A New Neutral-Point-Clamped PWM Inverter


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    		Views: (2013)   Date: (Publication Date: Sept. 1981)   Pages: ()

  • Author:  Nabae  Akira Takahashi  Isao Akagi  Hirofumi Faculty of Engineering  Technological University of Nagaoka  Nagaoka 949-54  Japan.;  

  • Abstract:  Abstract A new neutral-point-clampe d pulsewidth modulation (PWM) inverter composed of main switching devices which operate as switches for PWM and auxiliary switching devices to clamp the output terminal potential to the neutral point potential has been developed. This inverter output contains less harmonic content as compared with that of a conventional type. Two inverters are compared analytically and experimentally. In addition, a new PWM technique suitable for an ac drive system is applied to this inverter. The neutral-point-clampe d PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.

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