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:
Aug. 14, 2007
Filed:
Jan. 04, 2005
Shinichi Kono, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Masami Kimijima, Yamanashi, JP;
Mamoru Yaeshima, Kanagawa, JP;
Shinichi Kono, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Masami Kimijima, Yamanashi, JP;
Mamoru Yaeshima, Kanagawa, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
A motor driver capable of detecting the insulation deterioration of a motor easily and inexpensively is disclosed. The voltage supplied from an AC power supply () is rectified by a first rectifying circuit (Dto D) and smoothed by a capacitor (C) in a power supply unit (). The output voltage of the power supply unit () is converted into an AC voltage of a frequency and a motor (M) is driven by a motor drive amplifier (). Elements (RCRC) are connected between at least one of the positive electrode () and the negative electrode () of the output line () of the power supply unit () and the ground (GG). An insulation deterioration circuit () detects at least one of the voltage between the elements and the current flowing through the elements.