- 标题
- 摘要
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- 实验方案
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Design and Implementation of a Dual-Input LLC Converter for PV-Battery Applications
摘要： This paper proposes a dual-input LLC resonant converter that interfaces with one PV panel and one battery energy storage system (BESS). The topology is a dual half-bridge LLC circuit with four active switches. This topology allows the two sources to share the same resonant tank for transferring energy to the load without the need for additional circuit components. A phase-shift pulse width modulation (PWM) control is employed to implement maximum power point tracking (MPPT) for PV panel and duty cycle is controlled to regulate battery current. The converter voltage gain is controlled by varying the operating frequency as in a typical LLC resonant converter. Zero-voltage-switching (ZVS) is realized in all switches over the entire range of source voltage and load conditions. In addition, voltage stress across switches does not exceed the input voltage. A simulation study was carried out to validate the operating principles of the proposed topology. The input voltage range of the PV source was selected to be 25 V to 50 V and the nominal input voltage of battery was 60 V with an output voltage regulated at 200 V DC.
关键词： battery energy storage,LLC resonant converter,dual-input LLC,microinverters
更新于2025-09-23 15:22:29
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LCL-T Resonant Converter Based on Dual Active Bridge Topology in Solar Energy Applications
摘要： Resonant LCL-T converter can operate as stable voltage source, being fed from current, for instance, the photovoltaic battery. It is shown that LCL-T resonant tank has intrinsic ability to convert stable AC current into stable AC voltage thus parametrically regulating output voltage at a fixed value. This mode of operation is made possible by the use of active (synchronous) rectifier to recoup energy from the output back to the LCL-T resonant tank. Basic characteristics of resonant LCL-T converter regulated by phase shift between inverter and rectifier regardless of a solar battery current drift have been defined. It is shown that phase control guarantees 0 voltage and 0 current on switching; however, turn-off current could be substantial. Calculations and assumptions made in this study have been confirmed by simulation and hardware prototype.
关键词： Bidirectional dual active bridge,ZCS,LCL resonant converter,Resonant converter,Spacecraft power supply system,ZVS
更新于2025-09-23 15:21:21
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A Soft-switched, Multiport Photovoltaic Power Optimizer with Integrated Storage Interface and Output Voltage Regulation
摘要： This paper proposed a multiport converter (MPC) configuration for photovoltaic (PV)-battery system. In the battery charging and discharging circuits are integrated with the PV power optimizer through high frequency AC link. The proposed converter system is capable of regulating the output voltage, following battery charging profile and tracking the maximum power point (MPP) of each PV module. Variable switching frequency is used to achieve MPPT in this design. All the switches of the converter are able to achieve soft-switching turn on and turn off at different operating conditions. The operating principles and the control strategy of the proposed converter are presented. Simulation results and experimental results on a 175W system are presented to validate the features of the proposed converter.
关键词： Soft-switching,Multi-resonant converter,Multiport converter (MPC),MPPT,battery charging profile,PV-battery system
更新于2025-09-23 15:21:01
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Design and Implementation of 150 W AC/DC LED Driver with Unity Power Factor, Low THD, and Dimming Capability
摘要： This paper presents the implementation of a two-stage light-emitting diode (LED) driver based on commercial integrated circuits (IC). The presented LED driver circuit topology, which is designed to drive a 150 W LED module, consists of two stages: AC-DC power factor correction (PFC) stage and DC/DC power converter stage. The implementation of the PFC stage uses IC NCP1608, which uses the critical conduction mode to guarantee a unity input power factor with a wide range of input voltages. The DC/DC power converter with soft-switching characteristics for the entire load range uses IC FLS2100XS. Furthermore, the design of an electromagnetic interference (EMI) filter for the LED driver and the dimming control circuit are discussed in detail. The hardware prototype, an LED lighting system, with a rated power of 150 W/32 V from a nominal 220 V/50 Hz AC voltage supply was tested to show the effectiveness of the design. The presented LED driver was tested for street lighting, and the experimental results show that the power factor (PF) was higher than 0.97, the total harmonics distortion (THD) was lower than 7%, and the efficiency was 91.7% at full load. The results prove that the performance of the presented LED driver complies with the standards: IEC61000-3-2 and CIRSP 15:2009.
关键词： EMI filter,power factor correction,LED driver,LLC resonant converter
更新于2025-09-23 15:19:57
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[IEEE 2019 8th International Conference on Power Systems (ICPS) - Jaipur, India (2019.12.20-2019.12.22)] 2019 8th International Conference on Power Systems (ICPS) - An Efficient LLC Resonant Converter Design for Photovoltaic Application
摘要： This paper presents a novel design procedure to the LLC resonant converter for improve the ef?ciency of photovoltaic (PV) applications. State of the art LLC resonant converter operates either in buck or boost mode by operating at a switching frequency higher or lower than the resonant frequency respectively. However, such operation of the converter at a switching frequency other than the resonant frequency may result in increased turn off losses for MOSFET, conduction losses, and hard commutation for the recti?er diodes which reduces the ef?ciency of the converter. In this paper, a design procedure is proposed where the converter operates very close to the resonant frequency (10% margin) in buck and boost mode of operation to improve the ef?ciency of the converter. The design procedure mainly involves the control of the transformer tap ratio such that the converter operates near the resonant frequency. Since the transformer tap changing control is slow in nature, the proposed control strategy is mainly suited for photovoltaic application where the input voltage to the converter does not change rapidly during the daytime. The transformer tap control is suggested based on the historical data for solar energy, i.e. recorded temperature and solar irradiance. On changing the transformer tap ratio according to the input voltage, the switching frequency is observed to be moving towards the resonant frequency of the LLC resonant converter. Simulations for both the boost and buck mode operation of the resonant tank of the converter are performed, and with the proposed control higher ef?ciency is achieved for PV applications.
