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http://dx.doi.org/10.6109/JKIICE.2009.13.5.922

An Optimized PWM Switching Strategy for an Induction Motor Voltage Control  

Han, Sang-Soo (경원대학교 IT대학 정보통신공학과)
Chu, Soon-Nam (경원대학교 공과대학 전기공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.13, no.5, 2009 , pp. 922-930 More about this Journal
Abstract
An optimized PWM switching strategy for an induction motor voltage control is developed and demonstrated. Space vector modulation in voltage source inverter offers improved DC-bus utilization and reduced commutation losses and has been therefor recognized the preferred PWM method especially in case of digital implementation. An optimized PWM switching strategy for an induction motor voltage control consists of switching between the two active and one zero voltage vector by using the proposed optimal PWM algorithm. The preferred switching sequence is defined as a function of the modulation index and period of a carrier wave. The sequence is selected by using the inverter switching losses and the current ripple as the criteria. For low and medium power application, the experimental results indicate that good dynamic response and reduced harmonic distortion can be achieved by increasing switching frequency.
Keywords
Space vector modulation; Optimized PWM switching strategy; Inverter switching losses; Current ripple;
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