Patent ID: 11888430
Assignee: MAGNETEK, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 12:
13. A method for increasing resolution of a position feedback signal to a motor drive, the method comprising the steps of:
receiving a position feedback signal at an input to the motor drive;
determining a number of counts in the motor drive as a function of the position feedback signal;
monitoring the number of counts at a first time interval;
incrementing a first counter within the motor drive during the first time interval when a new count is detected;
reading a high resolution counter register from a high resolution counter during each of the first time intervals;
adding a value of the first counter to the high resolution counter register to obtain a new value for the high resolution counter register during each of the first time intervals;
storing the new value in the high resolution counter register during each of the first time intervals; and
executing a speed regulator in the motor drive during a second time interval, wherein:
the speed regulator uses the high resolution counter, and the second time interval is longer than the first time interval.