An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM
This paper presents an Optimized Sensorless Charge Balance (OSCB) controller based on a damped current model for flyback converter operating in Discontinuous Conduction Mode (DCM). By solving total differential equations of non-ideal transformer currents, the damped current model is derived with con...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/11/12/3478 |
| _version_ | 1811262886200213504 |
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| author | Xiaofeng Zhang Run Min Donglai Zhang Yi Wang |
| author_facet | Xiaofeng Zhang Run Min Donglai Zhang Yi Wang |
| author_sort | Xiaofeng Zhang |
| collection | DOAJ |
| description | This paper presents an Optimized Sensorless Charge Balance (OSCB) controller based on a damped current model for flyback converter operating in Discontinuous Conduction Mode (DCM). By solving total differential equations of non-ideal transformer currents, the damped current model is derived with consideration of parasitics, leakage inductance of transformer, and the Resistor-Capacitor-Diode (RCD) snubber circuit. Based on the proposed model, current observation and control algorithms of the Sensorless Charge Balance (SCB) controller are optimized, which forms the OSCB control strategy. The average current damping is considered in the equivalent discrete-time small signal model. Furthermore, frequency analyses show that OSCB controller achieves higher closed-loop bandwidth and lower overshoot than a SCB controller, which indicates an improved transient performance. Finally, both OSCB and conventional SCB controllers are experimentally evaluated on a flyback converter prototype. |
| first_indexed | 2024-04-12T19:34:54Z |
| format | Article |
| id | doaj.art-0f35db4ac45e47e19aa4fe2a728f2e20 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-12T19:34:54Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-0f35db4ac45e47e19aa4fe2a728f2e202022-12-22T03:19:13ZengMDPI AGEnergies1996-10732018-12-011112347810.3390/en11123478en11123478An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCMXiaofeng Zhang0Run Min1Donglai Zhang2Yi Wang3Harbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, ChinaHarbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, ChinaHarbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, ChinaThis paper presents an Optimized Sensorless Charge Balance (OSCB) controller based on a damped current model for flyback converter operating in Discontinuous Conduction Mode (DCM). By solving total differential equations of non-ideal transformer currents, the damped current model is derived with consideration of parasitics, leakage inductance of transformer, and the Resistor-Capacitor-Diode (RCD) snubber circuit. Based on the proposed model, current observation and control algorithms of the Sensorless Charge Balance (SCB) controller are optimized, which forms the OSCB control strategy. The average current damping is considered in the equivalent discrete-time small signal model. Furthermore, frequency analyses show that OSCB controller achieves higher closed-loop bandwidth and lower overshoot than a SCB controller, which indicates an improved transient performance. Finally, both OSCB and conventional SCB controllers are experimentally evaluated on a flyback converter prototype.https://www.mdpi.com/1996-1073/11/12/3478DC-DC converterflybacksensorlessDCMCharge balance control |
| spellingShingle | Xiaofeng Zhang Run Min Donglai Zhang Yi Wang An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM Energies DC-DC converter flyback sensorless DCM Charge balance control |
| title | An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM |
| title_full | An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM |
| title_fullStr | An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM |
| title_full_unstemmed | An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM |
| title_short | An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM |
| title_sort | optimized sensorless charge balance controller based on a damped current model for flyback converter operating in dcm |
| topic | DC-DC converter flyback sensorless DCM Charge balance control |
| url | https://www.mdpi.com/1996-1073/11/12/3478 |
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