Dong Le Phones & Addresses
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Sacramento, CA
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Ontario, CA
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Rancho Cordova, CA
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Glendale, CA
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Garden Grove, CA
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Santa Ana, CA
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3338 Irish Mist Way, Sacramento, CA 95826
Work
Position:
Administration/Managerial
Education
Degree:
Associate degree or higher
Emails
c***1@aol.com
Publications
Us Patents
Digital Motor Controller
View pageUS Patent:
53509889, Sep 27, 1994
Filed:
Jul 2, 1991
Appl. No.:
7/724647
Inventors:
Dong T. Le - Lakewood CA
Assignee:
AlliedSignal, Inc. - Morris Township, Morris County NJ
International Classification:
H02P 540
H02P 800
H02P 800
US Classification:
318618
Abstract:
A digital motor controller employs a digital signal processor to generate commutation commands that drive and brake a motor. The commutation commands are pulse width modulated. To avoid shoot-through, the digital signal processor automatically adjusts the widths of the pulses according to the amount of current being drawn by the motor. Motor speed is measured by taking the difference between consecutive samples from a position sensor and dividing the difference by the sampling time. The digital signal processor also closes position, speed and current loops. The commands provided by each loop are limited between upper and lower limits. Further, the digital signal processor automatically adjusts the upper and lower limits to compensate for changes in design characteristics due to variations in temperature. The digital motor controller can be used to control different motors having different design characteristics simply by reprogramming the upper and lower limits. A plurality of digital motor controllers can be used to control motors operating in tandem.
Ic Controller Chip For Brushless Dc Motors
View pageUS Patent:
52586960, Nov 2, 1993
Filed:
Jun 5, 1992
Appl. No.:
7/893864
Inventors:
Dong T. Le - Lakewood CA
Assignee:
Allied-Signal Inc. - Morris Township NJ
International Classification:
H02P 602
US Classification:
318254
Abstract:
An IC controller for a brushless motor includes commutation logic and an inverter on a single chip. The chip can also include an isolated power supply.
Fault Tolerant Controller Arrangement For Electric Motor Driven Apparatus
View pageUS Patent:
56708564, Sep 23, 1997
Filed:
Nov 7, 1994
Appl. No.:
8/335026
Inventors:
Dong Tuan Le - Lakewood CA
Colin E. Huggett - Torrance CA
Colin E. Huggett - Torrance CA
Assignee:
AlliedSignal Inc. - Morris Township NJ
International Classification:
G05B 902
US Classification:
318564
Abstract:
A fault tolerant controller arrangement for electric motor driven apparatus is implemented by a plurality of control channels, each of which includes a motor and associated drive circuitry. The implementation is such that the rating of each of the plurality of channels is reduced and all channels are operated such that the load is shared between all operating channels. The arrangement is such that all channels share the load dynamically and statically and that each channel in a system of n channels supplies. sup. 1 n of the required load driving force in the same direction.
Motor With Integral Controller
View pageUS Patent:
51592185, Oct 27, 1992
Filed:
Jul 9, 1991
Appl. No.:
7/727516
Inventors:
Roger P. Murry - Los Angeles CA
Dong T. Le - Los Angeles CA
Dong T. Le - Los Angeles CA
Assignee:
Allied-Signal Inc. - Morris Township, Morris County NJ
International Classification:
H02P 500
US Classification:
310 68B
Abstract:
A solid state controller is mounted directly to a permanent magnet, brushless DC motor. The controller operates the motor at constant torque and variable speed. Speed is determined in accordance with density of the through flow. The motor and controller can be employed to circulate fluid in a circulation loop having variable pressure.
Self-Diagnostics Within Power Electronics
View pageUS Patent:
20140117910, May 1, 2014
Filed:
Oct 29, 2012
Appl. No.:
13/663354
Inventors:
Dong Le - Lakewood CA, US
Liping Zheng - Buena Park CA, US
Liping Zheng - Buena Park CA, US
International Classification:
H02P 31/00
US Classification:
318490
Abstract:
This disclosure relates to diagnosing a power electronic device by itself and extending the diagnostics to an electric machine coupled with the power electronic device and deployed at an operational site. The power electronic device can power and control the electric machine. The diagnostics can include testing the status of the power electronic device, and monitoring hardware changes in the electric machine. The diagnostics can be performed within the power electronic device on demand, periodically, or both. In some instances, the self-diagnostics can evaluate whether components are defective or wired incorrectly, characterized by wrong inductance, and/or resistance, for example. In some implementations, the power electronic device includes a digital signal processing unit for the self-diagnostics and a data record system for recording and troubleshooting errors related to load performance and/or parameters.