Craig W Grupido

US Patent:

20140001832, Jan 2, 2014

Filed:

Jun 29, 2012

Appl. No.:

13/537236

Inventors:

Craig William Grupido - Brighton MI, US

Assignee:

LG Chem, Ltd. - Seoul

International Classification:

B60L 1/00
H01H 47/00

US Classification:

307 91, 361160

Abstract:

A driver circuit and a diagnostic method are provided. The driver circuit includes a first voltage driver, a second voltage driver, and a microprocessor. The microprocessor generates a first pulse width modulated signal to induce the first voltage driver to output a second pulse width modulated signal to energize a contactor coil. The microprocessor sets a first diagnostic flag equal to a first value if a first filtered voltage value is greater than a first threshold value. The microprocessor sets a second diagnostic flag equal to a second value if a first filtered current value is less than a threshold value. The microprocessor stops generating the first pulse width modulated signal to de-energize the contactor coil if the first and second diagnostic flags are set equal to the first and second values, respectively.

US Patent:

20140001833, Jan 2, 2014

Filed:

Jun 29, 2012

Appl. No.:

13/537510

Inventors:

Craig William Grupido - Brighton MI, US

Assignee:

LG CHEM, LTD. - Seoul

International Classification:

B60L 1/00

US Classification:

307 91

Abstract:

A driver circuit and a diagnostic method are provided. The driver circuit includes a first voltage driver, a second voltage driver, and a microprocessor. The microprocessor generates a first pulse width modulated signal to induce the first voltage driver to output a second pulse width modulated signal to energize a contactor coil. The microprocessor sets a first diagnostic flag equal to a first value if a first filtered voltage value is less than a first threshold value. The microprocessor sets a second diagnostic flag equal to a second value if a second filtered voltage value is greater than a second threshold value. The microprocessor stops generating the first pulse width modulated signal to de-energize the contactor coil if the first and second diagnostic flags are set equal to the first and second values, respectively.

US Patent:

20140002939, Jan 2, 2014

Filed:

Jun 29, 2012

Appl. No.:

13/537161

Inventors:

Craig William Grupido - Brighton MI, US

Assignee:

LG CHEM, LTD. - Seoul

International Classification:

H02H 7/00

US Classification:

361 911

Abstract:

A driver circuit and a diagnostic method are provided. The driver circuit includes a first voltage driver, a second voltage driver, and a microprocessor. The microprocessor generates a first pulse width modulated signal to induce the first voltage driver to output a second pulse width modulated signal to energize a contactor coil. The microprocessor sets a first diagnostic flag equal to a first value if a first filtered voltage value is greater than a first threshold value. The microprocessor sets a second diagnostic flag equal to a second value if a second filtered voltage value is greater than a second threshold value. The microprocessor stops generating the first pulse width modulated signal to de-energize the contactor coil if the first and second diagnostic flags are set equal to the first and second values, respectively.

US Patent:

20130221743, Aug 29, 2013

Filed:

Feb 29, 2012

Appl. No.:

13/408465

Inventors:

Craig William Grupido - Brighton MI, US

Assignee:

LG Chem, Ltd. - Seoul

International Classification:

B60L 1/00

US Classification:

307 91

Abstract:

A driver circuit and a diagnostic method are provided. The circuit includes a first voltage driver having a first output line electrically coupled to a main contactor coil of a main contactor. The circuit further includes a microprocessor that measures a first voltage on a first voltage feedback line if the main contactor coil is not energized. The microprocessor measures a second voltage on a second voltage feedback line if the main contactor coil is not energized. The microprocessor sets a status flag equal to a fault condition value if the first voltage is greater than a threshold voltage value. Also, the microprocessor sets the status flag equal to the fault condition value if the second voltage is greater than the threshold voltage value.