Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor

Shin, Hojoon; Chae, Young-Ho; Son, Yeongrack; Ha, Jung‐Ik

doi:10.1109/tpel.2016.2540633

Cited by 42 publications

(8 citation statements)

References 25 publications

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“…This bidirectional converter is the only power path between the decoupling capacitor and the original motor drive circuit, which simplifies the structure of APDCs and makes power decoupling easy to implement. In addition, this type APDCs can significantly increase the minimum DC‐link voltage and expand the motor speed range [11]. However, the DC‐link capacitor of this type APDCs is directly connected to the output of the rectifier.…”

Section: Introductionmentioning

confidence: 99%

Single‐phase small capacitor motor drive system with high‐efficiency buck active power decoupling converter

Zhang

Zhu

et al. 2022

IET Power Electronics

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This paper proposes a novel active power decoupling circuit (APDC) based on modified Buck converter to reduce the DC‐link voltage ripple of small capacitor motor drive systems. The APDC is placed between the Boost PFC circuit and the DC‐link, and has two energy flow paths, and the sum of the power decoupling capacitor and the DC‐link capacitor voltage equals to the output voltage of the Boost converter. With these configurations, the voltage of the decoupling capacitor can be precisely controlled to be the same as the AC component of the output voltage of the Boost converter, thereby effectively reducing the DC‐link voltage ripple. Another unique feature of the proposed APDC is that the inductor works in discontinuous current mode and only work for half of the time, which not only reduces the current stress of power switches, but also further improves the efficiency of the proposed APDC. Then, an instantaneous voltage control method is investigated to reduce the DC‐link voltage drop, which significantly improve the dynamic performance of the motor. The design guideline of key components is given in detail. The feasibility of the small capacitor motor drive system based on the proposed APDC is verified by experimental results.

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Section: Introductionmentioning

confidence: 99%

Single‐phase small capacitor motor drive system with high‐efficiency buck active power decoupling converter

Zhang

Zhu

et al. 2022

IET Power Electronics

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“…Generally, in traditional AC-DC-AC IPMSM drive systems, large capacity electrolytic capacitors are utilized at the DC-link to obtain a stable DC-link voltage. The electrolytic capacitor has a large volume [12][13][14][15]; about 20% to 40% of high power drives' volume would be occupied. In addition, the electrolyte may evaporate, thus it decreases the reliability of drive system [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

An Improved Sensorless Vector Control Method for IPMSM Drive with Small DC-Link Capacitors

Yin

Luo

et al. 2020

Energies

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In this paper, an improved sensorless vector control method for an interior permanent magnet synchronous motor (IPMSM) drive with small DC-link capacitors is proposed. First, a fast sliding-mode observer was applied, to enlarge the observer bandwidth. Then, an improved estimator based on a proportional integral resonant controller was designed for the estimate speed shaping, which means the actual speed can be tracked. This not only reduces the position estimate error, but also enhances the grid power factor and suppresses the input current harmonics. Simulation and experiments were conducted on a sensorless IPMSM drive system with a small film capacitor. The effectiveness of the proposed estimation method was verified by the simulation and experimental results. The estimated error was reduced and the grid current harmonics satisfy the requirements of EN61000-3-2.

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“…While film capacitors have a much higher reliability, they have a much less capacitance per unit than that of electrolytic capacitors. A small film capacitor improves the reliability of the system and eliminates the initial charging circuit, thus reducing the overall system volume and cost [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Small-capacity inverter systems are beneficial in applications such as fans, pumps, and compressors, where the load variation is not significant [10][11][12]. To improve the quality of the input current caused by small capacitors, many researchers have studied various control techniques, including the use of the pulse-power injection method, outputcurrent compensation technique, and harmonic injection technique [3,4,[6][7][8][9][10][11][12][13][14][15]. In the case of [8], the output-current compensation method distorted the output current in order to improve the input current.…”

Section: Introductionmentioning

confidence: 99%

Design and Control of Small DC-Link Capacitor-Based Three-Level Inverter with Neutral-Point Voltage Balancing

In¹,

Kim

Lee

2018

Energies

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This paper presents a method to improve the quality of input-output currents in a three-level neutral-point clamped (NPC) inverter with small direct current-link (DC-link) capacitor systems. The inverter systems with the small DC-link capacitors have several advantages in terms of cost, volume, life-time, and reliability when compared to inverters that use large DC-link capacitors. However, there are problems with respect to the deterioration of the input current quality and a severe ripple of neutral-point voltage (NPV), which can cause an aggravated output current. To mitigate these issues, an additional circuit is applied for the input current shaping and a compensation algorithm is applied to reduce the ripple voltage of NPV. The effectiveness of the proposed design and control method is verified with various simulation and experimental results.

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Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor

Cited by 42 publications

References 25 publications

Single‐phase small capacitor motor drive system with high‐efficiency buck active power decoupling converter

Single‐phase small capacitor motor drive system with high‐efficiency buck active power decoupling converter

An Improved Sensorless Vector Control Method for IPMSM Drive with Small DC-Link Capacitors

Design and Control of Small DC-Link Capacitor-Based Three-Level Inverter with Neutral-Point Voltage Balancing

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