TRIAC-DIAC based DC series motor speed controller for mud pumps of drill-rig equipment

摘要

The present investigations relate to the development of TRIAC-DIAC based DC series motor speed controller for mud pumps of industrial drill-rig equipment. This paper deals with mud pumps on drilling rigs provide the means for supplying flow and pressure of the chemical mud fluid through the drill pipe, drill bit and return to the surface via the annulus of drill pipe. In this process, the mud maintains down-hole pressure, cools the drill bit and removes the cuttings from the well bore. Since flow is proportional to motor speed and pressure is proportional to motor current, flow and pressure signals can be obtained from the speed calculator card and from the field current of the DC series motor. The speed control of a dc series motor using a TRIAC together with a bridge rectifier is developed. The TRIACs of today are well suited to the requirements of switching inductive loads. TRIAC control circuits must be particularly well tuned to be both economical and applicable to inductive loads.