Patents by Inventor Rainman Xiao

Rainman Xiao 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).

  • Portable appliance motor control with speed-based current limitation
    Patent number: 10291172
    Abstract: A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 14, 2019
    Assignee: Whirlpool Corporation
    Inventors: Dan Christian Barfus, Wayne Weaver Conard, Alex Lai, Rainman Xiao
  • PORTABLE APPLIANCE MOTOR CONTROL WITH SPEED-BASED CURRENT LIMITATION
    Publication number: 20180013374
    Abstract: A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.
    Type: Application
    Filed: September 20, 2017
    Publication date: January 11, 2018
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Dan Christian Barfus, Wayne Weaver Conard, Alex Lai, Rainman Xiao
  • Portable appliance motor control with speed-based current limitation
    Patent number: 9780718
    Abstract: A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: October 3, 2017
    Assignee: Whirlpool Corporation
    Inventors: Dan Christian Barfus, Wayne Weaver Conard, Alex Lai, Rainman Xiao
  • PORTABLE APPLIANCE MOTOR CONTROL WITH SPEED-BASED CURRENT LIMITATION
    Publication number: 20130214716
    Abstract: A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.
    Type: Application
    Filed: November 2, 2010
    Publication date: August 22, 2013
    Applicant: Whirlpool Corporation
    Inventors: Dan Christian Barfus, Wayne Weaver Conard, Alex Lai, Rainman Xiao