Michael John Robillard

US Patent:

7298167, Nov 20, 2007

Filed:

Jun 24, 2005

Appl. No.:

11/166822

Inventors:

Timothy Dorr - North Attleboro MA, US
Michael N. Robillard - Shrewsbury MA, US
Louise Schwabe - Sterling MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G01R 31/36
G01R 31/26
G01R 31/00
G01R 19/00

US Classification:

324771, 324767, 324522, 702 58, 702 64

Abstract:

A system for detecting a fault in a power supply having at least one power supply unit and a redundant power supply unit. The system includes a printed circuit board and a common voltage bus disposed on the printed circuit board. A plurality of diodes is disposed on the printed circuit board having first electrodes connected to the common voltage supply bus. The diodes have second electrodes connected to a corresponding one of the at least one power supply unit and the redundant power supply unit. The diodes are connected to the common bus in a logic OR configuration. A controller, disposed on the printed circuit board, is fed by a voltage at the second electrode of a corresponding one of the diodes and a reference voltage for determining whether the voltage at the second electrode of the corresponding one of the diodes is producing a predetermined voltage relative to the reference voltage.

US Patent:

7988063, Aug 2, 2011

Filed:

Jun 30, 2008

Appl. No.:

12/165220

Inventors:

Daniel Savilonis - Brookline MA, US
John Kevin Bowman - Brighton MA, US
John V Burroughs - East Sandwich MA, US
Michael Robillard - Shrewsbury MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

F24F 7/00
H02B 1/00
G06F 1/00

US Classification:

236 493, 361678, 36167946, 36167948

Abstract:

A system having: a midplane having air flow channels therein; a disk drive mounted to a first side of the midplane; and a temperature sensors mounted to the midplane. The system includes a pair of electrical chassis connected to a second side of the midplane. A first one of the chassis has therein: a fan; and a fan controller for controlling speed of the fan in response to a temperature control signal. A second one of the chassis has therein: a microprocessor for: detecting temperature signals produced by the temperature sensors; comparing differences between the detected temperature signals; and selecting one of the detected temperature control signal from the compared differences as the temperature control signal. A faulty one of the temperature sensors is detected by: selecting one of the detected temperature control signal as the faulty one of the plurality of temperature sensors from the compared differences.

US Patent:

20110290894, Dec 1, 2011

Filed:

Jul 11, 2011

Appl. No.:

13/180341

Inventors:

Daniel Savilonis - Brookline MA, US
John Kevin Bowman - Brighton MA, US
John V. Burroughs - East Sandwich MA, US
Michael Robillard - Shrewsbury MA, US

International Classification:

F24F 7/00
G06F 1/20

US Classification:

236 493

Abstract:

A system having: a midplane having air flow channels therein; a disk drive mounted to a first side of the midplane; and a temperature sensors mounted to the midplane. The system includes a pair of electrical chassis connected to a second side of the midplane. A first one of the chassis has therein: a fan; and a fan controller for controlling speed of the fan in response to a temperature control signal. A second one of the chassis has therein: a microprocessor for: detecting temperature signals produced by the temperature sensors; comparing differences between the detected temperature signals; and selecting one of the detected temperature control signal from the compared differences as the temperature control signal. A faulty one of the temperature sensors is detected by: selecting one of the detected temperature control signal as the faulty one of the plurality of temperature sensors from the compared differences.