Charles F Blair

US Patent:

6700351, Mar 2, 2004

Filed:

Feb 20, 2001

Appl. No.:

09/789099

Inventors:

Charles F. Blair - Powell OH
Mark Gabel - Dublin OH
Christopher Crawford - Dublin OH
Dennis Weber - Worthington OH
John R. Birchmeier - Columbus OH
Brad Reinbolt - Columbus OH

Assignee:

Liebert Corporation - Columbus OH

International Classification:

H01M 1246

US Classification:

320125

Abstract:

A modular uninterruptible power supply is disclosed, which provides complete redundancy for all components required for UPS operation. Novel aspects of the invention include design of the modules and their interconnection and interoperability, as well as improved operation techniques applicable to UPS systems generally.

US Patent:

7453235, Nov 18, 2008

Filed:

Feb 11, 2004

Appl. No.:

10/708149

Inventors:

Charles F Blair - Powell OH, US
Mark Gabel - Dublin OH, US
Christopher Crawford - Dublin OH, US
Dennis Weber - Worthington OH, US
John R Birchmeier - Columbus OH, US
Brad Reinbolt - Columbus OH, US

Assignee:

Liebert Corporation - Columbus OH

International Classification:

H01M 10/44
H01M 10/46

US Classification:

320116

Abstract:

A modular uninterruptible power supply is disclosed, which provides complete redundancy for all components required for UPS operation. Novel aspects of the invention include design of the modules and their interconnection and interoperability, as well as improved operation techniques applicable to UPS systems generally.

US Patent:

20160336796, Nov 17, 2016

Filed:

May 10, 2016

Appl. No.:

15/151167

Inventors:

- Columbus OH, US
Charles F. BLAIR - Powell OH, US
Gregg J. NELSON - Delaware OH, US

International Classification:

H02J 9/06

Abstract:

The present disclosure relates to a load sharing system having a plurality of power supplies for powering a plurality of corresponding loads. Each one of the power supplies is associated with at least one of the loads. A power bus is also provided. A plurality of inductors is connected to the power bus. Each one of the inductors is further connected to at least one of the loads and to at least one of the power supplies, such that each adjacent pair of the inductors is connected in parallel relative to at least one of the loads. Each of the inductors has an inductance value sufficient so that if a fault develops on the power bus it serves to isolate the power supplies from the power bus. The inductance value further is such that if any one of the power supplies fails, the specific pair of inductors coupled in parallel to the load associated with the failed power supply allows the load to draw power over the power bus from other ones of the power supplies through the specific pair of inductors.

US Patent:

20160282390, Sep 29, 2016

Filed:

Mar 21, 2016

Appl. No.:

15/075535

Inventors:

- Columbus OH, US
Terry D. BUSH - Westerville OH, US
Charles F. BLAIR - Powell OH, US

International Classification:

G01R 19/06
G01R 19/02

Abstract:

A real current meter reads current from a current probe coupled around power lines of a transformer-based UPS system coupled to a transformer having a high resistance ground with a HRG resistance and determines a real current component of the current read from the current probe.

US Patent:

20160094209, Mar 31, 2016

Filed:

Sep 11, 2015

Appl. No.:

14/851295

Inventors:

- Columbus OH, US
Charles DUNN - Worthington OH, US
James MILLER - Fredericktown OH, US
Charles F. BLAIR - Powell OH, US

Assignee:

LIEBERT CORPORATION - Columbus OH

International Classification:

H03K 5/003
H03K 17/74

Abstract:

A DC offset voltage in an AC input voltage to a transformer and associated saturation current are eliminated by the placement of an anti-parallel diode pair circuit in series between a source of the AC input voltage and a primary winding of the transformer. The anti-parallel diode pair circuit has an input coupled to an output by parallel connected oppositely biased branch diode circuits. Each branch diode circuit has at least one diode where the diode of one such branch diode circuit is biased in one direction and the diode of the other such branch diode circuit is biased in an opposite direction and each branch diode circuit has the same number of diodes as the other branch diode circuit.

US Patent:

20150244206, Aug 27, 2015

Filed:

Feb 6, 2015

Appl. No.:

14/615814

Inventors:

- Columbus OH, US
Terry D. BUSH - Westerville OH, US
Brian P. HEBER - Delaware OH, US
Charles F. BLAIR - Powell OH, US

Assignee:

LIEBERT CORPORATION - Columbus OH

International Classification:

H02J 9/00
H02M 7/42

Abstract:

A common mode choke in a 3-wire transformer free UPS system with which different rectifier and bypass power sources are used is eliminated by using different types of PWM control depending on whether the inverter is paralleled with the bypass power source. When the inverter is paralleled with the bypass power source, a type of PWM control is used that does not have common mode voltage injection. When the inverter is not paralleled with the bypass power source, a type of PWM control is used that has common mode voltage injection. In an aspect, the PWM control that does not have common mode voltage injection is sine-triangle PWM and the PWM control that has common mode voltage injection is space-vector PWM.

Address:

1921 Pleasant Dr, Dallas, TX 75217

VIN:

1MDCDYJ1X7A350444

Make:

Lincoln

Model:

Continental 4dr Sedan Si

Year:

2007

Author:

Charles E. Blair

ISBN #:

0802402100

Author:

Charles E. Blair

ISBN #:

0892213469

Author:

Charles Blair

ISBN #:

0842379975