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

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Unformatted text preview: Dynamo-Electric Generators Dynamo-Electric Soren Hjorth Siemen’s Armature Self-Excited Field Henry Wilde S. A. Varley Wheatstone Terminology Terminology Magneto-Electric Permanent Magnet Field Systems Dynamic Electricity Electricity Generated By Rotary Motion Dynamo-Electric (Dynamos) Electromagnetic Or Wound Field Systems Mechanical Into Electrical Energy Electro-Dynamic Electric Motor Alternator Soren Hjorth Soren British British Patent # 806 (1855) “An Improved Magneto-Electric Battery” Never Built Electric Generator Main Excitation Derives From Electromagnets Permanent Magnets For Initial Excitation Previously Permanent Magnets Close To Principle Of Self-Excitation “By the mutual action between the electro magnets and the armatures, anaccelerating force is obtained, which in the result produces electricity greater in quantity and intensity than has heretofore been obtained greater by any similar means” by E. W. von Siemens E. Kept Kept Armature Coils Within Field Of High Intensity Field “H” Or 2-Polar Shuttle H” Armature Armature Patent - 1856 Advantages Higher Working Speeds Smaller Relative Smaller Dimensions Dimensions Henry Wilde (1833-1919) Henry Patent # 3006 (1863) Combination Of Electromagnetic Electromagnetic Generator Generator Magneto-Electric Exciter Self-Excited Field Later Called A DynamoElectric Generator Pulsating DC Current Used Used In Electroplating Industry Industry 1866 Self-Excited S. A. Varley S. Electromagnetic Generator “An electric current, passed through the coils of An the electromagnets, secures a small amount of permanent magnetism to their cores” permanent Charles Wheatstone (1802-1875) Charles Utilized Siemens Armature 2-Segment Commutator Produced Produced Pulsating Unidirectional Current Unidirectional Dynamos Dynamos Unidirectional Pulsating Current 2 Segment Commutator Today, Half-Wave Rectifiers Produced Eddy Or Circulating Currents In Produced Cores Of Field And Coil Cores Resulted In Heat Build Up Water Cooled Led To Ring Armature Multi-Segment Commutator Antonio Pacinotti (1841-1912) Antonio 1860 Ring Armature (Multiple Armature Coils) Multi-Segment Commutator Dynamo Or Electric Motor Gramme Armature & Successors Gramme Gramme Drum Armature Siemens & Halske Burgin Wenstrom Zenobe Gramme (1826-1901) Zenobe Gramme Armature (1870) Ring Armature Pacinotti’s True Continuous Current Core - Coil Of Soft-Iron Wire Series Of Copper Wire Series Wound Around Core Wound Adjacent Ends Connected Continuous Winding Junctions To Commutator Armature Rotated In 2-Polar Armature Magnet System Magnet Gramme Armature Gramme Very Successful Continuous Current Uses Lighthouse Illumination Electroplating Factory Illumination Driving Force - Steam & Hand Field Systems Permanent Magnets Electromagnets Gramme Company (1873) Gramme Clock-Tower At Westminster Powered Electric Arc Light Gramme company (1874) Gramme Ships French (2) Russian Drum Armature Drum Ring Armature Inefficient - Inner Portion Is Ineffective Siemens & Halske Company F. von Hefner Alteneck Surface Winding Running Parallel To Drum Greater Part Of Winding Is Employed Drum Armature Drum Emil Burgin (1880s) Emil Multiple Version Of Ring Armature 4 Or More Rectangular Cores Separate Coil On Each Common Spindle Later, Hexangonal Cores James Wenstrom James Electrical Co. Of Sweden Patent 1882 Embed Armature Embed Conductors In Slots Or Channels In Armature Core Core Still Used Today ...
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