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US 8,299,653 B2Granted
HVAC/R system with variable frequency drive power supply for three-phase and single-phase motors
AssigneeRocky Research
InventorsUwe Rockenfeller, Paul Sarkisian, Kaveh Khalili, Warren Harhay
Life of this patent
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Abstract
An HVAC/R system is configured with a variable frequency drive power supply which provides power to both a three-phase motor and to a single-phase motor. In some embodiments, the three-phase motor is a compressor motor and the single-phase motor is a condenser fan motor.
Claims17
A heating, ventilation, air conditioning, and refrigeration (HVAC/R) system, comprising:
- a first power supply configured to output three-phase AC power at variable frequencies;
- a three-phase AC compressor motor electrically connected to the first power supply;
- a phase change module electrically connected to the first power supply and configured to receive three-phase AC power from the first power supply and output single-phase AC power;
- a single-phase AC evaporator fan electrically connected to the phase change module and configured to receive single-phase AC power from the phase change module;
- a control module electrically connected to the first power supply and configured to provide control signals to the first power supply;
- a condenser;
- an evaporator;
- and
- a pulsed operation control valve configured to control the flow of refrigerant between the condenser and the evaporator.
6 more elements
A method of controlling a heating, ventilation, air conditioning, and refrigeration (HVAC/R) system, the method comprising:
- providing three-phase AC power at a first frequency from a first power supply to a first three-phase AC motor;
- providing single-phase AC power at the first frequency from a phase change module to a single-phase AC motor;
- wherein the phase change module is configured to receive three-phase AC bower and output single-phase AC power;
- changing the speed of the first three-phase AC motor by providing a first control signal from a control module to the first power supply so that the first power supply provides AC power to the first three-phase AC motor at a second frequency;
- and
- providing a pulsed operation control valve to control the flow of refrigerant to an evaporator.
3 more elements
Dependencies are inferred from the claim text.