PROBLEM TO BE SOLVED: To accurately detect the load value of a lifting load by using only output information of a motor without separately providing a dedicated load detector in a crane provided with a winch drum to be driven by the motor.SOLUTION: An output torque estimation part 151 acquires a current value to be inputted to a motor 13 from a power converter 14, and calculates an output torque estimation value being an estimation value of output torque of the motor 13 from the acquired current value. A load estimation part 152 estimates the load value of a lifting load 17 on the basis of the output torque estimation value calculated by the output torque estimation part 151, the reduction ratio of a speed reducer 12, the effective radius of a winch drum, and a tying number set by a tying setting part 153.SELECTED DRAWING: Figure 1

    【課題】電動機により駆動されるウインチドラムを設けたクレーンにおいて、別途専用の荷重検出器を設けずに、電動機の出力情報のみを用いて、吊荷の荷重値を正確に検出する。【解決手段】出力トルク推定部151は、電動機13に入力される電流値を電力変換器14から取得し、取得した電流値から電動機13の出力トルクの推定値である出力トルク推定値を算出する。荷重推定部152は、出力トルク推定部151により算出された出力トルク推定値と、減速機12の減速比と、ウインチドラムの有効半径と、本数設定部153により設定された掛け本数とに基づいて、吊荷17の荷重値を推定する。【選択図】図1


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    Title :

    LOAD DETECTION DEVICE AND HOISTING DEVICE OF CRANE PROVIDED WITH THE SAME


    Additional title:

    荷重検出装置及びそれを備えるクレーンの巻上装置


    Contributors:

    Publication date :

    2018-01-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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