In this paper,a software method and an algorithm are put forward for the sensorless trapezoidal brushless DC motor.The experimental results show that the advanced method is correct and feasible.

• 针对具有梯形反电动势波形的直流无刷电机无位置传感器的控制，文章提出了一种软件实现的方法，给出了算法，并通过实验验证了这种方法的正确性和可行性。