D.C. MACHINE OF TYPE HAVING PERMANENT MAGNETS WITH AUXILIARY POLES

Year	Description
1990	Invention patented by Toshio Tomite on June 31th, 1990. Abstract: A direct current machine is characterized in that each of field poles and an armature are formed to satisfy a condition that an internal peripheral width Wa of each auxiliary pole is equal to or greater than a distal end width Wt of each tooth and equal to or less than twice a distal end width Ws of each slot plus the distal end width of each tooth (Wt.ltoreq.Wa.ltoreq.2Ws+Wt). The D.C. machine also is characterized in that each of the field poles and the armature are formed to satisfy a condition that an inner peripheral width Wm of the permanent magnet is equal to or greater than twice a slot pitch Wp of the armature core and equal to or less than twice the slot pitch Wp plus the distal end width Wt of each tooth (2Wp.ltoreq.Wm.ltoreq.2Wp+Wt).
Source: selected by the editor from original sources.

Invention: D.C. MACHINE OF TYPE HAVING PERMANENT MAGNETS WITH AUXILIARY POLES