Title:
建設機械
Document Type and Number:
Japanese Patent JP6671851
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a construction machine capable of solving an unbalanced state of three-phase current when a revolving body is not revolved during generation of revolving torque.SOLUTION: A shovel according to an embodiment of the invention includes an undercarriage 1, a revolving super structure 3 mounted on the undercarriage 1 in a revolvable manner, a revolving electric motor 21 for revolving and driving the revolving super structure 3 with the usage of three-phase AC, a revolving speed reducer 24 for reducing rotation of the revolving electric motor 21, an operation state detecting device 51 for detecting an operation state of the revolving electric motor 21, and a controller 30 for controlling the revolving electric motor 21. The controller 30 generates a command different from a command based on revolving operation, and rotates the revolving electric motor 21 at a predetermined angle.SELECTED DRAWING: Figure 4
Inventors:
Taizo Yamamoto
Osamu Nakazaki
Osamu Nakazaki
Application Number:
JP2015053979A
Publication Date:
March 25, 2020
Filing Date:
March 17, 2015
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
E02F9/20; B60L50/16; E02F9/24; E02F9/26
Domestic Patent References:
| JP2013085426A | ||||
| JP2005247078A | ||||
| JP2012080667A | ||||
| JP2010150898A |
Foreign References:
| WO2008041395A1 | ||||
| WO2015030140A1 | ||||
| US8704466 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito