POLITECHNIKA WARSZAWSKA

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4. ANN based Current Controllers not going to zero vector the Pulse Polarity Consistency Rules (PPCR) is violated. To eliminate these disadvantages and force the NN regulator to select zero vectors and only adjacent active vectors a modified sampling technique is proposed (Fig. 4.12.). a) ε A K S&H S A ε B K S&H S B ε C K S&H S C b) SH A SH B SH C Fig. 4.12. Improved NN regulator : a) block scheme, b) modified sampling technique When the sign of the NN outputs signals are sampled not at the same instant but with a phase shift (Fig. 4.12b) i.e.2π/3, the regulator output signals S A ,S B ,S C can have the same values. The inverter under such control operates as shown in Table 4.4. and illustrates in Fig. 4.14. 59
4. ANN based Current Controllers Table 4.4 Voltage Vector Selection For Improved NN Regulator , , , , , , , , , Fig. 4.13. Operation of the improved NN regulator from Note that in contrast to conventional sampling case (Fig. 4.11b), the improved NN regulator selects systematically the zero voltage vectors and always chooses adjacent active vectors (see voltage vector time sequence and switching trajectory in α-β coordinates Fig. 4.14b). 60
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POLITECHNIKA WARSZAWSKA WARSAW UNIV
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Contents 1. Introduction 4 2. Mathe
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1. Introduction 1. INTRODUCTION The
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1. Introduction In the author’s o
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5. Speed estimation of induction mo
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5.3.1.2. Improved method based on t
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Therefore, the discrete model of st
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6. ANN sensorless Field Oriented Co
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7. Simulation and experimental resu
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8. Conclusions 8. CONCLUSIONS The r
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References REFERENCES Books and Ove
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References [34] D. Schauder, and R.
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References [66] A. Tripathi and P.
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References [97] J. W. Kolar, H. Ert
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References [129] M. P. Kazmierkowsk
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A1. Description of the simulation p
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A2. Laboratory setup A2. Laboratory
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A2. Laboratory setup A2.3. dSpace D
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A2. Laboratory setup Offset calibra
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A2. Laboratory setup consists of an
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A3. Motor parameters A3. MOTOR PARA
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A4. Notation - u s - stator voltage
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POLITECHNIKA WARSZAWSKA

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