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

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Symbols Employed Main Symbols 2π 1 3 3 a = e j = − + j – complex unit vector 2 2 C – 1 capacitance, absolute value C = C 1 + C 2 – DC-link capacitor capacitance, C min_VSR – minimum capacitance value of the DC-link capacitor for AC/DC/AC converter with VSR, C di – capacitance of DC-link capacitor for AC/DC/AC converter with diode ( D ,D , D ) A B C rectifier, D – duty cycle of the VSR, D 2 – E – duty cycle of the VSI, internal voltage induced in the motor winding (EMF), absolute value, E ,E , E – instantaneous values of the voltage induced in the motor A B C windings, e – error of control variables for example e Ω , m f L – f s – line voltage frequency, sampling frequency, f sw – switching frequency, I – current, absolute value, I A ,I B , I C – instantaneous values of the phase currents generally, I c – current in DC-link capacitor, I dc – current on the VSR output, I load – current on the VSI input,
Symbols Employed I L – I LA I r – ra ,I LB rb line current space vector, , I LC – instantaneous values of the line phase currents, rotor current space vector, I ,I , I – instantaneous values of the rotor phase currents, rc I S – stator current space vector, I SA ,I SB , I SC – instantaneous values of the stator phase currents, I Sd , I Sq – stator current vector components of the induction motor in field-oriented dq coordinates, I Sx , I Sy – stator current vector components of the induction motor in Sα Sβ field-oriented xy coordinates, I , I – stator current vector components of the induction motor in stationary αβ coordinates, J – k – L – moment of inertia, space vector generally, inductance, absolute value L – input (AC line side) choke phase inductance, L M L r – L S – – main, magnetizing inductance, rotor winding self-inductance, stator winding self-inductance, L Sσ – stator winding leakage inductance, L σ – total leakage inductance of the induction motor, M – M – mutual inductance, absolute value, torque, absolute value, M – virtual torque –VT, M e – electromagnetic torque, M L – load torque, M N – nominal torque, m s – P – number of phases, active power, absolute value, P e – electromagnetic power, 137
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POLITECHNIKA WARSZAWSKA WARSAW UNIV
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Acknowledgements The work presented
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Contents 4.2.2. Energy of the DC-li
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Chapter 1 1. Introduction 1.1. AC/D
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1. Introduction Tab. 1. 1. Current
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1. Introduction DC-link voltage to
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1. Introduction then nominal speed
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1. Introduction [69]. From that tim
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Chapter 2 2. Voltage Source Convert
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2. Voltage Source Converters - VSC
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Chapter 3 3. Vector Control Methods
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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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Page 133 and 134: References [18] G. Buja, M. P. Kazm
Page 135 and 136: References [58] J. G. Kassakian, M.
Page 137 and 138: References [96] H. Mao, D. Boroyevi
Page 139 and 140: References [133] A. Tripathi, A. M.
Page 141: References [167] M. Jasiński, D.
Page 145 and 146: Symbols Employed U pA ,U pB , U pC
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