Digital power-factor correction for a capacitor-charging power supply

Newsom, R.L.; Dillard, W.C.; Nelms, R.M.

doi:10.1109/tie.2002.803240

Cited by 29 publications

(14 citation statements)

References 5 publications

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“…Regarding the controllers proposed in the literature for battery charging systems that use flyback converters, most of the papers use linear controllers, while others use specialized controllers (like peak current control [21,34] or fuzzy controller [23]) or do not include a control structure [22,29,[31][32][33]35]. A cascade controller is used in [24][25][26], where the outer loop is a PI controller to regulate v b , and the inner loop is a PI that tracks a reference of the battery current (i b ).…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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Devices connected to microgrids require safe conditions during their connection, disconnection and operation. The required safety is achieved through the design and control of the converters that interface elements with the microgrid. Therefore, the design of both power and control stages of a battery charger/discharger based on a flyback is proposed in this paper. First, the structure of a battery charger/discharger is proposed, including the battery, the flyback, the DC bus, and the control scheme. Then, three models to represent the battery charger/discharger are developed in this work; a switched model, an averaged model, and a steady-state model, which are used to obtain the static and dynamic behavior of the system, and also to obtain the design equations. Based on those models, a sliding-mode controller is designed, which includes the adaptive calculation of one parameter. Subsequently, a procedure to select the flyback HFT, the output capacitor, and the Kv parameter based on operation requirements of the battery charger/discharger is presented in detail. Five tests developed in PSIM demonstrate the global stability of the system, the correct design of the circuit and controller parameters, the satisfactory regulation of the bus voltage, and the correct operation of the system for charge, discharge and stand-by conditions. Furthermore, a contrast with a classical PI structure confirms the performance of the proposed sliding-mode controller.

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Section: Introductionmentioning

confidence: 99%

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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“…To reduce the input current harmonic pollution and improve the stability of power grid, power factor correction (PFC) converters have been widely used in the switching power converter systems [1]. Meanwhile, owing to the advantages such as improved flexibility and increased functionality offered by digital controller, digital control implementation has received more and more attention in the research of PFC system [2].As shown in Fig.1, the digital controller of digital PFC converter mainly includes three parts: analog-to-digital converter (ADC), digital compensator and digital pulse width modulator (DPWM).…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of the optimized digital controller with the simplified control algorithm for boost power factor correction converter

Sun

Yao

et al. 2018

IEICE Electron. Express

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Abstract:The design and implementation of a digital controller for a boost power factor correction (PFC) converter under continuous current mode is presented to reduce the harmonic distortion. Based on the circuit structure of boost PFC converter, the total digital control loop is simply implemented to improve the power factor of converter and reduce the calculation burden of digital controller. Meanwhile, the optimized digital pulse width modulator (DPWM) is adopted to improve the regulation performance of digital controller. The boost PFC converter with the proposed digital contrller has been implemented via the FPGA platform, and experimental results indicate that the digital PFC converter with the proposed digital controller can aim high regulation linearity, power factor and output stability.

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“…The available literature reports the used of controlled charging of capacitor to produce pulse power, where a capacitor is charged for a longer duration and the energy (in the capacitor) is discharged quickly to a load when required (Lippincott and Nelms, 1991;Nelms and Schatz, 1992;Newsom et al, 2002). Note that such algorithm is not suitable to realise a sinusoidal power supply.…”

Section: Introductionmentioning

confidence: 99%

Design simulation and experimental evaluation of a three-phase controlled capacitor charging type inverter

Dalapati

Chakraborty

2010

IJPELEC

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This paper presents the design, simulation and experimental verification of a new three-phase pulse width modulated inverter. The inverter works on the principle of controlled capacitor charging, where a capacitor that is connected across the load is charged or discharged in a controlled manner to synthesise a desired waveform. The input to the inverter being a voltage source, an inductor is used in series with the capacitor to limit the charging/discharging current. High frequency pulses are used to fabricate the waveform and also to reduce the size of the inductor. A controller, taking a sinusoidal reference voltage signal and operating on a unique tracking logic, controls the switches in discontinuous conduction mode. The capacitor-voltage at the output and the inductor-current are fed-back to the controller. The inverter is able to track the reference-voltage satisfactorily to synthesise the output-voltage. The proposed inverter is first simulated in PSPICE. An experimental prototype is also fabricated in the laboratory. Excellent correlation of the simulation and experimental waveforms confirm the usefulness of the proposed inverter.

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Digital power-factor correction for a capacitor-charging power supply

Cited by 29 publications

References 5 publications

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

Design and implementation of the optimized digital controller with the simplified control algorithm for boost power factor correction converter

Design simulation and experimental evaluation of a three-phase controlled capacitor charging type inverter

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