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. 11, 2021
Filed:
Jun. 05, 2017
Kobe Steel, Ltd., Kobe, JP;
Kobelco Construction Machinery Co., Ltd., Hiroshima, JP;
Hiroaki Kawai, Shinagawa-ku, JP;
Takashi Hiekata, Kobe, JP;
Koji Inoue, Kobe, JP;
Takashi Tokuyama, Kobe, JP;
Hiroshi Hashimoto, Kobe, JP;
Toshiaki Shimoda, Kobe, JP;
Shintaroh Sasai, Hyogo, JP;
Tetsuya Ogawa, Hyogo, JP;
Toshiro Yamashita, Hyogo, JP;
Kobe Steel, Ltd., Kobe, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima, JP;
Abstract
An output-torque estimation unit obtains a value of a current input to a motor, from a power converter, and calculates an estimated output torque value which is an estimated value of output torque of the motor, from the obtained value of the current. A load estimation unit estimates a load value of a hanging cargo based on the estimated output torque value which is calculated by the output-torque estimation unit, a speed reduction ratio of a speed reducer, an effective radius of a winch drum, and the winding number which is set by the number setting unit.