Wind_Energy_Essentials_Lecture 4

Mohan 2010 28 basic basic structure stator air gap

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Unformatted text preview: h a Squirrel-Cage Rotor: Squirrel b axis ib 2 / 3 2 / 3 2 / 3 a axis ia ic c axis © Copyright N. Mohan 2010 32 Production of Magnetic Field a ima b imb c imc a 0 o 60 o 120 o 180 o 240 o 300 o 360 o t http://www.ece.umn.edu/users/riaz/animations/spacevectors.html © Copyright N. Mohan 2010 33 Induced Voltages in the Rotor Rotor Bars at t 0 m syn vs a axis syn Bms © Copyright N. Mohan 2010 34 Induced Voltages and currents in the rotor Bars m,ir ' m,ir at t 0 ebar m net flux = 0 vs a axis Rbar ima ira ' ibar ( ) syn Bms front end-ring back end-ring © Copyright N. Mohan 2010 35 Slip frequency (fslip) in the rotor circuit slip syn - m f slip f slip syn © Copyright N. Mohan 2010 36 Torque – Speed Characteristics Tem,rated 0 m,rated slip,rated syn,ratedm http://www.ece.umn.edu/users/riaz/animations/sqmoviemotgen.html © Copyright N. Mohan 2010 37 Doubly-Fed Induction Generator: Source: © Copyright N. Mohan 2010 38 Power Electronics Basics 161 kV V 0 Time Low-Voltage Ride-Through 0 690V 10 60 Hz Generator 690V 34.5 kV 60 Hz 39 Power Electronic...
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This note was uploaded on 02/26/2011 for the course EE 523 taught by Professor Dr.hopkins during the Spring '11 term at SUNY Buffalo.

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