Magnetic slot wedges for Motors

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Let me give you a clear idea about armature slots … The place between two teeth is called armature slot , teeths are made by armature

Slot wedges made of magnetic material are a significant means to improve the efficiency of a motor or generator Magnetic slot wedges reduce slot ripple in of slots × No of conductorsslot P = No of generator poles A = No of parallel paths in armature N = armature rotation

slot 88 ku The Gramme-ring armature is constructed by winding an insulated wire around a soft-iron ring Eight equally spaced connections are made to the winding Each Polarity of interpoles with respect to polarity of main poles in DC motors and generators Figure 4 SHUNT FIELD ARMATURE INTERPOLE FIELD SERIES FIELD