Two-phase modulation technique for three-level inverter-fed AC drives

Two-phase modulation technique for three-level inverter-fed AC drives

Two-phase dipolar and unipolar modulation techniques for three-level three-phase inverters are suggested and compared with conventional three-phase pulsewidth modulation (PWM) techniques. Two-phase PWMs with 60/spl deg/ (0/spl deg/ and /spl plusmn/30/spl deg/ shift) and 120/spl deg/ cycles are inves...

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Veröffentlicht in:IEEE transactions on industrial electronics (1982) 2000-12, Vol.47 (6), p.1200-1211
Hauptverfasser: Halasz, S., Huu, B.T., Zakharov, A.
Format: Artikel
Sprache:eng
Schlagworte:
DC motors
Electric potential
Frequency
Inverters
Modulation
Motor drives
Motors
Phase modulation
Pulsation
Pulse duration modulation
Pulse inverters
Pulse width modulation
Pulse width modulation inverters
Space vector pulse width modulation
Torque
Voltage
Voltage control
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Beschreibung
Zusammenfassung:Two-phase dipolar and unipolar modulation techniques for three-level three-phase inverters are suggested and compared with conventional three-phase pulsewidth modulation (PWM) techniques. Two-phase PWMs with 60/spl deg/ (0/spl deg/ and /spl plusmn/30/spl deg/ shift) and 120/spl deg/ cycles are investigated from the point of view of harmonic losses, motor voltage spectra, and torque pulsations. It is shown that two-phase dipolar PWMs have no advantages in comparison with three-phase PWMs, while two-phase unipolar PWMs-in contrast with three-phase PWMs-considerably decrease the motor harmonic losses and torque pulsations in the whole motor voltage region. At the same time, the inverter neutral point control requires reversing to three-phase PWM technique for the duration of the control.
ISSN:0278-0046
1557-9948
DOI:10.1109/41.887947