Patents by Inventor T. M. Cheng

T. M. Cheng 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).

  • Patent number: 4937723
    Abstract: The problem of providing overload protection in a power generating system (10) is solved with an overload control (56) disclosed herein. The overload control (56) is used in connection with an inverter (50) which develops AC power at a select voltage level from a source (48) of DC power and includes an inverter switch controller (59) for developing switching signals to maintain inverter output voltage at the select voltage level. The overload control (56) includes an inverter output current sensor (66) and a current setpoint developing device (84). A logic control (92) is operatively associated with the inverter switch controller (59) for developing switching signals to control inverter output current if the actual inverter output current exceeds the desired inverter output current.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: June 26, 1990
    Assignee: Sundstrand Corporation
    Inventors: Gregory I. Rozman, T. M. Cheng