Syed Jaffreyal Kadry

US Patent:

20170256971, Sep 7, 2017

Filed:

Mar 3, 2016

Appl. No.:

15/059961

Inventors:

- Detroit MI, US
Mohammad N. Anwar - Van Buren Township MI, US
Ahmad Albanna - Dearborn Heights MI, US
Syed M. Kadry - Grand Blanc MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H02J 7/00

Abstract:

A discharge circuit for a high-voltage bus that is electrically connected to a high-voltage DC power source is described. The discharge circuit includes a discharge switch electrically connected in series with a discharge resistor between positive and negative conductors of the high-voltage bus, and the discharge switch includes a gate. A bi-stable switch includes a control gate, an input line that is electrically connected to the high-voltage bus and an output line that is electrically connected to the gate of the discharge switch. A trigger device is in communication with the control gate of the bi-stable switch. The input line of the bi-stable switch is electrically connected to the high-voltage bus, and the discharge switch is controllable to a closed state to provide an electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal.

US Patent:

20170256972, Sep 7, 2017

Filed:

Mar 3, 2016

Appl. No.:

15/059979

Inventors:

- Detroit MI, US
Mohammad N. Anwar - Van Buren Township MI, US
Ahmad Albanna - Dearborn Heights MI, US
Syed M. Kadry - Grand Blanc MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H02J 7/00

Abstract:

A power inverter including a multi-phase inverter circuit is electrically connected to a high-voltage DC power source, and includes a capacitor electrically connected between positive and negative conductors of a high-voltage bus. A normally-ON discharge switch is electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus. The discharge switch includes a control gate, wherein the control gate of the discharge switch is in communication with an ignition switch. The discharge switch is controllable to an open state between the positive and negative conductors of the high-voltage bus when the ignition switch is in an ON state. The discharge switch achieves a closed state to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus when the ignition switch is in an OFF state.

US Patent:

20170257039, Sep 7, 2017

Filed:

Mar 3, 2016

Appl. No.:

15/059971

Inventors:

- Detroit MI, US
Mohammad N. Anwar - Van Buren Township MI, US
Ahmad Albanna - Dearborn Heights MI, US
Syed M. Kadry - Grand Blanc MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H02M 7/537
H02P 27/06

Abstract:

A power inverter includes a multi-phase inverter circuit electrically connected to positive and negative conductors of the high-voltage bus. A bi-stable switch is electrically connected in series with a discharge resistor between the positive and negative conductors of the high-voltage bus, and a capacitor is electrically connected between the positive and negative conductors of the high-voltage bus. First and second trigger circuits are in communication with a gate of the bi-stable switch, and first and second contactors are controllable to electrically connect a respective one of the positive and negative conductors of the high-voltage bus to the high-voltage DC power source. The bi-stable switch is controllable to provide a low-impedance electric current flow path through the discharge resistor between the positive and negative conductors of the high-voltage bus in response to an activation signal from one of the first and second high-voltage DC contactor circuits.

US Patent:

20170214258, Jul 27, 2017

Filed:

Jan 27, 2016

Appl. No.:

15/007688

Inventors:

- Detroit MI, US
Mohammad N. Anwar - Van Buren Township MI, US
Syed M. Kadry - Grand Blanc MI, US
Ahmad Albanna - Dearborn Heights MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H02J 7/00
H02H 3/20

Abstract:

A disconnect architecture for use with a system having a battery pack and positive and negative bus rails includes a mid-pack low-power (LP) relay, a fuse, semiconductor switches, and a sequencer circuit. The mid-pack LP relay is positioned between the rails at a mid-stack point of the battery pack, and divides a voltage across the battery pack when commanded open. The fuse is positioned between the mid-pack LP relay and the positive bus rail, and opens in response to a dead short condition of the system. The semiconductor switches are positioned in electrical parallel with the mid-pack LP relay. The sequencer circuit selectively turns on the semiconductor switches and thereby coordinates a flow of electrical current through the semiconductor switches and the mid-pack LP relay in response to a detected partial short condition of the system. A system includes the battery pack, bus rails, and disconnect architecture.