1-Phase Thyristor Converter - KTH
1-Phase Thyristor Converter - KTH
1-Phase Thyristor Converter - KTH
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1-<strong>Phase</strong> <strong>Thyristor</strong> <strong>Converter</strong><br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-1
<strong>Thyristor</strong> <strong>Converter</strong>: Discontinuous Mode<br />
• This mode can occur in a dc-drive at light loads<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-2
DC Voltage versus Load Current<br />
• Various values of delay angle<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-3
<strong>Thyristor</strong> <strong>Converter</strong>s: Inverter Mode<br />
• Assuming the ac-side inductance to be zero<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-4
<strong>Thyristor</strong> <strong>Converter</strong>s: Inverter Mode<br />
• Importance of extinction angle in inverter mode<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-5
3-<strong>Phase</strong> <strong>Thyristor</strong> <strong>Converter</strong>s<br />
• Two groups of three thyristors each<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-6
3-<strong>Phase</strong> <strong>Thyristor</strong> <strong>Converter</strong> Waveforms<br />
• Zero ac-side inductance; purely dc current<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-7
Waveforms assuming zero ac-side inductance<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-8
Input Line-Current Waveform<br />
• Zero ac-side inductance<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-9
Three-<strong>Phase</strong> <strong>Thyristor</strong> <strong>Converter</strong><br />
• AC-side inductance is included<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-10
Current Commutation Waveforms<br />
• Constant dc-side current<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-11
Input Line-Current Waveform<br />
• Finite ac-side inductance<br />
Copyright © 2003<br />
by John Wiley & Sons, Inc.<br />
1-12
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