Design of Digital Control System for DC/DC Converter of On-Board Charger

Tao, Haijun; Zhang, Guopeng; Zhang, Zheng; Du, Changshun

doi:10.1155/2019/2467307

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…However, when the duty cycle of the PWM rises above 50%, the current-mode architecture can become unstable [38]. The converter primary current slope compensation technique is used to mitigate this instability and restore stability across a large duty-cycle range [39,40].…”

Section: Control Circuit Implementation Of the Phase-shift Pwm Zvs Dc...mentioning

confidence: 99%

Design and Fabrication of an Isolated Two-Stage AC–DC Power Supply with a 99.50% PF and ZVS for High-Power Density Industrial Applications

Okilly

Baek

2022

Electronics

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Power quality in terms of power factor (PF), efficiency, and total harmonic distortions (THDs) is an important consideration in power supplies designed for 5G telecom servers. This paper presents a different magnetic parts design and manufacturing techniques of power supplies, design and selection criteria of switching elements as well as the optimal design of control loops based on small-signal stability modeling and an appropriate stability criterion. The designed telecom power supply consists of the power factor correction (PFC) stage to increase the input power factor and the isolated phase-shift pulse width modulation (PWM) zero-voltage switching (ZVS) DC–DC converter stage to regulate the supply voltage to the specified load value while maintaining a high conversion efficiency. A two-stage outdoor telecom power supply with a power rating of 2 kW was designed and fabricated on a printed circuit board (PCB). The distinct two-stage power components of the power supply were subjected to loss analysis. Furthermore, PSIM simulation and experiments were used to demonstrate the total harmonic distortions (THDs), voltage ripples, power efficiency, and PF performance of the supply current for the proposed power supply under various operating situations. This work produces an industrial high power density power supply with a high PF, low THD and high conversion efficiency which is suitable for telecom power server applications.

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Section: Control Circuit Implementation Of the Phase-shift Pwm Zvs Dc...mentioning

confidence: 99%

Design and Fabrication of an Isolated Two-Stage AC–DC Power Supply with a 99.50% PF and ZVS for High-Power Density Industrial Applications

Okilly

Baek

2022

Electronics

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“…However, the current-mode design can suffer from instability when the duty cycle of the PWM rises above 50% [45]. To overcome this instability, converter primary current slope compensation technique is used to restore reliability over the wide range of duty-cycle [19,46]. Figure 8 shows the schematic of control technique of DC-DC converter, implemented in PSIM software where the primary current and the output voltage are the feedback signals used in this control system.…”

Section: Dc-dc Converter Controller Design and Implmentationmentioning

confidence: 99%

“…DC-DC converter control circuits can be implemented using analog or digital control circuits, but analog control chip as compared with digital micro controller unit (MCU) has some demerits such as the temperature drift, fixed control parameters, and slow response speed; on the other hand the price of the MCU and the required analog digital interfacing sensors are expensive as compared with the analog control technique requirement. Optimization analysis and the design of different control techniques for the DC-DC converter have been previously presented in [17][18][19][20][21]. Design of 1 kW efficient phase shift telecom DC-DC converter based on the maximum duty cycle and optimal hold-up time is given in [22].…”

Section: Introductionmentioning

confidence: 99%

Inrush Current Control of High Power Density DC–DC Converter

Okilly

Kim²,

Baek

2020

Energies

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This paper presents a complete mathematical design of the main components of 2 kW, 54 direct current (DC)–DC converter stage, which can be used as the second stage of the two stages of alternating current (AC)–DC telecom power supply. In this paper, a simple inrush current controlling circuit to eliminate the high inrush current, which is generated due to high input capacitor at the input side of the DC–DC converter, is proposed, designed, and briefly discussed. The proposed circuit is very easy to implement in the lab using a single metal–oxide–semiconductor field-effect transistor (MOSFET) switch and some small passive elements. PSIM simulation has been used to test the power supply performance using the value of the designed components. Furthermore, the experimental setup of the designed power supply with inrush current control is built in the lab to show the practical performance of the designed power supply and to test the reliability of the proposed inrush current mitigation circuit to eliminate the high inrush current at initial power application to the power supply circuit. DC–DC power supply with phase shift zero voltage switching (ZVS) technique is chosen and designed due to its availability to achieve ZVS over the full load range at the primary side of the power supply, which reduces switching losses and offers high conversion efficiency. High power density DC–DC converter stage with smooth current startup operation, full load efficiency over 95%, and better voltage regulation is achieved in this work.

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Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

2021

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The rise of green technologies in transportation requires electric vehicles (EV) as a prominent solution for reducing greenhouse gas emissions. An off‐grid EV charging station plays a significant role in remote regions leading to increased use of EVs. Solar energy promises to be the best solution due to its abundance and simple installation. As solar energy is not constant over a 24‐hour period, there is a need for an energy storage unit (ESU) along with a photovoltaic array. In this paper, we present an efficient design approach that uses a fast‐charging station with a maximum power point tracking boost converter, a bidirectional DC‐DC converter with a snubber circuit, and ESU. The power electronic converters with an active snubber and two capacitive‐diode snubbers act as the energy sources that interface with the ESU. The snubber circuits achieve near zero voltage switching and zero current switching for the converter, thus improving overall efficiency. ESU meets the energy demand for EVs when there is insufficient generated solar energy. On the other hand, during the excess generation of solar energy, ESU utilizes this energy to develop an optimal power management system. This results in a green, reliable, and efficient off‐grid EV charging station. The proposed method is validated using the MATLAB/Simulink environment to verify system performance.

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Design of Digital Control System for DC/DC Converter of On-Board Charger

Cited by 4 publications

References 9 publications

Design and Fabrication of an Isolated Two-Stage AC–DC Power Supply with a 99.50% PF and ZVS for High-Power Density Industrial Applications

Design and Fabrication of an Isolated Two-Stage AC–DC Power Supply with a 99.50% PF and ZVS for High-Power Density Industrial Applications

Inrush Current Control of High Power Density DC–DC Converter

Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

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