Patents Assigned to Emerson Climate Technologies
  • Crankcase heater systems and methods for variable speed compressors
    Patent number: 9810218
    Abstract: A system includes a compressor having a shell housing a compression mechanism driven by an electric motor in an on state and not driven by the electric motor in an off state. The system also includes a variable frequency drive that drives the electric motor in the on state by varying a frequency of a voltage delivered to the electric motor and that supplies electric current to a stator of the electric motor in the off state to heat the compressor.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: November 7, 2017
    Assignee: Emerson Climate Technologies
    Inventors: Daniel L. McSweeney, Charles E. Green, Stephen M. Seibel