Novel Soft Switching Isolated Dc-Dc Converters Topologies
DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate t...
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| Format: | Thesis |
| Language: | en |
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2013
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| Online Access: | http://eprints.usm.my/45255/1/Chanuri%20Charin24.pdf http://eprints.usm.my/45255/ |
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| _version_ | 1834503279753560064 |
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| author | Charin, Chanuri |
| author_facet | Charin, Chanuri |
| author_sort | Charin, Chanuri |
| building | Hamzah Sendut Library |
| collection | Institutional Repository |
| content_provider | Universiti Sains Malaysia |
| content_source | USM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | DC-DC converters are widely used in many applications such as power
supplies, PV system, renewable energy systems and industrial applications. One of the
main problems in dc-dc converters is the switching loss which affects efficiency and
also the power density of the converter. To alleviate the switching loss problem this
thesis proposes novel soft switching PWM isolated dc-dc converters topologies. Three
topologies of dc-dc converters are presented in this thesis. These are half-bridge dc-dc
converter with auxiliary circuit, full-bridge dc-dc converter with multilevel inverter
leg and full-bridge dc-dc converter with auxiliary circuit. The proposed half bridge dcdc
converter with auxiliary circuit is designed and tested both with diode bridge
rectifier and centre-tapped transformer rectifier. The proposed converters are designed
and evaluated in term of soft switching. Soft switching operations are achieved by
charging and discharging process of the flying capacitor. In proposed topologies, all
the power switches operate under soft-switching conditions. Therefore, overall
switching loss of the power switches is greatly reduced. The output voltages of the
converters are varied by PWM control. The effectiveness of the new converters
topologies is evaluated both by simulation and experimental results of a laboratory
scale down prototype. The obtained experimental results are found in good agreement
with the simulation results. The proposed half-bridge dc-dc converter with auxiliary
circuit and centre-tapped transformer rectifier has highest efficiency among all the
proposed topologies. Its efficiency is 81% at the output power of 25W, so it is
considered best among all the proposed topologies. |
| format | Thesis |
| id | my.usm.eprints.45255 |
| institution | Universiti Sains Malaysia |
| language | en |
| publishDate | 2013 |
| record_format | eprints |
| spelling | my.usm.eprints.45255 http://eprints.usm.my/45255/ Novel Soft Switching Isolated Dc-Dc Converters Topologies Charin, Chanuri TK1-9971 Electrical engineering. Electronics. Nuclear engineering DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate the switching loss problem this thesis proposes novel soft switching PWM isolated dc-dc converters topologies. Three topologies of dc-dc converters are presented in this thesis. These are half-bridge dc-dc converter with auxiliary circuit, full-bridge dc-dc converter with multilevel inverter leg and full-bridge dc-dc converter with auxiliary circuit. The proposed half bridge dcdc converter with auxiliary circuit is designed and tested both with diode bridge rectifier and centre-tapped transformer rectifier. The proposed converters are designed and evaluated in term of soft switching. Soft switching operations are achieved by charging and discharging process of the flying capacitor. In proposed topologies, all the power switches operate under soft-switching conditions. Therefore, overall switching loss of the power switches is greatly reduced. The output voltages of the converters are varied by PWM control. The effectiveness of the new converters topologies is evaluated both by simulation and experimental results of a laboratory scale down prototype. The obtained experimental results are found in good agreement with the simulation results. The proposed half-bridge dc-dc converter with auxiliary circuit and centre-tapped transformer rectifier has highest efficiency among all the proposed topologies. Its efficiency is 81% at the output power of 25W, so it is considered best among all the proposed topologies. 2013-07 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/45255/1/Chanuri%20Charin24.pdf Charin, Chanuri (2013) Novel Soft Switching Isolated Dc-Dc Converters Topologies. Masters thesis, Universiti Sains Malaysia. |
| spellingShingle | TK1-9971 Electrical engineering. Electronics. Nuclear engineering Charin, Chanuri Novel Soft Switching Isolated Dc-Dc Converters Topologies |
| title | Novel Soft Switching Isolated Dc-Dc Converters
Topologies |
| title_full | Novel Soft Switching Isolated Dc-Dc Converters
Topologies |
| title_fullStr | Novel Soft Switching Isolated Dc-Dc Converters
Topologies |
| title_full_unstemmed | Novel Soft Switching Isolated Dc-Dc Converters
Topologies |
| title_short | Novel Soft Switching Isolated Dc-Dc Converters
Topologies |
| title_sort | novel soft switching isolated dc-dc converters
topologies |
| topic | TK1-9971 Electrical engineering. Electronics. Nuclear engineering |
| url | http://eprints.usm.my/45255/1/Chanuri%20Charin24.pdf http://eprints.usm.my/45255/ |
| url_provider | http://eprints.usm.my/ |