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首页> 外文期刊>Power Electronics, IET >Practical implementation of a silicon carbide-based 300 kHz, 1.2 kW hard-switching boost-converter and comparative thermal performance evaluation
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Practical implementation of a silicon carbide-based 300 kHz, 1.2 kW hard-switching boost-converter and comparative thermal performance evaluation

机译:基于碳化硅的300 kHz,1.2 kW硬开关升压转换器的实际实现和比较热性能评估

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摘要

Field experience shows that the vast majority of solar photovoltaic (PV) energy system failures are related to the power conditioning system (PCS). Among the principal reliability issues of PV PCSs are thermal management and heat extraction mechanisms. The study considers practical implementation of a DC-DC boost converter as a solar PV pre-regulator in terms of thermal management, with comparative thermal performance evaluations of silicon carbide (SiC) semiconductors and silicon (Si) metal-oxide-semiconductor field-effect transistors (MOSFETs). Thermal performance evaluation of power semiconductors is based on a 1.2 kW DC-DC converter with: (i) various switching frequencies up to 300 kHz, in steps of 25 kHz; (ii) case temperatures from 25 to 150°C; and (iii) a natural convection heatsink with temperature increase rate of 0.5°C/W. Simulation and experimental results verify that losses from SiC semiconductors are low compared with Si MOSFETs. This provides an opportunity for designing a pre-regulator DC-DC boost converter with less effort required for thermal management and enhanced reliability.
机译:现场经验表明,绝大多数太阳能光伏(PV)能源系统故障都与功率调节系统(PCS)有关。 PV PCS的主要可靠性问题包括热管理和吸热机制。该研究从热管理的角度考虑了将DC-DC升压转换器作为太阳能PV预调节器的实际实现方式,并通过对碳化硅(SiC)半导体和硅(Si)金属氧化物半导体场效应的热性能进行了比较评估晶体管(MOSFET)。功率半导体的热性能评估基于1.2 kW DC-DC转换器,该转换器具有:(i)高达300 kHz的各种开关频率,步进为25 kHz; (ii)外壳温度为25至150°C; (iii)自然对流散热器,其升温速率为0.5°C / W。仿真和实验结果证明,与Si MOSFET相比,SiC半导体的损耗较低。这为设计预调节器DC-DC升压转换器提供了机会,从而减少了热管理所需的工作量并提高了可靠性。

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