armature reaction

Permanent magnet direct current (PMDC) motors nowadays successfully replace analogical motors with electromagnetic excitation. PMDC have a higher output-input ratio and less mass on unit of power. In the process of planning and exploitation of PMDC motors it is necessary to prevent the danger of demagnetization effect of permanent magnets. The demagnetizing action of armature reaction can result in demagnetization effect of permanent magnets and to the loss of capacity to the PMDC. These factor ground research actuality.