Search Results - Transportation

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Multi-Tool Additive Manufacturing Machine
This novel AM machine utilizes multiple additive manufacturing technologies in a single system in order to make multi-material parts in individual layers of a single print. It is also useful to rapidly explore different materials and material combinations across different additive technologies. It is capable of 3D printing metals, ceramics, polymer...
Published: 5/24/2017   |   Inventor(s): Grady Wagner, Christopher Williams, Daniel Rau, Scott Ziv, Lindsey Bass, Mitchell Wolf, David Wolf
Keywords(s):  
Category(s): Devices, Engineering, Consumer Products, Transportation
Forced Unbalanced Method to Reduce Transient Current Unbalance in Semiconductor Power Switches
Switching power devices, specifically SiC MOSFET, has wider parameter variations (Vth, Rds(on)) due to fabrication process; therefore, when putting several MOSFET dies togther in parallel in a power module, there will be current/power unbalance when they are being used. Several publications have mentioned about using different control techniques to...
Published: 2/6/2017   |   Inventor(s): Zichen Miao, Yincan Mao, Khai Ngo, Chi Ming Wang
Keywords(s):  
Category(s): Electrical, Energy, Engineering, Transportation
Parasitic Inductances Coupling to Reduce Transient Current Unbalance in Semiconductor Power Switches
Switching power devices, specifically SiC MOSFET, has wider parameter variations (Vth, Rds(on)) due to fabrication process: therefore, when putting several MOSFET dies together in parallel in a power module, there will be current/power unbalance when they are being used. Several publications have mentioned about using different control techniques ...
Published: 1/13/2017   |   Inventor(s): Yincan Mao, Zichen Miao, Khai Ngo, Chi Ming Wang
Keywords(s):  
Category(s): Electrical, Energy, Engineering, Transportation
Use Parasitic Inductance Coupling to Eliminate Power Device Switching Operation Reliability Issues Such As Cross-Talk, Self Turn-On, and Self-Sustained Oscillation
The purpose of this invention is to show the new concept of using parasitic inductance coupling to improve SiC MOSFET switching operation reliability to prevent detrimental phenomenon such as crosstalk, self turn-on, and self-sustained oscillation from happening. Conventional methods either slow down the circuit or increase the design complexity. I...
Published: 1/13/2017   |   Inventor(s): Yincan Mao, Zichen Miao, Khai Ngo, Chi Ming Wang
Keywords(s):  
Category(s): Electrical, Energy, Engineering, Transportation
Distributed Kelvin-Source Resistance to Reduce Dynamic Power/Current Imbalance in Paralleled Semiconductor Power Switches
Switching power devices, especially SiC MOSFETs, have wide parameter variations due to fabrication process. When putting several MOSFETs in parallel, there will be current/power unbalance during switching transient. Several publications have mentioned about using different control techniques to actively reduce the unbalance. However, these controls...
Published: 1/13/2017   |   Inventor(s): Yincan Mao, Zichen Miao, Khai Ngo, Chi Ming Wang
Keywords(s):  
Category(s): Electrical, Energy, Engineering, Transportation
Cooperative Positioning Using RF Pattern Matching
The present invention relates to telecommunications in general, and, more particularly, to a technique in which two or more wireless terminals cooperate to make measurements that assist in generating an estimate of their locations.
Published: 12/1/2016   |   Inventor(s): Reza Vaghefi, R. Michael Buehrer, Scot Gordon
Keywords(s):  
Category(s): Communication, Computer Hardware, Computer Software, Electrical, Energy, Engineering, Environment, Process/Procedures, Transportation
A Method of Capacitor Voltage Ripple Reduction by Controlling Modulation Index Together with 2nd Order Current Injection for Modular Multilevel Converter
In this invention, a method of capacitor voltage ripple reduction for modular multilevel converter is proposed. In conventional control of MMC, capacitor voltage ripples consist of fundamental component and 2nd order component. That is because the module input power contains fundamental power and 2nd order power. With power flow analysis, the physi...
Published: 4/11/2016   |   Inventor(s): Yadong Lyu, Yi-Hsun Hsieh, Fred Lee, Qiang Li
Keywords(s):  
Category(s): Electrical, Engineering, Transportation
Converter to Charge Battery from Multiple Sources
Disclosed is a converter that routes power among multiple input/output ports, and one application of the invention is to charge battery from multiple sources.
Published: 4/11/2016   |   Inventor(s): Khai Ngo, Shigeharu Yamagami
Keywords(s):  
Category(s): Electrical, Engineering, Transportation
A Portable Tuned Mass Damper with Simple Tuning/Design for the Reduction of Vibrations in Civil Engineering/Architectural Structures
This IP consists of a device called "Portable Tuned Mass Damper (PTMD)" which is designed to be compact, portable, and easily adjustable. All parts of the device are screwed to each other to facilitate the construction and assembly. It can be installed within a building floor plenum, architectural elements or can be placed at the desired location d...
Published: 1/25/2016   |   Inventor(s): Mehdi Setareh
Keywords(s):  
Category(s): Engineering, Environment, Devices, Consumer Products, Transportation
Secular Vehicular Data Dissemination System
The proposed invention is intended as a low-cost adaptation to modern vehicular data transfer, which commonly uses a shared data bus and protocols similar to token ring network topologies, where devices notionally take turns in reporting their information to the master controller on the shared bus prior to returning the token / permitting another s...
Published: 9/21/2015   |   Inventor(s): Alan Michaels, Michael Fowler, Joseph Ernst, William Headley
Keywords(s):  
Category(s): Transportation
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