Patent ID: 11959679
Assignee: REGAL BELOIT AMERICA, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 0:
1. A fan drive circuit for a variable speed fan motor in a cooling system, said fan drive circuit comprising:
a fan inverter configured to supply a current signal to stator windings of the variable speed fan motor;
a sensor coupled to a power input stage of a compressor motor and configured to generate a sensor signal, wherein the sensor signal represents an amplitude of one of a current or a power at the power input stage; and
a digital signal processor (DSP) coupled to said fan inverter and said sensor, said DSP configured to:
receive the sensor signal corresponding to the amplitude from said sensor;
select a frequency corresponding to the amplitude at which to operate the variable speed fan motor; and
transmit control signals to said fan inverter to supply current to the stator windings at the selected frequency.