Search Results - Electrical

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Double-side Cooled Medium-Voltage Power Modules for Electric Grid Applications
THE CHALLENGE Packaging innovations are needed for medium-voltage semiconductor devices to enable their integration into electric grid applications due to a unique trade-off between the insulation requirement and thermal management of the medium-voltage power modules. The conventional packaging technology utilizes a wire-bonded or press-pack module...
Published: 6/7/2022   |   Inventor(s): Guo-Quan Lu, Zichen Zhang
Keywords(s):  
Category(s): Electrical
Double-Side Cooled Power Modules with Sintered-Silver Interposer
THE CHALLENGE Advances of wide bandgap devices, e.g. SiC and GaN, enable power electronics converters with higher efficiency and higher power-density, but pose significant challenges on power module packaging. Planar, double-side cooled power modules are emerging in electric-drive inverters because of their low profile, better heat extraction, and...
Published: 6/6/2022   |   Inventor(s): Guo-Quan Lu, Chao Ding
Keywords(s):  
Category(s): Electrical
In-Fiber Optical Micro-Resonators
THE CHALLENGE The global fiber optic market is estimated to be six billion dollars, and will only grow as our dependence upon high speed internet increases. Right now, fiber optics also provide necessary sensory data for ultrasound detection, temperature measurement, telecommunications, measurement of bio-chemical species, and a variety of other applications....
Published: 10/11/2021   |   Inventor(s): Shuo Yang, Anbo Wang
Keywords(s):  
Category(s): Electrical, Devices
Single Gate Driver System for DC Circuit Breakers
THE CHALLENGE Single power semiconductor devices cannot meet the voltage demands for the solid-state switch in medium voltage DC circuit breakers (DCCBs) due to limitations in their voltage blocking capabilities. As a result, commercially available devices are often connected in series to meet the final clamping voltage target. Voltage balancing across...
Published: 9/29/2021   |   Inventor(s): Jian Liu, Lakshmi Ravi, Dong Dong, Rolando Burgos, Steve Schmalz
Keywords(s):  
Category(s): Electrical
Thermal Drawing of Strain Sensing Polymer Fiber
THE CHALLENGE Strain sensing has the potential to revolutionize biomedicine and how we collect data regarding physiological conditions, but technologies available right now have notable limitations. Current metal or silicon-based strain sensors cannot sense small deformations (less than 5%) and are not biocompatible; as a result, they are not suitable...
Published: 3/5/2021   |   Inventor(s): Yujing Zhang, Xiaoting Jia
Keywords(s):  
Category(s): Electrical
A Broadband, High Gain, End-fed Coaxial Collinear Antenna
The Challenge There are a variety of VHF/UHF communication systems that require an omnidirectional antenna which is low-weight, portable, easy to fabricate, and low cost. A vertical collinear array of dipole antennas is a popular candidate for mobile communication due to its omnidirectional radiation pattern. These are currently used in a wide variety...
Published: 2/5/2021   |   Inventor(s): Majid Manteghi, Ali Hosseini-Fahraji
Keywords(s):  
Category(s): Computer Hardware, Electrical
High Efficiency Wearable Thermoelectric Cooler
 
Published: 4/18/2019   |   Inventor(s): Ravi Kishore, Shashank Priya, Amin Nozariasbmarz, Bed Poudel
Keywords(s):  
Category(s): Electrical
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 phase...
Published: 11/3/2017   |   Inventor(s): Jong-Woo Kim, Jih-Sheng (Jason) Lai, Moonhyun Lee
Keywords(s):  
Category(s): Electrical, Engineering
Identification, Modeling, and Filtering of the Quantization Error in Encoder Equivalent Output
Encoder equivalent output is widely used in modern industrial drives equipped with tools for improving the encoder resolution. A standard application for this output is electronic gearing for controlling slave amplifiers via the encoder equivalent output of a master drive. If left uncorrected, this noise would report unreal noise to the user, or lead...
Published: 10/3/2017   |   Inventor(s): Milad Hosseinipour, Mehdi Ahmadian
Keywords(s):  
Category(s): Electrical, Engineering
60 GHz Wireless Link and Sensor for Location, Estimation and Movement Tracking
Using signal characteristics of the IEEE 802.11ad standard to obtain very precise estimates of user location, orientation and movement in addition with very high throughput. While wireless sensing is not a new idea, the proposed improvement are novel and substantial.
Published: 7/10/2017   |   Inventor(s): Jeffrey Reed, Tarun Cousik
Keywords(s):  
Category(s): Communication, Electrical
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