Topic 5_Synchronous_machines_Part_2

Topic 5_Synchronous_machines_Part_2 - Rotorwinding...

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Advanced Electromechanical Systems ELE847 2011 39 Modeling of SM without damper windings Rotor winding – Field winding only 2 pole machine 12 pole machine Industrial applications: Wind energy generation, and electric drives. Advanced Electromechanical Systems ELE847 2011 40 ds r λ ω qs v o o s r ls L qs s λ qs i mq L Stator circuit 1 lkq L 2 lkq L 1 kq r 2 kq r 2 kq s λ 1 kq s λ 2 kq i 1 kq i 1 kq v mq i 2 kq v No damper windings no q axis rotor circuit ds r λ ω qs v o o s r ls L qs s λ qs i mq L mq i Modeling of SM without damper windings Synchronous machine q axis circuit in the rotor reference frame
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Advanced Electromechanical Systems ELE847 2011 41 SM without damper windings qs r λ ω ds v o o s r ls L ds s λ ds i md L lkd L lfd L kd r fd r fd s λ kd s λ fd i kd i kd v md i fd v qs r λ ω ds v o o s r ls L ds p λ ds i md L dr s λ md i f I Assuming a constant field current (DC) , i fd can be replaced by I f Synchronous machine d axis circuit in the rotor reference frame Advanced Electromechanical Systems ELE847 2011 42 Simplified SM Dynamic Model in the rotor reference frame qs r λ ω ds v o o s r ls L ds s λ ds i md L dr s λ md i f I ds r λ ω qs v o o s r ls L qs s λ qs i mq L mq i + = + + = ds qs r ds s ds qs ds r qs s qs s i r v s i r v λ λ ω λ λ ω Rotor: Wound rotor excited by field current I f Modeling of SM without damper windings
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