NDLI: Improved PWM control for GTO inverters with pulse number modulation

Content Provider	IEEE Xplore Digital Library
Author	Tadakuma, S. Tanaka, S. Miura, K. Ofosu-Amaah, W.
Copyright Year	1994
Description	Author affiliation: Heavy Apparatus Eng. Lab., Toshiba Corp., Tokyo, Japan (Tadakuma, S.; Tanaka, S.; Miura, K.; Ofosu-Amaah, W.)
Abstract	A pulse width modulated (PWM) inverter using GTOs is one of the promising power converters for AC motor drives. There are, however, still some unsolved problems with GTO inverters: (1) the modulation factor of conventional GTO inverters is limited to about 0.8 in order to maintain the minimum on-time of every GTO. If a modulation factor of 1.0 is possible in the bridge-type inverter, the output capacity would be larger in proportion to the modulation factor. The pulse number modulation (PNM) is proposed as an effective measure for this modulation factor improvement; and (2) the minimum on-time of a GTO brings about uncontrollability for a low voltage reference in the neutral point clamped (NPC) inverter. The authors propose a new procedure using the PNM technique to solve this voltage uncontrollability. The PNM method contributes to make an equivalent unity modulation factor in PWM inverters and to linearize voltage control characteristics in NPC inverters.<>
Starting Page	1063
Ending Page	1068
File Size	449577
Page Count	6
File Format	PDF
ISBN	0780319931
DOI	10.1109/IAS.1994.377549
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation inverters Space vector pulse width modulation Low voltage Pulse width modulation converters Pulse measurements Bridge circuits Pulse width modulation Pulse inverters Voltage control Pulse modulation
Content Type	Text
Resource Type	Article

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