SOFT STARTER SYSTEM AND METHOD OF OPERATING SAME

摘要

A system and method for automatically defining and tuning operating parameters for a motor control device with minimal or no operator input is disclosed. The system includes a motor control device electrically connectable to an AC motor and a controller that is programmed to define a motor start-up function based on a rated current of the motor, the motor start-up function comprising an initial torque factor and an initial ramp time. The controller also triggers switching devices of the motor according to the motor start-up function to inject current into the motor during a first trial run, monitors operating conditions of the motor and motor control device during the first trial run, modifies the motor start-up function based on the monitored operating conditions, and triggers the plurality of switching devices according to the modified motor start-up function to inject current into the motor during a subsequent trial run.

主权项

1. A motor control device electrically connectable to an AC motor, the motor control device comprising:
a plurality of switching devices comprising at least one switch corresponding to a respective phase of the AC motor; and a controller programmed to:
define a motor start-up function based on a rated current of the AC motor, the motor start-up function comprising an initial torque factor and an initial ramp time;trigger the plurality of switching devices according to the motor start-up function to inject current into the AC motor during a first trial run;monitor operating conditions of at least one of the AC motor and the motor control device during the first trial run;modify the motor start-up function based on the monitored operating conditions; andtrigger the plurality of switching devices according to the modified motor start-up function to inject current into the AC motor during a subsequent trial run.