| 摘要 |
A revolving drive control device comprises a revolution operating lever (19a), a revolving hydraulic motor (31), a main hydraulic pump (32), a first electric motor (34), a main control valve (36), hydraulic fluid pressure detection sensors (40a, 40b), a revolving electric motor (51), a controller (52), a first inverter (53), a second inverter (54), a first battery (55), and a second battery (56). The controller (52) controls the revolving of a revolving platform by performing a control so as to drive the revolving hydraulic motor (31) and the revolving electric motor (51) when hydraulic fluid pressure resulting from the operation of the revolution operating lever (19a) is equal to or greater than a predetermined pressure, and performing a control so as to drive only the revolving electric motor (51) when the hydraulic fluid pressure resulting from the operation of the revolution operating lever (19a) is less than the predetermined pressure. |
