Design and Implementation of a AC load control with temperature and faulty product detection

International Journal of Smart Home
Vol. 7, No. 4, July, 2013

Design of a Microcontroller based Fan Motor Controller for Smart
Home Environment
Chee-Hoe Pang, Jer-Vui Lee, Yea-Dat Chuah, Yong-Chai Tan and N. Debnach
Faculty of Engineering and Science, Universiti Tunku Abdul Rahman,
Kuala Lumpur, Malaysia. [e-mail] Abstract
Single phase induction motors are the most widely used motors for home appliances. The AC induction motor has a simple rugged design. Other advantages include low cost, low maintenance and can be connected directly to an AC power source. When power is supplied to an induction motor at the recommended specifications, it runs at its rated speed [1]. However, many applications need variable speed operation. One of them is a fan. This paper presents a design of a microcontroller based motor controller with heat sensor which is used to vary the speed of a motor in a smart home. The discussion includes the design of a controller that varies the speeds of the motor with respect to the ambient temperature in a smart home environment.
The controller is embedded as an addition to a stand fan. A phase control method is selected to be implemented in this design. The power delivery to the motor is controlled by the firing angle of a Triac where it controls the AC power supply. With the firing time controlled by the Triac, the input power to the motor can be controlled accordingly. In addition, a hand-clap circuit is also introduced which acts as a switch to activate or deactivate the motor.
Keywords: Single phase induction motor, phase control, triac, microcontroller

1. Introduction
A single phase induction motor is the most common AC motor. In all single phase induction motor, the rotor is made of a squirrel cage type [2]. Permanent split capacitor (PSC) typed motor is one that is categorized under the single phase induction motors. It consists of three main parts which are the main winding in the stator, rotor and

References: Technology Inc., (2002). R. Parekh, “AC Induction Motor Fundamentals”, Microchip Technology Inc., (2003). I. Boldea and S. A. Nasar, “The Induction Machine Handbook (Electric Power Engineering Series)”, CRC Press, (2001). Conference, (PESC '05), (2005), pp. 1339-1345. D.V. Nicolae and A. A. Jimoh, “A Three-Phase Induction Motor with Power ElectronicControlled Single-Phase Auxiliary Stator Winding”, IEEE Power Electronics Specialists Conferences (PESC 2007), (2007), pp A. M. Bazzi and P. T. Krein, “Input power minimization of an induction motoroperating from an electronic drive under ripple correlation control”, IEEE Power Electronics Specialists Conference (PESC 2008), (2008), pp. 4675-4681. Volts/HertzControl”, IEEE Transactions on Industry Applications, vol. IA-21, no. 1, (1985), pp. 241-247. and Applications, vol. 5, (1993), pp. 455-458. F. Zidani, M. S. Nait Said, D. Diallo and M. E. H. Benbouzid, “Fuzzy optimal volts/Hertz control method for aninduction motor”, IEEE International Conference on Electric Machines and Drives (IEMDC 2001), (2001), P. Hothongkham and V. Kinnares, “Investigation into Harmonic Losses in a PWM Multilevel cascaded HBridge Inverter Fed InductionMotor”, 7th International Conference on Power Electronics and Drive Systems, 2007 (PEDS '07), (2007), pp (2009), pp. 1110-1115. J. Gholinezhad and Noroozian, “Application of cascaded H-bridge multilevel inverterin DTC-SVM based induction motor drive”, Power Electronics and Drive Systems Technology (PEDSTC), (2012), pp J. Ewanchuk and J. Salmon, “A Square-wave Controller for a high speed inductionmotor drive using a three phase floating bridgeinverter”, IEEE Energy Conversion Congress and Exposition (ECCE), (2010), pp V. F. Pires and J. F. Silva, “Hybrid cascade multilevel inverter using a single DC source for open-end winding induction motors”, IEEE International Conference on Industrial Technology (ICIT), (2012),pp H. M. El Zoghby, S. M. Sharaf and M. A. Ghazy, “Control of two-phase induction motor by changing the phase difference angle”, Eleventh International Middle East Power Systems Conference (MEPCON 2006), (2006), pp. 28, no. 1, (2013), pp. 526-536. S. Stephen Olokede, “Design of a Clap Activated Switch”, Leonardo Journal of Sciences, no. 13, (2008), pp. 4458. H. Abramowitz, “Phase-Control Alternatives for Single-Phase AC Motors Offer Smart”, Low-Cost, Solutions, Power Systems World, (2003). Vol. 7, No. 4, July, 2013 Authors