摘  要：作者在对新一代直流电动机（New DCM）的研究中发现并提出了直流旋转磁场这一电机学的新概念，是用换向控制器来控制电子换向器中功率开关管的导通状态及变化顺序，让通电直流电枢绕组磁势沿电枢表面圆周旋转而达到的。与交流旋转磁场一样，都是电枢绕组电路产生的磁势，它的旋转是由于电枢绕组线圈内电流瞬时值沿圆周分布变化引起的，与定转子机械相对运动没有关系。从转子的角度看电枢的旋转磁势是直流绕组电流还是交流绕组电流产生的并没有什么区别，所以对应不同的转子结构也能构成类似于交流同步电动机和交流异步电动机基本作用原理的电动机，又有所区别，出现了直流同步电动机和直流异步电动机的新概念和新名称。该文的研究有助于加深认识和开阔思路。
关键词：直流电动机；同步电动机；异步电动机；旋转磁场

Abstract: The author found and put forward the new electromechanical concept of the DC rotating magnetic field in the New DCM research work. The DC rotating magnetic field is produced by the DC armature winding magnetic potential when commutation controller controls the conducting state and order of power switches in the electronic commutator. The change of the instantaneous current in the AC armature winding along the circumference produces an AC rotating magnetic field. Both DC and AC magnetic potential are produced by the armature winding circuit and are no relationship with the rotor mechanical relative motion. From the rotor?perspective there is no difference between the armature winding magnetic potential produced by the DC winding current and the AC winding current. So the DC rotating magnetic field combined with different rotor structure can constitute the new concepts of the DC synchronous motor and the DC asynchronous motor, which are similar with the concepts of the AC synchronous motor and the AC asynchronous motor. This study will help to deepen our understanding and open mentality
Key words: DC motor; synchronous motor; asynchronous motor; rotating magnetic field