Techniques of Dual-Path Error Amplifier and Capacitor Multiplier for On-Chip Compensation and Soft-Start Function

Liu, Pang-Jung; Hsu, Chen‐Chin; Chang, Yi-Hsiang

doi:10.1109/tpel.2014.2320282

Cited by 29 publications

(9 citation statements)

References 20 publications

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“…1. The voltage voltage-source type three-phase bridge converter circuit is composed of IGBTs installed in parallel on the load side through series reactors, and the dynamic compensation of reactive power could be realized according to the actual load [14][15] . Its principle can be illustrated by the single-phase equivalent circuit and vector diagram, which are shown in Fig.…”

Section: Topology and Principle Of Svgmentioning

confidence: 99%

A novel soft-start method for SVG based on D-axis orientation

Zheng

Shu

et al. 2021

Chin. J. Electr. Eng.

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In this paper, a novel method for shock-free soft-start is proposed. The novel method can realize the aim of no-overshoot and inrush of current during the entire soft-start process, thus the start process is safe, stable, and reliable. When the uncontrolled rectification stage ends, a sinusoidal signal synchronized with the grid voltage is generated through dq coordinate transformation and D-axis orientation, then the signal is transmitted to the three-phase inverter bridge. The AC voltage output of the inverter bridge is superimposed on both ends of the soft-start resistor along with the grid. The open-loop control method is adopted to gradually reduce the modulation ratio of the sinusoidal PWM wave until the capacitor voltage on the DC side reaches the rated voltage value, then the soft-start resistor is removed, which means the shock-free soft-start process is completed. Experimental results prove the effectiveness and feasibility of the control strategy proposed in this paper.

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Section: Topology and Principle Of Svgmentioning

confidence: 99%

A novel soft-start method for SVG based on D-axis orientation

Zheng

Shu

et al. 2021

Chin. J. Electr. Eng.

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“…As a result, the design achieves the required regulation in steady-state but the robustness of the system parameters is compromised. Furthermore, the system start-up usually needs to be controlled with soft-start algorithms [7], or by adding specific circuitry [8], [9] or by changing the power stage [10].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Terminal and Conventional Sliding-Mode Startup Peak Current Controls for a Synchronous Buck Converter

Repecho

Masclans

Biel

2021

IEEE J. Emerg. Sel. Topics Power Electron.

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An alternative to the linear control techniques, which are based on small signal averaged models, is the sliding mode control. That method uses instantaneous models of the switched power converter to design robust controllers. The large signal modelling allows not only to control the system behaviour around the steady-state, but also the start-up transient. This paper presents the design of two sliding mode controllers that regulate the output voltage of a synchronous buck converter and limit the start-up peak current. A terminal sliding mode control is designed and compared with a first order sliding mode control, which is called here as a conventional sliding mode control. The study shows that the terminal sliding mode control presents lower transient time to reach the final value as compared to the conventional one because of its finite time convergence property. It also achieves better performance in terms of line and load regulation. A power converter prototype of 150 W / 100 kHz is assembled and both sliding mode controllers are digitalized and implemented in a microcontroller. Numerical simulations and experimental results validate the proposal. Index Terms-Sliding mode control, terminal dynamics, synchronous buck converter.

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“…This can be designed especially for double source applications, where an inverse inductor current must be avoided. The soft start function uses subtractive type and time average capacitor multipliers has been described in [28]. This subtractive type soft-start helped much to relax the restrictions of the capacitance and the charging current.…”

Section: Introductionmentioning

confidence: 99%

Digital Soft Start Implementation for Minimizing Start Up Transients in High Power DAB-IBDC Converter

et al. 2018

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Abstract:The dual active bridge isolated bidirectional DC-DC converter (DAB-IBDC) is one of the prime converters used in dual active bridge renewable energy storage system (RESS) applications, particularly where a high-power density is required. The digital DSP (Digital Signal Processer) control technique also provides intelligence to applications and achieves a super compact elegant system by reducing the complicated control hardware. All power converters, including the DAB-IBDC converter, often draw an inrush current, which is many times higher than their steady state current. The inrush current is the maximum current drawn by a converter for a very few milliseconds while being freshly energized. Although it appears for only a very few milliseconds, it can cause severe damage to the entire energy storage system, including the sources and loads. To save the RESS system from the starting inrush current and peak overshoot voltages, this paper proposes a five-phase digital soft-start control algorithm for a high-power DAB-IBDC converter that was implemented at a renewable energy storage system aimed at developing an intelligent self-powered energy zone. The proposed five phase digital soft-start algorithm can alone solve the startup transients without the use of any additional hardware. First, it prevents the output current and voltages from transients, such as the inrush current and peak overshoot voltages, by ensuring that the output current does not increase too rapidly while starting up. Second, it also eliminates the large backflow inrush current released by a partially discharged energy storage device at the starting period. Third, it helps achieve a simple super compact size DAB-IBDC converter with a simple elegant design by ensuring the control and soft-start in digital technology.

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Techniques of Dual-Path Error Amplifier and Capacitor Multiplier for On-Chip Compensation and Soft-Start Function

Cited by 29 publications

References 20 publications

A novel soft-start method for SVG based on D-axis orientation

A novel soft-start method for SVG based on D-axis orientation

A Comparative Study of Terminal and Conventional Sliding-Mode Startup Peak Current Controls for a Synchronous Buck Converter

Digital Soft Start Implementation for Minimizing Start Up Transients in High Power DAB-IBDC Converter

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