Infrared (IR) wireless transmission technology has proven to be reliable in electric motor control. The existing control schemes for electric motors require the operator to be at the location of the motors or resort to the use of wired controls. Wired motor controls can fail due to objects falling on them and accidental disconnections. Also, voltage drops in the control wires are wasted in generating heat and increase the cost of electricity tariffs. Further, there is increase in labour cost and installation of wired motor control. Additionally, there are slips, trips and fall hazards associated with control trailing wires. In this research, a wireless control system for a three-phase, 415 V, 50 Hz, squirrel-cage induction motor is designed, simulated and implemented. The issues of voltage drop in control wires is minimised because of the reduced wires involved with this control scheme, thereby improving on the motor efficiency. The transmitter transmits IR signal to the receiver. There is a phototransistor in the receiver that receives the IR signal, amplifies it and decodes it with the help of a microcontroller. The output from the microcontroller is used to regulate auto-transformers to control the three-phase voltage to the motor. The designed system can wirelessly start, stop and change the speeds of induction motor for three successive speed levels. The receiver senses signal from the transmitter within a distance of 9 m. The system is designed to switch the motor into standby mode and then proceed to speeds one, two, three and then finally stop the motor. The developed infrared-based wireless transceiver can be adopted to control a three-phase, 415 V, 50 Hz, squirrel-cage induction motor at remote and inaccessible areas such as water treatment and three-phase separation plants.
Daniel Kumi Owusu,
Christian Kwaku Amuzuvi,
Design and Construction of a 3-Phase Induction Motor Wireless Control System, Journal of Electrical and Electronic Engineering.
Vol. 8, No. 3,
2020, pp. 92-102.
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