Auxiliary Circuit for a Null Indicator

1967 ◽  
Vol 35 (10) ◽  
pp. xi-xii
Author(s):  
D. S. Ainslie
Keyword(s):  
Null Indicator ◽  
Auxiliary Circuit

High-Speed Switching Method of MOSFETs Using Switching Assist Auxiliary Circuit

2013 ◽  
Vol 133 (12) ◽  
pp. 1186-1192
Author(s):  
Toshihiko Noguchi ◽  
Tomohiro Mizuno ◽  
Munehiro Murata
Keyword(s):  
High Speed ◽  
Switching Method ◽  
High Speed Switching ◽  
Auxiliary Circuit

scholarly journals ZVS Auxiliary Circuit for a 10 kW Unregulated LLC Full-Bridge Operating at Resonant Frequency for Aircraft Application

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1850 ◽  
Author(s):  
Yann E. Bouvier ◽  
Diego Serrano ◽  
Uroš Borović ◽  
Gonzalo Moreno ◽  
Miroslav Vasić ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Power Density ◽  
High Efficiency ◽  
Harmonic Approximation ◽  
Maximum Efficiency ◽  
Voltage Gain ◽  
Load Range ◽  
Transition Analysis ◽  
Aircraft Application ◽  
Auxiliary Circuit

In modern aircraft designs, following the More Electrical Aircraft (MEA) philosophy, there is a growing need for new high-power converters. In this context, innovative solutions to provide high efficiency and power density are required. This paper proposes an unregulated LLC full-bridge operating at resonant frequency to obtain a constant gain at all loads. The first harmonic approximation (FHA) model is not accurate enough to estimate the voltage gain in converters with high parasitic resistance. A modified FHA model is proposed for voltage gain analysis, and time-based models are used to calculate the instantaneous current required for the ZVS transition analysis. A method using charge instead of current is proposed and used for this ZVS analysis. Using this method, an auxiliary circuit is proposed to achieve complete ZVS within the whole load range, avoiding a gapped transformer design and increasing the efficiency and power density. A 28 Vdc output voltage prototype, with 10 kW peak output power, has been developed to validate the theoretical analysis and the proposed auxiliary circuit. The maximum efficiency (96.3%) is achieved at the nominal power of 5 kW.

Transformer‐less five‐level high‐voltage full‐scale converter with a self‐balance auxiliary circuit for 10 MW wind turbines

2017 ◽  
Vol 10 (14) ◽  
pp. 1841-1851 ◽  
Author(s):  
Xiang‐jun Zeng ◽  
Hang Wang ◽  
Xiao Zhang ◽  
De‐ling Gong ◽  
Xu Yang
Keyword(s):  
Wind Turbines ◽  
High Voltage ◽  
Full Scale ◽  
Auxiliary Circuit
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