Brushless direct current motor system and logic control circuit and initial steering judgment method thereof

The invention discloses a brushless direct current motor system and a logic control circuit and an initial steering judgment method thereof. The brushless direct current motor system comprises a power stage, a Hall sensor and a logic control circuit, the logic control circuit comprises a comparison circuit, a phase detector and a logic unit. The logic unit selects a forward start-up logic or a reverse start-up logic according to the initial steering information to control operation of the power stage. According to the brushless direct current motor system and the logic control circuit and the initial steering judgment method thereof, the starting performance of the motor is improved, the circuit wiring is simplified, and the cost is reduced. 本申请公开了一种无刷直流电机系统及其逻辑控制电路和初始转向判断方法。所述无刷直流电机系统包括：功率级、霍尔传感器和逻辑控制电路；所述逻辑控制电路包括：比较电路、相位检测器和逻辑单元；所述逻辑单元根据初始转向信息，选择正转启动逻辑或者反转启动逻辑，以控制功率级的运行。所述无刷直流电机系统及其逻辑控制电路和初始转向判断方法提高了电机启动性能，简化了电路接线，降低了成本。