NDLI: Transfer functions of a transformer at different values of coupling coefficient

Content Provider	IET Digital Library
Author	Ayachit, Agasthya Kazimierczuk, Marian Kazimierz
Abstract	The low- and mid-frequency model of the transformer with resistive load is analysed for different values of coupling coefficients. The model comprising of coupling-dependent inductances is used to derive the following characteristics: voltage gain, current gain, bandwidth, input impedance, and transformer efficiency. It is shown that in the low- and mid-frequency range, the turns ratio between the windings is a strong function of the coupling coefficient, i.e., if the coupling coefficient decreases, then the effective turns ratio reduces. A practical transformer was designed, simulated, and tested. It was observed that the magnitudes of the voltage transfer function and current transfer function exhibit a maximum value each at a different value of coupling coefficient. In addition, as the coupling coefficient decreases, the transformer bandwidth also decreases. Furthermore, analytical expressions for the transformer efficiency for resistive loads are derived and its variation with respect to frequency at different coupling coefficients is investigated. It is shown that the transformer efficiency is maximum at any coupling coefficient if the input resistance is equal to the load resistance. Experimental validation of the theoretical results was performed using a practical transformer set-up. The theoretical predictions were found to be in good agreement with the experimental results.
Starting Page	337
Ending Page	348
Page Count	12
ISSN	1751858X
Volume Number	10
e-ISSN	17518598
Issue Number	Issue 4, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/10/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2015.0147
Journal	IET Circuits, Devices & Systems
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Coupling Coefficient Coupling-dependent Inductances Current Gain Current Transfer Function Leakage Inductances Magnetising Inductance Nonideal Transformer Power Transformer Resistive Load Transfer Function Transformer And Reactors Voltage Gain Voltage Transfer Function Winding Dc Resistances
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Magnetising-current-assisted wide ZVS range push–pull DC/DC converter with reduced circulating energy

Coupled-inductor-based high-gain converter utilising magnetising inductance to achieve soft-switching with low voltage stress on devices

Secondary-side phase-shifted full-bridge converter with reset winding

LL-delta structure for CS featuring high-PTC

Magnetising inductance of multiple-output flyback dc–dc convertor for discontinuous-conduction mode

Three-winding transformer based asymmetrical dual active bridge converter

High step-up single switch quadratic modified SEPIC converter for DC microgrid applications

Analysis and implementation of a new soft switching DC/DC PWM converter

Novel three-level T-type isolated bidirectional DC–DC converter

Transfer functions of a transformer at different values of coupling coefficient

Similar Documents

Magnetising-current-assisted wide ZVS range push–pull DC/DC converter with reduced circulating energy

Coupled-inductor-based high-gain converter utilising magnetising inductance to achieve soft-switching with low voltage stress on devices

Secondary-side phase-shifted full-bridge converter with reset winding

LL-delta structure for CS featuring high-PTC

Magnetising inductance of multiple-output flyback dc–dc convertor for discontinuous-conduction mode

Three-winding transformer based asymmetrical dual active bridge converter

High step-up single switch quadratic modified SEPIC converter for DC microgrid applications

Analysis and implementation of a new soft switching DC/DC PWM converter

Novel three-level T-type isolated bidirectional DC–DC converter

Transfer functions of a transformer at different values of coupling coefficient