METHOD FOR STARTING A BRUSHLESS SENSORLESS DC MOTOR

摘要

PURPOSE: A method for starting a brushless sensorless dc motor is provided to drive a DC motor by using a BEMF(Back Electromotive Force) by successively performing an arranging step, a driving step, and an operation mode. CONSTITUTION: A parameter value is set as a first period. A time value is set to a third time(110). A first total current from a first node to a second node is generated(112). A second current flowing from to the first node and the second node is generated. A first counter electro-motive force value is stored after the first delay(118). First sampled-data is generated by sampling timer during a second time. The parameter value is controlled by the first sampled-data(120).