This paper, first, introduces the evaluated results of the loss, iron and copper loss, in a conventional IM and three IMs made with soft magnetic composite, SMC, core: all SMC machine in which both the stator and the rotor are made of SMC, and stator SMC machine in which only the stator is made of SMC. In each machine, the loss characteristics for driven frequency were calculated from FEA, and then the characteristics at a rated operation were measured in the test machines. The calculated and the measured results almost agreed at the rating. And SMC has favorable characteristic of iron loss in high frequency. Thus the loss characteristics with driven frequency that were calculated by FEA are shown in four machines. In addition, the characteristics of machine that were used lasted SMC are described in this paper.