Abstract: The system proposed in this paper aims at monitoring the torque and efficiency in simple dc motors in real time by employing steel disc. An embedded system is employed for acquiring electrical signals from the motor in a noninvasive manner, and then performing local processing for torque and efficiency estimation. The values calculated by the embedded system are transmitted to a LCD. Motors can be monitored in real time. An experimental study was conducted for observing the electronic charkha with its conditioning parameters. This study demonstrated that the use of intelligent nodes, with local processing capability, is essential for this type of application. The embedded system was deployed on a charkha with disc arrangement and studies were conducted to analyze torque and system efficiency.

Keywords: Efficiency estimation, embedded systems, PMDC motors, torque measurement, steel disc.