Jian Wen

US Patent:

6879053, Apr 12, 2005

Filed:

Oct 22, 2003

Appl. No.:

10/691030

Inventors:

Richard Shaun Welches - Amherst NH, US
Daniel P. Hohm - Nashua NH, US
Jian Wen - North Andover MA, US
Kevin E LeRow - Lowell MA, US
Richard Griessel - Derry NH, US
Thomas O'Reilly - Hollis NH, US

Assignee:

Youtility, Inc. - Hudson NH

International Classification:

H02P009/00

US Classification:

290 6, 290 1 A, 290 4 R, 290 31, 290 32, 290 36, 290 38 R, 322 24, 322 10, 322 12, 322 13, 322 20

Abstract:

The invention in the simplest form is an improved variable speed engine/generator set with an integrated power conditioning system and control method, used to generate high quality AC power with optimum fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.

US Patent:

6911260, Jun 28, 2005

Filed:

Jan 10, 2003

Appl. No.:

10/339849

Inventors:

Zhifen Ren - Newton MA, US
Jian Guo Wen - Newton MA, US
Jing Y. Lao - Chestnut Hill MA, US
Wenzhi Li - Brookline MA, US

Assignee:

Trustees of Boston College - Boston MA

International Classification:

B32B009/00

US Classification:

428408, 428323, 428364, 428367, 428368, 428402, 428698, 4234471, 423439, 427212, 4272491

Abstract:

The present invention relates generally to reinforced carbon nanotubes, and more particularly to reinforced carbon nanotubes having a plurality of microparticulate carbide or oxide materials formed substantially on the surface of such reinforced carbon nanotubes composite materials. In particular, the present invention provides reinforced carbon nanotubes (CNTs) having a plurality of boron carbide nanolumps formed substantially on a surface of the reinforced CNTs that provide a reinforcing effect on CNTs, enabling their use as effective reinforcing fillers for matrix materials to give high-strength composites. The present invention also provides methods for producing such carbide reinforced CNTs.

US Patent:

6969922, Nov 29, 2005

Filed:

Feb 25, 2005

Appl. No.:

11/065759

Inventors:

Richard Shaun Welches - New Boston NH, US
Daniel P. Hohm - Merrimack NH, US
Jian Wen - North Andover MA, US

Assignee:

Youtility, INC - Hudson NH

International Classification:

H02P009/00

US Classification:

290 1A, 290 40, 290 40 A, 290 40 C, 322 10, 322 12, 322 13, 322 20, 322 24

Abstract:

The invention in one embodiment is an improved variable speed engine/generator set with an integrated power conditioning system and control method including load shedding to generate high quality AC power with improved fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.

US Patent:

7147966, Dec 12, 2006

Filed:

Nov 27, 2002

Appl. No.:

10/305804

Inventors:

Zhifeng Ren - Newton MA, US
Jian Wen - Newton MA, US
Jinghua Chen - Chestnut Hill MA, US
Zhongping Huang - Belmont MA, US
Dezhi Wang - Wellesley MA, US

Assignee:

The Trustees of Boston College - Chestnut Hill MA

International Classification:

H01M 4/02
H01M 4/96
B05D 5/12
C25B 11/12

US Classification:

429209, 429 40, 4292318, 977857, 977742, 977948, 427113, 204294

Abstract:

The present invention provides conductive carbon nanotube (CNT) electrode materials comprising aligned CNT substrates coated with an electrically conducting polymer, and the fabrication of electrodes for use in high performance electrical energy storage devices. In particular, the present invention provides conductive CNTs electrode material whose electrical properties render them especially suitable for use in high efficiency rechargeable batteries. The present invention also provides methods for obtaining surface modified conductive CNT electrode materials comprising an array of individual linear, aligned CNTs having a uniform surface coating of an electrically conductive polymer such as polypyrrole, and their use in electrical energy storage devices.

