Construction machine and method of controlling turning electric motor
AssigneeSumitomo Heavy Industries, Ltd.
InventorMakoto YANAGISAWA
Life of this patent
Estimating the term…
Abstract
A construction machine includes a turning electric motor configured to drive a turning mechanism configured to cause an upper-part turning body to turn relative to a lower-part traveling body and a control unit configured to control driving of the turning electric motor. The control unit is configured to cause the output of the turning electric motor to continue after the turning speed of the upper-part turning body becomes zero, based on the magnitude of the output or the direction of the output of the turning electric motor at the time when the upper-part turning body is decelerated and its turning speed becomes zero.
Claims14
A construction machine, comprising:
- a turning electric motor configured to drive a turning mechanism configured to cause an upper-part turning body to turn relative to a lower-part traveling body;
- and
- a control unit configured to control driving of the turning electric motor,
- wherein the control unit is configured to cause an output of the turning electric motor to continue after a turning speed of the upper-part turning body becomes zero, based on a magnitude of the output or a direction of the output of the turning electric motor at a time when the upper-part turning body is decelerated and the turning speed thereof becomes zero.
A method of controlling a turning electric motor configured to drive a turning mechanism configured to turn an upper-part turning body relative to a lower-part traveling body, comprising:
- causing the upper-part turning body to turn relative to the lower-part traveling body by driving the turning electric motor to rotate in a first direction;
- decelerating the upper-part turning body by driving the turning electric motor to rotate in a second direction reverse to the first direction;
- and
- causing an output of the turning electric motor to continue after a turning speed of the upper-part turning body becomes zero, based on a magnitude of the output or a direction of the output of the turning electric motor at a time when the upper-part turning body is decelerated and the turning speed thereof becomes zero.
Dependencies are inferred from the claim text.