COMPENSATION METHOD OF TIME DELAY OF SENSORS FOR MOTOR DRIVE SYSTEMS USING NETWORKS

摘要

A method for compensating for a time delay of a motor driving sensor is provided to reduce an error of an estimated sensor value by using two slopes for measuring the sensor value. Synchronous signals are transmitted to respective sensor modules via a network from a control module per every 450 micro second. The sensors, which receive the synchronous signals, initialize inner-module timers at the same time. A current sensor module, a voltage sensor module, and a velocity sensor module sequentially transmit respective sensor values to the control module based on the initialized timer value per every 150 micro second. Current and voltage values, which are used in next two sampling periods, are estimated by using the transmitted voltage and current values. A detected result from a velocity measuring mode is used to estimate the next two sampling periods.