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基于新型半导体的微型逆变器拓扑结构及应用
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作者 张从峰 《应用技术学报》 2023年第2期95-102,共8页
微型逆变器具备最大功率点跟踪(MPPT)控制能力,展现出更高的灵活性和稳定性,能够有效解决发电组件不平衡和不匹配问题,从而提升系统整体发电效率。总结了近期微型逆变器拓扑结构研究,并探讨了其在光伏发电等领域的应用。将微型逆变器的... 微型逆变器具备最大功率点跟踪(MPPT)控制能力,展现出更高的灵活性和稳定性,能够有效解决发电组件不平衡和不匹配问题,从而提升系统整体发电效率。总结了近期微型逆变器拓扑结构研究,并探讨了其在光伏发电等领域的应用。将微型逆变器的拓扑结构分为单级拓扑结构、直流电-直流电-交流电(DC-DC-AC)多级拓扑结构和DC-AC-AC多级拓扑结构,并对各种拓扑结构的优缺点以及对发电效率和安全性的影响进行了分析。其中,单级拓扑结构具有较高的转换效率,但结构紧凑、改进难度较高;DC-AC-AC多级拓扑结构成本较高,相关研究较少;DC-DC-AC多级拓扑结构控制简单、结构清晰易改进,是当前研究热点和微型逆变器未来发展的方向。作为能源电力和电机控制等领域的核心部件,微型逆变器具有巨大的发展潜力。随着新材料和技术的进步,微型逆变器在单机功率转换效率和控制方法方面将取得更大突破,从而进一步提升光伏发电系统的安全性和效率。 展开更多
关键词 微型逆变器 拓扑结构 光伏逆变器 dc-ac转换器 DC-DC转换器
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A New Zero-Voltage Transition Power Factor Corrected Single-Phase Single-Stage AC-to-DC Converter
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作者 Azizur Rahman 《Journal of Energy and Power Engineering》 2012年第3期397-403,共7页
This paper presents a new ZVT (zero-voltage transition) single-stage ac-to-dc converter using PWM (pulse width modulation) and HF (high frequency) transformer isolation with capacitive output filter. In this con... This paper presents a new ZVT (zero-voltage transition) single-stage ac-to-dc converter using PWM (pulse width modulation) and HF (high frequency) transformer isolation with capacitive output filter. In this converter a front-end power factor corrected boost stage integrates with a cascaded dc-to-dc bridge HF converter. The front-end boost converter operates in discontinuous current mode and ensures natural power factor correction with very simple control. The auxiliary circuit of this topology deals with very small power and is placed out of the main power path. As a result, the auxiliary circuit components have smaller power rating as opposed to main converter components. Also, output rectifier voltage is clamped to output voltage due to capacitive output filter. Identification and analyses of different operating modes of this converter are presented. Based on these analyses design example of a 50 kHz, 48 V, 1 kW ac-to-dc converter is presented. PSPICE simulation results of the designed converter are presented and explained to verify the performance of this converter. 展开更多
关键词 Power factor correction high frequency isolation zero-voltage transition.
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High-Performance AC-DC Power Electronic Converter Generator for Hybrid-Solar Vehicles
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作者 Jozef Tutaj Bogdan Fijalkowski 《Journal of Energy and Power Engineering》 2015年第7期648-659,共12页
This paper describes the principles of operation and the physical model of an advanced AC-DC converter generator (with the electronic converter acting as an AC-DC rectifier with reverse-conducting MOSFETs (metal-oxi... This paper describes the principles of operation and the physical model of an advanced AC-DC converter generator (with the electronic converter acting as an AC-DC rectifier with reverse-conducting MOSFETs (metal-oxide semiconductor field-effect transistors) as fast-electronic switches with a relatively low ON-state voltage drop) for HSVs. An AC-DC converter, when seen as an AC-DC rectifier, can be used in many fields, e.g., for multi-functional AC-DC/DC-AC convener generator^starter and conventional DC-AC convener motors and AC-DC converter generators or generator sets, welding machines, etc. The paper also describes a novel AC-DC convener, with reverse-conducting transistors and without the use of optoelectronic separation (which does not require a separate power supply), which may be easily realized in IC (integrated-circuit) technology. Computer simulation allows for waveform evaluation for timing analysis of all components of the AC-DC-converter's physical model, both during normal operation as well as in some states of emergency. The paper also presents the results of bench experimental studies where the MOSFETs were used as fast-electronic switches with a relatively low ON-state voltage drop. For experimental studies, a novel AC-DC converter has been put together on the Mitsubishi FM600TU-3A module. The AC-DC converter with reverse-conducting transistors in a double-way connection has a lot of advantages compared to the conventional AC-DC convener acting as a diode rectifier, such as higher energy efficiency and greater reliability resulting from the lower temperature of electronic switches. 展开更多
关键词 HSV (hybrid-solar vehicles) electronic switches electronic converter power losses
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