Multiloop Controller for N-Stage Cascade Boost Converter

Ortiz-Lopez, M.G.; Leyva-Ramos, J.; Diaz-Saldierna, L. H.; Carbajal-Gutierrez, E.E.

doi:10.1109/cca.2007.4389295

Cited by 14 publications

(11 citation statements)

References 10 publications

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“…In cascaded configurations, it is noteworthy that the requirement of high rating components is increased as the number of cascaded cells increases. Moreover, complex driver circuitry is required to control several switches [16], [21]. In [22], switch voltage stress is reduced by employing additional semiconductor devices and capacitor in a quadruple converter configuration.…”

Section: Nomenclature S 1 S 2 and S 3 Active Switches R S1(on ) mentioning

confidence: 99%

High Gain Transformer-Less Double-Duty-Triple-Mode DC/DC Converter for DC Microgrid

et al. 2019

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High-gain DC/DC converters with high efficiency are needed in dc microgrid owed to the low voltage of power sources, e.g., photovoltaic-cell and fuel-cell. This paper proposed a new high-gain double-duty-triple-mode (DDTM) converter for dc-microgrid applications. The proposed DDTM converter operates in three modes to achieve higher voltage gain without utilizing transformer, coupled inductor, voltage multiplier, and multiple voltage lifting techniques, e.g., triple, quadruple voltage lift. The modes of operation of the converter are controlled through three switches with two distinct duty ratios (double duty) to achieve wide range duty ratio. The operating principle, voltage gain analysis, and efficiency analysis of the proposed converter are discussed in detail and to show its benefits comparison is provided with the existing high-gain converters. The boundary operating condition for continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is presented. The prototype of the proposed converters with 500-W power is implemented in the laboratory and experimentally investigated, which validate the performance and feasibility of the proposed converter. Due to double duty control, the proposed converter can be controlled in different ways and the thorough discussion on controlling of the converter is provided as a future scope. (min) L1 and I (min) L2 Lower peak of current through inductor L 1 and L 2 I L1 and I L2 Peak to peak current ripples of inductor L 1 , L 2 v C1 and v C2 Voltage across capacitor C 1 , C 2 V C1 and V C2 Average voltage across capacitor C 1 , C 2 v D1 and v D2 Voltage across diodes D 1 , D 2 V D1 and V D2 Average voltage across diodes D 1 , D 2 i S1 , i S2 , and i S3 Current through switches S 1 , S 2 , S 3 v S1 and v S2 Voltage across switches S 1 , S 2 v AB Voltage across AB junction (diode D + switch S 3) v 1 and v 2 Input and output voltage (average value of V 1 and V 2) R 1 Series resistance of input voltage i 1 and i 2 Input and output current I 1 and I 2 Average value of Input and output current v GS1 , v GS2 , and v GS3 Voltage magnitude of gate pulse for switches S 1 , S 2 , S 3 I, II and III (in superscript) Defines the values in Mode I, II and III χ B Boundary normalized inductor time constant χ Normalized inductor time constant

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Section: Nomenclature S 1 S 2 and S 3 Active Switches R S1(on ) mentioning

confidence: 99%

High Gain Transformer-Less Double-Duty-Triple-Mode DC/DC Converter for DC Microgrid

et al. 2019

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“…Therefore, many transformer-based and transformer-less topologies have been proposed over the past few years to achieve a sufficiently high gain at lower values of the duty ratio [2,[7][8][9][10][11]. However, if an industrial application does not demand for dc isolation, the use of transformer-based isolated dc-dc converters would only increase the overall cost and size of the system [2].…”

Section: Background and Motivationmentioning

confidence: 99%

“…Also, the efficiency degrades due to the losses associated with the secondary winding of the transformer. This makes transformer-less topologies a more interesting choice and to date, a number of such topologies has been reported in the relevant literature [2,[8][9][10][11]. The main objective of thesis is to study the various modeling and control related aspects of such high-order boost-type dc-dc converters.…”

