Performance Evaluation of Speed Controller Using Fuzzy Mamdani in Single Phase Induction Motor

In the process of making bean sprouts from green beans, require a continuous watering process. This watering process is based on the temperature of the green bean plant. The watering process begins when the temperature of the green bean plants reaches 35 °C and is stopped when the temperature is at 30 °C. Because at that temperature, green beans can grow optimally. When the temperature exceeds 35 °C, it will cause the green beans easily decay faster while when the temperature is less than 30 °C then the growth of green bean into bean sprouts will slow down. Unfortunately, this watering process is still done manually by the farmers everyday and cause the temperature of the green bean plant to be inaccurate at 35 °C to 30 °C. Therefore, it is needed a tool that can watering the green beans automatically to keep the temperature accurate at a maximum temperature of 35 °C and a minimum of 30 °C. So, in this research will propose a single phase full bridge inverter using SPWM switching method to control the speed of a single phase induction motor pump for watering process of green bean plants. In addition, Fuzzy Logic Controller (FLC) will be proposed as a control to classify the output frequency of the inverter based on the input temperature of the plant. With the FLC then the water volume for watering process can be arranged to maintain the temperature always accurate at 35 °C to 30 °C. Based on the experimental results, the FLC has a good ability to classify input temperatures of green bean plants from 35 °C to 30 °C to a frequency output of 50 Hz to 0 Hz to control the volume of watering process.