摘  要：在简要介绍了九换向单元新直流电动机（New DCM）工作原理的基础上，建立了九换向单元New DCM的数学模型和基于simulink的仿真模型，对电机的机械特性和换向单元电流进行了仿真分析，实验结果验证了仿真模型的正确性。通过对换向单元电流波形的分析，指出了电子换向器的结构对New DCM换向过程的影响，为深入研究New DCM提供了基础。
关键词：换向单元;电子换向;新直流电动机;simulink

Abstract: This paper briefly introduced the system structure and working principle of 9 commutation-unit New DCM. The mathematical model and the simulation model based on Simulink of the New DCM were established，the mechanical properties and commutation-unit current of the motor were analyzed, and the experimental results verified the correctness of the simulation model. Through the analysis of the commutation-unit current waveform, pointed out that the electronic commutator’s structure on the influence of the New DCM commutation process. The work of this paper provides the foundation for further.
Key words: commutation-unit; electronically commutate; New DCM; Simulink