Section: Background and Motivationmentioning

confidence: 99%

“…Apart from this, the use of a transformers may lead to electromagnetic interference (EMI) generation problems, increases the switching losses and also increases the size, cost, and volume of the overall converter system [2,9]. This makes transformerless topologies a more interesting choice and to date, a number of such topologies have been reported in the relevant literature [2,[8][9][10][11]. A brief overview of some of the state-of-the-art non-isolated high-order dc-dc boost converters is provided next.…”

Section: Review Of the State-of-the-art High-order Dc-dc Boost Convermentioning

confidence: 99%

“…Applying the generalized state-space averaging technique [10] to (5.1) - (5.8) yields the following generalized averaged state-space model of the converter given by:…”

Section: Averaged State-space Model Of the Convertermentioning

confidence: 99%

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Modeling, analysis and control of high-order switching power converters

Chincholkar¹

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LIST OF ACRONYMS vii CHAPTER 1 INTRODUCTION 1 1.1 Background and Motivation 1 1.2 Objectives of This Research Work 6 1.3 Contributions of the Thesis 7 1.4 Organization of This Thesis 7 CHAPTER 2 LITERATURE REVIEW 2.1 Review of the State-of-the-art High-order Dc-Dc Boost Converter Topologies 2.2 Modeling of High-order Boost-type Dc-Dc Converters 2.2.1 Overview of the State-Space Averaging Method 2.2.2 Averaged Model of the Hybrid-Boost Converter 2.2.3 Averaged Model of the 2-stage Cascade Boost Converter 2.3 State-of-the-art Controllers for High-Order Dc-Dc Boost Converters 2.3.1 Current-Mode Controller 2.3.2 Sliding-Mode Controllers 2.3.3 The Output Feedback Controller 2.4 Summary CHAPTER 3 COMPARATIVE STUDY OF FIXED CURRENT-MODE CONTROLLERS FOR HIGH-ORDER DC-DC CONVERTERS iii 3.1 Motivation 3.2 A Comparative Study of Current-mode Controllers for the Positive Output Elementary Luo (POEL) Converter 3.2.1 Comparison Using State-Space Approach 3.2.2 Comparison Using Frequency-Response Approach 3.3 A Comparative Study of Current-mode Controllers for the 2-Stage Cascade Boost Converter 3.3.1 Controller Design Using Root-locus Method 3.3.2 Controller design using classical frequency-domain approach 3.4 Experimental Results 3.4.1 Current-mode Controlled POEL Converter 3.4.2 Current-mode controlled 2-stage cascade boost converter 3.5 Summary CHAPTER 4 SLIDING-MODE CONTROL OF HIGH-ORDER DC-DC CONVERTERS 4.1 Motivation 4.2 Design of Fixed-frequency Pulse-width-modulation (PWM)-Based SM Controllers for the Quadratic Boost Converter 4.2.1 Design of PWM-based SM Controller Using Inputinductor Current 4.2.2 Design of PWM-based SM Controller Using Outputinductor Current 4.3 A Comparative Study of Hysteresis-Modulation (HM)-Based SM Controllers for the Hybrid-type dc-dc Boost Converter 4.3.1 Design of HM-based SM Controller Using Outputinductor Current 4.3.2 Design of HM-based SM Controller Using Inputinductor Current 4.4 Simulation and Experimental Results 4.4.1 Implementation of the PWM-based SM controller for the quadratic boost converter iv 4.4.2 HM-based SM for the hybrid boost converter 4.5 Summary CHAPTER 5 MODELING AND ADAPTIVE CURRENT-MODE CONTROL OF A HIGH STEP-UP DC-DC CONVERTER 5.1 Modeling of a High Step-up dc-dc Converter 5.1.1 Averaged State-space Model of the Converter 5.

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Single switch quasi Z‐source based high voltage gain DC‐DC converter

Padmavathi

Natarajan

2020

Int Trans Electr Energ Syst

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Multiloop Controller for N-Stage Cascade Boost Converter

Cited by 14 publications

References 10 publications

High Gain Transformer-Less Double-Duty-Triple-Mode DC/DC Converter for DC Microgrid

High Gain Transformer-Less Double-Duty-Triple-Mode DC/DC Converter for DC Microgrid

Modeling, analysis and control of high-order switching power converters

Single switch quasi Z‐source based high voltage gain DC‐DC converter

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