RD converter and angle detecting apparatus

Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C324S207250

Reexamination Certificate

active

08004434

ABSTRACT:
An RD converter is disclosed that has a first multiplier multiplying a resolver signal S1by an output of a SIN ROM; a second multiplier multiplying a resolver signal S2by an output of a COS ROM; a subtractor subtracting an output of the first multiplier from an output of the second multiplier; a synchronous detecting circuit detecting synchronously an output of the subtractor with reference to an excitation signal; a controller controlling an output angle θ′ to make an output of the synchronous detecting circuit equal to zero; a correction data part outputting a correction angle θcfor the output angle θ′; an adder adding the output angle θ′ and the correction angle θc; the SIN ROM producing a sine value of a result from the adder; and the COS ROM producing a cosine value of the result.

REFERENCES:
patent: 4340939 (1982-07-01), Mayer
patent: 5739659 (1998-04-01), Ezuka
patent: 5760562 (1998-06-01), Woodland et al.
patent: 6278388 (2001-08-01), Kushihara
patent: 6608573 (2003-08-01), Kushihara
patent: 2006/0061306 (2006-03-01), O'Gorman et al.
patent: H01-174914 (1989-07-01), None
patent: 10-170531 (1998-06-01), None
patent: 2002-131083 (2002-05-01), None
Office Action issued on Nov. 24, 2010 by the Japanese Patent Office for counterpart foreign patent application JP 2009-006909.
Extended European Search Report issued on Jan. 20, 2011 by the European Patent Office for counterpart foreign patent application EP 10 150 792.9.
S.K. Kaul, et al., “Improving the accuracy of low-cost resolver-based encoders using harmonic analysis,” Nuclear Instruments & Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, Amsterdam, vol. 586, No. 2, Jan 7, 2008, pp. 345-355.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

RD converter and angle detecting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with RD converter and angle detecting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RD converter and angle detecting apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2796066

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.