Patents by Inventor Shiu-Ming CHANG

Shiu-Ming CHANG 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).

  • Direct-current motor control device
    Patent number: 9819291
    Abstract: A direct-current (DC) motor control device includes first and second switches, a conducting element and a power storage element. The power storage element, the conducting element and the second switch are connected to each other and form a loop, and the first switch is connected to a common node between the power storage element and the conducting element. When the DC electric power source is normally connected to the DC motor control device, the first switch is turned on, and the conducting element establishes a unidirectional conduction from a DC motor to the power storage element while the second switch is turned off.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 14, 2017
    Assignee: Quan Mei Technology Co., Ltd.
    Inventors: Shiu-Ming Chang, Kuo-Hsien Huang
  • DIRECT-CURRENT MOTOR CONTROL DEVICE
    Publication number: 20170040917
    Abstract: A direct-current (DC) motor control device includes first and second switches, a conducting element and a power storage element. The power storage element, the conducting element and the second switch are connected to each other and form a loop, and the first switch is connected to a common node between the power storage element and the conducting element. When the DC electric power source is normally connected to the DC motor control device, the first switch is turned on, and the conducting element establishes a unidirectional conduction from a DC motor to the power storage element while the second switch is turned off.
    Type: Application
    Filed: July 22, 2016
    Publication date: February 9, 2017
    Inventors: Shiu-Ming CHANG, Kuo-Hsien HUANG