Improvement of power conversion efficiency of soft-switching inverter in range of low output power by adjustable dead time control

2012 ◽  
Vol 180 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Nobukazu Hoshi ◽  
Ayaka Matsui
Keyword(s):  
Power Conversion Efficiency ◽  
Output Power ◽  
Conversion Efficiency ◽  
Dead Time ◽  
Power Conversion ◽  
Soft Switching ◽  
Time Control

Waveform Equations, Output Power, and Power Conversion Efficiency for Class-E Inverter Outside Nominal Operation

2014 ◽  
Vol 61 (4) ◽  
pp. 1799-1810 ◽  
Author(s):  
Tomoharu Nagashima ◽  
Xiuqin Wei ◽  
Tadashi Suetsugu ◽  
Marian K. Kazimierczuk ◽  
Hiroo Sekiya
Keyword(s):  
Power Conversion Efficiency ◽  
Output Power ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Class E

scholarly journals A Dynamic Threshold Cancellation Technique for a High-Power Conversion Efficiency CMOS Rectifier

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6883
Author(s):  
António Godinho ◽  
Zhaochu Yang ◽  
Tao Dong ◽  
Luís Gonçalves ◽  
Paulo Mendes ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Output Power ◽  
Conversion Efficiency ◽  
High Power ◽  
Vibrational Energy ◽  
Voltage Drop ◽  
Power Conversion ◽  
Dynamic Threshold ◽  
Cmos Process ◽  
High Power Conversion Efficiency

Power conversion efficiency (PCE) has been one of the key concerns for power management circuits (PMC) due to the low output power of the vibrational energy harvesters. This work reports a dynamic threshold cancellation technique for a high-power conversion efficiency CMOS rectifier. The proposed rectifier consists of two stages, one passive stage with a negative voltage converter, and another stage with an active diode controlled by a threshold cancellation circuit. The former stage conducts the signal full-wave rectification with a voltage drop of 1 mV, whereas the latter reduces the reverse leakage current, consequently enhancing the output power delivered to the ohmic load. As a result, the rectifier can achieve a voltage and power conversion efficiency of over 99% and 90%, respectively, for an input voltage of 0.45 V and for low ohmic loads. The proposed circuit is designed in a standard 130 nm CMOS process and works for an operating frequency range from 800 Hz to 51.2 kHz, which is promising for practical applications.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

The Effect of Donor Molecular Structure on Power Conversion Efficiency of Small-Molecule-Based Organic Solar Cells

2019 ◽  
Vol 16 (3) ◽  
pp. 236-243 ◽  
Author(s):  
Hui Zhang ◽  
Yibing Ma ◽  
Youyi Sun ◽  
Jialei Liu ◽  
Yaqing Liu ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Molecular Design ◽  
Power Conversion ◽  
The Relationship

In this review, small-molecule donors for application in organic solar cells reported in the last three years are highlighted. Especially, the effect of donor molecular structure on power conversion efficiency of organic solar cells is reported in detail. Furthermore, the mechanism is proposed and discussed for explaining the relationship between structure and power conversion efficiency. These results and discussions draw some rules for rational donor molecular design, which is very important for further improving the power conversion efficiency of organic solar cells based on the small-molecule donor.

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