Indian Journal of Science and Technology

Abstract

In this paper aims at monitoring parameter of induction motor like current, voltage, torque and efficiency in real time by employing embedded system with wireless sensor networks. 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 monitoring unit through an IEEE 802.15.4-based Wireless Sensor Network (WSN). At the base unit, various motors can be monitored in real time. The Air Gap Torque (AGT) method is used to find out the torque and efficiency in induction motor. It is used to measure efficiency in a much less invasive manner. The AGT method can be employed without interrupting the motor operation and it is not based on the motor nameplate. This method generally is more accurate than the other methods. The proposed model has a supervisor (PC) which Communicates with the remote terminal unit, processing the variable parameters and controlling the systems. The Receiver Terminal Unit (RTU) is a local controller in distributed processes environmental which acquires the data from sensors, process the collected data puts the required data together, forming the frame for transmitting to the Supervisory Controls (S.C). RTU also receives and processes Control commands from S.C. and executes them accordingly. The communication utilizes a full duplex communication for data transmission between S.C. and RTU. The communication through wireless by using Zigbee.

Keywords: Wireless Sensor Network, AirGap Torque, Receiverterminal Unit