Tracking loop type digital angle converter and angle/digital...

Details Tracking loop type digital angle converter and angle/digital... Tracking loop type digital angle converter and angle/digital...

2008-02-25

2009-06-02

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

C702S085000

Reexamination Certificate

active

07541951

ABSTRACT:
A tracking loop type digital angle converter that operates so that a deviation between input and output angles always becomes zero by feeding back the output angle to the input angle, wherein in order to eliminate a case where a control deviation decreases an angle error between the input and output angles is in the vicinity of 180°, i.e., where response becomes low, there are provided a detected signal sign judging section (41) that judges signs of rotation detection signals to determine a quadrant where the input angle exists, and an output angle correcting section (42) for comparing an angle region of the output angle and the quadrant of the input angle to detect a state where the angle error is excessive, judging that the control response is low and carrying out a process for compensating the output angle.

REFERENCES:
patent: 4591269 (1986-05-01), Mohr
patent: 5517689 (1996-05-01), Hayashihara
patent: 2004/0107586 (2004-06-01), Nakamura et al.
patent: 2008/0172202 (2008-07-01), Nakazato
patent: 0902543 (1999-03-01), None
patent: 1059731 (2000-12-01), None
patent: 1199808 (2002-04-01), None
patent: 2000-353957 (2000-12-01), None
EP Extended Search Report, Jul. 16, 2008.

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