Direct Power and Torque Control of AC/DC/AC Converter-Fed ...

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2. Voltage Source Converters – VSC β α Fig. 2. 4. VSC AC side voltage represented as a space vector 2.4. Mathematical Model of the VSI - Fed Induction Motor (IM) To present basic control methods of VSI-fed IM (see Fig. 2. 5 and Fig. 2. 6), the space vector based IM mathematical model will be presented and discussed in this Subsection. The fundamental-wave IM model is developed under following idealized assumptions [63], [134], [140]: • the object is a symmetrical, three-phase motor, • only the basic harmonics are considered while the higher harmonics of the spatial field distribution and magnetomotive force – MMF in the air gap are disregarded, • the spatially distributed stator and rotor windings are represented by a virtual so-called concentrated coil, • the effects of anisotropy, magnetic saturation, iron losses and eddy currents are neglected, • the coil resistances and reactances are assumed to be constant, 14
2. Voltage Source Converters – VSC • the current and voltage are taken to be sinusoidal ( in many cases, especially when considering steady states), Fig. 2. 5. VSI with IM equivalent circuit: a) three phase system; b) single phase equivalent circuit a) Motoring Regenerating b) jL I Sσ S R I Sr S U s Ψ I s E Ψ E U s jL I Sσ S R I Sr S I s Fig. 2. 6. Pictorial phasor diagrams for VSI-fed IM drive 15
Page 1 and 2: POLITECHNIKA WARSZAWSKA WARSAW UNIV
Page 3 and 4: Acknowledgements The work presented
Page 5 and 6: Contents 4.2.2. Energy of the DC-li
Page 7 and 8: Chapter 1 1. Introduction 1.1. AC/D
Page 9 and 10: 1. Introduction Tab. 1. 1. Current
Page 11 and 12: 1. Introduction DC-link voltage to
Page 13 and 14: 1. Introduction then nominal speed
Page 15 and 16: 1. Introduction [69]. From that tim
Page 17 and 18: Chapter 2 2. Voltage Source Convert
Page 19: 2. Voltage Source Converters - VSC
Page 23 and 24: 2. Voltage Source Converters - VSC
Page 39 and 40: Chapter 3 3. Vector Control Methods
Page 41 and 42: 3. Vector Control Methods of AC/DC/
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3. Vector Control Methods of AC/DC/
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3. Vector Control Methods of AC/DC/
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Chapter 4 4. Direct Power and Torqu
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4. Direct Power and Torque Control
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Chapter 5 5. Passive Components Des
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5. Passive Components Design 5.2.2.
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5. Passive Components Design a) b)
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5. Passive Components Design C T
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5. Passive Components Design Theref
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5. Passive Components Design motor
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Chapter 6 6. Simulation an Experime
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6. Simulation and Experimental Resu
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Chapter 7 7. Summary and Conclusion
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7. Summary and Conclusion • easy
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References [18] G. Buja, M. P. Kazm
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References [58] J. G. Kassakian, M.
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References [96] H. Mao, D. Boroyevi
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References [133] A. Tripathi, A. M.
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References [167] M. Jasiński, D.
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Symbols Employed I L - I LA I r - r
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Symbols Employed U pA ,U pB , U pC
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A. Appendices A.1. Space vector in
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Appendices In the special condition
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Appendices A.2. Coordinate Transfor
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Appendices S 3 UI 2 m s * * = = - a
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Appendices Tab. A. 4. 3. Date of th
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Appendices LINE L1 L C F Fig. A. 4.
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Appendices Tab. A. 4. 6. Data of th
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Direct Power and Torque Control of AC/DC/AC Converter-Fed ...

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