Abstract
Mathematical model simulating the operation of DC electric drive hoisting mechanism has been developed. The study illustrates the capabilities of the developed model for investigation both normal and abnormal modes of operation of the converter and the supplying voltage. Large attention was given to the thyristor converter and its firing system so that fast-proceed micro-processes occurring in the converter can be simulated with a high degree of accuracy.
Highlights
AC electric drives with frequency converters are used widely in practice more than DC drives, some well-known leading crane building companies still use DC electric drives in their constructions
It is known that hoisting drives should be capable of power regeneration in some essential modes like lowering cargoes and speed reduction at lifting
It is necessary to design a power electronic circuit so that the power regeneration could be achieved. From this point of view, the dual converter used in DC electric drives appears to be more simple and cheaper than the converter used in AC drives which in addition to the converter used in DC drive comprises a DC link and an inverter
Summary
AC electric drives with frequency converters are used widely in practice more than DC drives, some well-known leading crane building companies still use DC electric drives in their constructions. It is known that hoisting drives should be capable of power regeneration in some essential modes like lowering cargoes and speed reduction at lifting. It is necessary to design a power electronic circuit (converter) so that the power regeneration could be achieved. From this point of view, the dual converter used in DC electric drives appears to be more simple and cheaper than the converter used in AC drives which in addition to the converter used in DC drive comprises a DC link (filter) and an inverter
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