NDLI: Switching Frequency Variation Control in Hysteresis PWM Controller for IM Drives Using Variable Parabolic Bands for Current Error Space Phasor

Content Provider	IEEE Xplore Digital Library
Author	Tekwani, P.N. Kanchan, R.S. Sanjay, L. Gopakumar, K.
Copyright Year	2006
Description	Author affiliation: Centre for Electron. Design & Technol., Indian Inst. of Sci., Bangalore (Tekwani, P.N.; Kanchan, R.S.; Sanjay, L.; Gopakumar, K.)
Abstract	Variation of switching frequency over the entire operating speed range of an induction motor (IM) drive is the major problem associated with conventional two-level three-phase hysteresis controller as well as the space phasor based PWM hysteresis controller. This paper describes a simple hysteresis current controller for controlling the switching frequency variation in the two-level PWM inverter fed IM drives for various operating speeds. A novel concept of continuously variable hysteresis boundary of current error space phasor with the varying speed of the IM drive is proposed in the present work. The variable parabolic boundary for the current error space phasor is suggested for the first time in this paper for getting the switching frequency pattern with the hysteresis controller, similar to that of the constant switching frequency voltage-controlled space vector PWM (VC-SVPWM) based inverter fed IM drive. A generalized algorithm is also developed to determine parabolic boundary for controlling the switching frequency variation, for any IM load. Only the adjacent inverter voltage vectors forming a triangular sector, in which tip of the machine voltage vector lies, are switched to keep current error space vector within the parabolic boundary. The controller uses a self-adaptive sector identification logic, which provides smooth transition between the sectors and is capable of taking the inverter up to six-step mode of operation, if demanded by drive system. The proposed scheme is simulated and experimentally verified on a 3.7 kW IM drive
Starting Page	2099
Ending Page	2104
File Size	7804900
Page Count	6
File Format	PDF
ISBN	1424404967
DOI	10.1109/ISIE.2006.295897
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-09
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation Switching frequency Hysteresis Error correction Pulse width modulation inverters Induction motors Voltage control Space vector pulse width modulation Control systems Pulse inverters
Content Type	Text
Resource Type	Article

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