Patents by Inventor Der-Min Tsay

Der-Min Tsay 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: 20130026763
    Abstract: A wind power excitation synchronous generation system and a control method thereof are disclosed. In this control method, dual input shafts and a single output shaft of a gear transmission mechanism are used, and two kinds of inputted energy, such as wind energy and servo motor control power, are integrated, so as to allow the output shaft to drive an excitation synchronous generator to generate electric power. In this system, a rotation speed and a phase of a servo motor are controlled, so as to allow the excitation synchronous generator to output the electric power with a frequency and a phase identical to the utility grid. Furthermore, a control circuit for maximum power tracking is used to control an excitation current of the excitation synchronous generator for achieving a stable voltage, the maximum outputted wind energy and the minimum energy consumption of the servo motor.
    Type: Application
    Filed: January 7, 2012
    Publication date: January 31, 2013
    Applicant: National Sun Yat-Sen University
    Inventors: TZUEN-LIH CHERN, Der-Min Tsay, Jao-Hwa Kuang, Guan-Shyong Hwang, Li-Hsiang Liu, Wei-Ting Chen, Ping-Lung P. Pan, Tsung-Mou Huang
  • Patent number: 8308596
    Abstract: A transmission mechanism with intermittent output movement includes an output shaft rotatably mounted to first and second cams and a sun gear mounted to the output shaft. A first rocker includes a first planet gear meshed with the sun gear and first and second rollers rotatably mounted on opposite sides of the first planet gear and respectively in contact with the first and second cams. A second rocker includes a second planet gear meshed with the sun gear. An end of a first connecting rod is mounted to the first rocker. An end of a second connecting rod is mounted to the second rocker. Two ends of a link are rotatably mounted to the other ends of the first and second connecting rods. A planet gear carrier is mounted to an input shaft coaxial to the input shaft and includes an end rotatably mounted to the first rocker.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: November 13, 2012
    Assignee: National Sun Yat-Sen University
    Inventors: Der-Min Tsay, Hsin-Pao Chen, Hsien-Wen Hsu, Chih-Wei Huang
  • Patent number: 8257076
    Abstract: A multi-rod structure for opening and closing molds is provided and includes a single cam, a first side connection rod assembly located on a first side of the cam and having a first side triple connection rod, a first mold actuated by the first side triple connection rod, a linkage connection rod, a second side connection rod assembly located on a second side of the cam and having a second side triple connection rod actuated by the linkage connection rod, and a second mold actuated by the second side triple connection rod. The multi-rod structure only uses the single cam to simultaneously actuate the first and second molds, so that the structure can be simplified, while the vibration, loading, noise and abrasion of components during operation can be relatively reduced.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: September 4, 2012
    Assignee: National Sun Yat-Sen University
    Inventors: Der-min Tsay, Hsin-pao Chen, Shih-han Chen
  • Publication number: 20120021865
    Abstract: An independently controllable transmission mechanism includes a first planetary gear train, a second planetary gear train, a first transmission-connecting set and a second transmission-connecting set. The first planetary gear train and the second planetary gear train are serially connected to form a series type. The independently controllable transmission mechanism has a first power output end, a transmission control end, a first power input end and a free-transmission end. The first power output end is provided on the first planetary gear train and the transmission control end is provided on the second planetary gear train. The first power input end is provided on the first transmission-connecting set and the free-transmission end is provided on the second transmission-connecting set. The transmission control end controls the free-transmission end to be functioned as a second power input end or a second power output end.
    Type: Application
    Filed: October 3, 2011
    Publication date: January 26, 2012
    Inventors: Guan-Shyong Hwang, Der-Min Tsay, Jao-Hwa Kuang, Tzuen-Lih Chern
  • Publication number: 20120021866
    Abstract: An independently controllable transmission mechanism includes a first planetary gear train and a second planetary gear train. The first planetary gear train and the second planetary gear train are mechanically connected in parallel to form a parallel type. The controllable transmission mechanism has a first power output end, a transmission control end, a first power input end and a free-transmission end. The first power output end is provided on the first planetary gear train and the transmission control end is provided on the second planetary gear train. When the first power input end is provided on the first planetary gear train or the second planetary gear train, the free-transmission end is provided on the second planetary gear train or the first planetary gear train. The transmission control end controls the free-transmission end to be functioned as a second power input end or a second power output end.
    Type: Application
    Filed: October 3, 2011
    Publication date: January 26, 2012
    Inventors: Guan-Shyong Hwang, Der-Min Tsay, Jao-Hwa Kuang, Tzuen-Lih Chern
  • Publication number: 20110287121
    Abstract: A multi-rod mechanism for opening and closing molds is provided and includes a single cam, a first side connection rod assembly located on a first side of the cam, a first mold actuated by the first side connection rod assembly, a linkage connection rod, a second side connection rod assembly located on a second side of the cam and actuated by the linkage connection rod, and a second mold actuated by the second side connection rod assembly. The multi-rod mechanism only uses the single cam to simultaneously actuate the first and second molds, so that the structure of the multi-rod mechanism can be simplified, while the vibration, loading, noise and abrasion of components during operation can be relatively reduced.
