Original scientific paper

https://doi.org/10.17559/TV-20140430144105

Small signal modelling and implementation of push-pull based inverter with parasitics

Atila Skandarnezhad ; Iran University of Science and Technology (IUST), Tehran, Iran
Abdolreza Rahmati ; Iran University of Science and Technology (IUST), Tehran, Iran
Adib Abrishamifar ; Iran University of Science and Technology (IUST), Tehran, Iran

Abstract

The proposed PWM switch modelling technique is a simple method for modelling push-pull based single phase inverters operating in continuous conduction mode. In the design process of converters it is desirable to assess as many critical design parameters and parasitic effects by simulation as possible, since the control is hard to tune after fabrication. The main advantage of this method is its versatility and simple implementation. Furthermore, the introduced model also includes parasitic elements of the components to better estimate the converter behaviour. The resulting circuit is a time averaged model where all currents and voltages correspond to their averaged values. The validity of this model is verified by the given experimental results for a specified design example. This modelling technique helps to design the inverter effectively and better choosing the controller component values to achieve a good dynamic response. Finally, current mode controlled push-pull converter is simulated and compared with proposed modelling technique where a good accordance between them is revealed. Simulation analysis is done by Matlab 9 and Psim 6 software. The overall modelling estimation error was lower than 5 %.

Keywords

average modelling; current mode control; frequency response; parasitic components; push-pull based inverter

Hrčak ID:

149375

URI

https://hrcak.srce.hr/149375

Publication date:

14.12.2015.

Article data in other languages: croatian

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