Buck or Boost Tracking Power Converter

Midya, P.; Haddad, Kamal Al; Miller, M.

doi:10.1109/lpel.2004.840739

Cited by 72 publications

(35 citation statements)

References 5 publications

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“…The cascaded buck-boost converter with two switches, known as the non-inverting buck-boost converter, has been used to regulate the variable input voltage and have non polarity inversion at the output with regards to the input voltage [42,49,50,51,52,53,54,55,56]. This structure generates the direct path for the power ow from the input to the converter, and the losses at the inductor are at a minimum [43,49].…”

Section: Dc-dc Converter As Power Conditioning In Energy Conversionmentioning

confidence: 99%

“…All of these use input feedback current. The voltage control can be achieved by separating the operation mode of the cascaded buck-boost converter, so that for half of the time it operates as a buck converter and for the other half of the time as a boost converter by using logic sequences [53,52].…”

Section: Dc-dc Converter As Power Conditioning In Energy Conversionmentioning

confidence: 99%

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Energy recovery from landing aircraft

Zulkifli¹

2012

2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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Currently, renewable energy sources are the main driver for future electricity generation. This trend is growing faster in the developed countries in order to reduce the green house e ect and also in response to the limited supply of oil, gas and coal which are currently the major sources for electric generation. For example, the main renewable energy sources are from wind energy and solar energy but these energies are only available to those countries that are exposed to these resources. In this thesis an alternative energy source is investigated where it can be generated from the moving objects or in form of kinetic energy. The idea is to convert the kinetic energy during landing aircraft into electrical energy which it can also be stored and transferred to the existing electrical network. To convert this kinetic energy to electrical energy, the linear generator (LG) and uncontrolled recti er have been used for energy conversion. The LG have been modelled in 3-phase model or in dq model and combined with the diode recti er that is used to generate the dc signal outputs. Due to the uncontrolled recti er the electrical outputs will have decaying amplitude along the landing time. This condition also happen to the LG outputs such as the force and the power output. In order to control these outputs the cascaded buck-boost converter has been used. This converter is responsible to control the output current at the recti er and also the LG output power during landing to more controllable power output. Here, the H ∞ current control strategy has been used as it o ers a very good performance for current tracking and to increase the robustness of the controller. During landing huge power is produced at the beginning and when the landing time is increased, the generated input power from LG is reduced to zero. Due to this, the energy storage that consits of ultracapacitor, bidirectional converter and boost converter are usedin order to store and to release the energy depends on the input power source and load grid power. The voltage proportional-integral (PI) control strategy has been used for both the converters. The last part is to transfer the energy from the source and at the ultracapacitor to the load by using the inverter as the processing device. The power controller and current controller are used at the inverter in order to control the power ow between the inverter and the grid. This is when the reference power is determined from the load power in order to generate the reference current by using the voltage oriented controller (VOC), while the H ∞ current controller is used to regulate the inverter current in order to inject the suitable amount of current that refer to the load power. Finally, a complete energy recovery system for landing aircraft with the grid connection have been put together to make the whole system to be as a new renewable energy source for the future electricity generation.

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Section: Dc-dc Converter As Power Conditioning In Energy Conversionmentioning

confidence: 99%

Section: Dc-dc Converter As Power Conditioning In Energy Conversionmentioning

confidence: 99%

Energy recovery from landing aircraft

Zulkifli¹

2012

2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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“…7 shows our simulated data for a N=12 OFDM system, indicating most of the signal energy is confined within a bandwidth of 7MHz. To meet the stringent requirements for high PAE, high bandwidth, and high slew rate with low ripples and large current handling capability, many approaches have been reported for the envelope amplifier design, including buck converters using pulse-width modulation (PWM) and delta-sigma modulation [26][27][28], multiphase converters [29], cascade of buck and boost converters [30], linearassisted switched-mode converters [31][32], etc. We will show a promising linear-assisted switched-mode converter using split-band design in Fig.…”

Section: Design Of Envelope Amplifiers For Et-based Polar Transmimentioning

confidence: 99%

Design of highly-efficient wideband RF polar transmitters using the Envelope-Tracking technique

Lie

Lopez

2008

2008 IEEE Bipolar/BiCMOS Circuits and Technology Meeting

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This paper discusses the design issues of highly efficient and monolithic wideband RF polar transmitters, especially the ones that use the EnvelopeTracking (ET) technique. Besides reviewing the stateof-the-art polar transmitters in the literature, three focus topics will be discussed: (1) the system-on-achip (SoC) design considerations of the monolithic polar transmitter using ET; and (2) the design of highly-efficient envelope amplifier capable of achieving the high efficiency, current, bandwidth, accuracy and noise specifications required for wideband signals; and (3) the design of highefficiency monolithic Si-based power amplifiers (PAs) suitable for ET-based RF polar transmitters.

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“…One of the key difficulties in control of non-inverting buck-boost topology is the smooth transition from buck to boost operation or boost to buck operation. The easiest way to mitigate this problem is to compare the magnitudes of input and output voltages [10,11]. In this way, the voltage drops in the components, which vary with load current, must be taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

A Compensation Technique for Smooth Transitions in Non-inverting Buck-Boost Converter

Lee

Khaligh

Emadi

2009

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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With the advent of battery-powered portable devices and the mandatory adoptions of power factor correction (PFC), non-inverting buck-boost converter is attracting numerous attentions. Conventional two-switch or four-switch non-inverting buck-boost converters choose their operation modes by measuring input and output voltage magnitudes. This can cause higher output voltage transients when input and output are close to each other. For the mode selection, the comparison of input and output voltage magnitudes is not enough due to the voltage drops raised by the parasitic components. In addition, the difference in the minimum and maximum effective duty cycle between controller output and switching device yields the discontinuity at the instant of mode change. Moreover, the different properties of output voltage versus a given duty cycle of buck and boost operating modes contribute to the output voltage transients. In this paper, the effect of the discontinuity due to the effective duty cycle derived from device switching time at the mode change is analyzed. A technique to compensate the output voltage transient due to this discontinuity is proposed. In order to attain additional mitigation of output transients and linear input/output voltage characteristic in buck and boost modes, the linearization of DC-gain of large signal model in boost operation is analyzed as well. Analytical, simulation, and experimental results are presented to validate the proposed theory.

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Buck or Boost Tracking Power Converter

Cited by 72 publications

References 5 publications

Energy recovery from landing aircraft

Energy recovery from landing aircraft

Design of highly-efficient wideband RF polar transmitters using the Envelope-Tracking technique

A Compensation Technique for Smooth Transitions in Non-inverting Buck-Boost Converter

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