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AssigneeHitachi Construction Machinery Co., Ltd.
InventorsSatoru Kaneko, Takashi Ikimi, Shiho Izumi, Hidekazu Moriki, Nobuo Masano
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[Object] To enable stable cargo handling operation and high-efficiency recovery of regenerative electric power by means of simple configuration. [Solution] In a forklift which includes linear actuators that convert rotational motion into linear motion, the linear actuators being provided in a plurality of fork parts of a cargo handling drive device, the forklift includes induction motors that drive each of the plurality of actuators provided in the plurality of fork parts, an inverter that drives the induction motors in the same manner, and a controller that controls the inverter, and the controller computes a slip frequency by using the lowest detection value among detection values from detectors that detect each of rotation speeds of the plurality of induction motors.
A forklift which includes linear actuators that convert rotational motion into linear motion, the linear actuators being provided in a plurality of fork parts of a cargo handling drive device, comprising:
A forklift which includes linear actuators that convert rotational motion into linear motion, the linear actuators being provided in a plurality of fork parts of a cargo handling drive device, comprising:
A forklift which includes linear actuators that convert rotational motion into linear motion, the linear actuators being provided in a plurality of fork parts of a cargo handling drive device, comprising:
Dependencies are inferred from the claim text.