A SMART SYSTEM OF AC MOTOR SPEED CONTROL BASED ON ROOM TEMPERATURE

Shishir Chandra, P. Vivek, A. Kumar

Abstract: In the engineering world, every day, new and different applications for an AC motor are developed, clarifying the need and dependency on such machines in our society. Also at the same time, due to their increasing necessity, better energy efficient operating methods have to be developed for such motors. While coming to their operation, it can be clearly identified that the control of their speed during real time operations is a major characteristic of their energy usage. Hence, the speed at which the motor runs at a given load determines the energy efficiency and in turn overall efficiency. Evidently, certain methods have to be devised to regulate the speed of the motor (AC) for better energy utilization. This paper talks of one such method which is used to regulate speed of the motor using the principle of varying the input voltage to the motor based on ambient temperature. Of the many parameters that influence motor performance, Temperature of the ambient is the most important deciding factor. Also, in domestic applications or in Electronic Equipment, Cooling fans are a major requirement. These Fans operate based on the temperature of its surroundings. Hence, in such cooling systems efficiency of energy can be improved by designing a control that provides a temperature dependant operation. In this paper, temperature control of an AC motor is obtained by controlling a HBridge inverter through a microcontroller device, which produces appropriate pulse signals corresponding to the temperature of the surroundings. The control signal fed-inverter gives out temperature equivalent AC voltage output which is fed to the AC motor, therefore, achieving a smart energy efficient control for Modern motors.

Keywords: SPWM (Sinusoidal Pulse Width Modulation), SPIM( single phase induction motor), MOSFET(Metal Oxide Semi-conductor Field Effect Transistor),H-bridge, Arduino

DOI: https://doi.org/10.15623/ijret.2016.0509034