A Survey on Modified PWM Techniques for Z-Source Inverter
Penchalababu V1, Chandrakala B2, Gopal Krishna3
1Penchalababu.V, EEE Department, Sri Vasavi College of Engineering, JNTUK, Kakinada ,Tadepaliigudem, AP, India.
2Chandrakala.B, EEE Department, Lakireddy Bali Reddy College of Engineering, Mylavaram. Krishna district, A.P -India.
3Gopal Krishna, EEE Department, Sri Vasavi College of Engineering, JNTUK, Kakinada ,Tadepaliigudem, AP, India.
Manuscript received on May 17, 2012. | Revised Manuscript received on June 14, 2012. | Manuscript published on June 30, 2012. | PP: 356-362 | Volume-1 Issue-5, June 2012. | Retrieval Number: E0539061512/2012©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The proposed work presents a Z-source inverter which can be proposed as an alternative power conversion concept for variable speed AC drives. It has both buck and boost capabilities as they allow operation of the inverter in the shoot through state. It uses an exclusive Z-source network (LC component) to DC-link in between inverter and the DC source. By controlling the shoot-through duty cycle of IGBTs in inverter system, reduces the line harmonics, improves power factor, and extends output voltage range.This Paper presents different switching techniques such as Simple boost pwm, Constant boost pwm, Maximum boost pwm, Sine carrier pwm and Modified SVPWM.
Keywords: pulse width modulation, Modified SVPWM, z-source inverter.