研究了电力线噪声分离网络技术,包括网络拓扑优化、分离网络元器件性能改善以及利用散射参数测量进行分离网络参数提取等。结果表明,上述技术可明显提高分离网络性能,如插损提高约3dB,噪声抑制比提高15dB以上。此外还分别完成了基于噪...研究了电力线噪声分离网络技术,包括网络拓扑优化、分离网络元器件性能改善以及利用散射参数测量进行分离网络参数提取等。结果表明,上述技术可明显提高分离网络性能,如插损提高约3dB,噪声抑制比提高15dB以上。此外还分别完成了基于噪声分离网络的开关电源电力线传导噪声和电力载波通信(power line communication,PLC)中的电力线辐射干扰噪声诊断抑制2个实验,验证了文中方法有效性。展开更多
The results are presented of an experimental investigation of heat transfer in an air-liquid cooling system for a Switch-Mode Power Supply (SMPS) for TV digital power amplifiers. Since these SMPSs are characterized by...The results are presented of an experimental investigation of heat transfer in an air-liquid cooling system for a Switch-Mode Power Supply (SMPS) for TV digital power amplifiers. Since these SMPSs are characterized by high power and high compactness, thereby making the standard cooling techniques difficult to be used, a new cooling system is developed, using water and air as the cooling media. The active components (MOSFETs) are cooled with a liquid cold-plate, the passive ones (condensers, transformers, coils) with an air flow, in turn cooled by the cold-plate. By inserting the cooling system in an experimental tool where it is possible to control the cooling water, measurements are made of temperature in the significant points of the SMPS. The electric efficiency is also measured. The evaluation of the thermal performance of this cooling system is useful in order to limit its maximum operational temperature. The efficacy of the cooling system is demonstrated;the trends of efficiency and power dissipation are evidenced.展开更多
文摘研究了电力线噪声分离网络技术,包括网络拓扑优化、分离网络元器件性能改善以及利用散射参数测量进行分离网络参数提取等。结果表明,上述技术可明显提高分离网络性能,如插损提高约3dB,噪声抑制比提高15dB以上。此外还分别完成了基于噪声分离网络的开关电源电力线传导噪声和电力载波通信(power line communication,PLC)中的电力线辐射干扰噪声诊断抑制2个实验,验证了文中方法有效性。
文摘The results are presented of an experimental investigation of heat transfer in an air-liquid cooling system for a Switch-Mode Power Supply (SMPS) for TV digital power amplifiers. Since these SMPSs are characterized by high power and high compactness, thereby making the standard cooling techniques difficult to be used, a new cooling system is developed, using water and air as the cooling media. The active components (MOSFETs) are cooled with a liquid cold-plate, the passive ones (condensers, transformers, coils) with an air flow, in turn cooled by the cold-plate. By inserting the cooling system in an experimental tool where it is possible to control the cooling water, measurements are made of temperature in the significant points of the SMPS. The electric efficiency is also measured. The evaluation of the thermal performance of this cooling system is useful in order to limit its maximum operational temperature. The efficacy of the cooling system is demonstrated;the trends of efficiency and power dissipation are evidenced.
