Open ends induction motor operation based on a dual inverter

This paper presents a new model for three level inverter using dual two level inverter. A space vector PWM technique is developed based on the combination of space vector from dual inverter feeding open end winding induction motor (OEWIM). A total of ¿64¿ combinations produce ¿19¿ operating vectors which make a hexagon shape similar to that produced by neutral point clamped three - level inverter (NPC). This proposed system eliminates the NPC inverter drawbacks of bulky DC link capacitor, which carry load current that makes neutral point fluctuations and results in DC component in voltage wave form. The ¿OEWIM¿is obtained by removing neutral point using separate DC link is remove zero sequence harmonics; A soft starting for ¿OEWIM¿ is presented using V/F control scheme.