Topic 2_Annotation

Topic 2_Annotation - ECE 341 Topic Sequence Topic 1: Ac...

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1 ECE 341 Topic Sequence Topic 1: Ac power and three phase concepts Topic 2: Machine principles and synchronous machines Topic 3: Transformers Topic 4: Rotating transformer (induction machines) Topic 5: Power Electronics J. Wang 2011/4/12 1 From generator to load: ECE 341 Topics J. Wang 2011/4/12 2 Synchronous Generator in the concentrating solar power plant Step-up Transformer Three Phase 765 kV High Voltage Lines Step-down Transformer Three Phase 22 kV Distribution Lines Induction machines and power electronics in home appliance and Electrical Vehicles
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2 J. Wang 4/12/2011 3 s Rotational Motion: Chap. 1: 1, 2, 3 s The Magnetic Field: Chap. 1: 4, 5, 6, 7 s Linear machine: Chap. 1 : 6,7,8 s Physical construction of rotating machines: Chap. 4: 2, 3, 6 ; Chap. 5: 1 s Magnetic flux distribution: Chap. 4: 1, 2, 3 s Induced voltage: Chap. 4: 1, 4 ; Chap. 5: 2, 3 s Induced torque: Chap. 4: 1, 5 ; Chap: 5: 6 s Equivalent circuit: Chap. 5: 4, 11 (briefly) ; Chap. 6: 1, 5 s Analysis: Chap. 4: 7, 8 ; Chap. 5: 5, 7, 8 ; Chap. 6: 2, 4 Topic 2: Machine Fundamentals and Synchronous Machines ECE341 Energy Conversion (Spring 2011) J. Wang 4/12/2011 4 b The principle for operation of transformers and machines is through the magnetic field. Therefore, we study them together. B Why to use Generators? Electric Power is clean and efficient energy source that is easy to transmit over long distance. B Why to use Motors? It does not need constant ventilation and fuel like internal combustion engine. More efficient and environment friendly. B Why transformers? Reduce energy loss between point of electric power generation and point of its use. Generator, Motor, and Transformer
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3 Fundamentals of Rotational Motion J. Wang 4/12/2011 5 Rotational motion • All the electrical machines rotate about an axis called SHAFT of the machine • This rotation is either Counter Clock Wise or Clock Wise. Angular position θ • It is object’s angle w.r.t. a reference point, similar to distance in linear motion . Angular Velocity and Angular Acceleration α J. Wang 4/12/2011 6 rpm is commonly rad/sec then rad in /d d locity Angular ve dr/dt v ocity Linear vel ϖ θ = = = t (rpm) /min. rev in locity angular ve n rev/sec. in locity angular ve f rad/sec. in locity angular ve m m m = = = min / 60 n 60 2 n sec / 2 f 2 1 sec, / m m m rev f or rev rad rev rad m m m m × = × = = = π 2 rad/sec /d d : on accelerati Angular /d d : on accelerati Linear t t a α ν = =
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4 Torque, τ J. Wang 4/12/2011 7 • In linear motion when force increases the velocity will increase. • In angular motion when Torque increases the angular velocity ω increases. • The greater the torque on the object, the more rapidly it will move.
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Topic 2_Annotation - ECE 341 Topic Sequence Topic 1: Ac...

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