Modeling and Simulation of Bldc Motor for Aiding and Opposing Loads

BLDC (Brushless DC) motors have found a wide range of applications in industrial automation, automotive, aerospace, instrumentation because of their long operating life, compact form, reliability and low maintenance, high efficiency and better speed torque characteristics. This Paper is an endeavor towards developing a simulink model with the parameters of a real trapezoidal back-emf type of BLDC motor. The model is then analyzed under aiding and opposing loads.. The variations in motor speed-torque characteristics, back emf and current drawn by the motor for both no-load and loaded (aiding and opposing loads) conditions is analyzed. Some experimental tests are conducted to analyze the model and compared with the simulation results which are very useful in studying the performance of motor system.