Topological constraints on basic PWM converters

Liu, K.-H.; Lee, F.C.

doi:10.1109/pesc.1988.18130

Cited by 82 publications

(21 citation statements)

References 2 publications

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“…Although the splitting of the reactive components does not make any change from the differential-mode behavior viewpoint, it is 0093-9994/02$17.00 © 2002 IEEE expected to have a common-mode electromagnetic interference (EMI) suppression effect because of their symmetrical structure. It may be noted that the Ć uk-based bidirectional dc-dc converter appears to be a Ć uk converter from both sides but the SEPIC-based bidirectional dc-dc converter is seen to be a SEPIC only from the left side and appears as a Zeta [19] from the right side. These bidirectional dc-dc converters can be made ac-dc converters by replacing their active switch/diode pair on the left side with a three-phase VSC bridge as shown at the bottom of the figures.…”

Section: Power Stage Topologiesmentioning

confidence: 99%

Three-phase PWM boost-buck rectifiers with power-regenerating capability

Kikuchi

Lipo

2002

IEEE Trans. on Ind. Applicat.

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Abstract-Three-phase pulsewidth-modulated (PWM) boost-buck rectifiers with power-regenerating capability are investigated. The converters under consideration are capable of: 1) both voltage step-up and step-down; 2) bidirectional power processing; and 3) almost unity-power-factor operation with nearly sinusoidal ac current. Expected advantages are: 1) applicability to lower voltage applications, e.g., direct retrofit to replace diode or thyristor rectifiers; 2) switching loss reduction in the inverter load; 3) low-order harmonic control in the inverter load output voltage; 4) blanking time effect mitigation in the inverter load; and 5) a modest level of voltage sag/swell compensation. In this paper, firstly, a step-by-step power stage derivation process is described. Then, taking the Ć uk-Ć uk realization as an example, its operating principle and modulation scheme are described. A steady-state model and dynamic model for controller design are also described. Representative results of circuit simulations and hardware experiments are presented. Through these procedures, the feasibility of the presented three-phase PWM boost-buck rectifier with power-regenerating capability is demonstrated.

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Section: Power Stage Topologiesmentioning

confidence: 99%

Three-phase PWM boost-buck rectifiers with power-regenerating capability

Kikuchi

Lipo

2002

IEEE Trans. on Ind. Applicat.

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“…Although the transformer plus split-capacitor buffering approach is commonly used to isolate the Cuk converter output, its possible use on the sepic and zeta converters [24] has been virtually unexploited, with the coupled magnetic circuit with flux bias replacement of an inductor approach favored for these two converters, as in Figure 1. Both references [23] and [24] (c.f. Figure 11(b)) preclude the proposed new buck-boost topology P5, considered as being degenerate.…”

Section: Transformer Isolated Buck-boost Convertersmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

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-Of the single-switch dc-to-dc converters, those with the buck-boost voltage transfer function offer the best potential for transformer coupling, hence isolation, at the kilowatt level. This paper highlights the limitations of the traditional magnetic coupled, buck-boost topology. Then four split-capacitor transformer-coupled topologies (specifically the Cuk, sepic, zeta, and new converters) with a common ac equivalent circuit, that do not temporarily store core magnetic energy as does the traditional isolated buckboost converter nor have a core dc magnetizing current bias as with the sepic and zeta transformer coupled topologies, are explored. Core dc bias capacitive voltage compensation is a practical design constraint in three of the four topologies, while all four must cater for stray and leakage inductance effects. Simulations and experimental results for the new converter at 408W that support the transformercoupled, single-switch dc-to-dc converter concepts are investigated.

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“…One of the switch terminals is connected to the pole and the other switches from one to other of the throw terminals, Fig 1(a). As the current flowing through an inductor or a current source must always have a path to flow (Liu and Lee, 1988), it has to be connected to the pole of the switch. On the other hand, a capacitor or a voltage source must never be shorted, hence, it may not be connected between the pole and other terminal (Liu and Lee, 1988).…”

Section: Zvt Pwm Converters Mechanismmentioning

confidence: 99%

“…As the current flowing through an inductor or a current source must always have a path to flow (Liu and Lee, 1988), it has to be connected to the pole of the switch. On the other hand, a capacitor or a voltage source must never be shorted, hence, it may not be connected between the pole and other terminal (Liu and Lee, 1988). This way, the energy storage elements, represented by a current and a voltage source, I and V, respectively, are placed as shown Fig 1(b).…”

Section: Zvt Pwm Converters Mechanismmentioning

confidence: 99%

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A classification methodology for zero-voltage transition PWM converters

Martins

Russi

Hey

2005

Sba Controle & Automação

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This paper presents a classification methodology of the ZVT soft-transition technique, which is based on different ways of implementation of the auxiliary circuit voltage source. The merits and limitations of each class are presented and their key features and characteristics are discussed and experimentally analyzed on the 1kW/100kHz laboratory prototypes. By means of the proposed classification criteria, any ZVT topology can be classified, even the unpublished ones. Additionally, an overview of the main ZVT PWM converters proposed in the last decades is also presented.

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Topological constraints on basic PWM converters

Cited by 82 publications

References 2 publications

Three-phase PWM boost-buck rectifiers with power-regenerating capability

Three-phase PWM boost-buck rectifiers with power-regenerating capability

Transformer Isolated Buck-Boost Converters

A classification methodology for zero-voltage transition PWM converters

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