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

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6. Simulation and Experimental Results Fig. 6. 7. Experimental torque tracking performance. Step change from – 75 % to 75% of nominal torque; a) Only DC-link voltage feedback PF 0 , b) With active power feedforward PF , c) With active power feedforward UI PF . From the top: DC-link voltage 100V/div, line current 10A/div, active 2.5kW/div and reactive 2.5kVar/div power, mechanical speed of IM 1000rpm/div, stator current 10A/div, command and estimated torque 20 Nm/div. DC-link capacitor C= 470 uF Ω 110
6. Simulation and Experimental Results a) b) c) d) Fig. 6. 8. Experimental torque tracking performance. Step change from – 75 % to 75% of nominal torque; a) With active power feedforward PF Ω , b) With active power feedforward PF UI . In case c), and d) the proportional gain of DC-link voltage controller K PU is two times higher then calculated. From the top: DC-link voltage 100V/div, line current 10A/div, active 2.5kW/div and reactive 2.5kVar/div power, mechanical speed of IM 1000rpm/div, stator current 10A/div, command and estimated torque 20 Nm/div. DC-link capacitor C= 47 uF 111
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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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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 and 142: References [167] M. Jasiński, D.
Page 143 and 144: Symbols Employed I L - I LA I r - r
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