US Patent:

7442284, Oct 28, 2008

Filed:

Nov 9, 2006

Appl. No.:

11/595561

Inventors:

Zhifeng Ren - Newton MA, US
Jian Wen - Newton MA, US
Jinghua Chen - Chestnut Hill MA, US
Zhongping Huang - Belmont MA, US
Dezhi Wang - Wellesley MA, US

Assignee:

The Trustees of Boston College - Chestnut Hill MA

International Classification:

H01M 4/66

US Classification:

205159, 205317, 204294

Abstract:

The present invention provides conductive carbon nanotube (CNT) electrode materials comprising aligned CNT substrates coated with an electrically conducting polymer, and the fabrication of electrodes for use in high performance electrical energy storage devices. In particular, the present invention provides conductive CNTs electrode material whose electrical properties render them especially suitable for use in high efficiency rechargeable batteries. The present invention also provides methods for obtaining surface modified conductive CNT electrode materials comprising an array of individual linear, aligned CNTs having a uniform surface coating of an electrically conductive polymer such as polypyrrole, and their use in electrical energy storage devices.

US Patent:

7442414, Oct 28, 2008

Filed:

Nov 12, 2004

Appl. No.:

10/987257

Inventors:

Zhifen Ren - Newton MA, US
Jian Guo Wen - Newton MA, US
Jing Y. Lao - Chestnut Hill MA, US
Wenzhi Li - Brookline MA, US

Assignee:

The Trustees of Boston College - Chestnut Hill MA

International Classification:

C23C 16/22

US Classification:

4272491, 4272493, 4272495, 427250, 264642, 264682

Abstract:

Methods for producing reinforced carbon nanotubes having a plurality of microparticulate carbide or oxide materials formed substantially on the surface of such reinforced carbon nanotubes composite materials are disclosed. In particular, the present invention provides reinforced carbon nanotubes (CNTs) having a plurality of boron carbide nanolumps formed substantially on a surface of the reinforced CNTs that provide a reinforcing effect on CNTs, enabling their use as effective reinforcing fillers for matrix materials to give high-strength composites. The present invention also provides methods for producing such carbide reinforced CNTs.

US Patent:

20020036430, Mar 28, 2002

Filed:

Sep 28, 2001

Appl. No.:

09/966241

Inventors:

Richard Welches - Amherst NH, US
Richard Griessel - Derry NH, US
Jian Wen - North Andover MA, US

International Classification:

H02J003/00

US Classification:

307/018000

Abstract:

The invention in the simplest form is a system for managing distributed power sources connected to a power grid. The present invention manages power flow to/from the power grid whether for a stand-alone power sourece or for local area utility grid or microgrid. When two or more power sources are interconnected by the local grid, each source has a power conditioning unit and a circuit breaker manager for controlling and regulating the electric flow to/from the grid. The individual power sources are able to independently draw power from the grid when required without extensive master control schemes. In a preferred embodiment the power sources are reformer equipped fuel cells and the heat from the fuel cell is used as a heat source for efficiency.

US Patent:

20040084965, May 6, 2004

Filed:

Oct 22, 2003

Appl. No.:

10/691357

Inventors:

Richard Welches - Amherst NH, US
Daniel Hohm - Nashua NH, US
Jian Wen - North Andover MA, US
Kevin LeRow - Lowell MA, US
Richard Griessel - Derry NH, US

International Classification:

H02J007/00

US Classification:

307/064000

Abstract:

The invention in the simplest form is an improved hybrid power converter with uninterruptible power supply (UPS) and power quality capabilities as well as an integrated variable speed power source and control method that is used to generate high quality, uninterruptible AC power utilizing fewer batteries and operating at optimum fuel efficiency and with reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of a power source such as an engine and generator. The transformerless hybrid power converter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single-phase or unbalanced loading. The transformerless hybrid power converter also provides inline or offline UPS capability, line voltage and/or frequency sag and surge compensation, peak shaving capability, VAR compensation and active harmonic filtering.