    Type: Application
    Filed: February 2, 2011
    Publication date: November 24, 2011
    Applicant: National Sun Yat-Sen University
    Inventors: Der-min Tsay, Hsin-pao Chen, Shih-han Chen
  • Publication number: 20110287130
    Abstract: A multi-rod structure for opening and closing molds is provided and includes a single cam, a first side connection rod assembly located on a first side of the cam and having a first side triple connection rod, a first mold actuated by the first side triple connection rod, a linkage connection rod, a second side connection rod assembly located on a second side of the cam and having a second side triple connection rod actuated by the linkage connection rod, and a second mold actuated by the second side triple connection rod. The multi-rod structure only uses the single cam to simultaneously actuate the first and second molds, so that the structure can be simplified, while the vibration, loading, noise and abrasion of components during operation can be relatively reduced.
    Type: Application
    Filed: February 3, 2011
    Publication date: November 24, 2011
    Applicant: National Sun Yat-Sen University
    Inventors: Der-min Tsay, Hsin-pao Chen, Shih-han Chen
  • Publication number: 20110277732
    Abstract: An engine structure having a conjugate cam assembly is provided and includes a piston which can be used to push or pulled by the conjugate cam assembly mounted on a camshaft through a connection rod, a roller rocker and two rollers. The conjugate cam assembly has two cams with cam profiles and relative arrangement angle which can be varied according to actual operational desire, so as to vary the ratio of intake/exhaust strokes and the ratio of compression/power strokes. Thus, the combustion efficiency and the exhaustion efficiency can be enhanced. When the camshaft finishes four strokes of an operational cycle, the camshaft only rotates one circle (i.e. 360 degree), so that the rotation speed of the camshaft can be lowered.
    Type: Application
    Filed: May 11, 2010
    Publication date: November 17, 2011
    Applicant: National Sun Yat-Sen University
    Inventors: Der-Min TSAY, Hsin-pao CHEN, Ting-hao CHENG
  • Patent number: 8033817
    Abstract: A multi-rod mechanism includes at least one ternary link and a plurality of binary links. The ternary link and the binary links are connected between a first fixing pivot point and a second fixing pivot point to form a combination of the ternary link and the binary links. The combination of the ternary link and the binary links is designed to provide a first movable pivot point and a second movable pivot point between the first fixing pivot point and the second fixing pivot point. In operation, the ternary link and the binary links are rotated to move the first movable pivot point and the second movable pivot point toward or away from each other in opposite directions.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: October 11, 2011
    Assignee: National Sun Yat-Sen University of Kaohsiung
    Inventors: Der-Min Tsay, Hsin-Pao Chen, Shih-Han Chen
  • Publication number: 20110111904
    Abstract: An independently controllable transmission mechanism with an identity-ratio series type includes a first planetary gear train and a second planetary gear train mechanically connected therewith. The transmission mechanism has a power output end, a transmission control end, a power input end and a free transmission end. The power output end and the transmission control end are provided on the first planetary gear train and the second planetary gear train, respectively. The power input end is provided on the first planetary gear train or the second planetary gear train while the free transmission end is provided on the second planetary gear train or the first planetary gear train. The transmission control end is operated to freely shift the free transmission end as a power input end or a power output end.
    Type: Application
    Filed: January 15, 2011
    Publication date: May 12, 2011
    Inventors: Guan-Shyong Hwang, Der-Min Tsay, Chung-Chi Lin, Jao-Hwa Kuang, Tzuen-Lih Chern
  • Publication number: 20110053722
    Abstract: An independently controllable transmission mechanism includes a first planetary gear set, a second planetary gear set, a first transmission-connecting set and a second transmission-connecting set. The first planetary gear set includes a first power output end, the second planetary gear set includes a transmission control end, the first transmission-connecting set includes a first power input end and the second transmission-connecting set includes a free transmission end. The transmission control end controls the free transmission end to function as a second power input end or a second power output end.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Inventors: Guan-Shyong Hwang, Der-Min Tsay
  • Publication number: 20110048152
    Abstract: A multi-rod mechanism includes at least one ternary link and a plurality of binary links. The ternary link and the binary links are connected between a first fixing pivot point and a second fixing pivot point to form a combination of the ternary link and the binary links. The combination of the ternary link and the binary links is designed to provide a first movable pivot point and a second movable pivot point between the first fixing pivot point and the second fixing pivot point. In operation, the ternary link and the binary links are rotated to move the first movable pivot point and the second movable pivot point toward or away from each other in opposite directions.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Inventors: Der-Min Tsay, Hsin-Pao Chen, Shih-Han Chen
  • Publication number: 20100126290
    Abstract: A transmission mechanism with intermittent output movement includes an output shaft rotatably mounted to first and second cams and a sun gear mounted to the output shaft. A first rocker includes a first planet gear meshed with the sun gear and first and second rollers rotatably mounted on opposite sides of the first planet gear and respectively in contact with the first and second cams. A second rocker includes a second planet gear meshed with the sun gear. An end of a first connecting rod is mounted to the first rocker. An end of a second connecting rod is mounted to the second rocker. Two ends of a link are rotatably mounted to the other ends of the first and second connecting rods. A planet gear carrier is mounted to an input shaft coaxial to the input shaft and includes an end rotatably mounted to the first rocker.
    Type: Application
    Filed: October 27, 2009
    Publication date: May 27, 2010
    Inventors: Der-Min Tsay, Hsin-Pao Chen, Hsien-Wen Hsu, Chih-Wei Huang