Optimization of 1 phase induction motor speed in the process of filtering soybean pulp using PI control method

Abstract

Tofu is one of Indonesia’s special foods made from fermented soybean juice. There are several processes in making tofu. One of them is the process of filtering the juice with soybean waste. The filtering process will determine the quality and quantity of tofu. The better filtering process, the more juice are produced. The purpose of this study is to improve the results of the soybean pulp filtering process. One way is to use an induction motor for a spinner filter machine with adjustable speed. To set the speed is using VSD as a motor driver. VSD output is a frequency that can be used to regulate the speed of the induction motor. Determination of motor speed is using the PI Ziegler-Nichols oscillation tuning method so that a stable motor rotation speed is obtained. Kp value = 0.108, and Ti = 0.83 with load test conditions and 700rpm set point has the characteristics of the system response% error steady state = 7.5%, rise time = 4 sec, settling time = 4.5 sec and% over shoot = 0%.