摘要：新直流电动机（New DCM）与传统有刷直流电动机（DCM）有相同的电枢绕组，都是分成K个换向单元成封闭形（多边形）接法，与多相交流电动机采取封闭形（多边形）接法的电枢绕组有类似之处但有区别，New DCM不是一台多相交流电动机，也不是一台多相无刷直流电动机。与典型多边形接法的多相交流电枢绕组闭合回路可能有环流的情况不同，New DCM或DCM为封闭形接法的电枢绕组，闭合回路内不存在环流，不可能产生环流。
关键词：直流电动机；新直流电动机；无刷直流电动机；直流电枢绕组；多相交流电枢绕组

Abstract:  The new DC motor (New DCM) shares the same armature winding with traditional DC  motor (DCM), all adopt seal connection (namely polygon connection) to combine K commutating units. the armature winding of New DCM is similar but are different with multiphase AC motors armature winding which employ typical polygon connection. New DCM is neither multiphase AC motor nor multiphase BLDCM. Multiphase AC armature winding adopted typical polygon connection can have circular current in closed circuit. However, New DCM or DCM with seal connection armature winding will not and can not have circular current in closed circuit.
Key words:  DCM, New DCM, BLDCM, DC armature winding, multiphase AC armature winding