Robert L Reese

US Patent:

D2694190, Jun 21, 1983

Filed:

Sep 30, 1980

Appl. No.:

6/192532

Inventors:

Thomas J. Umlauf - Hales Corners WI
Robert J. Reese - Wauwatosa WI

Assignee:

Central Engineering Co., Inc. - Milwaukee WI

International Classification:

D1208

US Classification:

D12 96

US Patent:

20220255421, Aug 11, 2022

Filed:

Feb 11, 2021

Appl. No.:

17/174072

Inventors:

- Mayfield Heights OH, US
Jatinkumar K. Patel - Thiensville WI, US
Rangarajan M. Tallam - Germantown WI, US
Robert W. Reese - Germantown WI, US

International Classification:

H02M 1/36
H02M 3/06
H02M 3/158

Abstract:

A switch mode power supply includes a bootstrap circuit, control circuits, and an auxiliary winding coupled to the bootstrap circuit and configured to supply power to the control circuits after startup of the power supply. The bootstrap circuit is configured to supply power to the control circuits during startup and includes an isolation circuit to limit current flow between the starting capacitor and the control circuits while the starting capacitor is charged to a starting voltage by the high voltage input. During the initial charge of the starting capacitor, the control circuits do not have power to provide the initial functionality of the power supply. Once the starting capacitor is charged to the starting voltage, the isolation circuit is activated to allow current flow that powers the control circuits during the remainder of the startup until the auxiliary winding is able to power the control circuits.

US Patent:

20180026544, Jan 25, 2018

Filed:

Oct 2, 2017

Appl. No.:

15/722071

Inventors:

- Mayfield Heights OH, US
Richard Lukaszewski - New Berlin WI, US
Rangarajan Tallam - Germantown WI, US
Lixiang Wei - Mequon WI, US
Lee Gettelfinger - Mequon WI, US
Garron Morris - Whitefish Bay WI, US
Bruce Weiss - Milwaukee WI, US
Neil Gollhardt - Fox Point WI, US
Navid R. Zargari - Cambridge, CA
William Brumsickle - Madison WI, US
Robert Wright Reese - Germantown WI, US
Stephen E. Denning - Silver Lake OH, US

Assignee:

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

International Classification:

H02M 5/458
H02P 27/06
H02M 1/08

Abstract:

Motor drive power conversion systems are provided including a rectifier and a switching inverter, wherein the switching devices of the rectifier, the inverter and/or of a DC/DC converter are silicon carbide switches, such as silicon carbide MOSFETs. Driver circuits are provided for providing bipolar gate drive signals to the silicon carbide MOSFETs, including providing negative gate-source voltage for controlling the off state of enhancement mode low side drivers and positive gate-source voltage for controlling the off state of enhancement mode high side drivers.

US Patent:

20150318791, Nov 5, 2015

Filed:

Apr 29, 2015

Appl. No.:

14/698925

Inventors:

- Mayfield Heights OH, US
Richard Lukaszewski - New Berlin WI, US
Rangarajan Tallam - Germantown WI, US
Lixiang Wei - Mequon WI, US
Lee Gettelfinger - Mequon WI, US
Garron Morris - Whitefish Bay WI, US
Bruce Weiss - Milwaukee WI, US
Neil Gollhardt - Fox Point WI, US
Navid R. Zargari - Cambridge, CA
William Brumsickle - Madison WI, US
Robert Wright Reese - Germantown WI, US
Stephen E. Denning - Silver Lake OH, US

Assignee:

Rockwell Automation Technologies, Inc. - Mayfield Heights OH

International Classification:

H02M 5/458
H02P 27/06

Abstract:

Motor drive power conversion systems are provided including a rectifier and a switching inverter, wherein the switching devices of the rectifier, the inverter and/or of a DC/DC converter are silicon carbide switches, such as silicon carbide MOSFETs. Driver circuits are provided for providing bipolar gate drive signals to the silicon carbide MOSFETs, including providing negative gate-source voltage for controlling the off state of enhancement mode low side drivers and positive gate-source voltage for controlling the off state of enhancement mode high side drivers.