an investigation of dual stator winding induction machines

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Figure 10.16 Pole-zero maps under different operating conditions, (a) positive rotor speed
when slip=0.05, (b) positive rotor speed when slip=-0.05, (c) negative rotor speed
when slip=0.05, (d) negative rotor speed when slip=-0.05..................................... 401
Figure 10.17 Pole-zero maps with different k i values when
ω 377 and slip =0.05 402
Figure 10.18 Pole-zero maps with different k i values when 1 377 = ω r and slip =-0.05402
Figure 10.19 Pole-zero maps with different k i values when ω r1
= −377
and slip =0.05
................................................................................................................................. 403
Figure 10.20 Pole-zero maps with different k i values when ω r1
= −377
and slip =-0.05
................................................................................................................................. 403
Figure 10.21 Pole-zero maps with different k i values
1 = r
ki = −1
or − 3 when ω = −377
rad/s and ω r1
= −110
rad/s while the slip = - 0.05 ................................................. 404
Figure 10.22 Pole-zero maps with different k i values
r1
ki = −1or
− 4 when ω = −10
rad/s and the slip = - 0.05........................................................................................ 405
Figure 10.23 Boundary of speed estimator when slip = 0.05 ......................................... 406
Figure 10.24 Boundary of speed estimator when slip = - 0.05....................................... 406
Figure 10.25 The boundary of speed controller parameters for the 2-pole winding set. 409
Figure 10.26 The boundary of speed controller parameters for the 6-pole winding set. 410
Figure 10.27 Speed estimation for 2-pole winding set with constant
r1
k 1 = 0 , (a) actual rotor
speed and estimated rotor speed, (b) reactive power factor 1 k ................................ 412
Figure 10.28 Speed estimation for 2-pole winding set with constant k 1 = 0.
5 , (a) actual
rotor speed and estimated rotor speed, (b) reactive power factor 1 k ....................... 413