PARALLEL HARNESS CURRENT IMBALANCE AND FAILURE DETECTION

摘要

Current imbalance may be detected in a 3-phase power system by monitoring current output between two points of a phase signal provided along wire pairs from an inverter to a motor. In some embodiments, each wire of a wire pair leading to the motor from the inverter may be provided with a line current sensor. A comparison of current output from each wire in the wire pair may be performed to determine if a current imbalance is present. In some embodiments, a phase current sensor may be coupled to a phase input of the inverter. Failures in the 3-phase system may be detected by measuring the output from each phase current sensor for imbalanced distribution of power output. In some embodiments, the output from the phase current sensors may be compared to an output of a line current sensor along the same phase for current imbalances or harness failures.

主权项

1. A current imbalance detection system in a 3-phase power system, comprising:
an inverter; a motor; a plurality of current sensors connected to wires that are configured to carry 3-phase current from the inverter to the motor; a processor coupled with the motor; and memory coupled to the processor, including instructions, which when executed by the processor, compare measurements of at least two of the plurality of current sensors and determine whether a current imbalance is present in the 3-phase power system.