CAJ | 학술논문

无位置传感器无刷直流电机通常采用端电压法检测反电势过零点来检测转子位置，但当电机静止或转速很低时，由于反电势与转速成正比，因此无法检测到反电势的值。针对这一问题，提出了一种基于三段式起动的120°触发器和瞬时切换的他控式起动方法。在 Mat-lab / Simulink 环境下建立无刷直流电机的仿真模型，通过其中的120°触发器模块、切换模块以及时钟信号来完成无刷直流电机的顺利起动。实验结果证明了该起动方法的有效性。
무위치전감기무쇄직류전궤통상채용단전압법검측반전세과영점래검측전자위치，단당전궤정지혹전속흔저시，유우반전세여전속성정비，인차무법검측도반전세적치。침대저일문제，제출료일충기우삼단식기동적120°촉발기화순시절환적타공식기동방법。재 Mat-lab / Simulink 배경하건립무쇄직류전궤적방진모형，통과기중적120°촉발기모괴、절환모괴이급시종신호래완성무쇄직류전궤적순리기동。실험결과증명료해기동방법적유효성。
The sensorless brushless dc motor usually uses the method of terminal voltage detecting back emf’s zero-crossing point to detect the rotor position,but when motor is static or the rotor speed is very low,it is difficult to detect the back emf’s value because of it is proportional to the speed. In order to solve this problem,a new start-up method based on three-step starting was designed by con-trolling 120° trigger and instantaneous switch. In MATLAB / SIMULINK,brushless dc motor simula-tion model was established by the 120° trigger module,switch module and the clock signal to com-plete the smooth starting. The experimental results illustrate the effectiveness of the proposed starting method.