The lifting mechanism, trolley traveling mechanism, trolley traveling mechanism, dam crest discharge mechanism of the One-way dam crest gantry crane, the motors of the negative lifting mechanism, the rotary lifting mechanism, and the rotating mechanism all adopt the frequency converter to realize the start and stop frequency conversion of the motor, so as to achieve Continuous and smooth linkage control output.
The frequency range of the inverter of the One-way dam crest gantry crane is 5 ~ 50Hz, the speed regulation range is 1:10, and the corresponding relationship is:
The working frequency of the inverter is 5Hz in the first gear, the working frequency of the inverter is 50Hz in the fourth gear, and the operating frequency of the third gear is set by the operator. The frequency converter has the functions of short circuit protection, over current protection, voltage loss protection, phase loss protection, and overload protection. The data exchange between PLC and each frequency converter is realized through bus communication.