Search Results - jih-sheng (jason) lai

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Power (Adjustment) Control Method for Induction Apparatus
The invention is a power control method for a power converter that ensures high-side switching devices operating under zero-voltage turn-on condition while low-side switching devices operating under zero-voltage turn-on and zero-voltage turn-off condition. It achieves very high efficiency operation for a wide load range without having to shift the ...
Published: 11/3/2017   |   Inventor(s): Jong-Woo Kim, Jih-Sheng (Jason) Lai, Moonhyun Lee
Keywords(s):  
Category(s): Electrical, Engineering
Soft-Switching Inverter Efficiency Improvement with Hybrid Switch
A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-cur...
Published: 9/24/2014   |   Inventor(s): Jih-Sheng (Jason) Lai, Wensong Yu
Keywords(s): Electronics
Category(s): Devices, Electrical, Energy, Engineering
Converter Topologies for Multiple Energy Sources Power Conversions
Invention is a power converter circuit that effectively utilizes multiple energy sources and makes them available at a higher voltage level so that it is more efficient for high power conversions. The multiple energy sources may contain a primary generating source such as fuel cell and photovoltaic, and a secondary power source such as a rechargea...
Published: 9/3/2012   |   Inventor(s): Jih-Sheng (Jason) Lai
Keywords(s): Electronics, Environment/Fuel Cell
Category(s): Electrical
A Start-up Circuit and Control for Isolated Boost DC/DC Converters
This invention is to overcome the start-up surge current problem of isolated boost converters. In boost converters, the output voltage must be higher than the input voltage. However, the initial output voltage normally starts from zero, and a surge current will occur that can easily damage the entire converter. The invention functions like a fly...
Published: 8/6/2012   |   Inventor(s): Lizhi Zhu, Fred Lee, Jih-Sheng (Jason) Lai
Keywords(s): Electronics, Environment/Fuel Cell
Category(s): Electrical
An Accelerated Commutation for Passive-Clamped Isolated Boost Converters
The invention is to use a special control method to accelerate transformer current transfer from one-side to the other side. In a bi-directional dc/dc converter, one side of the transformer can be current-fed or primary side and the other side can be voltage fed or secondary side. The primary side normally experiences a high voltage overshoot dur...
Published: 8/6/2012   |   Inventor(s): Lizhi Zhu, Fred Lee, Jih-Sheng (Jason) Lai
Keywords(s): Electronics
Category(s): Electrical
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