Response of a Permanent Magnet Moving Coil Instrument via the Application of Rohit Transform

In this paper, a new integral transform called Rohit transform is presented for the analysis of a Permanent Magnet Moving Coil (PMMC) instrument. A permanent magnet moving coil instrument is an electromagnetic device that is used to measure small values of electric currents. When some current is passed through the permanent-magnet moving-coil (PMMC) instrument, its coil may suffer a few back and forth oscillations about its final mean position before coming to rest. The PMMC instrument is also known as moving coil galvanometer and its mathematical analysis is usually done by an ordinary calculus approach. This paper presents the use of Rohit transform for mathematical analysis of a PMMC instrument and hence, for obtaining its response. The response obtained provides the deflection of the coil of the PMMC instrument from its mean position. In this paper, the response of a PMMC instrument is provided as a demonstration of the application of the new integral transform called Rohit transform.