Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2007-03-13
2007-03-13
Masih, Karen (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S254100, C318S132000, C318S434000
Reexamination Certificate
active
10537054
ABSTRACT:
It is an object of the invention to provide a torsional vibration suppressing apparatus further including an inertia control portion capable of suppressing a feeble vibration in a torsional vibration suppressing control portion.The invention includes inertia control means (29) for calculating and outputting an inertia control signal TMJCfrom an electric motor acceleration torque signal TMAFBobtained by multiplying a signal acquired by differentiating an electric motor mean speed signal NMAVGby an inertia time constant τMof the electric motor portion, electric motor acceleration torque control means (28) for calculating a torque command compensation signal TRFLfrom a deviation signal of a signal TRFAXobtained by decreasing TMJCfrom a torque command signal TRFAand the electric motor acceleration torque signal TMAFB, and electric motor torque control means for controlling a current of the electric motor in order to obtain an electric motor torque in accordance with a torque command TRFMto be a sum of TRFAand TRFL.
REFERENCES:
patent: 5545957 (1996-08-01), Kubo et al.
patent: 8-168281 (1996-06-01), None
patent: 9-121580 (1997-05-01), None
patent: 3173007 (2001-06-01), None
Ikeguchi Masao
Shibata Naotake
Sonoda Keisuke
Toujinbara Hirotaka
Kabushiki Kaisha Yaskawa Denki
Masih Karen
Sughrue & Mion, PLLC
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