Gm Global Technolgoy Operations, Inc.

Michael Z Pieszala

Yilun Luo

Khorshed Mohammed Alam

Benjamin S Ngu

Chandra S Namuduri

Brian A Welchko

Sanjeev Manubhai Naik

Rashmi Prasad

Mohammad N Anwar

Hong Wai Nguyen

A variable slew rate gate drive system for powering an electric machine. The system may include a gate driver operable for controlling each of a plurality of hybrid switch power modules between opened and closed states to facilitate powering the electric machine. The gate driver may be operable for selecting slew rates and controlling ON and OFF states of first and second semiconductor switches included as part of each power module to optimize powering of the electric machine by varying the slew rates as a function of performance characteristics of the first and second semiconductor switches.

Variable slew rate gate driver for hybrid switch power module

A variable current gate driver for a transistor includes a first current control device having a first controllable output current. The first current control device is electrically connected between a first bus and an activator of the transistor, and a second current control device having a second controllable output current. The second current control device is electrically connected between the activator of the transistor and a second bus. A controller is operatively connected to the first and second current control devices to control the first and second controllable output currents to control the first and second current control devices to control activation of the transistor via the activator. The controller is operative to control the first and second current control devices to control a slew rate of the transistor.

Variable current gate driver and system

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Kathleen, GA, United States of America

Michael Z Pieszala