Dobrodeyev P. Increasing the efficacy of methods to the mitigation of external magnetic field in DC machines

3. The subject of inquiry is external magnetic field in DC machines. The purpose is increasing the efficacy of methods to the mitigation of external magnetic fields in DC machines. Methods are spatial harmonic analysis, method of magnetic moments. Theoretical and practical results are development of recommendations for designing and production of machines with a low level of their external magnetic field, high-performance means of its reduction. The novelty: methods of decreasing of an exterior magnetic field in DC machines have received the further development, the new effective means allowing to ensure decreasing of a level of a magnetic field in 4-10 times are developed. The outcomes of work were used at designing and manufacture of DC machines with a low level of their external magnetic field diagnostics the quality of rotors, demagnetization of arterial pipelines. Branch of industry – electric machine industry