关键词： switching frequency,conduction losses,LLC Resonant Converter,turn-off losses
更新于2025-09-23 15:19:57
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[IEEE 2019 International Semiconductor Conference (CAS) - Sinaia, Romania (2019.10.9-2019.10.11)] 2019 International Semiconductor Conference (CAS) - Voltage Controlled Oscillator for Small-Signal Capacitance Sensing
摘要： SiC MOSFETs are applied to constitute a three-phase, 5-kW LLC series resonant dc/dc converter with isolation transformers. A switching frequency of around 200 kHz for the transistors successfully reduces the volume of these isolation transformers, whereas insulated-gate bipolar transistors (IGBTs) are not capable of achieving such a high switching speed. The high-voltage tolerance of SiC MOSFETs, 1200 V, enables increasing the input voltage up to 600 V. High-voltage tolerance, on the other hand, is not compatible with low on-resistance for Si MOSFETs. A three-phase circuit topology is used to achieve up to 5 kW of power capacity for the converter and reduce per-phase current at the same time. Current-balancing transformers among these three phases effectively suppress a maximum peak current from arising in the circuit, a technique that miniaturizes the input and output capacitances. The conversion efficiency of the converter reaches 97.6% at 5-kW operation.
关键词： SiC MOSFETs,zero-voltage switching (ZVS),Current-balancing transformers,zero-current switching (ZCS),three phase,LLC resonant converter
更新于2025-09-19 17:13:59
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Comparative Analysis between the Half Brige Resonant LLC and Buck Converters as the Power Stage of an LED Driver
摘要： This paper presents a comparative analysis between the Buck Converter and the LLC Resonant Converter working as LED drivers. These converters are placed after a Power-Factor-Correction (PFC) stage, in order to work as the Power-Control (PC) stage of two-stage LED drivers. The main objective of this study is to evaluate these converters in terms of efficiency, volume and cost using different switching frequencies supplying an LED load of 180W. The methodology used theoretical losses calculation and industrial feedback in order to compare the proposed converters. The Buck converter was evaluated under 33kHz, 60kHz and 100kHz, and the LLC Resonant converter was evaluated under 100kHz, 140kHz, 180kHz, and 220kHz. Both converters were dimmed from 100% to 20%.
关键词： LED Driver,Resonant Converter,LLC
更新于2025-09-16 10:30:52
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[IEEE 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe) - Genova, Italy (2019.9.3-2019.9.5)] 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe) - A Single-Phase dc-ac Dual-Active-Bridge Based Resonant Converter For Grid-Connected Photovoltaic (PV) Applications
摘要： This paper presents the topology, modelling and control strategy for a single-phase grid-connected converter for photovoltaic (PV) applications based on the series-resonant dual active bridge (DAB). A state-space large-signal model is derived for phase-shift based modulations, and a linearized model is presented for control design. A multi-loop control strategy is presented where a current-control loop regulates the current that the converter injects in-phase with the grid voltage, while a slower loop regulates the PV array voltage for MPPT. To verify the model and control strategy, simulation and experimental results are presented.
关键词： Power Converter,ZVS converters,Photovoltaic,Hardware,Converter circuit,DC-AC,Converter control,Microinverter,Modelling,High frequency power converter,Dual active bridge,Resonant converter
更新于2025-09-12 10:27:22
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[IEEE 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN) - Pondicherry, India (2018.7.6-2018.7.7)] 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCA) - Power Factor Correction in Z-Source Resonant Converter for Wireless Power Transfer Applications
摘要： In this paper the Z-source converter is introduced to power factor correction (PFC) applications. The concept is demonstrated through a wireless power transfer (WPT) system for electric vehicle battery charging, namely Z-source resonant converter (ZSRC). Due to the Z-source network (ZSN), the ZSRC inherently performs PFC and regulate the system output voltage simultaneously, without adding extra semiconductor devices and control circuitry to the conventional WPT system such as conventional PFC converters do. In other words, the ZSN can be categorized as a family of the single stage PFC converters. In addition, the ZSN is suitable for high power applications since it is immune to shoot-through states, which increases reliability and adds a boost feature to the system. The ZSRC-based WPT system operating principle is described and analyzed in this paper. Simulations, and experimental results based on a 1-kW prototype with 20-cm air gap between the system primary and secondary side are presented to validate the analysis, and demonstrate the effectiveness of the ZSN in the PFC of the WPT system.
关键词： Power factor correction (PFC),Wireless Power Transfer (WPT),Total Harmonic Distortion (THD),Z-source resonant converter (ZSRC),Series resonant converter (SRC)
更新于2025-09-10 09:29:36
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Dual-Input Single-Resonant Tank LLC Converter with Phase Shift Control for PV Applications
摘要： This paper proposes a dual-input LLC resonant converter that interfaces with two PV panels. The topology is a dual half-bridge LLC circuit with four active switches. This topology allows the two sources to share the same resonant tank for transferring energy to the load without the need for additional circuit components. A phase-shift pulse width modulation independent maximum power point tracking (MPPT) for each PV panel. Independent MPPT is achieved by varying the PWM phase shift of each source. Zero-voltage-switching (ZVS) is realized in all switches over the entire range of source voltage and load conditions. In addition, voltage stress across switches does not exceed the input PV voltage. A 500-W prototype was built to demonstrate the performance of the proposed topology. The input voltage range was selected between 25 V to 50 V with an output voltage regulated at 220 V DC. Experimental results show that the proposed converter can achieve the peak efficiency of 95.8% while maintaining a wide input voltage range and implementing MPPT for each PV panel.
关键词： dual-input LLC,DC gain analysis,independent MPPT,PWM phase shift,LLC resonant converter
更新于2025-09-10 09:29:36