Fuzzy interfering control of universal motor for electromagnetic nonlinearity

The aims of the paper are to improve the dynamic response of a universal motor and to give a better response of external load disturbance by using fuzzy logic principles. Many plants exhibit nonlinear behavior and the use of linear analysis only, may not provide an adequate description of the behavior. In this paper, a new method to solve the nonlinear problem of universal motor, are presented. The behavior of the system is studied by simulation. Differing from existing TRIAC and DC chopper speed control schemes, the new system adds the inner current control to improve dynamic response. Mains power factor, motor speed, and current are analyzed for different load conditions. Experiments are made to verify the effectiveness of the system. The experimental results demonstrate that the developed universal motor control has great potential and practical significance for industrial and home applications, such as Smart Home system, and both simple hardware design and good speed response can be attained.