Patents by Inventor Hung D. Vu

Hung D. Vu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170287014
    Abstract: An automated direct response advertising system can include: collecting information of a consumer; routing and matching the consumer to an offer of a product; providing content to the consumer with a reusable page, reusable page components, reusable multi-tenant components, and white-labeling components; requesting contact information from the consumer; requesting billing information from the consumer; providing a cross-sell offer for complimentary products of the product; providing an up-sell offer for upgrades to the product; aggregating information within an advanced analytics module; and displaying the information from the advanced analytics module on a display.
    Type: Application
    Filed: April 1, 2017
    Publication date: October 5, 2017
    Inventors: Hung D. Vu, Peter Nguyen, Jay D. Bose, Tom Furukawa, Andrew Puchalski, Justin Durham, James Durham, Daniel Eichler, James Nguyen, Matthew P.H. Kam, Kayvan Fayazkhah, Brendan Paul, Dong Derek Nguyen
  • Patent number: 8810187
    Abstract: A stepper motor system and apparatus use a position-feedback device, which may have a resolution capability as low as 200 counts per motor shaft revolution, for misstep detection and motor step recovery. In use of the system, position deviation is computed periodically and cyclically, by subtracting the feedback position from the corresponding commanded position, to determine the load angle, implicitly, and the operating status of the motor. If the load angle is within an established allowable range of values, normal stepper operation along the programmed trajectory is maintained, without adjustment. A load angle that exceeds the limits of that range however indicates that a misstep has occurred, and the system controller initiates immediate action to recover lost motor steps, to reestablish synchronism, and to then continue toward the final target position, with minimal loss of time.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: August 19, 2014
    Assignee: Oriental Motor Boston Technology Group Incorporated
    Inventor: Hung D. Vu
  • Publication number: 20130043822
    Abstract: A stepper motor system and apparatus use a position-feedback device, which may have a resolution capability as low as 200 counts per motor shaft revolution, for misstep detection and motor step recovery. In use of the system, position deviation is computed periodically and cyclically, by subtracting the feedback position from the corresponding commanded position, to determine the load angle, implicitly, and the operating status of the motor. If the load angle is within an established allowable range of values, normal stepper operation along the programmed trajectory is maintained, without adjustment. A load angle that exceeds the limits of that range however indicates that a misstep has occurred, and the system controller initiates immediate action to recover lost motor steps, to reestablish synchronism, and to then continue toward the final target position, with minimal loss of time.
    Type: Application
    Filed: August 9, 2012
    Publication date: February 21, 2013
    Inventor: Hung D. VU
  • Patent number: 7199496
    Abstract: The heat-generating components of an integrated motor system are disposed proximate the motor body, for efficient heat dissipation, and the heat-sensitive components are segregated therefrom, physically and thermally.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: April 3, 2007
    Assignee: Oriental Motor Boston Technology Group Incorporated
    Inventors: Seiki Suzuki, Yasuo Sato, Akihiko Hoda, Chikara Sugawara, Yoshinari Araki, Eiji Oi, Hung D. Vu
  • Patent number: 6548977
    Abstract: An electronic circuit and software control methodology tracks motor position in a motor drive system. High power consumption position transducers, such as inductive sensors or optical encoders, can be controlled in a variable active duty cycle mode to reduce power and yet maintain motor position information while the main power is off. A lower power battery backup circuit is implemented as a secondary power source, and is automatically brought in operation when the main power supply is disabled. A dedicated control circuit operates during AC power outages, and the circuit average power can be controlled to a minimal rate, based on the rate of change of motor position. The motor can be externally driven, up to a defined limit speed, without losing its actual position information.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: April 15, 2003
    Assignee: Seiberco Incorporated
    Inventors: Hung D. Vu, Ralph W. Horber
  • Publication number: 20030020421
    Abstract: An electronic circuit and software control methodology tracks motor position in a motor drive system. High power consumption position transducers, such as inductive sensors or optical encoders, can be controlled in a variable active duty cycle mode to reduce power and yet maintain motor position information while the main power is off. A lower power battery backup circuit is implemented as a secondary power source, and is automatically brought in operation when the main power supply is disabled. A dedicated control circuit operates during AC power outages, and the circuit average power can be controlled to a minimal rate, based on the rate of change of motor position. The motor can be externally driven, up to a defined limit speed, without losing its actual position information.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 30, 2003
    Inventors: Hung D. Vu, Ralph W. Horber
  • Patent number: 5844393
    Abstract: The stepper motor controller, implemented as computer software, converts each input pulse into many internal pulses, which internal pulses are used for calculating a command angle during each sampling time interval of operation. The values of the angle commands may vary, from interval to interval, as a function of the input pulse train rate (i.e., the number of new pulses input per interval). The system accesses an internal look-up table to convert vector data into torque values, for driving the motor; if the input pulse rate is sufficiently high to warrant doing so, the look-up table data can be accessed out of sequence.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 1, 1998
    Inventor: Hung D. Vu
  • Patent number: 5838122
    Abstract: Phase alignment and initialization of a polyphase brushless DC motor are achieved, at standstill, by noting amplitude changes in signals from integral feedback coils while phase coils of the motor, magnetically coupled to the sensor coils, are energized at non-torque producing commutation angles.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: November 17, 1998
    Assignee: Seiberco Incorporated
    Inventor: Hung D. Vu
  • Patent number: 5329195
    Abstract: A polyphase brushless DC motor has an integral automatic feedback arrangement affording excellent accuracy and a high degree of magnetic balance. The stator pole elements of the motor are identical and equidistantly spaced, and each is wound with two coils. One coil on each pole element comprises sensor circuitry; the other comprises power circuitry. As a result, all pole elements of the stator are utilized both to produce rotor drive torque and also to generate electrical signals that provide highly accurate rotor-position information.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: July 12, 1994
    Assignee: Seiberco Incorporated
    Inventors: Ralph W. Horber, Hung D. Vu