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Guohui Yuan

from Potomac, MD
Age ~57
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Also known as:
Guo Hui Yuan, Yuan Guohui, Gouhui Yuan, Guo-Hui Yuan, Hui Yuan Guo, Yuan Gouhui, Yuan Guo-Hui
Phone and address:
9413 Kentsdale Dr, Rockville, MD 20854
Related to:
Yuan Li, 60Yuan J Tsai, 53Su Yuan, 47Hao WuKuo K Wu, 55
Connected to:
Alice H Yuan, 64Arthur Yuan, 45Beisi Yuan, 35Brenda Yuan, 38Charlotte J Yuan, 30Claire H Yuan, 28Courtney M Yuan, 41Daniel J Yuan, 62Donglei Yuan, 56Edwin C Yuan, 32

Guohui Yuan Phones & Addresses

  • 9413 Kentsdale Dr, Potomac, MD 20854
  • Rockville, MD
  • 440 Ridge Rd, Greenbelt, MD 20770 (301) 220-3026
  • 440 Ridge Rd #8, Greenbelt, MD 20770 (301) 220-3026
  • 903 Main St, Gaithersburg, MD 20878 (301) 330-1924 (301) 353-1201
  • Germantown, MD
  • Adelphi, MD

Publications

Us Patents

Adaptive Control Of Motor Stator Current Waveform Profiles

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US Patent:
6919700, Jul 19, 2005
Filed:
Jan 29, 2003
Appl. No.:
10/353083
Inventors:
Boris A. Maslov - Reston VA, US
Matthew G. Feemster - Severna Park MD, US
Guohui Yuan - Greenbelt MD, US
Assignee:
Wavecrest Laboratories, LLC - Dulles VA
International Classification:
H02P029/00
US Classification:
318439, 318138, 318254, 318724, 310259, 310216
Abstract:
Subject to user or system selection, one of the motor control schemes is accessed from the memory by a controller for implementation. The controller generates control signals that are applied to energization circuitry for supplying current to the phase windings with a particular current waveform profile in accordance with the selected motor control scheme. The controller has an input terminal for receiving a user initiated torque command signal representing a desired motor torque. Each motor control scheme provides motor driving current that corresponds to torque command signals received at the controller input terminal.

Motor Control System For Dynamically Changing Motor Energization Current Waveform Profiles

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US Patent:
6940242, Sep 6, 2005
Filed:
Jan 29, 2003
Appl. No.:
10/353075
Inventors:
Boris A. Maslov - Reston VA, US
Matthew G. Feemster - Severna Park MD, US
Guohui Yuan - Greenbelt MD, US
Assignee:
Wavecrest Laboratories, LLC - Dulles VA
International Classification:
H02P029/00
US Classification:
318439, 318138, 318254, 318724, 310259, 310216
Abstract:
A control system is provided for a multiphase motor having a plurality of stator phase components, each stator phase component comprising a phase winding formed on a core element, and a rotor. A plurality of motor control schemes are stored in memory or calculated dynamically during motor operation. Subject to user or system selection, one of the motor control schemes is selected by a controller for implementation. The controller generates control signals that are applied to energization circuitry for supplying current to the phase windings with a particular current waveform profile in accordance with the selected motor control scheme. The controller has an input terminal for receiving a user initiated torque command signal representing a desired motor torque. Each motor control scheme provides motor driving current that corresponds to torque command signals received at the controller input terminal. In an automatic mode, the controller accesses the appropriate control scheme to meet the torque tracking requirements of the system.

Fault-Tolerant Electric Motor Control System

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US Patent:
6949908, Sep 27, 2005
Filed:
Oct 6, 2003
Appl. No.:
10/678133
Inventors:
Boris A. Maslov - Reston VA, US
Guohui Yuan - Gaithersburg MD, US
Assignee:
Wavecrest Laboratories, LLC - Dulles VA
International Classification:
H02P001/24
US Classification:
318727, 318434, 318439, 318801
Abstract:
The present invention offers a novel control system for a multiphase motor. The control system involves energization circuitry for energizing each phase winding, and a control circuit for defining phase currents for individual phases of the motor to generate control signals applied to the energization circuitry for energization of the phase windings. When at least one phase of the motor fails, a mode selection circuit enables the control circuit to operate either in a non-correction mode or in a fault-correction mode. In the non-correction mode of operation, phase currents for phases that remain operational are maintained unmodified. In the fault-correction mode, the phase currents for the remaining phases are modified in accordance with pre-set parameters.

