The invention provides a cable crane hoisting mechanism control circuit system with the inversion protection function. The cable crane hoisting mechanism control circuit system comprises a silicon controlled direct-current speed adjusting device and a supply voltage detecting device. The silicon controlled direct-current speed adjusting device is connected between a power supply and a cable crane hoisting mechanism direct-current motor. The supply voltage detecting device is connected between the power supply and the silicon controlled direct-current speed adjusting device and used for detecting the voltage drop value of the power supply in real time. When it is detected that the voltage drop value of the power supply is larger than or equal to a standard drop value, a sudden stop control signal is output to the silicon controlled direct-current speed adjusting device, the silicon controlled direct-current speed adjusting device stops running when a cable crane is in a descending state, and the direct current generated by a direct-current motor of a running hoisting mechanism is inverted into alternating current so as to be fed back to the power supply. According to the cable crane hoisting mechanism control circuit system, the supply voltage detecting device is introduced to monitor the power grid voltage in real time, inversion failures and short circuit current production of the direct-current speed adjusting device are prevented, and thyristors, the direct-current motor and other electric equipment are protected.
Cable crane hoisting mechanism control circuit system with inversion protection function
11.11.2015
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
Hoisting hook mechanism with automatic shielding protection function and crane
Europäisches Patentamt | 2021
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