thyristors rectifiers
DESCRIPTION
Rectification of AC voltage by mean of thyristorsTRANSCRIPT
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-1
Chapter 6
Thyristor Converters
Controlled conversion of ac into dc
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-2
Thyristor Converters
Two-quadrant conversion
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-3
Primitive circuits with thyristors
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-4
Thyristor Triggering
ICs available
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-5
Full-Bridge Thyristor Converters
Single-phase and three-phase
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-6
Single-Phase Thyristor Converters
Two groups with two thyristor each
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-7
1-Phase Thyristor Converter Waveforms
Assuming zero ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-8
Average DC Output Voltage
Assuming zero ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-9
Input Line-Current Waveforms
Harmonics, power and reactive power
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-10
1-Phase Thyristor Converter
Finite ac-side inductance; constant dc output current
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-11
Thyristor Converter Waveforms
Finite ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-12
Thyristor Converter: Discontinuous Mode
This mode can occur in a dc-drive at light loads
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-13
Thyristor Converter Waveforms
PSpice-based simulation
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-14
Thyristor Converter Waveforms: Discontinuous Conduction Mode
PSpice-based simulation
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-15
DC Voltage versus Load Current
Various values of delay angle
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-16
Thyristor Converters: Inverter Mode
Assuming the ac-side inductance to be zero
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-17
Thyristor Converters: Inverter Mode
Family of curves at various values of delay angle
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-18
Thyristor Converters: Inverter Mode
Importance of extinction angle in inverter mode
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-19
Thyristor Converters: Inverter Mode
Waveforms at start-up
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-20
3-Phase Thyristor Converters
Two groups of three thyristors each
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-21
3-Phase Thyristor Converter Waveforms
Zero ac-side inductance; purely dc current
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-22
DC-side voltage waveforms assuming zero ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-23
Input Line-Current Waveform
Zero ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-24
Input line-current waveforms assuming zero ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-25
Three-Phase Thyristor Converter
AC-side inductance is included
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-26
Current Commutation Waveforms
Constant dc-side current
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-27
Input Line-Current Waveform
Finite ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-28
Input Line-Current Harmonics
Finite ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-29
Input Line-Current Harmonics
Typical and idealized
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-30
Three-Phase Thyristor Converter
Realistic load
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-31
Thyristor Converter Waveforms
Realistic load; continuous-conduction mode
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-32
Thyristor Converter Waveforms
Realistic load; discontinuous-conduction mode
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-33
Thyristor Inverter
Constant dc current
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-34
Thyristor Inverter Waveforms
Finite ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-35
Thyristor Inverter
Family of curves at various values of delay angle
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-36
Thyristor Inverter Operation
Importance of extinction angle
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-37
Thyristor Converters: Voltage Notching
Importance of external ac-side inductance
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-38
Limits on Notching and Distortion
Guidelines
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Copyright 2003 by John Wiley & Sons, Inc.
Chapter 6 Thyristor Converters 6-39
Thyristor Converter Representation
Functional block diagram