Electric Vehicle With Adaptive Cruise Control System

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US Patent:
7197390, Mar 27, 2007
Filed:
Mar 13, 2003
Appl. No.:
10/386599
Inventors:
Guohui Yuan - Greenbelt MD, US
Boris Maslov - Reston VA, US
Assignee:
Wavecrest Laboratories LLC - Rochester Hills MI
International Classification:
B60T 7/12
G05D 1/00
G06F 17/00
G06F 7/00
US Classification:
701 93, 701 22, 701 70, 318437, 318685, 363 17
Abstract:
A novel system for adaptively controlling an electric vehicle to maintain desired speed under variable driving conditions. The system includes a control circuit for producing a control signal to control an electric motor of the vehicle. The control signal is formed based on a control current required to achieve the desired speed. The control strategy selection circuit is configured in the system to determine a motor control scheme that provides an appropriate waveform profile of the control current.

Adaptive System For Optimizing Excitation Current Waveform Profiles For Electric Motors

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US Patent:
7312592, Dec 25, 2007
Filed:
Apr 26, 2004
Appl. No.:
10/831102
Inventors:
Boris A. Maslov - Reston VA, US
Guohui Yuan - Gaithersburg MD, US
International Classification:
H02P 7/00
US Classification:
318432, 318254, 318138, 318439, 318700
Abstract:
An adaptive control system for an electric motor has energization circuitry connected to phase windings of the motor for energization thereof and a controller for generating a control signal corresponding to a profile of an excitation current. The control signal is applied to the energization circuitry to control energization of the phase windings. The energization circuitry provides the excitation current to the phase windings from a power supply. For a present combination of torque and speed, the controller adaptively determine the profile of the excitation current optimal for achieving a particular motor control objective. Excitation current profiles may be optimized to achieve maximum efficiency, maximum torque, minimum torque ripple, minimum core loss, etc.

Phase Advance Angle Optimization For Brushless Motor Control

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US Patent:
7436139, Oct 14, 2008
Filed:
Jan 29, 2003
Appl. No.:
10/353067
Inventors:
Boris A. Maslov - Reston VA, US
Matthew G. Feemster - Severna Park MD, US
Guohui Yuan - Greenbelt MD, US
Assignee:
Matra Manufacturing & Services SAS - Elancourt
International Classification:
H02K 23/02
US Classification:
318437, 31840001, 31840007, 31840009, 31840014, 31840015
Abstract:
A control system for a multiphase permanent magnet motor having a controller for producing a control signal to energize each phase winding. The controller includes a current value calculator for determining a value of phase current advanced in phase with respect to back-EMF by a phase advance angle, and a phase advance optimization circuit for producing a value of the phase advance angle optimized so as to maximize output torque of the motor and mimimize the phase current. The phase advance optimization circuit determines the phase advance angle optimized for each phase of the motor.

Precision Adaptive Motor Control In Cruise Control System Having Various Motor Control Schemes

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US Patent:
20040222762, Nov 11, 2004
Filed:
May 8, 2003
Appl. No.:
10/431430
Inventors:
Boris Maslov - Reston VA, US
Guohui Yuan - Greenbelt MD, US
Assignee:
WAVECREST LABORATORIES, LLC
International Classification:
H02K023/16
H02K023/18
H02K023/44
H02K037/00
US Classification:
318/437000
Abstract:
A novel cruise control system is provided for adaptively controlling an electric vehicle to maintain desired speed under variable driving conditions. This system utilizes multiple motor control scheme for controlling the motor using various waveform profiles of the control current, and involves phase advance angle adjustment provided for adaptively controlling a phase advance angle between the control current and back-EMF in response to changes in driving conditions to produce the control current sufficient to achieve the desired speed. A motor control scheme selection circuit enables the cruise control system to select a current waveform profile appropriate for present driving conditions. A selected current waveform profile is modified, if the control current with the adjusted phase advance angle is not sufficient to achieve the desired speed.

Software-Based Adaptive Control System For Electric Motors And Generators

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US Patent:
20050046375, Mar 3, 2005
Filed:
Dec 17, 2003
Appl. No.:
10/736791
Inventors:
Boris Maslov - Reston VA, US
John Salatino - Dulles VA, US
Guohui Yuan - Gaithersburg MD, US
International Classification:
H02P005/06
US Classification:
318650000
Abstract:
A control system for motors, generators and other electric machines that improves machine performance by dynamically adapting to changes. These changes may be in user inputs, machine operating conditions and/or machine operating parameters. The control system can take advantage of more independent machine parameters. That gives greater freedom to optimize and allows motors and generators to perform better than bigger, heavier machines, particularly more efficiently. The control system is software-based. So standard interfaces allow the control system to be improved and updated without changing hardware. This adaptive control system improves performance in a wide variety of motor and generator applications, particularly those that need high efficiency over varying conditions.
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Guohui Yuan from Potomac, MD, age ~57 Get Report