SENSORLESS BLDC MORTOR SYSTEM AND DRIVING METHOD OF SENSORLESS BLDC MORTOR

摘要

The present invention relates to a sensorless bi-DC motor system. The sensorless bi-DC motor system of the present invention includes a BI DC motor including first to third coils, a comparator for comparing a voltage of a specific coil with a neutral point voltage, a comparator for comparing the voltage of the specific coil with the neutral point voltage, A three-phase inverter for supplying a power supply voltage or a ground voltage to a specific coil or floating a specific coil in response to first and second coil control signals, And a mode selector for selecting the driving mode of the BI DC motor.