Mattingly & Malur, PC
Hybrid construction machine
A hybrid construction machine is capable of performing satisfactory operations even when trouble occurs that disables the electric motor from outputting torque. The hybrid construction has both a hydraulic motor and an electric motor driving the swing structure and a controller for switching between a hydraulic/electric hybrid swing mode (using both the hydraulic motor and the electric motor) and a hydraulic-alone swing mode (using only the hydraulic motor). The switching is executed while achieving satisfactory operability and performance in each mode. Normally, an energy saving operation is performed in the hydraulic/electric hybrid swing mode. When the electric amount of an electricity storage device has gone out of a prescribed range or an abnormality has occurred in an electric system (e.g., failure of an inverter), the swing mode is switched to the hydraulic-alone swing mode so that driving with normal braking torque is possible by the hydraulic motor alone.
HITACHI CONSTRUCTION MACHINERY CO., LTD.
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B60L B60L E02F B60L Y02T B60L B60L B60L E02F B60L Y02T B60L B60L B60L E02F E02F B60L B60L B60L Y02T B60L B60L Y02T B60L B60L E02F E02F E02F
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Kouji Hidetoshi Manabu Takatoshi Shinji Manabu Toshihiko Takenori
Ishikawa Satake Sugiura Ooki Nishikawa Edamura Ishida Hiroki