Abstract: A method of determining an angle by an encoder includes generating a first angle data based on a rotation of a bipolar magnet and a second angle data based on a rotation of the multipolar magnet; determining a first waveform signal based on the first angle data and a second waveform signal based on the second angle data; converting the first waveform signal into a third waveform signal having a cycle similar to the second waveform signal; calculating an angle result value as a function of the second angle data and a determined value about a location of a rotation cycle of the multipolar magnet based on a difference between the second waveform signal and the third waveform signal; and determining an absolute angle corresponding to the calculated angle result value based on stored angle data.
Type:
Grant
Filed:
May 4, 2017
Date of Patent:
August 27, 2019
Assignee:
FASTECH CO., LTD.
Inventors:
Jae Wook Jeon, Nguyen Xuan Ha, Jae Wan Park, Jun Young Moon, Tae Won Kim, Do Eon Lee