Variable-frequency-speed-adjusting control system and method of tower-crane lifting mechanism
A lifting mechanism, frequency conversion speed regulation technology, applied in cranes, load hanging components, transportation and packaging, etc. problems, to achieve the effect of easy process automation control, obvious power saving effect, and improved usage
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[0030] A frequency conversion speed regulation control system for tower crane lifting mechanism, such as figure 1 Shown, including: linkage table 1, limit signal acquisition device 2, PLC controller 3, frequency converter 4, speed measuring encoder 5, lifting motor 6, reducer 7, drum 8, etc.; among them:
[0031] The limit signal acquisition device 2 and the inverter 4 are respectively connected to the PLC controller 3. The linkage table 1, the inverter 4, the lifting motor 6, and the speed measuring encoder 5 constitute a closed control loop; the lifting motor 6, the reducer 7, and the drum 8 For the lifting mechanism.
[0032] The limit signal acquisition device 2 is a device used to collect the travel of the tower crane mechanism and the travel limit switch signal of the limit limit protection during the operation of the tower crane equipment; its composition includes: a gear train with a coupling , Cam group, travel switch; feedback the running travel of the controlled object ...
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