8412_slides_topic3

8412_slides_topic3 - EE8412 Advanced AC Drive Systems Topic...

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1 1 EE8412 Advanced AC Drive Systems Topic 3 Power Converter Topologies Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 Courtesy of ABB 2 Lecture Topics 1) Two-level Voltage Source Inverters 2) Cascaded H-bridge (CHB) Inverters 3) Neutral Point Lamped (NPC) Inverters 4) Current Source Converters EE8412 Advanced AC Drive Systems Power Converter Topologies EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
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2 3 Inverter Configuration d C d V 1 S 2 S 3 S 5 S 4 S 6 S 1 D 2 D 3 D 4 D 5 D 6 D 1 g 3 g 5 g 2 g 4 g 6 g A i A B C O P N LOAD B i C i Assumption: dc capacitor very large dc voltage ripple free Topic 3 Power Converter Topologies Two-level Voltage Source Inverter EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 4 Square Wave Operation Why called two-level? v AN = 0 or = V d t ω t t t t t t t π 2 3 3 3 d V d V AB v BN v AN v 0 CN v AO v 0 0 0 0 0 A i 1 g v 2 g v 3 g v 4 g v 5 g v 6 g v 3 2 / d V 3 / d V 2 Current-carrying devices in leg A 4 S 4 D 1 S 1 D 1 S 2 S 3 S 5 S 4 S 6 S 1 D 2 D 3 D 4 D 5 D 6 D 1 g 3 g 5 g 2 g 4 g 6 g A i A B C P N B i C i d C d V Gating arrangements 60° apart Conduction angle: 180° Complementary gating: S 1 on S 4 off S 3 on S 6 off S 5 on S 2 off During first 60° period S 1 on , V AN = V d S 6 on, V BN = 0 S 5 on, V CN = V d Topic 3 Power Converter Topologies Two-level Voltage Source Inverter EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
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3 5 Inverter Output Voltage Line-to-line voltage + = = ) 6 ( sin 6 cos 4 ... , 13 , 11 , 7 , 5 , 1 π ω t n n n V v n d AB Fundamental-frequency voltage d d AB V V V 78 . 0 6 cos 2 4 1 = = rms voltage d d d d AB AB V V t d V t d V t d v V 816 . 0 3 2 ) ( ) ( ) ( ) ( 2 1 ) ( 2 1 2 / 1 3 / 2 0 3 / 5 2 2 2 / 1 2 0 2 = = + = = ∫∫ ππ Topic 3 Power Converter Topologies Two-level Voltage Source Inverter EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 6 Load Phase Voltage Phase voltage calculation = = = 3 / ) ( 3 / ) ( 3 / ) ( BC CA CO AB BC BO CA AB AO v v v v v v v v v Fourier expression rms value () t n V n v n d AO sin 2 ... , 13 , 11 , 7 , 5 , 1 = = d d AO AO V V t d v V 47 . 0 3 2 ) ( ) ( 2 1 2 / 1 2 0 2 = = = d C d V 1 S 2 S 3 S 5 S 4 S 6 S 1 D 2 D 3 D 4 D 5 D 6 D 1 g 3 g 5 g 2 g 4 g 6 g A i A B C O P N LOAD B i C i Topic 3 Power Converter Topologies Two-level Voltage Source Inverter EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
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4 7 Topic 3 Power Converter Topologies Two-level Voltage Source Inverter EE8412 Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 Modulating and Carrier Waves v cr – Carrier wave (triangle) Amplitude modulation index cr m a V V m ˆ ˆ =
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This note was uploaded on 12/02/2009 for the course EE EE8412 taught by Professor Wubin during the Spring '09 term at Ryerson.

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8412_slides_topic3 - EE8412 Advanced AC Drive Systems Topic...

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