Patents by Inventor Shui-Chu Cheng

Shui-Chu 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).

  • Uninterruptible power supply with AC sine wave output and energy recycle function
    Patent number: 6094363
    Abstract: An uninterruptible power supply with sine wave AC output and energy recycle function is disclosed. The uninterruptible power supply makes use of a DC/DC converter to boost and convert the DC voltage of a battery set to a full-wave rectified shaped DC voltage. A microcontroller is provided to generate a full-wave rectified shaped DC reference signal to force the DC/DC converter to follow the reference signal for adjusting its output to a full-wave rectified shaped DC voltage. The full-wave rectified shaped DC voltage is converted by an inverter to a sine wave AC voltage for providing uninterruptible power. An energy recycle charger is further provided to recycle redundant energy to the battery set.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: July 25, 2000
    Assignee: Phoenixtec Power Co., Ltd.
    Inventor: Shui-Chu Cheng