Sensorless BLDC motor and a manufacturing method thereof

摘要

Disclosed is a control system for detecting a rotor position in a sensorless brushless direct-current (BLDC) motor including a switching element for changing current flow direction between each phase and for performing a switching operation; a dividing circuit for dividing counter-electromotive force generated in an open phase when the switching element is operating; and an A/D converter for converting analogue values of the dividing circuit into digital values.