Patent ID: 11863091
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method of operating a reduced voltage soft starter (RVSS) that drives a motor, the method comprising:
sensing voltages provided to the RVSS to produce first voltage signals;
sensing phase currents of the motor to generate respective phase current signals for respective phases;
generating respective load-side line-to-neutral voltage signals for the respective phases from the first voltage signals; and
detecting when the phase currents are within detection windows around zero current levels responsive to the phase current signals; and
notching the load-side line-to-neutral voltage signals based on the phase current signals during the detection windows to generate respective notched line-to-neutral voltage signals representative of respective line-to-neutral voltages of the motor.