Phase Motor Protection Circuit Analysis and Design
Abstract
According to Phase motor running all the circumstances, research designs meet the production requirements of the protection circuit. We know that three-phase asynchronous motor three-phase winding access balanced three-phase alternating current generated when rotating magnetic field. This is the basic three-phase asynchronous motor running conditions. The so-called Phase that the lack of three-phase power supply in one phase (such as three-phase line in any one off) or three-phase windings have broken any one phase. Occurred on the Syrian any case, do not have the three-phase asynchronous motor running basic conditions, collectively known as the missing running. production operation in the industrial and mining enterprises, while the induction motor due to Phase alarming number burned. Therefore, this design causes the lack of phase, phase run-time analysis of the theory, Search and evaluation as a reasonable basis for phase protection measures, in this design, we use symmetry to analyze missing running, and the sub-motor starter motor before the start of Phase and Phase two cases occurring after the analysis. In addition to the main motor control circuit fault in the signal extraction circuit, etc. are analyzed and selected. Tried to be the most economical, safe and effective, and further design for the actual production of the protection circuit.
