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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Two-phase modulation technique for three-level inverter-fed AC drives
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Two-phase modulation technique for three-level inverter-fed AC drives

机译：三电平逆变器馈电交流驱动器的两相调制技术

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摘要

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.
机译：提出了用于三电平三相逆变器的两相双极和单极调制技术，并将其与传统的三相脉冲宽度调制（PWM）技术进行了比较。从谐波损耗，电机电压谱，功率因数的角度研究了具有60 / spl deg /（0 / spl deg /和/ spl plusmn / 30 / spl deg /移位）和120 / spl deg /周期的两相PWM。和扭矩脉动。结果表明，与三相PWM相比，两相双极PWM没有优势，而与三相PWM相比，两相单极PWM则在整个电机电压区域内均显着降低了电机谐波损耗和转矩脉动。同时，逆变器中性点控制需要在控制期间转换为三相PWM技术。

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