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The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesa...
The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesa...
The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesa...
The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesa...
The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesa...
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A pwm plus phase shift controlled interleaved isolated boost converter based on semiactive quadrupler rectifier for high step-up applications

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A PWM Plus Phase-Shift Controlled Interleaved Isolated Boost Converter Based on Semiactive Quadrupler Rectifier for High Step-Up Applications

Semiactive quadrupler rectifiers (SAQRs) are proposed in this paper to serve as the secondary rectification circuits, which make the secondary-side voltages to be controllable and help reduce current stress and conduction losses. An interleaved isolated boost converter is developed based on the proposed SAQRs. By utilizing the pulse-width modulation (PWM) plus phase-shift (PPS) control strategy, the primary- and secondary-side voltages are well matched to reduce the current values and circulating conduction losses. With the proposed SAQRs, the voltage gain is extended and the voltage stresses on power devices and passive components used in rectification circuits are reduced to the half of the high output voltage. Hence, the efficiency is improved by using a transformer with a smaller turns ratio and reduced parasitic parameters, and by employing low-voltage rating devices with better switching and conduction performance. With optimal design, lower voltage, and current stresses on the primary-side switches, minimized input current ripple can be realized. Moreover, the zero-voltage turn on switching of the active switches and the zero-current turn off switching of the diodes can be achieved over a wide load and voltage range by the proposed SAQR-based converter and the control strategy. Meanwhile, the higher voltage gain, the lower voltage, and the current stresses on power devices can be obtained with the proposed SAQR-based converter compared with passive quadrupler rectifier-based converter. The feasibility and effectiveness of the proposed SAQRs and the derived converter are verified by a 380-V output prototype.


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A pwm plus phase shift controlled interleaved isolated boost converter based on semiactive quadrupler rectifier for high step-up applications

  1. 1. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : projects@lemenizinfotech.com A PWM plus Phase-Shift Controlled Interleaved Isolated Boost Converter Based on Semiactive Quadrupler Rectifier for High Step-Up Applications Introduction: Power systems sourced by renewable energy sources and batteries have been becoming the effective solutions to compensate the global energy shortage and environmental problems. Commonly the two-stage configuration constructed by a front-end dc–dc converter and a grid- connected inverter is widely used, due to the low output voltages of these renewable energy sources and batteries. Hence, the high step-up voltage-conversion ratio is required for the dc–dc stage to convert the low voltages into a sufficiently high voltage for the inverter. Meanwhile, the galvanic isolation is expected to be implemented in the dc–dc stage rather than in the inverter stage to reduce the size of the isolation transformer and to increase the overall system efficiency [6]. Besides, the low-voltage stresses on power devices are desired not only for cost reduction but also for efficiency improvement by using the low-voltage rating devices with better conduction/switching performance. Existing system: DAB converter is a preferred option, as it has a small component count, offers isolation, and allows for high power operation. In addition,
  2. 2. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : projects@lemenizinfotech.com it has the ability to accommodate a wide range of voltage levels, as it may be controlled to operate in buck or boost modes. Drawbacks:  Single phase-shift (SPS) control draws a large reactive current component at low operating power levels, which increases the converter conduction losses.  It needs larger dc-link capacitor  switching losses is high  Conduction loss is high  Magnitude of bridge current is high Proposed system: Semiactive quadrupler rectifiers (SAQRs) are proposed to serve as the secondary rectification circuits, which make the secondary-side voltages to be controllable and help reduce current stress and conduction
  3. 3. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : projects@lemenizinfotech.com losses. An interleaved isolated boost converter is developed based on the proposed SAQRs. By utilizing the pulse-width modulation (PWM) plus phase-shift (PPS) control strategy, the primary- and secondary-side voltages are well matched to reduce the current values and circulating conduction losses. With the proposed SAQRs, the voltage gain is extended and the voltage stresses on power devices and passive components used in rectification circuits are reduced to the half of the high output voltage. Hence, the efficiency is improved by using a transformer with a smaller turn’s ratio and reduced parasitic parameters, and by employing low-voltage rating devices with better switching and conduction performance. With optimal design, lower voltage, and current stresses on the primary-side switches, minimized input current ripple can be realized. Moreover, the zero-voltage turn on switching of the active switches and the zero-current turn off switching of the diodes can be achieved over a wide load and voltage range by the proposed SAQR-based converter and the control strategy. Advantages:
  4. 4. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : projects@lemenizinfotech.com  The voltage stresses on the components in SAQRs are reduced to half of the output voltage which extends the voltage conversion ratio.  Low-voltage rating switching devices with better conduction and switching performance have been used to improve efficiency. Moreover, the ZVS turn on of the active switches and the ZCS turn off have been achieved by the proposed PWM PPS modulation.  Low-voltage stresses on the primary-side switches together with the reduced input current ripple and peak/rms values have been obtained to improve the conversion efficiency. Applications:  High step-up applications.
  5. 5. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : projects@lemenizinfotech.com Block diagram: Semi Active Quadrupler Micro Controller Circuit Buffer Circuit 5V DC Interleaved boost Converter Input DC Supply Isolation Transformer Driver Circuit 12V DC Output Filters Load Isolation Circuit

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