Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In this paper, implementation of a virtual resistance controller for DC-DC boost converter Dahono 1 to improve the damping during transient response is proposed. The virtual resistance is developed by using pole placement and root locus techniques to obtain the desired transient response for the converter. The model that considering component non-idealities then established. In order to verify the...
This paper presents the design of a digital controller for a 600 W Boundary-Conduction-Mode (BCM) interleaved boost converter used in an ac-dc Power-Factor-Correction (PFC) power supply. The output voltage of a typical boost PFC rectifier contains a 2nd harmonic ripple. Therefore to achieve good power factor, the output voltage compensator must have a low bandwidth, in order to sufficiently attenuate...
The stacking MOSFET structure composed of low-voltage devices suffers from deteriorated transient response or large footprint area when capacitor-free or dominant pole compensation low dropout (LDO) regulator biases the driver. Due to self-stabilized feature, the proposed stacking MOSFET driving (SMD) technique effectively drives the power stage and greatly reduces noise interference from the noisy...
The solar (PV) energy as one of the renewable natural energy has been widely used as an environment friendly resources, however the intensity of incoming sun-light as the source of the power, is not always the same all the time during the day, which makes the output voltage becomes unstable. The sun light intensity can be influenced by various factors such as the cloudy or sunny weather, which causes...
This paper proposes a new control strategy technique called voltage-mode variable frequency (VMVF) control for single-inductor dual-output (SIDO) switching converter to achieve fast transient response and small output cross-regulation. A SIDO buck converter operating in continuous conduction mode (CCM) is taken as an example to analyse the operation modals with different equivalent series resistances...
DC microgrids (MGs) have many potential advantages compared with AC microgrids, which have attracted more and more attention in recent years. However, DC bus voltage control of these systems can be an important issue undergoing the power surplus or deficit. An energy buffer in the DC MG powered by the bidirectional DC/DC converter with energy storage systems (ESS) such as super capacitor were investigated...
Advanced CMOS devices below 28nm allow supply voltages lower than 1V. For applications with higher input voltage in such devices, stacked MOSFET structures with a three-level technology are commonly employed. The stacked structure can also reduce the output voltage ripple substantially. Figure 10.5.1 shows a three-level single-inductor triple-output (SITO) converter and also compares the transient...
We propose an output error-driven random controlled Single Inductor Multiple Output (SIMO) buck/boost DC-DC converter operated in the Continuous Conduction Mode (CCM). Random selection of output switches based on maximum instantaneous output error enables us a novel control scheme which leads to a fast transient response with mitigating the cross-regulation problem of buck-boost converters. A freewheeling...
In this paper, a method is presented to improve the transient response of a buck converter. This method is based on using dual-loop voltage-mode controller along with a segmented power transistor stage. The first control loop is a conventional voltage-mode feedback using a second order delta-sigma as the control block. The second loop controls the size of the switches during the transient time. Simulation...
As power-dissipation remains a roadblock to maintaining growth in computational performance, the trend toward increasingly aggressive reliance on Dynamic Voltage and Frequency Scaling (DVFS) by power power management systems, and Integrated Voltage Regulation (IVR) in particular, will continue. As voltage domains continue to shrink, and an increasing number of Voltage Regulators (VRs) are employed...
Since parabolic current control has fast transient response and high control precision with constant switching frequency, it is an attractive current control strategy for voltage source inverters. The employment of parabolic current control delivers great performance on current waveform control or voltage waveform control. The implementation of parabolic current control usually requires high speed...
This paper presents a 2-phase interleaved buck converter which both has current balance and phase shedding control. These methods have been incorporated into high current multiphase converters in the past. But in this paper, it operates under low current situation which meets the portable device specification. A voltage mode digital controller in FPGA implementation is described. Experimental results...
Constant-on-time (COT) control with an additional current feedback in conventional buck converter has the advantage of using low equivalent series resistance (ESR) output capacitor. Unfortunately, the disadvantage is output voltage regulation accuracy is greatly deteriorated by its DC offset voltage from the current feedback. More seriously, opposite reaction between output voltage and the additional...
This paper presents a method to analyze the dynamic physical limits of a phase-shifted full bridge (PSFB) circuit used for the power supply of Magnetic Resonance Imaging (MRI) gradient amplifiers. Based on the time-optimal control theory, the detailed optimal transient response process under a sudden load current change is analyzed considering the sample time delay, the minimum voltage undershoot...
This paper proposes a single inductor dual output (SIDO) buck converter with a load dependent controller to achieve high conversion efficiency, fast transient response, and small cross-regulation, which is suitable for power management applications. The switching frequency is adjusted according to the load condition by the proposed current integrator, thus the converter can provide sufficient energy...
In this paper, a reference modification method for the PID control is studied to improve the transient response of the output voltage of the power converter using weighted prediction information with a neural network predictor. Several predictions of the output voltage with the neural network are used to obtain the modified reference value in the PID control by minimizing the objective function. The...
In this paper, author proposes study of two-loop voltage mode controlled (TVMC) buck converter for improved transient and dynamic performance under line and load disturbances. Buck converter with voltage mode control will improve efficiency, but transient response is sluggish. It requires large filter capacitor. Two-loop voltage control technique is proposed to improve output voltage regulation irrespective...
This paper investigates the physical issues affecting the load transient response both from the power-stage-component-selection and control-design point of views. A conventional buck converter under three different control schemes - direct-duty-ratio control, peak-current control and peak-current-control with load-current-feedforward control - is used as an example. The outcomes of the investigation...
This paper presents a fully integrated, four-phase, DC-DC switching converter with fast transient response. By applying effective clock and phase synchronization schemes to a current-mode hysteretic control, the multiphase converter achieves ripple cancellation and fast transient response seamlessly. Thanks to the very high frequency (VHF) operation (200 MHz) and the multiphase interleaving topology,...
V2 control is a popular control architecture in point-of-load Buck converters due to its simplicity and fast transient response. V2 control with ceramic capacitor has instability issue. This paper reviews the existing solutions and their limitations are studied. A solution using output capacitor current ramp to stabilize the control loop is proposed. The analog capacitor current sensing method based...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.