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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 3    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 3, March 2011 Edition
Near State PWM Algorithm with Reduced Switching Frequency and Reduced Common Mode Voltage Variations for Vector Controlled Induction Motor Drive
Full Text(PDF, 3000)  PP.  
K. Satyanarayana, J. Amarnath, A. Kailasa Rao
common mode voltage, induction motor drives, near state PWM, SVPWM, vector control.
In this paper a Near State Pulse Width Modulation (NSPWM) algorithm with reduced switching frequency is presented for vector controlled induction motor drives for reduced common mode voltage/currents. The proposed algorithm utilizes a group of three neighbor voltage vectors to construct the reference voltage space vector. In the proposed algorithm in each sector any one of the phases is clamped to either positive dc bus or negative dc bus. Hence, the proposed algorithm reduces the switching frequency and switching losses of the inverter. The simulation results illustrate that the proposed NSPWM algorithm results in reduced common mode voltage, has low switching frequency and has low switching losses of the inverter.
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