| SUMITOMO (S.H.I.) CONSTRUCTION MACHINERY CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120130576 | WORKING MACHINE - Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. | 05-24-2012 |
| 20120109472 | HYBRID WORKING MACHINE AND CONTROLLING METHOD THEREOF - In a hybrid working machine, a control unit ( | 05-03-2012 |
| 20110093150 | WORKING MACHINE - A working machine includes: a first electric motor used for work; a second electric motor used for applications other than work; a first inverter circuit connected to the first electric motor; a second inverter circuit connected to the second electric motor; a battery connected to the first and second inverter circuits; and a control unit that drives the first and second inverter circuits. The control unit has a discharge mode to discharge electric power stored in the battery, and discharges the battery by stopping the first inverter circuit while driving the second inverter circuit in order to make the second electric motor perform electric operation in the discharge mode. Accordingly, since the state of charge is reduced, the life of a capacitor can be increased. | 04-21-2011 |
| 20110077825 | TURNING DRIVE CONTROL UNIT AND CONSTRUCTION MACHINE INCLUDING SAME - A turning drive control unit configured to control driving of the rotation mechanism of a construction machine driven to turn by an electric motor includes a drive command output part configured to output a speed command driving the electric motor based on the amount of operation input via the operation part of the construction machine; a rotation speed detection part configured to detect the rotation speed of the electric motor; and a drive command generation part configured to generate a drive command driving the electric motor based on the speed command output from the speed command output part and the rotation speed detected by the rotation speed detection part. At a time immediately before a rotation stop of the electric motor, the drive command generation part causes the braking torque of the electric motor to be smaller than before the time immediately before the rotation stop. | 03-31-2011 |
| 20100280697 | HYBRID-TYPE CONSTRUCTION MACHINE - In the hybrid-type construction machine, the control unit ( | 11-04-2010 |
| 20100222970 | TURNING DRIVE CONTROL APPARATUS AND CONSTRUCTION MACHINE INCLUDING THE SAME - A turning drive control apparatus that controls a drive of a turning mechanism of a construction machine driven to turn by an electric motor, includes: a drive command creation part that creates a drive command to drive the electric motor based on an amount of operation input through an operation part of the construction machine; a turning motion detection part that detects a turning motion of the turning mechanism; and a drive command correction part that corrects the drive command, when a turning motion in a direction opposite to a turning operation direction input to the operation part is detected by the turning motion detection part, to suppress the turning motion in the direction opposite to the turning operation direction in response to a degree of the turning motion in the direction opposite to the turning operation direction. | 09-02-2010 |
