EFFECT OF POWER SUPPLY VOLTAGE UNSINUSOIDALITY ON RELIABILITY OF A LINEAR INDUCTION MOTOR
There is an assessment of the way power supply voltage unsinusoidality influences on the life time of a flat linear induction motor in the drive of an attrition mill. To achieve this goal, the thermal scheme for replacing this engine was chosen, a mathematical model of thermal processes in the engine as well as a software for the object-oriented modeling environment Matlab (Simulink) were developed. Using the computer program, the temperature rise of the inductor winding in a linear asynchronous motor is determined. It is due to current flow created by higher voltage harmonics forming positive and reverse sequence of phase alternations. On the basis of the Montzinger equation, dependency diagrams of the relative life time of a linear induction motor on coefficients of the harmonic voltage components are determined.