Patents by Inventor Kuo-Ing Hwu

Kuo-Ing Hwu 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).

  • Voltage compensating circuit for a sensorless type DC brushless motor
    Patent number: 7148639
    Abstract: A compensating circuit for compensating the terminal voltage on the armature in a sensorless type DC brushless motor apparatus is described. The driving circuit of the motor apparatus outputs a three-phase power, and each phase is connected with a compensating circuit. The compensating circuit has a reference voltage, a resistance device, a diode device, a differential amplifier and a processor. The two terminals of the resistance device are respectively connected to the reference voltage and the anode of the diode device. The cathode of the diode device is connected to an output of the three-phase power supply. The two input terminals of the differential amplifier are respectively connected to the two terminals of the resistance device. The processor accepts the signal output from the differential amplifier and then calculates and outputs a compensating voltage.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: December 12, 2006
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Che Yang, Tai-Ming Huang, Chih-Hsin Chen, Mu-Ping Chen, Chih-Hsing Fang, Kuo-Ing Hwu
  • Voltage compensating circuit for a sensorless type DC brushless motor
    Publication number: 20060145641
    Abstract: A compensating circuit for compensating the terminal voltage on the armature in a sensorless type DC brushless motor apparatus is described. The driving circuit of the motor apparatus outputs a three-phase power, and each phase is connected with a compensating circuit. The compensating circuit has a reference voltage, a resistance device, a diode device, a differential amplifier and a processor. The two terminals of the resistance device are respectively connected to the reference voltage and the anode of the diode device. The cathode of the diode device is connected to an output of the three-phase power supply. The two input terminals of the differential amplifier are respectively connected to the two terminals of the resistance device. The processor accepts the signal output from the differential amplifier and then calculates and outputs a compensating voltage.
    Type: Application
    Filed: December 27, 2005
    Publication date: July 6, 2006
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ming-Che Yang, Tai-Ming Huang, Chih-Hsin Chen, Mu-Ping Chen, Chih-Hsing Fang, Kuo-Ing Hwu
  • Reciprocating and rotary magnetic refrigeration apparatus
    Patent number: 6935121
    Abstract: A reciprocating and rotating magnetic refrigeration apparatus adopts a dynamo concept and the design of magnetic supply path and heat transfer unit to alternately magnetize and demagnetize a magnetocaloric material to generate thermo-magnetic effect for cooling. The apparatus includes magnetocaloric material located on the head of stator nose poles, magnetic supply coils surrounding the magnetocaloric material, permanent magnets located on a rotating stator, and a heat transfer unit in contact with the magnetocaloric material. Two adjacent magnetocaloric materials magnetize and demagnetize alternately to alter the temperature and entropy of the magnetocaloric material, and through the heat transfer unit, heat exchange occurs between the magnetocaloric materials and the atmosphere to achieve the cooling effect.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: August 30, 2005
    Assignee: Industrial Technology Research Institute
    Inventors: Chih-Hsing Fang, Wen-Nan Huang, Chih-Hsin Chen, Wan-Pei Chen, Kuo-Ing Hwu