Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM
Design of DC-DC converters like Cuk and SEPIC, which are fourth-order converters, play a vital role in the design of electric vehicle (EV) charging systems and drivers for LED. These converters possess a unique feature of input current being continuous due to the presence of an inductor in series wi...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/4/392 |
| _version_ | 1797414211056304128 |
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| author | Sumukh Surya Sheldon Williamson |
| author_facet | Sumukh Surya Sheldon Williamson |
| author_sort | Sumukh Surya |
| collection | DOAJ |
| description | Design of DC-DC converters like Cuk and SEPIC, which are fourth-order converters, play a vital role in the design of electric vehicle (EV) charging systems and drivers for LED. These converters possess a unique feature of input current being continuous due to the presence of an inductor in series with the supply voltage. In the present work, a generalized approach for obtaining the frequency response of the transfer function of the duty cycle to output voltage (G<sub>vd</sub>) for converters operating in continuous conduction mode (CCM) having two switches is proposed. A practical Cuk converter and SEPIC operating in CCM were selected and their analyses in open loop were studied using the LTSpice simulation tool. The behavior of the output voltage and inductor currents under variable ESR’s (equivalent series resistance) of inductors was studied. It was observed that G<sub>vd</sub> of these converters was unstable. Hence, an appropriate controller to stabilize the system and achieve a proper gain margin and phase margin in closed-loop operation is required. |
| first_indexed | 2024-03-09T05:29:46Z |
| format | Article |
| id | doaj.art-e8b39d91b69d47cca61b2a246a7cd154 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T05:29:46Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-e8b39d91b69d47cca61b2a246a7cd1542023-12-03T12:34:20ZengMDPI AGElectronics2079-92922021-02-0110439210.3390/electronics10040392Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCMSumukh Surya0Sheldon Williamson1KPIT Technologies Limited, Bengaluru, Karnataka 560103, IndiaInstitute of Technology, University of Ontario, Oshawa, ON L1G 0C5, CanadaDesign of DC-DC converters like Cuk and SEPIC, which are fourth-order converters, play a vital role in the design of electric vehicle (EV) charging systems and drivers for LED. These converters possess a unique feature of input current being continuous due to the presence of an inductor in series with the supply voltage. In the present work, a generalized approach for obtaining the frequency response of the transfer function of the duty cycle to output voltage (G<sub>vd</sub>) for converters operating in continuous conduction mode (CCM) having two switches is proposed. A practical Cuk converter and SEPIC operating in CCM were selected and their analyses in open loop were studied using the LTSpice simulation tool. The behavior of the output voltage and inductor currents under variable ESR’s (equivalent series resistance) of inductors was studied. It was observed that G<sub>vd</sub> of these converters was unstable. Hence, an appropriate controller to stabilize the system and achieve a proper gain margin and phase margin in closed-loop operation is required.https://www.mdpi.com/2079-9292/10/4/392CCMcircuit averagingCukduty cycleinstabilityLTSpice |
| spellingShingle | Sumukh Surya Sheldon Williamson Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM Electronics CCM circuit averaging Cuk duty cycle instability LTSpice |
| title | Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM |
| title_full | Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM |
| title_fullStr | Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM |
| title_full_unstemmed | Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM |
| title_short | Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM |
| title_sort | generalized circuit averaging technique for two switch pwm dc dc converters in ccm |
| topic | CCM circuit averaging Cuk duty cycle instability LTSpice |
| url | https://www.mdpi.com/2079-9292/10/4/392 |
| work_keys_str_mv | AT sumukhsurya generalizedcircuitaveragingtechniquefortwoswitchpwmdcdcconvertersinccm AT sheldonwilliamson generalizedcircuitaveragingtechniquefortwoswitchpwmdcdcconvertersinccm |