Modelling of Z and Quasi Z- Source DC-DC Converters for Variable Frequency Operation (Record no. 14681)

MARC details
000 -LEADER
fixed length control field 02849nam a22001937a 4500
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number 621.3
Item number K114M
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name Kachhwaha, Mohit
245 ## - TITLE STATEMENT
Title Modelling of Z and Quasi Z- Source DC-DC Converters for Variable Frequency Operation
Statement of responsibility, etc by Mohit Kachhwaha
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication IIT Jodhpur
Name of publisher Department of Electrical Engineering
Year of publication 2017
300 ## - PHYSICAL DESCRIPTION
Number of Pages xi,38p.
Other physical details HB
520 ## - SUMMARY, ETC.
Summary, etc "The impedance source network, proposed in the year 2002, nsists of a unique combination of<br/>two inductors and two capacitors. This network has proven its expediency over the conventional<br/>voltage source and current source networks as an efficient mean of power conversion in a wide<br/>spectrum of electric power applications. These converters, conventionally, are operated at an optimized fixed frequency. However, an<br/>optimized switching frequency may achieve its maximum efficiency only under the given set of<br/>operating conditions whilst under different operating conditions there is actually a degradation of<br/>conversion efficiency. Therefore, in an attempt to cater to energy conformity demands, to maintain<br/>constant efficiency over the entire load range, an alteration is required in the switching frequency<br/>based on the current status of the system. In this thesis, the domain of these impedance source networks is explored for variable frequency<br/>operations. The work deals with two topologies of impedance source networks, viz., traditional<br/>Z source network and quasi Z source network. Complete circuit analysis is carried out for both<br/>topologies and system models are obtained for the different modes of operation. Instead of commonly<br/>used approach of state-space averaging, an enhanced model of the converters is presented<br/>for variable frequency operation. These proposed models are achieved by considering the on-time<br/>and the off-time of the switching period as separate control variables for state-space averaging. The<br/>obtained ac small signal models are then subjected to simulation and experimentation to clearly<br/>demonstrate and confirm the accuracy of the proposal. This enhanced model, for the widely acclaimed impedance source networks, captures the dynamics<br/>of the power conversion system under variable frequency operation. The adopted averaging<br/>method is a flexible approach, wherein, responses to a constant on-time, constant off-time as<br/>well as a varying on-time and off-time can be studied. These accurate models would help to fully<br/>exploit the switching period modulation in terms of transient performance and to ensure stability<br/>in all operating conditions.<br/>i"<br/>
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term Quasi Z- Source
Topical Term DC-DC Converters
Topical Term Variable Frequency Operation
Topical Term MTech Theses
Topical Term Department of Electrical Engineering
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name Fulwani, Deepak
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Thesis
Holdings
Withdrawn status Lost status Damaged status Not for loan Collection code Permanent Location Current Location Shelving location Date acquired Full call number Accession Number Price effective from Koha item type
      Not For Loan Reference S. R. Ranganathan Learning Hub S. R. Ranganathan Learning Hub Course Reserve 2024-01-18 621.3 K114M TM00104 2024-01-18 Thesis