US 12,261,555 B2
Motor current optimization control method and system
Chih-Hung Hsiao, Taipei (TW); and Hsien-Lai Yu, Taipei (TW)
Assigned to TECO ELECTRIC & MACHINERY CO., LTD., Taipei (TW)
Filed by TECO Electric & Machinery Co., Ltd., Taipei (TW)
Filed on Jun. 6, 2023, as Appl. No. 18/329,937.
Prior Publication US 2024/0413774 A1, Dec. 12, 2024
Int. Cl. H02P 21/00 (2016.01); H02P 21/22 (2016.01)
CPC H02P 21/22 (2016.02) 5 Claims
OG exemplary drawing
 
1. A motor current optimization control method, configured to optimize an input current to a motor, comprising the steps of:
(A) while the motor is steadily run at a set speed, setting a d-axis current command value of the input current to be 0 initially, increasing step-wisely the d-axis current command value at least twice by an increment, and collecting at least three real-time feedback current values by detecting the feedback current of the motor at each said d-axis current command value;
(B) determining step-wisely whether or not an instant detected of the at least three real-time feedback current values is less than a previous detected of the instant detected, and increasing the d-axis current command value by the increment if positive;
(C) determining that a recent detected of the at least three real-time feedback current values is larger than a previous detected of the recent detected, defining the previous detected of the recent detected as a minimum feedback current value, and defining the d-axis current command value corresponding to the minimum feedback current value as an optimized d-axis current command value; and
(D) setting the optimized d-axis current command value as the d-axis current command value of the input current for controlling the motor to keep running steadily at the set speed.