, 2011
Yoshio Akaishi, Hitachinaka, JP;
Yasuo Noto, Hitachinaka, JP;
Koichi Yahata, Hitachinaka, JP;
Hirokazu Matsui, Hitachiota, JP;
Yoshio Akaishi, Hitachinaka, JP;
Yasuo Noto, Hitachinaka, JP;
Koichi Yahata, Hitachinaka, JP;
Hirokazu Matsui, Hitachiota, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
According to the present invention, an electrical power conversion system includes: a motor; an inverter circuit that outputs three-phase (U-phase, V-phase, W-phase) alternating currents to the motor; a current sensor that detects each of the three-phase alternating currents; and a control circuit that controls the inverter circuit based on a torque command value and values detected by the current sensor, so that the three-phase alternating currents outputted from the inverter circuit are formed as sine waves; and wherein the control circuit includes: a current component extraction unit that, based on the values detected by the current sensor, for each phase, extracts current components superimposed upon each of three-phase alternating currents; and an AC current abnormality detection unit that detects abnormality of an AC current flowing to the motor, based on the phases of the current components for any two phases among the three-phase alternating currents.