Lifting solutions company Konecranes says its new CXT Adaptive Speed Range (ASR) and CXT Extended Speed Range (ESR) hoisting converters have been developed to improve stepless and adjustable controls of light industrial cranes to improve lifting and lowering as well as trolley and crane travelling.The company says that the ASR technology provides stepless control of the hoisting speed in the ration 10:1, owing to the optimised model sizes of the components. Further, the ASR technology does not require elaborate electrical equipping of the crane, offering operating ease. The ESR technology offers rapid hoisting speeds using more powerful engines and providing an extended speed range of up to 37:1. When operating with the maximum load, the hoisting speed with ESR is automatically two thirds of the maximum hoisting speed. However, hoisting speed with empty hook is 50% faster than with traditional frequency converters.
Meanwhile, both models have varied uses owing to their operations. The hoisting speed with empty hooks can be up to 505 quicker than the corresponding two-speed hoist engines, which simultaneously saves time and productivity.Further, the smooth speed acceleration provided by the converter minimises strains on crane bridges, crane runways and building, while preventing current peaks at the same time. Konecranes says this ensures a longer lifetime, lowers energy consumption and lessens maintenance costs throughout the service life, benefitting the crane driver to freely concentrate on safe operating.