Compressor sensor module

摘要

A sensor module for a compressor having an electric motor connected to a power supply and a processor disposed within an electrical enclosure of the compressor is provided, with the electrical enclosure being configured to house electrical terminals for connecting the power supply to the electric motor. The sensor module includes a first input connected to a voltage sensor that generates a voltage signal corresponding to a voltage of the power supply and a second input connected to a current sensor that generates a current signal corresponding to a current of the power supply. The processor is connected to the first and second inputs. The processor may calculate a power factor of the compressor, detect an unexpected variation in the power supply, and/or detect a mechanical malfunction of the compressor based on the voltage measurements and the current measurements.

主权项

1. A sensor module for a compressor having an electric motor connected to a power supply that includes first, second, and third phases, the sensor module comprising:
a first input connected to a first voltage sensor that generates a first voltage signal corresponding to a voltage of said first phase of said power supply; a second input connected to a second voltage sensor that generates a second voltage signal corresponding to a voltage of said second phase of said power supply; a third input connected to a third voltage sensor that generates a third voltage signal corresponding to a voltage of said third phase of said power supply; a fourth input connected to a current sensor that generates a current signal corresponding to a current of said first phase of said power supply; a processor connected to said first, second, third, and fourth inputs that calculates a first estimated current corresponding to a current of said second phase of said power supply and a second estimated current corresponding to a current of said third phase of said power supply based on voltage measurements from said first, second, and third inputs and current measurements from said fourth input, and that calculates a power factor of said compressor based on said voltage measurements from said first, second, and third inputs, said current measurements from said fourth input, and said first and second estimated currents.