Nemykina O. Improving the efficiency of supply cranes with frequency-regulated drive

The work is devoted to improve the efficiency of power cranes with frequency-regulated drive by improved methods of analysis of the existing systems of power and the development of recommendations for cranes power system with frequency -regulated drive engineering. The method of choice power supply of cranes in based on comparative assessment power supply of DC and AC cranes with two-links frequency converters in frequency-regulated drive are developed. Analytical ratio of parameters of comparative assessment of the criteria such as calculated transformer power, cross-section and limit the length of the current lead by voltage loss and power losses in the current lead of the power supply of cranes is obtained. The advantage of the DC cranes power supply with frequency-regulated drive in analysis on all criteria are showed. Active rectifiers with dual conductivity are suggested for recuperation energy. New features of electromagnetic processes in power supply AC and DC cranes with frequency- regulated drive with help simulation are investigated. Proposal of improving the electromagnetic compatibility and power quality indicators for power supply AC and DC cranes with frequency-regulated drive are developed.