摘要：在简述了New DCM的电枢绕组结构和工作原理的基础上，提出了通过换向单元电压过零检测法确定转子位置的思想，通过理论分析、仿真和实验等手段验证了这一思想的正确性，并设计了换向单元电压过零检测电路和控制软件，实现了9换向单元New DCM的无位置传感器控制，实验测得的电机特性（包括机械特性和电流波形）与有HALL传感器控制时完全相同。
关键词：New DCM；新直流电动机；无位置传感器控制；换向单元电压；过零检测

Abstract: The armature winding structure and the operational principle of New DCM were introduced. The commutationunit voltage zerocrossing detection principle was proposed and analyzed theoretically and experimentally. And the commutationunit voltage zerocrossing detection circuit and sensorless control software were designed. Finally, sensorless control of New DCM was successfully carried out. The experimental results, including mechanical property and commutationunit current waveform, verify the feasibility and validity of the proposed method.
Key words: New DCM; sensorless control; commutationunit voltage; zerocrossing detection