crown dc motors are applicable most wherever variable speed control drives are used. The speed control of dc motors by armature control or field control at constants torque & for constant continuous operation. due to incorporation with latest technology which ensures safe & trouble-free operations under critical conditions. the v-weld impart heavy strength to the yoke. armature laminations are of high quality electricalgradesteel. commutator: made from silver-copper-alloy. Electrolytic copper segments insulated from one another with mica. Riser connections are the tig welded. armature windings are impregnated with synthetic resin and properly baked at designed temp. To give complete protectionagainst damage from moisture, acids and alklies. main poles are made from thick laminations (g.i.sheet). high – electro – graphite carbon brushes used.