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What is PMMC Ammeter Working Principle Explained about?

This document provides an overview of how a PMMC (permanent magnet moving coil) instrument works as an ammeter. It consists of: 1) A U-shaped permanent magnet that forms the north and south poles. 2) A soft iron cylindrical core placed within the poles. 3) A copper coil wound on a rectangular aluminum frame and placed around the core. 4) Springs connected to the coil and frame to oppose coil motion. When current passes through the coil in the magnetic field, it experiences electromagnetic forces that try

Author

Lokesh Naidu Tummala

Language

EN