Controlled-Type ZVS Technique without Auxiliary Components for Micro-inverters

Zhang, Qian; Zhang, Dehua; Hu, Haibing; Shen, Z. John; Batarseh, Issa

doi:10.6113/jpe.2013.13.6.919

Cited by 4 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A design uses one auxiliary switch shown in [10] and the maximum voltage across the main switches will increase which is twice as high as the inverter's input DC voltage. [11,12] suggested a ZVS inverter of the regulated kind without any extra parts. ZVS circumstances are produced by hysteresis controlling the inductor current to function in a bidirectional manner during a switching cycle.…”

Section: Introductionmentioning

confidence: 99%

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

Wu,

Zhao

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The majority of soft-switching inverters often use auxiliary semiconductor switches that run for extremely brief periods to provide ZVS conditions for the main switches, potentially raising the inverter system’s cost. This work presented a simple zero-voltage switching (ZVS) approach by employing a bi-directional inductor current for the single-phase inverter, which reduced the cost of auxiliary switches and simplified the soft-switching inverter design. All switches can achieve ZVS operation without additional resonant components. The conventional PWM control strategies are applied in the proposed technique, and thus the problems existing in variable switching frequency converters are removed. This article describes the soft-switching approach and detailed circuit functioning. Different key parameters are optimized to improve efficiency. To confirm the suggested ZVS method, a hardware inverter prototype is created, built, and tested. To validate the inverter’s characteristics and validity, experimental results are presented.

show abstract

Section: Introductionmentioning

confidence: 99%

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

Wu,

Zhao

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…ARSI has an auxiliary circuit placed between different phase-leg and resonant capacitors connected in parallel to the main switches. Compared with the hysteresis current-controlled RPI [6], [7], ARSI can achieve ZVS from zero load to full load and use pulse-width modulation (PWM) at a fixed switching frequency. Compared with the auxiliary resonant commutated pole inverter (ARCPI) [8], [9], ARSI eliminates the split capacitors and solves the voltage imbalance problems.…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Improved Auxiliary Resonant Snubber Inverter that Reduces the Auxiliary Current and THD

Zhang¹,

Kou²,

Zhang³

et al. 2016

Journal of Power Electronics

View full text Add to dashboard Cite

An LC filter is required to reduce the output current ripple in the auxiliary resonant snubber inverter (ARSI) for high-performance applications. However, if the traditional control method is used in the ARSI with LC filter, then unnecessary current flows in the auxiliary circuit. In addressing this problem, a novel load-adaptive control that fully uses the filter inductor current ripple to realize the soft-switching of the main switches is proposed. Compared with the traditional control implemented in the ARSI with LC filter, the proposed control can reduce the required auxiliary current, contributing to higher efficiency and DC-link voltage utilization. In this study, the detailed circuit operation in the light load mode (LLM) and the heavy load mode (HLM) considering the inductor current ripple is described. The characteristics of the improved ARSI are expressed mathematically. A prototype with 200 kHz switching frequency, 80 V DC voltage, and 8 A maximum output current was developed to verify the effectiveness of the improved ARSI. The proposed ARSI was found to successfully operate in the LLM and HLM, achieving zero-voltage switching (ZVS) of the main switches and zero-current switching (ZCS) of the auxiliary switches from zero load to full load. The DC-link voltage utilization of the proposed control is 0.758, which is 0.022 higher than that of the traditional control. The peak efficiency is 91.75% at 8 A output current for the proposed control, higher than 89.73% for the traditional control. Meanwhile, the carrier harmonics is reduced from -44 dB to -66 dB through the addition of the LC filter.

show abstract

“…In EVs, a DC-AC inverter supplies the high power electric vehicle motors torques of the propulsion system, utility loads and automotive electronics [3]. However, the cost, power density, efficiency and reliability still present major barriers to the implementation of inverter power supply equipments on a large scale [4]. Besides, the working conditions of EVs have strict requirements for inverters such as scale and voltage ratio.…”

Section: Introductionmentioning

confidence: 99%

The Application of Variable Integral Gain Double Closed-Loop Control for Vehicle Inverters

Lu¹,

Liu²,

Cao³

et al. 2016

IJCA

View full text Add to dashboard Cite

show abstract

Controlled-Type ZVS Technique without Auxiliary Components for Micro-inverters

Cited by 4 publications

References 20 publications

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

Single-Phase Improved Auxiliary Resonant Snubber Inverter that Reduces the Auxiliary Current and THD

The Application of Variable Integral Gain Double Closed-Loop Control for Vehicle Inverters

Contact Info

Product

Resources

About