elect2 - Dynamo-Electric Dynamo-Electric Generators...

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Unformatted text preview: Dynamo-Electric Dynamo-Electric Generators Terminology u Magneto-Electric t Permanent Magnet Field Systems u Soren Hjorth u Siemen’s Armature u Self-Excited Field u Henry Wilde u S. A. Varley u Wheatstone u Dynamic Electricity t Electricity Generated By Rotary Motion u Dynamo-Electric (Dynamos) t Electromagnetic Or Wound Field Systems t Mechanical Into Electrical Energy u Electro-Dynamic t Electric Motor u Alternator t Alternate Current Generator Soren Hjorth u British u “An Patent # 806 (1855) Improved Magneto-Electric Battery” E. W. von Siemens t Never Built u Electric Generator t Main Excitation Derives From Electromagnets w t Previously Permanent Magnets u Close To Principle Of Self-Excitation Kept Armature Coils Within Field Of High Intensity u “H” Or 2-Polar Shuttle Armature u t Patent - 1856 u Advantages t Higher Working Speeds t Smaller Relative Dimensions Henry Wilde (1833-1919) S. A. Varley 1866 u Self-Excited Electromagnetic Generator u u u Patent # 3006 (1863) Combination Of t Electromagnetic Generator t Magneto-Electric Exciter u u Self-Excited Field Later Called A DynamoElectric Generator t Pulsating DC Current u Used In Electroplating Industry Charles Charles Wheatstone (1802-1875) Dynamos u Unidirectional u Utilized t Siemens Armature t 2-Segment Commutator u Produced Pulsating Unidirectional Current Pulsating Current t 2 Segment Commutator t Today, Half-Wave Rectifiers t Produced Eddy Or Circulating Currents In Cores Of Field And Coil t Resulted In Heat Build Up t Water Cooled u Led To t Ring Armature t Multi-Segment Commutator Antonio Pacinotti (1841-1912) u Gramme Armature & Successors 1860 t Ring Armature (Multiple Armature Coils) t Multi-Segment Commutator u u Gramme Dynamo Or Electric Motor u Drum Armature & Halske u Burgin u Wenstrom u Siemens Zenobe Gramme (1826-1901) Gramme Armature u Very u Gramme Armature (1870) t Ring Armature w t True Continuous Current t Core - Coil Of Soft-Iron Wire t Series Of Copper Wire Wound Around Core t Adjacent Ends Connected w t Junctions To Commutator t Armature Rotated In 2-Polar Magnet System Successful t Continuous Current u Uses t Lighthouse Illumination t Electroplating t Factory Illumination u Driving Force - Steam & Hand u Field Systems t Permanent Magnets t Electromagnets Gramme Gramme Company (1873) Gramme company (1874) u Ships t French (2) t Russian Clock-Tower At Westminster Powered Electric Arc Light Drum Armature u Ring Drum Armature Armature t Inefficient - Inner Portion Is Ineffective u Siemens & Halske Company t F. von Hefner Alteneck u Surface Winding Running Parallel To Drum t Greater Part Of Winding Is Employed Emil Burgin (1880s) u u Multiple Version Of Ring Armature 4 Or More Rectangular Cores t Separate Coil On Each Common Spindle u Later, Hexangonal Cores u James Wenstrom Electrical Co. Of Sweden Patent 1882 u Embed Armature Conductors In Slots Or Channels In Armature Core u Still Used Today u u ...
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