Patents by Inventor Ge-Wei Lee

Ge-Wei Lee 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).

  • Sensorless commutation circuit and sensorless driving apparatus for brushless motor
    Patent number: 8786224
    Abstract: A sensorless commutation circuit and sensorless driving apparatus for a brushless motor includes a voltage divided unit, a control signal output unit, a switch unit and a comparison unit. The voltage divided unit outputs a voltage divided signal according to a phase voltage signal of the brushless motor. The control signal output unit outputs a filter control signal, wherein the filter control signal has a same switching cycle as a pulse width modulation control signal that drives the brushless motor. The switch unit is coupled to the control signal output unit and the voltage divided unit, and outputs a comparison signal according to the filter control signal and the voltage divided signal. The comparison unit is coupled to the switch unit, and outputs a correct commutation signal according to the comparison signal.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: July 22, 2014
    Assignee: I-Shou University
    Inventors: Chii-Maw Uang, Zu-Sheng Ho, Ge-Wei Lee
  • SENSORLESS COMMUTATION CIRCUIT AND SENSORLESS DRIVING APPARATUS FOR BRUSHLESS MOTOR
    Publication number: 20130207580
    Abstract: A sensorless commutation circuit and sensorless driving apparatus for a brushless motor includes a voltage divided unit, a control signal output unit, a switch unit and a comparison unit. The voltage divided unit outputs a voltage divided signal according to a phase voltage signal of the brushless motor. The control signal output unit outputs a filter control signal, wherein the filter control signal has a same switching cycle as a pulse width modulation control signal that drives the brushless motor. The switch unit is coupled to the control signal output unit and the voltage divided unit, and outputs a comparison signal according to the filter control signal and the voltage divided signal. The comparison unit is coupled to the switch unit, and outputs a correct commutation signal according to the comparison signal.
    Type: Application
    Filed: August 15, 2012
    Publication date: August 15, 2013
    Applicant: I-SHOU UNIVERSITY
    Inventors: Chii-Maw Uang, Zu-Sheng Ho, Ge-Wei Lee