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8412_slides_topic6 - 1 1 EE8412 Advanced AC Drive Systems...

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Unformatted text preview: 1 1 EE8412 Advanced AC Drive Systems Topic 6 Field Oriented control (FOC) Source: ABB Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 2 Lecture Topics • Field Orientation • General Block Diagram of FOC • Direct Field Oriented Control • Direct FOC with Current Controlled VSI • Indirect Field Oriented Control EE8412 Advanced AC Drive Systems Field Oriented Control (FOC) Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 2 3 • Classification of Field Orientation Topic 6 Field Oriented Control Field Orientation EE8412 • Rotor flux orientation • Stator flux orientation • Air-gap flux orientation Focus on rotor flux orientation It is relatively simple and widely used Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 4 • Torque Production in DC Motors Topic 6 Field Oriented Control Field Orientation EE8412 a f a e i K T λ = T e – electromagnetic torque K a- armature constant λ f- flux produced by field circuit i a- armature current • λ f = const → T e is proportional to i a • Flux λ f and i a can be controlled independently → high dynamic performance. (1) Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 3 5 e ω e ω r ω r θ sl θ f θ ds i qs i r λ r s i r • Rotor Flux Orientation Topic 6 Field Oriented Control Field Orientation EE8412 Rotor flux orientation is achieved by aligning the d-axis of the synchronous reference frame with the rotor flux vector λ r = qr λ r dr λ λ = and (2) Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 6 • Electromagnetic Torque Topic 6 Field Oriented Control Field Orientation EE8412 ⎪ ⎪ ⎪...
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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_topic6 - 1 1 EE8412 Advanced AC Drive Systems...

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