148x Filetype PPT File size 1.35 MB Source: cusp.umn.edu
Part 2- 2 Seamless discussion of dynamic control and encoder-less operation T Load 0 t m 0 t ©Copyright Ned Mohan 2005, by ©Copyright Ned Mohan 2005, by permission from MNPERE permission from MNPERE Part 2- 3 What is an Electric-Motor Drive? Electric Drive Power Processing Motor Load fixed Unit (PPU) form Electric Source adjustable speed / form position (utility) Sensors Controller measured Power speed/ position Signal input command (speed / position) - Harnessing of Wind Energy ©Copyright Ned Mohan 2005, by - ©Copyright Ned Mohan 2005, by permission from MNPERE permission from MNPERE Hybrid Electric Vehicles Part 2- 4 Power Processing Unit aa aa bb VV bb cc dd cc VV dd aaccmmoottoorr vv ((tt)) ccoonnttrrooll,,aa qq ((tt)) qq ((tt)) qq ((tt)) aa bb cc dd ((tt)) dd ((tt)) dd ((tt)) vv ((tt)) aa bb cc ccoonnttrrooll,,bb vv ((tt)) ccoonnttrrooll,,cc vv ((tt)) ttrrii Reference Book: First Course on Power Electronics by Ned Mohan, published by MNPERE (See www.MNPERE.com for details). ©Copyright Ned Mohan 2005, by ©Copyright Ned Mohan 2005, by permission from MNPERE permission from MNPERE Part 2- 5 Equivalent Windings in A Squirrel-Cage Rotor b axis B axis Stator m ib i (t) i (t)i (t) 0 A axis a b c m 3 iB a axis L L i m m,1 phase A i 2 i a C L L L s s m ic c axis C axis Rotor (a) i ib B i (t) i (t)i (t) 0 A B C i vb vB 0 R A 3 R i r L L s a m m,1 phase vA 0 2 v va c vC 0 L L L r r m i i C c Stator circuit Rotor circuit (b) (b) Mutual Figure 2-5 Rotor circuit represented by three-phase windings. L L cos ©Copyright Ned Mohan 2005, by aA m,1 phase m permission from MNPERE Part 2- 6 Dynamic Analysis of Induction Machines in Terms of dq-Windings ©Copyright Ned Mohan 2005, by permission from MNPERE
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